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Piston sealing structure of vertical non-lubrication piston compressor

A sealing structure and non-lubricating technology, which is applied in the direction of mechanical equipment, variable displacement pump components, machines/engines, etc., can solve the problems of increasing manufacturing difficulty and manufacturing cost

Inactive Publication Date: 2009-07-22
KAIFENG AIR SEPARATION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the manufacturing difficulty and manufacturing cost are greatly increased
Due to manufacturing reasons, these two structures are rarely used in domestic manufacturers

Method used

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  • Piston sealing structure of vertical non-lubrication piston compressor
  • Piston sealing structure of vertical non-lubrication piston compressor
  • Piston sealing structure of vertical non-lubrication piston compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] like Figure 4 As shown, embodiment 1: the present invention includes a guide ring 5 and a piston ring 3 sleeved on the piston 4, and is characterized in that a guide ring 5 is arranged at the active end of the piston 4, and on the outer ring of the guide ring 5 Machining with labyrinth slots. Being provided with a guide ring at the active end of the piston means that a guide ring is sleeved on the upper peripheral surface of the cylindrical piston 4 .

[0021] The thickness of the guide ring 5 is greater than that of conventional guide rings. Between the guide ring 5 and the cylinder 2, there is a thermal expansion gap to ensure that the guide ring not only acts as a guide but also plays a throttling role, that is, to ensure that the guide ring maintains a small gap with the cylinder under working conditions. The guide ring 5 and the piston ring 3 are filled with polytetrafluoroethylene materials. The guide ring 5 is an integral shrink-fit guide ring. The labyrinth...

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PUM

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Abstract

The invention relates to a vertical unlubricating piston compressor piston sealing structure used in a vertical unlubricating piston compressor. The piston sealing structure comprises a guide ring and a piston ring which are sheathed on a piston. The piston sealing structure is characterized in that: an action end of the piston is provided with the guide ring, an outer ring of the guide ring is machined with a labyrinth groove, the service life of the piston ring of the prior art is usually about half a year during use, and the longest service life does not exceed one year. When the piston sealing structure is used in the vertical unlubricating piston compressor, the service life of the piston ring usually can be increased by 30%-50%, and the service life of some piston rings even can be increased by more than 100%, thus the piston sealing structure has the advantages of prolonging the service life of the piston ring and ensuring long-term and safe operation of the compressor.

Description

technical field [0001] The invention relates to a vertical non-lubricating piston compressor piston sealing structure used in the vertical non-lubricating piston compressor. Background technique [0002] The piston and the cylinder cooperate to form a compression volume, and the seal between the piston and the cylinder is particularly important. Its sealing, durability, reliability, and frictional power consumption all need to be fully considered. In the conventional design of vertical non-lubricated piston compressors, a guide ring (integral type) and several piston rings (open type) are usually arranged on the piston, such as figure 1 shown. The guide ring plays the role of centering, and the piston ring plays the role of sealing. The number of piston rings used depends on the sealing pressure difference of the piston. The structural design is relatively simple, and the alignment requirement between the cylinder and the piston is relatively low, so the manufacturing cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/02F04B53/14
Inventor 应家聪吕颢高燕李淑英
Owner KAIFENG AIR SEPARATION GROUP
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