Two-position three-way micro large flow electromagnetic valve hydraulic assembly

Abstract

The application provides a two-position three-way micro large-flow electromagnetic valve hydraulic assembly, which comprises a valve sleeve with a fourth channel and a fifth channel, a first steel ball seat arranged in the valve sleeve, wherein the first steel ball seat is in interference fit with the valve sleeve, a spool arranged in the valve sleeve, one end of the spool extending into the first steel ball seat, and a first working cavity being formed between one end surface of the spool and the first steel ball seat, wherein the spool has a first channel, a second channel, a sealing ring surface, and a cavity in communication with the first channel, and a second working cavity is formed between the sealing ring surface and the valve sleeve; the multi-acting surface double-valve-port spool structure in the application can realize valve port opening or closing through force balance change when the pilot is turned on or off, thereby realizing oil path switching, the pilot part is integrated in the spool, miniaturization, three-way and large-flow high integration are realized, and the volume and weight are greatly reduced.

Description

Technical Field

[0001] This application belongs to the field of electromagnetic valve technology, specifically relating to a two-position three-way miniature high-flow electromagnetic valve hydraulic assembly. Background Technology

[0002] Solenoid valves are a common component in hydraulic control systems, widely used in aviation, aerospace, and engineering machinery. In hydraulic control systems, solenoid valves can adjust parameters such as the flow rate, direction, and speed of the medium. They can be used with different circuits to achieve the desired control, offering good precision and flexibility.

[0003] Currently, existing high-flow solenoid valves typically consist of a main valve and a pilot valve, and generally suffer from the disadvantages of large size and weight. In addition, most are two-position, two-way solenoid valves, which cannot achieve oil circuit switching function. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a hydraulic assembly for a two-position three-way miniature high-flow solenoid valve, the hydraulic assembly comprising:

[0005] The valve sleeve has a fourth channel and a fifth channel;

[0006] A first steel ball seat is disposed inside the valve sleeve; wherein the first steel ball seat is interference-fitted with the valve sleeve;

[0007] A slide valve is disposed within the valve sleeve, with one end of the slide valve extending into the first steel ball seat, and a first working chamber formed between one end face of the slide valve and the first steel ball seat; wherein, the slide valve has a first channel, a second channel, a sealing ring surface, and a cavity communicating with the first channel, and a second working chamber formed between the sealing ring surface and the valve sleeve;

[0008] When one end face of the slide valve is sealed, the medium enters the cavity and the second working chamber from the other end face of the slide valve through the first and second channels, thereby generating a third thrust on the other end face of the slide valve, a first thrust on the cavity annular surface of the cavity, and a second thrust on the sealing annular surface in the second working chamber. Under the action of the first, second, and third thrusts, the slide valve moves towards the first steel ball seat, thereby connecting the fourth and fifth channels; wherein, the third thrust is greater than the resultant force of the first and second thrusts.

[0009] When one end of the slide valve is open, the medium enters the cavity, the first working chamber, and the second working chamber from the other end of the slide valve through the first and second channels. This generates a third thrust on the other end of the slide valve, a fourth thrust on the end face of the slide valve, a first thrust on the cavity annular surface, and a second thrust on the sealing annular surface in the second working chamber. Under the action of the first, second, third, and fourth thrusts, the slide valve moves away from the first steel ball seat, thereby connecting the second and fifth channels. The third thrust is less than the resultant force of the first, second, and fourth thrusts.

[0010] Preferably, the first steel ball seat has a through hole, and the hydraulic assembly further includes:

[0011] A valve core is disposed in the through hole, and a clearance fit is formed between the valve core and the first steel ball seat;

[0012] A second steel ball seat is disposed within the cavity; wherein the second steel ball seat has a third channel;

[0013] Steel balls are used to seal third channels or through holes.

[0014] Preferably, when the solenoid valve is de-energized, the valve core pushes the steel ball to move under the action of the spring force. The steel ball enters the sealing ring surface of the second steel ball seat to seal the third channel. The medium enters the cavity and the second working chamber from the other end face of the slide valve through the first channel, the second channel and the third channel, thereby generating a third thrust on the other end face of the slide valve, a first thrust on the cavity ring surface of the cavity, and a second thrust on the sealing ring surface in the second working chamber. Under the action of the first thrust, the second thrust and the third thrust, the slide valve moves towards the first steel ball seat, thereby connecting the fourth channel and the fifth channel; wherein, the third thrust is greater than the resultant force of the first thrust and the second thrust.

[0015] Preferably, when the solenoid valve is energized, the electromagnetic force overcomes the spring force, and the medium first passes through the first and second channels from the other end face of the slide valve, enters the cavity and the second working chamber, and then pushes the steel ball to the through hole through the third channel and enters the first working chamber. This generates a third thrust on the other end face of the slide valve, a fourth thrust on the end face of the slide valve, a first thrust on the cavity ring surface of the cavity, and a second thrust on the sealing ring surface in the second working chamber. Under the action of the first, second, third, and fourth thrusts, the slide valve moves away from the first steel ball seat, thereby connecting the second and fifth channels. The third thrust is less than the resultant force of the first, second, and fourth thrusts.

[0016] Preferably, the hydraulic assembly further includes:

[0017] An oil filter is located on the other end face of the spool valve, and the oil filter is used to filter impurities in the hydraulic oil.

[0018] Preferably, the hydraulic assembly further includes:

[0019] A sealing element is disposed at one end of the valve sleeve, the sealing element being used to seal the gap between the valve sleeve and the mounting hole.

[0020] Preferably, the hydraulic assembly further includes:

[0021] A sealing ring is disposed between the second steel ball seat and the slide valve, and also between the first steel ball seat and the slide valve.

[0022] Preferably, the sealing ring includes an O-ring.

[0023] The beneficial technical effects of this application are as follows:

[0024] The multi-acting surface dual-port slide valve structure provided in this application can realize the opening or closing of the valve port by the force balance change when the pilot is turned on or off, thereby realizing the oil circuit switching; the pilot part is integrated inside the slide valve, realizing miniaturization, three-way and high flow integration, greatly reducing the size and weight. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a two-position three-way miniature high-flow solenoid valve hydraulic assembly provided in an embodiment of this application. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of a two-position three-way miniature high-flow solenoid valve hydraulic assembly provided in an embodiment of this application. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the slide valve structure of a two-position three-way miniature high-flow solenoid valve hydraulic assembly provided in an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the first steel ball seat of a hydraulic assembly for a two-position three-way miniature high-flow solenoid valve provided in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of the second steel ball seat of a hydraulic assembly for a two-position three-way miniature high-flow solenoid valve provided in an embodiment of this application;

[0030] Wherein: 1-valve sleeve; 2-first steel ball seat; 3-valve core; 4-second steel ball seat; 5-slide valve; 501-cavity; 502-sealing groove; 503-sealing ring surface; 6-oil filter; 7-seal; 8-O-ring seal; 9-steel ball; 10-first working chamber; 11-second working chamber; 13-first channel; 14-second channel; 15-third channel; 16-fourth channel; 17-fifth channel; 18-return oil channel; 19-through hole. Detailed Implementation

[0031] Please see Figure 1-5 Based on the ordinary two-position three-way normally closed solenoid valve structure, this application designs a novel two-position three-way miniature high-flow solenoid valve hydraulic component, which reduces size and weight while integrating oil circuit switching and high-flow performance.

[0032] In this embodiment, a two-position three-way miniature high-flow solenoid valve hydraulic assembly is provided, comprising a valve sleeve, a first steel ball seat, a valve core, a second steel ball seat, a spool valve, an oil filter, and seals. When the solenoid valve is energized, oil enters the hydraulic assembly through the oil filter. A portion enters the first working chamber formed between the first steel ball seat and one end face of the spool valve via the first and third channels, generating a fourth thrust on the end face of the spool valve; a portion acts directly on the other end face of the spool valve, generating a third thrust; a portion enters the cavity formed between the second steel ball seat and the spool valve via the first channel on the spool valve, generating a first thrust on the annular surface of the spool valve cavity; and a portion enters the second working chamber formed between the spool valve sealing annular surface and the valve sleeve via the second channel on the other end face of the spool valve, generating a second thrust on the sealing annular surface of the spool valve. The third thrust acting on the spool valve is less than the combined force of the first, second, and fourth thrusts. In this state, the spool valve moves away from the first steel ball seat. At this time, the second and fifth channels are connected, while the fourth and fifth channels are disconnected.

[0033] When the solenoid valve is de-energized, the hydraulic fluid enters the hydraulic assembly through the oil filter. A portion flows through the first channel and then into the third channel. At this point, under the spring force, the valve core pushes the steel ball into the sealing ring of the second steel ball seat, sealing the third channel. The hydraulic fluid, blocked by the steel ball, returns to the third channel and the cavity formed between the second steel ball seat and the spool valve. A portion acts directly on the other end face of the spool valve, generating a third thrust. A portion enters the cavity formed between the second steel ball seat and the spool valve through the first channel, generating a first thrust on the cavity ring of the spool valve. A portion enters the second working cavity formed between the spool valve's sealing ring and the valve sleeve through the second channel on the other end face of the spool valve, generating a second thrust on the sealing ring of the spool valve. The third thrust acting on the spool valve is greater than the combined force of the first and second thrusts. In this state, the spool valve moves towards the first steel ball seat. At this time, the second and fifth channels are disconnected, while the fourth and fifth channels are connected.

[0034] It should be noted that the multi-acting sealing annular dual-port spool valve structure can achieve the opening or closing of the valve port through the force balance change when the pilot is turned on or off, thereby realizing the oil circuit switching; the pilot part is integrated inside the spool valve, realizing miniaturization, three-way and high flow integration, greatly reducing the size and weight. The spool valve achieves dynamic sealing with the first and second ball seats via O-rings, ensuring sealing performance while reducing cost and structural complexity. The two valve ports of the spool valve employ a spherical sealing ring structure, providing excellent sealing and short on / off times. The end face sealing rings of the first and second ball seats are achieved through a ball-pressing process, using steel balls of the same specification for sealing. Compared to the traditional solenoid valve push-rod sealing method, this provides more stable and effective sealing performance. The spool valve is guided and positioned via a cylindrical surface, with intermittent oil film lubrication and hydraulic support, resulting in better centering and more flexible movement. The spool valve and the second ball seat connect to both sides via a channel, and the pressure drop is generated by controlling the diameter of the control hole. The internal oil circuit of the first ball seat is directly connected to the fourth channel via a hole, resolving the problem of solenoid valve jamming caused by pressure buildup on one side of the valve core during use. The combination of steel balls and the valve core provides stable performance, better resistance to impact and wear, and a longer service life for the hydraulic stage of the solenoid valve. A deformable seal on the outside of the valve sleeve addresses leakage issues with the mounting hole, offering simplicity and reliability.

[0035] In other embodiments of this application, such as Figure 1 The diagram shows the hydraulic assembly structure of a two-position three-way miniature high-flow solenoid valve with this structure. It mainly consists of valve sleeve 1, first steel ball seat 2, valve core 3, second steel ball seat 4, spool valve 5, oil filter 6, seal 7, O-ring seal 8, and steel ball 9.

[0036] When the solenoid valve is energized, oil enters the hydraulic assembly through the oil filter 6. A portion enters the first working chamber 10 formed between the first steel ball seat 2 and one end face of the slide valve 5 via the first channel 13 and the third channel 15, generating a fourth thrust on the end face of the slide valve 5. A portion acts directly on the other end face of the slide valve 5, generating a third thrust. A portion enters the cavity formed between the second steel ball seat 4 and the slide valve 5 via the first channel on the slide valve 5, generating a first thrust on the annular surface of the cavity of the slide valve 5. A portion enters the second working chamber formed between the sealing annular surface of the slide valve 5 and the valve sleeve 1 via the second channel on the other end face of the slide valve 5, generating a second thrust on the sealing annular surface of the slide valve 5. The third thrust acting on the slide valve 5 is less than the combined force of the first, second, and fourth thrusts. In this state, the slide valve 5 moves away from the first steel ball seat 2. At this time, the second channel 14 and the fifth channel 17 are connected, and the fourth channel 16 and the fifth channel 17 are disconnected.

[0037] When the solenoid valve is de-energized, the oil enters the hydraulic assembly through the oil filter 6. A portion flows through the first channel and into the third channel 15. At this time, under the spring force, the valve core 3 pushes the steel ball 9 into the sealing ring of the second steel ball seat 4, sealing the third channel. The oil, blocked by the steel ball 9, returns to the third channel and the cavity formed between the second steel ball seat 4 and the slide valve 5. A portion acts directly on the other end face of the slide valve 5, generating a third thrust. A portion enters the cavity formed between the second steel ball seat 4 and the slide valve 5 through the first channel on the slide valve 5, generating a first thrust on the cavity ring of the slide valve 5. A portion enters the second working cavity 11 formed between the sealing ring of the slide valve 5 and the valve sleeve 1 through the second channel on the other end face of the slide valve 5, generating a second thrust on the sealing ring of the slide valve 5. The third thrust acting on the slide valve 5 is greater than the resultant force of the first and second thrusts. In this state, the slide valve 5 moves towards the first steel ball seat 2. At this time, the second and fifth channels are disconnected, and the fourth and fifth channels are connected.

Claims

1. A hydraulic assembly for a two-position three-way miniature high-flow solenoid valve, characterized in that, The hydraulic assembly includes: The valve sleeve has a fourth channel and a fifth channel; A first steel ball seat is disposed inside the valve sleeve; wherein the first steel ball seat is interference-fitted with the valve sleeve; A slide valve is disposed within the valve sleeve, with one end of the slide valve extending into the first steel ball seat, and a first working chamber formed between one end face of the slide valve and the first steel ball seat; wherein, the slide valve has a first channel, a second channel, a sealing ring surface, and a cavity communicating with the first channel, and a second working chamber formed between the sealing ring surface and the valve sleeve; When one end face of the slide valve is sealed, the medium enters the cavity and the second working chamber from the other end face of the slide valve through the first and second channels, thereby generating a third thrust on the other end face of the slide valve, a first thrust on the cavity annular surface of the cavity, and a second thrust on the sealing annular surface in the second working chamber. Under the action of the first, second, and third thrusts, the slide valve moves towards the first steel ball seat, thereby connecting the fourth and fifth channels; wherein, the third thrust is greater than the resultant force of the first and second thrusts. When one end of the slide valve is open, the medium enters the cavity, the first working chamber, and the second working chamber from the other end of the slide valve through the first and second channels. This generates a third thrust on the other end of the slide valve, a fourth thrust on the end face of the slide valve, a first thrust on the cavity annular surface, and a second thrust on the sealing annular surface in the second working chamber. Under the action of the first, second, third, and fourth thrusts, the slide valve moves away from the first steel ball seat, thereby connecting the second and fifth channels. The third thrust is less than the resultant force of the first, second, and fourth thrusts. The first steel ball seat has a through hole, and the hydraulic assembly further includes: A valve core is disposed in the through hole, and a clearance fit is formed between the valve core and the first steel ball seat; A second steel ball seat is disposed within the cavity; wherein the second steel ball seat has a third channel; Steel balls are used to seal third channels or through holes.

2. The hydraulic assembly of the two-position three-way miniature high-flow solenoid valve according to claim 1, characterized in that, When the solenoid valve is de-energized, the valve core pushes the steel ball to move under the action of the spring force. The steel ball enters the sealing ring surface of the second steel ball seat to seal the third channel. The medium enters the cavity and the second working chamber from the other end face of the slide valve through the first channel, the second channel and the third channel. This generates a third thrust on the other end face of the slide valve, a first thrust on the cavity ring surface of the cavity, and a second thrust on the sealing ring surface in the second working chamber. Under the action of the first thrust, the second thrust and the third thrust, the slide valve moves towards the first steel ball seat, thereby connecting the fourth channel and the fifth channel. The third thrust is greater than the resultant force of the first thrust and the second thrust.

3. The hydraulic assembly of the two-position three-way miniature high-flow solenoid valve according to claim 1, characterized in that, When the solenoid valve is energized, the electromagnetic force overcomes the spring force. The medium enters the cavity and the second working chamber from the other end face of the spool valve through the first and second channels, and then through the third channel, pushing the steel ball to the through hole and into the first working chamber. This generates a third thrust on the other end face of the spool valve, a fourth thrust on the end face of the spool valve, a first thrust on the cavity ring surface of the cavity, and a second thrust on the sealing ring surface in the second working chamber. Under the action of the first, second, third, and fourth thrusts, the spool valve moves away from the first steel ball seat, thereby connecting the second and fifth channels. The third thrust is less than the resultant force of the first, second, and fourth thrusts.

4. The hydraulic assembly of the two-position three-way miniature high-flow solenoid valve according to claim 1, characterized in that, The hydraulic assembly also includes: An oil filter is located on the other end face of the spool valve, and the oil filter is used to filter impurities in the hydraulic oil.

5. The hydraulic assembly of the two-position three-way miniature high-flow solenoid valve according to claim 4, characterized in that, The hydraulic assembly also includes: A sealing element is disposed at one end of the valve sleeve, the sealing element being used to seal the gap between the valve sleeve and the mounting hole.

6. The hydraulic assembly of the two-position three-way miniature high-flow solenoid valve according to claim 5, characterized in that, The hydraulic assembly also includes: A sealing ring is disposed between the second steel ball seat and the slide valve, and also between the first steel ball seat and the slide valve.

7. The hydraulic assembly of the two-position three-way miniature high-flow solenoid valve according to claim 6, characterized in that, The sealing ring includes an O-ring.

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