Electromagnetic drive control valve

Abstract

The application discloses an electromagnetic drive control valve, wherein a main valve core is slidably arranged in an oil cavity, two ends of a first elastic member are elastically abutted against the main valve core and a valve seat respectively, two ends of a second elastic member are elastically abutted against a pilot valve core assembly and an electromagnetic drive assembly respectively, the pilot valve core assembly and the main valve core form a closed cavity, an oil inlet channel is communicated with an oil inlet and the closed cavity, an oil outlet channel is communicated with a second oil outlet, the electromagnetic drive assembly can drive the pilot valve core assembly to disconnect the closed cavity and the oil outlet channel, and the elastic restoring force of the second elastic member can drive the pilot valve core assembly to connect the closed cavity and the oil outlet channel; the hydraulic oil in the closed cavity can drive the main valve core to connect the oil inlet and a first oil outlet, and the elastic restoring force of the first elastic member can drive the main valve core to connect the first oil outlet and the second oil outlet. The electromagnetic drive control valve has the advantages of realizing large-flow oil delivery, reducing the demand for electromagnetic force, improving the service performance and reliability of the electromagnetic drive control valve, and compact structure and small space occupation.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve technology, and more particularly to electromagnetically driven control valves. Background Technology

[0002] For electromagnetic drive control mechanisms, especially those applicable to high-power marine diesel engines, the performance requirements of electromagnetic drive control mechanisms are higher due to the large amount of oil required and the harsh and complex working environment of marine diesel engines. Therefore, in order to be suitable for the large amount of oil required and the harsh and complex working environment of high-power marine diesel engines, an electromagnetic drive control valve structure that can adjust large flow and has high reliability is required.

[0003] The existing two-position three-way electromagnetic drive control valve structure includes pilot-operated electromagnetic drive valve structure and direct-drive electromagnetic drive valve structure. For the pilot-operated electromagnetic drive valve structure, the existing pilot-operated electromagnetic drive valve structure suitable for large flow is complex and not compact, occupies a large space, and has a large requirement for electromagnetic force of the electromagnet. Summary of the Invention

[0004] The purpose of this invention is to provide an electromagnetically driven control valve to solve the problems of complex and non-compact structure, large space occupation, and high electromagnetic force requirement of the electromagnet in the prior art pilot-operated electromagnetically driven valve.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Electromagnetically driven control valve, comprising:

[0007] A valve body and a valve seat are connected to each other, the valve body and the valve seat form an oil cavity, and the valve body is provided with an oil inlet, a first oil outlet and a second oil outlet connected to the oil cavity in sequence along a first direction;

[0008] The main valve core assembly is disposed in the oil chamber. The main valve core assembly includes a main valve core that is slidably disposed in the oil chamber along the height direction of the valve body, and a first elastic member. The two ends of the first elastic member are elastically pressed against the main valve core and the valve seat, respectively.

[0009] An electromagnetic drive assembly, a second elastic element, and a pilot valve core assembly slidably disposed on the main valve core along the height direction of the valve body are disposed within the valve body. The two ends of the second elastic element elastically abut against the pilot valve core assembly and the electromagnetic drive assembly, respectively. The pilot valve core assembly and the main valve core form a closed cavity. The main valve core is provided with an oil inlet passage and an oil outlet passage. The oil inlet passage is connected to both the oil inlet and the closed cavity. The oil outlet passage is connected to the second oil outlet. The electromagnetic drive assembly can drive the pilot valve core assembly to slide along the first direction, so that the pilot valve core assembly disconnects the closed cavity and the oil outlet passage. The elastic restoring force of the second elastic element can drive the pilot valve core assembly to slide along the second direction and connect the closed cavity and the oil outlet passage.

[0010] The hydraulic oil in the enclosed cavity can drive the main valve core to slide along the second direction, so that the main valve core connects the oil inlet and the first oil outlet. The elastic restoring force of the first elastic element can drive the main valve core to slide along the first direction and connect the first oil outlet and the second oil outlet. The first direction and the second direction are opposite and both are parallel to the height direction of the valve body.

[0011] Preferably, the main valve core includes a first valve core section and a second valve core section connected to each other. The outer peripheral surface of the first valve core section is recessed with an annular groove. The oil inlet passage is distributed in the first valve core section, and the oil outlet passage is distributed in the second valve core section. The annular groove can connect the oil inlet and the first oil outlet, and can also connect the first oil outlet and the second oil outlet. The two ends of the first elastic member are respectively pressed against the first valve core section and the valve seat.

[0012] Preferably, the inner wall of the oil cavity is provided with a partition surface located between the oil inlet and the second oil outlet, the first oil outlet is distributed on the partition surface, and the outer peripheral surface of the first valve core segment or the outer peripheral surface of the second valve core segment can fit circumferentially with the partition surface.

[0013] Preferably, the pilot valve core assembly includes an inner valve core and a pilot valve core, the electromagnetic drive assembly includes an armature seat fixedly disposed on the valve body, and an electromagnetic assembly fixedly disposed on the armature seat, the inner valve core is slidably inserted into the armature seat, the pilot valve core is slidably sleeved on the armature seat and forms a flow channel with the armature seat, and the flow channel communicates with the closed cavity;

[0014] The electromagnetic component can drive the inner valve core and the pilot valve core to slide synchronously along the first direction, so as to disconnect the flow channel from the oil outlet channel; the two ends of the second elastic member are respectively pressed against the pilot valve core and the armature seat, and the elastic restoring force of the second elastic member can drive the pilot valve core to slide along the second direction and connect the flow channel and the oil outlet channel.

[0015] Preferably, the armature seat is provided with a through hole, which is connected to both the closed cavity and the flow channel.

[0016] Preferably, the pilot valve core is provided with a first conical guide surface, and the armature seat is provided with a second conical guide surface, wherein the first conical guide surface can slide and fit with the second conical guide surface;

[0017] Along the height direction of the valve body, the through hole is located between the second tapered guide surface and the closed cavity.

[0018] Preferably, the pilot valve core assembly further includes a pin, with one end of the inner valve core slidingly located between the electromagnetic component and the armature seat, and the other end connected to the pilot valve core via the pin.

[0019] Preferably, the pilot valve core is provided with a first pin hole, the armature seat is provided with a second pin hole, the inner valve core is provided with a third pin hole, and the pin is inserted into the first pin hole, the second pin hole and the third pin hole;

[0020] The diameter of the second pin hole is larger than the diameter of the pin rod.

[0021] Preferably, one of the valve body and the armature seat is provided with a first sealing ring, which is used to seal the gap between the valve body and the armature seat.

[0022] Preferably, the valve body is further provided with a leakage detection port, which communicates with the gap between the valve body and the armature seat.

[0023] The beneficial effects of this invention are:

[0024] The present invention aims to provide an electromagnetically driven control valve, which includes a valve body and a valve seat connected together, a main valve core assembly disposed in an oil chamber, an electromagnetic drive assembly disposed in the valve body, a second elastic element, and a pilot valve core assembly slidably disposed on the main valve core along the height direction of the valve body. When the electromagnetic drive assembly of the electromagnetically driven control valve is energized, the electromagnetic drive assembly drives the pilot valve core assembly to slide upward in a first direction, that is, to slide away from the valve seat, until the pilot valve core assembly disconnects the closed chamber and the oil outlet passage. During this process, the second elastic element is compressed, delivering hydraulic oil to the oil inlet. The hydraulic oil enters the oil chamber and the oil inlet passage simultaneously from the oil inlet. Since the oil inlet passage and the oil outlet passage are not connected at this time, the hydraulic oil flowing in from the oil inlet passage accumulates in the closed chamber, and the hydraulic oil in the closed chamber presses the main valve core. The main valve core slides along the second direction and approaches the valve seat, connecting the inlet and the first outlet. At this time, the hydraulic oil flowing in from the inlet passes through the oil chamber and flows out from the first outlet, achieving a large flow rate of oil delivery. During this process, the first elastic element is compressed. When the electromagnetic drive assembly of the electromagnetic drive control valve is de-energized, the elastic restoring force of the first elastic element drives the main valve core to move along the first direction. The main valve core connects the first outlet and the second outlet. The elastic restoring force of the second elastic element drives the pilot valve core assembly to slide along the second direction, connecting the closed chamber and the outlet oil passage, and delivering hydraulic oil to the inlet. The hydraulic oil enters the oil chamber and the inlet oil passage simultaneously from the inlet. The hydraulic oil entering the inlet oil passage flows through the closed chamber and the outlet oil passage in sequence, and finally flows out from the first outlet and the second outlet, thus achieving a small flow rate of oil delivery. Compared with existing technologies, this electromagnetic drive control valve achieves high-flow oil delivery while reducing the electromagnetic force required, improving its performance and reliability, and lowering its energy consumption. Furthermore, by integrating the electromagnetic drive assembly, main valve core assembly, and pilot valve core assembly into the oil cavity formed by the valve body and valve seat, the electromagnetic drive control valve boasts a compact structure, occupies less space, and further enhances its performance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the electromagnetic drive control valve provided in a specific embodiment of the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of the electromagnetic drive control valve provided in a specific embodiment of the present invention. Figure 2 ;

[0027] Figure 3 This is a partial structural diagram of the electromagnetic drive control valve provided in a specific embodiment of the present invention. Figure 1 ;

[0028] Figure 4This is a schematic diagram of the main valve core of the electromagnetic drive control valve provided in a specific embodiment of the present invention;

[0029] Figure 5 This is a partial structural diagram of the electromagnetic drive control valve provided in a specific embodiment of the present invention. Figure 2 ;

[0030] Figure 6 yes Figure 5 A partial view at point A.

[0031] In the picture:

[0032] 11. Valve body; 12. Valve seat; 111. Oil inlet; 112. First oil outlet; 113. Second oil outlet; 114. Oil chamber; 1141. Separating surface; 115. Leakage detection port; 116. First limiting surface; 121. Second limiting surface;

[0033] 2. Main valve core assembly; 21. Main valve core; 22. First elastic element; 211. First valve core section; 2111. Oil inlet passage; 2112. Annular groove; 212. Second valve core section; 2121. Oil outlet passage;

[0034] 3. Electromagnetic drive assembly; 31. Armature seat; 32. Electromagnetic assembly; 311. Through hole; 312. Second tapered guide surface; 313. Second pin hole;

[0035] 4. Second elastic element;

[0036] 5. Pilot valve core assembly; 51. Enclosed cavity; 52. Inner valve core; 53. Pilot valve core; 531. Flow channel; 532. First conical guide surface; 54. Pin;

[0037] 6. First sealing ring;

[0038] 7. Second sealing ring;

[0039] 8. Third sealing ring. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0041] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0044] This invention provides an electromagnetically driven control valve, such as... Figure 1-5As shown, the electromagnetically driven control valve includes a valve body 11 and a valve seat 12 connected together, a main valve core assembly 2 disposed in an oil chamber 114, an electromagnetic drive assembly 3 disposed in the valve body 11, a second elastic element 4, and a pilot valve core assembly 5 slidably disposed on the main valve core 21 along the height direction of the valve body 11. The valve body 11 and the valve seat 12 form the oil chamber 114. The valve body 11 is provided with an oil inlet 111, a first oil outlet 112, and a second oil outlet 113 connected to the oil chamber 114 in a first direction. The main valve core assembly 2 includes a main valve core 21 slidably disposed in the oil chamber 114 along the height direction of the valve body 11, and a first elastic element 22. The two ends of the first elastic element 22 elastically abut against the main valve core 21 and the valve seat 12, respectively. The two ends of the second elastic element 4 elastically abut against the pilot valve core assembly 5 and the electromagnetic drive assembly 3, respectively. The pilot valve core assembly 5 and the main valve core 21 form a closed cavity 51. The valve core 21 is provided with an oil inlet passage 2111 and an oil outlet passage 2121. The oil inlet passage 2111 is connected to both the oil inlet port 111 and the closed cavity 51. The oil outlet passage 2121 is connected to the second oil outlet port 113. The electromagnetic drive assembly 3 can drive the pilot valve core assembly 5 to slide along the first direction, so that the pilot valve core assembly 5 disconnects the closed cavity 51 and the oil outlet passage 2121. The elastic restoring force of the second elastic element 4 can drive the pilot valve core assembly 5 to slide along the second direction and connect the closed cavity 51 and the oil outlet passage 2121. The hydraulic oil in the closed cavity 51 can drive the main valve core 21 to slide along the second direction, so that the main valve core 21 connects the oil inlet port 111 and the first oil outlet port 112. The elastic restoring force of the first elastic element 22 can drive the main valve core 21 to slide along the first direction and connect the first oil outlet port 112 and the second oil outlet port 113. The first direction and the second direction are opposite and both are parallel to the height direction of the valve body 11.

[0045] like Figure 1-5As shown, in this electromagnetically driven control valve, when the electromagnetic drive assembly 3 is energized, the electromagnetic drive assembly 3 drives the pilot valve core assembly 5 to slide upward in the first direction, that is, to slide away from the valve seat 12, until the pilot valve core assembly 5 disconnects the closed cavity 51 and the oil outlet passage 2121. During this process, the second elastic element 4 is compressed, supplying hydraulic oil to the oil inlet 111. The hydraulic oil enters the oil chamber 114 and the oil inlet passage 2111 simultaneously from the oil inlet 111. Since the oil inlet passage 2111 and the oil outlet passage 2121 are not connected at this time, the hydraulic oil flowing in from the oil inlet passage 2111 accumulates in the closed cavity 51. The hydraulic oil in the closed cavity 51 presses the main valve core 21 to slide in the second direction and approach the valve seat 12, so that the main valve core 21 connects the oil inlet 111 and the first oil outlet 112. At this time, the hydraulic oil flowing in from the oil inlet 111 passes through... The oil flows through the oil chamber 114 and out through the first oil outlet 112, achieving a large flow rate of oil delivery. During this process, the first elastic element 22 is compressed. When the electromagnetic drive assembly 3 of the electromagnetic drive control valve is de-energized, the elastic restoring force of the first elastic element 22 drives the main valve core 21 to move along the first direction. The main valve core 21 connects the first oil outlet 112 and the second oil outlet 113. The elastic restoring force of the second elastic element 4 drives the pilot valve core assembly 5 to slide along the second direction, so that the pilot valve core assembly 5 connects the closed chamber 51 and the oil outlet passage 2121, delivering hydraulic oil to the oil inlet 111. The hydraulic oil enters the oil chamber 114 and the oil inlet passage 2111 simultaneously from the oil inlet 111. The hydraulic oil entering the oil inlet passage 2111 flows through the closed chamber 51 and the oil outlet passage 2121 in sequence, and finally flows out through the first oil outlet 112 and the second oil outlet 113 to achieve a small flow rate of oil delivery. Compared with existing technologies, this electromagnetic drive control valve achieves high-flow oil delivery while reducing the electromagnetic force required, improving its performance and reliability, and lowering its energy consumption. Furthermore, by integrating the electromagnetic drive assembly 3, the main valve core assembly 2, and the pilot valve core assembly 5 into the oil chamber 114 formed by the valve body 11 and the valve seat 12, the electromagnetic drive control valve has a compact structure, occupies less space, and further improves its performance.

[0046] in, Figure 1 This is a schematic diagram of the structure when the electromagnetic drive component 3 of the electromagnetic drive control valve is energized, and the oil inlet 111 and the first oil outlet 112 are connected. Figure 2 This is a schematic diagram of the structure when the electromagnetic drive component 3 of the electromagnetic drive control valve is de-energized, and the first oil outlet 112 and the second oil outlet 113 are connected.

[0047] in, Figure 1-3 and Figure 5 In the diagram, direction ba is the first direction; direction ab is the second direction. The first and second directions are opposite and both are parallel to the height direction of valve body 11.

[0048] Among them, such as Figure 1-4 As shown, the main valve core 21 includes a first valve core section 211 and a second valve core section 212 connected to each other. The outer peripheral surface of the first valve core section 211 is recessed with an annular groove 2112. The oil inlet passage 2111 is distributed in the first valve core section 211, and the oil outlet passage 2121 is distributed in the second valve core section 212. The annular groove 2112 can connect the oil inlet 111 and the first oil outlet 112, and can also connect the first oil outlet 112 and the second oil outlet 113. The two ends of the first elastic member 22 are respectively pressed against the first valve core section 211 and the valve seat 12. Specifically, when the electromagnetic drive assembly 3 of the electromagnetic drive control valve is energized, the pilot valve core assembly 5 disconnects the closed chamber 51 and the oil outlet passage 2121, supplying hydraulic oil to the oil inlet 111. The hydraulic oil simultaneously enters the oil chamber 114 and the oil inlet passage 2111 from the oil inlet 111. The hydraulic oil flowing in from the oil inlet passage 2111 accumulates in the closed chamber 51. The hydraulic oil in the closed chamber 51 presses the main valve core 21 to slide along the second direction and approach the valve seat 12, so that the annular groove 2112 connects the oil inlet 111 and the first oil outlet 112. The hydraulic oil flowing in from the oil inlet 111 passes through the oil chamber 114 and flows out from the first oil outlet 112, realizing a large flow rate. When the electromagnetic drive assembly 3 of the electromagnetic drive control valve is de-energized, the pilot valve core assembly 5 connects the closed cavity 51 and the oil outlet passage 2121. The elastic restoring force of the first elastic element 22 drives the main valve core 21 to move along the first direction, so that the annular groove 2112 connects the first oil outlet 112 and the second oil outlet 113, and delivers hydraulic oil to the oil inlet 111. The hydraulic oil enters the oil chamber 114 and the oil inlet passage 2111 simultaneously from the oil inlet 111. The hydraulic oil entering the oil inlet passage 2111 flows through the closed cavity 51 and the oil outlet passage 2121 in sequence, and finally flows out from the first oil outlet 112 and the second oil outlet 113 to achieve small flow rate oil delivery.

[0049] Specifically, such as Figure 1-4As shown, the inner wall of the oil chamber 114 has a protruding partition surface 1141 located between the oil inlet 111 and the second oil outlet 113. The first oil outlet 112 is distributed on the partition surface 1141. The outer peripheral surface of the first valve core section 211 or the outer peripheral surface of the second valve core section 212 can fit circumferentially with the partition surface 1141. Specifically, when the electromagnetic drive assembly 3 of the electromagnetic drive control valve is energized, the pilot valve core assembly 5 disconnects the closed chamber 51 and the oil outlet passage 2121, and delivers hydraulic oil to the oil inlet 111. The hydraulic oil enters the oil chamber 114 and the oil inlet passage 2111 simultaneously from the oil inlet 111. The hydraulic oil flowing in from the oil inlet passage 2111 accumulates in the closed chamber 51. The hydraulic oil in the closed chamber 51 presses the main valve core 21 to slide in the second direction and approach the valve seat 12, so that the first valve core 21 slides in the second direction and approaches the valve seat 12. The outer peripheral surface of the first valve core section 211 is separated from the partition surface 1141, and the outer peripheral surface of the second valve core section 212 is circumferentially attached to the partition surface 1141. At this time, the annular groove 2112 connects the oil inlet 111 and the first oil outlet 112, and the first oil outlet 112 and the second oil outlet 113 are in a disconnected state. The hydraulic oil flowing in from the oil inlet 111 passes through the oil chamber 114 and flows out from the first oil outlet 112, realizing a large flow rate of oil delivery; when the electromagnetic drive control When the electromagnetic drive assembly 3 of the valve is de-energized, the pilot valve core assembly 5 connects the closed cavity 51 and the oil outlet passage 2121. The elastic restoring force of the first elastic element 22 drives the main valve core 21 to move along the first direction, causing the outer peripheral surface of the first valve core segment 211 to re-fit with the separating surface 1141 circumferentially, and the outer peripheral surface of the second valve core segment 212 to separate from the separating surface 1141. At this time, the outer peripheral surface of the first valve core segment 211 and the separating surface 1141 cooperate to re-open the oil inlet 11 1. The first oil outlet 112 is disconnected, and the annular groove 2112 connects the first oil outlet 112 and the second oil outlet 113 to deliver hydraulic oil to the oil inlet 111. The hydraulic oil enters the oil chamber 114 and the oil inlet passage 2111 simultaneously from the oil inlet 111. The hydraulic oil entering the oil inlet passage 2111 flows through the closed chamber 51 and the oil outlet passage 2121 in sequence, and finally flows out from the first oil outlet 112 and the second oil outlet 113 to achieve small flow rate oil delivery.

[0050] Specifically, in this embodiment, such as Figure 4 As shown, the outer diameter of the first valve core section 211 and the outer diameter of the second valve core section 212 are equal, and both the outer diameter of the first valve core section 211 and the outer diameter of the second valve core section 212 are larger than the inner diameter of the annular groove 2112.

[0051] Specifically, such as Figure 1-3As shown, the valve body 11 is provided with a first limiting surface 116, and the main valve core 21 can abut against the first limiting surface 116 along a first direction; the valve seat 12 is also provided with a second limiting surface 121, and the main valve core 21 can abut against the second limiting surface 121 along a second direction. Specifically, when the main valve core 21 abuts against the first limiting surface 116 along the first direction, the annular groove 2112 connects the first oil outlet 112 and the second oil outlet 113; when the main valve core 21 abuts against the second limiting surface 121 along the second direction, the annular groove 2112 connects the oil inlet 111 and the first oil outlet 112. This arrangement can limit the sliding range of the main valve core 21 along the height direction of the valve body 11.

[0052] Among them, such as Figure 1-6As shown, the pilot valve core assembly 5 includes an inner valve core 52 and a pilot valve core 53. The electromagnetic drive assembly 3 includes an armature seat 31 fixedly disposed on the valve body 11 and an electromagnetic assembly 32 fixedly disposed on the armature seat 31. The inner valve core 52 is slidably inserted into the armature seat 31, and the pilot valve core 53 is slidably sleeved on the armature seat 31 and forms a flow channel 531 with the armature seat 31. The flow channel 531 is connected to the closed cavity 51. The electromagnetic assembly 32 can drive the inner valve core 52 and the pilot valve core 53 to slide synchronously along the first direction so that the flow channel 531 is disconnected from the oil outlet passage 2121. The two ends of the second elastic member 4 are respectively pressed against the pilot valve core 53 and the armature seat 31. The elastic restoring force of the second elastic member 4 can drive the pilot valve core 53 to slide along the second direction and connect the flow channel 531 with the oil outlet passage 2121. Specifically, when the electromagnetic component 32 is energized, it drives the inner valve core 52 and the pilot valve core 53 to slide upward synchronously in the first direction until the pilot valve core 53 disconnects the flow channel 531 and the oil outlet channel 2121, supplying hydraulic oil to the oil inlet 111. The hydraulic oil enters the oil chamber 114 and the oil inlet channel 2111 synchronously from the oil inlet 111. Since the flow channel 531 and the oil outlet channel 2121 are not connected at this time, the hydraulic oil flowing in from the oil inlet channel 2111 accumulates in the closed cavity 51. The hydraulic oil in the closed cavity 51 pressurizes the main valve. The valve core 21 slides in the second direction and approaches the valve seat 12, causing the outer peripheral surface of the first valve core segment 211 to separate from the separating surface 1141, and the outer peripheral surface of the second valve core segment 212 to circumferentially fit against the separating surface 1141. At this time, the annular groove 2112 connects the oil inlet 111 and the first oil outlet 112, and the first oil outlet 112 and the second oil outlet 113 are in a disconnected state, so that the hydraulic oil flowing in from the oil inlet 111 passes through the oil chamber 114 and flows out from the first oil outlet 112, realizing a large flow rate of oil delivery; when the electromagnetic drive control valve When the electromagnetic drive assembly 3 is de-energized, the elastic restoring force of the first elastic element 22 drives the main valve core 21 to move along the first direction. The outer peripheral surface of the first valve core segment 211 of the main valve core 21 re-fits with the separating surface 1141 circumferentially, and the outer peripheral surface of the second valve core segment 212 separates from the separating surface 1141. At this time, the outer peripheral surface of the first valve core segment 211 and the separating surface 1141 cooperate to re-disconnect the oil inlet 111 and the first oil outlet 112, and the annular groove 2112 connects the first oil outlet 112 and the second oil outlet 113. The elastic restoring force of 4 drives the pilot valve core 53 and the inner valve core 52 to slide synchronously along the second direction, so that the pilot valve core 53 connects the flow channel 531 and the oil outlet channel 2121, and delivers hydraulic oil to the oil inlet 111. The hydraulic oil enters the oil chamber 114 and the oil inlet channel 2111 synchronously from the oil inlet 111. The hydraulic oil entering the oil inlet channel 2111 flows through the closed chamber 51, the flow channel 531, the main valve core 21 and the oil outlet channel 2121 in sequence, and finally flows out from the first oil outlet 112 and the second oil outlet 113 to achieve small flow rate oil delivery.

[0053] Specifically, such as Figure 1-3 and Figure 6 As shown, the armature base 31 is provided with a through hole 311, which communicates with both the closed cavity 51 and the flow channel 531. This arrangement connects the closed cavity 51 and the flow channel 531, allowing hydraulic oil in the closed cavity 51 to flow sequentially through the through hole 311, the flow channel 531, the main valve core 21, and the oil outlet channel 2121, before exiting through the first oil outlet 112 and the second oil outlet 113. More specifically, there are multiple through holes 311, which are spaced apart circumferentially along the armature base 31.

[0054] Specifically, such as Figure 1-3 and Figure 6 As shown, the pilot valve core 53 is provided with a first conical guide surface 532, and the armature seat 31 is provided with a second conical guide surface 312. The first conical guide surface 532 can slide and fit with the second conical guide surface 312. Along the height direction of the valve body 11, the through hole 311 is located between the second conical guide surface 312 and the closed cavity 51. Specifically, when the electromagnetic component 32 is energized, it drives the inner valve core 52 and the pilot valve core 53 to slide synchronously along the first direction, causing the first conical guide surface 532 and the second conical guide surface 312 to circumferentially fit together. When the first conical guide surface 532 and the second conical guide surface 312 slide together, the hydraulic oil in the flow channel 531 cannot flow out to the main valve core 21. When the electromagnetic component 32 is de-energized, the elastic restoring force of the second elastic element 4 drives the pilot valve core 53 and the inner valve core 52 to slide synchronously along the second direction, causing the first conical guide surface 532 and the second conical guide surface 312 to separate and form the flow channel 531. The hydraulic oil entering the flow channel 531 flows sequentially through the main valve core 21 and the oil outlet channel 2121, and finally flows out from the first oil outlet 112 and the second oil outlet 113. Specifically, in this embodiment, the pilot valve core 53 is approximately funnel-shaped.

[0055] Specifically, such as Figure 1-3 and Figure 5 As shown, the pilot valve core assembly 5 also includes a pin 54. One end of the inner valve core 52 slides between the electromagnetic assembly 32 and the armature seat 31, and the other end is connected to the pilot valve core 53 via the pin 54. The inner valve core 52 and the pilot valve core 53 are connected by the pin 54. When the electromagnetic assembly 32 is energized, it drives the inner valve core 52 and the pilot valve core 53 to slide synchronously along the first direction. When the electromagnetic assembly 32 is de-energized, the elastic restoring force of the second elastic element 4 drives the inner valve core 52 and the pilot valve core 53 to slide synchronously along the second direction.

[0056] More specifically, such as Figure 1-3 and Figure 5As shown, the pilot valve core 53 has a first pin hole, the armature seat 31 has a second pin hole 313, the inner valve core 52 has a third pin hole, and the pin 54 is inserted into the first pin hole, the second pin hole 313, and the third pin hole; the diameter of the second pin hole 313 is larger than the diameter of the pin 54. This arrangement is to enable the inner valve core 52 and the pilot valve core 53 to slide synchronously; the diameter of the second pin hole 313 is set to be larger than the diameter of the pin 54, leaving room for the pin 54 to move along the height direction of the valve body 11, so as to ensure that when the electromagnetic component 32 is energized, the inner valve core 52 and the pilot valve core 53 slide synchronously along the first direction, and when the electromagnetic component 32 is de-energized, the elastic restoring force of the second elastic element 4 drives the inner valve core 52 and the pilot valve core 53 to slide synchronously along the second direction.

[0057] Among them, such as Figure 1-3 and Figure 5 As shown, one of the valve body 11 and the armature seat 31 is provided with a first sealing ring 6, which is used to seal the gap between the valve body 11 and the armature seat 31 to prevent hydraulic oil from leaking through the gap between the valve body 11 and the armature seat 31.

[0058] Specifically, such as Figure 1-3 As shown, the valve body 11 is also provided with a leakage detection port 115, which communicates with the gap between the valve body 11 and the armature seat 31. Whether the first sealing ring 6 can properly seal the gap between the valve body 11 and the armature seat 31 can be determined by whether there is oil leakage through the leakage detection port 115.

[0059] Among them, such as Figure 1-3 and Figure 5 As shown, one of the armature seat 31 and the inner valve core 52 is provided with a second sealing ring 7, which is used to seal the gap between the armature seat 31 and the inner valve core 52. This prevents hydraulic oil from leaking into the electromagnetic assembly 32 through the gap between the armature seat 31 and the inner valve core 52.

[0060] Among them, such as Figure 1-3 As shown, one of the valve body 11 and the valve seat 12 is provided with a third sealing ring 8, which is used to seal the gap between the valve body 11 and the valve seat 12. This prevents hydraulic oil from leaking through the gap between the valve body 11 and the valve seat 12.

[0061] The specific structure of the electromagnetic component 32 is existing technology and will not be described in detail here.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An electromagnetically driven control valve characterized by comprising: include: A valve body (11) and a valve seat (12) are connected to each other. The valve body (11) and the valve seat (12) form an oil chamber (114). The valve body (11) is provided with an oil inlet (111), a first oil outlet (112) and a second oil outlet (113) that communicate with the oil chamber (114) in sequence along a first direction. The main valve core assembly (2) is disposed in the oil cavity (114). The main valve core assembly (2) includes a main valve core (21) that is slidably disposed in the oil cavity (114) along the height direction of the valve body (11), and a first elastic member (22). The two ends of the first elastic member (22) are elastically pressed against the main valve core (21) and the valve seat (12) respectively. An electromagnetic drive assembly (3), a second elastic element (4), and a pilot valve core assembly (5) slidably disposed on the main valve core (21) along the height direction of the valve body (11) are provided in the valve body (11). The two ends of the second elastic element (4) elastically abut against the pilot valve core assembly (5) and the electromagnetic drive assembly (3) respectively. The pilot valve core assembly (5) and the main valve core (21) form a closed cavity (51). The main valve core (21) is provided with an oil inlet passage (2111) and an oil outlet passage (2121). The oil inlet passage (2111) 1) Both the oil inlet (111) and the closed cavity (51) are connected. The oil outlet passage (2121) is connected to the second oil outlet (113). The electromagnetic drive assembly (3) can drive the pilot valve core assembly (5) to slide along the first direction so that the pilot valve core assembly (5) disconnects the closed cavity (51) and the oil outlet passage (2121). The elastic restoring force of the second elastic element (4) can drive the pilot valve core assembly (5) to slide along the second direction and connect the closed cavity (51) and the oil outlet passage (2121). The hydraulic oil in the closed cavity (51) can drive the main valve core (21) to slide along the second direction, so that the main valve core (21) connects the oil inlet (111) and the first oil outlet (112). The elastic restoring force of the first elastic element (22) can drive the main valve core (21) to slide along the first direction and connect the first oil outlet (112) and the second oil outlet (113). The first direction and the second direction are opposite and both are parallel to the height direction of the valve body (11).

2. The electromagnetic drive control valve according to claim 1, characterized in that, The main valve core (21) includes a first valve core section (211) and a second valve core section (212) connected to each other. The outer peripheral surface of the first valve core section (211) is recessed with an annular groove (2112). The oil inlet passage (2111) is distributed in the first valve core section (211), and the oil outlet passage (2121) is distributed in the second valve core section (212). The annular groove (2112) can connect the oil inlet (111) and the first oil outlet (112), and can also connect the first oil outlet (112) and the second oil outlet (113). The two ends of the first elastic member (22) are respectively pressed against the first valve core section (211) and the valve seat (12).

3. The electromagnetic drive control valve according to claim 2, characterized in that, The inner wall of the oil cavity (114) is provided with a partition surface (1141) located between the oil inlet (111) and the second oil outlet (113). The first oil outlet (112) is distributed on the partition surface (1141). The outer peripheral surface of the first valve core section (211) or the outer peripheral surface of the second valve core section (212) can fit circumferentially with the partition surface (1141).

4. The electromagnetic drive control valve according to claim 1, characterized in that, The pilot valve core assembly (5) includes an inner valve core (52) and a pilot valve core (53). The electromagnetic drive assembly (3) includes an armature seat (31) fixedly disposed on the valve body (11) and an electromagnetic assembly (32) fixedly disposed on the armature seat (31). The inner valve core (52) is slidably inserted into the armature seat (31). The pilot valve core (53) is slidably sleeved on the armature seat (31) and forms a flow channel (531) with the armature seat (31). The flow channel (531) communicates with the closed cavity (51). The electromagnetic component (32) can drive the inner valve core (52) and the pilot valve core (53) to slide synchronously along the first direction, so that the flow channel (531) is disconnected from the oil outlet channel (2121); the two ends of the second elastic member (4) are respectively pressed against the pilot valve core (53) and the armature seat (31), and the elastic restoring force of the second elastic member (4) can drive the pilot valve core (53) to slide along the second direction and connect the flow channel (531) and the oil outlet channel (2121).

5. The electromagnetic drive control valve according to claim 4, characterized in that, The armature seat (31) is provided with a through hole (311), which is connected to both the closed cavity (51) and the flow channel (531).

6. The electromagnetic drive control valve according to claim 5, characterized in that, The pilot valve core (53) is provided with a first conical guide surface (532), and the armature seat (31) is provided with a second conical guide surface (312). The first conical guide surface (532) can slide and fit with the second conical guide surface (312). Along the height direction of the valve body (11), the through hole (311) is located between the second tapered guide surface (312) and the closed cavity (51).

7. The electromagnetic drive control valve according to claim 4, characterized in that, The pilot valve core assembly (5) also includes a pin (54). One end of the inner valve core (52) is slidably located between the electromagnetic assembly (32) and the armature seat (31), and the other end is connected to the pilot valve core (53) through the pin (54).

8. The electromagnetic drive control valve according to claim 7, characterized in that, The pilot valve core (53) is provided with a first pin hole, the armature seat (31) is provided with a second pin hole (313), the inner valve core (52) is provided with a third pin hole, and the pin (54) is inserted into the first pin hole, the second pin hole (313) and the third pin hole; The diameter of the second pin hole (313) is larger than the diameter of the pin (54).

9. The electromagnetic drive control valve according to any one of claims 4-8, characterized in that, One of the valve body (11) and the armature seat (31) is provided with a first sealing ring (6), which is used to seal the gap between the valve body (11) and the armature seat (31).

10. The electromagnetic drive control valve according to claim 9, characterized in that, The valve body (11) is also provided with a leakage detection port (115), which is connected to the gap between the valve body (11) and the armature seat (31).

Images