A plunger combined digital variable pump

A digital variable, combined technology, used in pump control, liquid variable capacity machinery, machines/engines, etc., can solve the problem that the frequency response is difficult to meet the working requirements, and achieve small system pressure loss, simple structure, and overcome frequency Low response effect

Active Publication Date: 2017-06-23
王林翔
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large-flow proportional servo systems, due to the large hydraulic force, the control of proportional valves or servo valves needs to be realized by multi-stage pilot valves, and its frequency response is difficult to meet the actual work requirements.

Method used

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  • A plunger combined digital variable pump

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Experimental program
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Embodiment Construction

[0025] The design idea of ​​the present invention is illustrated below through a schematic diagram.

[0026] Such as figure 1 As shown, the plunger combined digital variable hydraulic pump of the present invention consists of seven two-position two-way cut-off solenoid valves 1, seven oil suction one-way poppet valves 2, seven oil pressure one-way valves 3, seven plungers 4 , and the plunger return spring 5, the eccentric wheel 6 and the pump body 7 are composed.

[0027] The structure of the whole system is: all the plungers are driven by the eccentric wheel against the force of the return spring, the oil suction port of each plunger is connected with the oil tank, and the connection mode of the oil discharge port of the plunger is determined according to the actual needs. The working volume corresponding to each plunger is connected to the oil tank by a two-position two-way stop type solenoid valve.

[0028] When the digital variable pump is working, the motor drives the e...

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Abstract

The invention discloses a plunger combined digital variable pump. It consists of multiple plungers, multiple oil suction one-way valves, multiple oil discharge one-way valves, and multiple two-position two-way electromagnetic stop valves. The oil suction port of each plunger is connected with the oil tank through the oil suction check valve; the oil pressure port of each plunger is connected with the high pressure oil circuit through the oil pressure check valve; The two-way cut-off solenoid valve is bypassed; the actual displacement of the digital variable pump is obtained by superimposing the displacements of all normal oil-discharging plungers; the displacement control is adjusted by the solenoid valve to adjust the displacement corresponding to a single plunger Realized, so that the displacement change of the digital variable pump can respond very quickly to the input of the electric signal, thereby meeting the requirements of high-frequency response control. The invention can effectively solve the problems of large pressure loss and low frequency response in the large-flow servo and proportional electro-hydraulic control system, and achieve a large energy-saving effect at the same time.

Description

technical field [0001] The invention relates to a plunger combined digital variable hydraulic pump. More precisely, it relates to a digital control for realizing the instantaneous displacement of a hydraulic pump by utilizing the oil discharge combination control of multiple plungers. Background technique [0002] The current electro-hydraulic control system widely uses components such as proportional valves or servo valves to achieve servo and proportional control, but such technical solutions have obvious shortcomings: [0003] 1. Large pressure loss and low energy utilization efficiency. Since the basic principle of the valve control scheme is to use the principle of throttling and speed regulation, its disadvantages are throttling loss, large energy consumption, and serious system heating, resulting in instability or failure of the hydraulic system. Especially for the large flow proportional servo system, the pressure loss is particularly serious. [0004] 2. Low freq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/22
Inventor 王林翔
Owner 王林翔
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