Low-noise servo valve adopting hydraulic sealing type structure

Abstract

The utility model relates to the technical field of servo valves, in particular to a low-noise servo valve adopting a hydraulic sealing type structure, which comprises a servo valve main body, the sealing assembly comprises a sealing disc arranged on the inner wall of the circular groove in a sliding mode and mounting columns which are fixedly arranged on the upper surface of the sealing disc in a circumferential array mode and correspond to the three movable oil ports, first expansion air bag rings are fixedly arranged on the outer surfaces of the mounting columns, and a sealing oil liquid cavity and an annular cavity are formed in the sealing disc; and a piston disc is arranged on the inner wall of the sealing oil liquid cavity in a sliding manner. Through the arrangement of the sealing assembly, after the servo valve is used, the double-shaft motor can be started through the control switch, the three first expansion air bag rings are expanded, the movable oil port is filled and sealed, meanwhile, when the servo valve needs to be used, the sealing disc can be rapidly taken out, and the service life of the servo valve is prolonged. And therefore, the defect that the sealed movable oil port is inconvenient to open in the prior art is effectively overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of servo valves, in particular to a low-noise servo valve with a hydraulic sealing structure. Background Art

[0002] The electro-hydraulic servo valve is a key component in electro-hydraulic servo control. It is a hydraulic control valve that receives analog electrical signals and outputs modulated flow and pressure accordingly.

[0003] In the prior art, a servo valve with good sealing performance, published as CN220487979U, adopts the scheme of "including a servo valve body, one side of the servo valve body is evenly provided with active oil ports, one side of the servo valve body is positioned with a sealing mechanism, the other side of the servo valve body is fixedly connected with a driving motor, the sealing mechanism includes a No. 1 sealing limit port, a No. 2 sealing limit port, a connecting fixing plate, a connecting threaded hole, a leak-proof sealing block, a leak-proof sealing plug, a positioning anti-detachment block, a No. 1 sealing rubber block, a No. 2 sealing rubber block, a positioning fixing plate, a movable connecting block, a limit anti-detachment block, a damper, an elastic member, a reinforcing sealing plate and a connecting threaded ring". The scheme describes a servo valve with good sealing performance, and the sealing mechanism facilitates strengthening the sealing performance of the servo valve. When the servo valve is not needed, the active oil port needs to be sealed because the interior of the servo valve contains oil to prevent the valve core from rusting over time.

[0004] However, the above scheme still has shortcomings. When the movable oil port is actually sealed, it is necessary to insert the leak-proof sealing block into the interior of the movable oil port to seal it. However, after sealing, when the servo valve needs to be used, the leak-proof sealing block is difficult to remove from the interior of the movable oil port under the action of the No. 1 sealing rubber block and the No. 2 sealing rubber block, thereby causing inconvenience to the operator. That is, the above patent technology has the defect that it is inconvenient to open the sealed movable oil port.

[0005] In view of this, the utility model proposes a low-noise servo valve adopting a hydraulic sealing structure. Utility Model Content

[0006] The purpose of the utility model is to provide a low-noise servo valve adopting a hydraulic sealing structure, which has the advantage of being able to quickly install and disassemble the sealing component, so as to solve the defect of the inconvenience of opening the sealed active oil port mentioned in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A low-noise servo valve adopting a hydraulic sealing structure comprises:

[0009] A servo valve body, wherein a circular groove is formed on the lower surface of the servo valve body, and three movable oil ports are formed on the inner top wall of the circular groove in a circumferential array;

[0010] A sealing assembly comprises a sealing disk slidably arranged on the inner wall of a circular groove, and mounting columns fixedly arranged in a circumferential array on the upper surface of the sealing disk and corresponding to three movable oil ports, a first expansion airbag ring being fixedly arranged on the outer surface of the mounting column, a sealing oil chamber and an annular chamber being respectively provided inside the sealing disk, a piston disk being slidably arranged on the inner wall of the sealing oil chamber, and oil pipes respectively extending to the interior of the three first expansion airbag rings being embedded in a circumferential array on the inner top wall of the sealing oil chamber, a dual-axis motor being fixedly arranged on the inner bottom wall of the sealing oil chamber, and threaded columns being fixedly arranged at both output ends of the dual-axis motor, two symmetrical sliders being slidably arranged on the inner bottom wall of the sealing oil chamber, and threaded holes threadedly connected to the outer surfaces of the two threaded columns being respectively provided on the sides of the two sliders, a push rod being rotatably arranged on the upper surface of the slider, and the top end of the push rod being rotatably connected to the lower surface of the piston disk.

[0011] As a preferred technical solution, a rechargeable battery for powering the dual-axis motor is fixedly provided on the inner bottom wall of the sealed oil chamber, and a control switch for controlling the dual-axis motor is provided on the lower surface of the sealing disk.

[0012] As a preferred technical solution, a sealing ring is fixedly disposed on the outer ring surface of the piston disc and is slidably connected to the inner wall of the sealing oil chamber, and the material of the sealing ring is elastic rubber.

[0013] As a preferred technical solution, a rubber ring is fixedly provided on the upper surface of the sealing disk, and a first annular sealing groove corresponding to the rubber ring is formed on the inner top wall of the circular groove.

[0014] As a preferred technical solution, the sealing assembly also includes two second expansion airbag rings fixedly mounted on the outer surface of the sealing disk, and the inner ring wall of the circular groove is provided with two second annular sealing grooves corresponding to the two second expansion airbag rings.

[0015] As a preferred technical solution, two symmetrical air boxes are fixedly provided on the inner wall of the annular cavity, and piston plates are slidably provided on the inner wall of the air box. Air pipes extending to the interior of the two second expansion airbag rings are embedded in the inner wall of the air box.

[0016] As a preferred technical solution, two symmetrical connecting rods are fixedly provided on the side of the slider, and the ends of the two connecting rods are fixedly connected to the side of the piston plate. The inner wall of the sealed oil chamber and the side of the air box are provided with through holes for the connecting rods to slide. Beneficial Effects

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] The utility model provides a sealing component, so that after the servo valve is used, the sealing disk can be inserted into the circular groove, and the double-axis motor can be started by the control switch to expand the three first expansion airbag rings to fill and seal the active oil port. At the same time, when the servo valve needs to be used, the double-axis motor can be started by the control switch to reverse, and the sealing disk can be taken out downward, thereby effectively solving the defect of the prior art that it is inconvenient to open the active oil port after sealing.

[0019] The utility model provides a sealing assembly. When two slide blocks move on both sides simultaneously to seal the movable oil port, the movement of the sliding block can drive the connecting rod to push the piston plate, thereby achieving effective sealing between the sealing disk and the inner wall of the circular groove, thereby effectively improving the sealing effect of the sealing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the sealing disk separation of the utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0025] In the figure:

[0026] 100, servo valve body; 101, circular groove; 102, movable oil port;

[0027] 200, sealing assembly; 201, sealing disk; 202, mounting column; 203, first inflation airbag ring; 204, sealing oil chamber; 205, annular chamber; 206, piston disk; 207, oil pipe; 208, dual-axis motor; 209, threaded column; 2010, slider; 2011, push rod; 2012, rechargeable battery; 2013, control switch; 2014, sealing ring; 2015, rubber ring; 2016, first annular sealing groove; 2017, second inflation airbag ring; 2018, second annular sealing groove; 2019, inflation box; 2020, piston plate; 2021, air pipe; 2022, connecting rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0029] According to the attached Figure 1-Figure 3 As shown, the embodiment of the utility model provides a low-noise servo valve adopting a hydraulic sealing structure, comprising:

[0030] A servo valve body 100, a circular groove 101 is formed on the lower surface of the servo valve body 100, and three movable oil ports 102 are formed in a circular array on the inner top wall of the circular groove 101;

[0031] The sealing assembly 200 includes a sealing disk 201 slidably disposed on the inner wall of the circular groove 101, and mounting columns 202 fixedly disposed in a circular array on the upper surface of the sealing disk 201 and corresponding to the three movable oil ports 102. A rubber ring 2015 is fixedly disposed on the upper surface of the sealing disk 201, and the inner top wall of the circular groove 101 is provided with a first annular sealing groove 2016 corresponding to the rubber ring 2015.

[0032] A first expansion airbag ring 203 is fixedly provided on the outer surface of the mounting column 202, and a sealing oil cavity 204 and an annular cavity 205 are respectively opened inside the sealing disk 201. A piston disk 206 is slidably provided on the inner wall of the sealing oil cavity 204, and a sealing ring 2014 is fixedly provided on the outer ring surface of the piston disk 206 and is slidably connected to the inner wall of the sealing oil cavity 204. The material of the sealing ring 2014 is elastic rubber.

[0033] The inner top wall of the sealed oil chamber 204 is embedded with oil pipes 207 in a circular array, which extend to the inside of the three first expansion airbag rings 203 respectively. The inner bottom wall of the sealed oil chamber 204 is fixed with a dual-axis motor 208, and the two output ends of the dual-axis motor 208 are fixed with threaded columns 209. The inner bottom wall of the sealed oil chamber 204 is slidably provided with two symmetrical sliders 2010, and the sides of the two sliders 2010 are respectively provided with threaded holes threadedly connected to the outer surfaces of the two threaded columns 209, and the upper surface of the slider 2010 is rotatably provided with a push rod 2011, and the top end of the push rod 2011 is rotatably connected to the lower surface of the piston disk 206.

[0034] A rechargeable battery 2012 for powering the dual-axis motor 208 is fixedly disposed on the inner bottom wall of the sealing oil chamber 204 , and a control switch 2013 for controlling the dual-axis motor 208 is disposed on the lower surface of the sealing disk 201 .

[0035] In this embodiment, by providing the sealing assembly 200, after the servo valve is used, the sealing disc 201 can be inserted into the circular groove 101, and the three mounting columns 202 and the unexpanded first expansion airbag ring 203 on the mounting column 202 are respectively inserted into the three active oil ports 102, and then the dual-axis motor 208 is started by the control switch 2013, and the rotation of the dual-axis motor 208 drives the two threaded columns 209 to rotate, and the rotation of the two threaded columns 209 drives the two sliders 2010 to move to both sides at the same time, so that the piston disc 206 is pushed by the push rod 2011, so that the piston disc 206 moves upward, and the sealing oil on the top of the sealing oil liquid chamber 204 is pressed into the interior of the three first expansion airbag rings 203 through the oil pipe 207, so that the three first expansion airbag rings 203 expand and the active oil port 102 is filled and sealed. At the same time, when the servo valve needs to be used, the dual-axis motor 208 can be started to reverse by controlling the switch 2013, and the sealing oil in the three first expansion airbag rings 203 is sucked into the top of the sealing oil liquid chamber 204, and then the sealing disk 201 is taken out downward, thereby effectively solving the defect of the prior art that it is inconvenient to open the sealed active oil port 102. Example

[0036] Based on Example 1, refer to Figure 4 , and different from the first embodiment,

[0037] The sealing assembly 200 further includes two second expansion airbag rings 2017 fixedly mounted on the outer surface of the sealing disk 201 , and the inner ring wall of the circular groove 101 is provided with two second annular sealing grooves 2018 corresponding to the two second expansion airbag rings 2017 .

[0038] Two symmetrical air boxes 2019 are fixedly provided on the inner wall of the annular cavity 205, and a piston plate 2020 is slidably provided on the inner wall of the air box 2019. The inner wall of the air box 2019 is embedded with an air pipe 2021 extending to the inside of the two second expansion airbag rings 2017 respectively.

[0039] Two symmetrical connecting rods 2022 are fixedly provided on the side of the slider 2010, and the ends of the two connecting rods 2022 are fixedly connected to the side of the piston plate 2020. The inner wall of the sealed oil cavity 204 and the side of the air box 2019 are provided with through holes for the connecting rods 2022 to slide.

[0040] In this embodiment, by setting up the sealing assembly 200, when the two sliders 2010 move on both sides at the same time to seal the active oil port 102, the movement of the slider 2010 can drive the connecting rod 2022 to push the piston plate 2020, so that the piston plate 2020 presses the air in the inflation box 2019 into the interior of the second expansion airbag ring 2017, so that the second expansion airbag ring 2017 expands and is pressed into the second annular sealing groove 2018, thereby achieving effective sealing between the sealing disk 201 and the inner wall of the circular groove 101, thereby effectively improving the sealing effect of the sealing assembly 200.

[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A low-noise servo valve with a hydraulic sealing structure, characterized in that: include, A servo valve body (100), wherein a circular groove (101) is formed on the lower surface of the servo valve body (100), and three movable oil ports (102) are formed on the inner top wall of the circular groove (101) in a circular array; The sealing assembly (200) comprises a sealing disc (201) slidably arranged on the inner wall of a circular groove (101), and mounting posts (202) fixedly arranged in a circumferential array on the upper surface of the sealing disc (201) and corresponding to the three movable oil ports (102), wherein the outer surface of the mounting posts (202) is fixedly provided with a first expansion airbag ring (203), the interior of the sealing disc (201) is respectively provided with a sealing oil chamber (204) and an annular chamber (205), the inner wall of the sealing oil chamber (204) is slidably provided with a piston disc (206), and the inner top wall of the sealing oil chamber (204) is embedded with pistons (206) extending to the three first expansion airbag rings (203) in a circumferential array. An oil pipe (207) is arranged inside the expansion airbag ring (203); a dual-axis motor (208) is fixedly arranged on the inner bottom wall of the sealed oil cavity (204); and threaded columns (209) are fixedly arranged on the two output ends of the dual-axis motor (208); two symmetrical sliders (2010) are slidably arranged on the inner bottom wall of the sealed oil cavity (204); and threaded holes threadedly connected to the outer surfaces of the two threaded columns (209) are respectively provided on the sides of the two sliders (2010); a push rod (211) is rotatably arranged on the upper surface of the slider (2010), and the top end of the push rod (2011) is rotatably connected to the lower surface of the piston disc (206).

2. A low-noise servo valve with a hydraulic sealing structure according to claim 1, characterized in that: A rechargeable battery (2012) for supplying power to the dual-axis motor (208) is fixedly disposed on the inner bottom wall of the sealing oil chamber (204), and a control switch (2013) for controlling the dual-axis motor (208) is disposed on the lower surface of the sealing disk (201).

3. The low-noise servo valve with a hydraulic sealing structure according to claim 1, characterized in that: A sealing ring (2014) is fixedly disposed on the outer ring surface of the piston disc (206) and is slidably connected to the inner wall of the sealing oil chamber (204); the sealing ring (2014) is made of elastic rubber.

4. The low-noise servo valve with a hydraulic sealing structure according to claim 1, characterized in that: A rubber ring (2015) is fixedly provided on the upper surface of the sealing disk (201), and a first annular sealing groove (2016) corresponding to the rubber ring (2015) is formed on the inner top wall of the circular groove (101).

5. The low-noise servo valve with a hydraulic sealing structure according to claim 1, characterized in that: The sealing assembly (200) further comprises two second expansion airbag rings (2017) fixedly mounted on the outer surface of the sealing disk (201), and the inner ring wall of the circular groove (101) is provided with two second annular sealing grooves (2018) corresponding to the two second expansion airbag rings (2017).

6. A low-noise servo valve with a hydraulic sealing structure according to claim 5, characterized in that: Two symmetrical air boxes (2019) are fixedly provided on the inner wall of the annular cavity (205), and a piston plate (2020) is slidably provided on the inner wall of the air box (2019), and air pipes (2021) extending to the interior of the two second expansion airbag rings (2017) are embedded in the inner wall of the air box (2019).

7. A low-noise servo valve with a hydraulic sealing structure according to claim 6, characterized in that: Two symmetrical connecting rods (2022) are fixedly provided on the side of the slider (2010), and the ends of the two connecting rods (2022) are fixedly connected to the side of the piston plate (2020), and the inner wall of the sealed oil cavity (204) and the side of the inflation box (2019) are provided with through holes for the connecting rods (2022) to slide.

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