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A multi-stage compound telescopic hydraulic cylinder for heavy load

A telescopic hydraulic cylinder, heavy load technology, applied in the direction of fluid pressure actuation device, mechanical equipment, etc., can solve the problems of slow extension speed, affecting lifting work efficiency, vibration impact, etc. Difficulty in processing and manufacturing, the effect of eliminating synchronization errors

Active Publication Date: 2021-02-09
BEIJING INST OF SPECIALIZED MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, large-scale heavy-duty lifting equipment mostly adopts traditional plunger or piston-type multi-stage hydraulic cylinders. The plungers or pistons at each level need to be extended step by step, and the extension speed is relatively slow.
In addition, the plungers or piston rods at all levels need to be changed. When changing the level, the effective working area of ​​the hydraulic cylinder changes sharply, resulting in a sudden change in the system pressure and cylinder movement speed, which in turn causes collisions and vibration shocks, which not only affects the reliability of mechanical equipment, but also Affect lifting work efficiency
In response to the needs of hydraulic elevators and high-altitude operating vehicles, synchronous telescopic multi-stage hydraulic cylinders have appeared in recent years. Although this type of hydraulic cylinder has the advantages of fast movement speed and no impact of changing stages, under heavy loads, the hydraulic cylinder The pressure in the cavity is relatively high, and the external dimensions of the cylinder are relatively large, so it is not suitable for heavy-duty lifting occasions where the installation space is limited

Method used

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  • A multi-stage compound telescopic hydraulic cylinder for heavy load
  • A multi-stage compound telescopic hydraulic cylinder for heavy load
  • A multi-stage compound telescopic hydraulic cylinder for heavy load

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Embodiment Construction

[0024] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] like figure 1 As shown, the present invention provides a multi-stage compound telescopic hydraulic cylinder suitable for heavy loads, including a cylinder barrel 1, a first-stage cylinder 2, a second-stage cylinder 3, a third-stage cylinder 4, a cylinder head 5, a cylinder bottom 6 and different specifications O-rings, gray rings, guide rings, dust-proof rings and oil cups, of which:

[0026] like figure 1 As shown, the cylinder 1, the first-stage cylinder 2, the second-stage cylinder 3 and the third-stage cylinder 4 are sequentially nested from outside to inside. The first dust-proof ring 10, the second gray ring 11, and the second guide ring 12 are installed in sequence, and are sealed and supported with the...

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Abstract

The invention relates to a multi-stage composite telescopic hydraulic cylinder for heavy loads, and relates to the technical field of fluid transmission. Through the matching design between multi-stage cylinders, the telescopic speed of the heavy-load multi-stage hydraulic cylinders can be obviously improved, the grade-changing impact frequency is reduced, and the problems that an existing composite telescopic hydraulic cylinder is difficult to process and manufacture, cannot be assembled and cannot be filled with oil in advance are solved; and in addition, the synchronous error generated in the reciprocating motion of the hydraulic cylinder can be eliminated, machining and manufacturing are simple, and installation and maintenance are easy.

Description

technical field [0001] The invention relates to the technical field of fluid transmission, in particular to a multi-stage composite telescopic hydraulic cylinder for heavy loads. Background technique [0002] The hydraulic cylinder is an important reciprocating motion actuator in the hydraulic system. Compared with single-stage hydraulic cylinders, multi-stage telescopic hydraulic cylinders have the advantages of shorter initial installation distance and longer stroke, and are widely used in large heavy-duty lifting equipment such as dump trucks and cranes. At present, large-scale heavy-duty lifting equipment mostly adopts traditional plunger or piston-type multi-stage hydraulic cylinders. The plungers or pistons at each level need to be extended step by step, and the extension speed is relatively slow. In addition, the plungers or piston rods at all levels need to be changed. When changing the level, the effective working area of ​​the hydraulic cylinder changes sharply, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/16F15B15/20
CPCF15B15/1423F15B15/1442F15B15/1471F15B15/16F15B2215/30
Inventor 张振华王飞李春萍陈亮杨凯强曹秀荣
Owner BEIJING INST OF SPECIALIZED MACHINERY
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