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Energy-saving lifting system of combined cylinder

A hydraulic system and cylinder technology, applied in the direction of fluid pressure actuating system components, servo motor components, fluid pressure actuating devices, etc. The effect of small throttling loss and long life

Inactive Publication Date: 2019-01-22
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an energy-saving lifting system for combined cylinders aiming at the partial load and out-of-synchronization problems existing in the double-cylinder lifting of construction machinery

Method used

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  • Energy-saving lifting system of combined cylinder
  • Energy-saving lifting system of combined cylinder
  • Energy-saving lifting system of combined cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like Figure 4-5 As shown, the combined cylinder energy-saving lifting system includes a mechanical device and a hydraulic system, wherein the mechanical device includes: a boom (13), a frame (14), and the tail of the boom is hinged on the frame; the hydraulic system includes: a pump motor (1), motor (2), the first two two-way reversing valve (3), the second two two-way reversing valve (4), the third two two-way reversing valve (5), the fourth four two-position two-way reversing valve (6), fifth two-position two-way reversing valve (7), sixth two-position two-way reversing valve (8), combination cylinder (9), accumulator (10), Oil tank (11); the combined cylinder piston rod earring is hinged at the middle of the boom, and the combined cylinder body earring is hinged on the vehicle frame; in the hydraulic system, the motor is mechanically connected to the pump motor, and the first oil port of the pump motor is connected to the fuel tank. The second oil port of the pump ...

Embodiment 2

[0040] like Figure 6-7 As shown, the combined cylinder energy-saving lifting system includes a mechanical device and a hydraulic system, wherein the mechanical device includes: a stick 15, a bucket 16, and the bucket is hinged at the end of the stick; the hydraulic system includes: a pump motor 1, a motor 2, a Ⅰ two-position two-way directional control valve 3, second two-position two-way directional control valve 4, third two-position two-way directional control valve 5, fourth two-position two-way directional control valve 6, fifth two-position two-way directional control valve Directional valve 7, combination cylinder 9, accumulator 10, fuel tank 11, power element 12; combination cylinder body earrings are hinged on the upper part of the stick, and combination cylinder piston rod earrings are hinged on the bucket. In the hydraulic system: the motor is mechanically connected with the pump motor and the power element coaxially, the first oil port of the pump motor is connect...

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Abstract

The invention provides an energy-saving lifting system of a combined cylinder, aiming to solve the problems of eccentric loading and asynchronism in double-cylinder lifting of engineering machinery. The combined cylinder for the system comprises at least two hydraulic cylinders in welding, the hydraulic cylinder bodies are welded, the tops of piston rods of the hydraulic cylinders are welded and share the same lug, rod cavities of the hydraulic cylinders are communicated with each other, and thus, synchronous lifting without eccentric loading of the combined cylinder can be realized. The energy-saving lifting system of the combined cylinder has the advantages of realizing synchronous lifting without eccentric loading, having high energy utilization rate and low cost, needing no pilot oil sources, being simple and reliable, and the like.

Description

technical field [0001] The invention belongs to the technical field of hydraulic systems, and in particular relates to a combined cylinder energy-saving lifting system. Background technique [0002] At present, construction machinery such as excavators and loaders mostly use hydraulic systems to drive the boom, and use the boom to rise and fall to perform operations. Among them, the actuator is a hydraulic cylinder. During the working process, that is, when the double cylinders of construction machinery are lifted, the left and right sides of the boom are caused by the asynchrony of the cylinders on both sides, so that the hinge of the boom and the upper frame, the hinge of the piston rod of the hydraulic cylinder and the boom, and the hydraulic cylinder The pressure distribution on both sides of the joint between the body and the frame is uneven, causing wear and even deformation of the joint, which seriously affects the normal operation of the construction machinery. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/22F15B21/14F15B13/06
CPCF15B11/22F15B13/06F15B21/14
Inventor 权龙吕涵葛磊李泽鹏
Owner TAIYUAN UNIV OF TECH
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