Excavator training equipment is an earthmoving machine that uses a bucket to dig materials higher or lower than the bearing surface and load them into transport vehicles or unload them to the stockpile.
First, the main features:
1) The SG-38C hydraulic excavator control teaching training platform designed by our company is a modern teaching product that can be transferred to the classroom to learn the structural principle of the hydraulic excavator, the excavator body is made of imported plexiglass, corrosion resistance, good wear resistance, long-term discoloration, transparent and intuitive, and the demonstration effect is realistic.
2) The cabinet body is made of 1mm thick SPCC cold rolled plate, which is firm and beautiful, and the surface is made of medium-temperature phosphating anti-rust paint and electrostatic spraying.
The cabinet is equipped with four universal wheels, which is convenient for the handling and disassembly of the equipment.
3) The cabinet is equipped with four universal wheels, which is convenient for the handling and disassembly of the equipment.
4) Control mode: (1) relay control, (2) PLC control using Mitsubishi FX1S 20MR
2. Learning Objectives:
Understand the basic structure of an excavator.
Learn about the drive system of an excavator.
Learn about the hydraulic system of an excavator.
Learn the principle of manual control of an excavator.
Learn the principle of automatic control of excavators.
Cooperate with the test bench to carry out the experiment
The principle of action of the excavator eight.
Lower the arm. Lower lower arm.
Retract the bucket. Open forearm.
Tucked in the forearm. Rotate to the left.
Rotate to the right. 3. Basic circuit test of hydraulic transmission
1) Reversing circuit with reversing valve
2) Locking circuit with "O" type functional reversing valve.
3) Latching circuit with hydraulically controlled check valve
4) Pressure setting circuit.
5) Secondary pressure circuit.
6) Pressure reducing circuit with pressure reducing valve.
7) Pressurization circuit with booster cylinder.
8) Unloading circuit with reversing valve.
9) Oil inlet throttling speed regulation circuit.
10) Oil return throttle speed regulation circuit.
11) Speed regulating circuit of speed regulating gear pump.
12) Composite speed regulating circuit of speed regulating gear pump and speed regulating valve.
13) The speed of the flow valve is shorted to the speed change circuit
14) Secondary feed circuit.
15) Sequential action circuit with sequential valve.
16) Sequential action circuit with pressure relay.
17) Sequential action circuit with electrical travel switch.
18) Sequential action circuit with stroke valve.
Fourth, the basic parameters:
1. Dimensions of the test bench: 1500 700 1800mm (length, width and height).
2. Demo table dimensions: 700 700 1330mm (length, width and height).
3. Power supply: 220V 50Hz (mains).
4. Hydraulic experimental pumping station 500 350 300mm (length, width and height).
5. Working power supply: AC: 220V permanent magnet speed regulating motor, speed regulation range: 0-1500 rpm.
6. Safety speed limit range: 1-1500 rpm The hydraulic pump is 15m distance noise 58db
7. Demonstration experimental oil circuit liquid flow requires the pressure of only 03-0.5MPa (maximum pressure of oil pump: pmax 1.)5mpa)
8. When the hydraulic pump is working, it is 15m distance noise 58db
5. Description of hydraulic components:
1) Double-acting cylinder stroke.
Function introduction:
1. Effective volume of oil cylinder: 80 ml
Maximum stroke of the cylinder: 100 mm
Working pressure range: 0---04 mpa
2. The cylinder block, end cover, stroke bumper and bumper support are all made of imported transparent plexiglass materials, and the push rod is made of No. 45 medium carbon steel, and is refined with standard parts such as oil joints, sealing rings and hexagon screws, etc., through which the structure and operation process of the piston, ejector rod, oil seal and oil hole can be observed, and it has transparent hydraulic experimental elements.
1. The double-acting cylinder and the cylinder bumper block support are all installed in a combination of elastic pins, and there are multiple positioning and installation elastic pins installed behind them.
2. When the double-action cylinder is installed, the A hole and the B hole should be turned upwards as far as possible, so as to automatically discharge the air in the cavity during operation, and the collision block support is mainly used in the hydraulic circuit controlled by the travel switch. When installing the oil cylinder, the distance between the ejector rod and the edge when the ejector rod is at the maximum stroke should be taken into account, so as to avoid damage to the equipment caused by the ejector rod of the cylinder on the edge of the test bench.
3. It is forbidden to pull the piston hard through the push rod to prevent the connection between the piston and the push rod from being pulled off, but the piston can be pushed inward through the push rod.
4. Each equipment is equipped with two sets of double-acting cylinders, and the stroke bumper and bumper support are supported to meet the experimental requirements.
2) Spring return cylinder
Function introduction:
1. Technical parameters
Effective cylinder volume: 40 ml
Maximum stroke of cylinder: 60 mm
Maximum working range: 0--06 mpa
2. The cylinder body and end cover of the spring return cylinder are made of imported transparent plexiglass materials, transparent and clear, the push rod is made of 45 medium carbon steel material, and is assembled with standard parts such as oil joints, sealing rings and hexagon screws, through which the piston, push rod, oil seal, oil hole, spring and other structures and their operation processes can be clearly observed, with the advantages of vivid image and reliable work, it can be used as a teaching model, but also as a hydraulic experimental element for experimental demonstration.
3. The spring return cylinder adopts the combined installation method of elastic pins, and there are multiple positioning and installation elastic pins installed behind it. When using, all the prongs should be aligned with the jack, and then pushed in parallel to reliably install where needed.
4. When installing the cylinder, the distance between the push rod and the edge when the push rod is in the maximum stroke should be taken into account, so as to avoid damage to the equipment caused by the top rod of the oil cylinder on the edge of the test bench.
5. Each equipment is only equipped with one spring circuit spring circuit cylinder.
6. It is forbidden to pull the piston through the push rod to prevent the connection between the piston and the push rod from being pulled off.
3) Booster cylinder
Function introduction:
1. Technical parameters
Effective volume of low-pressure cylinder: 138ml
Effective volume of booster cylinder: 54ml
Maximum stroke of cylinder piston: 110mm
The pressure range of the low-pressure cylinder: 0--06mpa
Pressure range of booster cylinder: 0--10mpa
2. The front end cover, rear end cover, low-pressure cylinder block, pressurized cylinder block, etc. of the booster cylinder are all made of imported transparent plexiglass materials, transparent and clear, the piston rod is made of alloy aluminum material, and is assembled with standard parts such as oil joints, sealing rings, hexagon screws, etc., through which the piston rod, oil seal, oil hole and other structures and their operation processes can be clearly observed, with the advantages of vivid image and reliable work, it can be used as a teaching model, but also for experimental demonstration of hydraulic experimental elements.
3. The booster cylinder adopts the combined installation method of elastic pins, and there are multiple positioning and installation elastic pins behind it. When using, all the prongs should be aligned with the jack and then pushed in parallel to reliably install in the desired position.
4. For the booster cylinder with only one P hole, a tee can be connected at the P hole instead, which does not affect the work and experiment.
5. When the booster cylinder is installed, the A hole and B hole should be facing up as much as possible, so that the air in the cavity can be automatically discharged during operation.
6. Each equipment is equipped with only one booster cylinder.
4) Check valve
Function introduction:
1. Technical parameters
Working pressure range: 0--10mpa
Rated flow: 0--10l/min
2. The structure of the check valve refers to the domestic I-63B plate check valve, the valve body, screw plug, etc. are refined from imported transparent plexiglass materials, and the valve core is made of No. 45 medium carbon steel material, and is assembled with standard parts such as springs, oil joints, sealing rings, etc., through which the structure of the piston, spring, oil hole and its operation process can be clearly observed, which has the advantages of vivid image and reliable work. It can be used both as a teaching model and as a hydraulic experimental element for experimental demonstration.
3. The check valve adopts the combined installation method of elastic pins, and four positioning and installation elastic pins are installed behind it, and when using, all the pins should be aligned with the jack, and then pushed into parallel and reliably installed in the required parts.
4. When using, it should be noted that the P1 hole is the oil inlet hole, and the P2 hole is the oil outlet hole, which cannot be connected wrongly, and the oil plug in the oil hole should be pulled out first.
5. When dismantling, the force should be applied to the valve body, and the check valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with two check valves.
5) Hydraulic check valve
Function introduction:
1. Technical parameters
Working pressure range: 0--10mpa
Rated flow: 10L min
2. The structure of the hydraulically controlled check valve refers to the domestic I Y-2 5 B type hydraulic check valve, and its valve body screw plug is refined from imported transparent plexiglass materials, and the valve core and push rod are made of No. 45 medium carbon steel materials. And with springs, oil joints, seals and other standard parts assembly, through which the piston, spring, oil hole and other structures and their operation process can be clearly observed, with the image of realistic, reliable work and other advantages, it can be used as a teaching model, can also be used as a hydraulic experimental element for experimental demonstration.
3. The hydraulic control check valve adopts the combined installation method of elastic pins, and six positioning and installation elastic pins are installed behind it.
4. When using, it should be noted that P1 hole is the oil inlet hole, P2 hole is the oil return hole, and K is the control oil hole. Misconnection is not allowed, and when installing the oil circuit, the oil plug in the oil hole should be dialed out first.
5. When dismantling, the force should be applied to the valve body, and the hydraulic check valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with two hydraulic check valves.
8. Please refer to textbooks and other hydraulic books for its working principle.
6) Relief valve
Function introduction:
1. Technical parameters
Working pressure range: 0--10mpa
Rated flow: 10L min
2. The structure of the relief valve refers to the domestic P-63 B type low-pressure direct-acting relief valve, and its valve body bonnet, lock nut, adjusting nut and plug are refined by imported transparent plexiglass materials, and the valve core and adjusting rod are made of No. 45 medium carbon steel materials. And with springs, oil joints, seals and other standard parts assembly, through which the valve core, springs, oil holes and other structures and their operation process can be clearly observed, with the image of realistic, reliable work and other advantages, it can be used as a teaching model, can also be used as a hydraulic experimental element for experimental demonstration.
3. The relief valve adopts the combined installation method of elastic pins, and three positioning and installation elastic pins are installed behind it, when using, all the pins should be aligned with the jack, and then pushed into parallel and reliably installed in the required parts.
4. When using, it should be noted that the P hole is the oil inlet hole, and the O hole is the oil return hole. Misconnection is not allowed, and when installing the oil circuit, the oil plug in the oil hole should be dialed out first.
5. When dismantling, the force should be applied to the valve body, and the relief valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with two relief valves.
8. Please refer to textbooks and other hydraulic books for its working principle.
7) Throttle valve
Function introduction:
1. Technical parameters
Working pressure range: 0--10mpa
Rated flow: 10L min
2. The structure of the throttle valve refers to the domestic P-63 B type throttle valve, and its valve body, bonnet, adjusting handle, screw plug, etc. are refined by imported transparent plexiglass materials, and the valve core and push rod are made of No. 45 medium carbon steel materials. And with springs, oil joints, seals and other standard parts assembly, through which the valve core, springs, oil holes and other structures and their operation process can be clearly observed, with the image of realistic, reliable work and other advantages, it can be used as a teaching model, can also be used as a hydraulic experimental element for experimental demonstration.
3. The throttle valve adopts the combined installation method of elastic pins, and three positioning and installation elastic pins are installed behind it, when using, all the pins should be aligned with the jack, and then pushed into parallel and reliably installed in the required parts.
4. When using, it should be noted that P1 hole is the oil inlet hole, and P2 hole is the oil outlet hole. Misconnection is not allowed, and when installing the oil circuit, the oil plug in the oil hole should be dialed out first.
5. When dismantling, the force should be applied to the valve body, and the throttle valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with a throttle valve.
8. Please refer to textbooks and other hydraulic books for its working principle.
8) Speed control valve
Function introduction:
1. Technical parameters
Working pressure range: 0--10mpa
Rated flow: 10L min
2. The structure of the speed control valve refers to the domestic Q-25 B type speed control valve, and its valve body, valve cover, adjusting handle, and screw plug are refined by imported transparent plexiglass materials, and the throttle valve core, pressure reducing valve core, and push rod are made of No. 45 medium carbon steel material. And with springs, oil joints, seals and other standard parts assembly, through which the valve core, springs, oil holes and other structures and their operation process can be clearly observed, with the image of realistic, reliable work and other advantages, it can be used as a teaching model, can also be used as a hydraulic experimental element for experimental demonstration.
3. The speed control valve adopts the combined installation method of elastic pins, and five positioning and installation elastic pins are installed behind it, when using, all the pins should be aligned with the jack, and then pushed into parallel and reliably installed in the required parts.
4. It should be noted that the P1 hole is the oil inlet hole, and the P3 hole is the oil outlet hole. Misconnection is not allowed, and when installing the oil circuit, the oil plug in the oil hole should be dialed out first.
5. When dismantling, the force should be applied to the valve body, and the speed control valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with two speed regulating valves.
8. Please refer to textbooks and other hydraulic books for its working principle.
9) Ordervalves
Function introduction:
1. Technical parameters
Working pressure range: 0--10mpa
Rated flow: 10L min
2. The structure of the sequential valve refers to the domestic X-B25 B type low-pressure direct-acting sequential valve, and its valve body, bonnet, lock nut, adjusting nut, screw plug, etc. are refined by imported transparent plexiglass materials, and the valve core and adjusting rod are made of No. 45 medium carbon steel materials. And with springs, oil joints, seals and other standard parts assembly, through which the valve core, springs, oil holes and other structures and their operation process can be clearly observed, with the image of realistic, reliable work and other advantages, it can be used as a teaching model, can also be used as a hydraulic experimental element for experimental demonstration.
3. The sequential valve adopts the combined installation method of elastic pins, and three positioning and installation elastic pins are installed behind it, when using, all the pins should be aligned with the jack, and then pushed into parallel and reliably installed in the required parts.
4. When using, it should be noted that P1 hole is the oil inlet hole, P2 hole is the oil outlet hole, and L hole is the oil drain hole. Misconnection is not allowed, and when installing the oil circuit, the oil plug in the oil hole should be dialed out first.
5. When dismantling, the force should be applied to the valve body, and the sequential valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with two sequential valves.
8. Please refer to textbooks and other hydraulic books for its working principle.
10) Pressure reducing valve
Function introduction:
1. Technical parameters
Working pressure range: 0--10mpa
Rated flow: 10L min
2. The structure of the pressure reducing valve refers to the domestic J-10 B type low-pressure direct-acting pressure reducing valve, and its valve body, valve cover, lock nut, adjusting nut and screw plug are refined by imported transparent plexiglass materials, and the valve core and adjusting rod are made of No. 45 medium carbon steel. And with springs, oil joints, seals and other standard parts assembly, through which the valve core, springs, oil holes and other structures and their operation process can be clearly observed, with the image of realistic, reliable work and other advantages, it can be used as a teaching model, can also be used as a hydraulic experimental element for experimental demonstration.
3. The pressure reducing valve adopts the combined installation method of elastic pins, and five positioning and installation elastic pins are installed behind it, when using, all the pins should be aligned with the jack, and then pushed into parallel and reliably installed in the required parts.
4. When using, it should be noted that P1 hole is the oil inlet hole, P2 hole is the oil outlet hole, and L hole is the oil drain hole. Misconnection is not allowed, and when installing the oil circuit, the oil plug in the oil hole should be dialed out first.
5. When dismantling, the force should be applied to the valve body, and the pressure reducing valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with a pressure reducing valve.
8. Please refer to textbooks and other hydraulic books for its working principle.
11) Two-position two-way solenoid directional valve
Function introduction:
1. Rated flow: 10l min working pressure: 0--10 MPa rated voltage: 220V
2. The structure of the two-position two-way electromagnetic reversing valve refers to the domestic 22D-25 D type two-position two-way electromagnetic reversing valve, and its valve body and valve body installation plate are refined by imported transparent plexiglass materials, and the valve core and push rod are made of No. 45 medium carbon steel materials. The baffle and end cover are made of aluminum alloy material, and the MFJ1-3 220V solenoid valve is assembled with standard parts such as springs, oil joints, and sealing rings.
3. The two-position two-way solenoid reversing valve adopts the combined installation method of elastic pins, and the valve body is installed on the plexiglass installation baseplate. There are a total of 12 positioning and mounting elastic pins for installation, all of which should be aligned with the jack and then pushed parallel into the desired position for reliable mounting. (Elastic prongs are equipped with spare parts).
4. When using, it should be noted that the P hole is the oil inlet hole, and the A hole is the oil outlet hole. When installing the oil circuit, the oil plug in the oil hole should be pulled out first, and it should be controlled after connecting with the electrical control panel with the universal connection line of the solenoid valve.
5. When dismantling, the force should be applied to the valve body, and the two-position two-way electromagnetic reversing valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with a two-position two-way electromagnetic reversing valve.
8. Please refer to textbooks and other hydraulic books for its working principle.
12) Two-position four-way solenoid directional valve
Function introduction:
1. Rated flow: 10l min working pressure: 0--10 MPa rated voltage: 220V
2. The structure of the two-position four-way electromagnetic reversing valve refers to the domestic 24E-25 D type two-position four-way electromagnetic reversing valve, and its valve body and valve body installation base plate are refined by imported transparent plexiglass materials, and the valve core and push rod are made of No. 45 medium carbon steel materials. The baffle and end cover are made of aluminum alloy material, and the MFJ1-3 220V solenoid valve is assembled with standard parts such as springs, oil joints, and sealing rings.
3. The two-position four-way solenoid directional valve adopts the combined installation method of elastic pins, and the valve body is installed on the plexiglass installation baseplate. There are a total of 12 elastic pins for positioning and mounting on the mounting baseplate, and when in use, all the pins should be aligned with the jacks, and then pushed in parallel to the desired place for reliable installation. (Elastic prongs are equipped with spare parts).
4. When using, it should be noted that the P hole is the oil inlet hole, the O hole is the oil outlet hole, and the A and B oil holes are connected to the working oil circuit (such as: oil cylinder). When installing the oil circuit, the oil plug in the oil hole should be pulled out first, and it should be controlled after connecting with the electrical control panel with the universal connection line of the solenoid valve. (The electromagnet is energized when commutation I is stopped, and the electromagnet loses power when it stops or commutation is reversed II).
5. When dismantling, the force should be applied to the valve body, and the two-position four-way electromagnetic reversing valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the plugs.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with two two-position four-way solenoid reversing valves.
8. Please refer to textbooks and other hydraulic books for its working principle.
13) Three-position four-way solenoid directional valve
Function introduction:
1. Rated flow: 10l min working pressure: 0--10mpa
Rated voltage: 220V
2. The structure of the three-position four-way electromagnetic reversing valve refers to the domestic 34E-25 B type three-position four-way electromagnetic reversing valve, and its valve body and valve body installation plate are refined from imported transparent plexiglass materials, and the valve core, push rod and positioning sleeve are made of No. 45 medium carbon steel material. The baffle is made of aluminum alloy material, and the MFJ1-3 220V solenoid valve (two) is used, which is assembled with standard parts such as springs, oil joints, sealing rings, etc., through which the structure and operation process of the valve core, spring, oil hole and so on can be clearly observed.
3. The three-position four-way solenoid reversing valve adopts the combined installation method of elastic pins, and the valve body is installed on the plexiglass installation baseplate. There are a total of fifteen positioning and mounting elastic pins on the mounting baseplate, and when in use, all the pins should be aligned with the jacks, and then pushed in parallel to the required parts for reliable installation. (Elastic prongs are equipped with spare parts).
4. When using, it should be noted that the P hole is the oil inlet hole, the O hole is the oil return hole, and the A and B oil holes are connected to the working oil circuit (such as: oil cylinder). When installing the oil circuit, the oil plug in the oil hole should be pulled out first, and it should be controlled after connecting with the electrical control panel with the universal connection line of the solenoid valve. It has three working states: stop, commutation I, and commutation II.
5. When dismantling, the force should be applied to the valve body, and the three-position four-way electromagnetic reversing valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with an O-type, H-type, P-type, and M-type three-position four-way solenoid reversing valve.
8. Please refer to textbooks and other hydraulic books for its working principle.
14) Two-position four-way stroke reversing valve
Function introduction:
1. Technical parameters
Working pressure: 0--10MPa Rated Flow: 10L Min
2. The structure of the two-position four-way stroke reversing valve refers to the domestic 24C-25B two-position four-way stroke reversing valve, and its valve body, front end cover and screw cover are refined from imported transparent plexiglass materials, and the valve core and push rod are made of No. 45 medium carbon steel. It is assembled with standard parts such as springs, oil joints, sealing rings, hexagon screws, etc., through which the structure of the valve core, springs, oil holes and its commutation process can be clearly observed.
3. The two-position four-way stroke valve adopts the combined installation mode of elastic pins, and six positioning and installation elastic pins are installed behind it, and when installing, the corresponding installed cylinder ejector rod stroke should be in the maximum position outside, and the push rod of the stroke reversing valve is relatively installed, and then the push rod is adjusted so that the stroke reversing valve is in the open position (spring compression position).
4. When using, it should be noted that the P hole is the oil inlet hole, the O hole is the oil return hole, and the A and B oil holes are connected to the working oil circuit (such as: oil cylinder). When installing the oil circuit, the oil plug in the oil hole should be removed first.
5. When dismantling, the force should be applied to the valve body, and the two-position four-way stroke reversing valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the plugs.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with a two-position four-way stroke reversing valve.
8. Please refer to textbooks and other hydraulic books for its working principle.
15) Three-position five-way manual reversing valve
Function introduction:
1. Technical parameters
Working pressure: 0--10MPa Rated Flow: 10L Min
2. The structure of the three-position five-way manual reversing valve refers to the domestic 34S-63B three-position five-way manual reversing valve, and its valve body, front end cover and rear screw cover are refined by imported transparent plexiglass materials, and the valve core and push rod are made of No. 45 medium carbon steel material. It is assembled with standard parts such as springs, oil joints, sealing rings, hexagon screws, etc., through which the structure of the valve core, springs, oil holes and its commutation process can be clearly observed.
3. The three-position five-way manual reversing valve adopts the combined installation method of elastic plugs, and there are multiple positioning and installation elastic pins installed behind it, when installing, all the plugs should be aligned with the jack, and then pushed in parallel, and reliably installed in the required position.
4. When using, it should be noted that the P hole is the oil inlet hole, the O hole is the oil return hole (two), and the A and B oil holes are connected to the working oil circuit (such as: oil cylinder). When installing the oil circuit, the oil plug in the oil hole should be pulled out first, and the opening of the operating handle can adjust the size of the flow rate when working.
5. When dismantling, the force should be applied to the valve body, and the three-position five-way manual reversing valve should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins.
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with a three-position five-way manual reversing valve.
8. Please refer to textbooks and other hydraulic books for its working principle.
16) Pressure relay
Function introduction:
1. Technical parameters
Working pressure: 0--10MPa Contact Current: 08 a
2. The shell and bottom plate cover of the pressure relay are made of imported transparent plexiglass material, the valve core is made of No. 45 medium carbon steel material, and the micro motion opening and closing and signal socket are installed. It is assembled with standard parts such as springs, oil joints, sealing rings, steel balls, hexagon screws, etc., through which the valve core, springs, steel balls and other structures and their movement process and electric shock under the action of pressure oil can be clearly observed.
3. The pressure relay adopts the combined installation method of elastic pins, and four positioning and installation elastic pins are installed behind it, and when installing, all the pins should be aligned with the jack, and then pushed in parallel, and reliably installed in the required position.
4. When in use: the K hole is the oil inlet hole, which is connected to the controlled oil circuit. The signal socket outputs the signal on and off (that is, when the pressure of the oil circuit is lower than the adjusted pressure, the switch is disconnected, and when the adjusted pressure is exceeded, the switch is turned on), and the normally open start plug of the control panel is connected with the plug connection wire, which can control the corresponding electromagnetic reversing valve.
5. When dismantling, the force should be applied to the valve body, and the pressure relay should be dialed out in parallel, and it is forbidden to pull in the oblique direction to prevent damage to the pins. (Elastic prongs are equipped with spare parts).
6. After use, the oil inside should be poured out, and the oil inlet and outlet holes should be plugged with a rubber plug to clean the oil stains and keep them clean.
7. Each equipment is equipped with a pressure relay.
8. Please refer to textbooks and other hydraulic books for its working principle.
6. Configuration list
7. Precautions:
1. Due to the particularity of the structure and appearance of the experimental components, it is necessary to handle it steadily and gently to prevent collision during the experiment.
2. Before doing experiments, you must be familiar with the working principle of components; Master the combination method and confirm that the installation of the loop test is correct before the pressurization test can be carried out; Forcible disassembly is prohibited; It is forbidden to forcibly twist the handle of various elements.
3. It is forbidden to start with load (that is, loosen the relief valve) to avoid safety accidents.
4. Students should not adjust the pressure too high (about 0.) when doing experiments4～0.6mpa）。
5. Because of the transparent material of acrylic, it belongs to plastic products. The degree of temperature resistance is limited, so the solenoid valve in this system should not be used for a long time (about 40 minutes), and the solenoid valve should be powered off or used intermittently when not in use.
6. This system pays attention to the transparency of the valve body, focuses on the circuit demonstration, enhances the students' hands-on ability, and does not do accurate experiments and scientific research. Hard seals account for most of the system, and the sealing performance is poor, so it is normal for some valves to have a small amount of leakage.
7. Before using this experimental system, students must understand the hydraulic test guidelines, understand the operating procedures of this experimental system, and carry out the experiment under the guidance of the experimental teacher, and do not blindly carry out the experiment.
8. During the experiment, if the student finds any problem in the circuit, the pump should be turned off immediately, and the experiment can be re-conducted only when the circuit is pressurized.
9. After the experiment is completed, the components should be cleaned up; Pay attention to the maintenance of components and the cleanliness of the laboratory bench.