Fan positive and negative rotation valve group used for constant-pressure variable pump hydraulic system

Abstract

The utility model provides a fan positive and negative rotation valve group for a constant-pressure variable pump hydraulic system, which comprises a constant-pressure variable pump, the output end of the constant-pressure variable pump is connected with the input end of an electric control valve through a pipeline, and the output end of the electric control valve is connected with the input end of a pressure reducing valve through a pipeline. The output end of the pressure reducing valve is connected with the reversing fan oil cylinder through a pipeline, deformation of blades of the reversing fan is controlled through the reversing fan oil cylinder, a one-way valve is further arranged on one side of the pressure reducing valve, and the input end of the one-way valve is connected with the output end of the pressure reducing valve through a pipeline. The output end of the one-way valve is connected with the input end of the pressure reducing valve through a pipeline. According to the utility model, the failure rate of the pressure reducing valve is reduced, the service life is prolonged, and the energy consumption of a constant-pressure variable pump system can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery technical field especially relates to a fan positive and negative rotation valve group for constant pressure variable pump hydraulic system. BACKGROUND

[0002] With the continuous promotion of agricultural mechanization, fan positive and negative rotation function has been widely used, and the traditional fan positive and negative rotation function valve group is mainly matched with the design of the constant delivery pump, and the failure rate will be increased after the valve group is matched with the design of the variable pump hydraulic system. Figure 2 As shown in the figure. SUMMARY

[0003] The utility model aims at providing a fan positive and negative rotation valve group for constant pressure variable pump hydraulic system overcomes above -mentioned problem or at least partially solves above -mentioned problem.

[0004] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] The utility model provides a fan positive and negative rotation valve group for constant pressure variable pump hydraulic system, including constant pressure variable pump, the output of constant pressure variable pump is connected with the input of electric control valve through pipeline, the output of electric control valve is connected with the input of pressure reducing valve through pipeline, the output of pressure reducing valve is connected with reversing fan oil cylinder through pipeline, and the blade deformation of reversing fan is controlled through reversing fan oil cylinder, one side of pressure reducing valve is also provided with check valve, the input of check valve is connected with the output of pressure reducing valve through pipeline, and the output of check valve is connected with the input of pressure reducing valve through pipeline.

[0006] As a further scheme of the utility model, the electric control valve is a three-way valve, one end of the electric control valve is connected with the output of the constant pressure variable pump through the pipeline, one end is connected with the pressure reducing valve through the pipeline, and one end is connected with the return oil pipeline of the external oil tank through the pipeline.

[0007] The utility model provides a fan positive and negative rotation valve group for constant pressure variable pump hydraulic system, which has the beneficial effects of reducing the failure rate of the pressure reducing valve, improving the service life, and reducing the energy consumption of the constant pressure variable pump system. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description can be obtained by the ordinary skilled in the art without creative labor.

[0009] Figure 1The utility model discloses a structure schematic drawing.

[0010] Figure 2 It is the structure schematic drawing of prior constant pressure variable pump hydraulic system.

[0011] In the drawing: 1, constant pressure variable pump, 2, electric control valve, 3, pressure reducing valve, 4, reversing fan oil cylinder, 5, check valve. DETAILED DESCRIPTION

[0012] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0013] Referring to Figure 1 The utility model discloses a fan positive and negative rotation valve group for constant pressure variable pump hydraulic system, including constant pressure variable pump 1, the output of constant pressure variable pump 1 is connected with the input of electric control valve 2 through pipeline, the output of electric control valve 2 is connected with the input of pressure reducing valve 3 through pipeline, the output of pressure reducing valve 3 is connected with reversing fan oil cylinder 4 through pipeline, and the blade deformation of reversing fan is controlled through reversing fan oil cylinder 4, one side of pressure reducing valve 3 is also provided with check valve 5, the input of check valve 5 is connected with the output of pressure reducing valve 3 through pipeline, and the output of check valve 5 is connected with the input of pressure reducing valve 3 through pipeline.

[0014] Electric control valve 2 is three-way valve, and one end of electric control valve 2 is connected with the output of constant pressure variable pump 1 through pipeline, one end is connected with pressure reducing valve 3 through pipeline, and one end is connected with the return pipeline of external oil tank through pipeline.

[0015] The utility model in the using process:

[0016] After changing: constant pressure variable pump 1 supplies oil to electric control valve 2, then supplies oil to pressure reducing valve 3 by electric control valve 2, and finally reaches the actuator, namely reversing fan oil cylinder 4, when reversing fan does not work, solenoid valve 2 is powered off, and the passage between constant pressure variable pump 1 and pressure reducing valve 3 is blocked, at this time, pressure reducing valve 3 does not work, reduces the use frequency, increases the service life, and at the same time, the displacement of constant pressure variable pump 1 is close to zero under this state, and energy consumption is reduced.

[0017] Before changing: as Figure 2As shown, the constant pressure variable pump 1 supplies oil to the pressure reducing valve 3, then to the electric control valve 2, and finally to the linear mechanism, i.e. the reversing fan oil cylinder 4. When the reversing fan is not working, the pressure reducing valve 3 is always in working state (reducing high pressure to specified pressure), which reduces the service life of the pressure reducing valve 3 and increases the failure rate of the pressure reducing valve 3. At the same time, the constant pressure variable pump 1 is always in small displacement working state, which wastes energy consumption.

[0018] The above only is the embodiment of the present application, and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A fan forward / reverse valve group for use in a constant pressure variable pump hydraulic system including a constant pressure variable pump (1), characterized by, The output end of the constant pressure variable pump (1) is connected with the input end of the electric control valve (2) through a pipeline, the output end of the electric control valve (2) is connected with the input end of the pressure reducing valve (3) through a pipeline, the output end of the pressure reducing valve (3) is connected with the reversing fan oil cylinder (4) through a pipeline, and the blade deformation of the reversing fan is controlled through the reversing fan oil cylinder (4), and one side of the pressure reducing valve (3) is also provided with a check valve (5), the input end of the check valve (5) is connected with the output end of the pressure reducing valve (3) through a pipeline, and the output end of the check valve (5) is connected with the input end of the pressure reducing valve (3) through a pipeline.

2. A fan reversible valve group for use in a constant pressure variable displacement pump hydraulic system according to claim 1, characterized in that, The electric control valve (2) is a three-way valve, one end of the electric control valve (2) is connected with the output end of the constant pressure variable pump (1) through a pipeline, one end is connected with the pressure reducing valve (3) through a pipeline, and one end is connected with the oil return pipeline of the external oil tank through a pipeline.

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