CN212131323U - Electromagnetic valve - Google Patents
Electromagnetic valve Download PDFInfo
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- CN212131323U CN212131323U CN202020267017.4U CN202020267017U CN212131323U CN 212131323 U CN212131323 U CN 212131323U CN 202020267017 U CN202020267017 U CN 202020267017U CN 212131323 U CN212131323 U CN 212131323U
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Abstract
The utility model relates to a solenoid valve, which comprises a valve body and a valve component, wherein the valve body is internally provided with a fluid channel and a containing cavity, and the valve component is arranged in the containing cavity; the valve component comprises a valve core seat arranged at the bottom of the accommodating cavity, a valve core matched with the valve core seat and used for closing or opening the fluid channel, a driving mechanism driving the valve core to reciprocate and a sealing shell forming a sealing space with the accommodating cavity; the driving mechanism comprises a screw rod and a driving element for driving the screw rod to rotate, an axial through hole is formed in the valve core, the screw rod is connected with the axial through hole through threads, and the threads convert the rotation of the screw rod into the linear motion of the valve core; and a pressure balance channel is arranged on the screw rod and/or the valve core, and fluid entering the valve body is filled in the cavity where the upper end surface and the lower end surface of the valve core are located through the pressure balance channel. Compared with the prior art, the utility model has the advantages of the case is easy to be driven, the valve body is miniaturized, flow control is accurate stable.
Description
Technical Field
The utility model relates to a solenoid valve especially relates to a case self-balancing solenoid valve.
Background
As the automobile air conditioning system is easy to leak, along with the improvement of environmental protection consciousness and the landing of environmental protection laws and regulations, the rhythm of working refrigerant medium substitution is the most urgent, and natural working medium refrigerants (such as NH)3、HO2、HC、CO2And air) CO2Due to the characteristics of low greenhouse effect, no color, no taste, no toxicity, no flammability, no corrosiveness to common materials and the like, the composite material is most likely to be widely applied in practice. However, CO2The critical pressure of the refrigerant is high (Pc is 7.38MPa) and the critical temperature of the refrigerant is low (Tc is 31.25 ℃), in order to achieve good comprehensive refrigeration performance, a refrigeration system using carbon dioxide as a refrigerant must work in a transcritical region, the working pressure exceeds the critical pressure, and the working pressure is much higher than that of the current automobile air-conditioning system。
The existing electronic expansion valve/electronic stop valve working in a high-pressure refrigeration system smoothly drives a valve core under high pressure to move, on one hand, the driving force is increased by adopting a large-specification motor, a speed reducer and other modes, and the mode has the defects of complex structure, high energy consumption, difficulty in miniaturization and the like; on the other hand, the end of the valve core is designed into a needle point shape, the cross-sectional area is reduced, and the force acting on the valve core is reduced, and the mode comprises the following steps: complex valve core processing, large flow regulation nonlinear area and the like.
SUMMERY OF THE UTILITY MODEL
The object of the utility model is to provide an electromagnetic valve for overcoming the defects of the prior art that the miniaturization is difficult, the energy consumption is large, the processing is complicated, and the flow regulation is nonlinear, the electromagnetic valve can be used as an electronic expansion valve or a stop valve, and the fluid medium is CO in an automobile air conditioning system2。
The purpose of the utility model can be realized through the following technical scheme:
a solenoid valve comprises a valve body and a valve assembly, wherein a fluid channel and a containing cavity are formed in the valve body, the valve assembly is installed in the containing cavity, and the fluid channel is communicated with the containing cavity; the valve assembly comprises a valve core seat arranged at the bottom of the accommodating cavity, a valve core matched with the valve core seat and used for closing or opening the fluid channel, a driving mechanism for driving the valve core to reciprocate and a sealing shell forming a sealing space with the accommodating cavity;
the driving mechanism comprises a screw rod and a driving element for driving the screw rod to rotate, an axial through hole is formed in the valve core, the screw rod is connected with the axial through hole through a thread, and the thread converts the rotation of the screw rod into the linear motion of the valve core; and a pressure balance channel is arranged on the screw rod and/or the valve core, and fluid entering the valve body is filled in the cavity where the upper end surface and the lower end surface of the valve core are located through the pressure balance channel.
And a platform surface is processed on the threaded cylindrical surface of the screw rod, and the pressure balance channel is formed between the platform surface and the axial through hole of the valve core.
Preferably, the thread between the screw rod and the axial through hole is a fine-thread precise thread.
The utility model discloses a set up the upper and lower terminal surface that pressure balance passageway made the fluid can be full of the case, and ensure as far as possible when the design about terminal surface lifting surface area unanimous to reach and just can drive the plug up-and-down motion with very little drive power, improve the response frequency of case motion, realize the miniaturization of valve.
The valve core seat is provided with a valve core seat fluid channel and a flow channel inclined plane for regulating flow, and the end part of the flow channel inclined plane close to the valve core seat fluid channel is close to the center of the valve core seat; the valve core sequentially comprises a large-diameter section, an inclined plane section, a small-diameter section and an inclined plane at the end part of the valve core; the diameter of the small diameter section is smaller than that of the valve core seat fluid channel, and the diameter of the large diameter section is larger than that of the valve core seat fluid channel. The screw rod is meshed with the valve core through the fine-tooth precise thread pair, so that the movement precision of the valve core is improved, and the flow regulation precision is further improved.
The utility model designs the end structure of the valve core into a flat-end inclined plane type, thus improving the linear range of flow regulation; the initial state can be a full flow state, along with the downward movement of the valve core, in a large flow stage, an annular channel between the end inclined plane of the valve core and the inclined plane of the flow channel is a flow path of fluid, and the sectional area of the flow path can be linearly adjusted by adjusting the upper position and the lower position of the valve core, so that the flow of the fluid is linearly adjusted; along with the movement of the valve core to the closing position, a fixed circulation path with a smaller sectional area is formed between the small-diameter section and the flow channel inclined plane, so that constant flow output under a small flow state is realized, and the problem of unstable operation of the valve body under the small flow state is solved; along with the further downward movement of the valve core, the inclined plane at the end part of the valve core is contacted with the inclined plane of the flow channel of the valve core seat, so that the fluid channel is completely shut off and is used as an electronic stop valve. Therefore, the utility model discloses can realize stable output and the linear regulation under large-traffic under the low discharge, adjust the precision height.
The side surface of the valve core seat is circumferentially sealed with the valve body through a circumferential sealing ring, and the lower end surface of the valve core seat is end-sealed with the valve body through an end sealing ring.
The valve core is provided with a guide boss, the accommodating cavity is internally provided with a guide groove arranged along the axial direction of the valve core, and the guide boss is connected with the guide groove in a sliding manner.
The rotary motion of lead screw is converted into the up-and-down motion of case through the cooperation of direction recess and direction boss, avoids the case to take place to rotate, improves the stability of case motion. The utility model discloses in, the direction recess can directly set up on the inner wall that holds the chamber, also can set up an solitary inner member that has the direction recess and accomplish the direction function, for example with the direction recess setting on the rotor mount pad.
And the circumferential sealing ring and the end sealing ring are O-shaped sealing rings.
The driving element comprises a rotor arranged on the rotor mounting seat and a stator sleeved on the periphery of the rotor and driving the rotor to rotate; the rotor mounting seat is fixed on the valve body through threads, a central stepped through hole for accommodating the valve core is arranged in the rotor mounting seat, and the guide groove is arranged in the central stepped through hole.
The sealing shell is covered outside the rotor, and the lower end of the sealing shell is fixedly connected with the rotor mounting seat through a spigot; the rotor is limited and installed inside the sealed shell through an upper bearing and a lower bearing, the lower bearing is installed on a step of a central step-shaped through hole of the rotor installation seat, the upper bearing is installed in a bearing seat, the circumference of the bearing seat is installed on the inner wall of the sealed shell in a matched mode, and the upper end of the bearing seat is abutted to the inner surface of the sealed shell.
Preferably, the seal housing and the rotor mount are fixedly connected by laser welding.
The outer side wall of the rotor mounting seat is provided with a notch for placing a lower sealing ring, and the rotor mounting seat and the valve body are sealed through the lower sealing ring.
A stator shell is arranged outside the stator and fixedly connected to the upper end face of the valve body; the outer side wall of the rotor mounting seat is provided with a notch for placing an upper sealing ring, and the rotor mounting seat and the stator shell are subjected to dustproof sealing through the upper sealing ring.
The electromagnetic valve also comprises a liquid inlet seat arranged above the valve core seat, the upper end of the valve core seat is provided with a spigot structure, and the liquid inlet seat is connected with the valve core seat in a positioning way through the spigot structure; the lower section of the liquid inlet seat is provided with a plurality of liquid inlet holes which are circumferentially arranged along the liquid inlet seat; and a guide hole matched with the valve core is formed in the center of the liquid inlet seat.
The guiding hole top of feed liquor seat is equipped with the axial seal spare of step pore structure and holds the chamber, this axial seal spare hold the intracavity be equipped with sealing ring, the cover that the case contact is connected are located the axial seal O type circle in the sealing ring outside and locate the cab apron of crossing on sealing ring and axial seal O type circle upper portion, the rotor mount pad is through this cab apron extrusion of crossing the axial seal O type circle.
Be equipped with the notch that the feed liquor seat sealing washer was placed to a plurality of on the lateral wall of feed liquor seat, valve body and feed liquor seat pass through the feed liquor seat sealing washer carries out circumference sealed.
Follow the axial direction of feed liquor seat, the length of guiding hole is 3/10 ~ 2/5 of feed liquor seat total length. Through optimizing the axial fit length of case and feed liquor seat, precision and the rigidity of direction when promoting the case up-and-down motion reduce the deflection deformation and rock when case side atress, promote flow control's stationarity.
And a stator shell is arranged outside the stator and fixed on the upper end surface of the valve body. The driving and controlling plate can be fixed in the stator shell, is connected with a coil of the stator in a Pin needle compression joint mode, is powered by the plug, is provided with a control and driving circuit and a chip, realizes the control of the stator, and further controls the rotating speed, the rotating angle and the output torque of the rotor.
Be equipped with a plurality of on the same valve body and hold the chamber, every holds the intracavity and all installs the valve module.
By arranging a plurality of valves (more than 2) on one valve body, connecting pipelines between the valves are reduced, various functional combinations can be realized, and the requirement of automobile CO is met2The air conditioning system has the requirement for adjusting the refrigerant under different working conditions.
And the valve body is provided with a pressure relief channel communicated with the fluid channel, and a pressure relief valve is installed at the port of the pressure relief channel.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the valve core is easy to drive, and meets the miniaturization requirement: the mode of flattening the screw rod enables working media to fill the upper end face and the lower end face of the valve core, and the stress areas of the upper end face and the lower end face are ensured to be consistent as far as possible in design, so that the valve core can be driven to move up and down by small driving force, the response frequency of the movement of the valve core is improved, and the miniaturization and the light weight of the valve are realized; the processing mode of the flat wire rod is easy to process, and the cost is low;
(2) the flow regulation precision is high, and the linear range of the regulation curve is large: the utility model firstly designs the end structure of the valve core into a flat-mouth inclined plane structure, thereby satisfying the linear regulation of flow and the stable output in a small flow state; the screw rod and the valve core can be meshed through a fine-tooth precise thread pair, so that the movement precision of the valve core is further improved, and the flow regulation precision is further improved; because the automobile air-conditioning system has higher working pressure, the working medium is easy to leak, the utility model designs a perfect sealing mechanism, effectively reduces the leakage rate of the refrigerant between the inlet and the outlet, leads the precision of the flow regulation to be higher, and particularly leads the stopping effect of the utility model to be better when the utility model is used as a stop valve in a small flow regulation area; the utility model arranges the end sealing ring and the circumferential sealing ring between the valve core seat and the valve body; a plurality of (more than 2) liquid inlet seat sealing rings are arranged between the liquid inlet seat and the valve body; a lower sealing ring is arranged between the rotor mounting seat and the valve body; a sealing ring and an axial sealing o-shaped ring are arranged between the rotor mounting seat and the valve core;
(3) the flow regulation has high stability: the utility model optimizes the axial matching length of the valve core and the liquid inlet seat, improves the guiding precision and rigidity when the valve core moves up and down, reduces the deflection deformation and the shaking when the side surface of the valve core is stressed, and improves the stability of flow regulation;
(4) reliable sealing and easy assembly: the utility model discloses in the range upon range of formula equipment of each part, each relevant part passes through terminal surface and tang realization centering assembly, through control tang cooperation size's difference and tolerance, the deflection of the sealed shape circle of accurate control O realizes reliably sealing.
(5) The streamline design of the stator shell appearance is arranged, unnecessary materials are removed, and the beautification, miniaturization and light weight of the valve bank are achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic top view of the present invention;
FIG. 3 is a sectional view taken along line H-H of FIG. 2;
FIG. 4 is a sectional view taken along line J-J of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4;
fig. 6 is a front view of the valve body of the present invention;
FIG. 7 is a cross-sectional view taken along line M-M of FIG. 6;
fig. 8 is a top view of the valve body of the present invention;
FIG. 9 is a cross-sectional view taken along line K-K of FIG. 8;
fig. 10 is a top view of the valve cartridge of the present invention;
FIG. 11 is a cross-sectional view taken along line Q-Q of FIG. 10;
fig. 12 is a front sectional view of the valve core seat of the present invention;
fig. 13 is a front view, in cross section, of the middle liquid inlet seat of the present invention;
fig. 14 is a top view of the rotor mounting base of the present invention;
FIG. 15 is a cross-sectional view taken along line P-P of FIG. 14;
in the figure, 1 is a valve body, 101 is a first accommodating cavity, 102 is a second accommodating cavity, 103 is a longitudinal channel, 104 is a first transverse channel, 105 is a second transverse channel, 106 is a third transverse channel, 2 is a valve core seat, 201 is a spigot structure of the valve core seat, 202 is a flow channel inclined plane, 203 is a valve core seat fluid channel, 3 is a liquid inlet seat, 301 is a liquid inlet hole, 302 is a liquid inlet seat notch, 303 is a guide hole, 304 is an axial seal accommodating cavity, 4 is a rotor mounting seat, 401 is a central step-shaped through hole, 402 is a guide groove, 5 is a valve core, 501 is a step hole, 502 is a fine-tooth precision internal thread, 503 is a guide boss, 504 is a valve core end inclined plane, 505 is a small-diameter section, 506 is an inclined plane section, 507 is a large-diameter section, 6 is a lead screw, 7 is a rotor, 8 is a lower bearing, 9 is an upper bearing, 10 is a bearing seat, 11 is a sealing shell, 12 is a stator control plate, 14 is a pressure release valve, 15 is an end sealing ring, 16 is a circumferential sealing ring, 17 is a liquid inlet seat sealing ring, 18 is a sealing ring, 19 is an axial sealing o-shaped ring, 20 is a transition plate, 21 is a lower sealing ring, 22 is an upper sealing ring, and 23 is a stator shell.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
Examples
A solenoid valve, as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, comprises a valve body 1, a valve core seat 2, a liquid inlet seat 3, a rotor mounting seat 4, a valve core 5, a screw rod 6, a rotor 7, a lower bearing 8, an upper bearing 9, a bearing seat 10, a sealing shell 11, a stator 12, a stator control plate 13, a pressure relief valve 14, a stator shell 23 and other valve components.
As shown in fig. 6, 7, 8 and 9, the valve body 1 is provided with a first accommodating cavity 101, a second accommodating cavity 102, a longitudinal channel 103, a first transverse channel 104, a second transverse channel 105 and a third transverse channel 106; a first transverse channel 104 is communicated with a longitudinal channel 103 in the valve body 1, a first accommodating cavity 101 and a second accommodating cavity 102 are communicated with the longitudinal channel 103 through respective vertical channels, a pressure release valve 14 is installed at the end of the longitudinal channel 103, and when the pressure in the longitudinal channel 103 exceeds a set value, the pressure release valve 14 is opened to release the pressure; the second transverse channel 105 communicates with the first containing chamber 101; the third transverse passage 106 is communicated with the second accommodating cavity 102, the first transverse passage 104, the second transverse passage 105, the third transverse passage 106 and the longitudinal passage 103 form a fluid passage, fluid can enter from the second transverse passage 105 and the third transverse passage 106, flow out through the longitudinal passage 103 and the first transverse passage 104, can flow in from the first transverse passage 104, flow out from the second transverse passage 105, flow in from the second transverse passage 105 and flow out from the first transverse passage 104, and the flow of the fluid in the solenoid valve is bidirectional. The holding cavity is cylindrical, the axial design has a step, and two sets of valve components are respectively installed in the two holding cavities. The valve core seat 2, the liquid inlet seat 3 and the rotor mounting seat 4 are sequentially mounted in the accommodating cavity from bottom to top, the screw rod 6 is connected with the valve core 5 through threads, and the rotation of the screw rod 6 is converted into the up-and-down linear motion of the valve core 5 through threads. The valve core 5 and the valve core seat 2 are matched with each other to realize flow regulation.
As shown in fig. 10 and 11, a through stepped hole 501 is formed in the center of the valve element 5, a fine-pitch precision internal thread 502 that engages with the screw rod 6 is formed in the upper section of the stepped hole 501, and the valve element 5 is provided with a guide boss 503, a large diameter section 507, a slope section 506, a small diameter section 505, and a valve element end slope 504 that is provided on the bottom end face of the valve element 5 in this order from top to bottom. As shown in fig. 4, the valve core seat 2 is placed at the bottom of the accommodating cavity, as shown in fig. 12, a notch for placing an o-shaped sealing ring is formed in the valve core seat 2, an end sealing ring 15 and a circumferential sealing ring 16 are respectively placed in the notch, and end face sealing and circumferential sealing are realized by means of deformation of the sealing ring under the action of pressure. The upper end of the valve seat 2 is provided with a spigot structure 201 and a flow channel inclined plane 202, and the valve seat 2 is provided with a valve seat fluid channel 203. The lower end surface of the valve core 5 is designed with a valve core end inclined surface 504 matched with the flow channel inclined surface 202, in the large flow regulation stage, a channel between the valve core end inclined surface 504 and the flow channel inclined surface 202 is a flow path of the refrigerant, and the sectional area of the flow path is linearly regulated by regulating the upper and lower positions of the valve core 5, so that the flow rate of the refrigerant is linearly regulated. The small diameter section 505 of the valve core 5 has a size slightly smaller than the bore diameter of the valve core seat fluid channel 203; the large diameter section 507 is larger than the bore diameter of the valve core seat fluid channel 203, and when the valve core descends to a certain degree, the inclined surface section 506 is in contact with the valve core seat fluid channel 203, so that the function of the stop valve is realized. By adjusting different positions of the valve core 5 in the valve core seat 2, the same valve can stop the flow of the refrigerant between the channels, namely, the valve is used as a stop valve, and can realize the expansion of the refrigerant between the channels, namely, the valve is used as an expansion valve.
The liquid inlet seat 3 is arranged above the valve core seat 2 through the matching of a spigot at the lower end, as shown in fig. 13, a plurality of liquid inlet holes 301 are formed in the circumferential direction of the lower part of the liquid inlet seat 3 so as to reduce the flow velocity of the entering refrigerant, reduce the noise generated by the flowing of the refrigerant and avoid the refrigerant from directly impacting the valve core 5; the liquid inlet seat 3 is provided with a plurality of liquid inlet seat notches 302 (two in fig. 13) for placing o-shaped sealing rings, the liquid inlet seat sealing rings 17 are respectively placed in the liquid inlet seat notches 302, and circumferential sealing is realized by means of deformation of the sealing rings under the action of pressure. The center of the liquid inlet seat 3 is provided with a guide hole 303 for accommodating the valve core 5 to realize centering support for the up-and-down movement of the valve core 5, the upper end surface of the liquid inlet seat 3 is provided with an axial sealing element accommodating cavity 304, and a sealing ring 18, an axial sealing o-shaped ring 19 and a transition plate 20 are placed in the axial sealing element accommodating cavity 304. The force transmitted from the rotor mounting seat 4 enables the axial sealing o-shaped ring 19 to deform through the transition plate 20 so as to press the sealing ring 18 to be tightly attached to the valve core 5 supported in the guide hole 303, and sealing during up-and-down movement of the valve core 5 is ensured; the large-diameter section 507 of the valve core 5 is in oil film sliding fit with the guide hole 303 to ensure the linear motion of the valve core 5.
The screw rod 6 is fixedly connected with the rotor 7 in an integrated pouring or interference fit mode, a platform surface is processed on a threaded cylindrical surface of the screw rod 6, fine-tooth precise external threads are processed on the outer circumference of the screw rod 6 and meshed with fine-tooth precise internal threads 502, a pressure balance channel is formed between the platform surface of the screw rod 6 and a stepped hole 501 of the valve core 5, the pressure balance channel enables a cavity where the upper end surface of the valve core 5 is located and a cavity where the lower end surface of the valve core 5 is located to be communicated, a refrigerant fills the cavity where the upper end surface and the lower end surface of the valve core 5 are located through a gap between the platform surface and the stepped hole 501, and the upper end surface and the lower end surface of the refrigerant are located in the same pressure area of the refrigerant.
As shown in fig. 5, the rotor 7 is made of permanent magnetic silicon steel sheets, is accommodated in the inner cavity of the sealed housing 11, and is supported by the upper bearing 9 and the lower bearing 8, and under the supporting limit of the upper bearing and the lower bearing, the rotor is driven by the stator 12 to rotate around the axis, and the up-and-down movement of the rotor is eliminated. The upper bearing 9 is arranged in a bearing seat 10, the circumference of the bearing seat 10 is matched in the inner cavity of the sealed shell 11, and the upper end of the bearing seat props against the bottom surface of the sealed shell 11. The sealing shell 11 is matched with the rotor mounting seat 4 through a spigot, and is fixedly connected with the rotor mounting seat 4 in a laser welding mode. As shown in fig. 1 and 5, the stator 12 is sleeved on the periphery of the rotor shell 11, and is fixedly connected with the upper end face of the valve body 1 through a bolt, the stator shell 23 is sleeved outside the stator 12, the driving and controlling plate 13 is fixed in the stator shell 23, and is connected with the coil of the stator in a Pin needle crimping manner, and is powered through a plug, and a control and driving circuit and a chip are configured on the stator to realize stator control, and further control the rotation speed, the rotation angle and the output torque of the rotor.
In the embodiment, two containing cavities and valve components are arranged on the same valve body 1, connecting pipelines between the valves are reduced, multiple functional combinations can be realized, and the requirement of automobile CO is met2Different working conditions of air conditioning systemAnd (5) adjusting the refrigerant.
The working principle of the embodiment is as follows:
the initial state may be a full flow state (the cross-sectional area of the channel between spool end ramp 504 of spool 5 and flow channel ramp 202 of spool seat 2 is greater than the cross-sectional area of spool seat fluid channel 203 of spool seat 2), under the control of drive plate 13, rotor 7 rotates, through the meshing transmission of the fine-tooth precise thread pair, the valve core 5 moves downwards, the gap between the inclined plane 504 at the end part of the valve core and the inclined plane 202 of the flow passage is gradually reduced, and the valve core enters a large-flow linear regulation state, the refrigerant flow rate is linearly decreased (serving as an electronic expansion valve) through the first and second lateral passages 103 and 105 (or the third lateral passage 106), when the small diameter section 505 of the spool 5 begins to extend into the spool seat fluid passage 203 of the spool seat 2, entering a constant flow output under a small flow state, wherein the flow cross section at the moment is the constant gap area between the valve core seat fluid channel 203 and the small-diameter section 505; the valve core 5 moves further downwards, the slope section 506 of the valve core 5 contacts with the valve core seat fluid channel 203 of the valve core seat 2, and the refrigerant channel is completely closed (used as an electronic stop valve). The rotor moves reversely, and the working state is from a cut-off state, a small flow constant output state, a large flow linear regulation state and a full flow state.
In the valve body structure of the embodiment, the end structure of the valve core 5 is designed into a flat-end inclined plane type, so that the linear range of flow regulation is enlarged; an end sealing ring 15 and a circumferential sealing ring 16 are arranged between the valve core seat 2 and the valve body 1; 2 liquid inlet seat sealing rings 17 are arranged between the liquid inlet seat 3 and the valve body 1; a lower sealing ring 21 is arranged between the rotor mounting seat 4 and the valve body 1; a sealing ring 18 and an axial sealing o-shaped ring 19 are arranged between the rotor mounting seat 4 and the valve core 5, and the sealing design can effectively reduce the leakage amount of the refrigerant between the inlet and the outlet, so that the accuracy of flow regulation is higher, especially in a small-flow regulation area. When the valve is used as a stop valve, the stop effect is better; by means of cutting the flat wire rod 6 (easy to process and low in cost), the upper end surface and the lower end surface of the valve core are filled with refrigerant, and the stress areas of the upper end surface and the lower end surface are ensured to be consistent as far as possible in design, so that the valve core can be driven by small driving force to move up and downThe response frequency of the motion of the valve core 5 is improved; miniaturization of the valve is realized; fine-tooth precise thread pair meshing is designed, so that the movement precision of the valve core 5 is improved, and the flow regulation precision is further improved; the axial matching length of the valve core 5 and the liquid inlet seat 3 is optimized, the guiding precision and rigidity of the valve core 5 during up-and-down movement are improved, the deflection deformation and the shaking of the valve core 5 during lateral force application are reduced, and the stability of flow regulation is improved; a plurality of (2 or more) valves are arranged on the same valve body 1, connecting pipelines among the valves are reduced, various functional combinations can be realized, and the requirement of CO (carbon monoxide) of an automobile is met2The air conditioning system has the regulation requirements on the refrigerant under different working conditions; the method comprises the following steps of (1) carrying out stacked assembly on parts, realizing centering assembly on each related part through an end face and a spigot, and accurately controlling the deformation of an O-shaped sealing ring by controlling the difference and the tolerance of the fit size of the spigot so as to realize reliable sealing; the streamline design of the appearance, and remove unnecessary material, have realized the beautification of the valve block, miniaturization, light; the control panel is designed in the stator shell, so that the driving and controlling integration is realized, the reduced electric connecting cables are favorable for modularization and miniaturization of the valve bank.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. A solenoid valve comprises a valve body (1) and a valve assembly, wherein a fluid channel and an accommodating cavity are formed in the valve body, and the valve assembly is installed in the accommodating cavity; it is characterized in that the preparation method is characterized in that,
the valve assembly comprises a valve core seat (2) arranged at the bottom of the accommodating cavity, a valve core (5) matched with the valve core seat (2) and used for closing or opening the fluid channel, a driving mechanism for driving the valve core (5) to reciprocate and a sealing shell (11) forming a sealing space with the accommodating cavity;
the driving mechanism comprises a screw rod (6) and a driving element for driving the screw rod (6) to rotate, an axial through hole is formed in the valve core (5), the screw rod (6) is connected with the axial through hole through threads, and the threads convert the rotation of the screw rod (6) into the linear motion of the valve core (5); and a pressure balance channel is arranged on the screw rod (6) and/or the valve core (5), and fluid entering the valve body (1) is filled in the cavity where the upper end surface and the lower end surface of the valve core (5) are located through the pressure balance channel.
2. The electromagnetic valve according to claim 1, characterized in that the threaded cylindrical surface of the screw (6) is provided with a platform surface, and the platform surface and the axial through hole of the valve core (5) form the pressure balance channel.
3. A solenoid valve according to claim 1, characterized in that the valve core seat (2) is provided with a valve core seat fluid channel (203) and a flow channel inclined plane (202) for regulating the flow, and the end of the flow channel inclined plane (202) close to the valve core seat fluid channel (203) is close to the center of the valve core seat (2); the valve core (5) sequentially comprises a large-diameter section (507), a slope section (506), a small-diameter section (505) and a valve core end slope (504); the diameter of the small diameter section (505) is smaller than the diameter of the valve core seat fluid channel (203), and the diameter of the large diameter section (507) is larger than the diameter of the valve core seat fluid channel (203).
4. The electromagnetic valve according to claim 1, characterized in that the valve core (5) is provided with a guide boss (503), the accommodating cavity is provided with a guide groove (402) arranged along the axial direction of the valve core (5), and the guide boss (503) is slidably connected with the guide groove (402).
5. A solenoid valve according to claim 4, wherein the receiving cavity is a cylindrical cavity with a step structure inside, the driving mechanism further comprises a rotor mounting seat (4) mounted on the step structure in a matching manner, the driving element comprises a rotor (7) mounted on the rotor mounting seat (4) and a stator (12) sleeved on the periphery of the rotor (7) and driving the rotor to rotate; the rotor mounting seat (4) is fixed on the valve body (1) through threads, a central stepped through hole (401) for accommodating the valve core (5) is formed in the rotor mounting seat, and the guide groove (402) is formed in the central stepped through hole (401).
6. A solenoid valve according to claim 5, characterized in that the sealing housing (11) covers the outside of the rotor (7) and has a lower end fixedly connected with the rotor mounting seat (4) through a spigot; the rotor (7) is installed inside the sealing shell (11) in a limiting mode through an upper bearing (9) and a lower bearing (8), the lower bearing (8) is installed on a step of a central step-shaped through hole (401) of the rotor installation seat (4), the upper bearing (9) is installed in a bearing seat (10), the circumference of the bearing seat (10) is installed on the inner wall of the sealing shell (11) in a matched mode, and the upper end of the bearing seat (10) abuts against the inner surface of the sealing shell (11).
7. The electromagnetic valve according to claim 5, characterized by further comprising a liquid inlet seat (3) installed above the valve core seat (2), wherein a spigot structure is provided at the upper end of the valve core seat (2), and the liquid inlet seat (3) is connected with the valve core seat (2) in a positioning manner through the spigot structure; the lower section of the liquid inlet seat (3) is provided with a plurality of liquid inlet holes (301) which are circumferentially arranged along the liquid inlet seat (3); and a guide hole (303) matched with the valve core (5) is formed in the center of the liquid inlet seat (3).
8. A solenoid valve according to claim 7,
an axial sealing element accommodating cavity (304) with a step hole structure is arranged above a guide hole (303) of the liquid inlet seat (3), a sealing ring (18) in contact connection with the valve core (5), an axial sealing O-shaped ring (19) sleeved on the outer side of the sealing ring (18) and a transition plate (20) arranged at the upper parts of the sealing ring (18) and the axial sealing O-shaped ring (19) are arranged in the axial sealing element accommodating cavity (304), and the rotor mounting seat (4) extrudes the axial sealing O-shaped ring (19) through the transition plate (20); the outer side wall of the liquid inlet seat (3) is provided with a plurality of notches for placing liquid inlet seat sealing rings (17), and the valve body (1) and the liquid inlet seat (3) are circumferentially sealed through the liquid inlet seat sealing rings (17);
the side surface of the valve core seat (2) is circumferentially sealed with the valve body (1) through a circumferential sealing ring (16), and the lower end surface of the valve core seat (2) is end-sealed with the valve body (1) through an end sealing ring (15);
a notch for placing a lower sealing ring (21) is formed in the outer side wall of the rotor mounting seat (4), and the rotor mounting seat (4) and the valve body (1) are sealed through the lower sealing ring (21); a stator shell (23) is arranged outside the stator (12), and the stator shell (23) is fixedly connected to the upper end face of the valve body (1); the outer side wall of the rotor mounting seat (4) is provided with a notch for placing an upper sealing ring (22), and the rotor mounting seat (4) and the stator shell (23) are subjected to dustproof sealing through the upper sealing ring (22).
9. A solenoid valve according to claim 1, characterized in that a plurality of receiving chambers are provided in the same valve body (1), each receiving chamber being fitted with a valve assembly.
10. A solenoid valve according to claim 1, characterised in that the valve body (1) is provided with a pressure relief passage communicating with the fluid passage, the port of which is fitted with a pressure relief valve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020267017.4U CN212131323U (en) | 2020-03-06 | 2020-03-06 | Electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020267017.4U CN212131323U (en) | 2020-03-06 | 2020-03-06 | Electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212131323U true CN212131323U (en) | 2020-12-11 |
Family
ID=73673991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020267017.4U Active CN212131323U (en) | 2020-03-06 | 2020-03-06 | Electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212131323U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352797A (en) * | 2022-01-20 | 2022-04-15 | 广东威灵电机制造有限公司 | Electronic expansion valve, refrigeration equipment and automobile |
| CN114542734A (en) * | 2022-01-17 | 2022-05-27 | 杭州山木汽车热管理科技有限公司 | Plug-in type bidirectional electronic expansion valve |
| WO2022116550A1 (en) * | 2020-12-04 | 2022-06-09 | 上海克来机电自动化工程股份有限公司 | Electromagnetic valve having hard sealing structure |
-
2020
- 2020-03-06 CN CN202020267017.4U patent/CN212131323U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116550A1 (en) * | 2020-12-04 | 2022-06-09 | 上海克来机电自动化工程股份有限公司 | Electromagnetic valve having hard sealing structure |
| CN114542734A (en) * | 2022-01-17 | 2022-05-27 | 杭州山木汽车热管理科技有限公司 | Plug-in type bidirectional electronic expansion valve |
| CN114352797A (en) * | 2022-01-20 | 2022-04-15 | 广东威灵电机制造有限公司 | Electronic expansion valve, refrigeration equipment and automobile |
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Address after: 1555 Luodong Road, Baoshan District, Shanghai, 200949 Patentee after: SHANGHAI KELAI ELECTROMECHANICAL AUTOMATION ENGINEERING Co.,Ltd. Patentee after: Shanghai aokewei Intelligent Equipment Co.,Ltd. Address before: 1555 Luodong Road, Baoshan District, Shanghai, 200949 Patentee before: SHANGHAI KELAI ELECTROMECHANICAL AUTOMATION ENGINEERING Co.,Ltd. Patentee before: SHANGHAI KELAI LUOJIN ELECTRICAL AND MECHANICAL AUTOMATION ENGINEERING Co.,Ltd. |