Large step variable control multi-link energy-saving hydraulic pump station

Abstract

The invention discloses a large step variable control multi-link energy-saving hydraulic pump station which comprises an oil tank, a high-pressure oil pump assembly and at least one group medium-pressure oil pump assembly, wherein the high-pressure oil pump assembly is connected with the oil tank; the output oil channel of the high-pressure oil pump assembly and the output oil channel of the medium-pressure oil pump assembly are connected with a converging control assembly which is provided with a general output oil channel; each medium-pressure oil pump assembly is provided with an independent control switch; and the output oil channel of each medium-pressure oil pump assembly is provided with an independent pressure-regulating assembly. According to the invention, a multi-link pump mode of the high-pressure pump and at least one group of medium-pressure pump is adopted, not only can the requirement of high flow rate be satisfied, but also the requirement on different levels of pressure of an inner chamber metal extrusion molding machine can be satisfied, the response is rapid, the noise is less, and the cost is lower; and further the independent pressure-regulating assembly is configured in each medium-pressure oil pump assembly, and more rich pressure regulating choices are provided by the inner chamber metal extrusion molding machine.

Description

technical field [0001] The invention relates to a hydraulic pump station, in particular to controlling multiple energy-saving hydraulic pump stations with a large-scale stepped variable. Background technique [0002] In the inner cavity metal extrusion molding machine, due to the large number of actuators, the hydraulic pump station is required to provide different pressures and large flow rates, and the working conditions are more complicated. However, the existing large-scale hydraulic pump station adopts a single variable displacement pump to meet the design requirements, which has the characteristics of high efficiency, but the variable displacement pump with large flow rate has disadvantages such as high cost, slow response to swing angle, and large noise. However, the existing large-scale hydraulic pump station also has a separate quantitative pump. Compared with the variable pump, the quantitative pump is relatively low in cost, easy to use and maintain, and has the a...

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Problems solved by technology

[0002] In the inner cavity metal extrusion molding machine, due to the large number of actuators, it requires the hydraulic pump station to provide different pressures and large flow rates, and the working conditions are more complicated

However, the existing large-scale hydraulic pump station adopts a single variable variable pump to meet the design requirements, which has the characteristics of high efficiency, but the variable variable pump with large flow rate has disadvantages such as high cost, slow response to swing angle, and large noise.

However, the existing large-scale hydraulic pump station also has a separate quantitative pump. Compared with the variable pump, the quantitative pump is relatively low in cost, easy to use and maintain, and has the advantages of good pressure stabilization performance and fast dynamic response, but there is little room for pressure adjustment. The shortcomings of the machine cannot be well adapted to the complex working conditions of the inner cavity metal extrusion molding machine

It can be seen that the above two types of hydraulic pump stations cannot meet the working requirements of the inner cavity metal extrusion molding machine

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