Hello everyone, I am Mr. He, not He Gong, the key points of the common equipment of the second construction electromechanical, and I have taken good notes.
Classification and performance of pumps
General engineering equipment refers to mechanical equipment with strong versatility and wide range of uses.
Generally, it refers to fan equipment, pump equipment, compressor equipment, conveying equipment, etc.
First, the classification of pumps
Centrifugal pumpsHigh efficiency, simple structure, the widest range of application.
2.According to the working principle and structural form of the pump, it can be divided into:Positive displacement pumps, impeller pumps
1) Positive displacement pumps.
According to the different ways of movement of moving parts, it is divided intoReciprocating pumps and swing pumps
Reciprocating pumps(piston pumps, piston pumps).
Slewing pumps(gear pumps, screw pumps, vane pumps).
2) Impeller pump.
According to the different characteristics of the impeller and flow channel structure of the pump, it is divided into:Centrifugal pumps, axial flow pumps and vortex pumpsWait.
3.According to the conveying medium, it is divided into: clean water pump, impurity pump, corrosion-resistant pump, etc.
4.According to the suction method, it is divided into: single suction pump and double suction pump.
5.According to the number of impellers, it is divided into: single-stage pump and multi-stage pump.
Second, the performance of the pump
The performance parameters of the pump are mainly as follows:Flow, head, power, efficiency, speedWait.
For example, a 30-storey (98m high) high-rise building should have a head of more than 130m for its fire pump.
Classification and performance of wind turbines
First, the classification of fans
1.According to the direction of gas flow inside the rotating impeller, it can be divided into:Centrifugationtype fan,Axial flowtype fan,Mixed streamstype fan,
2.According to the structural form, it can be divided into:Single-stageFans,Multi-levelFans,
3.According to the different divisions of exhaust pressure, it can be divided into:Ventilators, blowers, compressors
Second, the performance of the fan
Its main performance parameters are: flow rate (also known as air volume).Full wind pressure, dynamic pressure, static pressure, power, efficiency, speed,Specific speedWait.
Classification and performance of compressors
First, the classification of compressors
1.According to the different gases compressed, compressors can be divided into:aircompressors,Oxygencompressors,Ammoniacompressors,Natural gascompressors,
2.According to the way of compressed gas, it can be divided into:Volumetric typecompressors andPoweredcompressors,
Positive displacement compressors:Reciprocatingcompressors,Slewingcompressors,
Power compressors:Axial flowcompressors,Centrifugalcompressors andFrancis typecompressors,
Second, the performance of the compressor
Volume, flow,Suction pressure, exhaust pressure, work efficiency,NoiseWait.
Summary] Classification of pump fan compressors.
Summary] performance parameters of pumps, fans and compressors.
Classification of continuous conveying equipment
According to whether there are traction parts (chains, ropes, belts) to divide, can be divided into:
There is scratchingConveying equipment for traction parts, such as:BeltConveyors,Plate typeConveyors,ScraperConveyors,ElevatemachineAerial cablewayWait.
Memory: Lifting the sluggish (belt) board hanging (scraping) piece (rack).
FlexibleConveying equipment for traction parts, such as:Screw conveyors, roller conveyors, vibrating conveyors, pneumatic conveyorsWait.