CN113464712A - Electrically operated valve and method for manufacturing the same - Google Patents

Electrically operated valve and method for manufacturing the same Download PDF

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Publication number
CN113464712A
CN113464712A CN202010236881.2A CN202010236881A CN113464712A CN 113464712 A CN113464712 A CN 113464712A CN 202010236881 A CN202010236881 A CN 202010236881A CN 113464712 A CN113464712 A CN 113464712A
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CN
China
Prior art keywords
valve
sealing
assembly
rod
sealing element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010236881.2A
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Chinese (zh)
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Sanhua Research Institute Co Ltd
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Hangzhou Sanhua Research Institute Co Ltd
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Filing date
Publication date
Application filed by Hangzhou Sanhua Research Institute Co Ltd filed Critical Hangzhou Sanhua Research Institute Co Ltd
Priority to CN202010236881.2A priority Critical patent/CN113464712A/en
Publication of CN113464712A publication Critical patent/CN113464712A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/003—Spindle sealings by fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
    • F16K41/043—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing for spindles which only rotate, i.e. non-rising spindles
    • F16K41/046—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing for spindles which only rotate, i.e. non-rising spindles for rotating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/06—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing
    • F16K41/063—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing for spindles which only rotate, i.e. non-rising spindles
    • F16K41/066—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing for spindles which only rotate, i.e. non-rising spindles for rotating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0694—Spindle sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/22—Features relating to lubrication
    • F16K5/227—Features relating to lubrication for plugs with spherical surfaces

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

An electrically operated valve and its preparation method, including valve stem and dynamic seal assembly, the dynamic seal assembly is set up on valve stem, the dynamic seal assembly includes the first seal and second seal, form the cavity between valve stem and the dynamic seal assembly, the cavity is packed with the sealing oil, through setting up the first seal, second seal and multilayer sealing of the sealing oil, help to limit the fluid located in cavity of valve body to leak outwards along axial of the valve stem; in addition, through setting up sealed oil can improve the valve rod respectively with first sealing member, the lubrication when the relative rotation between the second sealing member, be favorable to reducing the friction loss.

Description

Electrically operated valve and method for manufacturing the same
[ technical field ] A method for producing a semiconductor device
The invention relates to an electric valve and a manufacturing method thereof.
[ background of the invention ]
The electric valve is generally used for switching on and off or switching fluid in a system pipeline, and comprises a control device, a valve rod, a valve body assembly and a valve core, wherein the valve core is positioned in an inner cavity formed by the valve body assembly, and the control device drives the valve core to rotate by rotating the valve rod, so that the function of switching on and off the fluid or switching the fluid is achieved. In the process of operating the electric valve, fluid may leak outwards along the axial direction of the valve rod, and particularly when high-pressure fluid is involved, how to limit the axial leakage of the fluid is a technical problem.
[ summary of the invention ]
The invention aims to provide an electric valve and a manufacturing method thereof, which are beneficial to limiting the outward leakage of fluid along the axial direction of a valve rod.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an electrically operated valve, includes valve body subassembly, valve rod and dynamic seal subassembly, the valve body subassembly includes the valve body chamber, part dynamic seal subassembly is located the valve body chamber, part the valve rod is located the valve body chamber, dynamic seal subassembly includes shaft seal seat, piston, first sealing member, second sealing member and third sealing member, dynamic seal subassembly is including well cavity, the piston is located well cavity, first sealing member compress tightly in the valve rod with between the shaft seal seat, the second sealing member compress tightly in the valve rod with between the piston, the third sealing member compress tightly in the piston with between the shaft seal seat, dynamic seal subassembly with be formed with the cavity between the valve rod, the cavity packing has sealing oil.
A manufacturing method of an electric valve, the electric valve comprises a control device, a valve body assembly, a valve rod, a valve core ball and a dynamic sealing assembly, the valve body assembly comprises a valve body and a sealing cover, and the manufacturing method of the electric valve comprises the following steps:
s1: assembling the valve rod and the dynamic seal assembly into a whole;
s2: fixedly connecting the dynamic seal assembly provided with the valve rod with the valve body, wherein the valve core ball is positioned in an inner cavity formed by the valve body and is in transmission connection with the valve rod;
s3: fixedly connecting the sealing cover with the valve body;
s4: and positioning the control device and the dynamic seal assembly, wherein the valve rod is in transmission connection with the control device, and the control device is fixedly connected with the valve body.
The invention provides an electric valve and a manufacturing method thereof, the electric valve comprises a valve rod and a dynamic sealing assembly, the dynamic sealing assembly is arranged on the valve rod and comprises a first sealing element and a second sealing element, a cavity is formed between the dynamic sealing assembly and the valve rod, sealing oil is filled in the cavity, and the first sealing element, the second sealing element and the multilayer sealing of the sealing oil are arranged, so that the outward leakage of fluid in the cavity of a valve body along the axial direction of the valve rod is favorably limited; in addition, through setting up sealed oil can improve the valve rod respectively with first sealing member, the lubrication when the relative rotation between the second sealing member, be favorable to reducing the friction loss.
[ description of the drawings ]
Figure 1 is a schematic cross-sectional view of a first embodiment of an electrically operated valve;
FIG. 2 is a schematic perspective view of the valve body of FIG. 1;
FIG. 3 is a cross-sectional structural view of the valve body of FIG. 1;
FIG. 4 is a cross-sectional structural schematic view of the dynamic seal assembly and valve stem of FIG. 1;
FIG. 5 is a schematic cross-sectional view of the shaft seal holder of FIG. 4;
FIG. 6 is a schematic cross-sectional view of the piston of FIG. 4;
FIG. 7 is a perspective view of the stop block of FIG. 4;
FIG. 8 is a schematic perspective view of the retainer ring of FIG. 4;
FIG. 9 is a schematic perspective view of the valve stem of FIG. 4;
FIG. 10 is a schematic perspective view of the dynamic seal assembly and valve stem of FIG. 1;
FIG. 11 is a schematic perspective view of the lower housing of the control device of FIG. 1;
figure 12 is a schematic perspective view of a first embodiment of the electrically operated valve;
FIG. 13 is a schematic cross-sectional view of the closure of FIG. 1;
figure 14 is a cross-sectional view of a second embodiment of the electrically operated valve;
FIG. 15 is a cross-sectional view of the shaft seal holder of FIG. 14;
figure 16 is a schematic view of a part of the assembly process of the electric valve;
figure 17 is a second schematic view of a part of the assembly process of the electric valve;
FIG. 18 is a first schematic view of the assembly process of the dynamic seal assembly and the valve stem;
FIG. 19 is a second schematic view of the assembly process of the dynamic seal assembly and the valve stem.
[ detailed description ] embodiments
The invention will be further described with reference to the following figures and specific examples:
referring to fig. 1, the electric valve can be applied to an automobile air conditioning system, the electric valve 100 includes a control device 1, a valve core ball 2, a valve body assembly 3 and a valve rod 4, the valve core ball 2 is located in a valve body cavity formed by the valve body assembly 3, one end of the valve rod 4 is in transmission connection with the control device 1, the other end of the valve rod 4 is in transmission connection with the valve core ball 2, the control device 1 outputs a rotation torque to the valve rod 4, and the valve rod 4 drives the valve core ball 2 to rotate.
Referring to fig. 1, the valve body assembly 3 includes a valve body 31, a cover 32, and a valve cartridge seat 33. Referring to fig. 2 and 3, the valve body 31 includes a first mounting portion 311, a second mounting portion 312, and a first passage 313, the first mounting portion 311 forms a first mounting cavity 314, the second mounting portion 312 forms a second mounting cavity 315, an opening of the first mounting cavity 314 is located on one side of the valve body 31, an opening of the second mounting cavity 315 is located on the other side of the valve body 31, and an opening of the first passage 313 is located on the other side of the valve body 31, where the three sides are different sides of the valve body 31, which is beneficial to avoiding interference, improving the utilization rate of the valve body 31, and facilitating miniaturization. Referring to fig. 1, a part of the cover 32 is located in the second mounting cavity 315, the cover 32 is fixedly connected to the valve body 31 through screws, and further, a sealing arrangement may be provided between the cover 32 and the valve body 31, which is beneficial to prevent fluid from leaking out from between the cover 32 and the valve body 31; the sealing cover 32 and the valve body 31 are assembled to form a valve body cavity 316, the valve core ball 2 is positioned in the valve body cavity 316, the valve core seat 33 is positioned at two sides of the valve core ball 2, the valve core seat 33 is provided with an arc-shaped matching surface matched with the outer surface of the valve core ball 2, at least part of the valve core seat 33 is attached to the valve core ball 2, the valve core seat 33 is in sliding fit with the valve core ball 2, and the valve core seat 33 is arranged for supporting the valve core ball 2, so that a gap is reserved between the valve core ball 2 and the bottom end of the valve body cavity 316, and friction loss between the valve core ball 2 and the valve body 31 during rotation is reduced, furthermore, the valve core seat 33 and the sealing cover 32, the valve core seat 33 and the valve body 31 can be arranged in a sealing manner, internal leakage is reduced, and control accuracy is improved; the valve core ball 2 comprises a hole passage 21, the sealing cover 32 comprises a second channel 321, the hole passage 21 is arranged through the valve core ball 2, and the hole passage 21 of the valve core ball 2 can be communicated or not communicated with the first channel 313 and the second channel 321 by rotating the valve core ball 2, so that the on-off of the fluid is controlled.
Referring to fig. 1 and 4, the electric valve 100 further includes a dynamic seal assembly 6, the dynamic seal assembly 6 is used for limiting the outward leakage of the fluid along the axial direction of the valve rod 4, and the dynamic seal assembly 6 includes a shaft seal seat 61, a piston 62, a limiting frame 63, a retainer ring 64, a first seal 65, a second seal 66 and a third seal 67; a chamber 68 is formed between the piston 62, the valve stem 4 and the shaft seal seat 61.
Referring to fig. 5, the shaft seal seat 61 includes a first flange portion 611 and a main body portion 612, the first flange portion 611 is integrally formed with the main body portion 612, the main body portion 612 is disposed in a cantilever structure with respect to the first flange portion 611, the main body portion 612 includes a free end portion 6121, and the main body portion 612 surrounds and forms a hollow cavity 613; the first flange portion 611 includes a limiting column 6111 and a first through hole 6112, the limiting column 6111 is disposed in a protruding manner along the axial direction of the shaft seal seat 61, the first through hole 6112 is disposed in communication with the hollow cavity 613, a first sealing groove 6113 is disposed on a circumferential wall surrounding the first through hole 6112, and the first sealing groove 6113 is formed in a manner of being recessed inward from the circumferential wall along the radial direction.
Referring to fig. 6, the piston 62 includes an upper end 621, a lower end 622, and a second through hole 623, and in conjunction with fig. 1, an end of the piston 62 close to the spool ball 2 is defined as the lower end 622, and an end far away from the spool ball 2 is defined as the upper end 621; the lower end 622 is also provided with a downwardly convex projection 6221; the second through hole 623 penetrates through the piston 62, a second sealing groove 624 is arranged on a circumferential wall surrounding the second through hole 623, and the second sealing groove 624 is formed by inwards recessing from the circumferential wall; in addition, a third seal groove 625 formed to be depressed inward is provided on the outer peripheral wall of the piston 62.
Referring to fig. 7, the limiting frame 63 includes a matching portion 631, a stopping portion 632, and a third through hole 633, the third through hole 633 is disposed through the limiting frame 63, the matching portion 631 is configured to be in transmission connection with the control device 1, in this embodiment, the matching portion 631 is disposed in a star-shaped structure, the star-shaped structure is favorable for limiting the slip between the control device 1 and the matching portion 631, and as another embodiment, the matching portion 631 may also be in another shape structure with a limiting function; the stopping portion 632 includes a non-stopping segment 6321 and a stopping segment 6322, and the stopping portion 632 is stopped by the stopping segment 6322 and the stopping column 6111 of the shaft seal seat 61.
Referring to fig. 8, the retainer ring 64 includes a fourth through hole 641 and sector holes 642, the fourth through hole 641 and the sector holes 642 respectively penetrate through the retainer ring 64, the sector holes 642 are symmetrically distributed on two sides of the fourth through hole 641, and the number of the sector holes 642 is two in this embodiment.
Referring to fig. 9, the valve rod 4 includes a first rod portion 41, a second rod portion 42, a connecting portion 43 and a second flange portion 44, the valve rod 4 is a single piece, the connecting portion 43 is located on one side of the second flange portion 44, the first rod portion 41 and the second rod portion 42 are located on the other side of the second flange portion 44, the first rod portion 41 is integrally connected with the second flange portion 44 through the second rod portion 42, or the second rod portion 42 is closer to the second flange portion 44 than the first rod portion 41, the radial dimension of the first rod portion 42 is smaller than that of the second rod portion 42, and the radial dimension of the first rod portion 42 is smaller than that of the second rod portion 42, so as to facilitate the filling of sealing oil during the assembly process of the dynamic seal assembly.
Referring to fig. 4, the piston 62 is located in the hollow cavity 613 formed by the shaft seal seat 61, a gap is left between the upper end 621 of the piston 62 and the bottom of the hollow cavity 613, the valve rod 4 sequentially passes through the second through hole 623 of the piston 62 and the first through hole 6112 of the shaft seal seat 61, a part of the second rod part 42 is located in the first through hole 6112, and a part of the second rod part 42 is located in the second through hole 623; the retainer ring 64 is sleeved on the radial outer periphery of the valve rod 4 through the fourth through hole 641, specifically, the retainer ring 64 is sleeved on the radial outer periphery of the second rod portion 42, the retainer ring 64 is located between the piston 62 and the second flange portion 44, one end of the retainer ring 64 abuts against the second flange portion 44, and the other end of the retainer ring 64 abuts against the free end portion 6121 and the bulge portion 6221 respectively, so as to limit the piston 62 and the shaft seal seat 61 from moving towards the connecting portion 43 of the valve rod; a part of the first seal 65 is positioned in a first groove formed by the first seal groove 6113, the inner circumferential side of the first seal 65 protrudes out of the first seal groove 6113, the outer circumferential side of the first seal 65 abuts against the first seal groove 6113, the inner circumferential side of the first seal 65 abuts against the outer circumferential wall of the second rod part 42, and the first seal 65 is in a sealing and pressing state; a part of the second seal 66 is positioned in a second groove formed by the second seal groove 624, the outer peripheral side of the second seal 66 abuts against the second seal groove 624, the inner peripheral side of the second seal 66 abuts against the outer peripheral wall of the second stem portion 42, and the second seal 66 is in a seal-pressed state; a part of the third seal 67 is positioned in a third groove cavity formed by the third seal groove 625, the inner circumferential side of the third seal 67 abuts against the third seal groove 625, the outer circumferential side of the third seal 67 abuts against the inner circumferential wall of the body portion 612, and the third seal 67 is in a sealed and pressed state; in this way, a sealed chamber 68 is formed between the piston 62, the valve rod 4 and the shaft seal seat 61 under the action of the sealing element, and the chamber 68 is used for filling sealing oil, in this embodiment, the sealing oil is refrigeration oil, but as other embodiments, the sealing oil may also be other sealing media; it should be noted that the choice of sealing oil needs to be matched to the fluid medium flowing through the electric valve 100, so that contamination of the fluid medium by the sealing oil can be avoided. Referring to fig. 4, the limiting frame 63 is sleeved on the radial periphery of the valve rod 4 through a third through hole 633, specifically, the limiting frame 63 is sleeved on the radial periphery of the first rod 41, the third through hole 633 is in interference fit with the first rod 41, that is, the limiting frame 63 is fixedly connected with the valve rod 4 through the first rod 41, a gap is left between the lower end surface of the limiting frame 63 and the upper end surface of the shaft seal seat 61, and the gap is set to be beneficial to reducing the friction loss when the limiting frame 63 and the shaft seal seat 61 rotate relatively; referring to fig. 10, in the relative rotation process of the limiting frame 63 and the shaft seal seat 61, the stopping portion 632 of the limiting frame 63 can abut against the limiting post 6111 of the shaft seal seat 61, specifically, the stopping section 6322 of the stopping portion 632 can abut against the limiting post 6111, so as to limit the rotation angle of the limiting frame 63, and further limit the rotation angle of the valve rod 4.
Referring to fig. 1, the part of the dynamic seal assembly 6 equipped with the valve rod 4 is located in the valve body cavity 316, the connecting part 43 of the valve rod 4 is in transmission connection with the valve core ball 2, the valve rod 4 is in transmission connection with the control device 1 through the limiting frame 63, specifically, the first rod part 41 of the valve rod 4 is in interference fit with the limiting frame 63, and the limiting frame 63 is in transmission connection with the control device 1 through the matching part 631, so that the valve rod 4 is in transmission connection with the control device 1; the lower end surface of the first flange portion 611 of the shaft seal holder 61 abuts on the opening side of the first mounting cavity 314 of the valve body 31; the shaft seal seat 61 is fixedly connected with the valve body 31, specifically, referring to fig. 2, the opening side of the first mounting cavity 314 of the valve body 31 is provided with a first threaded hole 317, the first threaded hole 317 is arranged close to the opening position of the first mounting cavity 314, in this embodiment, the number of the first threaded holes 317 is four, correspondingly, referring to fig. 10, a first flange portion 611 of the shaft seal seat 61 is provided with a positioning hole 614 and a circular hole 615, the positioning hole 614 and the circular hole 615 are arranged through the first flange portion 611, the positioning hole 614 is used for being matched and positioned with the control device 1, and the circular hole 615 is used for realizing the fixed connection of the shaft seal seat 61 with the valve body 31; the number of the round holes 615 is the same as that of the first threaded holes 317, in the assembling process, the round holes 615 and the first threaded holes 317 are arranged in an aligned mode, and screws penetrate through the round holes 615 to be in threaded connection with the first threaded holes 317, so that the shaft seal seat 61 is fixedly connected with the valve body 31; further, a sealing arrangement is further provided between the shaft seal seat 61 and the valve body 31, specifically, referring to fig. 2, the first mounting portion 311 further includes a first step portion 3111, referring to fig. 1, the dynamic seal assembly 6 further includes a fourth sealing member 69, the fourth sealing member 69 is located between the first step portion 3111 and the first flange portion 611, the fourth sealing member 69 is in a sealing and pressing state, and the fourth sealing ring 69 is provided, so that the sealing between the shaft seal seat 61 and the valve body 31 is enhanced, and the fluid is prevented from leaking out from between the shaft seal seat 61 and the valve body 31.
The control device 1 is fixedly connected with the valve body 31, specifically, referring to fig. 11, the control device 1 includes a lower housing, the lower housing is integrally injection-molded, the lower housing includes a positioning column 11, a fixing seat 12 and a connecting seat 13, the connecting seat 13 is located at the bottom of the lower housing, the fixing seat 12 is located at the bottom of the lower housing and protrudes out of the edge of the lower housing, the fixing seat 12 is provided with a first connecting hole 121 penetrating through, the connecting seat 13 is provided with a second threaded hole 131, in this embodiment, the number of the fixing seats 12 is two, and the number of the connecting seats 13 is also two; accordingly, referring to fig. 2, the open side of the first mounting cavity 314 of the valve body 31 is further provided with second and third connection holes 318 and 319, which are penetrated, and the number of the second and third connection holes 318 and 319 is two, respectively. When the control device 1 is fixedly connected with the valve body 31, referring to fig. 1 and 12, the positioning column 11 of the control device 1 is located in the positioning hole 614 of the shaft seal seat 61 to position the control device 1; the second connecting hole 318 of the valve body 31 is aligned with the second threaded hole 131 of the connecting seat 13, and a screw passes through the second connecting hole 318 from bottom to top along the axial direction of the electric valve 100 to be in threaded connection with the second threaded hole 131; the third threaded hole 319 of the valve body 31 is aligned with the first connection hole 121 of the fixing seat 12, and a screw passes through the first connection hole 121 from top to bottom along the axial direction of the electric valve 100 to be in threaded connection with the third threaded hole 319; such connected mode sets up four convex fixing bases in bottom edge in comparison with the shell body, is favorable to reducing the radial volume of shell body, and then is favorable to reducing controlling means 1's radial volume.
The cover 32 is fixedly connected with the valve body 31 by screws, specifically, referring to fig. 2, the opening side of the second mounting cavity 315 of the valve body 31 is provided with fourth threaded holes 310, in the present embodiment, the number of the fourth threaded holes 310 is three, and the fourth threaded holes 310 are distributed in a substantially triangular shape; correspondingly, referring to fig. 12 and 13, the sealing cover 32 is provided with counter bores 322 matched with the fourth threaded holes 310, the counter bores 322 are arranged through the sealing cover 32, the number of the counter bores 322 is three, and the counter bores 322 are also distributed in a roughly triangular shape; the closure 32 further comprises a second step 323; referring to fig. 1, the partial cover 32 is located in the second mounting cavity 315, the second stepped portion 323 abuts against the open side of the second mounting cavity 315 of the valve body 31, the counter bore 322 is aligned with the fourth threaded hole 310, a screw passes through the counter bore 322 and is in threaded connection with the fourth threaded hole 310, and a screw head is located in the counter bore 322 to avoid interference during assembly of the electric valve; the setting is the connected mode that triangular distribution, compares in the conventional connected mode that is the rectangular distribution, under the prerequisite of guaranteeing connection stability, is favorable to reducing the connection cost of closing cap 32 and valve body 31.
Referring to fig. 1, the control device 1 outputs torque to drive the limiting frame 63 to rotate, the limiting frame 63 is in interference fit with the valve rod 4, namely the limiting frame 63 drives the valve rod 4 to rotate, the connecting portion 43 of the valve rod 4 is in transmission connection with the valve core ball 2, the valve core ball 2 is driven to rotate by the rotation of the valve rod 4, and the pore passage 21 of the valve core ball 2 can be communicated or not communicated with the first channel 313 and the second channel 321 by rotating the valve core ball 2, so that the on-off of fluid is controlled. Fluid, particularly high pressure fluid, flowing through the spool ball 2 may enter the valve body cavity 316 through the sliding fit clearance of the spool ball 2 and the spool seat 33 and may further leak outward in the axial direction of the valve stem 4; providing the dynamic seal assembly 6, the fluid in the valve body chamber 316 will enter the hollow cavity 613 through the sector holes 642 of the retainer ring 64 and act on the lower end 622 of the piston 62 and/or the convex portion 6221, the piston 62 may move upward along the axial direction of the valve rod 4 under the action of the fluid pressure, the movement of the piston 62 will compress the sealing oil in the sealing chamber 68, and the pressure of the sealing oil is gradually balanced with the pressure of the fluid under the action of the sealing member; since the second seal 66 and the third seal 67 are located between the seal oil and the fluid with balanced pressure, when the pressure of the seal oil is balanced with the pressure of the fluid, that is, the second seal 66 and the third seal 67 are less affected by the pressure of the fluid and/or the seal oil, it is advantageous to improve the sealing performance of the second seal 66 and the third seal 67. The second seal 66 and the third seal 67 are mainly used for isolating seal oil and fluid; the first sealing element 65 is mainly used for isolating sealing oil from the external environment, and is beneficial to preventing the sealing oil from leaking outwards between the valve rod 4 and the shaft seal seat 61; the fourth seal 69 is used to isolate the fluid from the environment and to help prevent fluid from leaking out between the shaft seal seat 61 and the valve body 31. By providing the first seal 65, the second seal 66, the third seal 67, the fourth seal 69, and the multiple seals of the seal oil, it is advantageous to prevent the fluid located in the valve body chamber 316 from leaking outward in the axial direction of the valve stem 4. On the other hand, with the frequent rotation of valve rod 4, there is the sliding friction loss of relative motion between valve rod 4 and first sealing member 65, second sealing member 66 respectively, sets up sealed oil and can improve the lubrication of relative motion between valve rod 4 and first sealing member 65, second sealing member 66, is favorable to reducing the friction loss.
Referring to fig. 14, a second embodiment of the electric valve 100 mainly differs from the first embodiment in that: in the second embodiment, referring to fig. 15, a fourth sealing groove 6114 is further provided on the outer peripheral wall of the first flange portion 611 of the shaft seal holder 61, and the fourth sealing groove 6114 is formed to be recessed inward in the radial direction of the first flange portion 611; referring to fig. 14, the dynamic seal assembly 6 further includes a fifth sealing element 60, when the dynamic seal assembly 6 is assembled with the control device 1, an inner peripheral side of the fifth sealing element 60 abuts against the fourth sealing groove 6114, an outer peripheral side of the fifth sealing element 60 abuts against the lower housing of the control device 1, the fifth sealing element 60 is in a sealing and pressing state, and the fifth sealing element 60 is provided to prevent moisture in the external environment from entering the control device 1, so as to reduce the risk of failure or corrosion of the circuit board of the control device 1 due to contact with moisture in the external environment.
Referring to fig. 16 and 17, the method of manufacturing the electric valve 100 will be further explained, and the method of manufacturing the electric valve 100 includes the following steps:
s1: assembling the valve rod 4 and the dynamic seal assembly 6 into a whole;
s2: fixedly connecting a dynamic seal assembly 6 provided with a valve rod 4 with a valve body 31, wherein a valve core ball 2 is positioned in an inner cavity formed by the valve body 31, and the valve core ball 2 is in transmission connection with the valve rod 4;
s3: the sealing cover 32 is fixedly connected with the valve body 31;
s4: the control device 1 is matched with the dynamic seal assembly 6 in a positioning mode, and the control device 1 is fixedly connected with the valve body 31.
Referring to fig. 18 and 19, step S1 specifically includes:
a: placing part of the first sealing element 65 in a first groove cavity formed by a first sealing groove 6113 of the shaft sealing seat 61 to form a shaft sealing seat assembly;
b: placing a portion of the second seal 66 in a second cavity formed by the second seal groove 624 of the piston 62; placing a portion of the third seal 67 in the third groove cavity formed by the third seal groove 625 of the piston 62 to form a piston assembly;
c: the retainer ring 64 is sleeved on the radial outer periphery of the second rod part 42 of the valve rod 4, the retainer ring 64 is abutted against the second flange part 44 of the valve rod 4, the piston assembly is sleeved on the radial outer periphery of the second rod part 42 of the valve rod 4, and the boss 6221 of the piston 62 is abutted against the retainer ring 64;
d: c, assembling the first assembly formed in the step c and the shaft seal seat assembly, so that part of the first rod part 41 of the valve rod 4 is placed in the first through hole 6112 of the shaft seal seat 61, and positioning by means of a tool to keep the relative position of the valve rod 4 and the shaft seal seat 61; pushing the piston assembly and the retainer ring 64 to enable the piston assembly to be located in the hollow cavity 613 formed by the shaft seal seat 61, wherein the retainer ring 64 is abutted against the free end portion 6121 of the main body portion 612 of the shaft seal seat 61 and the convex portion 6221 of the piston 62 respectively;
e: through the gap between the first rod part 41 and the first through hole 6112, the sealing oil is injected into the chamber 68 formed by the piston assembly, the shaft seal seat assembly and the valve rod 4;
f: the valve rod 4 is pushed upwards, the second rod part 42 of the valve rod 4 is placed in the first through hole 6112, the second flange part 44 of the valve rod 4 is abutted against the retainer ring 64, and in the process of pushing the valve rod 4, the tool passes through the fan-shaped hole 642 of the retainer ring 64 and hooks the inner groove of the boss 6221 by virtue of the tool, so that the piston assembly is not driven to move upwards in the process of pushing the valve rod 4;
g: the limiting frame 63 is pressed into the first rod part 41 of the valve rod 4 in an interference manner, so that one end of the limiting frame 63 is flush with the free end of the first rod part 41, and a gap is reserved between the other end of the limiting frame 63 and the upper end face of the shaft seal seat 61.
Step S2 specifically includes: placing the dynamic seal assembly 6 equipped with the valve rod 4 in the first mounting cavity 314 of the valve body 31, enabling the first flange part 611 of the shaft seal seat 61 to be abutted against the opening side of the first mounting cavity 314 of the valve body 31, and fixedly connecting the shaft seal seat 61 and the valve body 31 through screws; the valve core ball 2 is placed in an inner cavity formed by the valve body 31, and the valve core ball 2 is in transmission connection with the connecting part 43 of the valve rod 4.
Step S3 specifically includes: a part of the cap 32 is placed in the second mounting chamber 315 of the valve body 31, the second stepped portion 323 of the cap 32 is brought into contact with the opening side of the second mounting chamber 315 of the valve body 31, and the cap 32 and the valve body 31 are fixedly connected by screws.
Step S4 specifically includes: the positioning column 11 of the control device 1 is matched and positioned with the limiting hole 614 on the shaft seal seat 61, the valve rod 4 is in transmission connection with the control device 1 through the limiting frame 63, and the control device 1 is fixedly connected with the valve body 31 through screws.
It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will understand that modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and all such modifications and improvements are intended to be included within the scope of the following claims.

Claims (8)

1. An electrically operated valve comprising a valve body assembly, a valve stem and a dynamic seal assembly, said valve body assembly comprising a valve body cavity, part of said dynamic seal assembly being located in said valve body cavity and part of said valve stem being located in said valve body cavity, wherein: the dynamic seal assembly comprises a shaft seal seat, a piston, a first sealing element, a second sealing element and a third sealing element, the dynamic seal assembly comprises a hollow cavity, the piston is located in the hollow cavity, the first sealing element is compressed between the valve rod and the shaft seal seat, the second sealing element is compressed between the valve rod and the piston, the third sealing element is compressed between the piston and the shaft seal seat, a cavity is formed between the dynamic seal assembly and the valve rod, and sealing oil is filled in the cavity.
2. Electrically operated valve according to claim 1, characterized in that: the shaft seal seat comprises a first through hole, the piston comprises a second through hole, a first sealing groove is arranged on a circumferential wall forming the first through hole in a surrounding mode, a second sealing groove is arranged on the circumferential wall forming the second through hole in a surrounding mode, a third sealing groove is arranged on the circumferential wall of the piston, part of the valve rod is located in the first through hole, one part of the first sealing element is located in a first groove cavity formed by the first sealing groove, the first sealing element is tightly pressed between the first sealing groove and the valve rod, part of the valve rod is located in the second through hole, one part of the second sealing element is located in a second groove cavity formed by the second sealing groove, the second sealing element is tightly pressed between the second sealing groove and the valve rod, and one part of the third sealing element is located in a third groove cavity formed by the third sealing groove, the third sealing element is pressed between the third sealing groove and the shaft sealing seat.
3. Electrically operated valve according to claim 2, characterized in that: the dynamic seal assembly further comprises a limiting frame, the limiting frame comprises a stop part, the shaft seal seat further comprises a limiting column, the limiting column is arranged along the axial protrusion of the shaft seal seat, the limiting frame is fixedly connected with the valve rod, and the stop part and the limiting column can be abutted and matched to limit the rotating angle of the valve rod.
4. An electrically operated valve according to claim 3, characterised in that: the valve rod comprises a first rod part and a second rod part, part of the second rod part is located in the first through hole, part of the second rod part is located in the second through hole, the first sealing element is tightly pressed between the second rod part and the first sealing groove, the second sealing element is tightly pressed between the second rod part and the second sealing groove, the first rod part is higher than the valve body cavity, the first rod part is fixedly connected with the limiting frame, and the limiting frame is in transmission connection with a control device of the electric valve.
5. Electrically operated valve according to any of claims 1-4, characterized in that: the dynamic seal assembly further comprises a fourth sealing element, the valve body assembly comprises a first mounting portion, the first mounting portion comprises a first step portion, the shaft seal seat comprises a first flange portion and a main body portion, the main body portion is arranged in a cantilever structure mode relative to the first flange portion, the fourth sealing element is sleeved on the periphery of the main body portion, at least part of the main body portion is located in the valve body cavity, the shaft seal seat is fixedly connected with the valve body assembly, and the fourth sealing element is tightly pressed between the first flange portion and the first step portion.
6. Electrically operated valve according to claim 5, characterized in that: the electric valve further comprises a control device, the dynamic sealing assembly further comprises a fifth sealing element, a fourth sealing groove is formed in the peripheral wall of the first flange portion, the control device is fixedly connected with the valve body assembly, one part of the fifth sealing element is located in a fourth groove cavity formed by the fourth sealing groove, and the fifth sealing element is tightly pressed between the fourth sealing groove and the control device.
7. A manufacturing method of an electric valve, the electric valve comprises a control device, a valve body assembly, a valve rod, a valve core ball and a dynamic sealing assembly, the valve body assembly comprises a valve body and a sealing cover, and the manufacturing method of the electric valve comprises the following steps:
s1: assembling the valve rod and the dynamic seal assembly into a whole;
s2: fixedly connecting the dynamic seal assembly provided with the valve rod with the valve body, wherein the valve core ball is positioned in an inner cavity formed by the valve body and is in transmission connection with the valve rod;
s3: fixedly connecting the sealing cover with the valve body;
s4: and positioning the control device and the dynamic seal assembly, wherein the valve rod is in transmission connection with the control device, and the control device is fixedly connected with the valve body.
8. The manufacturing method according to claim 7, characterized in that: the dynamic seal assembly comprises a shaft seal seat, a piston, a retainer ring, a limiting frame, a first sealing element, a second sealing element, a third sealing element and sealing oil, and the step S1 specifically comprises the following steps:
a: placing part of the first sealing element in a first groove cavity of the shaft sealing seat to form a shaft sealing seat assembly;
b: placing a portion of the second seal in a second groove of the piston and a portion of the third seal in a third groove of the piston to form a piston assembly;
c: sleeving the stop ring on the radial periphery of the second rod part of the valve rod, wherein the stop ring is abutted against the second flange part of the valve rod, the piston assembly is sleeved on the radial periphery of the second rod part, and the piston is abutted against the stop ring to form a first assembly;
d: assembling the first assembly with the shaft seal seat assembly to enable part of the first rod part of the valve rod to be arranged in the first through hole of the shaft seal seat; pushing the piston assembly and the check ring to enable the piston assembly to be arranged in a hollow cavity formed by the shaft seal seat, and enabling the check ring to be respectively abutted against the shaft seal seat and the piston;
e: injecting sealing oil into a chamber formed by the piston assembly, the valve rod and the shaft seal seat through a cavity between the first rod part and the first through hole;
f: pushing the valve rod upwards to enable the second rod part to be arranged in the first through hole, enabling the second flange part to be abutted against the check ring, and not driving the piston assembly to move in the process of pushing the valve rod;
g: and pressing the limiting frame into the first rod part in an interference manner, so that a gap is reserved between the limiting frame and the shaft seal seat.
CN202010236881.2A 2020-03-30 2020-03-30 Electrically operated valve and method for manufacturing the same Pending CN113464712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010236881.2A CN113464712A (en) 2020-03-30 2020-03-30 Electrically operated valve and method for manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010236881.2A CN113464712A (en) 2020-03-30 2020-03-30 Electrically operated valve and method for manufacturing the same

Publications (1)

Publication Number Publication Date
CN113464712A true CN113464712A (en) 2021-10-01

Family

ID=77864918

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010236881.2A Pending CN113464712A (en) 2020-03-30 2020-03-30 Electrically operated valve and method for manufacturing the same

Country Status (1)

Country Link
CN (1) CN113464712A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023143060A1 (en) * 2022-01-27 2023-08-03 浙江三花汽车零部件有限公司 Electric valve and manufacturing method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023143060A1 (en) * 2022-01-27 2023-08-03 浙江三花汽车零部件有限公司 Electric valve and manufacturing method therefor

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