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Flow changing mechanism of load-sensitive pump

A technology of load sensitive pump and variable mechanism, which is applied in the direction of mechanical equipment, fluid pressure actuating device, servo meter circuit, etc., can solve the problems of pressure and flow fluctuation, unstable transition process, etc., achieve dynamic performance optimization and improve dynamic performance Effect

Active Publication Date: 2020-09-25
BEIHANG UNIV
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  • Abstract
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Problems solved by technology

[0003] However, the structure of the variable mechanism of the traditional load-sensing pump is relatively simple, and the flow of the pump outlet can only be adjusted accordingly according to the pressure of the load, and the static design is only carried out for the stable operating point of the P-Q curve.
During the change of pressure and flow, there may be an unstable transition process, resulting in pressure and flow fluctuations

Method used

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  • Flow changing mechanism of load-sensitive pump
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  • Flow changing mechanism of load-sensitive pump

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Embodiment Construction

[0023] The present disclosure will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only parts related to the present disclosure are shown in the drawings.

[0024] It should be noted that, in the case of no conflict, the implementation modes and the features in the implementation modes in the present disclosure can be combined with each other. The present disclosure will be described in detail below with reference to the drawings and embodiments.

[0025] The variable mechanism is used to control the displacement of the load sensing pump, see figure 1 The inclination angle of the swash plate, when the variable cylinder moves to the right, the swash plate inclination angle decreases and the displacement decreases; on the co...

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Abstract

The invention provides a flow changing mechanism of a load-sensitive pump. The flow changing mechanism comprises a flow changing piston cylinder, a piston, a piston rod and a reset spring, wherein anin-cylinder space is formed in the flow changing piston cylinder, the piston is arranged in the in-cylinder space in a sliding mode in the axial direction and divides the in-cylinder space into a first cavity and a second cavity; one end of the piston rod is fixed to the piston and longitudinally penetrates through the second cavity in the axial direction, and the other end of the piston rod extends out of the flow changing piston cylinder to be connected with a swash plate; the piston rod is provided with the reset spring in a sleeved mode, one end of the reset spring abuts against the piston, and the other end of the reset spring abuts against the inner wall of the end part of the flow changing piston cylinder; and a plurality of damping hole sets are formed in the side wall of the flowchanging piston cylinder at intervals in the axial direction, each damping hole set comprises at least one damping hole, one end of each damping hole communicates with the in-cylinder space, and the other end of each damping hole communicates with a hydraulic oil way. According to the flow changing mechanism of the load-sensitive pump, by means of the principle of adjustable damping configuration,the dynamic performance of the flow changing mechanism is optimized, and the dynamic performance of the load-sensitive pump can be favorably improved.

Description

technical field [0001] The present disclosure relates to the technical field of hydraulic control, in particular to a variable mechanism of a load sensitive pump. Background technique [0002] Load sensing technology was first proposed in the industrial field, which effectively saved energy and reduced energy consumption; later it was also maturely applied in the civil field, such as automobiles, home appliances and other equipment, which has great benefits for the economy and environmental protection of human society. [0003] However, the structure of the variable mechanism of the traditional load-sensing pump is relatively simple, which can only adjust the flow of the pump outlet according to the pressure of the load, and only statically design the stable working point of the P-Q curve. During the change of pressure and flow, there may be an unstable transition process, resulting in pressure and flow fluctuations. Contents of the invention [0004] In order to solve or...

Claims

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Application Information

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IPC IPC(8): F15B13/02F15B13/12F15B21/00
CPCF15B13/02F15B13/0417F15B13/12F15B21/001F15B2211/205F15B2211/651
Inventor 尚耀星张昊焦宗夏吴帅于天
Owner BEIHANG UNIV
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