Dedicated piston assembly for reciprocating piston type gas compressor

A technology of gas compressors and reciprocating pistons, applied in variable capacity pump components, liquid variable capacity machines, pump components, etc., can solve problems such as not being able to significantly improve machine operating efficiency, failure, increased frictional power consumption, and heat generation

Inactive Publication Date: 2013-09-04
安庆市佰联无油压缩机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a new machine is used, the general efficiency is acceptable, but with the operation of the machine, the piston ring is gradually worn, so the opening of the piston ring will gradually become larger, and its sealing effect will gradually deteriorate, causing the machine efficiency to gradually decrease until it fails completely
In particular, for oil-free high-pressure compressors, small changes in piston ring openings have a significant impact on the sealing effect. Even if a large number of piston ring groups are designed and the slits are used staggered from each other, it will not be obvious Improve the operating efficiency of the entire machine, but greatly increase friction power consumption and heat generation

Method used

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  • Dedicated piston assembly for reciprocating piston type gas compressor
  • Dedicated piston assembly for reciprocating piston type gas compressor
  • Dedicated piston assembly for reciprocating piston type gas compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 , figure 2 , image 3 , Figure 4 It can be seen that the piston assembly dedicated to the reciprocating piston gas compressor of the present invention includes a cylinder 1 and a matching piston 2, and the two ends of the piston 2 are respectively equipped with an upper guide ring 10 and a lower guide ring 20, which is characterized in that: The piston 2 is provided with a plurality of annular grooves 21, and a piston ring 5 sealingly connected with the cylinder 1 is arranged in the annular grooves 21, and at least one sealing ring 4 is arranged inside the piston ring 5 in each annular groove 21.

[0018] The upper guide ring 10 and the lower guide ring 20 keep the piston 2 and the cylinder 1 in a coaxial state all the time. Both the piston 2 and the cylinder 1 are made of metal, and they can move relative to each other and are in sealing contact through a plurality of piston rings 5 ​​. The piston ring 5 is made of non-metallic material, which can...

Embodiment 2

[0025] Such as figure 1 , 2 , 3, 4 It can be seen that the difference between this embodiment and Embodiment 1 is that, in the case of a larger bore of the cylinder 1, the sealing ring 4 is one, and its cross-sectional shape and inner diameter are the same as those of the piston ring 5 and the annular groove 21. Matching, its sealing performance is better and easy to assemble. In this embodiment, the cross-sectional shape of the sealing ring 4 is a rectangle with rounded corners.

[0026] The special piston assembly for the reciprocating piston type gas compressor of the present invention can remarkably improve the sealing effect and service life due to the structural change. After testing, it is found that setting 3-4 annular grooves 21 can seal the high-pressure gas, which greatly reduces the manufacturing cost and operating cost of the machine. After 2000h, 15MPa life test, it is proved that its life is far longer than the 1200h stipulated in the compressor standard of o...

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PUM

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Abstract

The invention provides a dedicated piston assembly for a reciprocating piston type gas compressor. The dedicated piston assembly for the reciprocating piston type gas compressor is good in sealing effect, long in service life, low in cost, capable of being used under the working conditions of oil lubrication and oil-free lubrication, and particularly suitable for the field of medium pressure and high pressure. The dedicated piston assembly for the reciprocating piston type gas compressor comprises an air cylinder and a piston matched with the air cylinder. An upper guide ring and a lower guide ring are installed at the two ends of the piston respectively. Multiple circular grooves are formed in the piston. Piston rings connected with the air cylinder in a sealing mode are arranged in the circular grooves. At least one seal ring is arranged on the inner side of each piston ring in each circular groove. At least one gas guide hole which makes the root portion of each circular groove be communicated with an inner cavity of the air cylinder is correspondingly formed in each circular groove in the piston. The gas guide holes are multiple in number and distributed along each circular groove at an equal distance. Each piston ring is of a spring structure, and the number of total coils of each spring is greater than one.

Description

technical field [0001] The invention relates to a reciprocating piston gas compressor, in particular to a special piston assembly for an oil-free lubricated reciprocating piston gas compressor. Background technique [0002] A large number of various piston gas compressors are used in many industries of the national economy. The efficiency of the compressor is directly related to the energy consumption. closely related. The traditional piston structure is: several piston ring grooves are designed on the piston, and piston rings with openings are assembled in the ring grooves. When a new machine is used, the general efficiency is acceptable, but with the operation of the machine, the piston ring is gradually worn, so the opening of the piston ring will gradually become larger, and its sealing effect will gradually deteriorate, causing the machine efficiency to gradually decrease until it fails completely . In particular, for oil-free high-pressure compressors, small changes...

Claims

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Application Information

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IPC IPC(8): F04B39/00
Inventor 汪潜王高平
Owner 安庆市佰联无油压缩机有限公司
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