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A guide system variable clearance sealed hydraulic cylinder

A guiding system and variable gap technology, which is applied to the sealing of the engine, the fluid pressure actuator, the engine components, etc., can solve the problems of increased energy consumption, complex structure, increased cost, etc., to achieve reduced friction and simple overall structure , Improve the effect of sealing

Inactive Publication Date: 2017-04-12
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of guide sleeve adds a set of oil supply device, the structure is complicated, the cost is increased, and the energy consumption is increased.

Method used

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  • A guide system variable clearance sealed hydraulic cylinder
  • A guide system variable clearance sealed hydraulic cylinder
  • A guide system variable clearance sealed hydraulic cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The utility model relates to a variable gap sealed hydraulic cylinder of a guiding system. The structure of this embodiment is as figure 1 As shown: the outer end surface of the gland 12 is installed close to the inner end surface of the end cover 10, the outer end surface of the guide sleeve 4 is installed close to the gland 12, the piston 16 is movably installed in the cylinder body 14, and the piston rod 1 is coaxially grounded. Pass through the guide sleeve 4, the gland 12 and the end cap 10. The shape of the guide sleeve 4 is a cylindrical boss-type integral body composed of a large cylinder and a small cylinder. The guide sleeve 4 is provided with a central through hole, and the inner wall of the central through hole is evenly opened with 2 to 3 pressure equalizers. Slot 2. The cylindrical surface of the large cylinder of the guide sleeve 4 is equipped with the first O-type seal 3, such as figure 2 with image 3 As shown, an arc-shaped notch 17 is opened on t...

Embodiment 2

[0034] The utility model relates to a variable gap sealed hydraulic cylinder of a guiding system. Except following technical parameter, all the other are with embodiment 1:

[0035] The length L of the large cylinder of the guide sleeve 4 1 =(0.7~1)d, the length L of the small cylinder of the guide sleeve 4 2 =(0.7~1)d, d is the diameter of the piston rod.

[0036] This embodiment has the following advantages:

[0037] 1. The static pressure oil chamber 5 of this specific embodiment is composed of the annular surface of the large cylinder of the guide sleeve 4, the small cylindrical surface of the guide sleeve 4, the inner end surface of the gland 12 and the inner wall of the cylinder body 14. The hydraulic oil is directly Enter the static pressure oil chamber 5 from the arc-shaped gap 17 opened on the outer circle of the first O-shaped seal 3, abandoning the traditional oil supply device, so the overall structure is simple and easy to maintain.

[0038] 2. The small cylin...

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PUM

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Abstract

The invention relates to a variable-gap sealing type hydraulic cylinder of a guide system. According to the technical scheme, a guide sleeve (4) is composed of a large cylinder and a small cylinder as a whole. Two to three uniform pressure grooves (2) are evenly formed in the inner wall of the guide sleeve (4). An arc gap (17) is formed in the outer circle of a first O-shaped sealing element (3) of the guide sleeve (4). The depth of the arc of the arc gap (17) is 0.5-0.6 of the diameter of the cross section of the first O-shaped sealing element (3). The radius R of the arc of the arc gap (17) is 1 / 2-2 / 3 of the diameter of the cross section of the first O-shaped sealing element (3). A second O-shaped sealing element (6) is arranged on the end face of the small cylinder of the guide sleeve (4). An outer annular oil leakage groove (13) is formed in the cylindrical surface of a gland (12). An inner annular oil leakage groove (11) is formed in the inner wall of the gland (12). An oil leakage channel (9) formed in the bottom of the outer annular oil leakage groove (13) is communicated with the inner annular oil leakage groove (11) and oil leakage holes (8) in a cylinder body (14). The variable-gap sealing type hydraulic cylinder is characterized in that the structure is simple, maintenance is convenient, friction force is small, the frequency response speed is high, the reliability is high, the service life is long, and the leakage amount is small.

Description

technical field [0001] The invention belongs to the technical field of variable clearance sealed hydraulic cylinders. In particular, it relates to a guide system variable gap sealed hydraulic cylinder. Background technique [0002] One of the key elements of a hydraulic servo system is the servo hydraulic cylinder. Due to the special working conditions, the servo hydraulic cylinder is required to have low friction, high frequency response, high reliability and long life, etc., to meet the static and dynamic performance requirements of the hydraulic servo system. Therefore, the sealing form and material selection between the piston rod and the guide sleeve of the servo hydraulic cylinder are very important. It is an important factor restricting the rapid and high-frequency response and life of the servo hydraulic cylinder. [0003] At present, the seal between the piston rod and the guide sleeve of the servo hydraulic cylinder is a composite sealing ring composed of a non-m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/14F15B15/20F16J15/18
CPCF15B15/1423F15B15/1461F15B2215/30
Inventor 湛从昌文小莉陈奎生周娇陈新元
Owner WUHAN UNIV OF SCI & TECH