An electrically controlled hydraulic servo valve

Abstract

The application provides an electric control hydraulic servo valve, and belongs to the technical field of servo valves. The electric control hydraulic servo valve comprises an electro-hydraulic servo valve, one side of an oil inlet end is provided with a filtering mechanism for removing impurities from oil, and one side of the oil inlet end is provided with a collecting mechanism for collecting impurities. The filtering mechanism can filter impurities contained in oil to be introduced into the electro-hydraulic control valve, and the scraping plate can scrape off the impurities remaining on one side of the filter plate. When the scraping plate is lowered to clean the filter plate, the steel wire rope drives the baffle to move, the discharge hole is opened, the impurities enter the inside of the collecting box through the discharge hole, and the impurities are collected through the collecting box. Therefore, when the oil mixed into the servo valve contains many impurities, the problem that the hydraulic valve is easily blocked, the hydraulic valve is disassembled and cleaned many times, and the hydraulic valve is easily damaged is solved.

Description

Technical Field

[0001] This application relates to the field of servo valves, and more specifically, to an electro-hydraulic servo valve. Background Technology

[0002] Electro-hydraulic servo valves (e-hydraulic servo valves) are the core components of electro-hydraulic servo control systems. They achieve precise control of the displacement, speed, force, or torque of hydraulic actuators (such as hydraulic cylinders and hydraulic motors) by converting electrical signals into hydraulic energy and adjusting the valve core position, thereby achieving precise control of the flow, pressure, and direction of the hydraulic system.

[0003] However, existing electro-hydraulic servo valves still have the following shortcomings during use: most existing electro-hydraulic servo valves do not have a pre-filtering device when regulating the oil. When there are many impurities in the oil mixed into the servo valve, it is easy to cause blockage inside the hydraulic valve. Repeated disassembly and cleaning of the hydraulic valve can easily damage it. Utility Model Content

[0004] To overcome the above deficiencies, this application provides an electro-hydraulic servo valve, which aims to improve the problem that when there are many impurities mixed into the oil inside the servo valve, it is easy to cause internal blockage of the hydraulic valve, and repeated disassembly and cleaning of the hydraulic valve can easily damage the hydraulic valve.

[0005] This application provides an electro-hydraulic servo valve, including an electro-hydraulic servo valve. One side of the electro-hydraulic servo valve is provided with an oil inlet end. One side of the oil inlet end is provided with a filter mechanism for removing impurities from the oil, and one side of the oil inlet end is provided with a collection mechanism for collecting impurities.

[0006] The filtration mechanism includes a second pipe, one end of which is connected to the oil inlet, and the other end of which is connected to a filter chamber. The other side of the filter chamber is connected to a first pipe, and a filter plate is connected inside the filter chamber.

[0007] In one specific implementation, a first housing is connected to one side of the filter chamber, a guide rod is connected inside the first housing, and a guide plate is slidably connected to the outer surface of the guide rod.

[0008] In the above implementation process, by setting the guide rod, the guide plate can slide on the outer surface of the guide rod, providing the direction of movement for the guide plate.

[0009] In one specific implementation, a second housing is connected to the other side of the filter chamber, and a motor is connected to the top of the second housing. The output shaft of the motor passes through the second housing and is connected to a lead screw, the other end of which is rotatably connected inside the second housing.

[0010] In the above implementation process, by setting up a motor, the output shaft of the motor can be controlled to rotate, which in turn drives the lead screw to rotate inside the second housing.

[0011] In one specific implementation, the outer surface of the lead screw is threaded with a sliding seat, which is slidably connected inside the second housing.

[0012] In the above implementation process, by setting up the sliding seat, when the lead screw rotates, it can drive the sliding seat connected to the outer surface threaded to move up and down inside the second housing.

[0013] In one specific implementation, a scraper is connected to one side of the sliding seat, and the other end of the scraper is connected to one side of the guide plate, with one side of the scraper in close contact with one side of the filter plate.

[0014] In the above implementation process, the scraper can be moved when the sliding seat moves, causing the guide plate to slide on the outer surface of the guide rod. The scraper moves downward to clean one side of the filter plate and prevent the filter plate from clogging.

[0015] In one specific implementation, the collection mechanism includes a discharge port located at the bottom of the filter chamber, and a collection box connected to the bottom of the filter chamber, the collection box being connected to the filter chamber through the discharge port.

[0016] In the above implementation process, by setting the discharge hole, the impurities scraped off by the scraper can enter the inside of the collection box through the discharge hole, and the collection box can collect the impurities.

[0017] In one specific implementation, the filter chamber has an internal cavity, and a baffle is slidably connected inside the cavity.

[0018] In the above implementation process, the baffle can slide inside the cavity. When the baffle is above the discharge hole, it can block the discharge hole and prevent oil from entering the collection box when impurities are not cleaned. When the baffle moves into the cavity, the discharge hole is opened, allowing impurities to enter the collection box through the discharge hole when impurities are cleaned.

[0019] In one specific implementation, two sets of steel wire ropes are connected to one side of the baffle, with one end of each steel wire rope passing through multiple filtration chambers and connected to the top of the scraper.

[0020] In the above process, by setting up the wire rope, when the scraper cleans the filter plate, the scraper moves downward and drives the baffle to slide into the cavity through the wire rope, which can open the discharge hole.

[0021] In one specific implementation, a plurality of first springs are connected to one side of the baffle, a break is provided in the middle section of the wire rope, one end of the break is connected to a mounting plate, and a second spring is connected between the two sets of mounting plates.

[0022] In the above implementation process, by setting the first spring, the first spring can be compressed when the baffle moves into the cavity. When the scraper moves upward, the first spring releases elastic potential energy, which can drive the baffle to reset, thereby blocking the discharge hole.

[0023] In one specific implementation, the elastic potential energy of the second spring is greater than that of the first spring.

[0024] In the above implementation process, by setting the second spring, after the first spring is fully compressed, the baffle cannot move inside the cavity, the discharge hole is fully opened, and the second spring can start to stretch, so that the scraper can continue to move downward to clean the entire filter plate.

[0025] Compared with the prior art, the beneficial effects of this application are as follows: By setting up a filtration mechanism and a collection mechanism, impurities contained in the oil entering the electro-hydraulic control valve can be filtered through the filter plate, and impurities remaining on one side of the filter plate can be scraped off by a scraper. While the scraper is cleaning the filter plate as it descends, the baffle is moved by the wire rope, which opens the discharge hole, allowing impurities to enter the collection box through the discharge hole and be collected. This solves the problem that when there are many impurities mixed into the oil inside the servo valve, it is easy to cause blockage inside the hydraulic valve, and the hydraulic valve is easily damaged by repeated disassembly and cleaning. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of an electro-hydraulic servo valve provided in an embodiment of this application;

[0028] Figure 2 A schematic diagram of the electro-hydraulic servo valve structure provided for an embodiment of this application;

[0029] Figure 3 A schematic diagram of the filter chamber structure provided for an embodiment of this application;

[0030] Figure 4A schematic diagram of the filter plate structure provided for an embodiment of this application;

[0031] Figure 5 A schematic diagram of the motor structure provided for an embodiment of this application;

[0032] Figure 6 A schematic diagram of the cavity structure provided for an embodiment of this application;

[0033] Figure 7 A schematic diagram of the wire rope structure provided for an embodiment of this application;

[0034] Figure 8 A schematic diagram of the scraper structure provided for an embodiment of this application.

[0035] In the diagram: 1. Electro-hydraulic servo valve; 2. Filtration mechanism; 201. Filtration chamber; 202. First pipe; 203. Second pipe; 204. First housing; 205. Second housing; 206. Motor; 207. Filter plate; 208. Guide rod; 209. Lead screw; 2010. Sliding seat; 2011. Scraper; 2012. Guide plate; 3. Collection mechanism; 301. Collection box; 302. Cavity; 303. First spring; 304. Baffle; 305. Steel wire rope; 306. Disconnection point; 307. Mounting plate; 308. Second spring; 309. Discharge hole; 4. Oil inlet. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0037] Please see Figure 1 This application provides an electro-hydraulic servo valve, including an electro-hydraulic servo valve 1.

[0038] Please see Figure 1 and Figure 2 An oil inlet 4 is provided on one side of the electro-hydraulic servo valve 1. A filter mechanism 2 for removing impurities from the oil is provided on one side of the oil inlet 4. A collection mechanism 3 for collecting impurities is provided on one side of the oil inlet 4.

[0039] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8The filter mechanism 2 includes a second pipe 203, one end of which is connected to the oil inlet 4, and the other end of which is connected to the filter chamber 201. The other side of the filter chamber 201 is connected to the first pipe 202, and the filter plate 207 is connected inside the filter chamber 201.

[0040] In a specific implementation, the filter chamber 201 is connected to a first housing 204 on one side. A guide rod 208 is connected inside the first housing 204. A guide plate 2012 is slidably connected to the outer surface of the guide rod 208. The guide rod 208 allows the guide plate 2012 to slide on the outer surface of the guide rod 208, providing a direction for movement for the guide plate 2012.

[0041] In a specific configuration, a second housing 205 is connected to the other side of the filter chamber 201. A motor 206 is connected to the top of the second housing 205. The output shaft of the motor 206 passes through the second housing 205 and is connected to a lead screw 209. The other end of the lead screw 209 is rotatably connected inside the second housing 205. By configuring the motor 206, the output shaft of the motor 206 can be controlled to rotate, thereby driving the lead screw 209 to rotate inside the second housing 205.

[0042] In a specific configuration, a sliding seat 2010 is threadedly connected to the outer surface of the lead screw 209. The sliding seat 2010 is slidably connected inside the second housing 205. The sliding seat 2010 allows the lead screw 209 to rotate, thereby driving the sliding seat 2010, which is threadedly connected to the outer surface, to move up and down inside the second housing 205.

[0043] In the specific configuration, a scraper 2011 is connected to one side of the sliding seat 2010, and the other end of the scraper 2011 is connected to one side of the guide plate 2012. One side of the scraper 2011 is in close contact with one side of the filter plate 207. The scraper 2011 can be moved when the sliding seat 2010 moves, causing the guide plate 2012 to slide on the outer surface of the guide rod 208. The downward movement of the scraper 2011 cleans one side of the filter plate 207, preventing the filter plate 207 from becoming clogged.

[0044] In a specific configuration, the collecting mechanism 3 includes a discharge hole 309, which is located at the bottom of the filter chamber 201. A collecting box 301 is connected to the bottom of the filter chamber 201. The collecting box 301 is connected to the filter chamber 201 through the discharge hole 309. The discharge hole 309 allows impurities scraped off by the scraper 2011 to enter the interior of the collecting box 301, where they are collected.

[0045] In the specific configuration, the filter chamber 201 has a cavity 302 inside, and a baffle 304 is slidably connected inside the cavity 302. The baffle 304 can slide inside the cavity 302. When the baffle 304 is above the discharge hole 309, it can block the discharge hole 309, preventing oil from entering the collection box 301 when impurities are not being cleaned. When the baffle 304 moves into the cavity 302, the discharge hole 309 is opened, allowing impurities to enter the collection box 301 through the discharge hole 309 when impurities are being cleaned.

[0046] In the specific configuration, two sets of steel wire ropes 305 are connected to one side of the baffle 304. One end of the steel wire rope 305 passes through the multiple filtration chamber 201 and is connected to the top of the scraper 2011. The steel wire rope 305 allows the scraper 2011 to move downwards when cleaning the filter plate 207, and the steel wire rope 305 drives the baffle 304 to slide into the cavity 302, thereby opening the discharge hole 309.

[0047] In the specific configuration, multiple sets of first springs 303 are connected to one side of the baffle 304, and a break point 306 is provided in the middle section of the wire rope 305. One end of the break point 306 is connected to a mounting plate 307, and a second spring 308 is connected between the two sets of mounting plates 307. The first springs 303 can be compressed when the baffle 304 moves into the cavity 302. When the scraper 2011 moves upward, the first springs 303 release elastic potential energy, which can drive the baffle 304 to reset, thereby blocking the discharge hole 309.

[0048] In a specific configuration, the elastic potential energy of the second spring 308 is greater than that of the first spring 303. By setting the second spring 308, after the first spring 303 is fully compressed, the baffle 304 cannot move inside the cavity 302, and the discharge hole 309 is fully opened. Only then can the second spring 308 begin to stretch, allowing the scraper 2011 to continue moving downwards to clean the entire filter plate 207.

[0049] The working principle of this electro-hydraulic servo valve is as follows: When using the electro-hydraulic servo valve, the motor 206 drives the lead screw 209 to rotate inside the first housing 204, which in turn drives the sliding seat 2010 to move downward, causing the scraper 2011 to move downward, and the guide plate 2012 to slide on the outer surface of the guide rod 208. The scraper 2011 cleans one side of the filter plate 207. When the scraper 2011 descends, the wire rope 305 drives the baffle 304 to move into the cavity 302, opening the discharge port. Impurities scraped off by scraper 2011 enter the interior of collection box 301 through discharge hole 309. Collection box 301 collects the impurities. When scraper 2011 moves upward, first spring 303 releases elastic potential energy, which can drive baffle 304 to reset and block discharge hole 309. This prevents oil from entering the interior of collection box 301 when impurities are not cleaned. This solves the problem that when there are many impurities mixed into the servo valve, the hydraulic valve is easily blocked, and the hydraulic valve is easily damaged by repeated disassembly and cleaning.

[0050] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electro-hydraulic servo valve, characterized in that, include An electro-hydraulic servo valve (1) is provided with an oil inlet end (4) on one side, a filter mechanism (2) for removing impurities from the oil is provided on one side of the oil inlet end (4), and a collection mechanism (3) for collecting impurities is provided on one side of the oil inlet end (4). The filtration mechanism (2) includes a second pipe (203), one end of which is connected to the oil inlet (4), and the other end of which is connected to a filter chamber (201). The other side of the filter chamber (201) is connected to a first pipe (202), and a filter plate (207) is connected inside the filter chamber (201).

2. The electro-hydraulic servo valve according to claim 1, characterized in that, A first housing (204) is connected to one side of the filter chamber (201), and a guide rod (208) is connected inside the first housing (204). A guide plate (2012) is slidably connected to the outer surface of the guide rod (208).

3. The electro-hydraulic servo valve according to claim 2, characterized in that, The filter chamber (201) is connected to a second housing (205) on the other side. A motor (206) is connected to the top of the second housing (205). The output shaft of the motor (206) passes through the second housing (205) and is connected to a lead screw (209). The other end of the lead screw (209) is rotatably connected inside the second housing (205).

4. The electro-hydraulic servo valve according to claim 3, characterized in that, The outer surface of the lead screw (209) is threaded with a sliding seat (2010), which is slidably connected inside the second housing (205).

5. The electro-hydraulic servo valve according to claim 4, characterized in that, A scraper (2011) is connected to one side of the sliding seat (2010), and the other end of the scraper (2011) is connected to one side of the guide plate (2012). One side of the scraper (2011) is in close contact with one side of the filter plate (207).

6. The electro-hydraulic servo valve according to claim 1, characterized in that, The collecting mechanism (3) includes a discharge hole (309), which is located at the bottom of the filter chamber (201). A collection box (301) is connected to the bottom of the filter chamber (201), and the collection box (301) is connected to the filter chamber (201) through the discharge hole (309).

7. The electro-hydraulic servo valve according to claim 6, characterized in that, The filter chamber (201) has an internal cavity (302), and a baffle (304) is slidably connected inside the cavity (302).

8. The electro-hydraulic servo valve according to claim 7, characterized in that, Two sets of steel wire ropes (305) are connected to one side of the baffle (304), and one end of the steel wire rope (305) passes through the multiple filtration chamber (201) and is connected to the top of the scraper (2011).

9. An electro-hydraulic servo valve according to claim 8, characterized in that, The baffle (304) is connected to one side of multiple sets of first springs (303), the middle section of the wire rope (305) is provided with a break (306), one end of the break (306) is connected to a mounting plate (307), and a second spring (308) is connected between the two sets of mounting plates (307).

10. An electro-hydraulic servo valve according to claim 9, characterized in that, The elastic potential energy of the second spring (308) is greater than that of the first spring (303).

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