Hydraulic system capable of preventing motor oil seal from being damaged by punching

Abstract

The utility model provides a hydraulic system for preventing motor oil seal from being damaged by flushing, which comprises a hydraulic oil tank, an electric control variable plunger pump assembly and a driving assembly, the hydraulic oil tank is connected with the electric control variable plunger pump assembly through an oil pipe, an oil feeding pipeline of the electric control variable plunger pump assembly is respectively connected with a flushing valve group and a motor, and the flushing valve group is connected with the driving assembly. The motor is connected with the driving assembly and controls the driving assembly to work, the flushing valve set and the oil outlet end of the motor are connected with the oil return pipeline through oil pipes, and the oil return end of the oil return pipeline is connected with the electric control variable plunger pump assembly. According to the utility model, the flushing valve and the motor are independent, so that oil of the flushing valve does not pass through a motor shell and is returned independently; and when the driven working assembly is instantly stopped due to external factors, the internal pressure of the motor shell is not influenced, and the oil seal is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a hydraulic system that prevents motor oil seals from being damaged. Background Technology

[0002] In a closed-loop system, if the motor stops rotating momentarily due to external factors, the pressure on the low-pressure side of the motor will instantly increase. This low-pressure side is connected to the flushing valve, and the flushing flow rate will also increase instantaneously due to the increased pressure. Because the flow rate to the housing increases rapidly, the housing pressure rises rapidly, causing damage to the rotating oil seal of the motor shaft. Figure 2 As shown. Utility Model Content

[0003] The present invention aims to provide a hydraulic system that avoids damage to the motor oil seal, thereby overcoming or at least partially solving the above-mentioned problems.

[0004] To achieve the above objectives, the technical solution of this utility model is specifically implemented as follows:

[0005] This utility model provides a hydraulic system to prevent motor oil seals from being damaged by flushing, including a hydraulic oil tank, an electronically controlled variable displacement piston pump assembly, and a drive assembly. The hydraulic oil tank is connected to the electronically controlled variable displacement piston pump assembly via oil pipes. The oil supply lines of the electronically controlled variable displacement piston pump assembly are connected to a flushing valve assembly and a motor, respectively. The motor is connected to the drive assembly and controls the operation of the drive assembly. The oil outlets of the flushing valve assembly and the motor are both connected to a return oil line via oil pipes. The return oil line's return end is connected to the electronically controlled variable displacement piston pump assembly.

[0006] As a further embodiment of this utility model, a radiator is also included, which is connected to the hydraulic oil tank via an oil pipe, and the other end of the radiator is connected to the motor, the flushing valve group and the electronically controlled variable piston pump assembly via a cooling oil pipe.

[0007] This utility model provides a hydraulic system that prevents motor oil seals from being damaged by flushing. The advantages are: the flushing valve is separated from the motor, the oil in the flushing valve does not pass through the motor housing, and returns oil independently; when the drive assembly stops momentarily due to external factors, the internal pressure of the motor housing will not be affected, and the oil seal will not be affected. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1This is a diagram of the hydraulic system of this utility model.

[0010] Figure 2 This is a system diagram of the original hydraulic system.

[0011] In the diagram: 1. Hydraulic oil tank; 2. Electronically controlled variable displacement piston pump assembly; 3. Return oil line; 4. Supply oil line; 5. Flushing valve assembly; 6. Motor; 7. Drive assembly; 8. Radiator; 9. Cooling oil line; 10. Motor housing. Detailed Implementation

[0012] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0013] See Figure 1 This utility model provides a hydraulic system to prevent motor oil seals from being damaged by flushing. It includes a hydraulic oil tank 1, an electronically controlled variable piston pump assembly 2, and a drive assembly 7. The hydraulic oil tank 1 is connected to the electronically controlled variable piston pump assembly 2 via oil pipes. The oil supply line 4 of the electronically controlled variable piston pump assembly 2 is connected to the flushing valve group 5 and the motor 6, respectively. The motor 6 is connected to the drive assembly 7 and controls the operation of the drive assembly 7. The oil outlets of the flushing valve group 5 and the motor 6 are both connected to the return oil line 3 via oil pipes. The return oil end of the return oil line 3 is connected to the electronically controlled variable piston pump assembly 2.

[0014] It also includes a radiator 8, which is connected to the hydraulic oil tank 1 via an oil pipe. The other end of the radiator 8 is connected to the motor 6, the flushing valve group 5, and the electronically controlled variable piston pump assembly 2 via a cooling oil pipe 9. The radiator 8 can cool down the hydraulic oil in the hydraulic oil tank 1 and then send it to the motor 6, the flushing valve group 5, and the electronically controlled variable piston pump assembly 2 to cool down the motor 6, the flushing valve group 5, and the electronically controlled variable piston pump assembly 2.

[0015] In use, the hydraulic oil in the hydraulic oil tank 1 is sent to the electronically controlled variable piston pump assembly 2 by a gear pump. Then, the electronically controlled variable piston pump assembly 2 runs and drives the hydraulic oil to circulate. First, the hydraulic oil is sent to the motor 6 through the oil supply line 4 and drives the motor 6 shaft to rotate, thereby controlling the operation of the drive assembly 7. Then, the hydraulic oil flows back to the electronically controlled variable piston pump assembly 2 through the return line 3. When there is a lot of hydraulic oil sent into the oil supply line 4, the excess hydraulic oil will overflow to the flushing valve assembly 5 and then flow back through the return line 3.

[0016] By separating the flushing valve assembly 5 from the motor 6, the oil in the flushing valve assembly 5 does not pass through the motor housing 10 and returns oil independently; when the drive assembly 7 stops momentarily due to external factors during operation, it will not affect the internal pressure of the motor housing 10, and the oil seal will not be affected.

[0017] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A hydraulic system for preventing damage to motor oil seals, comprising a hydraulic oil tank (1), an electronically controlled variable displacement piston pump assembly (2), and a drive assembly (7), characterized in that, The hydraulic oil tank (1) is connected to the electronically controlled variable piston pump assembly (2) via an oil pipe. The oil supply line (4) of the electronically controlled variable piston pump assembly (2) is connected to the flushing valve group (5) and the motor (6) respectively. The motor (6) is connected to the drive assembly (7) and controls the operation of the drive assembly (7). The oil outlets of the flushing valve group (5) and the motor (6) are connected to the return oil line (3) via oil pipes. The return oil end of the return oil line (3) is connected to the electronically controlled variable piston pump assembly (2).

2. The hydraulic system for preventing damage to the motor oil seal according to claim 1, characterized in that, It also includes a radiator (8), which is connected to the hydraulic oil tank (1) via an oil pipe, and the other end of the radiator (8) is connected to the motor (6), the flushing valve group (5) and the electronically controlled variable piston pump assembly (2) via a cooling oil pipe (9).

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