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Digital distribution constant flow radial piston pump

A constant flow, radial column technology, used in pumps, multi-cylinder pumps, liquid variable capacity machines, etc., can solve problems such as flow pulsation, reduce pulsation, reduce body vibration, and achieve constant flow output.

Inactive Publication Date: 2017-04-19
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device can only be applied to hydraulic motors, and the simple PWM duty ratio control will cause certain flow pulsation

Method used

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  • Digital distribution constant flow radial piston pump
  • Digital distribution constant flow radial piston pump
  • Digital distribution constant flow radial piston pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, this embodiment includes: two-position three-way high-speed switch valves 1-5, load 6, controller 7, plunger cavity 9-13, absolute value angle encoder 8 and distribution fluid 14, wherein: each two-position three-way The high-speed switch valves 1-5 are respectively connected with the corresponding plunger cavity, the distribution fluid 14, and the controller 7.

[0025] The P port of the two-position three-way high-speed switching valve is connected to the load 6, the A port is connected to the plunger cavity through the distribution fluid 14, and the T port is connected to the fuel tank. The first two-position three-way high-speed switch valve 1 is connected to the first plunger cavity 9 (I), the second two-position three-way high-speed switch valve 2 is connected to the second plunger cavity 10 (II), and the third two-position three-way The high-speed switch valve 3 is connected with the third plunger cavity 11 (Ⅲ), the fourth two-position...

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Abstract

Provided is a digital flow-distribution constant-flow radial plunger pump. The digital flow-distribution constant-flow radial plunger pump comprises plunger chambers arranged in a pump body, two-position three-way high-speed switching valves connected with an oil tank and a load, an absolute value angle encoder connected with crank shafts of the plunger chambers, a flow-distribution body and a controller, wherein the two-position three-way high-speed switching valves are connected with the plunger chambers through the flow-distribution body, the controller is connected with the absolute value angle encoder and the two-position three-way high-speed switching valves, the controller receives a corner signal measured through the absolute value angle encoder, a PWM signal and a stroke control signal are output to the two-position three-way high-speed switching valves through a duty ratio control algorithm and a stroke ratio control algorithm, and therefore constant flow of the pump is achieved. According to the digital flow-distribution constant-flow radial plunger pump, the valves are controlled through the duty ratio and the stroke ratio, pulsation of the output flow of a hydraulic pump is reduced, pump vibration is relieved, long-time running of the pump is facilitated, random rotating speed working condition can be adapted, and constant-flow output is achieved.

Description

technical field [0001] The invention relates to a technology in the field of plunger pumps, in particular to a radial plunger pump with digital distribution and constant flow. Background technique [0002] In hydraulic wind power generation and hydraulic ocean energy power generation technology, the system structure mostly adopts the circuit of "quantitative hydraulic pump-variable hydraulic motor" to collect wind energy or ocean energy, mainly through the displacement adjustment of the variable hydraulic motor to achieve stable speed control and power generation , and the hydraulic pump still adopts a quantitative hydraulic pump designed according to the driving principle of constant high speed, it is difficult to ensure that it can meet the requirements of random and variable working conditions unique to wind power and ocean energy power generation for a long time, and this pump is difficult Running at low speed for a long time will cause frequent system failures. Existin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B1/04F04B1/06
CPCF04B1/04F04B1/063
Inventor 施光林郁立成齐礼东
Owner SHANGHAI JIAOTONG UNIV
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