Large-volume leather bag type constant-pressure energy accumulator and application thereof

A constant-pressure accumulator and large-capacity technology, which is applied in accumulator devices, actuator accumulators, fluid pressure actuation devices, etc. There are many components in the device system, and it is impossible to apply to construction machinery, etc., so as to reduce the requirements of the bladder material, the system pressure fluctuation is small, and the weight is reduced.

Active Publication Date: 2019-10-25
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the current constant pressure accumulator (system) schemes still have the following problems: (1) the diaphragm type constant pressure accumulator can only slightly reduce the "dead volume" problem; (2) the diaphragm type constant pressure accumulator uses Diaphragm structure, the volume is too small to be suitable for construction machinery with large flow; (3) Gravity-loaded accumulators are bulky and unresponsive, so they are rarely used at present; (4) The constant pressure accumulator system has many components , the structure is more complex

Method used

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  • Large-volume leather bag type constant-pressure energy accumulator and application thereof
  • Large-volume leather bag type constant-pressure energy accumulator and application thereof
  • Large-volume leather bag type constant-pressure energy accumulator and application thereof

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Experimental program
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Embodiment 1

[0045] Such as figure 1 As shown, this embodiment provides a large-capacity bladder-type constant pressure accumulator, including a housing 1 and a bladder 2 placed in the housing 1, a variable-area piston 4, a floating piston 5, a piston 8, and a flange 11; Wherein, the floating piston 5 is sleeved on the piston rod of the variable-area piston 4, and the bottom end of the piston rod of the variable-area piston 4 is connected with the piston 8, and a through hole is opened on the central axis of the variable-area piston 4 and the piston 8, and the through hole is connected with the piston 8. An inflation valve 3 is connected between the bladders 2, the inflation valve 3 is threadedly connected to the through hole, the bottom of the through hole is connected with a cover plate 10, the piston 8 is provided with a one-way valve I6 and a one-way valve II7, the flange 11 and the housing 1 Bottom inner wall connection.

[0046]Specifically, the variable-area piston 4 has an arc-sha...

Embodiment 2

[0054] Such as image 3 As shown, a working method of the large-capacity bladder type constant pressure accumulator as described in Embodiment 1, the hydraulic excavator arm energy recovery system is used as an example to demonstrate the operation of the new large-capacity bladder type constant pressure accumulator application.

[0055] The working principle of the hydraulic excavator boom energy recovery system is as follows: when the boom is lowered, the high-pressure oil in the rodless chamber of the boom cylinder enters the accumulator and temporarily stores it to complete the energy recovery and storage process; when necessary, it is stored in the accumulator The oil is output to other circuits in a constant pressure manner to complete the reuse of the recovered energy. This reciprocating cycle achieves the purpose of energy saving. The specific process is as follows:

[0056] When the boom is lowered, the rodless cavity of the boom cylinder 14 supplies oil to the accumu...

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Abstract

The invention relates to a large-volume leather bag type constant-pressure energy accumulator and application thereof. The large-volume leather bag type constant-pressure energy accumulator comprisesa shell and further comprises a leather bag, a variable area piston, a floating piston, a piston and a flange which are arranged in the shell. The floating piston sleeves a piston rod of the variablearea piston. The bottom end of the piston rod of the variable area piston is connected with the piston, and a through hole is formed in the center axes of the variable area piston and the piston, an inflation valve is connected between the through hole and the leather bag, the bottom of the through hole is connected with a cover plate, the piston is provided with a one-way valve I and a one-way valve II, and the flange is connected with the inner wall of the bottom of the shell. The novel large-volume leather bag type constant-pressure energy accumulator has the advantages that leakage is notlikely to happen, the service life is long, inertia is small, the response is sensitive, and the applicable volume range is wide; and the novel large-volume leather bag type constant-pressure energy accumulator can be widely applicable to various hydraulic systems.

Description

technical field [0001] The invention relates to a large-capacity bladder type constant-pressure accumulator and its application, in particular to a large-capacity bladder constant-pressure hydraulic accumulator, which is suitable for hydraulic systems of various machines and belongs to the technical field of accumulators. Background technique [0002] With the continuous development of the hydraulic system of construction machinery, problems such as impact and pressure pulsation in the hydraulic system are becoming more and more serious. At the same time, due to the requirements of environmental protection and energy saving, the hydraulic system also requires energy recovery. In order to adapt to the development of hydraulic systems, various types of accumulators are used more and more widely. Accumulators have become very important energy storage components in hydraulic systems, and play an important role in absorbing pressure pulsations and energy recovery. . [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B1/24
CPCF15B1/24F15B2201/312F15B2201/4155F15B2201/205F15B2201/3152F15B2201/31F15B2201/32F15B1/08F15B1/165Y02E60/16
Inventor 万丽荣于正苗刘文婷马玉华孙志远田明倩
Owner SHANDONG UNIV OF SCI & TECH
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