CN111750127B - Electric valve - Google Patents

Electric valve Download PDF

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Publication number
CN111750127B
CN111750127B CN201910243153.1A CN201910243153A CN111750127B CN 111750127 B CN111750127 B CN 111750127B CN 201910243153 A CN201910243153 A CN 201910243153A CN 111750127 B CN111750127 B CN 111750127B
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CN
China
Prior art keywords
assembly
gear
wheel assembly
mounting plate
planet
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CN201910243153.1A
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Chinese (zh)
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CN111750127A (en
Inventor
不公告发明人
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Hangzhou Sanhua Research Institute Co Ltd
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Hangzhou Sanhua Research Institute Co Ltd
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Priority to CN201910243153.1A priority Critical patent/CN111750127B/en
Publication of CN111750127A publication Critical patent/CN111750127A/en
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Publication of CN111750127B publication Critical patent/CN111750127B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00Plug 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
    • F16K5/06Plug 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/53Mechanical actuating means with toothed gearing
    • F16K31/535Mechanical actuating means with toothed gearing for rotating valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025Electrical or magnetic means
    • F16K37/0041Electrical or magnetic means for measuring valve parameters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00Plug 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
    • F16K5/06Plug 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
    • F16K5/0647Spindles or actuating means

Abstract

The invention discloses an electric valve, which comprises a driving mechanism, a transmission assembly, a valve body assembly and a valve core, wherein the driving mechanism comprises a rotor assembly, a sleeve and a connecting seat, one end of an opening of the sleeve is fixedly connected with the connecting seat and is provided with a sleeve cavity, the rotor assembly is accommodated in the sleeve cavity, the transmission assembly comprises a first transmission mechanism, the first transmission mechanism comprises a sun wheel assembly, a fixed gear ring and at least one planet wheel assembly, the at least one planet wheel assembly comprises an output-stage planet wheel assembly, the sun wheel assembly is fixed with the rotor assembly, the fixed gear ring is fixed with the connecting seat, and the fixed gear ring is at least partially positioned in the rotor assembly; the output-stage planetary gear assembly comprises a planetary gear, a first mounting plate and a second mounting plate, the planetary gear is arranged between the first mounting plate and the second mounting plate, and the first mounting plate can directly or indirectly drive the valve core to act. The space in the rotor assembly is fully utilized, and part of the structure of the transmission assembly can be relatively compact, so that the volume of the electric valve is relatively small.

Description

Electric valve
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of fluid control, in particular to an electric valve.
[ background of the invention ]
The electric valve is generally used for switching or switching on and off fluid, and the existing electric valve generally comprises a driving mechanism, a transmission assembly, a valve body part and the like, wherein the driving mechanism drives a valve core in a valve body to rotate through the transmission assembly so as to achieve fluid switching or switching on and off. Wherein the transmission assembly is provided with a dead axle gear reduction mechanism, wherein the output torque of the motor is amplified by a dead axle gear set. However, the dead axle gear set occupies a large space, so that the volume of the electric valve is also large.
[ summary of the invention ]
The invention provides an electric valve for solving the defects of the electric valve, which comprises a driving mechanism, a transmission assembly, a valve body assembly and a valve core, wherein the driving mechanism comprises a rotor assembly, a sleeve and a connecting seat, one end of an opening of the sleeve is fixedly connected with the connecting seat and is provided with a sleeve cavity, the rotor assembly is accommodated in the sleeve cavity, the transmission assembly comprises a first transmission mechanism, the first transmission mechanism comprises a sun wheel assembly, a fixed gear ring and at least one planet wheel assembly, the at least one planet wheel assembly comprises an output-stage planet wheel assembly, the sun wheel assembly is fixed with the rotor assembly, the fixed gear ring is fixed with the connecting seat, and the fixed gear ring is at least partially positioned in the rotor assembly;
the output-stage planetary gear assembly comprises a planetary gear, a first mounting plate and a second mounting plate, the planetary gear is arranged between the first mounting plate and the second mounting plate, and the first mounting plate can directly or indirectly drive the valve core to act.
The quantity of planet wheel subassembly is two, still includes first planet wheel subassembly, first planet wheel subassembly includes planet wheel, first mounting panel and second mounting panel, first planet wheel subassembly first mounting panel includes disc portion and column gear, the one end of column gear is in near the center or the center of disc portion, column gear with disc portion fixed connection, perhaps the column gear with disc portion structure as an organic whole, fixed ring gear with the planet wheel meshing is connected, first planet wheel group the column gear with the planet wheel meshing of output level planet wheel subassembly is connected, actuating mechanism's rotor subassembly passes through sun gear subassembly first planet wheel subassembly the planet wheel of output level planet wheel subassembly drives the first mounting panel of output level planet wheel subassembly rotates.
The quantity of planet wheel subassembly is at least three, still includes second planet wheel subassembly, first planet wheel subassembly and second planet wheel subassembly are located in the fixed ring gear, the sun gear subassembly with the planet wheel meshing of first planet wheel subassembly is connected, first planet wheel subassembly the column gear with the planet wheel meshing of second planet wheel subassembly is connected, the second planet wheel subassembly the column gear with the planet wheel meshing of output level planet wheel subassembly is connected.
The post gear of first planet wheel subassembly passes the middle part through-hole of the second mounting panel of second planet wheel subassembly, the lower extreme of the post gear of first planet wheel subassembly with the first mounting panel looks butt of second planet wheel subassembly, the post gear of second planet wheel subassembly passes the middle part through-hole of the second mounting panel of output level planet wheel subassembly, the lower extreme of the post gear of second planet wheel subassembly with the first mounting panel looks butt of output level planet wheel subassembly.
The electric valve further comprises a valve rod, the first mounting plate of the output-stage planetary wheel assembly is fixedly or limitedly connected with one end of the valve rod, and the other end of the valve rod is fixedly or limitedly connected with the valve core.
The first mounting plate of the output-stage planetary wheel assembly is provided with a circular ring part protruding downwards, the transmission assembly further comprises a second transmission mechanism, the second transmission mechanism comprises a gear shaft, the gear shaft comprises a gear shaft large-diameter part and a gear shaft small-diameter part, and the gear shaft large-diameter part extends into the circular ring part and is fixedly connected with the circular ring part in an interference fit, clamping or welding mode;
the electric ball valve further comprises a bearing, wherein at least part of the bearing is positioned in the stepped hole, the small-diameter part of the gear shaft penetrates through the bearing, the first shoulder is abutted against one side of the bearing, and the other side part of the bearing is abutted against the second shoulder.
The fixed gear ring comprises a first cylindrical part and a second cylindrical part, the inner circumferential wall part of the first cylindrical part is provided with the inner tooth part, the first cylindrical part comprises a large-diameter part and a small-diameter part, the inner diameter of the large-diameter part is equal to or approximately equal to the inner diameter of the small-diameter part, the small-diameter part extends into the second cylindrical part from one end, far away from the connecting seat, of the second cylindrical part, the large-diameter part is abutted to the second cylindrical part, the outer diameter of the large-diameter part is equal to or approximately equal to the outer diameter of the second cylindrical part, the second cylindrical part is fixedly connected with the first cylindrical part, one side, facing the sleeve, of the connecting seat is provided with a first boss and a second boss, one end, facing the connecting seat, of the second cylindrical part is sleeved on the first boss, and the second cylindrical part is in interference fit or welded connection with the first boss, one end of the opening of the sleeve is sleeved on the second boss, and the sleeve and the second boss are welded, fixed and sealed;
the large diameter portion is provided with a plurality of recesses at a circumferential wall portion, and the second cylindrical portion is projected with respect to a bottom of the recesses in a radial direction.
The fixed gear ring comprises a first cylindrical part and a second cylindrical part, the first cylindrical part is positioned inside the second cylindrical part and is relatively fixed, and the upper end part of the second cylindrical part protrudes upwards relative to the first cylindrical part.
The sun wheel component also comprises a disk component, one end of the sun wheel is fixedly connected with the lower surface part of the disk component, or the sun wheel and the disc component are in an integral structure, the circumferential edge part of the disc component is fixedly connected with the upper end part of the rotor component, the sun wheel assembly is provided with a first through hole at or near the central axis, the first mounting plate is also provided with a second through hole at or near the central axis, the upper end part of the large-diameter part of the gear shaft is also provided with a first blind hole part which is arranged corresponding to the second through hole, the driving mechanism also comprises a motor shaft, the motor shaft passes through the first through hole and the second through hole, the lower end of the motor shaft extends into the first blind hole part, and the motor shaft is abutted against the bottom of the first blind hole part, and is in clearance fit with the first blind hole part.
The motorised valve still is provided with position detection subassembly and terminal box, position detection subassembly includes magnetic ring, sensor and control panel, third planet wheel subassembly with the valve rod transmission is connected, the valve rod passes magnetic ring, control panel and terminal box, the control panel is located the terminal box, the sensor set up in the control panel, the sensor can detect out the rotatory magnetic pole that produces of magnetic ring changes.
According to the electric valve, the rotor assembly is fixedly connected with the sun wheel assembly, the fixed gear ring and the at least one planet wheel assembly are arranged in the rotor assembly, the rotor assembly of the driving mechanism drives the first mounting plate to rotate through the sun wheel assembly and the planet wheels, the space in the rotor assembly is fully utilized, part of the structure of the transmission assembly can be relatively compact, and therefore the size of the electric valve is relatively small.
Drawings
Fig. 1 is a schematic perspective view of an electrically operated valve according to an embodiment of the present invention;
figure 2 is a schematic cross-sectional view of the electrically operated valve of figure 1;
figure 3 is a schematic perspective view of a sun gear assembly of the electrically operated valve of figure 1;
figure 4 is a schematic perspective view of a planetary assembly in the electrically operated valve of figure 1;
figure 5 is a schematic top view of the planetary assembly in the electrically operated valve of figure 1;
FIG. 6 is a schematic perspective view of a stationary ring gear assembly in the electrically operated valve of FIG. 1;
FIG. 7 is a perspective view of the first cylindrical portion of the fixed ring gear assembly of FIG. 6;
figure 8 is a schematic perspective view of an alternative view of the fixed ring gear assembly in the electrically operated valve of figure 1;
fig. 9 is a schematic perspective view of an electrically operated valve according to another embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
One embodiment of the present invention is shown in fig. 1 to 8. The electric valve 100 of the present embodiment includes a drive mechanism 110, a transmission assembly 120, a valve body assembly 130, and a valve body 140. As shown in fig. 2, the driving mechanism 110 includes a motor assembly 111, a sleeve 112 and a connecting seat 113, the motor assembly 111 includes a coil assembly 1110, a rotor assembly 1111 and a motor shaft 1112, the coil assembly 1110 is sleeved on the sleeve 112, the driving mechanism 110 further includes a positioning bracket 1113, the positioning bracket 1113 includes a central hole, the positioning bracket 1113 is located in the sleeve 112 and fixed on the upper end of the sleeve 112, the upper end of the motor shaft 1112 extends into the central hole of the positioning bracket 1113, the motor shaft 1112 is in clearance fit with the inner wall corresponding to the central hole, and the positioning bracket 1113 plays a positioning role for the motor shaft 1112. The rotor assembly 1111 is incorporated in the casing 8, the rotor assembly 1111 has a substantially cylindrical shape, the motor shaft 1112 is substantially positioned at the axial center line of the rotor assembly 1111, and the rotor assembly 1111 is rotatable around the motor shaft 1112.
As shown in fig. 2, one side of the connection seat 113 facing the sleeve 112 is provided with a first boss 1131 and a second boss 1132, an outer diameter of the first boss 1131 is smaller than an outer diameter of the second boss 1132, the first boss 1131 is located above the second boss 1132, an open end of the sleeve 112 is sleeved on the second boss 1132, and the sleeve 112 and the second boss 1132 are welded and fixed and are arranged in a sealing manner. The electric valve 100 further comprises a cannula cavity 10, where it is noted that the cannula cavity 10 is formed by a cannula sleeve 112, or the cannula cavity 10 is formed by a part of a connection socket 113 and a part of a cannula sleeve 112; rotor assembly 1111 is located in cannula lumen 10 and motor shaft 1112 is located at least partially in cannula lumen 10.
As shown in fig. 2, the transmission assembly 120 includes a first transmission mechanism, the first transmission mechanism includes a sun gear assembly 121, a planetary gear assembly 122 and a fixed ring gear 123, and the planetary gear assembly 122 is at least partially embedded in the fixed ring gear 123. As shown in fig. 3, the sun gear assembly 121 includes a disk member 1211 and a sun gear 1212, and one end of the sun gear 1212 is fixedly connected to a lower surface portion of the disk member 1211, or the sun gear 1212 and the disk member 1211 are integrally configured, and a central axis of the sun gear 1212 is coincident with or approximately coincident with a central axis of the disk member 1211. The sun gear member 121 is provided with a first through hole 1213 near the central axis or central axis, where it should be clear that the first through hole 1213 is partly located in the disc member 1211 and partly located in the sun gear 1212, the motor shaft 1112 passes through the first through hole 1213, and the motor shaft 1112 is clearance fitted to the sun gear member 121.
As shown in fig. 2, the circumferential edge of the circular disk member 1211 is fixedly connected to the upper end of the rotor assembly 1111, that is, the sun gear member 121 is fixedly connected to the rotor assembly 1111, when the sun gear member 121 is made of a plastic material, the sun gear member 121 and the rotor assembly 1111 may be fixedly connected through an injection molding process, or, when the sun gear member 121 is made of a metal material, the circular disk member 1211 and the inner wall of the rotor assembly 1111 may be in interference fit to achieve the fixed connection, so that the rotor assembly 1111 can rotate around the motor shaft 1112. The electric valve 100 further includes a spacer 150, the spacer 150 is sleeved on the motor shaft 1112, and the spacer 150 is located between the positioning bracket 1113 and the sun gear assembly 121, so as to reduce friction between the positioning bracket 1113 and the rotor assembly 1111.
As shown in fig. 4, the planetary wheel assembly 122 includes planetary wheels 1221, a first mounting plate 1222, a second mounting plate 1223 and a fixed shaft 1224, the fixed shaft 1224 is equal to the planetary wheels 1221, in this embodiment, the number of the planetary wheels 1221 is three, three planetary wheels 1221 are rotatably disposed between the first mounting plate 1222 and the second mounting plate 1223 through the fixed shaft 1224, the second mounting plate 1223 is provided with a central through hole, and the sun wheel 1212 passes through the central through hole of the second mounting plate 1223 and is in meshing connection with the inner sides of the three planetary wheels 1221, where it is defined that one side of the planetary wheels 1221 near the central axis of the planetary wheel assembly 122 is referred to as inner side and the other opposite side is referred to as outer side.
The first mounting plate 1222 includes a circular plate portion 1225 and a column gear 1226, one end of the column gear 1226 is fixedly connected to the circular plate portion 1225 at or near the center of the circular plate portion 1225, or the column gear 1226 is integrally formed with the circular plate portion 1225, and the column gear 1226 protrudes downward with respect to the circular plate portion 1225. As shown in fig. 5, the first mounting plate 1222 is further provided with a second through hole 1227 near the central axis or the central axis, the second through hole 1227 is partially located in the circular plate portion 1225 and partially located in the column gear 1226, the second through hole 1227 is disposed corresponding to the first through hole 1213, the motor shaft 1112 passes through the second through hole 1227, and the motor shaft 1112 is in clearance fit with the first mounting plate 1222.
It should be noted that, the first transmission mechanism includes at least one planetary wheel assembly 122, at least one planetary wheel assembly 122 includes an output stage planetary wheel assembly, when the transmission ratio requirement is low, only one output stage planetary wheel assembly may be provided, and as the transmission ratio requirement increases, the number of planetary wheel assemblies 122 may be gradually increased.
As shown in fig. 2, the three planetary gear assemblies 122 are located in the fixed ring gear 123, and the motor shaft 1112 passes through the sun gear assembly 121, the first planetary gear assembly 122a, the second planetary gear assembly 122b, and the output stage planetary gear assembly 122c in sequence, so that the sun gear assembly 121 and the three planetary gear assemblies 122 can rotate around the same central axis.
The sun gear 1212 penetrates through a central through hole of the second mounting plate 1223 of the first planetary gear assembly 122a and is engaged with the inner sides of the three planetary gears 1221 of the first planetary gear assembly 122a, the lower end of the sun gear 1212 is in contact with the first mounting plate 1222 of the first planetary gear assembly 122a, the second mounting plate 1223 of the first planetary gear assembly 122a is spaced from the disc member 1211, and the upper end of the fixed ring gear 123 is also spaced from the disc member 1211.
The column gear 1226 of the first mounting plate 1222 of the first planetary wheel assembly 122a passes through the middle through hole of the second mounting plate 1223 of the second planetary wheel assembly 122b and is engaged with the inner sides of the three planetary wheels 1221 of the second planetary wheel assembly 122b, the lower end of the column gear 1226 of the first mounting plate 1222 of the first planetary wheel assembly 122a is abutted against the first mounting plate 1222 of the second planetary wheel assembly 122b, the second mounting plate 1223 of the second planetary wheel assembly 122b is spaced from the circular plate 1225 of the first planetary wheel assembly 122a, and during the rotation of the transmission assembly 120, the friction between the circular plate 1225 of the first planetary wheel assembly 122a and the second mounting plate 1223 of the second planetary wheel assembly 122b can be reduced. Second planetary wheel assembly 122b cooperates with output stage planetary wheel assembly 122c in the same or similar manner and is not described in detail herein.
It should be noted here that the first mounting plates 1222 of all three planetary wheel assemblies 122 function to transmit the power of the drive mechanism 110 during rotation of the transmission assembly.
As shown in fig. 2 and 6, the fixed ring gear 123 is at least partially embedded in the rotor assembly 1111, one end of the fixed ring gear 123 is fixedly connected with the connection seat 113, the outer diameter of the fixed ring gear 123 is smaller than the inner diameter of the rotor assembly 1111, and the rotor assembly 1111 can freely rotate relative to the fixed ring gear 123. The fixed ring gear 123 includes a first cylindrical portion 1231 and a second cylindrical portion 1232, and an inner circumferential wall portion of the first cylindrical portion 1231 is provided with internal teeth 1233, and here, it should be noted that the outer side of the planetary gear 1221 of each planetary gear assembly 122 described above is in meshing connection with the internal teeth 1233. As shown in fig. 7, the first cylinder portion 1231 includes a large diameter portion 1234 and a small diameter portion 1235, and the inner diameter of the large diameter portion 1234 is equal or approximately equal to the inner diameter of the small diameter portion 1235, and it can be understood that the internal teeth portions 1233 are partially located at the large diameter portion 1234 and partially located at the small diameter portion 1235.
The small diameter portion 1235 extends into the second cylinder portion 1232 from an end of the second cylinder portion 1232 away from the connection seat 113, the large diameter portion 1234 may abut against the second cylinder portion 1232, and an outer diameter of the large diameter portion 1234 is the same as or approximately the same as an outer diameter of the second cylinder portion 1232. The second cylindrical portion 1232 is fixedly connected to the first cylindrical portion 1231, in this embodiment, the first cylindrical portion 1231 is made of a plastic material, the second cylindrical portion 1232 is made of a metal material, a plurality of fitting holes 1236 may be opened in a circumferential wall portion of the second cylindrical portion 1232, the first cylindrical portion 1231 is injection-molded by injection-insert-molding of the second cylindrical portion 1232, and a convex portion 1237 that extends into the fitting hole 1236 is formed in the first cylindrical portion 1231, which is advantageous for fixedly connecting the second cylindrical portion 1232 to the first cylindrical portion 1231.
The first boss 1131 is sleeved at one end of the second cylindrical portion 1232 facing the connection seat 113, and the second cylindrical portion 1232 is in interference fit with the first boss 1131 or is in welded connection with the first boss 1131, so that the fixed gear ring 123 is fixedly connected with the connection seat 113. As shown in fig. 8, the large diameter portion 1234 has a plurality of recesses 1238 provided in a circumferential wall portion, and the second cylinder portion 1232 protrudes in a radial direction with respect to the bottom of the recesses 1238, and when the second cylinder portion 1232 is interference-fitted to the first boss 1131, interference press fitting can be performed by pressing the portion of the second cylinder portion 1232 protruding from the bottom of the recesses 1238, and deformation of the first cylinder portion 1231 caused by a pressing force directly acting on the first cylinder portion 1231 is avoided.
It should be noted here that the first cylinder portion 1231 may not be provided with the large diameter portion 1234, and the upper end portion of the second cylinder portion 1232 may be provided to protrude upward with respect to the small diameter portion 1235, so that the pressing force acts on the upper end portion of the second cylinder portion 1232, and the deformation of the first cylinder portion 1231 due to the force can also be avoided.
In the electric valve 100 of the present embodiment, the rotor assembly 1111 is fixedly connected to the sun gear assembly 121, the fixed ring gear 123 and the plurality of planetary gear assemblies 122 are disposed in the rotor assembly 1111, so that the space inside the rotor assembly 1111 is fully utilized, and the volume of the transmission assembly is relatively small under the same transmission ratio, thereby making the volume of the electric valve 100 relatively small.
As shown in fig. 2, in the present embodiment, the transmission assembly 120 further includes a second transmission mechanism, the second transmission mechanism includes a gear shaft 124, a first gear 125 and a second gear 126, the electric valve 100 further includes a valve rod 127, the central axes of rotation of the gear shaft 124 and the first gear 125 are coincident or approximately coincident, and the central axes of rotation of the second gear 126 and the valve rod 127 are coincident or approximately coincident.
It should be clear that the rotation center axes of the gear shaft 124 and the first gear 125 are coincident or approximately coincident with the rotation center axis of the planetary wheel assembly 122, and it should be noted here that, in order to facilitate the fixed connection of the output stage planetary wheel assembly 122c and the gear shaft 124, the column gear 1226 of the output stage planetary wheel assembly 122c may be configured as a circular ring portion protruding downward, the gear shaft 124 includes a gear shaft large-diameter portion 1241 and a gear shaft small-diameter portion 1242, and the gear shaft large-diameter portion 1241 extends into the circular ring portion and is fixedly connected with the circular ring portion by interference fit or welding. The upper end of the gear shaft large-diameter part 1241 is further provided with a first blind hole part 1243, the first blind hole part 1243 is arranged corresponding to the second through hole 1227 of the output-stage planetary wheel assembly 122c, the lower end of the motor shaft 1112 extends into the first blind hole part 1243 and abuts against the bottom of the first blind hole part 1243, the motor shaft 1112 is in clearance fit with the first blind hole part 1243, and the first blind hole part 1243 plays a limiting role in the motor shaft 1112. When the first mounting plate 1222 of the output stage planet wheel assembly 122c rotates, it can drive the gear shaft 124 to rotate synchronously.
It should also be noted that the first mounting plate 1222 of the output stage planetary wheel assembly 122c and the gear shaft 124 may be connected by a conventional connection method such as a limit.
As shown in fig. 2, a first shoulder 1244 is disposed at a connection position of the gear shaft large-diameter portion 1241 and the gear shaft small-diameter portion 1242 of the gear shaft 124, a stepped hole portion 1133 is disposed at or near a center of the connecting seat 113, the stepped hole portion 1133 is provided with a second shoulder 1134, the electric ball valve 100 further includes a bearing 160, at least a portion of the bearing 160 is located in the stepped hole portion 1133, the gear shaft small-diameter portion 1242 passes through the bearing 160, the first shoulder 1244 abuts against one side of the bearing 160, and the other side of the bearing 160 abuts against the second shoulder 1134, so as to axially limit the gear shaft 124. The friction between the gear shaft 124 and the stepped hole portion 1133 can be reduced by providing the bearing 160.
As shown in fig. 2, the valve body assembly 130 includes a first valve body member 131 and a second valve body member 132, a lower end of the first valve body member 131 is provided with an opening, an upper end of the first valve body member 131 is provided with a first opening portion 1311, an end of the stepped hole portion 1133 of the coupling seat 113 facing the first valve body member 131 and the first opening portion 1311 may be connected by a screw, and a sealing ring is provided between the coupling seat 113 and the first opening portion 1311 to achieve sealing. The lower end of the first body member 131 is fixedly connected to and sealingly arranged with the upper end of the second body member 132.
The motor-operated valve 100 is further provided with a position detecting unit capable of detecting the position of the valve element 140, the position detecting unit includes a magnetic ring 181, a sensor 182, and a control board 171, and the sensor 182 is provided on the control board 171. The first valve body part 131 comprises a first valve body part cavity 1312, the first opening part 1311 is communicated with the first valve body part cavity 1312, the second valve body part 132 comprises a second valve body part cavity 1321, the upper end of the second valve body part 132 is provided with a second opening part 1322, the magnetic ring 181 and the second gear 126 are positioned in the first valve body part cavity 1312, the second gear 126 is provided with a third through hole 1261, the valve core 140 is arranged in the second valve body part cavity 1321, the valve rod 127 sequentially penetrates through the magnetic ring 181, the third through hole 1261 and the second opening part 1322 and is fixedly or limitedly connected with the magnetic ring 181 and the second gear 126, and the part of the valve rod 127 penetrating through the second opening part extends into the second valve body cavity 1321 and is fixedly or limitedly connected with the valve core 140.
It should be noted here that in the present embodiment, the second gear 126 is eccentrically disposed such that the magnetic ring 181 and the valve rod 127 are located in the vicinity of the inner peripheral wall portion of the first valve body member 131, so that the sensor 182 and the control board 171 can be conveniently disposed outside the side of the first valve body member 131 corresponding to the magnetic ring 181, omitting an additional electrical connection component.
The motor-operated valve 100 further includes a terminal box 170, the terminal box 170 is positioned outside the first valve body part 131 and is fixedly contacted with the first valve body part 131, the control board 171 is positioned in the terminal box 170, the sensor 182 can detect the change of the magnetic pole caused by the rotation of the magnetic ring 181, and then the rotation angle of the magnetic ring 181 is calculated by the calculating device.
The part of the gear shaft small-diameter part 1242 passing through the bearing 160 is located in the first valve body member cavity 1312, the lower end of the gear shaft small-diameter part 1242 is fixedly or limitedly connected with the first gear 125, and the first gear 125 is in meshed connection with the second gear 126.
The operation principle of the motor-operated valve 100 of the present embodiment is as follows: after the driving mechanism 110 is powered on, the rotor assembly 1111 is driven to rotate, the rotor assembly 1111 rotates to drive the sun gear assembly 121 to rotate, the sun gear assembly 121 drives the planet gears 1221 of the first planet gear assembly 122a to rotate through the rotation of the sun gear 1212, while the planet gears 1221 rotate around the axes thereof, the planet gears 1221 are also meshed with the internal teeth 1233 of the fixed gear ring 123 to rotate, forming a circumferential rotation around the sun gear 1212, that is, the sun gear 1212 rotates around the motor shaft 1112, thereby driving the first mounting plate 1222 and the second mounting plate 1223 to rotate, the first mounting plate 1222 drives the planet gears 1221 of the second planet gear assembly 122b to rotate through the rotation of the column gear 1226, similarly, the power is sequentially transmitted to the first mounting plate 1222 of the output-stage planet gear assembly 122c, the first mounting plate 1222 of the output-stage planet assembly 122c rotates to drive the gear shaft 124 to rotate, the gear shaft 124 rotates to drive the first gear 125 to rotate, thereby driving the second gear 126 to rotate, the second gear 126 rotates to drive the valve rod 127 to rotate, the valve rod 127 rotates to drive the valve core 140 to rotate, and meanwhile, the position detection assembly can detect the rotation angle of the valve core 140.
It should be clear here that the transmission principle of the sun gear 1212 and the first planetary gear assembly 122a is the same as that of the column gear 1226 of the first planetary gear assembly 122a and the second planetary gear assembly 122b, and that of the column gear 1226 of the second planetary gear assembly 122b and the output stage planetary gear assembly 122 c.
In another embodiment of the present invention, the electric valve 100 may not have the gear shaft 124, the first gear 125 and the second gear 126, that is, the output stage planetary gear assembly 122c may be directly in transmission connection with the valve rod 127', as shown in fig. 9, a portion of the valve rod 127' passing through the magnetic ring 181', the control plate 171', the junction box 170' and the second opening 1322' extends into the second valve body cavity 1321' through the second opening 1322', and is fixedly or limitedly connected with the valve core 140', the sensor 182' is disposed on the control plate 171', the magnetic ring 181' is located above the sensor 182', the magnetic ring 181' has a certain axial distance from the sensor 182', and thus, the volume of the electric valve 100 is relatively reduced.
It should be noted here that when the electric valve 100 does not need the position detection function of the valve core 140, that is, the position detection assembly is not provided, the electric valve 100 may not be provided with the second transmission mechanism, that is, the output stage planetary gear assembly 122c may be directly connected with the valve rod 127 in a fixed or limited manner, and the first valve body component 131 may be omitted, so that the volume of the electric valve 100 is further reduced relatively.
The second valve body member 132 is further provided with a third opening 1323, the second valve body member 132 further comprises an end cover 1324, and the end cover 1324 and the third opening 1323 can be fixed and arranged in a sealing manner through threads or welding. The second valve body member 132 is further provided with a first interface port 1325 and a second interface port 1326, the first interface port 1325 being located at the end cap 1324. The valve spool 140 is located between the first and second interface ports 1325, 1326, the second valve body member 132 further includes a first valve seat 1327 and a second valve seat 1328, the first valve seat 1327 is located between the valve spool 140 and the first interface port 1325, the second valve seat 1328 is located between the valve spool 140 and the second interface port 1326, and the first valve seat 1327 and the second valve seat 1328 are in sliding engagement with the valve spool 140.
The valve core 140 is provided with a valve core passage 141, the first connecting port 1325 is provided with a first passage 1329, the second connecting port 1326 is provided with a second passage 1330, the electric valve 100 in the embodiment includes a fully closed state and a fully open state, in the fully closed state, the solid outer surface part of the valve core 140 is respectively matched with the first connecting port 1325 and the second connecting port 1326, the first passage 1329 and the second passage 1330 are not communicated, and in the fully open state, the first passage 1329 is communicated with the second passage 1330 through the valve core passage 141 of the valve core 140.
It should be noted here that the valve core 140 may be spherical or quasi-spherical, or may be cylindrical.
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 (10)

1. An electric valve comprises a driving mechanism, a transmission assembly, a valve body assembly and a valve core, and is characterized in that the driving mechanism comprises a rotor assembly, a sleeve and a connecting seat, one end of an opening of the sleeve is fixedly connected with the connecting seat and is provided with a sleeve cavity, the rotor assembly is accommodated in the sleeve cavity, the transmission assembly comprises a first transmission mechanism, the first transmission mechanism comprises a sun wheel assembly, a fixed gear ring and a planet wheel assembly, the sun wheel assembly is fixed with the rotor assembly, the fixed gear ring is fixed with the connecting seat, and at least part of the fixed gear ring is positioned in the rotor assembly;
the planet wheel assembly comprises a first planet wheel assembly and an output-stage planet wheel assembly, the first mounting plate of the first planet wheel assembly comprises a cylindrical gear, the cylindrical gear of the first planet wheel assembly is connected with the planet wheel meshing of the output-stage planet wheel assembly, and the first mounting plate of the output-stage planet wheel assembly directly or indirectly drives the valve core to act.
2. The electric valve according to claim 1, wherein the first mounting plate of the first planetary gear assembly comprises a circular plate portion, one end of the column gear is located at or near the center of the circular plate portion, the column gear is fixedly connected with the circular plate portion, or the column gear is integrated with the circular plate portion, the fixed ring gear is meshed with the planet gear of the first planetary gear assembly, and the rotor assembly of the driving mechanism drives the first mounting plate of the output-stage planetary gear assembly to rotate through the sun gear assembly, the first planetary gear assembly and the planet gear of the output-stage planetary gear assembly.
3. The electric valve according to claim 2, wherein the number of the planetary wheel assemblies is at least three, and further comprising a second planetary wheel assembly, the first planetary wheel assembly and the second planetary wheel assembly are located in the fixed ring gear, the sun wheel assembly is in meshing connection with the planetary wheels of the first planetary wheel assembly, the column gear of the first planetary wheel assembly is in meshing connection with the planetary wheels of the second planetary wheel assembly, and the column gear of the second planetary wheel assembly is in meshing connection with the planetary wheels of the output stage planetary wheel assembly.
4. The electrically operated valve of claim 3, wherein the post gear of the first planet assembly passes through the central through hole of the second mounting plate of the second planet assembly, the lower end of the post gear of the first planet assembly abuts the first mounting plate of the second planet assembly, the post gear of the second planet assembly passes through the central through hole of the second mounting plate of the output stage planet assembly, and the lower end of the post gear of the second planet assembly abuts the first mounting plate of the output stage planet assembly.
5. The electrically operated valve according to any one of claims 1 to 4, further comprising a valve stem, wherein the first mounting plate of the output stage planetary wheel assembly is fixedly or limitedly connected with one end of the valve stem, and the other end of the valve stem is fixedly or limitedly connected with the valve core.
6. The electric valve according to any one of claims 1 to 4, wherein the first mounting plate of the output stage planetary wheel assembly is provided with a circular ring part protruding downwards, the transmission assembly further comprises a second transmission mechanism, the second transmission mechanism comprises a gear shaft, the gear shaft comprises a gear shaft large-diameter part and a gear shaft small-diameter part, and the gear shaft large-diameter part extends into the circular ring part and is fixedly connected with the circular ring part through interference fit, clamping or welding;
the electric valve further comprises a bearing, wherein at least part of the bearing is positioned in the stepped hole, the small-diameter part of the gear shaft penetrates through the bearing, the first shoulder is abutted against one side of the bearing, and the other side part of the bearing is abutted against the second shoulder.
7. The electric valve according to claim 6, wherein the fixed gear ring comprises a first cylindrical portion and a second cylindrical portion, the first cylindrical portion comprises a large diameter portion and a small diameter portion, the inner diameter of the large diameter portion is equal to or approximately equal to the inner diameter of the small diameter portion, the small diameter portion extends into the second cylindrical portion from one end of the second cylindrical portion, which is far away from the connecting seat, the large diameter portion is abutted with the second cylindrical portion, the outer diameter of the large diameter portion is equal to or approximately equal to the outer diameter of the second cylindrical portion, the second cylindrical portion is fixedly connected with the first cylindrical portion, one side of the connecting seat, which faces the sleeve, is provided with a first boss and a second boss, one end of the second cylindrical portion, which faces the connecting seat, is sleeved on the first boss, and the second cylindrical portion is in interference fit or welded connection with the first boss, one end of the opening of the sleeve is sleeved on the second boss, and the sleeve and the second boss are welded, fixed and sealed;
the large diameter portion is provided with a plurality of recesses at a circumferential wall portion, and the second cylindrical portion is projected with respect to a bottom of the recesses in a radial direction.
8. The electrically operated valve according to claim 7, wherein the stationary ring gear includes a first cylindrical portion and a second cylindrical portion, the first cylindrical portion being located inside the second cylindrical portion and relatively fixed, an upper end portion of the second cylindrical portion projecting upward with respect to the first cylindrical portion.
9. The electric valve according to claim 7 or 8, wherein the sun gear assembly further comprises a disk member, one end of the sun gear is fixedly connected to a lower surface portion of the disk member, or the sun gear and the disk member are integrated, a circumferential edge portion of the disk member is fixedly connected to an upper end portion of the rotor assembly, the sun gear assembly is provided with a first through hole at or near a central axis, the first mounting plate is further provided with a second through hole at or near the central axis, an upper end portion of the large diameter portion of the gear shaft is further provided with a first blind hole portion, the first blind hole portion and the second through hole portion are correspondingly arranged, the driving mechanism further comprises a motor shaft, the motor shaft passes through the first through hole and the second through hole, and a lower end of the motor shaft extends into the first blind hole portion, and the motor shaft is abutted against the bottom of the first blind hole part, and is in clearance fit with the first blind hole part.
10. The electrically operated valve according to claim 9, further comprising a position detecting assembly and a junction box, wherein the position detecting assembly comprises a magnetic ring, a sensor and a control board, the output stage planetary wheel assembly is in transmission connection with a valve rod of the electrically operated valve, the valve rod passes through the magnetic ring, the control board and the junction box, the control board is located in the junction box, the sensor is arranged on the control board, and the sensor can detect a magnetic pole change generated by rotation of the magnetic ring.
CN201910243153.1A 2019-03-28 2019-03-28 Electric valve Active CN111750127B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1036628A (en) * 1988-03-24 1989-10-25 林米托克公司 The differential screw planetary gear system that valve mechanism is used
CN2596144Y (en) * 2003-01-10 2003-12-31 常殿林 Composite planet actuating mechanism
CN102434700A (en) * 2010-09-22 2012-05-02 株式会社不二工机 Planetary gear mechanism and motor-operated valve using the same
JP2013249847A (en) * 2012-05-30 2013-12-12 Saginomiya Seisakusho Inc Flow control valve
CN105422952A (en) * 2014-09-17 2016-03-23 浙江三花股份有限公司 Electrically-operated changeover valve
CN105822822A (en) * 2015-01-08 2016-08-03 艾默生环境优化技术(苏州)有限公司 Reducing mechanism and electronic expansion valve comprising same
CN208057834U (en) * 2018-04-20 2018-11-06 深圳市亚特锐五金塑胶制品有限公司 Automobile air door adjustment gear case

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1036628A (en) * 1988-03-24 1989-10-25 林米托克公司 The differential screw planetary gear system that valve mechanism is used
CN2596144Y (en) * 2003-01-10 2003-12-31 常殿林 Composite planet actuating mechanism
CN102434700A (en) * 2010-09-22 2012-05-02 株式会社不二工机 Planetary gear mechanism and motor-operated valve using the same
JP2013249847A (en) * 2012-05-30 2013-12-12 Saginomiya Seisakusho Inc Flow control valve
CN105422952A (en) * 2014-09-17 2016-03-23 浙江三花股份有限公司 Electrically-operated changeover valve
CN105822822A (en) * 2015-01-08 2016-08-03 艾默生环境优化技术(苏州)有限公司 Reducing mechanism and electronic expansion valve comprising same
CN208057834U (en) * 2018-04-20 2018-11-06 深圳市亚特锐五金塑胶制品有限公司 Automobile air door adjustment gear case

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