Does the piston work in the hydrogen compressor?

There are two typesHydrogen compressorOne of them is a piston compressor hydrogen. This type of hydrogen compressor realizes the task of compressing hydrogen with cyclic motion engineering.

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Type and choice of hydrogen compressor

Piston movement of hydrogen compressor

Basic structure of piston hydrogen compressor

Type and choice of hydrogen compressor

Hydrogen compressors can be divided into two types based on the principle: volume type and speed type. Volumetric is the most common type. The positive displacement compressors are divided into two types: reciprocating piston type and rotary type.

1. The reciprocating piston type changes the working volume of the gas through the reciprocating movement of the piston in the cylinder; the piston compressor has a long history and mature production technology.

2. Rotary compressors include vane (slider) rotary compressors and screw compressors. Most of the air conditioners produced in China currently use rotary compressors; screw compressors are mainly used for large refrigeration equipment, and now some large ones also have many screw compressors in shopping malls and office buildings.

Like other gases, hydrogen can be pressurized through reciprocating or centrifugal compressors to meet process requirements. In each typical application, the type of compression should be increased according to the flow and pressure of hydrogen. machine.

Piston movement of hydrogen compressor

The piston movement of the hydrogen compressor makes the compressor rely on the reciprocating movement of the piston to pressurize and deliver gas to the compressor. It is a positive displacement compressor, also known as \"reciprocating piston compressor\" or \"reciprocating compressor\". After the motor is started, the crankshaft rotates. Through the connecting rod, when the piston reciprocates, and the working volume formed by the cylinder, cylinder head and the inner wall of the top surface of the piston periodically changing. When the piston starts to move from the cylinder head, the working volume of the cylinder gradually increases. At this time, the steam body pushes the intake valve along the intake pipe and enters the cylinder until the working volume becomes maximum and the intake valve closes. When the piston in the opposite direction moves, the working volume in the cylinder decreases and the gas pressure increases. When the cylinder reaches a pressure and is slightly higher than the exhaust pressure, the exhaust valve opens and the gas leaves the cylinder until the piston moves to the limit position. The valve is closed. The above process repeats the movement of the piston in the opposite direction. In short, the crankshaft rotates once, the piston reciprocates once, and the intake, compression and exhaust processes are implemented in sequence in the cylinder, that is, one work cycle is completed.

Basic structure of piston hydrogen compressor

The piston compressor hydrogen is mainly composed of body, crankshaft, connecting rod, piston base, valve, shaft seal, oil pump, energy regulating device, oil circulation system, etc.

The main body: including the cylinder block and crankcase, usually made of high-strength gray cast iron. It is the body to support the weight of the cylinder liner, crankshaft linkage and all other components, and to ensure the correct relative position between the components. The cylinder adopts a cylinder liner structure, and the cylinder liner hole is installed on the cylinder block, when the cylinder liner is worn out, to facilitate maintenance or replacement. Therefore, the structure is simple and maintenance is convenient.

Rising crankshaft: The crankshaft is a piston refrigeration compressor that provides one of the main components of the compressor's full power. Its main function is to change the rotary motion of the motor to the reciprocating linear motion of the piston through the connecting rod. When the crankshaft moves, it undergoes alternating tensile and compressive composite loads, shearing, bending, and torsion. The working conditions are very demanding, it needs to have sufficient strength and rigidity as well as wear resistance of the main journal and crank pin.

Connecting rod: The connecting rod is the crankshaft and the piston, which converts the crankshaft into the reciprocating rotational movement of the piston, and transmits power to the connecting part where the piston works between the steam main body. The connecting rod includes a connecting rod mechanism, a connecting rod small end bushing, a connecting rod big end bearing bushing and a connecting rod bolt.

Piston group: Piston assembly is the general term for piston, piston pin and piston ring. The piston group is driven by the connecting rod to make the reciprocating linear movement in the cylinder, thus forming a variable working volume with the cylinder to realize the process of suction, compression and exhaust.

Steam valve: The steam valve is an important part of the compressor and is a vulnerable part. Its quality and work quality directly affect the compressor's steam output, power loss and operational feasibility. The steam valve includes an intake valve and an exhaust valve. The piston reciprocates up and down once, and the suction and discharge valves open and close once, thereby controlling the compressor and completing the four working processes of suction, compression and exhaust.

Shaft seal: The function of the shaft seal is to prevent the refrigerant vapor from leaking from the extended end of the crankshaft, or to prevent the pressure in the crankcase from being lower than the atmospheric pressure when the external air leaks. Therefore, the shaft seal should have good sealing performance and safety reliability, and have a simple structure, convenient assembly and disassembly, and have a certain service life.

Energy adjustment device: In the refrigeration system, as the cooling heat load changes, the cooling capacity also changes. Therefore, the cooling capacity of the compressor should also be adjusted as needed. The adjustment of the refrigeration capacity of the compressor is realized by an energy adjustment device, which is actually a displacement adjustment device. It has two functions, one is to realize the no-load start of the compressor or start under a small load state, and the other is to adjust the refrigeration capacity of the compressor.

与Oxygen compressor和Nitrogen compressorWhen you choose the right type of compressor for you, your task may be more effective. But piston hydrogen compressor may not be suitable for your business, you can learn more about it on our webpage.