Lubricating grease injected adjustable sealing ring

A sealing ring and grease technology, which is applied to engine components, piston rings, mechanical equipment, etc., can solve the problems of inability to adjust the sealing performance of the sealing ring, the reduction of the volume efficiency of the hydraulic cylinder, and the inability of the hydraulic cylinder to work, so as to achieve the ability to adjust the sealing performance. , long service life, anti-twist effect

Inactive Publication Date: 2016-12-21
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the use of the sealing ring, as the working time prolongs, the wear and tear will increase, the leakage will gradually increase, and the volumetric efficiency of the hydraulic cylinder will also decrease. After a certain period of use, the sealing performance of the sealing ring cannot be adjusted, and the sealing ring must be replaced. , otherwise the hydraulic cylinder cannot work
When replacing the sealing ring of a large or extra-large hydraulic cylinder, heavy objects such as the cylinder head and piston rod must be lifted by lifting equipment, which takes a long time to complete, and the assembly and disassembly costs are high

Method used

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  • Lubricating grease injected adjustable sealing ring
  • Lubricating grease injected adjustable sealing ring
  • Lubricating grease injected adjustable sealing ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An adjustable seal ring filled with grease. Such as figure 1 and figure 2 As shown, the adjustable sealing ring is an integral body composed of a hollow O-ring 1 and an annular base 2 , and the outer wall of the hollow O-ring 1 is in close contact with the inner wall of the annular base 2 . The outer wall of the annular base 2 is provided with a grease injection hole 3 to the cavity of the hollow O-ring 1 , and the outer wall of the annular base 2 is provided with two positioning pins 4 .

[0025] Such as image 3 As shown, the cross-sectional shape of the hollow O-ring 1 is composed of an approximate circular tube with the center line of the adjustable sealing ring as the axis of symmetry, and the approximate circular tube is composed of O 1 The approximate inner circle with the center as the center and the O 1 It is surrounded by an approximate outer circle with the same center. The approximate inner circle is given by R 1 It is formed by connecting the inner c...

Embodiment 2

[0031] An adjustable seal ring filled with grease. Except following technical parameter, all the other are with embodiment 1.

[0032] The inclination angle α=20°~25° of the expanding paraboloid;

[0033] The parabolic opening width b on the outer wall of the annular base 2 2 =0.35~0.4B, the length L of the projection of the parabola on the horizontal plane on the outer wall of the annular base 2 along the axis of symmetry=0.35~0.4B.

[0034] Compared with the prior art, this specific embodiment has the following advantages:

[0035](1) The outer ring surface of the annular base 2 in this specific embodiment has a grease injection through hole 3, and the grease injection through hole 3 is cut into a gradually expanding paraboloid along the parabola of the orifice and along the outside of the parabola, that is, gradually The expanded paraboloid is composed of a variable cross-section parabola, and the inclination angle of the variable cross-section is α=15~25°; the parabol...

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Abstract

The invention relates to a lubricating grease injected adjustable sealing ring. According to the technical scheme, the adjustable sealing ring is an integration composed of a hollow O-shaped ring (1) and an annular base (2); a grease filling through hole (3) is formed from the outer wall of the annular base (2) to a cavity of the hollow O-shaped ring (1); and the outer wall of the annular base (2) is provided with two locating pins (4). The cross-section shape of the hollow O-shaped ring (1) is an approximate circular tube with the central line of the adjustable sealing ring as the symmetry axis. The approximate circular tube is defined by an approximate inner circle and an approximate outer circle which are concentric. The cross-section shape of the annular base (2) is a rectangle with the central line of the adjustable sealing ring as the symmetry axis. The grease filling through hole (3) is cut into a divergent paraboloid along an orifice parabola inwards and along the outer side of the parabola. A cut paraboloid body is a connection hole plug of the grease filling through hole (3). The lubricating grease injected adjustable sealing ring has the characteristics of being long in service life, high in efficiency, high in reliability, low in friction, high in frequency response and adjustable in sealing performance.

Description

technical field [0001] The invention belongs to the technical field of sealing rings. Specifically relates to an adjustable sealing ring with lubricating grease injected inside. Background technique [0002] Hydraulic cylinders are widely used in the field of hydraulic technology, whether in small hydraulic systems or in extra-large and heavy-duty hydraulic systems. In order to make the hydraulic cylinder work normally and ensure a certain volumetric efficiency, a sealing ring is generally installed to prevent hydraulic oil from leaking. According to the structural shape, the sealing ring is divided into O-type, Y-type, combined seal and so on. Installing the sealing ring into the hydraulic cylinder can effectively prevent oil leakage, while maintaining low friction, and the response speed can also meet the working requirements. [0003] During the use of the sealing ring, as the working time prolongs, the wear and tear will increase, the leakage will gradually increase, ...

Claims

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Application Information

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IPC IPC(8): F16J9/20F16J9/28
CPCF16J9/20F16J9/28
Inventor 郭媛吴凛蒋俊陈新元邢晓文湛从昌
Owner WUHAN UNIV OF SCI & TECH
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