Integrated hydraulic servo valve

Abstract

The utility model discloses an integrated hydraulic servo valve, relates to the technical field of hydraulic servo valves, and aims to solve the problem that the subsequent use of the integrated hydraulic servo valve is influenced due to accumulation caused by precipitation of impurities in oil after the oil enters an existing internal oil path. The inner core valve body is installed in the hydraulic servo valve body, one end of the inner core valve body penetrates through and extends to the outside, a first circulation cavity, a second circulation cavity and a third circulation cavity are formed in the inner core valve body, and the first circulation cavity, the second circulation cavity and the third circulation cavity are all integrally formed with the inner core valve body. A second reserved hole is formed in the outer wall of the first circulation cavity, and a third reserved hole is formed in the outer wall of the inner core valve body.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic servo valve technology, specifically an integrated hydraulic servo valve. Background Technology

[0002] A hydraulic servo valve is a hydraulic control valve whose output and input quantities have a certain functional relationship and can respond quickly. It is an important component of a hydraulic servo system.

[0003] For example, the Chinese patent with publication number CN201723518U, entitled "(Electro-controlled Hydraulic Servo Valve)," includes a nozzle, a throttling baffle, a valve body, a valve core, and a return oil passage located within the valve body. Its key feature is the addition of a throttling nozzle to the return oil passage. After high-pressure oil is ejected from the nozzle, it is first buffered by the throttling nozzle before flowing into the low-pressure zone of the return oil passage. The returning oil maintains a certain pressure in the area between the nozzle and the throttling nozzle, preventing eddies and cavitation near the baffle. This ensures the throttling baffle remains undisturbed, resulting in stable valve core displacement and thus stable oil output pressure, improving the control accuracy of the servo valve. This invention solves a problem that has remained unresolved in existing technologies simply by adding a throttling nozzle to the return oil passage.

[0004] However, the existing internal oil circuit has a problem where impurities accumulate in the oil after it enters, which affects the subsequent use of the integrated hydraulic servo valve. Therefore, it does not meet the current requirements, so we proposed an integrated hydraulic servo valve. Utility Model Content

[0005] The purpose of this invention is to provide an integrated hydraulic servo valve to solve the existing problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated hydraulic servo valve, comprising: a hydraulic servo valve body, wherein a discharge hole is provided at the middle position of the outer wall of the hydraulic servo valve body, and two discharge holes are provided, both of which are integrally formed with the hydraulic servo valve body;

[0007] Also includes:

[0008] An inner core valve body is installed inside the hydraulic servo valve body. One end of the inner core valve body extends through and to the outside. The inner core valve body is provided with a first flow cavity, a second flow cavity, and a third flow cavity. The first flow cavity, the second flow cavity, and the third flow cavity are all integrally formed with the inner core valve body. The outer wall of the first flow cavity is provided with a second reserved hole, and the outer wall of the inner core valve body is provided with a third reserved hole.

[0009] Preferably, a hydraulic inner cavity is provided at the center of the hydraulic servo valve body. One side of the outer wall of the inner core valve body is connected to the hydraulic servo valve body by a spring coil. A connecting rod is provided at the other end of the inner core valve body, and the connecting rod is fixedly connected to the other end face of the inner core valve body. A scraper is provided at the lower end of the connecting rod, and a blade is provided on the upper end face of the scraper, and a plurality of blades are provided.

[0010] Preferably, one end of the inner core valve body is provided with a connecting end, which is threadedly connected to one end of the inner core valve body by a hexagonal bolt, and a plurality of hexagonal bolts are provided.

[0011] Preferably, a first reserved hole is provided around the outer wall of the connecting end, and three first reserved holes are provided, all three of which are integrally formed with the connecting end.

[0012] Preferably, an installation cavity is provided inside one end of the hydraulic servo valve body.

[0013] Preferably, the second reserved hole is integrally formed with the outer wall of the first flow cavity, and the third reserved hole is integrally formed with the outer wall of the inner core valve body.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model features a connecting rod and scraper plate at one end of the inner core valve body, and a first flow chamber, a second flow chamber, and a third flow chamber inside the inner core valve body. One end of the inner core valve body is installed inside the hydraulic inner cavity. The first reserved hole on the connecting end can be used to install an oil inlet pipe, an oil outlet pipe, and an oil discharge pipe, respectively. During use, oil in the oil inlet pipe can enter the hydraulic inner cavity through the second flow chamber, thereby effectively moving the overall position of the inner core valve body forward. The position can be extended and retracted by a spring coil. The connecting rod and scraper plate at one end of the inner core valve body can clean the inner wall of one end of the hydraulic servo valve body after the oil is completely output, effectively avoiding the problem of impurities accumulating in the oil after entering the existing internal oil circuit, which would affect the subsequent use of the integrated hydraulic servo valve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the first cross-sectional structure of the hydraulic servo valve body of this utility model;

[0018] Figure 3 This is a schematic diagram of the second cross-sectional structure of the hydraulic servo valve body of this utility model;

[0019] In the diagram: 100, hydraulic servo valve body; 101, discharge port; 102, hydraulic inner cavity; 103, mounting cavity; 200, connecting end; 2001, hex bolt; 201, first reserved hole; 300, inner core valve body; 301, first flow cavity; 301, second reserved hole; 302, third reserved hole; 303, second flow cavity; 304, third flow cavity; 305, spring ring; 306, connecting rod; 307, scraper plate; 308, blade. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example 1

[0022] Please see Figure 1-3 An embodiment of this utility model is provided: an integrated hydraulic servo valve, including: a hydraulic servo valve body 100, a discharge hole 101 is provided at the middle position of the outer wall of the hydraulic servo valve body 100, and there are two discharge holes 101, both of which are integrally formed with the hydraulic servo valve body 100.

[0023] Also includes:

[0024] The inner core valve body 300 is installed inside the hydraulic servo valve body 100. One end of the inner core valve body 300 extends through and to the outside. The inner core valve body 300 is provided with a first flow cavity 301, a second flow cavity 303 and a third flow cavity 304. The first flow cavity 301, the second flow cavity 303 and the third flow cavity 304 are all integrally formed with the inner core valve body 300. The outer wall of the first flow cavity 301 is provided with a second reserved hole 30101 and the outer wall of the inner core valve body 300 is provided with a third reserved hole 302.

[0025] The first flow chamber 301, the second flow chamber 303, and the third flow chamber 304 can be configured to control the oil circuit of the inner core valve body 300 under different operating conditions.

[0026] Example 2

[0027] Please see Figure 3 A hydraulic inner cavity 102 is provided at the center of the hydraulic servo valve body 100, and one side of the outer wall of the inner core valve body 300 extends and retracts with the hydraulic servo valve body 100 through a spring coil 305.

[0028] The spring coil 305 effectively provides a buffer cavity space for the movement of the inner core valve body 300.

[0029] Please see Figure 1 One end of the inner core valve body 300 is provided with a connecting end 200. The connecting end 200 is threadedly connected to one end of the inner core valve body 300 by a hexagonal bolt 2001. Several hexagonal bolts 2001 are provided. A first reserved hole 201 is provided around the outer wall of the connecting end 200. There are three first reserved holes 201. All three first reserved holes 201 are integrally formed with the connecting end 200.

[0030] The connection end 200 can be detachably installed and assembled with one end of the inner core valve body 300 by means of the hexagonal bolt 2001.

[0031] Please see Figure 2 The hydraulic servo valve body 100 has an installation cavity 103 inside one end. The second reserved hole 30101 is integrally formed with the outer wall of the first flow cavity 301, and the third reserved hole 302 is integrally formed with the outer wall of the inner core valve body 300.

[0032] Working principle: When assembling the hydraulic servo valve body 100 and the inner core valve body 300, one end of the inner core valve body 300 is installed inside the hydraulic inner cavity 102. The first reserved hole 201 on the connecting end 200 can be used to install the oil inlet pipe, oil outlet pipe and oil discharge pipe respectively. During use, the oil in the oil inlet pipe can enter the interior of the hydraulic inner cavity 102 through the second flow cavity 303, thereby effectively moving the overall position of the inner core valve body 300 forward. The position can be extended and retracted by the spring coil 305. The connecting rod 306 and scraper 307 set at one end of the inner core valve body 300 can clean the inner wall of one end of the hydraulic servo valve body 100 after the oil is completely output, effectively avoiding the sedimentation of internal impurities, which would affect the delivery of oil in and out.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An integrated hydraulic servo valve, including a hydraulic servo valve body (100), wherein a discharge hole (101) is provided at the middle position of the outer wall of the hydraulic servo valve body (100), and there are two discharge holes (101), both of which are integrally formed with the hydraulic servo valve body (100). Its features are: Also includes: An inner core valve body (300) is installed inside the hydraulic servo valve body (100). One end of the inner core valve body (300) extends through and to the outside. The inner core valve body (300) is provided with a first flow chamber (301), a second flow chamber (303), and a third flow chamber (304). The first flow chamber (301), the second flow chamber (303), and the third flow chamber (304) are all integrally formed with the inner core valve body (300). The outer wall of the first flow chamber (301) is provided with a second reserved hole (30101), and the outer wall of the inner core valve body (300) is provided with a third reserved hole (302).

2. The integrated hydraulic servo valve according to claim 1, characterized in that: A hydraulic inner cavity (102) is provided at the center of the hydraulic servo valve body (100). One side of the outer wall of the inner core valve body (300) is connected to the hydraulic servo valve body (100) by a spring ring (305). A connecting rod (306) is provided at the other end of the inner core valve body (300), and the connecting rod (306) is fixedly connected to the other end face of the inner core valve body (300). A scraper plate (307) is provided at the lower end of the connecting rod (306), and a blade (308) is provided on the upper end face of the scraper plate (307), and there are several blades (308).

3. The integrated hydraulic servo valve according to claim 1, characterized in that: One end of the inner core valve body (300) is provided with a connecting end (200), which is threaded to one end of the inner core valve body (300) by a hexagonal bolt (2001), and a plurality of hexagonal bolts (2001) are provided.

4. The integrated hydraulic servo valve according to claim 3, characterized in that: The outer wall of the connecting end (200) is provided with a first reserved hole (201) around it, and there are three first reserved holes (201), all of which are integrally formed with the connecting end (200).

5. The integrated hydraulic servo valve according to claim 1, characterized in that: The hydraulic servo valve body (100) has an installation cavity (103) inside one end.

6. The integrated hydraulic servo valve according to claim 1, characterized in that: The second reserved hole (30101) is integrally formed with the outer wall of the first flow cavity (301), and the third reserved hole (302) is integrally formed with the outer wall of the inner core valve body (300).

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