Auxiliary piston method for sealing oil cylinder

A technology for assisting pistons and oil cylinders, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of easy cracks in the sealing ring, large pressure difference of the oil cylinder sealing ring, and accelerated wear speed, so as to save sealing costs and reduce Effect of front and rear pressure difference, reducing wear rate

Inactive Publication Date: 2009-12-16
吴建初
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the current sealing form is that when the oil cylinder is in motion, due to the large pressure difference between the two ends of the oil cylinder sealing ring, the sealing ring is prone to cracks, and the wear speed is accelerated, thereby reducing the life of the oil cylinder.

Method used

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  • Auxiliary piston method for sealing oil cylinder
  • Auxiliary piston method for sealing oil cylinder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Combine below figure 1 The specific implementation mode when the present invention is used as oil cylinder piston rod seal will be further described in detail.

[0015] A floating seal 8 is installed on the oil cylinder guide sleeve 2 near the front chamber 9 of the oil cylinder, and an oil groove 5 is processed at the oil cylinder guide sleeve 2 near the floating seal 8, and an outer cylinder body 10 is installed on the outer cylindrical surface of the cylinder barrel 4 of the oil cylinder. 10 is installed with an outer piston 11, and a sealing ring 12 is installed on the outer piston 11. The outer piston 11 can reciprocate for a certain distance in the axial direction in the outer cylinder body 10. One end of the outer cylinder body 10 has an oil pipe 7 through the oil circuit 6 and The oil groove 5 communicates with each other, and the other end of the outer cylinder body 10 has an oil pipe 13 to communicate with the oil cylinder rear cavity 16 .

[0016] When worki...

Embodiment 2

[0018] Combine below figure 2 Further detailed description will be given when the present invention is used as oil cylinder piston seal.

[0019] A front piston ring 17 and a rear piston ring 21 are respectively installed at both ends of the oil cylinder piston 15. The oil cylinder piston 15 is partially processed with an oil groove 18 between the front piston ring 17 and the piston seal 14, and the oil cylinder piston 15 is interposed between the rear piston ring 21 and the piston seal 14. The part between the piston seals 14 is also processed with an oil groove 20, and an inner cylinder body 23 is processed inside the shaft center of the piston rod 1 close to the 16 end of the cylinder rear cavity, and an inner piston 25 is installed in the inner cylinder body 23, and a sealing ring is installed on the inner piston 25 24. The inner piston 25 can reciprocate for a certain distance in the axial direction in the inner cylinder 23. The two ends of the inner cylinder 23 have oil...

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Abstract

The invention discloses an auxiliary piston method for sealing an oil cylinder. The end of a guide sleeve of the oil cylinder, which is adjacent to the front chamber of the oil cylinder, is provided with a floating seal by installation, an external cylinder body and an external piston are installed on the external cylndrical surface of an oil cylinder barrel of the oil cylinder, the external piston can make reciprocating motion in certain distances along an axial direction in the external cylinder body, one end of the external cylinder body is provided with an oil pipe communicated with an oil groove by an oil passage, and the other end of the external cylinder body is provided with an oil pipe communicated with the rear chamber of the oil cylinder. A front and a rear piston rings are respectively installed on both ends of the piston, an internal cylinder body is processed in the axle center of the piston rod which is adjacent to the end of the rear chamber of the oil cylinder, an inner piston ring is installed in the internal cylinder body and can make reciprocating motion in certain distances along an axial direction in the internal cylinder body, and both ends of the internal cylinder body are provided with oil passages respectively communicated with the two oil grooves. The auxiliary piston method for sealing the oil cylinder enables the front and rear pressure differential of each soft seal ring to be far lower than the traditional oil cylinder by the displacement of an internal piston and an external piston during the motion of the oil cylinder, thereby slowing down the abrasion of each soft seal ring and prolonging the service life of the oil cylinder.

Description

technical field [0001] The invention relates to a sealing method of a hydraulic oil cylinder, which is an auxiliary piston type sealing method of the oil cylinder. Background technique [0002] As the executive element of the hydraulic system, the hydraulic cylinder is the main failure form of the cylinder seal failure. The biggest disadvantage of the current sealing form is that when the oil cylinder is in motion, due to the large pressure difference between the two ends of the oil cylinder sealing ring, the sealing ring is prone to cracks, and the wear speed is accelerated, thereby reducing the life of the oil cylinder. [0003] Therefore, it has become very important to find a sealing method that can effectively reduce the pressure difference between the two ends of the sealing ring when the oil cylinder operates, thereby prolonging the service life of the oil cylinder. Contents of the invention [0004] The purpose of the present invention is to provide a sealing meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16
Inventor 吴建初
Owner 吴建初
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