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Hydraulic system hydraulic cylinder structure meeting higher frequency response requirements and suitable for limited installation space

A technology of installation space and hydraulic system, which is applied in the field of hydraulic cylinders, can solve the problems of increasing the difficulty of component manufacturing, achieve optimal performance and cost, avoid external oil circuit design, and avoid the effect of installation design

Active Publication Date: 2019-12-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cylinder-valve integration or valve-cylinder integration increases the difficulty of component manufacturing, and neither can be combined with the current best valve (or cylinder) to achieve the optimal combination of valve and cylinder

Method used

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  • Hydraulic system hydraulic cylinder structure meeting higher frequency response requirements and suitable for limited installation space
  • Hydraulic system hydraulic cylinder structure meeting higher frequency response requirements and suitable for limited installation space
  • Hydraulic system hydraulic cylinder structure meeting higher frequency response requirements and suitable for limited installation space

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, the specific implementation of the present invention comprises piston block 1.1, piston rod 1.2, bearing sleeve 8, end cap 10, cylinder barrel 12; The two ends of cylinder barrel 12 are all equipped with annular end cap 10, and end cap 10 passes through the second The bolt 6 and the second washer 7 are fixedly installed on the end of the cylinder 12. There is a first sealing ring 13 between the cylinder 12 and the end cover 10 and is sealed by the first sealing ring 13. The two ends of the piston block 1.1 are fixed coaxially. Connect the piston rod 1.2, the piston block 1.1 is installed in the cylinder barrel 12, the dynamic seal between the piston 1.1 and the cylinder barrel 12 adopts a gap seal, and the piston 1.1 is provided with a pressure equalizing groove. The piston rod 1.2 is installed in the end cover 10, and the piston blo...

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Abstract

The invention discloses a hydraulic system hydraulic cylinder structure meeting higher frequency response requirements and suitable for limited installation space. By integrating a hydraulic cylinderand a valve block, a cylinder barrel of the hydraulic cylinder is integrated with the valve block, so that the problems of connection, positioning and end surface matching of the hydraulic cylinder and the valve block are eliminated, and a servo valve with determined performance is flexibly matched; and a linear bearing and a piston rod are in contact in the form of a rolling pair. According to the hydraulic cylinder structure, the sliding friction force between the piston rod and the bearing can be eliminated, and the starting pressure of the hydraulic cylinder is reduced, so that the movingfrequency of a hydraulic system is increased, and the higher frequency response requirements compared to a traditional contact-type supporting mode are met; the hydraulic cylinder is integrated with the valve block, so that the size of the hydraulic cylinder is reduced, and the hydraulic cylinder is suitable for occasions with limited space; and the performance of the servo valve is selectable compared with the integration of the hydraulic cylinder and the servo valve, so that both low cost and good performance are achieved.

Description

technical field [0001] The invention relates to a hydraulic cylinder, in particular to a hydraulic cylinder used in a hydraulic system with high frequency response requirements and limited installation space. Background technique [0002] A hydraulic cylinder is a device that converts liquid pressure energy into linear motion of a piston rod, and is an important actuator in a hydraulic system. The hydraulic system has the characteristics of high power density, and is often used in occasions with large load force, but its movement frequency is low, and it often cannot meet some higher frequency requirements (such as greater than 200-300Hz) in the workplace. The response frequency of the hydraulic cylinder and the response frequency of the servo valve are two important factors that limit the frequency increase of the hydraulic system. [0003] The factors that affect the response frequency of the hydraulic cylinder include the natural frequency of the hydraulic cylinder, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/14F15B15/20F15B15/28F15B19/00
CPCF15B15/14F15B15/1423F15B15/1457F15B15/202F15B15/2815F15B19/00F15B2211/857
Inventor 周华罗贵福于瑞付波
Owner ZHEJIANG UNIV
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