CN105276205B - Motor-driven valve - Google Patents
Motor-driven valve Download PDFInfo
- Publication number
- CN105276205B CN105276205B CN201510378344.0A CN201510378344A CN105276205B CN 105276205 B CN105276205 B CN 105276205B CN 201510378344 A CN201510378344 A CN 201510378344A CN 105276205 B CN105276205 B CN 105276205B
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- Prior art keywords
- valve
- mentioned
- valve shaft
- shaft support
- motor
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- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003466 welding 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
- F16K1/32—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
- F16K1/02—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
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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
- 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
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
- F16K31/042—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves with electric means, e.g. for controlling the motor or a clutch between the valve and the motor
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/502—Mechanical actuating means with screw-spindle or internally threaded actuating means actuating pivotable 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/504—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating means being rotable, rising, and having internal threads which co-operate with threads on the outside of the valve body
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Lift Valve (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The present invention provides the motor-driven valve that the valve element that can make to move along the vertical direction is connected to valve seat with stable posture all the time.Motor-driven valve (10) possesses the feed screw mechanism (A) that the rotary motion of rotor (2) is transformed to linear motion, it is characterized in that, when the external diameter of the external thread part (4a) of valve shaft (4) to be set to C1, the lower end side of above-mentioned helical spring (27) be set into C2 relative to the internal diameter of the part of taking a seat of spring seat portions (32a), C1 ＜ C2.
Description
Technical field
The driving motor-driven valve of the stepper motor that is controlled the present invention relates to the refrigerant flow to freeze cycle etc..
Background technology
In the driving motor-driven valve of the stepper motor used as variable throttle valve, flow control valve etc., using by
The straight line that the rotary motion of the rotor of electro-motor is transformed to valve shaft by the feed screw mechanism that internal thread and external screw thread are formed is transported
It is dynamic, the opening and closing of valve (for example, patent document 1) is carried out relative to valve seat movement by the valve element for the lower section for making to be configured at valve shaft.
Conventional motor-driven valve 20A as Fig. 5 (A), Fig. 5 (B) expression.
In motor-driven valve 20A, it is formed from the external thread part 5 (movable threaded portion) of the periphery of valve shaft 3 and is formed at valve
The internal thread part 8 (fixed thread portion) of the inner circumferential of bracing strut 7 constitutes the feed screw mechanism 9 for valve shaft 3.Moreover, at this
In motor-driven valve 20A, the rotary motion of rotor 11 is transformed to the linear motion of valve shaft 3 using feed screw mechanism 9, and passes through this
The valve element 12 for the underface that linear motion makes to be configured at valve shaft 3 is contacted relative to valve seat 13, left, thus to fluids such as refrigerants
Flow be adjusted.
In addition, the upper portion of the valve element 12 at the position abutted with valve port 13a is integrally provided with the vavle shelf 12a of tubular.
However, in such motor-driven valve 20A, as enlarged representation in Fig. 6, on the top of the external thread part 5 of valve shaft 3
The shaft portion 3a of tubular of the side formed with specific length.
Also, valve shaft support 7 has tubular minor diameter part 7a in upper side, and has tubular large-diameter portion 7b in lower side.Separately
Outside, upper side tubular minor diameter part 7a inner peripheral surface bottom formed with internal thread part 8, and on inner peripheral surface top formed with tubular
Bearing portion 18.
So, due to being provided with bearing portion 18 in valve shaft support 7, so the inclination (waving) of valve shaft 3 can be suppressed.
As shown in Fig. 5 (A), the valve shaft support 7 being formed as described above is being formed as tubular in a manner of not revolvable
The docking section that the bottom 40a and valve chamber of the housing 40 of cup-shaped form the upper end 31a of part 31 is fixed.Also, valve shaft branch
The bottom of frame 7 is configured at valve chamber and formed in part 31.
In addition, in the input/output port 31b of axial bottom that part 31 is formed located at valve chamber, the first joint is connected with
17, and it is connected with the second joint 19 in the side of valve chamber formation part 31.Also, in input/output port 31b, that can not move
Dynamic mode is fixed with the valve guiding parts 341 of the substantially tubular penetrated along the vertical direction.In addition, in the valve guiding parts 34
Lower section be provided with valve seat 13.
Also, large-diameter portion 3b is provided with the bottom of valve shaft 3, and as enlarged representation in Fig. 5 (B), in the large-diameter portion
3b, which loosens, is embedded with valve element fixed component 56.
The valve element 12 taken a seat relative to valve seat 13, to disseat is by being presented the valve portion of the front of direct valve function and being configured at
The vavle shelf 12a of the tubular of the top of valve portion is formed.Moreover, it is fixed with the vavle shelf 12a of tubular in valve element fixed component 56.Also,
In the vavle shelf 12a integral with valve element 12, the helical spring 54 of compressive state and the spring seat member 55 of convex form are accommodated.
There is the active force from helical spring 54 in the spring seat member 55 effect.
Thus, if valve element 12 is connected to the valve port 13a for being formed at valve seat 13, and valve shaft 3 moves to valve closing direction, then spiral shell
Rotation spring 54 is compressed.Also, using spring force pressing valve element 12, so as to close valve port 13a.
However, in the motor-driven valve 20A of such structure, as shown in fig. 6, in the interior spiral shell of the inner circumferential located at valve shaft support 7
Bearing portion 18 of the top in line portion 8 formed with specific length.Moreover, when being screwed valve shaft 3 in the inner circumferential of valve shaft support 7,
The shaft portion 3a of valve shaft 3 is configured in bearing portion 18.In this condition, even if valve shaft 3 moves along the vertical direction, the axle of valve shaft 3
Part 3a is also disposed in bearing portion 18, so as to suppress the inclination of valve shaft 3 (waving), and is drawn along the vertical direction with stable posture
Pilot valve axle 3.
However, in such motor-driven valve 20A, the problem of following such is also easily produced.The problem is for example such as
The effective diameter of the external thread part 5 of valve shaft 3 be 2~3mm like that it is trickle in the case of easily produce.
That is, in conventional motor-driven valve 20A, as shown in Fig. 7 (A), Fig. 7 (B), when by the external diameter of the external thread part 5 of valve shaft 3
When being set to C1, the lower end side of helical spring 54 being set into C2 relative to the internal diameter of the part of taking a seat of spring seat portions, C1 is set to
＞ C2.
Due to being set to C1 ＞ C2 as described above relation, so under the tubular minor diameter part 7a of valve shaft support 7
End 7c including the extension ledge 41 extended to the lower section of valve shaft 3, there is connection until the spring seat member 55 of convex form
Continuing surface 55a imaginary space B be formed as with rounding frustum shape that diameter is tapered downward.
In addition, the feelings of cylinder (cylinder) equal with above and below diameter imaginary space B position of centre of gravity G
Condition is compared, and the height from continuing surface 55a is higher.
Therefore, if being set to C1 ＞ C2 relation, the difference of taking a seat of spring.That is, when helical spring 54 presses downwards
Valve shaft 3 and after being compressed, easily bend to the left and right.
So, in the case of the difference of taking a seat of helical spring 54, as shown in Fig. 5 (B), in valve closing, valve element 12 is with inclination
Posture be connected to valve seat 13 or valve element 12 and swung to the left and right in the midway abutted to valve seat 13.
In this case, exist the lower section for being configured at valve shaft 3 valve element 12 be obliquely connected to valve seat 13 or with
Unstable posture is connected to the problem of valve seat 13.In this case, correctly carried out using valve element 12 and valve seat 13
Flow control aspect produces problem.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Application Publication 2013-539849 publications
The content of the invention
Invent problem to be solved
In view of such conventional actual conditions, it is an object of the invention to provide the valve that can make to move along the vertical direction
Core is connected to the motor-driven valve of valve seat with stable posture all the time.
For realizing that the motor-driven valve 10 of the invention of above-mentioned purpose possesses：
Valve shaft support 6, it can not be rotated relative to the rotation of rotor 2 formed with internal thread part 6d and bearing portion 6e, and
It can not move along the vertical direction；
Valve shaft 4, its upper side peripheral part formed with external thread part 4a, and lower side peripheral part formed with tubular
Shaft portion 4b, integratedly rotated with above-mentioned rotor 2, and with the rotation and move along the vertical direction；
Feed screw mechanism A, it is by the external thread part 4a of above-mentioned valve shaft 4 and the internal thread part 6d structures of above-mentioned valve shaft support 6
Into；
The vavle shelf 25 of tubular, it is located at the bottom of above-mentioned valve shaft 4 in a manner of anticreep, and is integrally provided with valve element
32；
Helical spring 27, it enters in valve closing in the vavle shelf 25 of above-mentioned tubular to valve closing direction to above-mentioned valve element 32
Row force；And
Valve chamber forms part 70, and it is fixed as rotating by above-mentioned valve shaft support 6 and the valve shaft support 6 itself can not
Move along the vertical direction, be provided with seat portion 21 in the input/output port 14 located at the bottom of axial direction, and internally division has valve chamber
70a,
Said electric valve 10 is characterised by,
What above-mentioned valve shaft support 6 was integrally formed, also,
When by the external thread part 4a of above-mentioned valve shaft 4 external diameter be set to C1, by the lower end side of above-mentioned helical spring 27 relative to
When the internal diameter of spring seat portions 32a part of taking a seat is set to C2,
It is set to C1 ＜ C2.
According to the motor-driven valve of such structure, because the bending of helical spring is stable, so can make valve element not relative to
Valve seat is obliquely seated at valve seat.Thus, take a seat stability of the valve element relative to valve seat is improved.When being taken a seat thereby, it is possible to reduce
Fluid leakage, in addition can improve the durability of valve portion.
In addition, in the present invention,
It is preferred that the above-mentioned internal thread part 6d of above-mentioned valve shaft support 6 internal diameter D1 is set to the internal diameter than above-mentioned bearing portion 6e
D2 is small,
Above-mentioned valve shaft 4 is rotated while moving along the vertical direction, thus in above-mentioned valve with the rotation of above-mentioned rotor 2
When axle 4 moves from the top down or from bottom to top, above-mentioned feed screw mechanism A to be screwed length L constant.
According to the motor-driven valve of such structure, due to valve shaft can be guided along the vertical direction with stable posture all the time, institute
Can correctly carry out flow control.
In addition, in the present invention,
It is preferred that in the periphery sidepiece of above-mentioned valve shaft support 6, provided with the inner periphery side portion for being pressed into above-mentioned valve chamber and being formed part 70
Press-in portion 34,
Formed by the way that above-mentioned press-in portion 34 is pressed into above-mentioned valve chamber in part 70, part 70 is formed relative to above-mentioned valve chamber
Carry out the centering of above-mentioned valve element 32.
If being provided with press-in portion 34 in the periphery sidepiece of valve shaft support 6 like this, can simply and accurately carry out
Valve element 32 forms the centering of part 70 relative to valve chamber.Also, it is also simple due to constructing, so who can reliably be assembled
Operation.Moreover, it can be felt relieved using existing component parts, it is not required that using fixture, so as to energy compared with the past
Enough manufacturing costs for more suppressing motor-driven valve.
Herein, in the present invention, the effective diameter of the external thread part of above-mentioned valve shaft 4 can also be 2~3mm.
So, the present invention can be corresponding with the pathization of valve shaft 4.
The effect of the present invention is as follows.
According to the motor-driven valve of the present invention, because the bending of helical spring is stable, so valve element can be made not relative to valve seat
Valve seat is obliquely seated at, thus improves take a seat stability of the valve element relative to valve seat.Further, it is possible to reduce fluid when taking a seat
Leakage, in addition can improve the durability of valve portion.
Also, seal of the motor-driven valve of present invention when can aid in valve closing and contribute to downsizing, for example, even if valve
The effective diameter of the external thread part of axle is that 2~3mm can also be applied well.
Brief description of the drawings
Fig. 1 is the sectional view for the preferable embodiment for representing the motor-driven valve of the present invention.
Fig. 2 is the schematic diagram of the valve shaft and the assembling morphology of valve shaft support shown in enlarged representation Fig. 1.
Fig. 3 (A), Fig. 3 (B) are the sectional views for representing valve shaft and the assembling morphology of valve shaft support shown in Fig. 1.
Fig. 4 (A), Fig. 4 (B) are intended to indicate that the diagrammatic cross-sectional view of the shape of the helical spring of the motor-driven valve shown in Fig. 1.
Fig. 5 (A) is the sectional view of conventional motor-driven valve, and Fig. 5 (B) is Fig. 5 (A) partial enlarged drawing.
Fig. 6 is assembling shape of the valve shaft with valve shaft support of the conventional motor-driven valve shown in enlarged representation Fig. 5 (A), Fig. 5 (B)
The schematic diagram of state.
Fig. 7 (A) is the sectional view for the relation for representing helical spring and valve shaft in conventional motor-driven valve, and Fig. 7 (B) is to represent
The schematic diagram of the profile of helical spring shown in Fig. 7 (A).
In figure：
2-rotor, 2a-limiting section, 4-valve shaft, 4a-external thread part, 4b-shaft portion, 4c-reducing diameter part, 6-valve shaft
Support, 6a-tubular minor diameter part, 6b-tubular large-diameter portion, 6c-bottom, 6d-external thread part, 6e-bearing portion, 6f-convex
Edge, 6g-upper end opening portion, 6h-limiting section, 10-motor-driven valve, 14-input/output port, 21-seat portion, 25-vavle shelf,
27-helical spring, 32-valve element, 32a-spring seat portions, 33-sleeve part, the 37-the second joint, the 38-the first joint,
50-valve shaft assembly, 60-housing, 60a-bottom, 70-valve chamber formation part, 70a-valve chamber, 70b-upper end,
83-valve shaft support room, A-feed screw mechanism.
Embodiment
Hereinafter, the preferred embodiment of the present invention is illustrated referring to the drawings.
Fig. 1 is the sectional view for the motor-driven valve for representing the preferred embodiment of the present invention, and Fig. 2 is to represent the electricity shown in Fig. 1
The schematic diagram of valve shaft and the assembling morphology of valve shaft support in dynamic valve.
In addition, in this specification, " on " or " under " is the presence with Fig. 1.
In the motor-driven valve 10, by non magnetic system and be formed as under the open side of housing 60 of the cup-shaped of tubular
End, by welded it is connected with valve chamber and forms part 70.
Formed in valve chamber in the valve chamber 70a of part 70, the first joint 38 is connected in lower section (axial direction), second is connected in side
Joint 37, the top that the input/output port 14 of part 70 is formed in the valve chamber being connected with the first joint 38 are provided with seat portion 21.
In addition, the seat portion 21 is the parts different from being configured at the valve chamber formation part 70 of the lower end side of housing 60, but
Seat portion 21 can also be formed directly into valve chamber and form part 70.
The rotor 2 that can be rotated is accommodated in the inner circumferential of housing 60.
In the periphery of housing 60, the stator (not shown) being made up of yoke portion, bobbin and coil etc. is configured with, by turning
Son 2 and stator constitute stepper motor.
Also, between the bottom 60a and valve chamber of housing 60 form the upper end of part 70, it is fixed with and is internally formed
There is the valve shaft support 6 of the tubular of through hole, the valve shaft support 6 is fixed to form part relative to valve chamber via its flange part 6f
70 can not rotate against.The single part that the valve shaft support 6 is integrally formed, it is preferably integrally formed by appropriate resin.The valve
Bracing strut 6 has the inclined function of suppressing valve shaft 4 described later.
Above-mentioned valve shaft support 6 by the tubular minor diameter part 6a of upper side, lower side tubular large-diameter portion 6b, be pressed into valve chamber shape
The flange part 6f of press-in portion 34 and ring-type into the inner periphery side portion of part 70 is formed.
Although not shown, but valve shaft support 6 press-in portion 34 in the tubular large-diameter portion 6b of valve shaft support 6 periphery sidepiece to advise
Surely it is provided with being spaced apart multiple.In the present embodiment, it is provided with press-in portion 34 at four positions with being circumferentially separated, but it is not special
Four positions are not defined to, such as can also be two positions in the case where being set every 180 ° of angle.But work as
In the case of being provided with press-in portion 34 every two positions of 180 ° of angles, valve shaft support 6 is pressed into when forming part 70 to valve chamber
When, there is valve shaft support 6 to offset and form the oblique inclined worry of part 70 relative to valve chamber.Thus, in order to further reliably
The standing valve bracing strut 6 of part 70 is formed in valve chamber, preferably in three position arrangement above press-in portion 34.If like this at three
Position arrangement above press-in portion 34, then when relative to valve chamber formed part 70 be pressed into valve shaft support 6 when, without valve shaft support 6 to
The worry all around offset, so as to reliably be felt relieved.
In addition, the periphery of the tubular minor diameter part 6a in valve shaft support 6, is guided formed with the limiting section 2a to rotor 2
Helicla flute.In addition, the side of the tubular large-diameter portion 6b in valve shaft support 6, is provided through balancing orifice 51, the balancing orifice 51 is real
The pressure being now formed between the valve shaft support room 83 of the inside of valve shaft support 6 and the exterior space of valve shaft support 6.Pass through setting
Such balancing orifice 51, thus swimmingly carry out the shift action of valve shaft support 6.
In addition, in the valve shaft support 6, depth as defined in the inner circumferential side upper opening portion 6g directions from tubular minor diameter part 6a
Internal thread part 6d formed below, in internal thread part 6d bearing portion 6e formed below, bearing portion 6e does not form screw thread
Groove.The inclination (waving) of valve shaft 4 described later is prevented using bearing portion 6e.
In the axial portions of rotor 2, valve shaft 4 is configured with via the insertion of sleeve part 33.The major part installation of valve shaft 4
In the inner side of valve shaft support 6, the valve shaft 4 integratedly rotates with rotor 2.Valve shaft 4 upper side peripheral part formed with outer spiral shell
Line portion 4a, and from external thread part 4a downwards across reducing diameter part 4c lower side formed with shaft portion 4b.
Moreover, it is formed from the external thread part 4a of the periphery of valve shaft 4 and is formed at the internal thread part of the inner circumferential of valve shaft support 6
6d constitutes feed screw mechanism A.
Also, it is configured with tubular on the inside of the lower end side in valve shaft 4 and the tubular large-diameter portion 6b in valve shaft support 6
Vavle shelf 25, the upper end side of the vavle shelf 25 by it is stamping and bending be approximate right angle.Vavle shelf 25 utilizes the convex of the bending
Edge and realize the anticreep for valve shaft 4.Moreover, in vavle shelf 25, the helical spring 27 and spring base that have compressed are accommodated
35.Also, valve element 32 is fixed with by welding etc. in the lower end of vavle shelf 25.
Moreover, in the motor-driven valve 10, the conduct such as valve shaft 4, vavle shelf 25, spring base 35, helical spring 27 and valve element 32
One valve shaft assembly 50 and form.In addition, the valve element 32 located at the bottom of vavle shelf 25 can carry out axial direction relative to valve shaft 4
Relative movement and rotate against.
In addition, the effective diameter of the external thread part of valve shaft 4 in present embodiment is 2~3mm.
Also, the opening diameter of seat portion 21 is 0.5~4.5mm, feed screw mechanism A be screwed length L be 2~
10mm。
Hereinafter, the action of the motor-driven valve 10 to forming as described above illustrates.
When closing motor-driven valve 10, by give pulse signal to coil (not shown) make rotor 2 to overlook when it is suitable
Clockwise is rotated, while because of feed screw mechanism A effect, valve shaft 4 is also rotated while declining, and valve element 32 is inserted into
In seat portion 21.Behind the assigned position that valve element 32 is inserted into valve seat formation part 70, rotor 2 further rotates and valve element 32
Mutually abutted with seat portion 21, in this condition, the limiting section 2a of rotor 2 is connected to the limiting section 6h of valve shaft support 6, mandatory
Ground stops the decline of valve shaft 4, so as to which the posture acted with Fig. 1 terminates.
On the other hand, in the case where opening motor-driven valve 10, if for example, being given in the state of Fig. 1 makes rotor 2 to the inverse time
The pulse signal that pin direction rotates, and rotor 2 rotates counterclockwise, then at the same time, valve shaft 4 also rotates rising, so as to
Valve element 32 leaves and the valve opening of motor-driven valve 10 from seat portion 21.
In the motor-driven valve 10 of present embodiment of action as described above is carried out, in order that being configured at the lower section of valve shaft 4
Valve element 32 seat portion 21 is connected to stable posture all the time, and employ following structure.
That is, the bearing portion 6e of valve shaft support 6 is arranged on tubular minor diameter part 6a bottom side, the external thread part 4a of valve shaft 4
It is arranged on tubular minor diameter part 6a upper side.
So, if bearing portion 6e is arranged on tubular minor diameter part 6a bottom side, and the external thread part 4a of valve shaft 4 is set
In tubular minor diameter part 6a upper side, then the rocking tendency of valve shaft 4 can be reduced.
Also, the internal thread part 6d of valve shaft support 6 internal diameter D1 is set to the internal diameter of the bearing portion 6e than valve shaft support 6
D2 is small.
So, if being set as D1 ＜ D2, the feed screw mechanism A length L that is screwed can be set to constant all the time
Length.
So, in the motor-driven valve 10 for carrying out flow control, as described above, Fig. 3 (A) of state when representing valve closing and
In Fig. 3 (B) of state when representing valve opening, feed screw mechanism A to be screwed length L constant all the time.That is, at such as Fig. 3 (A)
After moving downwards to the shown maximum limit of valve shaft 4, after being moved upward to the maximum limit of valve shaft 4 shown in such as Fig. 3 (B), by
It is screwed in whole regions of the external thread part 4a throughout the internal thread part 6d of valve shaft support 6, so being screwed the length L beginnings
It is constant eventually.
Also, in the motor-driven valve 10 of such structure, as shown in figure 4, the external thread part 4a of valve shaft 4 external diameter C1 is set
It is set to smaller relative to the internal diameter C2 of spring seat portions 32a part of taking a seat than the lower end side of helical spring 27.If it is set as like this
C1 ＜ C2, then the rocking tendency of valve shaft 4 tail off.
Also, if it is set as C1 ＜ C2, in the case of imaginary space B rounding frustum shapes of the position of centre of gravity G than Fig. 7
Position of centre of gravity G it is low, become good so as to taking a seat for spring.
Thus, the valve element 32 shown in Fig. 1 is connected to seat portion 21 or away from seat portion 21 with stable posture all the time,
So it can correctly carry out flow adjustment.
Also, in motor-driven valve 10, feed screw mechanism A position does not contact with valve shaft support room 83, but is located at valve
The top of bracing strut room 83.
Thus, in this case, rubbish etc. has been mixed into fluid, its insertion screw thread has been also prevented from and enters
Give mechanism A.Thus, the adjustment generation of valve opening will not be caused not smooth.
Helical spring 27 take a seat it is good in the case of, play following effect.
If that is, helical spring 27 take a seat it is good, as shown in figure 1, valve element 32 will not tilt or valve element 32 in valve closing
It will not to the left and right swing, valve element 32 can be made to be taken a seat with stable posture.Thereby, it is possible to prevent leakage of fluid etc..
Thus, in the motor-driven valve 10 for possessing such helical spring 27, valve element 32 can be made all the time with stable posture
Seat portion 21 is connected to or away from seat portion 21, so as to correctly carry out flow adjustment.
More than, the preferred embodiment of the present invention is illustrated, but the present invention is not limited to this.
For example, in the above-described embodiment, valve shaft 4, vavle shelf 25, spring base 35, helical spring 27 and valve element 32 etc. are made
Formed for a valve shaft assembly 50, but the locking mechanism of valve element 32 can also be other structures.
Also, the present invention can be the situation of path as 2~3mm in the external thread part 4a of valve shaft 4 effective diameter
Lower application, the diameter that can also apply to certainly more than herein.
In addition, can be effective in the case of being 0.5~4.5mm in the opening diameter of seat portion 21, but can also answer certainly
For diameter in addition.
Claims (5)
1. a kind of motor-driven valve (10), possesses：
Valve shaft support (6), it can not be rotated relative to the rotation of rotor (2) formed with internal thread part (6d) and bearing portion (6e),
And it can not move along the vertical direction；
Valve shaft (4), its upper side peripheral part formed with external thread part (4a), and lower side peripheral part formed with axle portion
Divide (4b), integratedly rotated with above-mentioned rotor (2), and moved along the vertical direction with the rotation；
Feed screw mechanism (A), it is by the external thread part (4a) of above-mentioned valve shaft (4) and the internal thread part of above-mentioned valve shaft support (6)
(6d) is formed；
The vavle shelf (25) of tubular, it is located at the bottom of above-mentioned valve shaft (4) in a manner of anticreep, and is integrally provided with valve element
(32)；
Helical spring (27), it is in the vavle shelf (25) of above-mentioned tubular, in valve closing to valve closing direction to above-mentioned valve element (32)
Exerted a force；And
Valve chamber formed part (70), its by above-mentioned valve shaft support (6) be fixed as rotating and also the valve shaft support (6) itself not
It can along the vertical direction move, be provided with seat portion (21) in the input/output port (14) located at the bottom of axial direction, and internally divide
There is valve chamber (70a),
Said electric valve (10) is characterised by,
What above-mentioned valve shaft support (6) was integrally formed, also,
When the external diameter of the external thread part (4a) of above-mentioned valve shaft (4) is set into the C1, lower end side of above-mentioned helical spring (27) is relative
When internal diameter in the part of taking a seat of spring seat portions (32a) is set to C2,
C1 ＜ C2 are set to,
Above-mentioned feed screw mechanism (A) is contacted with the valve shaft support room (83) of the not inside with being formed at above-mentioned valve shaft support (6)
Mode be located at the top of above-mentioned valve shaft support room.
2. motor-driven valve according to claim 1, it is characterised in that
The internal diameter (D1) of the above-mentioned internal thread part (6d) of above-mentioned valve shaft support (6) is set to the internal diameter than above-mentioned bearing portion (6e)
It is (D2) small,
Above-mentioned valve shaft (4) is rotated while moving along the vertical direction, thus in above-mentioned valve with the rotation of above-mentioned rotor (2)
When axle (4) moves from the top down or from bottom to top, above-mentioned feed screw mechanism (A) to be screwed length (L) constant.
3. motor-driven valve according to claim 1 or 2, it is characterised in that
In the periphery sidepiece of above-mentioned valve shaft support (6), the pressure provided with the inner periphery side portion for being pressed into above-mentioned valve chamber formation part (70)
Enter portion (34),
Formed by the way that above-mentioned press-in portion (34) is pressed into above-mentioned valve chamber in part (70), part is formed relative to above-mentioned valve chamber
(70) centering of above-mentioned valve element (32) is carried out.
4. motor-driven valve according to claim 1 or 2, it is characterised in that
The external diameter of the external thread part (4a) of above-mentioned valve shaft (4) is 2~3mm.
5. motor-driven valve according to claim 3, it is characterised in that
The external diameter of the external thread part (4a) of above-mentioned valve shaft (4) is 2~3mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014147984A JP6270650B2 (en) | 2014-07-18 | 2014-07-18 | Motorized valve |
| JP2014-147984 | 2014-07-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105276205A CN105276205A (en) | 2016-01-27 |
| CN105276205B true CN105276205B (en) | 2017-12-29 |
Family
ID=55145732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510378344.0A Active CN105276205B (en) | 2014-07-18 | 2015-07-01 | Motor-driven valve |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6270650B2 (en) |
| CN (1) | CN105276205B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6676432B2 (en) * | 2016-03-28 | 2020-04-08 | 株式会社不二工機 | Electric valve and method of assembling the same |
| JP6523200B2 (en) * | 2016-03-31 | 2019-05-29 | 株式会社鷺宮製作所 | Motorized valve |
| JP6599838B2 (en) * | 2016-10-11 | 2019-10-30 | Ｃｋｄ株式会社 | Wear type manual on-off valve |
| JP2018076932A (en) * | 2016-11-10 | 2018-05-17 | 株式会社鷺宮製作所 | Motor-operated valve and refrigeration cycle system |
| JP6691064B2 (en) * | 2017-01-25 | 2020-04-28 | 株式会社鷺宮製作所 | Motorized valve and refrigeration cycle system |
| JP6726124B2 (en) * | 2017-03-23 | 2020-07-22 | 株式会社鷺宮製作所 | Motorized valve and refrigeration cycle system using the same |
| JP6762036B2 (en) * | 2018-01-17 | 2020-09-30 | 株式会社不二工機 | Solenoid valve |
| JP7144994B2 (en) * | 2018-07-19 | 2022-09-30 | 株式会社鷺宮製作所 | Electric valve and refrigeration cycle system |
| CN110966426B (en) * | 2018-09-30 | 2022-08-26 | 浙江三花汽车零部件有限公司 | Expansion valve |
| EP3671073A1 (en) | 2018-12-20 | 2020-06-24 | Danfoss A/S | Electric expansion valve |
| WO2020259658A1 (en) * | 2019-06-28 | 2020-12-30 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| JP7254678B2 (en) * | 2019-10-28 | 2023-04-10 | 株式会社鷺宮製作所 | Electric valve and refrigeration cycle system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4612377B2 (en) * | 2004-09-17 | 2011-01-12 | 株式会社不二工機 | Motorized valve |
| JP2008169910A (en) * | 2007-01-11 | 2008-07-24 | Fuji Koki Corp | Motor-operated valve |
| JP4679613B2 (en) * | 2008-08-04 | 2011-04-27 | 株式会社鷺宮製作所 | Motorized valve |
| JP5291477B2 (en) * | 2009-01-22 | 2013-09-18 | 株式会社不二工機 | Motorized valve |
| EP3062004B1 (en) * | 2009-01-22 | 2017-08-16 | Fujikoki Corporation | Motor-driven valve |
| JP5424919B2 (en) * | 2010-02-05 | 2014-02-26 | 株式会社不二工機 | Motorized valve |
| CN102853086B (en) * | 2011-07-01 | 2014-05-14 | 浙江三花股份有限公司 | Electrically operated valve device |
| JP5943549B2 (en) * | 2011-02-24 | 2016-07-05 | 株式会社不二工機 | Motorized valve |
-
2014
- 2014-07-18 JP JP2014147984A patent/JP6270650B2/en active Active
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2015
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2016023711A (en) | 2016-02-08 |
| CN105276205A (en) | 2016-01-27 |
| JP6270650B2 (en) | 2018-01-31 |
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