CN110230722A - A kind of electric expansion valve - Google Patents
A kind of electric expansion valve Download PDFInfo
- Publication number
- CN110230722A CN110230722A CN201910617481.3A CN201910617481A CN110230722A CN 110230722 A CN110230722 A CN 110230722A CN 201910617481 A CN201910617481 A CN 201910617481A CN 110230722 A CN110230722 A CN 110230722A
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- China
- Prior art keywords
- magnetic ring
- valve
- ring
- electric expansion
- post holes
- Prior art date
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- 238000005096 rolling process Methods 0.000 claims description 34
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 238000003466 welding Methods 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 230000007306 turnover Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 239000012530 fluid Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 206010061688 Barotrauma Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- 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
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
-
- 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
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a kind of electric expansion valves, the high electric expansion valve of especially a kind of magnetic coupling, anti-clamping stagnation, flow control precision, it is characterized by comprising valve component, executive module, driving structures, the valve component includes valve seat, valve seat axial direction lower part and lateral mutually weld together with B pipe, A pipe respectively, the valve seat upper surface is welded with ring flange, and described turn over welds together with disrance sleeve above.The driving structure, including stepper motor, the stepper motor drives the driven gear being inserted on the disrance sleeve by the driving gear on stepper motor output shaft, then drives the internal magnetic ring in the disrance sleeve by the outer magnetic ring on the driven gear, so that executive module be driven to rotate.A kind of electric expansion valve provided by the present invention, not only superior performance, and also it is at low cost.
Description
Technical field
The present invention relates to a kind of electric expansion valves, high more particularly, to a kind of magnetic coupling, anti-clamping stagnation, flow control precision
Electric expansion valve.
Background technique
Electric expansion valve is the important component in cooling/heating system, is mainly used for that the flow of fluid is adjusted.Mesh
Structure used by preceding electric expansion valve in the market is substantially the same, is all needle valve structure.The electric expansion valve includes
Stepper motor driving mechanism (step motor stator: the executive module of coil and valve inner) executes structure (thread screw machine
Structure), throttle structure (needle valve port) and some relevant structures.
Within air-conditioning systems, needle in a high voltage state, can generate axial compressive force to the electric expansion valve, and especially electronics is swollen
When swollen valve is in close state, needle has been completely embedded into valve port, will receive the influence of axial air pressure.Therefore, knot is entirely executed
The frictional force that structure is subject to can greatly increase, and eventually result in electric expansion valve clamping stagnation.
The driving structure of electric expansion valve currently on the market is by the execution of step motor stator, coil and valve inner
Component composition, this coil be substantially it is customized, cost is also relatively high, is also to pass through height there are also the magnet rotor in executive module
The mold of cost is customized.
Say again, it is thread screw mechanism that structure is executed used by current electric expansion valve, due to screw thread and screw rod it
Between there must be certain gap, otherwise can lead to electric expansion valve clamping stagnation because of thread screw gapless.Simultaneously as spiral shell
Axial gap between line screw rod will lead to valve rod and move up and down, to further result in the instability of flow of fluid.
Summary of the invention
Present invention purpose to be achieved is to provide a kind of electric expansion valve, especially a kind of magnetic coupling, anti-clamping stagnation, flow
Control electric expansion valve with high accuracy.
In order to achieve the above object, the present invention adopts the following technical scheme: a kind of electric expansion valve, including valve component,
Executive module and driving structure:
Wherein, the valve component includes valve seat, and valve seat axial direction lower part mutually welds together with B pipe, the valve seat
Laterally weld together with A pipe, form annular through groove inside the valve seat, the annular through groove upper surface forms platform in valve seat
Rank, step welds together with disk on ring flange in the valve seat, and the disk upper surface forms step circles, the step
Circle welds together with the disrance sleeve to match, and the outer diameter of the disk is bigger than the outer diameter of the step circles.
Wherein, the executive module, including valve rod are mounted on the guide sleeve on the valve seat by the valve rod, described to lead
Set is embedded in the valve seat by the mesoporous of ring flange.
Wherein, the driving structure, including stepper motor, the stepper motor pass through the active on stepper motor output shaft
Gear drives the driven gear being inserted on the disrance sleeve, then drives the isolation by the outer magnetic ring on the driven gear
Internal magnetic ring in casing, so that executive module be driven to rotate.
The present invention is further arranged, the lower end surface of the annular through groove forms the circular groove to match with the guide sleeve.
The present invention is further arranged, forms guide hole matching with the valve rod, up and down inside the guide sleeve,
The step to match with the ring flange mesoporous is formed on the outer wall on the guide hole top.
The present invention is further arranged, the guide sleeve lower part is equipped with the seal groove that matches with valve circle, below the guide hole
Axially it is connected with the seal groove.
The present invention is further arranged, forms the hole 0.05~0.1mm less than normal than the guide hole, institute inside the valve circle
The material for stating valve circle is metal or high temperature resistant, corrosion-resistant, wriggling slope very little high polymeric compound.
The present invention is further arranged, the guide sleeve is equipped with the rectangular valve port from outer wall to inner wall, the rectangular valve port
Laterally it is connected with the guide hole lower part, the seal groove.
The present invention is further arranged, the quantity of the rectangular valve port is 1 pair~6 pairs, uniformly distributed.
The present invention is further arranged, the valve rod axial inner forms the first post holes, shape below first post holes
At with first post holes be axially connected and interior boring ratio described in small the second post holes of the first post holes.
The present invention is further arranged, at least a pair of first transverse side holes are formed at the top of first post holes.
The present invention is further arranged, lateral annular groove, the number of the lateral annular groove are formed at the lower part of second post holes
Amount is within 6 (including 6).
The present invention is further arranged, the top of second post holes formed it is a pair of or two pairs or three pairs or
Four pairs of person of the second transverse side holes.
The present invention is further arranged, the top of second transverse side holes forms the positioning to match with the internal magnetic ring
Step column, the height of the positioning step column and the height of first post holes are identical, or than first post holes
It is highly higher；First transverse side holes also are located at the top of the positioning step column.
The present invention is further arranged, first post holes and second post holes are up and down described first
Post holes and first transverse side holes communicate, and second post holes and second transverse side holes communicate.
The present invention is further arranged, the executive module, including internal magnetic ring, the internal magnetic ring is centrally formed to be passed through up and down
Logical mesoporous, the internal magnetic ring are inserted in the positioning step column by the mesoporous；The mesoporous of the internal magnetic ring is above and below
It is additionally provided with the swivel nut slot to match with swivel nut outer diameter and height；
The present invention is further arranged, the executive module, including rolling screw, the rolling screw is embedded in described
In the first post holes on valve rod, a pair of first transverse side holes are embedded with a pair of small steel to match with first transverse side holes
Pearl, a pair of small steel ball are embedded in the helicla flute on the rolling screw, are inserted in the spiral shell above the positioning step column
Set, the inner wall of the swivel nut and a pair of small steel ball are tangent, and the swivel nut and the positioning step column are close-fittings.
The present invention is further arranged, the rolling screw includes spiral shell handle, formed above the disrance sleeve with it is described
The welding hole that spiral shell handle matches, the position of the spiral shell handle are higher than the welding hole, the spiral shell handle by welding with the weldering
It connects hole to link together, the top of the welding hole is equipped with motor fixing frame plate.
The present invention is further arranged, the inner wall of the driven gear forms the to match with the disrance sleeve outer wall
One axis hole, the lower section of the first shaft hole is formed and the second axis hole of the outer magnetic ring outer wall phase close-fitting, the outer magnetic ring it is interior
Portion's pore size and the pore size of the first shaft hole are identical；It is formed and the active on the outer wall of second axis hole
The ring gear that gear matches, the number of teeth of the ring gear are greater than the number of teeth of the driving gear, the driven gear and
The material of the driving gear is metal or high temperature resistant, corrosion resistant high polymeric compound.
The present invention is further arranged, the motor fixing frame plate, including plectane and motor support plate, on the plectane
Equipped with the delthyrium to match with the spiral shell handle, the side of the plectane is connected with the motor support plate, and the motor support plate is logical
Cross the fixed stepper motor of screw hole of the motor support plate；The motor support plate is equipped with to be exported with the stepper motor
The axle sleeve hole that axle sleeve matches；The motor fixing frame plate is fixed on the guard ring.
The present invention is further arranged, the guard ring is equipped with the first support to match with the motor fixing frame plate
Interior step, dust-proof annular groove, the outer diameter of ring gear described in the aperture ratio of the dust-proof annular groove is arranged below in step in the support
Bigger than normal, the lower section of the dust-proof annular groove is equipped with the second support level to match with the valve seat outer wall；Second support level
The either side of lower part form the locating groove to match with the A pipe, the material of the guard ring is high temperature resistant, corrosion resistant
High polymeric compound.
The present invention is further arranged, when the valve rod lower end surface is in contact with the valve circle, the guide sleeve upper surface
It is separated by with the internal magnetic ring lower end surface, the lower end surface of the outer magnetic ring is to be separated by with the disk upper surface on the ring flange
's；Gap between the outer wall of the internal magnetic ring and the inner wall of the disrance sleeve is 0.1~0.5mm, the outer magnetic ring it is interior
Gap between wall and the outer wall of the disrance sleeve is 0.01~0.1mm, the outer magnetic ring and the internal magnetic ring be it is circular,
The pole the N magnetic patch and the pole S magnetic patch of the outer magnetic ring are evenly distributed on the outer magnetic ring inner wall, the pole the N magnetic patch and S of the internal magnetic ring
Pole magnetic patch is evenly distributed on the internal magnetic ring outer wall, the N pole field in the outer magnetic ring and the S pole field in internal magnetic ring, institute
The N pole field stated in S pole field and the internal magnetic ring in outer magnetic ring attracts each other.The internal magnetic ring and the outer magnetic ring
The quantity of number of magnetic pole pairs (number of magnetic pole pairs: the pole N magnetic pole and the pole S magnetic pole are a pair) be a pair or more, and quantity is equal.
Compared with prior art, the invention has the following advantages:
The at high cost, clamping stagnation and the problems such as the low unstable precision of flow control for existing electric expansion valve, the present invention mentions
Gone out the high electric expansion valve of a kind of magnetic coupling, anti-clamping stagnation, flow control accuracy, the electric expansion valve not only will not clamping stagnation, and
And new driving structure is using the stepper motor to circulate in the market, magnet ring is process by easy mold,
It is greatly reduced cost in this way, simultaneously also by the rolling between rolling screw and small steel ball, so that rolling screw and small steel
Gapless between pearl, improves flow control accuracy.
The stepper motor employed in the present invention be circulate in the market, it is more common, do not need to carry out customized；
Secondly, by the fixed stepper motor of the motor fixing frame plate, again by the driving gear band on the stepper motor
The driven gear is moved, the outer magnetic ring being fixed on the driven gear is further advanced by and drives inside the disrance sleeve
Internal magnetic ring rotation, here it is magnetic-coupled electric expansion valves proposed by the present invention.The magnetic coupling mode: pass through the outer magnetic ring
The pole N magnetic patch and the pole S magnetic patch be evenly distributed on the outer magnetic ring, the pole the N magnetic patch and the pole S magnetic patch of the internal magnetic ring are uniformly distributed
The S pole field in N pole field and internal magnetic ring, the S pole field in the outer magnetic ring on the internal magnetic ring, in the outer magnetic ring
It attracts each other with the N pole field in the internal magnetic ring.This driving structure is not only at low cost, but also simple to install, simultaneously
Also improve working efficiency.
The electric expansion valve of anti-clamping stagnation proposed in the present invention passes through valve rod 5, the rolling screw in the executive module
14 and small steel ball 12, when electric expansion valve is in full off state, and the fluid of low pressure or high pressure conditions enters valve inner, due to
It is communicated inside the disrance sleeve with the second transverse side holes on the valve rod, second transverse side holes and second post holes
Communicate, and since in sealed environment, fluid pressure is equal everywhere, the internal orifice dimension above and below the guide sleeve it is equal in magnitude
(i.e. forced area is equal).Therefore, the valve rod is in equilibrium state.Again by between the rolling screw and the small steel ball
Rolling reduce executive module generated frictional force in transmission process since rolling friction is far smaller than sliding friction.
The electric expansion valve of anti-clamping stagnation proposed in the present invention, also by driving gear in the driving structure and from
The reduction ratio (number of teeth/driving gear number of teeth of the reduction ratio=driven gear) of moving gear, further increases the stepping
The torque of motor output drives executive module to provide reliable guarantee for stepper motor.
Flow control accuracy proposed in the present invention is high, be by valve rod in the executive module, rolling screw and
Small steel ball, the lateral annular groove of the valve rod lower part ensure that the valve rod lower part not by lateral effects of air pressure, the rolling screw
It is tangent with the small steel ball and rolling screw is when moving up and down, generation very close to each other, it is provided to improve flow control accuracy
It is reliable to ensure.
Detailed description of the invention
In conjunction with attached drawing, the present invention will be further described:
Fig. 1 is schematic diagram of internal structure of the invention；
Fig. 2 is valve seat schematic diagram A in the present invention；
Fig. 3 is the sectional view A-A of valve seat in the present invention；
Fig. 4 is guide sleeve schematic diagram B in the present invention；
Fig. 5 is the sectional view B-B of guide sleeve in the present invention；
Fig. 6 is valve rod schematic diagram C in the present invention；
Fig. 7 is the sectional view C-C of valve rod in the present invention；
Fig. 8 is ring flange schematic diagram in the present invention；
Fig. 9 is outer magnetic ring schematic diagram in the present invention；
Figure 10 is internal magnetic ring schematic diagram in the present invention；
Figure 11 is driven gear schematic diagram D in the present invention；
Figure 12 is the sectional view D-D of driven gear in the present invention；
Figure 13 is motor fixing frame plate schematic diagram in the present invention；
Figure 14 is disrance sleeve schematic diagram in the present invention；
Figure 15 is rolling screw schematic diagram in the present invention；
Figure 16 is stepper motor diagram in the present invention；
Figure 17 is driving gear schematic diagram in the present invention；
Figure 18 is guard ring schematic diagram E in the present invention；
Figure 19 is the sectional view E-E of guard ring in the present invention.
Specific embodiment:
Below by embodiment, technical solution of the present invention is described in further detail.
As shown in Figure 1, a kind of electric expansion valve, including valve component, executive module and driving structure.
Wherein, as shown in Fig. 2, Fig. 3, Fig. 8, the valve component includes valve seat 3, the axial lower part 302 of the valve seat 3 and B
1 phase of pipe welds together, and the valve seat side opening 304 and A pipe 2 welds together, and annular through groove 303 is formed inside the valve seat 3,
303 upper surface of annular through groove forms step 305 in valve seat, the disk 702 in the valve seat on step 305 and ring flange 7
Weld together, 702 upper surface of disk forms step circles 703, and the step circles 703 are welded with the disrance sleeve 13 to match
Together, the outer diameter of the disk 702 is bigger than the outer diameter of the step circles 703.
Wherein, as shown in Fig. 1, Fig. 8, the executive module includes valve rod 5 and is mounted on the valve seat by the valve rod 5
Guide sleeve 4 on 3, the guide sleeve 4 are embedded in the valve seat 3 by the mesoporous 701 of ring flange 7.
Wherein, as shown in Fig. 1, Figure 16, the driving structure includes stepper motor 15, and the stepper motor 15 passes through stepping
Driving gear 16 on motor output shaft 1502 drives the driven gear 10 being inserted on the disrance sleeve 13, then by it is described from
Outer magnetic ring 8 on moving gear 10 drives the internal magnetic ring 9 in the disrance sleeve 13, so that executive module be driven to rotate.
As shown in Figure 2 and Figure 3, the lower end surface of heretofore described annular through groove 303 forms the circle to match with the guide sleeve 4
Slot 301.
As shown in Figure 4, Figure 5, match with the valve rod 5, leading up and down is formed inside heretofore described guide sleeve 4
Hole 401 forms the step 402 to match with the ring flange mesoporous 701 on the outer wall on 401 top of guide hole；Under the guide sleeve 4
Portion is equipped with the seal groove 403 to match with valve circle 6, and the guide hole 401 is axially connected with the seal groove 403 below；The guide sleeve 4
Equipped with the rectangular valve port 404 from outer wall to inner wall, the rectangular valve port 404 and 401 lower part of guide hole, the seal groove 403
It is lateral to be connected；The quantity of the rectangular valve port 404 is 1 pair~6 pairs, and the circumferencial direction along 4 outer wall of guide sleeve is uniformly distributed.
Heretofore described 5 axial inner of valve rod forms the first post holes 501, first post holes 501 as shown in Figure 6, Figure 7
Formed below be connected with first post holes, 501 axial direction and interior boring ratio described in small the second post holes 502 of the first post holes 501；It is described
At least a pair of first transverse side holes 503 are formed at the top of the first post holes 501；Lateral ring is formed at the lower part of second post holes 502
Slot 506, the quantity of the lateral annular groove 506 are within 6 (including 6), and the top of second post holes 502 forms one
Pair or two pairs or three pairs or four pairs of the second transverse side holes 505；The top of second transverse side holes 505 is formed
The positioning step column 504 to match with the internal magnetic ring 9, the height of the height of the positioning step column 504 and first post holes 501
Degree is identical, or more higher than the height of first post holes 501；First transverse side holes 503 also are located at the positioning
The top of step column 504.First post holes 501 and second post holes 502 are first post holes 501 up and down
It is communicated with first transverse side holes 503, second post holes 502 and second transverse side holes 505 communicate.
According to Fig. 1, Fig. 6, Fig. 7, Figure 10, Figure 13, Figure 14, Figure 15, the present invention makees further the executive module
Ground illustrates.
Wherein, the executive module includes internal magnetic ring 8, and the internal magnetic ring 8 is centrally formed mesoporous 802 up and down, institute
It states internal magnetic ring 8 and the positioning step column 504 is inserted in by the mesoporous 802；The mesoporous 802 of the internal magnetic ring 8 above be equipped with
The swivel nut slot 801 that 18 outer diameter of swivel nut and height match, the mesoporous 802 of the internal magnetic ring 8 is arranged below more inclined than 5 outer diameter of valve rod
Big guide groove 803；
Wherein, the executive module further includes rolling screw 14, and the rolling screw 14 is embedded on the valve rod 5
In one post holes 501, a pair of first transverse side holes 503 are embedded with a pair of small steel to match with first transverse side holes 503
Pearl 12, a pair of small steel ball 12 are embedded in the helicla flute 1402 on the rolling screw 14, the positioning step column 504 it is upper
Square set enters the swivel nut 18, and the inner wall of the swivel nut 18 and a pair of small steel ball 12 are tangent, the swivel nut 18 and the positioning
Step column 504 is close-fitting.
Heretofore described rolling screw 14 includes spiral shell handle 1401, is formed and the spiral shell handle above the disrance sleeve 13
1401 welding holes 1301 to match, after the spiral shell handle 1401 is embedded in the welding hole 1301, the position of the spiral shell handle 1401 is higher than
The top of the welding hole 1301, the welding hole 1301 is equipped with motor fixing frame plate 11.
According to Figure 13, Figure 16, heretofore described motor fixing frame plate 11, including plectane 1104 and motor support plate
1105, the plectane 1104 is equipped with the delthyrium 1101 that matches with the spiral shell handle 1401, the side of the plectane 1104 with it is described
Motor support plate 1105 is connected, screw hole 1102 and the stepping of the electricity supporting plate 1105 by the motor support plate 1105
The fixed stepper motor 15 of screw hole 1501 on motor 15；The motor support plate 1105 is equipped with defeated with the stepper motor
The axle sleeve hole 1103 that axle sleeve matches out；The motor fixing frame plate 11 is fixed on the guard ring 17.
According to Figure 11, Figure 12, Figure 17, the inner wall of heretofore described driven gear 10 is formed and the disrance sleeve
The lower section of the first shaft hole 1004 that 13 outer walls match, the first shaft hole 1004 is formed and the 8 outer wall phase close-fitting of outer magnetic ring
Second axis hole 1003, the inside pore size of the outer magnetic ring 8 and the pore size of the first shaft hole 1004 are identical；Institute
State the ring gear 1001 for being formed on the outer wall of the second axis hole 1003 and being matched with the driving gear 16, the ring gear 1001
The number of teeth be greater than the number of teeth of the driving gear 16.
According to Figure 18, Figure 19, heretofore described guard ring 17 is equipped with to match with the motor fixing frame plate 11
First support in step 1701, it is described first support in step 1701 dust-proof annular groove 1704, the dust-proof annular groove is arranged below
The outer diameter of the ring gear 1001 of driven gear 10 described in 1704 aperture ratio is bigger than normal, and the lower section of the dust-proof annular groove 1704 is equipped with
The second support level 1703 to match with 3 outer wall of valve seat；The either side shape of the lower part of second support level 1703
At the locating groove 1702 to match with the A pipe 2.
According to Fig. 1, Fig. 9, Figure 10, Figure 14, when heretofore described 5 lower end surface of valve rod is in contact with the valve circle 6,
4 upper surface of guide sleeve and 9 lower end surface of internal magnetic ring are separated by, on the lower end surface of the outer magnetic ring 8 and the ring flange 7
702 upper surface of disk be separated by；Gap between the outer wall of the internal magnetic ring 9 and the inner wall of the disrance sleeve 13 is
0.1~0.5mm, the gap between the inner wall of the outer magnetic ring 8 and the outer wall of the disrance sleeve 13 are 0.01~0.1mm, institute
State outer magnetic ring 8 and the internal magnetic ring 9 be it is circular, the pole the N magnetic patch and the pole S magnetic patch of the outer magnetic ring 8 are evenly distributed on described outer
On 8 inner wall of magnet ring, the pole the N magnetic patch and the pole S magnetic patch of the internal magnetic ring 9 are evenly distributed on 9 outer wall of internal magnetic ring, the outer magnetic
The S pole field in N pole field and internal magnetic ring 9 in ring 8, the pole N in S pole field and the internal magnetic ring 9 in the outer magnetic ring 8
Magnetic field attracts each other；Number of magnetic pole pairs (the number of magnetic pole pairs: the pole N magnetic pole and the pole S magnetic pole of the internal magnetic ring 9 and the outer magnetic ring 8
For a pair) quantity be a pair or more, and quantity is equal.
The present invention is through the above technical solutions, the working principle to electric expansion valve is specifically described: passing through stepping electricity
Machine driving plate drives the stepper motor 15, and the stepper motor 15 drives the driving gear 16 to rotate, the driving gear
16 drive the driven gear 10, and the outer magnetic ring 8 is caused also the driven gear 10 to be followed to rotate, and the outer magnetic ring 8 passes through
Magnetic-coupled mode drives the internal magnetic ring 9 to rotate, and is connected together due to the valve rod 5 and the internal magnetic ring 9, finally
The valve rod 5 follows the internal magnetic ring 9 to rotate by the rolling screw 14 and the small steel ball 12.
Heretofore described magnetic coupling principle: the pole the N magnetic patch and the pole S magnetic patch of the outer magnetic ring 8 are evenly distributed on described
On outer magnetic ring 8, the pole the N magnetic patch and the pole S magnetic patch of the internal magnetic ring 9 are evenly distributed on the internal magnetic ring 9, in the outer magnetic ring 8
N pole field and internal magnetic ring 9 in S pole field, the N pole field in S pole field and the internal magnetic ring 9 in the outer magnetic ring 8
It attracts each other；(number of magnetic pole pairs: the pole N magnetic pole and the pole S magnetic pole are one to the number of magnetic pole pairs of the internal magnetic ring 9 and the outer magnetic ring 8
It is right) quantity be four pairs or four pairs or more, and quantity is equal.When the outer magnetic ring 8 rotation when, then the internal magnetic ring also by
The principle that anisotropy field mutually attracts follows the outer magnetic ring 8 to rotate.
On the one hand the electric expansion valve of anti-clamping stagnation proposed in the present invention is by the driving gear in the driving structure
16 and driven gear 10 reduction ratio (number of teeth/driving gear number of teeth of the reduction ratio=driven gear), further increase
The torque that the stepper motor 15 exports drives executive module to provide reliable guarantee for stepper motor 15；On the other hand it is
By valve rod 5, rolling screw 14 and the small steel ball 12 in the executive module, when electric expansion valve is in full off state, low pressure
Or the fluid of high pressure conditions is when entering valve inner, due to 13 inside of disrance sleeve with second on the valve rod 5 laterally
Side opening 505 communicates, and second transverse side holes 505 are communicated with second post holes 502, and due in sealed environment,
Fluid pressure is equal everywhere, and about 4 internal orifice dimension of guide sleeve is equal (i.e. forced area is equal).Therefore, the valve rod 5 is in flat
Weighing apparatus state.Again by the rolling between the rolling screw 14 and the small steel ball 12, the rolling screw 14 is in rotation process
In, the surface of the small steel ball 12 is very smooth, and the small steel ball 12 and the rolling screw 14 are point contacts, so that the small steel
Forced area very little between pearl 12 and the rolling screw 14, so that making the small steel ball 12 and the rolling screw
Frictional force very little between 14.The two aspects provide reliable guarantee for the anti-clamping stagnation of electric expansion valve.
Flow control accuracy proposed in the present invention is high, specifically by the valve rod 5 in the executive module, rolling
Screw rod 14 and small steel ball 12, the lateral annular groove 506 of 5 lower part of valve rod ensure that the fluid pressure that 5 lower part of valve rod is subject to
Surrounding is uniform, not by lateral effects of air pressure, the rolling screw 14 and small steel ball 12 is tangent and rolling screw 14 is upper and lower
When mobile, generation very close to each other provides reliable guarantee to improve flow control accuracy.
Through the foregoing embodiment, the high electronics of a kind of magnetic coupling proposed by the invention, anti-clamping stagnation, flow control accuracy is swollen
Swollen valve, it is on the one hand at low cost, on the one hand assemble simple, one side superior performance.
Above-described embodiment is simply to illustrate that technical concept and feature of the invention, its purpose is skill in the art
Art personnel can understand the contents of the present invention, and implement accordingly, and it is not intended to limit the scope of the present invention.All bases
The equivalent changes or modifications that the essence of the content of present invention is made, should all cover in protection scope of the present invention.
Claims (10)
1. a kind of electric expansion valve, including valve component, executive module and driving structure, the executive module are mounted on valve body group
Inside part, the executive module includes valve rod, rolling screw, small steel ball, swivel nut, internal magnetic ring, described in the rolling screw insertion
In first post holes of valve rod, the small steel ball is embedded in the first transverse side holes of the valve rod, and the small steel ball and the rolling
Dynamic screw rod is tangent；The swivel nut is inserted in the valve rod, and the inner wall of the swivel nut and a pair of small steel ball are tangent, the spiral shell
Set lower end surface is equipped with the internal magnetic ring to match with the valve rod；
The driving structure, including stepper motor, the stepper motor are driven by the driving gear on stepper motor output shaft
The driven gear being inserted on the disrance sleeve, then the interior magnetic in disrance sleeve is driven by the outer magnetic ring on the driven gear
Ring, so that the executive module be driven to rotate.
2. a kind of electric expansion valve according to claim 1, it is characterised in that: the valve component includes valve seat, the valve
The axial lower part of seat is connected together with B pipe, and the valve seat laterally links together with A pipe, and annular is formed inside the valve seat
Through slot, the annular through groove upper surface form step in valve seat, and the disk in the valve seat on step and ring flange is connected to one
It rises, the disk upper surface formation step circles, the disrance sleeve of the step circles and matching links together, the disk
Outer diameter it is bigger than the outer diameter of the step circles；The lower end surface of the annular through groove forms the circular groove to match with the guide sleeve.
3. a kind of electric expansion valve according to claim 2, it is characterised in that: formed and the valve rod phase inside the guide sleeve
Guide hole match, up and down forms the step to match with the ring flange mesoporous on the outer wall on the guide hole top；It is described to lead
Set lower part is equipped with the seal groove to match with valve circle, is axially connected below the guide hole with the seal groove；The guide sleeve be equipped with from
To the rectangular valve port of inner wall, the rectangular valve port is laterally connected outer wall with the guide hole lower part, the seal groove.
4. according to claim 1 or a kind of 3 electric expansion valves, it is characterised in that: formed below first post holes and institute
State the second small post holes of the first post holes described in the axial connected and interior boring ratio of the first post holes；At least a pair of first transverse side holes setting
On the top of first post holes；Lateral annular groove is formed at the lower part of second post holes, and the quantity of the lateral annular groove is at 6
Within, the second transverse side holes are formed at the top of second post holes；The top of second transverse side holes is formed and the interior magnetic
The positioning step column that ring matches, the height of the positioning step column and the height of first post holes are identical, or compare institute
The height for stating the first post holes is higher；First transverse side holes also are located at the top of the positioning step column；First post holes
It is that up and down, first post holes and first transverse side holes communicate, second column with second post holes
Hole and second transverse side holes communicate.
5. a kind of electric expansion valve according to claim 1, it is characterised in that: the internal magnetic ring is centrally formed up and down
Mesoporous, the internal magnetic ring are inserted in the positioning step column by the mesoporous；It is equipped with above the mesoporous of the internal magnetic ring and swivel nut
The guide groove bigger than normal than the valve rod outer diameter is arranged below in the swivel nut slot that outer diameter and height match, the mesoporous of the internal magnetic ring；It is described
The swivel nut is inserted in above positioning step column, the swivel nut and the positioning step column are close-fittings.
6. a kind of electric expansion valve according to claim 1, it is characterised in that: the rolling screw includes spiral shell handle, the spiral shell
The lower section of handle forms the helicla flute tangent with a pair of small steel ball, and formation matches with the spiral shell handle above the disrance sleeve
Welding hole, the position of the spiral shell handle are higher than the welding hole, and the top of welding hole described in the spiral shell handle is equipped with motor fixing frame plate.
7. a kind of electric expansion valve according to claim 1, it is characterised in that: the inner wall of the driven gear formed with it is described
The lower section of the first shaft hole that disrance sleeve outer wall matches, the first shaft hole is formed and the second of the outer magnetic ring outer wall phase close-fitting
Axis hole, the inside pore size of the outer magnetic ring and the pore size of the first shaft hole are identical；Second axis hole
The ring gear to match with the driving gear is formed on outer wall, the number of teeth of the ring gear is greater than the driving gear
The material of the number of teeth, the driven gear and the driving gear is metal or high temperature resistant, corrosion resistant high polymeric compound.
8. a kind of electric expansion valve according to claim 6, it is characterised in that: the motor fixing frame plate, including plectane and
Motor support plate, the plectane are equipped with the delthyrium to match with the spiral shell handle, the side of the plectane and the motor support plate
It is connected, the fixed stepper motor of screw hole that the motor support plate passes through the motor support plate；On the motor support plate
Equipped with the axle sleeve hole to match with stepper motor output shaft set；The motor fixing frame plate is fixed on the guard ring.
9. a kind of electric expansion valve according to claim 7, it is characterised in that: the guard ring is equipped with solid with the motor
Determine the first of frame plate matching and support interior step, described first supports interior step that dust-proof annular groove is arranged below, the dust-proof annular groove
The outer diameter of ring gear described in aperture ratio is bigger than normal, and the lower section of the dust-proof annular groove is equipped with second matched with the valve seat outer wall
Support step；The either side of the lower part of second support level forms the locating groove to match with the A pipe.
10. a kind of according to claim 1,3,5,7 any electric expansion valve, it is characterised in that: the valve rod lower end surface with
When the valve circle is in contact, the guide sleeve upper surface and the internal magnetic ring lower end surface are separated by, the lower end surface of the outer magnetic ring
It is separated by with the disk upper surface on the ring flange；The outer magnetic ring and the internal magnetic ring are circular, the outer magnetic rings
The pole N magnetic patch and the pole S magnetic patch be evenly distributed on the outer magnetic ring inner wall, the pole the N magnetic patch and the pole S magnetic patch of the internal magnetic ring are uniform
It is distributed on the internal magnetic ring outer wall, in the S pole field, the outer magnetic ring in the N pole field in the outer magnetic ring and internal magnetic ring
S pole field and the internal magnetic ring in N pole field attract each other；The number of magnetic pole pairs of the internal magnetic ring and the outer magnetic ring
Quantity be a pair or more, and quantity is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910617481.3A CN110230722B (en) | 2019-07-10 | 2019-07-10 | Electronic expansion valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910617481.3A CN110230722B (en) | 2019-07-10 | 2019-07-10 | Electronic expansion valve |
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| CN110230722A true CN110230722A (en) | 2019-09-13 |
| CN110230722B CN110230722B (en) | 2024-02-27 |
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| CN201910617481.3A Active CN110230722B (en) | 2019-07-10 | 2019-07-10 | Electronic expansion valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637271A (en) * | 2020-06-04 | 2020-09-08 | 李宏志 | Spiral stepping lifting type magnetic suspension valve |
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| JP2627868B2 (en) * | 1994-05-18 | 1997-07-09 | 太平洋工業株式会社 | Motorized valve |
| JP4749784B2 (en) * | 2005-07-19 | 2011-08-17 | 株式会社不二工機 | Motorized valve |
| JP4936941B2 (en) * | 2006-05-02 | 2012-05-23 | 株式会社不二工機 | Motorized valve |
| JP2008175240A (en) * | 2007-01-16 | 2008-07-31 | Fuji Koki Corp | Motor operated valve |
| JP5291477B2 (en) * | 2009-01-22 | 2013-09-18 | 株式会社不二工機 | Motorized valve |
| CN101956830B (en) * | 2009-07-17 | 2013-06-12 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN201810851U (en) * | 2010-08-04 | 2011-04-27 | 合肥瑞纳表计有限公司 | Electric valve |
| CN102213509B (en) * | 2011-06-02 | 2017-04-12 | 上海俊乐制冷自控元件有限公司 | Electronic expansion valve |
| JP2013040626A (en) * | 2011-08-11 | 2013-02-28 | Saginomiya Seisakusho Inc | Feeding mechanism of valve body of fluid control valve and fluid control valve using the same |
| CN102589071B (en) * | 2011-08-25 | 2014-03-19 | 奉政一 | Super-heat-conduction-transmission cooling and heating device |
| WO2014023014A1 (en) * | 2012-08-10 | 2014-02-13 | 浙江三花股份有限公司 | Electronic expanding valve |
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| CN202992195U (en) * | 2013-01-03 | 2013-06-12 | 中山市港利制冷配件有限公司 | Novel electronic expansion valve |
| CN203686165U (en) * | 2014-01-17 | 2014-07-02 | 浙江盾安禾田金属有限公司 | Large electronic expansion valve |
| CN106641430B (en) * | 2016-10-12 | 2024-04-26 | 诸暨市亿霸电子阀门有限公司 | Novel electronic expansion valve |
| CN106678421B (en) * | 2017-01-12 | 2024-02-02 | 诸暨市亿霸电子阀门有限公司 | Electronic expansion valve with flow control precision |
| CN109723830B (en) * | 2017-10-27 | 2022-09-09 | 浙江三花智能控制股份有限公司 | Electronic expansion valve and refrigeration system with same |
| CN211574369U (en) * | 2019-07-10 | 2020-09-25 | 诸暨市亿霸电子阀门有限公司 | Electronic expansion valve |
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| CN111637271A (en) * | 2020-06-04 | 2020-09-08 | 李宏志 | Spiral stepping lifting type magnetic suspension valve |
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| CN110230722B (en) | 2024-02-27 |
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