Hydraulic motor flush valve for heat dissipation

Abstract

The hydraulic motor flush valve comprises a valve body and a valve rod, a first oil cavity and a second oil cavity which are communicated are formed in the valve body, the first oil cavity is of a cylindrical structure, annular oil grooves are formed in the inner side walls, located on the two sides of the middle line, of the first oil cavity respectively, and the valve rod comprises a main body of a cylindrical structure. Outer circles are arranged on the outer side walls, located on the two sides of the middle line, of the body, the diameter of the outer circles is the same as that of the first oil cavity, the front sections of the outer circles are used for blocking and isolating the oil groove and the second oil cavity, the rear sections of the outer circles are provided with notches for hydraulic oil to pass through, and the two ends of the valve rod are connected with reset mechanisms respectively. The second oil cavity is connected with a flushing oil way, and the flushing oil way flows through a shell of the hydraulic motor.

Description

Technical Field

[0001] The utility model relates to a hydraulic motor flushing valve for heat dissipation. Background Art

[0002] Traditional hydraulic motor flushing valves have deficiencies in heat dissipation performance, leakage control, and flushing oil port opening response speed. The opening and closing of the existing flushing rod is controlled by a small U-groove opened inside the flushing valve body to control the oil entry and adjust the movement of the flushing rod to open and close the flushing port. The structure mills the U-groove inside the valve body, which makes processing more difficult and easily damages the inner hole, causing valve body leakage, affecting the heat dissipation performance and motor volumetric efficiency. Utility Model Content

[0003] The purpose of the utility model is to solve the above deficiencies in the prior art and provide a hydraulic motor flushing valve for heat dissipation.

[0004] A hydraulic motor flushing valve for heat dissipation comprises a valve body and a valve stem. A first oil chamber and a second oil chamber which are connected to each other are arranged in the valve body. The first oil chamber is a cylindrical structure. The first oil chamber is located on the inner side walls on both sides of the center line of the first oil chamber and annular oil grooves are arranged respectively. The valve stem comprises a main body of the cylindrical structure. The outer side walls on both sides of the center line of the main body are provided with an outer circle. The diameter of the outer circle is the same as the diameter of the first oil chamber. The front section of the outer circle is used to block the isolation oil groove and the second oil chamber. The rear section of the outer circle is provided with a notch for the passage of hydraulic oil. The two ends of the valve stem are respectively connected to a reset mechanism. The reset mechanism is used to reset the valve stem. The second oil chamber is connected to a flushing oil circuit. The flushing oil circuit flows through the housing of the hydraulic motor.

[0005] Preferably, the notch is a plane formed by milling the rear section of the outer circle.

[0006] Preferably, the first oil chamber and the second oil chamber are vertically arranged, the second oil chamber is connected to the middle section of the first oil chamber, and a pressure-maintaining valve is provided in the second oil chamber.

[0007] Preferably, the reset mechanism includes a first spring seat, a second spring seat, and a compression spring, the first spring seat is connected to the valve stem, the second spring seat is connected to the first oil chamber, and the spring is located between the first spring seat and the second spring seat.

[0008] Preferably, the first spring seat is an annular structure, the first spring seat is sleeved on the rear end of the valve stem, the front end surface of the first spring seat is connected to the rear end surface of the outer circle, and the rear end surface of the first spring seat is connected to one end of the spring.

[0009] Preferably, the second spring seat is a cylindrical structure, the front section of its outer wall is provided with a thread and is threadedly connected to the first oil chamber, a shoulder is provided behind the thread on its outer wall, and a mounting groove is provided on its front end face, the spring is located in the mounting groove, the other end of the spring is connected to the bottom of the mounting groove, both ends of the first oil chamber are connected to the outside, and the front end face of the shoulder on the second spring seat is connected to the end face of the first oil chamber at the opening on the valve body.

[0010] Preferably, a sealing ring is provided between the inner wall of the first oil chamber and the outer wall of the second spring seat.

[0011] Beneficial effect: Compared with the prior art, the utility model adopts the structure of opening a U-shaped groove inside the flushing valve body to adjust the flushing opening control point to the flushing rod. Specifically, the rear section of the outer circle of the end of the flushing rod is flattened so that the oil enters from the flattened part of the flushing rod to control the movement of the flushing rod. This structure solves the problems of difficult processing of the traditional existing hydraulic motor flushing valve body and easy wear of the inner hole; the leakage control effect is improved; and the performance and reliability of the hydraulic motor are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram when the valve stem is in the middle position;

[0013] Figure 2 This is a schematic diagram of the valve body during flushing;

[0014] Figure 3 is a schematic diagram of the valve stem;

[0015] In the figure, 1, valve body, 2, valve stem, 3, first spring seat, 4, compression spring, 5, second spring seat, 6, pressure maintaining valve, 7, outer circle, 8, notch. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0017] like Figure 1-3 As shown, valve body 1, valve stem 2, first spring seat 3, compression spring 4, second spring seat 5, pressure retaining valve 6, outer circle 7, notch 8;

[0018] A hydraulic motor flushing valve for heat dissipation comprises a valve body 1 and a valve stem 2. A first oil chamber and a second oil chamber connected to each other are arranged in the valve body 1. The first oil chamber is a cylindrical structure. The first oil chamber is located on the inner side walls on both sides of the center line of the first oil chamber and annular oil grooves are respectively arranged. The valve stem 2 comprises a main body of the cylindrical structure. The outer side walls on both sides of the center line of the main body are provided with outer circles 7. The diameter of the outer circle 7 is the same as the diameter of the first oil chamber. The front section of the outer circle 7 is used to block and separate the oil groove and the second oil chamber. It should be noted that, in this embodiment, the two annular oil grooves of the first oil chamber divide the first oil chamber into area A, area B, and area C. The area between the two oil grooves is area C. The two oil grooves to the two ends of the first oil chamber are area A and area B respectively, the left side is area A, and the right side is area B.

[0019] The rear section of the outer circle 7 is provided with a notch 8 for the passage of hydraulic oil. The two ends of the valve stem 2 are respectively connected to a reset mechanism for resetting the valve stem 2. The second oil chamber is connected to a flushing oil circuit, and the flushing oil circuit flows through the housing of the hydraulic motor.

[0020] In this embodiment, the notch 8 is a plane formed by milling the rear section of the outer circle 7. It should be noted that the shape of the notch 8 is not limited to a plane, and can be a groove, a U-shaped groove, or the diameter of the rear section of the outer circle 7 is smaller than that of the front section,

[0021] In this embodiment, the first oil chamber and the second oil chamber are vertically arranged, the second oil chamber is connected to the middle section of the first oil chamber, and a pressure-maintaining valve 6 is provided in the second oil chamber. It should be noted that the second oil chamber is connected to the C zone.

[0022] In this embodiment, the reset mechanism includes a first spring seat 3, a second spring seat 5, and a compression spring 4. The first spring seat 3 is connected to the valve stem 2, the second spring seat 5 is connected to the first oil chamber, and the spring is located between the first spring seat 3 and the second spring seat 5.

[0023] In this embodiment, the first spring seat 3 is an annular structure, which is sleeved on the rear end of the valve stem 2, with its front end surface connected to the rear end surface of the outer circle 7, and its rear end surface connected to one end of the spring.

[0024] In this embodiment, the second spring seat 5 is a cylindrical structure, the front section of its outer wall is provided with a thread and is threadedly connected to the first oil chamber, a shoulder is provided behind the thread on its outer wall, and a mounting groove is provided on its front end surface. The spring is located in the mounting groove, and the other end of the spring is connected to the bottom of the mounting groove. Both ends of the first oil chamber are connected to the outside, and the front end surface of the shoulder on the second spring seat 5 is connected to the end surface of the first oil chamber at the opening on the valve body 1.

[0025] In this embodiment, a sealing ring is provided between the inner wall of the first oil chamber and the outer wall of the second spring seat 5 .

[0026] Instructions for use: A channel is provided inside the valve body 1. When high-pressure oil enters from area A and fills the gap between the rear of the outer circle 7 of the valve stem 2 and the valve body 1, an axial thrust of the high-pressure oil on the valve stem 2 is formed, thereby pushing the flushing rod to the left; when the flushing rod moves to the left, the left outer circle 7 moves away from the oil groove, so that the low-pressure side area B is connected with the area C where the pressure-maintaining valve 6 is located; at this time, the flushing oil in the low-pressure side area B flows through the area C, passes through the pressure-maintaining valve 6, and flows through the shell, and flows back to the oil tank together with the leaked oil from the shell, which plays a role in flushing the shell and dissipating heat.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic motor flushing valve for heat dissipation, characterized in that: It includes a valve body and a valve stem. The valve body is provided with a first oil chamber and a second oil chamber that are connected to each other. The first oil chamber is a cylindrical structure. The first oil chamber is located on the inner walls on both sides of the midline and annular oil grooves are respectively provided. The valve stem includes a main body of the cylindrical structure. The outer walls on both sides of the midline of the main body are provided with an outer circle. The diameter of the outer circle is the same as that of the first oil chamber. The front section of the outer circle is used to block the isolation oil groove and the second oil chamber. The rear section of the outer circle is provided with a notch for the passage of hydraulic oil. The two ends of the valve stem are respectively connected to a reset mechanism. The reset mechanism is used to reset the valve stem. The second oil chamber is connected to a flushing oil circuit, and the flushing oil circuit flows through the housing of the hydraulic motor.

2. A hydraulic motor flushing valve for heat dissipation according to claim 1, characterized in that: The notch is a plane formed by milling the rear section of the outer circle.

3. A hydraulic motor flushing valve for heat dissipation according to claim 1, characterized in that: The first oil chamber and the second oil chamber are vertically arranged, the second oil chamber is connected to the middle section of the first oil chamber, and a pressure-maintaining valve is arranged in the second oil chamber.

4. A hydraulic motor flushing valve for heat dissipation according to claim 1, characterized in that: The reset mechanism comprises a first spring seat, a second spring seat and a compression spring. The first spring seat is connected to the valve stem, the second spring seat is connected to the first oil chamber, and the spring is located between the first spring seat and the second spring seat.

5. A hydraulic motor flushing valve for heat dissipation according to claim 4, characterized in that: The first spring seat is an annular structure, which is sleeved on the rear end of the valve stem, with its front end surface connected to the rear end surface of the outer circle, and its rear end surface connected to one end of the spring.

6. A hydraulic motor flushing valve for heat dissipation according to claim 4, characterized in that: The second spring seat is a cylindrical structure, the front section of its outer wall is provided with a thread and is threadedly connected to the first oil chamber, a shoulder is provided behind the thread on its outer wall, and a mounting groove is provided on its front end surface, the spring is located in the mounting groove, and the other end of the spring is connected to the bottom of the mounting groove, the two ends of the first oil chamber are connected to the outside, and the front end surface of the shoulder on the second spring seat is connected to the end surface of the first oil chamber at the opening on the valve body.

7. A hydraulic motor flushing valve for heat dissipation according to claim 6, characterized in that: A sealing ring is arranged between the inner wall of the first oil chamber and the outer wall of the second spring seat.

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