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Long-service-life piston head

A piston head and long-life technology, which is applied in the direction of liquid variable displacement machinery, variable displacement pump components, machines/engines, etc., can solve the problems of inconvenient installation and disassembly, short service life, etc., to reduce the failure rate and make up for Abrasion, the effect of prolonging the service life

Inactive Publication Date: 2014-05-21
CHENGDU DAMO PETROLEUM MACHINERY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of inconvenient installation and disassembly of the piston ring on the piston head and short service life in the prior art, the present invention provides a long-life piston head

Method used

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  • Long-service-life piston head
  • Long-service-life piston head
  • Long-service-life piston head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] like figure 1 , figure 2 and image 3 , a long-life piston head, including a mandrel 1 and a piston ring 4, and also includes a locking end cap 6, an elastic ring 3 and a plurality of piston ring retaining rings 2 each provided with a central hole, the mandrel 1 being one end A stepped shaft with an external thread is provided, and the piston ring retaining rings 2 are sequentially installed on the mandrel, and a ring-shaped piston ring installation groove 9 perpendicular to the axis of the mandrel 1 is formed between two adjacent piston ring retaining rings 2 , each piston ring mounting groove 9 is provided with an elastic ring 3, and each elastic ring 3 is provided with a piston ring 4, and a gap is provided on the piston ring 4, and the locking end cap 6 and the mandrel The external thread section of 1 becomes threaded connection.

[0024] Specifically, the arranged piston ring 4 is in contact with the inner wall of the cylinder to form a sealing surface to form ...

Embodiment 2

[0026] This embodiment is further improved on the basis of embodiment 1, as figure 1 , figure 2 and image 3 , the cross-section of the piston ring mounting groove 9 is T-shaped, and its inner width is greater than the outer width, and the cross-section of the piston ring 4 is also T-shaped with an inner width greater than the outer width. There is also a sliding gap 10 with a width in the range of 2 mm-5 mm between the inner and outer ends of 9 .

[0027] The setting of the shape of the piston ring 4 and the piston ring mounting groove 9 is convenient for increasing the compressive stress on the inner wall of the cylinder on the outside of the piston ring 4 by increasing the force-bearing area inside the piston ring 4, even if the height is greater than that of the outside of the piston ring 4. Elastic ring 3, so that under the condition of ensuring the sealing performance of piston ring 4, it is convenient to choose elastic ring 3 that is easy to deform, which not only fa...

Embodiment 3

[0030] This embodiment is further improved on the basis of embodiment 1, as figure 1 , figure 2 and image 3 , also includes a disc-shaped guide ring seat 8 and a guide ring 5 fixed on the mandrel 1, and an annular groove is arranged on the outer side of the guide ring seat 8, and the guide ring 5 is located in the groove. The set guide ring 5 is used to guide the movement track of the mandrel 1 relative to the cylinder, which is conducive to uniform force on the circumferential direction of the piston ring 4 and prolongs the service life of the piston ring 4 .

[0031]In order to facilitate the installation of the guide ring 5 on the mandrel 1, the guide ring seat 8 is provided with a central hole, the guide ring seat 8 is installed on the mandrel 1, and the groove is connected with the end surface of the guide ring seat 8. The above setting also facilitates setting a piston ring 4 between the guide ring seat 8 and the piston ring retaining ring 2 close to it, so that it i...

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Abstract

The invention discloses a long-service-life piston head. The long-service-life piston head comprises a mandrel and piston rings and further comprises a locking end cap, elastic rings and a plurality of piston ring check rings respectively provided with a center hole. The mandrel is in the shape of a stepped shaft with external threads arranged at one end, the piston ring check rings are sequentially arranged on the mandrel in a penetrating mode, an annular piston ring mounting groove perpendicular to the axis of the mandrel is formed between every two adjacent piston ring check rings, each piston ring mounting groove is sleeved with one elastic ring, each elastic ring is sleeved with one piston ring, gaps are formed in the piston rings, and the locking end cap is connected with the external thread segment of the mandrel through the threads. The long-service-life piston head is simple in structure, the piston rings can be installed on and detached from the piston head conveniently, meanwhile, the sensitiveness of the air tightness of compression space of an air cylinder to the abrasion amount of the piston rings is weakened, the service cycle of the piston rings can be prolonged easily, and the fault rate of a compressor is reduced.

Description

technical field [0001] The invention relates to the field of piston compressor equipment, in particular to a long-life piston head. Background technique [0002] Because piston compressors can produce different models such as low pressure, medium pressure, high pressure, and ultra-high pressure, it is convenient to select compressors with different exhaust pressures according to needs. Compared with rotary compressors, they also have high efficiency, small size, and easy The installation and exhaust volume can be adjusted and selected in a wide range, and are widely used in the petrochemical industry. [0003] The key components in the piston compressor are the cylinder and the piston head. The cooperation between the two during the operation of the piston compressor will directly affect the efficiency and failure rate of the compressor. In the prior art, the piston head is composed of a mandrel and a piston ring fixed on the mandrel, and the piston ring is in contact with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B39/00
Inventor 贺昶明
Owner CHENGDU DAMO PETROLEUM MACHINERY GRP
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