CN203604770U - High-frequency-response direct-acting switch valve - Google Patents

Abstract

The utility model relates to a high-response frequency direct-acting on-off valve. Its technical scheme is: the driving device (12) is fixed on the left side of the oil circuit control device (17), and the left end of the spool (15) in the oil circuit control device (17) is connected with the magnetic control memory alloy (5). The magnetic control memory alloy (5) in the driving device (12) is positioned at the center of the gap edge of the excitation core (8), and the left end of the magnetic control memory alloy (5) is installed in the blind hole of the top seat (6). (5) The right end is connected with the left end of the spool (15) passing through the support (11); the two sides adjacent to the gap edge of the excitation core (8) are wound with the first excitation coil (2) and the second excitation coil (2) Coil (9). The spool (15) is coaxially installed in the valve body (16), and the diameter of the second cavity on the left side of the valve body (16) is between the maximum and minimum diameters of the truncated cone of the spool (15); the spool ( 15) The right end is in contact with the return spring (20) in the center hole of the right valve cover (19). The utility model has the characteristics of high frequency response, large output force, simple structure, strong anti-interference and easy maintenance.

Description

A high-response direct-acting on-off valve

technical field

The utility model belongs to the technical field of high-speed switching valves. In particular, it relates to a high-response direct-acting on-off valve. the

Background technique

Since the beginning of the 21st century, people have become more and more demanding on the hydraulic control system with the characteristics of high frequency response, large output force and simple structure, especially due to the vigorous development of the automobile industry, including electronically controlled fuel injection of automobile engines , body suspension control, wheel anti-lock braking device and clutch automatic control, etc., all use the digital control element of high-speed switching valve as the connection bridge between the electronic computer and the controlled object, so that people can directly use the electronic computer to control Complete the control task of the controlled object. the

With the wide application of electro-hydraulic systems in modern engineering technology, people have put forward higher requirements for the technical performance and functional form of high-speed switching valves, which are concentrated in the requirement that high-speed switching valves have both large flow and high-speed dynamic response characteristics, such as modern A two-position three-way electromagnetic switch valve used in the engine's electronically controlled fuel injection system requires the switching speed of the electromagnetic switch valve to be at the millisecond level and the flow rate to be above 30L/min. Existing high-speed switching valves cannot meet the requirements of such dynamic response speed and large flow rate at the same time. the

Contents of the invention

The utility model aims to solve the defects of the prior art, and aims to provide a high-response direct-acting on-off valve with high frequency response, large output force, simple structure, strong anti-interference performance and easy maintenance. the

In order to achieve the above purpose, the technical solution adopted by the utility model is: the high-response direct-acting on-off valve is composed of a driving device and an oil circuit control device. The driving device is fixed on the left side of the oil circuit control device, and the left end of the spool in the oil circuit control device is connected with the magnetic control memory alloy. the

The structure of the driving device is: the excitation core is installed between the first support plate and the second support plate, and the first support plate, the excitation core and the second support plate are fixed on the support by bolts. The magnetic control memory alloy is located in the center of the edge of the exciter core gap, the left end of the magnetic control memory alloy is installed in the blind hole of the top seat, and the top seat is embedded in the blind hole of the first support plate. The first excitation coil is wound on one side of the excitation core adjacent to the notch side, and the second excitation coil is wound on the other side of the excitation core adjacent to the notch side. The two short sides of the exciter core notch are respectively wrapped with the first cooling water pipe and the second cooling water pipe; the support and the non-magnetic protective cover are fixed on the left side of the oil circuit control device, and the magnetic control memory alloy and the oil circuit control Device coaxial. the

The structure of the oil circuit control device is: the left valve cover is installed on the left side of the valve body, and the right valve cover is installed on the right side of the valve body. The interior of the valve body is composed of four cylindrical cavities connected by coaxial lines. The first cavity on the left communicates with _P1 port of one oil circuit, and the second cavity on the right communicates with _P2 port of another oil circuit. . The spool is coaxially installed in the valve body, the middle part of the spool is a cylindrical boss, the left side of the cylindrical boss is a conical truncated, and the diameter of the second cavity on the left is between the maximum diameter and the smallest diameter of the conical truncated between diameters. The right end of the spool stretches into the center hole of the right bonnet and contacts the return spring in the center hole, and the left end of the spool stretches out the left bonnet and the support to be connected with the magnetically controlled memory alloy.

The hole wall of the left valve cover is equipped with a left sealing ring, and the hole wall of the right valve cover is equipped with a right sealing ring. the

The excitation core is in the shape of a square ring, and there is a gap in the middle of one side of the square ring. the

The first cooling water pipe is a rectangular pipe, one end of the rectangular pipe is a water inlet, the other end is a water outlet, and the surface of the rectangular pipe is coated with a magnetic isolation material; the first cooling water pipe is the same as the second cooling water pipe. the

The top seat is a "T" shaped cylinder, the diameter of the cylinder on the left side of the top seat is larger than the diameter of the right cylinder, the right end of the top seat has a blind hole, and the material of the top seat is a magnetic isolation material. the

The connection between the left end of the spool (15) and the magnetic control memory alloy (5) refers to: the center of the left end face of the spool (15) has a blind hole, and the right end of the magnetic control memory alloy (5) is placed in the valve In the blind hole at the left end of the core (15). the

Due to the adoption of the above technical scheme, the magnetic control memory alloy of the utility model is located at the center of the notch of the excitation core, the left end of the magnetic control memory alloy is installed in the blind hole of the top seat, and the right end of the magnetic control memory alloy is installed in the left end of the valve core. In the blind hole, the first excitation coil is wound on one side of the excitation core adjacent to the edge of the notch, and the second excitation coil is wound on the other edge of the excitation core adjacent to the edge of the notch. When the first excitation coil and the second excitation coil are energized, a magnetic field is generated in the excitation core, and the direction of the magnetic field at the notch of the excitation core is perpendicular to the magnetic control memory alloy, making it elongate, pushing the valve core to move to the right, and compressing Return spring, the conical frustum on the spool leaves the second cylindrical cavity on the left, so that the two oil passages of P ₁ port and P ₂ port are connected to realize the opening of the on-off valve; in the case of power failure, the excitation core The magnetic field disappears, the magnetic control memory alloy stops elongation, the return spring pushes the spool to move to the left, and the conical platform on the spool covers the cylindrical cavity in the middle part of the valve body, so that the two oils of P ₁ port and P ₂ port The circuit is disconnected to realize the closing of the switching valve.

Therefore, the utility model has the following advantages compared with the prior art:

1. The utility model adopts the magnetic control memory alloy and the return spring to provide the power of axial movement. Since the output displacement of the left magnetic control memory alloy and the right magnetic control memory alloy is large, the output force is large, the control precision is high, and the response time is less than 1ms. It has the characteristics of large deformation, large output force and fast deformation response, so as to ensure that the valve core can respond quickly during work. the

2. The utility model uses the magnetic control memory alloy to provide the power for axial movement, without complex motors and other equipment, so the structure is simple, the operation is convenient, and it is easy to maintain later. the

3. In the utility model, the left sealing ring is installed on the hole wall of the left valve cover and the right sealing ring is installed on the hole wall of the right valve cover to prevent leakage caused by the gap between the valve cover and the valve core, so that the switch valve has a good seal sex. the

4. The utility model adopts water cooling to cool down the power system, which can effectively prevent the temperature around the magnetic control memory alloy from being too high and improve the working effect. the

5. The utility model adopts a top base made of non-magnetic materials, a cooling water pipe coated with non-magnetic materials, and non-magnetic protective covers at both ends, so that the magnetic field environment is stable and the interference is small. the

Therefore, the utility model has the characteristics of high frequency response, large output force, simple structure, strong anti-interference and easy maintenance, and has a better market prospect. the

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is the A-A direction view of Fig. 1;

Fig. 3 is the schematic diagram of the shape of the cooling water pipe 3 in Fig. 1;

FIG. 4 is a schematic diagram of the shape of the top seat 6 in FIG. 1 . the

Detailed ways

The utility model will be further described below in conjunction with the drawings and specific embodiments, which is not intended to limit its protection scope. the

Example 1

A high-response direct-acting on-off valve. As shown in FIG. 1 , the high-speed switching valve is composed of a driving device 12 and an oil circuit control device 17 . The driving device 12 is fixed on the left side of the oil circuit control device 17 , and the left end of the valve core 15 in the oil circuit control device 17 is connected with the magnetic control memory alloy 5 . the

The structure of the driving device 12 is shown in Figure 1: the excitation core 8 is installed between the first support plate 4 and the second support plate 10, and the first support plate 4, the excitation core 8 and the second support plate 10 are fixed by bolts On the support 11. The magnetron memory alloy 5 is located in the center of the notch of the excitation core 8 , the left end of the magnetron memory alloy 5 is installed in the blind hole of the top seat 6 , and the top seat 6 is embedded in the blind hole of the first support plate 4 . The first excitation coil 2 is wound on one side of the excitation core 8 adjacent to the notch side, and the second excitation coil 9 is wound on the other side of the excitation core 8 adjacent to the notch side. The first cooling water pipe 3 and the second cooling water pipe 7 are respectively wrapped on the two short sides of the notch of the excitation core 8; the support 11 and the non-magnetic protective cover 1 are fixed on the left side of the oil circuit control device 17, and the magnetic control Memory alloy 5 is coaxial with oil circuit control device 17 . the

The structure of the oil circuit control device 17 is shown in FIG. 1 : the left valve cover 13 is installed on the left side of the valve body 16 , and the right valve cover 19 is installed on the right side of the valve body 16 . The inside of the valve body 16 is composed of four cylindrical cavities connected by coaxial lines. The first cavity on the left communicates with the _P1 port of one oil circuit, and the second cavity on the right communicates with the _P2 port of the other oil circuit. connected. The spool 15 is coaxially installed in the valve body 16, the middle part of the spool 15 is a cylindrical boss, the left side of the cylindrical boss is a truncated cone, and the diameter of the second cavity on the left is between that of the truncated cone. between the largest and smallest diameters. The right end of spool 15 stretches into the central hole of right bonnet 19 and contacts with the return spring 20 in the central hole, and the left end of spool 15 stretches out left bonnet 13 and bearing 11 and is connected with magnetron memory alloy 5.

As shown in Figure 1, the hole wall of the left valve cover 13 is equipped with a left sealing ring 14, and the hole wall of the right valve cover 19 is equipped with a right sealing ring 18. the

As shown in FIG. 2 , the excitation core 8 is in the shape of a square ring, and there is a gap in the middle of one side of the square ring. the

As shown in Figure 3, the first cooling water pipe 3 is a rectangular pipe, one end of the rectangular pipe is a water inlet, and the other end is a water outlet, and the surface of the rectangular pipe is coated with a magnetic isolation material; the first cooling water pipe 3 and the second The cooling water pipe 7 is the same. the

As shown in Figure 4, the top seat 6 is a "T" shaped cylinder, the diameter of the cylinder on the left side of the top seat 6 is greater than the diameter of the right cylinder, the right end of the top seat 6 has a blind hole, and the top seat 6 has a blind hole. The material is magnetic isolation material. the

The connection between the left end of the spool (15) and the magnetic control memory alloy (5) refers to: the center of the left end face of the spool (15) has a blind hole, and the right end of the magnetic control memory alloy (5) is placed in the valve Core (15) left end has blind hole. the

Due to the adoption of the above-mentioned technical scheme, the magnetic control memory alloy 5 of the present utility model is located at the center position of the gap edge of the excitation core 8, the left end of the magnetic control memory alloy 5 is installed in the blind hole of the top seat 6, and the right end of the magnetic control memory alloy is installed in the In the blind hole at the left end of the spool 15, the first excitation coil 2 is wound on one side of the excitation core 8 adjacent to the notch side, and the second excitation coil 9 is wound on the other side of the excitation core 8 adjacent to the notch side. side. When the first exciting coil 2 and the second exciting coil 9 are energized, a magnetic field is generated in the exciting core 8, and the direction of the magnetic field at the notch of the exciting core 8 is perpendicular to the magnetic control memory alloy 5, making it elongate and pushing the spool 15 moves to the right, compresses the return spring 20, and the conical truncated spool 15 leaves the second cylindrical cavity on the left, so that the two oil passages of P ₁ port and P ₂ port are connected to realize the opening of the on-off valve; In the case of , the magnetic field in the excitation core 8 disappears, the magnetic control memory alloy 5 stops elongation, the return spring 20 pushes the spool to move to the left, and the truncated cone on the spool covers the cylindrical cavity in the middle of the valve body. Disconnect the two oil circuits of _P1 port and _P2 port to realize the closing of the on-off valve.

Therefore, this embodiment has the following advantages compared with the prior art:

1. In this specific embodiment, the magnetic control memory alloy 5 and the return spring 20 are used to provide the power for axial movement. Due to the large output displacement of the left magnetic control memory alloy and the right magnetic control memory alloy, the output force is large, the control accuracy is high, and the response time is short. Less than 1ms, it has the characteristics of large deformation, large output force and fast deformation response, so as to ensure that the valve core can respond quickly during work. the

2. In this specific embodiment, the magnetic control memory alloy 5 is used to provide power for axial movement, and there is no complicated motor and other equipment, so the structure is simple, the operation is convenient, and it is easy to maintain later. the

3. In this specific embodiment, a left sealing ring 14 is installed on the hole wall of the left valve cover 13 and a right sealing ring 18 is installed on the hole wall of the right valve cover 19 to prevent leakage caused by the gap between the valve cover and the valve core, so that the switch The valve has good sealing. the

4. This embodiment adopts water cooling to cool down the temperature of the power system, which can effectively prevent the temperature around the magnetic control memory alloy 5 from being too high and improve the working effect. the

5. This specific embodiment adopts the top seat 6 made of non-magnetic materials, the cooling water pipe coated with non-magnetic materials and non-magnetic protective covers at both ends, so that the magnetic field environment is stable and the interference is small. the

Therefore, this specific embodiment has the characteristics of high frequency response, large output force, simple structure, strong anti-interference and easy maintenance, and has a good market prospect. the

Claims (5)

1. the high direct-acting type switch valve frequently that rings, is characterized in that the described high direct-acting type switch valve frequently that rings is made up of drive unit (12) and oil route controller (17); Drive unit (12) is fixed on the left side of oil route controller (17), and the left end of the spool (15) in oil route controller (17) is connected with magnetic control memory alloy (5);

The structure of drive unit (12) is: field core (8) is arranged between the first dunnage (4) and the second dunnage (10), and the first dunnage (4), field core (8) and the second dunnage (10) are bolted on bearing (11); Magnetic control memory alloy (5) is positioned at the center position place on field core (8) breach limit, magnetic control memory alloy (5) left end is contained in the blind hole of footstock (6), and footstock (6) is embedded in the blind hole of the first dunnage (4); The first field coil (2) is wrapped in a limit adjacent with breach limit of field core (8), and the second field coil (9) is wrapped in another limit adjacent with breach limit of field core (8); Two minor faces on field core (8) breach limit are enclosed with the first water-cooling tube (3) and the second water-cooling tube (7) accordingly; Bearing (11) and non-magnetic safety cover (1) are fixed on the left side of oil route controller (17), magnetic control memory alloy (5) and oil route controller (17) coaxial line;

The structure of oil route controller (17) is: left valve gap (13) is arranged on the left side of valve body (16), and right valve gap (19) is arranged on the right side of valve body (16); The cylindrical cavity that the inside of valve body (16) is communicated by four sections of coaxial lines forms, the P of first left cavity and an oil circuit ₁mouth communicates, the P of second right cavity and another oil circuit ₂mouth communicates; Be arranged in valve body (16) spool (15) coaxial line, the intermediate portion of spool (15) is cylindrical boss, the left side of cylindrical boss is circular cone, and the diameter of second left cavity is between the maximum diameter and minimum diameter of circular cone; The right-hand member of spool (15) puts in the center hole of right valve gap (19) and contacts with the returning spring (20) in center hole, and the left end of spool (15) stretches out left valve gap (13) and is connected with magnetic control memory alloy (5) with bearing (11);

The hole wall of left valve gap (13) is equipped with left seal ring (14), and the hole wall of right valve gap (19) is equipped with right seal ring (18).

2. the high direct-acting type switch valve frequently that rings according to claim 1, is characterized in that described field core (8) is for square ring, and the neutral position place on a limit of square ring has breach.

3. the high direct-acting type switch valve frequently that rings according to claim 1, is characterized in that described the first water-cooling tube (3) is rectangular tube, and one end of rectangular tube is water intake, and the other end is water outlet, and the surface of rectangular tube scribbles NULL; The first water-cooling tube (3) is identical with the second water-cooling tube (7).

4. the high direct-acting type switch valve frequently that rings according to claim 1, it is characterized in that described footstock (6) is " T " font cylindrical body, the cylinder diameter on footstock (6) left side is greater than the cylinder diameter on the right, the right-hand member of footstock (6) has blind hole, and the material of footstock (6) is NULL.

5. the high direct-acting type switch valve frequently that rings according to claim 1, the left end that it is characterized in that described spool (15) is connected and refers to magnetic control memory alloy (5): the center of the left end end face of spool (15) has blind hole, and the right-hand member of magnetic control memory alloy (5) is placed in the blind hole of spool (15) left end.

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