A single-coil high-speed switching valve

Abstract

The present invention belongs to the technical field of switch valves and discloses a single-coil high-speed switch valve, comprising a valve seat, a valve core, and a single-coil assembly. A sliding channel is formed within the valve seat, the sliding channel comprising a first inner circular wall and a second inner circular wall disposed adjacent to each other, an oil inlet being provided at the first inner circular wall, and an oil outlet being provided at the second inner circular wall. A valve core is disposed within the sliding channel, the valve core comprising a first outer circular wall and a second outer circular wall disposed adjacent to each other, the outer diameter of the first outer circular wall being larger than the inner diameter of the first inner circular wall and smaller than the inner diameter of the second inner circular wall, the outer diameter of the second outer circular wall being matched to the inner diameter of the first inner circular wall, an annular groove being disposed between the first outer circular wall and the second outer circular wall, the valve core being switchable between a first position and a second position for opening or closing the oil inlet and the oil outlet, and a chamfered corner being formed at the junction of the first inner circular wall and the second inner circular wall. The present invention effectively extends the service life of a miniature high-speed switch valve through a reliable structural design.

Description

Technical Field

[0001] The present invention belongs to the technical field of switch valves, and in particular relates to a single-coil high-speed switch valve. Background Art

[0002] A miniature high-speed on-off valve is a valve body that strives to meet extreme standards such as high power density, high dynamics, and high reliability in extreme environments such as strong vibration, strong impact, and strong heat, and in a tiny space. Currently, when using such valves, there is usually a problem of rapid wear. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention discloses a single-coil high-speed switching valve, which effectively extends the service life of the miniature high-speed switching valve through reliable structural design.

[0004] The specific technical solutions of the present invention are as follows:

[0005] A single-coil high-speed switching valve, comprising:

[0006] The valve seat has a sliding channel formed inside the valve seat, and the sliding channel has a first inner circular wall and a second inner circular wall arranged adjacent to each other, the first inner circular wall is provided with an oil inlet, and the second inner circular wall is provided with an oil outlet

[0007] a valve core disposed in the sliding channel, the valve core having a first outer circular wall and a second outer circular wall disposed adjacent to each other, the outer diameter of the first outer circular wall being larger than the inner diameter of the first inner circular wall and smaller than the inner diameter of the second inner circular wall, the outer diameter of the second outer circular wall being matched with the inner diameter of the first inner circular wall, an annular groove being provided between the first outer circular wall and the second outer circular wall, the valve core being switchable between a first position and a second position for opening or blocking the oil inlet and the oil outlet; and

[0008] Single coil assembly, used to drive the valve core to slide in the valve seat;

[0009] Wherein, the connection between the first inner circular wall and the second inner circular wall has a rounded corner.

[0010] Preferably, the single coil assembly comprises:

[0011] a cover shell, wherein the cover shell is detachably connected to the valve seat;

[0012] A push rod is disposed in the housing, and one end of the push rod is connected to the valve core;

[0013] An armature, wherein the armature is disposed in the housing, one end of the armature being internally connected to an end of the push rod away from the valve core, and the other end of the armature being connected to the housing via a support spring; and

[0014] a coil wound around the outside of the armature and located in the housing;

[0015] Wherein, one end of the valve core away from the armature is connected to the valve body through a return spring, and the armature has a displacement space in the housing.

[0016] Preferably, the single coil assembly further comprises:

[0017] a yoke, the yoke being arranged inside the housing and between the armature and the valve seat;

[0018] One end of the push rod passes through the yoke and is connected to the valve core, and the yoke abuts against the valve seat.

[0019] Preferably, a blind hole is provided at one end of the armature away from the valve core, and the support spring is located in the blind hole.

[0020] Preferably, a magnetic isolation gasket is provided between the end of the armature away from the yoke and the cover shell.

[0021] Preferably, the single coil assembly further comprises:

[0022] A winding shell, the winding shell being arranged between the inner wall of the cover shell and the armature, the winding shell having a winding space;

[0023] The coil is wound in the winding space; in the axial projection of the switch valve, a portion of the coil overlaps with the armature, and another portion overlaps with the yoke;

[0024] One end of the yoke is engaged between the winding shell and the valve seat.

[0025] Preferably, it also includes:

[0026] A guide sleeve, the guide sleeve being arranged on the second inner circular wall;

[0027] Wherein, the end of the first outer circular wall away from the second outer circular wall has a third outer circular wall, and the outer diameter of the third outer circular wall matches the inner diameter of the guide sleeve.

[0028] Preferably, the valve core is provided with an axial oil drain channel, the end of the valve core close to the guide sleeve is provided with a first through hole, and the end of the valve seat away from the guide sleeve is provided with a first oil drain port;

[0029] The oil drain channel, the first through hole, and the first oil drain port are in communication.

[0030] Preferably, there is a first gap between the yoke and the top rod, a second gap between the armature and the winding shell, the magnetic isolation gasket is provided with a second through hole, and the cover shell is provided with a second oil drain port; the first gap, the second gap, the second through hole, and the second oil drain port are connected when the armature moves toward the end away from the yoke.

[0031] Preferably, the cover shell is threadedly connected to the valve seat.

[0032] Compared with the prior art, the present invention can avoid valve body wear caused by oil erosion, thereby extending the service life of the switch valve on the basis of its high-speed response capability; the present invention realizes the switching of the switch valve through a single coil and has a relatively simple structure; in addition, the present invention can discharge excess leaked oil out of the valve body and / or cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the valve core in an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of a sharp corner in the prior art;

[0036] Figure 4 Schematic diagram of rounded corners in an embodiment of the present invention.

[0037] In the figure: 1-valve seat; 2-valve core; 3-first inner circular wall; 4-second inner circular wall; 5-oil inlet; 6-oil outlet; 7-first outer circular wall; 8-second outer circular wall; 9-ring groove; 10-rounded corner; 11-cover shell; 12-top rod; 13-armature; 14-coil; 15-support spring; 16-reset spring; 17-yoke; 18-magnetic isolation gasket; 19-winding shell; 20-guide sleeve; 21-oil drain channel; 22-first through hole; 23-first oil drain port; 24-second through hole; 25-second oil drain port; 26-third outer circular wall; 27-pointed corner. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0039] like Figures 1 and 2 、 Figure 4As shown, a single-coil 14 high-speed switching valve includes a valve seat 1, a valve core 2 and a single coil 14 component; a sliding channel is formed inside the valve seat 1, and the sliding channel has a first inner circular wall 3 and a second inner circular wall 4 arranged adjacent to each other, an oil inlet 5 is provided at the first inner circular wall 3, and an oil outlet 6 is provided at the second inner circular wall 4; the valve core 2 is arranged in the sliding channel, and the valve core 2 has a first outer circular wall 7 and a second outer circular wall 8 arranged adjacent to each other, the outer diameter of the first outer circular wall 7 is larger than the inner diameter of the first inner circular wall 3, and smaller than the inner diameter of the second inner circular wall 4, the outer diameter of the second outer circular wall 8 is matched with the inner diameter of the first inner circular wall 3, and an annular groove 9 is provided between the first outer circular wall 7 and the second outer circular wall 8, the valve core 2 switches between the first position and the second position, for opening or blocking the oil inlet 5 and the oil outlet 6; the single coil 14 component is used to drive the valve core 2 to slide in the valve seat 1; the connection between the first inner circular wall 3 and the second inner circular wall 4 has a chamfered corner 10.

[0040] In this embodiment, the first position is located on the left side of the valve seat 1, and the second position is located on the right side of the valve seat 1. Therefore, when the valve core 2 moves from the first position to the second position, the oil inlet 5 and the oil outlet 6 are gradually blocked. As the annular groove 9 and the second inner wall 4 gradually approach each other, the oil flow rate increases. At this time, if the following method is used: Figure 3 In the prior art shown, the junction between the first inner circular wall 3 and the second inner circular wall 4 is a sharp corner 27 structure. Since the impact force of the oil at this location increases, the sharp corner 27 is eroded.

[0041] When the rounded corner 10 is adopted, the stress can be effectively relieved, so that the oil can smoothly transition from the oil passage port to the oil outlet port 6, thereby extending the service life of the switch valve.

[0042] In order to better use this embodiment, the single coil 14 assembly includes a cover 11, a push rod 12, an armature 13 and a coil 14; the cover 11 is detachably connected to the valve seat 1; the push rod 12 is arranged in the cover 11, and one end of the push rod 12 is connected to the valve core 2; the armature 13 is arranged in the cover 11, and one end of the armature 13 is connected to the end of the push rod 12 away from the valve core 2, and the other end is connected to the cover 11 through a support spring 15; the coil 14 is wound on the outside of the armature 13 and is located in the cover 11; the end of the valve core 2 away from the armature 13 is connected to the valve body through a reset spring 16, and the armature 13 has a displacement space in the cover 11.

[0043] In the specific use of this embodiment, the coil 14 is energized to generate magnetism, driving the armature 13 to move in the axial direction of the switch valve, thereby pushing and pulling the valve core 2 through the push rod 12 to achieve the conduction or blocking of the oil port and the oil outlet 6.

[0044] During the movement, the return spring 16 and the support spring 15 are compressed and / or restored accordingly, thereby accelerating the switching of the switching valve while ensuring that the armature 13 has movement stability.

[0045] In order to better use this embodiment, the single coil 14 assembly also includes a yoke 17, which is arranged inside the cover 11 and located between the armature 13 and the valve seat 1; one end of the push rod 12 passes through the yoke 17 and is connected to the valve core 2, and the yoke 17 is against the valve seat 1.

[0046] The yoke 17 can enhance the electromagnetic attraction of the coil 14 and confine the magnetic lines of force generated by the coil 14 inside, thereby improving the use efficiency of the electromagnet.

[0047] The yoke 17 is fixed relative to the valve seat 1 , that is, when the armature 13 moves, the yoke 17 is stationary.

[0048] In order to better utilize this embodiment, a blind hole is provided at one end of the armature 13 away from the valve core 2 , and the support spring 15 is located in the blind hole.

[0049] The blind hole is located at the left end of the armature 13 , which can provide good support for the armature 13 and reduce the space used by the support spring 15 .

[0050] In order to better utilize this embodiment, a magnetic isolation gasket 18 is provided between the end of the armature 13 away from the yoke 17 and the cover 11 .

[0051] The magnetic isolation gasket 18 can achieve magnetic isolation and prevent the external environment from having adverse effects on the magnetic field.

[0052] In order to better use this embodiment, the single coil 14 component also includes a winding shell 19, which is arranged between the inner wall of the cover shell 11 and the armature 13, and the winding shell 19 has a winding space; the winding is wound in the winding space; in the axial projection of the switch valve, a part of the coil 14 overlaps with the armature 13, and the other part overlaps with the yoke 17; one end of the yoke 17 is clamped between the winding shell 19 and the valve seat 1.

[0053] In this embodiment, the yoke 17 has a T-shaped structure in its axial projection, whereby its double-arm ends are engaged between the winding shell 19 and the valve seat 1, and the fixed installation can be completed by utilizing the detachable relationship between the cover shell 11 and the valve seat 1.

[0054] In order to better use this embodiment, it also includes a guide sleeve 20, which is arranged on the second inner circular wall 4; the first outer circular wall 7 has a third outer circular wall 26 at one end away from the second outer circular wall 8, and the outer diameter of the third outer circular wall 26 matches the inner diameter of the guide sleeve 20.

[0055] The guide sleeve 20 ensures better linear motion for the valve core 2. In this embodiment, the valve core 2 comprises, from left to right, a third outer circular wall 26, a first outer circular wall 7, and a second outer circular wall 8. Specifically, the right end of the annular groove 9 forms the second outer circular wall 8, while the left end forms the first outer circular wall 7. Thus, the guide sleeve 20 provides support for the valve core 2 at the third outer circular wall 26 and ensures linear motion for the valve core 2. It is apparent that the outer diameters of the third outer circular wall 26 and the second outer circular wall 8 are equal.

[0056] In order to better use this embodiment, the valve core 2 is provided with an axial oil drain channel 21, the valve core 2 is provided with a first through hole 22 at one end close to the guide sleeve 20, and the valve seat 1 is provided with a first oil drain port 23 at one end away from the guide sleeve 20; the oil drain channel 21, the first through hole 22, and the first oil drain port 23 are connected.

[0057] When the oil enters the interior of the guide sleeve 20, the oil can enter the oil drain channel 21 through the first through hole 22 and then be discharged through the first oil drain port 23. At this time, no matter which position the valve core 2 is located relative to the valve seat 1, oil drain can be achieved.

[0058] In order to better use this embodiment, there is a first gap between the yoke 17 and the top rod 12, a second gap is provided between the armature 13 and the winding shell 19, the magnetic isolation gasket 18 is provided with a second through hole 24, and the cover shell 11 is provided with a second oil drain port 25; the first gap, the second gap, the second through hole 24, and the second oil drain port 25 are connected when the armature 13 moves toward the end away from the yoke 17.

[0059] During the movement of the armature 13, if the valve core 2 moves to the right, the above path is blocked, and if the valve core 2 moves to the left, the above path is connected, and oil can be drained.

[0060] In order to better use this embodiment, the cover shell 11 is threadedly connected to the valve seat 1 .

[0061] In this embodiment, the housing 11 has an internal thread, and the valve seat 1 has an external thread. Therefore, when the internal thread and the external thread match, the housing 11 and the valve seat 1 are connected.

[0062] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A single-coil high-speed switching valve, characterized in that: include: A valve seat, wherein a sliding channel is formed inside the valve seat, and the sliding channel has a first inner circular wall and a second inner circular wall arranged adjacent to each other, an oil inlet is provided at the first inner circular wall, and an oil outlet is provided at the second inner circular wall; A valve core is disposed in the sliding channel, the valve core having a first outer circular wall and a second outer circular wall disposed adjacent to each other, the outer diameter of the first outer circular wall being larger than the inner diameter of the first inner circular wall and smaller than the inner diameter of the second inner circular wall, the outer diameter of the second outer circular wall being matched with the inner diameter of the first inner circular wall, an annular groove being provided between the first outer circular wall and the second outer circular wall, the valve core being switched between a first position and a second position for opening or blocking the oil inlet and the oil outlet; as well as Single coil assembly, used to drive the valve core to slide in the valve seat; Wherein, the junction between the first inner circular wall and the second inner circular wall has a rounded corner; The single coil assembly comprises: a cover shell, wherein the cover shell is detachably connected to the valve seat; A push rod is disposed in the housing, and one end of the push rod is connected to the valve core; An armature, wherein the armature is disposed in the housing, one end of the armature being internally connected to an end of the push rod away from the valve core, and the other end of the armature being connected to the housing via a support spring; and a coil wound around the outside of the armature and located in the housing; The end of the valve core away from the armature is connected to the valve body through a return spring, and the armature has a displacement space in the housing; The single coil assembly further comprises: a yoke, the yoke being arranged inside the housing and between the armature and the valve seat; One end of the push rod passes through the yoke and is connected to the valve core, and the yoke abuts against the valve seat.

2. A single-coil high-speed switching valve according to claim 1, characterized in that: A blind hole is provided at one end of the armature away from the valve core, and the support spring is located in the blind hole.

3. The single-coil high-speed switching valve according to claim 1, characterized in that: A magnetic isolation gasket is provided between the end of the armature away from the yoke and the cover shell.

4. A single-coil high-speed switching valve according to claim 3, characterized in that: The single coil assembly further comprises: A winding shell, the winding shell being arranged between the inner wall of the cover shell and the armature, the winding shell having a winding space; The coil is wound in the winding space; in the axial projection of the switch valve, a portion of the coil overlaps with the armature, and another portion overlaps with the yoke; One end of the yoke is engaged between the winding shell and the valve seat.

5. The single-coil high-speed switching valve according to claim 1, characterized in that: Also includes: A guide sleeve, the guide sleeve being arranged on the second inner circular wall; Wherein, the end of the first outer circular wall away from the second outer circular wall has a third outer circular wall, and the outer diameter of the third outer circular wall matches the inner diameter of the guide sleeve.

6. A single-coil high-speed switching valve according to claim 5, characterized in that: The valve core is provided with an axial oil drain passage, the end of the valve core close to the guide sleeve is provided with a first through hole, and the end of the valve seat away from the guide sleeve is provided with a first oil drain port; The oil drain channel, the first through hole, and the first oil drain port are in communication.

7. The single-coil high-speed switching valve according to claim 4, characterized in that: There is a first gap between the yoke and the top rod, a second gap between the armature and the winding shell, a second through hole is provided on the magnetic isolation gasket, and a second oil drain port is provided on the cover shell; the first gap, the second gap, the second through hole, and the second oil drain port are connected when the armature moves toward the end away from the yoke.

8. The single-coil high-speed switching valve according to claim 1, characterized in that: The cover shell is threadedly connected to the valve seat.

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