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Assembly type piston ring

A piston ring and assembled technology, which is applied in the field of compressors, can solve problems such as large gaps, leakage, and inability to obtain initial elasticity, and achieve the effect of improving sealing performance and good sealing performance

Inactive Publication Date: 2018-03-23
SICHUAN HUIQUAN CANNED FOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Regarding the sealing of the piston ring, if the outer edge of the piston ring is to closely fit the cylinder mirror surface, the piston ring must obtain a certain effective elasticity, so the piston ring must be made with a cut; if the piston ring does not have a cut, it cannot obtain the initial Elasticity, the piston ring does not necessarily stick to the mirror surface of the cylinder. When the compressor compresses the gas, the high-pressure gas may leak from the gap between the piston ring and the cylinder.
When the piston ring with notch is working normally, due to the notch of the piston ring, the gap at the notch of the piston ring will become larger and larger during long-term use, which will affect the airtightness of the compressor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An assembled piston ring includes a main piston ring and an inner auxiliary piston ring that are used in combination and are of equal height. The ring bodies of the main piston ring and the inner auxiliary piston ring are provided with broken grooves, and the main piston ring, A gap is formed on the ring body of the inner auxiliary piston ring, so as to facilitate the installation of the main piston ring and the inner auxiliary piston ring, and the gaps on the ring body of the main piston ring and the ring body of the inner auxiliary piston ring are misaligned with each other during installation , To ensure that the sealing performance of the piston ring will not be affected by the gap on the ring body. Since the main piston ring and the inner auxiliary piston ring are assembled by a split structure, the stability of the splicing of the main piston ring and the inner auxiliary piston ring needs to be considered. For this reason, the first groove on the inner wall of the ...

Embodiment 2

[0024] On the basis of the first embodiment, the shape of the longitudinal section of the annular umbrella-shaped elastic element includes a rectangular parallelepiped and an isosceles trapezoid arranged in order from the inside to the outside. The bottom corner of the isosceles trapezoid is close to the side of the rectangular parallelepiped and the bottom side of the isosceles trapezoid. The length of is greater than the width of the rectangular parallelepiped, and the bottom corners of the isosceles trapezoid are respectively inserted into the grooves of the main piston ring and the inner and secondary piston rings.

Embodiment 3

[0026] On the basis of the first or second embodiment, the main piston ring, the inner auxiliary piston ring and the annular umbrella-shaped elastic member and the annular elastic member are installed to form a first gap, a second gap, and a third gap.

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Abstract

The invention discloses an assembly type piston ring, and belongs to the technical field of piston rings. The aim is to provide a combined type compressor piston ring, the piston ring is convenientlyinstalled in an assembly manner, and the connecting stability and the sealing performance of the installed piston ring are better. The piston ring comprises a main piston ring body and an inner auxiliary piston ring body which are used in a combined manner and are equal in height, a first groove of the inner wall of the main piston ring body and a protruding ring on the outer wall of the inner auxiliary piston ring body, a groove structure is formed, and an annular umbrella-shaped elastic piece is installed in the groove structure; and a second groove in the main piston ring body and a third groove in the inner auxiliary piston ring body correspondingly form a space, and the annular shaped elastic piece is installed in the space. By means of the assembly type piston ring, a notch gap can be effectively blocked relatively effectively, and the sealing performance of the piston ring is improved.

Description

Technical field [0001] The invention relates to the technical field of compressors, in particular to a piston ring structure in a compressor. Background technique [0002] In reciprocating compressors, a piston ring is usually installed on the piston, and the gap between the piston and the cylinder mirror is sealed by the piston ring, which mainly plays a role of sealing. Existing piston rings mainly suffer from two problems: too fast wear and poor sealing performance. [0003] Regarding the problem of excessive wear of the piston ring, to a certain extent, it is determined by the improper selection of the piston ring. For the same metal material to be worn, different media have different wear factors for the same formula filled PTFE ring. ; For the same medium, different grinding metal materials have different wear factors for the same formula filled PTFE ring. [0004] Regarding the sealing problem of the piston ring, in order for the outer edge of the piston ring to closely fit ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B39/00
CPCF04B39/0005F04B39/00
Inventor 罗小东
Owner SICHUAN HUIQUAN CANNED FOOD