Is the piston working on a hydrogen compressor?

There are two types of hydrogen compressors, one of which is a piston type hydrogen compressor. This type of hydrogen compressor works in a cyclic motion to achieve the task of compressing hydrogen.

Main：

• Type and selection of hydrogen compressor

• Piston movement of a hydrogen compressor

• Basic structure of piston hydrogen compressor

Type and selection of hydrogen compressor

Hydrogen compressors can be divided into two types according to the principle: volumetric type and speed type. Volumetric type is the most common type. The volumetric compressor is divided into two types: reciprocating piston type and rotary type.

1.The reciprocating piston type changes the workload of the gas by alternating the pistons of the cylinder. Piston compressors have a long history and mature production technology.

2. Rotary compressors include rotary vane compressors (slider) and screw compressors. Most air conditioners made in China use today's rotary compressors. Screw compressors are mainly used in large refrigeration equipment and some large refrigeration equipment. There are many screw compressors in shopping malls and office buildings.

Like other gases, hydrogen can be pressurized in reciprocating or radial compressors to meet technical requirements. For common applications, the type of compression should be determined based on hydrogen flow and pressure increase. 

Piston movement of a hydrogen compressor

The movement of the piston of a hydrogen compressor makes the compressor a compressor that uses the reciprocating movement of the piston to generate pressure and feed gas. Positive displacement compressors are also called "reciprocating piston compressors" or "reciprocating compressors". After starting the engine, the crankshaft will rotate. Due to the delivery of the connecting rod, the piston moves back and forth, which regularly changes the workload created by the inner wall of the cylinder, the cylinder head and the top of the piston. As the piston moves out of the cylinder head, the displacement of the cylinder gradually increases. At this point, the steam pool enters the cylinder until it pushes the suction valve along the suction pipe, and the displacement reaches the maximum, and the suction valve is closed. When the piston moves in the opposite direction, the displacement of the cylinder decreases and the air pressure increases. When the cylinder pressure reaches and slightly exceeds the outlet pressure, the exhaust valve opens and the gas remains in the cylinder until the piston moves to its final position. The valve is closed. When the piston moves in the opposite direction, repeat the above process. In other words, the crankshaft rotates once and the piston reciprocates, and the intake, compression, and exhaust processes from the cylinder are sequentially performed. That is, the service cycle is completed.

Basic structure of piston hydrogen compressor

• Piston type hydrogen compressor is mainly composed of crankcase, crankshaft, connecting rod, piston set, valve, shaft seal and oil pump. Energy control device, oil circulation system, etc.

  
  

• Shell: including cylinder block and shell, usually nodular cast iron. It is the main body that bears the weight of the cylinder liner, crankshaft and all other components and ensures the correct relative position of these components. The cylinder has a cylinder liner design, and is installed in the hole of the cylinder block cylinder liner for maintenance or replacement when the cylinder liner is worn. Therefore, the structure is simple and easy to maintain.

  
  

• Crankshaft: The crankshaft is one of the main components of the alternative cooling compressor, which can provide the full power of the compressor. The main function is to convert the rotary motion of the engine into the reciprocating linear motion of the piston through the connecting rod. As the crankshaft moves, tension, compression, shear, bending and torsional loads are applied alternately. Operating conditions are difficult, requiring sufficient strength and stiffness and the wear resistance of the main shaft and connecting rod.

  
  

• Connecting rod: The connecting rod is a part of the connecting rod between the crankshaft and the piston. The connecting rod converts the rotary motion of the crankshaft into the reciprocating motion of the piston, and transmits the force to the piston to act on the steam pool. The connecting rod includes a connecting rod housing, a small-end connecting rod bushing, a large-end connecting rod bearing bushing and a connecting rod screw.

  
  

• Piston kit: Piston kit is a general term for piston, piston pin and piston ring. The piston group is driven by a connecting rod to perform a reciprocating linear movement in the cylinder together with the cylinder, thereby forming a variable amount of work to perform the processes of absorption, compression and contraction.

  
  

• Steam valve: The steam valve is an important part of the compressor and one of the wearing parts. Its quality and working quality directly affect the steam flow, power loss and compressor performance. The steam valve includes an intake valve and an exhaust valve. The piston moves up and down once, and the intake and exhaust valves open and close at once, so we control the compressor and perform 4 intake, compression, and contraction operations.

  
  

• Shaft seal: The function of the shaft seal can prevent refrigerant vapor from leaking along the extended end of the crankshaft, or allow outside air to flow in when the crankcase pressure is lower than the pressure. Waiting, therefore, the shaft seal should have good sealing and safety, simple design, true disassembly and assembly and a specific service life.

  
  

• Energy management device: when changing the cooling heat load in the refrigeration system, the cooling capacity also changes accordingly, so the cooling capacity of the compressor must be adjusted according to the requirements. The cooling capacity of the compressor is adjusted using an energy controller, and the compressor energy controller is actually a polarization controller. It has the ability to start the compressor under idle or low load and adjust the compressor's cooling capacity.

As with oxygen and nitrogen compressors, choosing the type of compressor that suits you can increase work efficiency. However, hydrogen piston compressors are not necessarily suitable for your business. More information can be found on the homepage.