Crankshaft radial two-way variable displacement piston pump

Abstract

The invention discloses a crankshaft type radial two-way variable displacement plunger pump, which comprises a radial plunger pump. A pump shaft extends out of a pump body from the bottom end and is connected with a divider through a coupler. An extension block radially arranged a driven shaft with the circular cross section. The divider comprises a shell, an oil distribution shaft and a fixing block, wherein the oil distribution shaft is mounted in the casing through a bearing capable of rotating in the shell, a cavity is arranged in the oil distribution shaft and has the circular cross section, the radius of the circular section of the cavity is equal to the sum of the radius of the cross section of the driven shaft and the extension length of the extension block, the fixing block is arranged in the axial direction of the cavity of the oil distribution shaft, the fixing block is fixedly connected with the oil distribution shaft, the driven shaft of the coupler penetrates the cavity of the oil distribution shaft, and the extension block of the coupler is hermetically butted against the inner wall of the cavity of the oil distribution shaft so that the cavity of the oil distribution shaft is divided into a first auxiliary cavity unit and a second auxiliary cavity unit. Besides, the shell of the divider is provided with a first oil inlet and a second oil inlet. A simplified, energy-saving, high-efficiency and impact-vibration-free hydraulic driving system can be formed by the aid of the crankshaft type radial two-way variable displacement plunger pump.

Description

technical field [0001] The invention relates to a radial plunger pump, in particular to a crankshaft type radial bidirectional variable displacement plunger pump. Background technique [0002] At present, the operating pressure of the known hydraulic drive systems in the world is between 30-60MPa, and the displacement of high-pressure oil pumps (including axial piston pumps and radial piston pumps) is below 1000L / min. It can only complete one-way liquid supply. After using these pumps to form a system, the control of hydraulic system action can only be completed by switching various valves (hereinafter referred to as valve control system), which brings the following disadvantages: 1) The driving efficiency of the system is low: the high-pressure energy formed by the high-pressure pump consumes a lot of energy can only be used for a single action, and then this part of energy must be released in vain before the next action can be performed, which is a serious waste of energy ...

AI Technical Summary

Problems solved by technology

[0002] At present, the operating pressure of the known hydraulic drive systems in the world is between 30-60MPa, and the displacement of high-pressure oil pumps (including axial piston pumps and radial piston pumps) is below 1000L / min. It can only complete one-way liquid supply. After using these pumps to form a system, the control of hydraulic system action can only be completed by switching various valves (hereinafter referred to as valve control system), which brings the following disadvantages: 1) The driving efficiency of the system is low: the high-pressure energy formed by the high-pressure pump consumes a lot of energy can only be used for a single action, and then this part of energy must be released in vain before the next action can be performed, which is a serious waste of energy and brings the following other aspects Side effects; 2) The system shocks and vibrates strongly: when the high-pressure energy is released, this part of the energy impacts all the components connected to it through the liquid, such as pipes, valve blocks, etc., which greatly reduces the life of each component of the system and increases the failure rate; 3 ) If you use multi-stage valve group sequential pressure reduction or servo proportional control, although the hydraulic shock can be slowed down, the cycle of system action is sacrificed, which greatly reduces the productivity of huge equipment; During the process of loading, the oil generates a lot of heat and releases part of the high-pressure energy. The increase in oil temperature reduces the life of the hydraulic oil, and then the installed power of the cooling system supporting the system must be increased to match, which in turn causes further energy waste.

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