CN117628204A - Valve element assembly and valve device - Google Patents

Abstract

The utility model provides a case subassembly and valve device, including the main valve core subassembly, vice case subassembly and first sealing member, along the radial of case subassembly, the main valve core subassembly compresses tightly first sealing member with vice case subassembly, the main valve core subassembly includes the first part and the second part that the components of a whole that can function independently set up, the second part has the vice valve port, at least part wall in first groove is formed to first part and second part, at least part of first sealing member is located first groove, along the axial of case subassembly, the second part and the first step portion butt of first part, the second part contacts or the clearance setting with first sealing member, compare in pressing cover and little needle and compress tightly first sealing member along the axial of needle subassembly, first sealing member is located first groove, along the axial of case subassembly, the second part contacts or the clearance setting with first sealing member with first step portion, be favorable to reducing the risk that first sealing member drops, be favorable to improving the sealing effect.

Description

Valve element assembly and valve device

Technical Field

The application relates to the technical field of fluid control, in particular to a valve core assembly and a valve device.

Background

A needle subassembly for valve device includes big needle subassembly and little needle subassembly, and little needle subassembly includes little needle, sealing member and presses the cover, presses cover and little needle along the axial compaction sealing member of needle subassembly, the problem that the sealing member drops appears easily after long-time use.

Disclosure of Invention

An object of the present application is to provide a valve cartridge assembly and a valve device, which are advantageous for improving the sealing effect.

In order to achieve the above object, one embodiment of the present application adopts the following technical scheme:

a valve core assembly, which comprises a main valve core assembly, an auxiliary valve core assembly and a first sealing element, wherein the main valve core assembly and the auxiliary valve core assembly press the first sealing element along the radial direction of the valve core assembly, the main valve core assembly comprises a first part and a second part which are arranged in a split way, the second part is provided with an auxiliary valve port, the first part and the second part form at least part of the wall of a first groove, at least part of the first sealing element is positioned in the first groove, and the second part is contacted with or arranged in a clearance way with the first sealing element along the axial direction of the valve core assembly,

the first part comprises a first step part, and the second part is abutted with the first step part along the axial direction of the valve core assembly; and/or the second part comprises a second step part, and the first part is in abutting connection with the second step part along the axial direction of the valve core assembly.

A valve device comprising a valve core assembly, a driving part and a valve seat assembly, wherein the driving part can drive the valve core assembly to move along the axial direction of the valve device, the valve seat assembly is provided with a main valve port and a first through hole, at least part of the valve core assembly is positioned at the first through hole, the main valve core assembly can adjust the opening degree of the main valve port, the valve core assembly comprises a second sealing element, the second sealing element is arranged along the circumferential extension of the first part, the first part is tightly pressed with the valve seat assembly along the radial direction of the valve core assembly, the valve device is provided with a first channel, a second channel, a first cavity and a balancing channel, the containing cavity is positioned at different sides of the valve core assembly than the first channel, the second channel is positioned at the radial outer side of the valve core assembly, at least part of the balancing channel is formed at the valve core assembly, the balancing channel is communicated with the containing cavity, the balancing channel is communicated with the first channel, the valve device is opened and closed in a state,

When the valve device is in a valve closing state, the main valve opening is closed, the auxiliary valve opening is closed, and the first channel and the second channel are relatively not communicated; when the valve device is in a first valve opening state, the main valve opening is closed, the auxiliary valve opening is opened, and the first channel is communicated with the second channel; when the valve device is in a second valve opening state, the main valve opening is opened, the auxiliary valve opening is opened, and the first channel is communicated with the second channel.

The utility model provides an embodiment provides a case subassembly and valve device, including the main valve core subassembly, vice case subassembly and first sealing member, along the radial of case subassembly, the main valve core subassembly compresses tightly first sealing member with vice case subassembly, the main valve core subassembly includes the first part and the second part of components of a whole that can function independently setting, the second part has vice valve port, first part and second part form the at least partial wall in first groove, at least part of first sealing member is located first groove, along the axial of case subassembly, second part and first sealing member contact or clearance setting, second part and the first step butt of first part or the second step butt of first part, compare in pressure sleeve and little needle and compress tightly first sealing member along the axial of valve needle subassembly, first sealing member is located first groove, the second part and the first step butt of first part or the second step butt of first part and second part, the second part is with first sealing member contact or clearance setting, be favorable to reducing first sealing member's first sealing member risk, be favorable to improving sealing effect.

Drawings

FIG. 1 is a schematic cross-sectional view of a first embodiment of a valve cartridge assembly of the present application;

FIG. 2 is a schematic cross-sectional view of a second embodiment of the valve cartridge assembly of the present application;

FIG. 3 is a schematic view of a partial enlarged structure at A in FIG. 1;

FIG. 4 is a schematic view of a partially enlarged cross-sectional structure of a third embodiment of a valve cartridge assembly of the present application;

FIG. 5 is a schematic view of a partially enlarged cross-sectional structure of a fourth embodiment of a valve cartridge assembly of the present application;

FIG. 6 is a schematic cross-sectional view of one embodiment of a valve device of the present application;

FIG. 7 is a schematic cross-sectional view of the valve member of the valve apparatus of FIG. 6 in a closed valve condition;

FIG. 8 is a schematic cross-sectional view of the valve member of the valve apparatus of FIG. 6 in a first open valve state;

FIG. 9 is a schematic cross-sectional view of the valve member of the valve apparatus of FIG. 6 in a second open valve state;

FIG. 10 is a schematic cross-sectional view of a fifth embodiment of a valve cartridge assembly of the present application;

FIG. 11 is a schematic view of a partially enlarged structure at B in FIG. 10;

FIG. 12 is a schematic view of a partially enlarged cross-sectional structure of a sixth embodiment of a spool assembly of the present application;

FIG. 13 is a schematic view of a partially enlarged cross-sectional structure of a seventh embodiment of a spool assembly of the present application;

FIG. 14 is a schematic view of a partially enlarged cross-sectional structure of an eighth embodiment of a valve cartridge assembly of the present application;

fig. 15 is a partially enlarged cross-sectional schematic illustration of a ninth embodiment of the spool assembly of the present application.

Detailed Description

The invention is further described with reference to the accompanying drawings 1-15 and specific examples, in which numerous specific details are set forth in the following detailed description in order to provide a thorough understanding of the invention. Those skilled in the art will appreciate that the specific components, devices, and features illustrated in the accompanying drawings and described herein are merely exemplary and should not be considered limiting.

The valve device may be applied to a vehicle thermal management system including a new energy vehicle thermal management system in which the valve device is often employed as a throttle element or a switching element or an air conditioning system, and particularly to a circulation system in which CO2 is used as a refrigerant. Referring to fig. 6, the valve device 200 includes a driving part 1 and a valve part 3, the driving part 1 is located at the periphery of a part of the valve part 3, the driving part 1 is fixedly connected or in limited connection with the valve part 3, and further, a sealing arrangement can be performed between the driving part 1 and the valve part 3, so that moisture or other impurities in the external environment can be prevented from entering from an assembly gap between the driving part 1 and the valve part 3, and corrosion or failure inside the driving part 1 can be caused. The driving part 1 comprises an outer shell and a stator assembly 50, wherein the stator assembly 50 is positioned on the periphery of a part of the valve part 3, the driving part 1 is formed by insert injection molding at least by taking the stator assembly 50 as an insert injection molding part, and the outer shell is an injection molding part. The valve device 200 is electrically and/or signally connected to the outside via the drive member 1.

Referring to fig. 6, the valve member 3 includes a rotor assembly 51, a valve body assembly 100, a valve seat assembly 2, and a sleeve 52, the valve seat assembly 2 being located at the outer periphery of a portion of the valve body assembly 100, in particular, the valve seat assembly 2 having a first through hole 202, a portion of the valve body assembly 100 being located at the first through hole 202; the valve seat assembly 2 is provided with a main valve port 201, the valve core assembly 100 can adjust the opening of the main valve port 201, the sleeve 52 is sleeved on the periphery of the rotor assembly 51, the sleeve 52 is fixedly connected with the valve seat assembly 2, the rotor assembly 51 is fixedly connected or in limit connection with one end part of the valve core assembly 100, specifically, the valve core assembly 100 comprises a main valve core assembly 10, a secondary valve core assembly 20 and a screw rod assembly 22, the rotor assembly 51 is fixedly connected or in limit connection with one end part of the screw rod assembly 22, and the other end part of the screw rod assembly 22 is in transmission connection with the secondary valve core assembly 20; the valve device 200 has a first channel 2001 and a second channel 2002, when the rotor assembly 51 is driven by the magnetic field of the stator assembly 50 to rotate circumferentially, the rotor assembly 51 can drive the valve core assembly 100 to perform linear reciprocating motion along the axial direction of the valve device 200, the valve device 200 has a valve closing state, a first valve opening state and a second valve opening state, when the valve device 200 is in the valve closing state, referring to fig. 7, the main valve opening 201 is closed, the auxiliary valve opening 121 is closed, and the first channel 2001 is relatively not communicated with the second channel 2002; when the valve device 200 is in the first valve-opening state, referring to fig. 8, the main valve port 201 is closed, the sub-valve port 121 is opened, and the first passage 2001 communicates with the second passage 2002; referring to fig. 9, when the valve device 200 is in the second valve-opening state, the main valve port 201 is opened, the sub-valve port 121 is opened, and the first passage 2001 communicates with the second passage 2002. The axial direction of the valve device 200 is the N direction as shown in fig. 6. The term fixed connection includes both removable and non-removable connections.

Referring to fig. 1, a valve core assembly 100 includes a main valve core assembly 10, a sub valve core assembly 20 and a first sealing member 30, the main valve core assembly 10 and the sub valve core assembly 20 compress the first sealing member 30 along a radial direction of the valve core assembly 100, the main valve core assembly 10 includes a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 are separately provided, the first portion 11 is fixedly connected with the second portion 12, and specifically, the first portion 11 and the second portion 12 are fixedly welded; the second portion 12 has an auxiliary valve port 121, the first portion 11 and the second portion 12 form at least part of a wall of the first groove 13, at least part of the first seal member 30 is located in the first groove 13, along the axial direction of the valve element assembly 100, the second portion 12 is in contact with or clearance with the first seal member 30, the first portion 11 includes a first step portion 14, along the axial direction of the valve element assembly 100, the second portion 12 abuts against the first step portion 14, the first seal member 30 is located in the first groove 13, along the axial direction of the valve element assembly 100, the second portion 12 abuts against the first step portion 14 of the first portion 11, the first step portion 14 is used for limiting axial displacement of the second portion 12, and the second portion 12 is in contact with or clearance with the first seal member 30 along the axial direction of the valve element assembly 100, which is beneficial for reducing risk of the first seal member 30 falling off and improving the sealing effect. On the other hand, the first portion 11 is provided separately from the second portion 12, the first portion 11 and the second portion 12 forming at least part of the wall of the first groove 13, facilitating the loading of the first seal 30 into the first groove 13.

It can be appreciated that the radial direction of the valve core assembly 100 is perpendicular to the axial direction of the valve core assembly 100, the axial direction of the valve core assembly 100 is the axial direction of the valve device 200, and the axial direction of the valve core assembly 100 is the N direction as shown in fig. 1; referring to fig. 1, in the axial direction of the valve cartridge assembly 100, the first stepped portion 14 of the first portion 11 is located at one side of the second portion 12, and the first stepped portion 14 forms part of the wall of the first groove 13; the first step portion 14 may be located other than on the side of the second portion 12, and the wall forming the first recess 13 does not include the first step portion 14, for example, referring to fig. 4, the first step portion 14 is disposed near the sub-valve port 121, and the first step portion 14 is located radially outside the sub-valve port 121. The second portion 12 may also include a second stepped portion 15, referring to fig. 2, in the axial direction of the valve element assembly 100, the second stepped portion 15 abuts against the first portion 11, and the second stepped portion 15 forms part of the wall of the first groove 13; the wall forming the first groove 13 may not include the second stepped portion 15, for example, referring to fig. 4, the second portion 12 may include a first stopper 123, the first stopper 123 may be disposed near the sub-valve port 121 in the axial direction of the valve element assembly 100, the first stopper 123 may be disposed radially outward of the sub-valve port 121, the first stopper 123 may serve as the second stepped portion 15 of the second portion 12, and the second stepped portion 15 may abut against the first portion 11 in the axial direction of the valve element assembly 100. When the second portion 12 is provided with the second step portion 15, the first portion 11 may not be provided with the first step portion 14 or the first step portion 14 may be provided with a gap from the second portion 12. When the first stepped portion 14 is provided in the first portion 11, the second stepped portion 15 may not be provided in the second portion 12, and for example, referring to fig. 15, the first portion 11 includes the first stepped portion 14, the first stepped portion 14 abuts against the second portion 12 in the axial direction of the valve element assembly 100, the second portion 12 does not provide the second stepped portion 15,123, and the first portion 11 and the second portion 12 are welded and fixed in the radial direction of the valve element assembly 100.

In some embodiments, referring to fig. 1 and 3, the valve core assembly 100 includes a main valve core assembly 10 and a sub-valve core assembly 20, the main valve core assembly 10 includes a first portion 11 and a second portion 12 that are separately disposed, the first portion 11 forms a first top wall 131 and a first side wall 132 of the first groove 13, the second portion 12 forms a first bottom wall 133 of the first groove 13, the first side wall 132 compresses the first seal 30 with the sub-valve core assembly 20 along a radial direction of the valve core assembly 100, the first top wall 131 and the first bottom wall 133 can limit axial movement of the first seal 30 along the valve core assembly 100, the first top wall 131 contacts or is disposed in a gap with the first seal 30, the first bottom wall 133 contacts or is disposed in a gap with the first seal 30, which is beneficial for reducing an axial force to which the first seal 30 is subjected, beneficial for reducing a risk of the first seal 30 falling off, and improving a sealing effect compared to pressing sleeve and small valve needle compressing the first seal 30 along an axial direction of the valve core assembly.

Referring to fig. 3, the first portion 11 of the main spool assembly 10 includes a first stepped portion 14, the first stepped portion 14 forming a first sidewall 132 of the first groove 13, the first stepped portion 14 including a stepped surface 141, the stepped surface 141 abutting the second portion 12 in the axial direction of the spool assembly 100, the stepped surface 141 being configured to limit axial movement of the second portion 12 in the spool assembly 100 to facilitate control of the second portion 12 in contact with the first seal 30 or control of the amount of clearance between the second portion 12 and the first seal 30.

Referring to fig. 3, in the axial direction of the valve body assembly 100, the second portion 12 is located at one side of the first sealing member 30, the first portion 11 is fixedly connected to the second portion 12, the second portion 12 has a first guide hole 122 and a secondary valve port 121, the first guide hole 122 is closer to the first sealing member 30 than the secondary valve port 121, the secondary valve body assembly 20 is engaged with the first guide hole 122, and the secondary valve body assembly 20 can adjust the opening degree of the secondary valve port 121.

Referring to fig. 3, the second portion 12 includes a first limiting portion 123, along an axial direction of the valve core assembly 100, where the first limiting portion 123 abuts against the first portion 11, and the first limiting portion 123 can limit axial displacement of the second portion 12 relative to the first portion 11, so as to control a position of the auxiliary valve port 121, which is beneficial to improving accuracy of adjusting an opening of the auxiliary valve port 121 by the auxiliary valve core assembly 20; the first limiting part 123 is welded and fixed with the first part 11, specifically, the first limiting part 123 is welded and fixed with the first part 11 in a sealing connection manner, so that working medium flowing between the first limiting part 123 and the first part 11 is reduced or avoided; the main valve core assembly 10 is provided with a notch 101, the notch 101 is located on the radial outer side of the first limiting portion 123, and welding between the first limiting portion 123 and the first portion 11 is facilitated by the notch 101. It will be appreciated that when the first limiting portion 123 abuts the first portion 11 in the axial direction of the valve core assembly 100, the second portion 12 may be disposed in clearance with the first stepped portion 14 of the first portion 11 in the axial direction of the valve core assembly 100. It will be appreciated that, referring to fig. 15, the second portion 12 may not be provided with the second step 15,123, and the first portion 11 and the second portion 12 may be welded and fixed along the radial direction of the valve core assembly 100, specifically, the welded and fixed between the first portion 11 and the second portion 12 is a sealed connection, so as to reduce or avoid the working medium flowing between the first portion 11 and the second portion 12.

Referring to fig. 3, the second portion 12 has a second groove 124, the second groove 124 being disposed along a circumferential extension of the second portion 12, in particular, the second groove 124 being an annular groove; the second groove 124 opens toward the first portion 11, the wall forming the second groove 124 has a second communication port 125, the second communication port 125 is capable of communicating with the sub-valve port 121, the first portion 11 has a first communication port 111, and the first communication port 111 communicates with the second groove 124; when the first portion 11 and the second portion 12 are assembled, the second communication port 125 needs to be aligned with the first communication port 111, if the second communication port 125 is not aligned with the first communication port 111 or is not fully aligned with the first communication port 111, the flow of the working medium is easily affected, the performance of the valve device 200 is affected, and by providing the second groove 124, when the first portion 11 and the second portion 12 are assembled, the working medium can smoothly flow through the second communication port 125, the second groove 124 and the first communication port 111 even if the second communication port 125 is not aligned with the first communication port 111 or is not fully aligned with the first communication port 12, which is beneficial to ensuring the working performance of the valve device 200.

It will be appreciated that referring to fig. 4, the first portion 11 may also have a first groove 112, the first groove 112 extending in the circumferential direction of the first portion 11, the first groove 112 opening toward the second portion 12, the wall forming the first groove 112 having a third communication port 113, the first portion 11 having a first communication port 111, the first communication port 111 communicating with the third communication port 113, the second portion 12 having a second communication port 125, the second communication port 125 being capable of communicating with the auxiliary valve port 121, the second communication port 125 communicating with the first groove 112, the working medium being capable of smoothly flowing even if the second communication port 125 is not aligned with the first communication port 111 or is not fully aligned when the first portion 11 and the second portion 12 are assembled; when the first portion 11 is provided with the first groove 112, the second portion 12 may not be provided with the second groove 124.

Referring to fig. 5, the valve core assembly 100 includes a main valve core assembly 10 and a secondary valve core assembly 20, the main valve core assembly 10 includes a first portion 11 and a second portion 12 which are separately disposed, the first portion 11 and the second portion 12 form at least part of a wall of the first groove 13, the first portion 11 and the secondary valve core assembly 20 compress the first seal 30 along a radial direction of the valve core assembly 100, the first portion 11 and the second portion 12 can limit axial movement of the first seal 30 along the valve core assembly 100, compared with compressing the first seal 30 along an axial direction of the valve needle assembly by a pressure sleeve and a small valve needle, the second portion 12 abuts against the first step 14 of the first portion 11 along the axial direction of the valve core assembly 100, and the second portion 12 contacts with the first seal 30 or is disposed in a gap, so that axial force applied to the first seal 30 is reduced, risk of the first seal 30 falling off is facilitated, and sealing effect is improved. The second portion 12 has a sub-valve port 121 and a first communication port 111, the sub-valve element assembly 20 is capable of adjusting the opening degree of the sub-valve port 121, and the first communication port 111 is capable of communicating with the sub-valve port 121.

Referring to fig. 3, the valve core assembly 100 includes a first portion 11, a second portion 12 and a second sealing element 40, the second sealing element 40 extends along the circumferential direction of the first portion 11, the first portion 11 has a containing cavity 115 and a second guiding hole 114, the second guiding hole 114 is closer to the second portion 12 than the containing cavity 115, the auxiliary valve core assembly 20 includes an auxiliary valve core 21 and a screw rod assembly 22, the auxiliary valve core 21 includes a large diameter section 23 and a small diameter section 24, the small diameter section 24 is closer to the auxiliary valve port 121 than the large diameter section 23, at least part of the large diameter section 23 is located in the containing cavity 115, the large diameter section 23 is in transmission connection with the screw rod assembly 22, the screw rod assembly 22 can drive the auxiliary valve core assembly 20 to move along the axial direction of the valve core assembly 100, the small diameter section 24 is matched with the second guiding hole 122, the first sealing element 30 extends along the circumferential direction of the small diameter section 24, the first sealing element 30 is pressed against the first sealing element 30 along the radial direction of the valve core assembly 100, compared with the first sealing element 30 arranged on the large diameter section 23, the first sealing element 30 extends along the circumferential direction of the small diameter section 24, at least part of the small diameter section 24 is located on the auxiliary valve core section 23, at least part of the large diameter section 23 is in the axial direction, the large diameter section 23 is in the transmission connection with the large diameter section 23, the transmission connection with the screw rod assembly 22, the screw rod assembly can drive the auxiliary valve core assembly 20 to move smoothly, the valve core assembly 200 can work smoothly, and the working medium can be smoothly and axially and have a small working medium can be smoothly and have a small working medium effect on the valve core assembly 200.

It will be appreciated that the large diameter section 23 and the small diameter section 24 may be cylindrical, prismatic, conical, etc., and that when the large diameter section 23 and the small diameter section 24 are cylindrical, the diameter of the large diameter section 23 is greater than the diameter of the small diameter section 24.

Referring to fig. 3, the valve cartridge assembly 100 includes the first elastic member 16, at least a portion of the first elastic member 16 is located in the accommodating chamber 115, the sub-valve cartridge assembly 20 includes the large diameter section 23 and the small diameter section 24, the large diameter section 23 includes the first abutting portion 231, the wall forming the accommodating chamber 115 includes the second bottom wall 116, the first elastic member 16 is located between the first abutting portion 231 and the second bottom wall 116 in the axial direction of the valve cartridge assembly 100, the first elastic member 16 is in a compressed state, the main valve cartridge assembly 10 includes the first connecting member 17, the first connecting member 17 is fixedly connected with the first portion 11 in the axial direction of the valve cartridge assembly 100, the first abutting portion 231 is located between the first connecting member 17 and the first elastic member 16, the first connecting member 17 is used to restrict the axial movement of the first abutting portion 231 in the axial direction of the valve cartridge assembly 100, thereby restricting the axial movement of the sub-valve cartridge assembly 20 relative to the sub-valve port 121, and the sub-valve port 121 is in an open state when the first connecting member 17 abuts the first abutting portion 231.

Referring to fig. 6, the valve device 200 includes a valve cartridge assembly 100, a driving part 1 and a valve seat assembly 2, the driving part 1 is capable of driving the valve cartridge assembly 100 to move in an axial direction of the valve device 200, the valve seat assembly 2 has a main valve port 201 and a first through hole 202, at least part of the valve cartridge assembly 100 is located at the first through hole 202, the valve cartridge assembly 100 is capable of adjusting an opening degree of the main valve port 201, the valve cartridge assembly 100 and the valve seat assembly 2 compress the second seal 40 of the valve cartridge assembly 100 in a radial direction of the valve cartridge assembly 100, the valve device 200 has a first channel 2001, a second channel 2002, a first cavity 203 and a balance channel 204, the first cavity 203 is located at different sides of the valve cartridge assembly 100 than the first channel 2001 in an axial direction of the valve device 200, the second channel 2002 is located radially outside of the valve cartridge assembly 100, at least part of the balance channel 204 is formed in the valve core assembly 100, the balance channel 204 is communicated with the first cavity 203, the balance channel 204 is communicated with the first channel 2001, the first sealing element 30 and the second sealing element 40 can both play a role of preventing the working medium of the second channel 2002 from flowing into the first cavity 203, the valve device 200 has a valve closing state, a first valve opening state and a second valve opening state, when the valve device 200 is in the valve closing state, referring to fig. 7, the main valve opening 201 is closed, the auxiliary valve opening 121 is closed, the first channel 2001 is relatively not communicated with the second channel 2002, the working medium of the first channel 2001 can flow into the balance channel 204 and then flow into the first cavity 203, so that the pressure difference at the two axial ends of the valve core assembly 100 can be reduced or eliminated, and the stable operation of the valve core assembly 100 can be facilitated; when the valve device 200 is in the first valve opening state, referring to fig. 8, the main valve opening 201 is closed, the auxiliary valve opening 121 is opened, the first channel 2001 is communicated with the second channel 2002, the auxiliary valve core assembly 20 can move along the axial direction of the valve core assembly 100 relative to the auxiliary valve opening 121 to adjust the opening degree of the auxiliary valve opening 121, so as to realize flow adjustment of working medium, and the caliber of the auxiliary valve opening 121 is smaller than that of the main valve opening 201, thereby being beneficial to realizing adjustment of smaller flow and improving the accuracy of flow adjustment; when the valve device 200 is in the second valve opening state, referring to fig. 9, the main valve opening 201 is opened, the auxiliary valve opening 121 is opened, the first channel 2001 is communicated with the second channel 2002, and the caliber of the main valve opening 201 is larger than that of the auxiliary valve opening 121, so that the flow rate of the working medium is increased.

It can be understood that the opening of the valve port includes 0-100, when the valve port is closed, the opening of the valve port is 0, when the valve port is fully opened, the opening of the valve port is 100, the valve core assembly 100 can adjust the opening of the main valve port 201, and the opening adjusting range is 0-100; the sub valve element assembly 20 can adjust the opening degree of the sub valve port 121, and the opening degree adjustment range thereof is 0-100. Referring to FIG. 7, the first portion 11 of the main valve spool assembly 10 is capable of regulating the opening of the main valve port 201; in another embodiment, second portion 12 of main poppet assembly 10 is used to regulate the opening of main valve port 201.

Referring to fig. 3 and 6, the screw rod assembly 22 can drive the auxiliary valve core assembly 20 to move along the axial direction of the valve device 200, when the screw rod assembly 22 drives the auxiliary valve core assembly 20 to move away from the auxiliary valve port 121 along the axial direction of the valve device 200, the elastic force of the first elastic member 16 is greater than the friction force of the first sealing member 30 and the second sealing member 40, the main valve core assembly 10 is static relative to the main valve port 201, and the main valve port 201 is kept in a closed state; after the first abutting portion 231 abuts against the first connector 17, referring to fig. 3, 6, and 7, the sub-valve element assembly 20 is stationary with respect to the sub-valve port 121, and the sub-valve port 121 is fully opened; the screw rod assembly 22 continues to drive the auxiliary valve core assembly 20 to move away from the main valve port 201, and the auxiliary valve core assembly 20 can drive the main valve core assembly 10 to move away from the main valve port 201, so that the main valve port 201 is opened, and referring to fig. 9, the main valve port 201 is completely opened; the caliber of the main valve port 201 is larger than that of the auxiliary valve port 121, so that the flow rate of the working medium is increased. When the valve is closed, the screw rod 22 drives the auxiliary valve core assembly 20 to move towards the main valve port 201 along the axial direction of the valve core assembly 100, the first abutting part 231 keeps in contact with the first connecting piece 17 because the sum of the elastic force of the first elastic piece 16 and the friction force of the first sealing piece 30 is larger than the friction force of the second sealing piece 40, the auxiliary valve core assembly 20 keeps static relative to the main valve core assembly 10, the auxiliary valve core assembly 20 moves towards the main valve port 201 together with the main valve core assembly 10 until the main valve core assembly 10 closes the main valve port 201, and the main valve core assembly 10 stops moving; the screw 22 continues to drive the auxiliary valve core assembly 20 to move towards the main valve port 201, and the auxiliary valve core assembly 20 overcomes the elastic force of the first elastic piece 16 and the friction force of the first sealing piece 30 until the auxiliary valve core assembly 20 closes the auxiliary valve port 121.

Referring to fig. 10, the valve core assembly 100 includes a main valve core assembly 10, an auxiliary valve core assembly 20 and a screw rod assembly 22, the main valve core assembly 10 has an auxiliary valve port 121, the auxiliary valve core assembly 20 includes an auxiliary valve core 21, the auxiliary valve core 21 includes a large diameter section 23 and a small diameter section 24, the small diameter section 23 is closer to the auxiliary valve port 121 than the large diameter section 24, the large diameter section 23 is in transmission connection with the screw rod assembly 22, the small diameter section 24 of the auxiliary valve core assembly 20 can adjust the opening degree of the auxiliary valve port 121, the small diameter section 24 has a first opening 241, a first pore canal 242 and a second opening 243, along the axial direction of the valve core assembly 100, the first opening 241 is located at one end of the small diameter section 24, the first opening 241 is communicated with the first pore canal 242, the small diameter section 24 includes a second side wall 244, the second opening 243 is located at the second side wall 244, the second opening 243 is communicated with the first pore canal 242, the valve core assembly 100 has a first gap channel 102, the first gap channel 102 is located between the large diameter section 23 and the main valve core assembly 10, the second opening 243 is communicated with the first gap channel 102, the first opening 241, the first opening 243 and the second opening 243 and the first opening channel 242 are in the axial direction of the valve core assembly is at least partially balanced by the axial direction of the valve core assembly 100, the axial direction is beneficial to the balance of the valve core assembly 100, or the axial direction is at least the two end of the valve core assembly is balanced and the valve core assembly is at least partially balanced, and the axial flow and the valve core assembly is beneficial to the balanced.

It is understood that the second opening 243 may be provided as a circular, rectangular, waist-shaped opening, etc.; the second openings 243 are communicated with the first duct 242, and the number of the second openings 243 can be two or more, and the second openings 243 are distributed at equal intervals along the circumference of the small-diameter section 24, so that radial impact on the auxiliary valve core assembly 20 when high-pressure working medium flows into the first duct 242 is balanced, and stable operation of the valve core assembly 33 is facilitated.

In some embodiments, referring to fig. 10, main spool assembly 100 has a receiving chamber 115, at least a portion of large diameter section 23 is located in receiving chamber 115, the wall forming receiving chamber 115 includes a second bottom wall 116, and at least a portion of second opening 243 is located between second bottom wall 116 and large diameter section 23 in the axial direction of spool assembly 100, facilitating the flow of working medium located in first orifice 242 from second opening 243 into first clearance passage 102, facilitating the smooth flow of working medium in balance passage 204. It is understood that the number of the second openings 243 may be two or more, and the second openings 243 are distributed along the circumference of the minor diameter 24

Referring to fig. 10, the valve core assembly 100 includes a first elastic member 16, at least a portion of the first elastic member 16 is located in the accommodating chamber 115, the large-diameter section 23 includes a first abutment 231, the first elastic member 16 is located between the first abutment 231 and the second bottom wall 116 along the axial direction of the valve core assembly 100, the first elastic member 16 is in a compressed state, the main valve core assembly 10 includes a main valve core 103 and a first connecting member 17, the main valve core 103 is fixedly connected with the first connecting member 17, the first abutment 231 is located between the first connecting member 17 and the first elastic member 16 along the axial direction of the valve core assembly 100, the first connecting member 17 is used for limiting the axial movement of the first abutment 231 along the valve core assembly 100, thereby limiting the axial movement of the sub valve core assembly 20 relative to the sub valve port 121, and when the first connecting member 17 abuts against the first abutment 231, the sub valve port 121 is in an open state.

Referring to fig. 11, the spool assembly 100 has a first clearance passage 102, the first clearance passage 102 is located between the large diameter section 23 and the main spool assembly 10, the first clearance passage 102 has a first sub-passage 104 and a second sub-passage 105, the first sub-passage 104 is located between the second bottom wall 116 and the large diameter section 23 in the axial direction of the spool assembly 100, the first sub-passage 104 communicates with the second opening 243, the wall forming the receiving chamber 115 includes a third side wall 117, the second sub-passage 105 is located between the third side wall 117 and the large diameter section 23 in the radial direction of the spool assembly 100, the second sub-passage 105 communicates with the first sub-passage 104, at least part of the first elastic member 16 is located in the second sub-passage 105, the first abutment 231 is disposed in clearance with the third side wall 117, the first abutment 231 forms part of the wall of the second sub-passage 105, the first connecting member 17 is disposed in clearance with the sub-spool assembly 20, and the first connecting member 17 forms part of the wall of the second sub-passage 105.

Referring to fig. 12, the first abutting portion 231 may have a first communication hole 232, the first communication hole 232 communicating with the second sub-passage 105; when the first abutting portion 231 has the first communication hole 232, the first abutting portion 231 may be disposed in contact with the third sidewall 117. The first coupling member 17 may have a second communication hole 171, the second communication hole 171 communicating with the second sub-passage 105, and the first coupling member 17 may be slidably engaged with the sub-spool assembly 20 when the first coupling member 17 has the second communication hole 171.

Referring to fig. 11, the spool assembly 100 includes a first seal 30 and a second seal 40, the small diameter section 24 compresses the first seal 30 with the main spool assembly 10 in a radial direction of the spool assembly 100, the main spool assembly 10 has a guide hole 106, the guide hole 106 cooperates with the small diameter section 24, and the second seal 40 extends in a circumferential direction of the main spool assembly 10. Referring to fig. 12, the large diameter section 23 has a second hole 233, the second hole 233 is communicated with the first hole 242, the screw rod assembly 22 is partially located in the second hole 233, a second gap channel 221 is provided between the screw rod assembly 22 and the large diameter section 23, the second gap channel 221 is communicated with the second hole 233, the second hole 233 and the second gap channel 221 form a part of the balance channel 204, which is beneficial to increasing the flow area of the balance channel 204, and smooth flow of working medium in the balance channel 204, and the working medium can flow through at least the balance channel 204 at the two axial ends of the valve core assembly 100, which is beneficial to reducing or eliminating the pressure difference at the two axial ends of the valve core assembly 100, and is beneficial to smooth operation of the valve core assembly 100.

Referring to fig. 12, the valve core assembly 100 includes a second elastic member 18, at least a portion of the second elastic member 18 is located in the second hole 233, and along the axial direction of the valve core assembly 100, the screw rod assembly 22 and the auxiliary valve core assembly 20 squeeze the second elastic member 18, the second elastic member 18 is in a compressed state, and in a state in which the auxiliary valve core assembly 20 closes the auxiliary valve port 121, the second elastic member 18 can apply a force to the auxiliary valve core assembly 20 toward the auxiliary valve port 121, so as to facilitate improvement of the sealing effect; the large diameter section 23 includes a fourth side wall 234, the fourth side wall 234 having a third opening 235, the third opening 235 being in communication with the second port 233, at least a portion of the third opening 235 being located on one side of the first coupling 17 in the axial direction of the spool assembly 100. By providing the third opening 235 in the fourth sidewall 234, the flow area of the balance channel 204 is increased, smooth flow of the working medium in the balance channel 204 is facilitated, and the pressure difference between two axial ends of the valve core assembly 100 is reduced or eliminated.

Referring to fig. 13, first portion 11 and second portion 12 of main valve core assembly 10 are of unitary construction. Referring to fig. 14, the first portion 11 and the second portion 12 of the main valve core assembly 10 are integrally formed, the auxiliary valve core assembly 20 includes a large diameter section 23 and a small diameter section 24, the first sealing member 30 is disposed along the circumferential extension of the large diameter section 23, the main valve core assembly 10 and the large diameter section 23 compress the first sealing member 30 along the radial direction of the valve core assembly 100, the second portion 12 of the main valve core assembly 10 forms an auxiliary valve port 121, and the auxiliary valve core assembly 20 and the second portion 12 compress the first elastic member 16 along the axial direction of the valve core assembly 100.

It should be noted that: the above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified or substituted by the same, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention are intended to be included in the scope of the claims of the present invention.

Claims (19)

1. A valve core assembly, which comprises a main valve core assembly, an auxiliary valve core assembly and a first sealing element, wherein the main valve core assembly and the auxiliary valve core assembly press the first sealing element along the radial direction of the valve core assembly, the main valve core assembly comprises a first part and a second part which are arranged in a split way, the second part is provided with an auxiliary valve port, the first part and the second part form at least part of the wall of a first groove, at least part of the first sealing element is positioned in the first groove, and the second part is contacted with or arranged in a clearance way with the first sealing element along the axial direction of the valve core assembly,

The first part comprises a first step part, and the second part is abutted with the first step part along the axial direction of the valve core assembly; and/or the second part comprises a second step part, and the first part is in abutting connection with the second step part along the axial direction of the valve core assembly.

2. The valve cartridge assembly of claim 1, wherein: the first portion forms a first top wall and a first side wall of the first groove, the second portion forms a first bottom wall of the first groove, and the first side wall and the auxiliary valve core assembly compress the first sealing element along the radial direction of the valve core assembly.

3. The valve cartridge assembly of claim 2, wherein: the first stepped portion forms a first side wall of the first groove, the first stepped portion comprises a stepped surface, and the stepped surface is abutted with the second portion along the axial direction of the valve core assembly.

4. The valve cartridge assembly of claim 3, wherein: along the axial of case subassembly, the second part is located one side of first sealing member, first part with second part fixed connection, the second part has first guiding hole, first guiding hole is than the auxiliary valve port is close to first sealing member, the auxiliary valve core subassembly with first guiding hole cooperation, the auxiliary valve core subassembly can be adjusted the aperture of auxiliary valve port.

5. The valve cartridge assembly of claim 4, wherein: the second part comprises a first limiting part, the first limiting part is abutted with the first part along the axial direction of the valve core assembly, the first limiting part is fixedly welded with the first part, the main valve core assembly is provided with a notch, and the notch is positioned on the radial outer side of the first limiting part; alternatively, the first portion and the second portion are welded and fixed in a radial direction of the valve element assembly.

6. The valve cartridge assembly of claim 5, wherein: the second part is provided with a second groove, the second groove extends along the circumferential direction of the second part, the opening of the second groove faces the first part, the wall forming the second groove is provided with a second communication port, the second communication port can be communicated with the auxiliary valve port, the first part is provided with a first communication port, and the first communication port is communicated with the second groove;

and/or, the first part is provided with a first groove, the first groove extends along the circumference of the first part, the opening of the first groove faces the second part, the wall forming the first groove is provided with a third communication port, the second part is provided with a second communication port, the second communication port can be communicated with the auxiliary valve port, and the second communication port is communicated with the first groove.

7. The valve cartridge assembly of claim 6, wherein: the valve core assembly comprises a second sealing element, the second sealing element extends along the circumference of the first part, the first part is provided with a containing cavity and a second guide hole, the second guide hole is closer to the second part than the containing cavity, the auxiliary valve core assembly comprises an auxiliary valve core and a screw rod assembly, the auxiliary valve core comprises a large-diameter section and a small-diameter section, the small-diameter section is closer to the auxiliary valve port than the large-diameter section, at least part of the large-diameter section is located in the containing cavity, the large-diameter section is in transmission connection with the screw rod assembly, and the small-diameter section is matched with the second guide hole.

8. The valve cartridge assembly of claim 7, wherein: the valve core assembly comprises a first elastic piece, at least part of the first elastic piece is located in the accommodating cavity, the large-diameter section comprises a first abutting portion, the wall forming the accommodating cavity comprises a second bottom wall, the first elastic piece is located between the first abutting portion and the second bottom wall along the axial direction of the valve core assembly, the first elastic piece is in a compressed state, the main valve core assembly comprises a first connecting piece, the first connecting piece is fixedly connected with the first part, the first abutting portion is located between the first connecting piece and the first elastic piece along the axial direction of the valve core assembly.

9. A valve device comprising a valve cartridge assembly according to any one of claims 1-8, said valve device comprising a drive member and a valve seat assembly, said drive member being capable of moving said valve cartridge assembly in an axial direction of said valve device, said valve seat assembly having a main valve port and a first through hole, at least a portion of said valve cartridge assembly being located at said first through hole, said valve cartridge assembly being capable of adjusting an opening degree of said main valve port, said valve cartridge assembly being in radial direction of said valve cartridge assembly, said valve cartridge assembly compressing with said valve seat assembly a second seal of said valve cartridge assembly, said valve device having a first passage, a second passage, a first chamber and a balance passage, said first chamber being located on different sides of said valve cartridge assembly than said first passage, said second passage being located radially outward of said valve cartridge assembly, at least a portion of said balance passage being formed in said valve cartridge assembly, said balance passage being in communication with said first chamber, said first passage being in communication with said valve opening state, said valve opening state and said valve opening state,

When the valve device is in a valve closing state, the main valve opening is closed, the auxiliary valve opening is closed, and the first channel and the second channel are relatively not communicated; when the valve device is in a first valve opening state, the main valve opening is closed, the auxiliary valve opening is opened, and the first channel is communicated with the second channel; when the valve device is in a second valve opening state, the main valve opening is opened, the auxiliary valve opening is opened, and the first channel is communicated with the second channel.

10. The valve cartridge assembly of claim 1, wherein: the valve core assembly comprises a main valve core assembly, an auxiliary valve core assembly and a screw rod assembly, the main valve core assembly is provided with an auxiliary valve port, the auxiliary valve core assembly comprises an auxiliary valve core, the auxiliary valve core comprises a large-diameter section and a small-diameter section, the small-diameter section is closer to the auxiliary valve port than the large-diameter section, the large-diameter section is in transmission connection with the screw rod assembly, the small-diameter section of the auxiliary valve core assembly can adjust the opening of the auxiliary valve port, the small-diameter section is provided with a first opening, a first pore canal and a second opening, the first opening is located at one end of the small-diameter section and communicated with the first pore canal, the small-diameter section comprises a second side wall, the second opening is located at the second side wall and communicated with the first pore canal, the valve core assembly is provided with a first clearance channel, the first clearance channel is located between the large-diameter section and the main valve core assembly, and the second opening is communicated with the first clearance channel, and the first clearance channel and the first opening and the first clearance channel are formed by at least one part of the first opening and the first clearance channel.

11. The valve cartridge assembly of claim 10, wherein: the main valve core assembly is provided with a containing cavity, at least part of the large-diameter section is located in the containing cavity, the wall forming the containing cavity comprises a second bottom wall, and at least part of the second opening is located between the second bottom wall and the large-diameter section along the axial direction of the valve core assembly.

12. The valve cartridge assembly of claim 11, wherein: the valve core assembly comprises a first elastic piece, at least part of the first elastic piece is located in the accommodating cavity, the large-diameter section comprises a first abutting portion, the first elastic piece is located between the first abutting portion and the second bottom wall along the axial direction of the valve core assembly, the first elastic piece is in a compressed state, the main valve core assembly comprises a main valve core and a first connecting piece, the main valve core is fixedly connected with the first connecting piece, the first elastic piece is located between the first connecting piece and the first elastic piece along the axial direction of the valve core assembly.

13. The valve cartridge assembly of claim 12, wherein: the first clearance channel is provided with a first sub-channel and a second sub-channel, the first sub-channel is positioned between the second bottom wall and the large-diameter section along the axial direction of the valve core assembly, the first sub-channel is communicated with the second opening, the wall forming the accommodating cavity comprises a third side wall, the second sub-channel is positioned between the third side wall and the large-diameter section along the radial direction of the valve core assembly, the second sub-channel is communicated with the first sub-channel, and at least part of the first elastic piece is positioned in the second sub-channel.

14. The valve cartridge assembly of claim 13, wherein: the first abutment forms part of the wall of the second sub-channel; and/or the first abutting part is provided with a first communication hole, and the first communication hole is communicated with the second sub-channel.

15. The valve cartridge assembly of claim 14, wherein: the first connector forms part of the wall of the second sub-channel; and/or the first connecting piece is provided with a second communication hole, and the second communication hole is communicated with the second sub-channel.

16. The valve cartridge assembly of claim 15, wherein: the valve core assembly comprises a first sealing piece and a second sealing piece, the small-diameter section and the main valve core assembly compress the first sealing piece along the radial direction of the valve core assembly, the main valve core assembly is provided with a guide hole, the guide hole is matched with the small-diameter section, and the second sealing piece extends along the circumferential direction of the main valve core assembly.

17. The valve cartridge assembly of claim 16, wherein: the large-diameter section is provided with a second pore canal, the second pore canal is communicated with the first pore canal, the screw rod assembly is partially positioned in the second pore canal, a second clearance channel is arranged between the screw rod assembly and the large-diameter section, the second clearance channel is communicated with the second pore canal, and the second pore canal and the second clearance channel form a part of the balance channel.

18. The valve cartridge assembly of claim 17, wherein: the valve core assembly comprises a second elastic piece, at least part of the second elastic piece is located in the second pore canal, along the axial direction of the valve core assembly, the screw rod assembly and the auxiliary valve core assembly extrude the second elastic piece, the large-diameter section comprises a fourth side wall, the fourth side wall is provided with a third opening, the third opening is communicated with the second pore canal, along the axial direction of the valve core assembly, and at least part of the third opening is located on one side of the first connecting piece.

19. A valve device comprising a valve cartridge assembly according to any one of claims 10-18, said valve device comprising a drive member and a valve seat assembly, said drive member being capable of moving said valve cartridge assembly in an axial direction of said valve device, said valve seat assembly having a main valve port and a first through hole, at least a portion of said valve cartridge assembly being located in said first through hole, said valve cartridge assembly being capable of adjusting an opening degree of said main valve port, said valve cartridge assembly being in radial direction of said valve cartridge assembly, said valve cartridge assembly compressing said second seal with said valve seat assembly, said valve device having a first passage, a second passage, a first chamber and a balancing passage, said first chamber and said first passage being located on different sides of said valve cartridge assembly in an axial direction of said valve device, said first chamber being closer to said drive member than said first passage, said second passage being located radially outside of said valve cartridge assembly, at least a portion of said balancing passage being formed in said valve cartridge assembly, said balancing passage being in communication with said first chamber, said balancing passage being in communication with said first passage, said valve device having an open state and a closed state,

When the valve device is in a valve closing state, the main valve opening is closed, the auxiliary valve opening is closed, and the first channel and the second channel are relatively not communicated; when the valve device is in a first valve opening state, the main valve opening is closed, the auxiliary valve opening is opened, and the first channel is communicated with the second channel; when the valve device is in a second valve opening state, the main valve opening is opened, the auxiliary valve opening is opened, and the first channel is communicated with the second channel.