CN104791536A - Direct-acting type electric valve - Google Patents
Direct-acting type electric valve Download PDFInfo
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- CN104791536A CN104791536A CN201410026132.1A CN201410026132A CN104791536A CN 104791536 A CN104791536 A CN 104791536A CN 201410026132 A CN201410026132 A CN 201410026132A CN 104791536 A CN104791536 A CN 104791536A
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- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 8
- 230000004907 flux Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- VQAPWLAUGBBGJI-UHFFFAOYSA-N [B].[Fe].[Rb] Chemical compound [B].[Fe].[Rb] VQAPWLAUGBBGJI-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- 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
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a direct-acting type electric valve. The direct-acting type electric valve comprises a valve seat with a valve cavity, a motor and a lead screw, wherein the motor and the lead screw are mounted at the upper end of the valve seat. The lead screw is connected with a nut in a thread fit manner, and the nut is connected with a valve element; a rotor of the motor and the axial position of the valve seat are relatively fixed, and the upper end of the lead screw is fixedly connected with the rotor; the valve element is driven by the nut to move in the axial direction of the valve cavity to open or close a valve opening in the valve seat; the valve element is of cylindrical structure with a balance channel, and a sealing part for dividing the valve cavity into two independent cavity bodies is arranged on the periphery of the valve element. According to the structure, a gear system is eliminated, and unnecessary transmission is reduced; and friction losses are reduced, and the response is direct, reliable and sensitive. The rotor and the axial position of the valve seat are fixed, that is, in the working process, the opposite positions of the rotor and the coil component are fixed, so that driving force is stable; obviously, for the valve opening of the same size, the size of the motor in the scheme is smaller than that of a motor in the prior art, and the miniaturization large-capacity requirements can be met.
Description
Technical field
The present invention relates to fluid control component technical field, particularly relate to a kind of direct-driven motor-operated valve.
Background technique
The business air conditioner such as multi-connected machine or module machine, a multiple indoor set system of outdoor unit UNICOM, the refrigerant loop of each indoor set all needs install flow control valve, for cutting off refrigerant or adjust flux size.To the requirement of this flow control valve for can regulate any opening degree flow, having stable behavior, again because the refrigerant loop of each indoor set all needs install, so also need this flow control valve to meet miniaturization, jumbo requirement.
At present, described flow control valve many employings pilot-operated type control valve, utilizes motoring pilot valve, by main valve plug and this pilot valve opening and closing primary valve in linkage.But pilot-operated type control valve is when opening primary valve, opening area increases quickly, and flow sharply changes, and that is, pilot-operated type control valve cannot accurate flow adjustment.
In order to can fine adjustment cold medium flux, direct-acting type control valve can be adopted.Existing a kind of direct-acting type control valve, the output shaft of motor is connected with screw rod transmission by gear train, and screw mandrel is connected with nut by screw-thread fit, and nut is connected with spool, and nut is limited, can only slide axially along it, can not circumferentially rotate; During work, electric motor starting, its output shaft rotates, and passes to screw mandrel by gear train, and along with the rotation of screw mandrel, nut slides axially, thus band movable valve plug slides axially, and then realizes the object regulating valve port opening.
Due in the business air conditioner such as multi-connected machine or module machine, need the valve port area of flow control valve larger, thus the driving force needed is larger, according to above-mentioned direct-acting type control valve, for obtaining larger driving force, the size of motor must be caused to increase, make the volume of control valve excessive, not only increase cost, also make troubles to handling.
Existing another kind of direct acting control valve, the rotor of screw mandrel and motor is fixed, and by screw-thread fit attaching nut, and the lower end of screw mandrel directly coordinates with spool, nut and valve seat are fixed; During work, the rotor of motor drives screw mandrel to rotate, and because screw mandrel coordinates with nut thread, and nut is fixed, so rotor also can drive screw mandrel to move axially, thus band movable valve plug is opened or close port.But, during this kind of direct-acting type control valve work, because rotor axial moves, thus the axial centre position of rotor and coil component changes, the axial centre position of coil component cannot be remained at, and then reduction driving force, be the valve port of opening and closing larger caliber, also need the size increasing motor.
In view of this, how improving direct-acting type control valve, can, with the bigbore valve port of motor-driven valve core opening and closing of reduced size, be the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of direct-driven motor-operated valve, with the bigbore valve port of motor-driven valve core opening and closing of reduced size, thus miniaturization, jumbo requirement can be met.
For solving the problems of the technologies described above, the invention provides a kind of direct-driven motor-operated valve, comprising the valve seat with valve pocket, the motor being located at described valve seat upper end and screw mandrel; Described screw mandrel is connected with nut by screw-thread fit, and described nut is connected with spool; The rotor of described motor and the axial position of described valve seat are fixed, and the upper end of described screw mandrel is fixedly connected with described rotor, and described spool can move axially to open or close the valve port be located on described valve seat along described valve pocket under the drive of described nut; Described spool is the tubular structure with balance channel, and its periphery is provided with the Sealing described valve pocket being divided into two individual cavity.
As above design, during work, the coil component of motor drives rotor turns, because the axial position of rotor and valve seat is fixed, and screw mandrel is fixedly connected with rotor, so rotor only drives screw mandrel to rotate, the rotation of screw mandrel is converted into and moves axially by the nut coordinated with wire rod thread, thus drive spool to move axially, to open or close port; Said structure eliminates gear train, decreases unnecessary transmission, thus decreases power loss, responds directly reliable and sensitive; And the axial position of rotor and valve seat is fixed, namely the relative position of working procedure rotor and coil component is fixed, the driving force of motor can not moving axially and change with spool, and spool has balance channel, during valve opening, suffered resistance is less, obviously, for onesize valve port, the motor size of this programme is less compared to background technique, can meet miniaturization, jumbo requirement.
Preferably, described screw mandrel is fixed by annular connecting sheet and described rotor welding; The bore periphery of described annular connecting sheet extends to form protuberance vertically.
Preferably, described rotor is permanent magnet rotor; The external diameter of described rotor and the diameter ratio of described valve port are 0.8 ~ 1.8.
Preferably, described nut comprises the minor diameter part and large-diameter portion that coordinate with described wire rod thread;
The upper end of described spool has the receiving cavity holding described nut large-diameter portion, the inwall upper end of described receiving cavity offers the ring-shaped step of step surface towards described screw mandrel, it is arranged nut cover plate, to limit described nut and described spool relative position in the axial direction.
Preferably, the balance channel of described spool comprises described receiving cavity, the axial hole through with described receiving cavity and is located at the vent slot of described nut perisporium.
Preferably, the inwall lower end of described axial hole offers circular groove, is provided with filter screen in it.
Preferably, the bottom of described spool has axial bump, and on it, riveted joint has seal ring, and when described spool is in full off state, the lower end surface of described seal ring and the end face of described valve port are fitted to be formed and sealed.
Preferably, the longitudinal center line of described rotor overlaps with the longitudinal center line of the coil component of described motor.
Accompanying drawing explanation
Fig. 1 is the sectional drawing of a kind of embodiment of direct-driven motor-operated valve provided by the present invention, shows the structure that spool is in full-gear;
Fig. 2 is the sectional drawing of a kind of embodiment of direct-driven motor-operated valve provided by the present invention, shows the structure that spool is in full off state;
The balance channel structure of mangetic core assembly when Fig. 3 shows spool full off state;
Fig. 4 is the structural representation of upper valve base assembly in Fig. 1
Fig. 5 is the generalized section of upper valve base assembly in Fig. 1;
Fig. 6 is the plan view of Fig. 5;
Fig. 7 is the structural representation of mangetic core assembly in Fig. 1;
Fig. 8 is the generalized section of mangetic core assembly in Fig. 1;
Fig. 9 is the plan view of Fig. 8;
Figure 10 is the structural representation of valve seat core in Fig. 1;
Figure 11 is the structural representation of lower valve base in Fig. 1.
In Fig. 1-11:
Motor 10, coil component 11, rotor 12; Shell 20;
Valve seat 30, valve port 30a, upper valve base 31, path chamber 31a, large chamber, footpath 31b, step end face 31c, bearing 311, screw mandrel 312, lining 313, pad 314, annular connecting sheet 315, lower valve base 32, valve seat core 321, Flow-rate adjustment groove 321a, the first adapter 322, second adapter 323;
Nut 41, minor diameter part 41a, large-diameter portion 41b, vent slot 41c, nut cover plate 411, spool 42, upper limit cover 421, lower limit cover 422, seal ring 423, sliding aiding elements 423a, filter screen 424, seal ring 425.
Embodiment
Core of the present invention is to provide a kind of direct-driven motor-operated valve, with the bigbore valve port of motor-driven valve core opening and closing of reduced size, thus can meet miniaturization, jumbo requirement.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Here it should be noted that, the involved upper and lower noun of locality that waits is arranged in figure with component in Fig. 1 to Figure 11 and component position each other defines herein, clear and convenient just in order to expression technology scheme.Should be appreciated that the noun of locality adopted should not limit the scope of the application's request protection herein.
Please refer to Fig. 1-2, Fig. 1 is the sectional drawing of a kind of embodiment of direct-driven motor-operated valve provided by the present invention, shows the structure that spool is in full-gear; Fig. 2 is the sectional drawing of a kind of embodiment of direct-driven motor-operated valve provided by the present invention, shows the structure that spool is in full off state.
In this embodiment, direct-driven motor-operated valve comprises the valve seat 30 with valve pocket, the shell 20 be connected with valve seat 30, the motor 10 being located at valve seat 30 upper end and screw mandrel 312; Wherein, screw mandrel 312 is connected with nut 41 by screw-thread fit, and nut 41 is connected with spool 42; The rotor 12 of motor 10 is located in shell 20, and it is relative with the axial position of valve seat 30 fixing, coil component 11 is coated at shell 20, the upper end of screw mandrel 312 is fixedly connected with rotor 12, and spool 42 can move axially to open or close the valve port 30a be located on valve seat 30 along described valve pocket under the drive of nut 41; Wherein, spool 42 is for having the tubular structure of balance channel, and its periphery is provided with the Sealing described valve pocket being divided into two individual cavity.
As above design, during work, the coil component 11 of motor 10 drives rotor 12 to rotate, because the axial position of rotor 12 with valve seat 30 is fixed, and screw mandrel 312 is fixedly connected with rotor 12, so rotor 12 drive screw mandrels 312 rotate, with the nut 41 of screw mandrel 312 screw-thread fit the rotation of screw mandrel 312 is converted into and moves axially, thus band movable valve plug 42 moves axially, to open or close port 30a; Said structure eliminates gear train, decreases unnecessary transmission, thus decreases power loss, responds directly reliable and sensitive; And rotor 12 is relative with the axial position of valve seat 30 fixing, namely working procedure rotor 12 is fixed with the relative position of coil component 11, the driving force of motor 10 can not moving axially and change with spool 42, obviously, for onesize valve port 30a, compared with background technique, the motor size of this programme is less, can meet valve body miniaturization, jumbo requirement.
In preferred scheme, the longitudinal center line of rotor 12 overlaps with the longitudinal center line of coil component 11; Setting like this, the driving force that motor 10 can be made to provide maximizes.
In this embodiment, valve seat 30 comprises upper valve base 31 and lower valve base 32, and both are fixedly connected with; Wherein, valve port 30a is arranged at lower valve base 32.
Please also refer to the structural representation that Fig. 4-6, Fig. 4 is upper valve base assembly in Fig. 1; Fig. 5 is the generalized section of upper valve base assembly in Fig. 1; Fig. 6 is the plan view of Fig. 5.
As shown in the figure, upper valve base 31 comprises the path section and large footpath section of inserting rotor 12 inside, and screw mandrel 312 is fixedly connected with rotor 12 through the inner chamber of upper valve base 31.
In concrete scheme, screw mandrel 312 is welded and fixed with rotor 12 by annular connecting sheet 315; In the form of a ring, intermediate throughholes, can be coated at screw mandrel 312 to annular connecting sheet 315, and outside and the rotor 12 of annular connecting sheet 312 are welded and fixed, and ensures the join strength of screw mandrel 312 and rotor 12.
Further, the bore periphery of annular connecting sheet 315 extends to form protuberance vertically; So, this protuberance is set in screw mandrel 312, can increase the area of contact of annular connecting sheet 315 and screw mandrel 312, thus strengthen the join strength between screw mandrel 312 and rotor 12, guarantee that screw mandrel 312 can rotate under the drive of rotor 12.
In concrete scheme, annular connecting sheet 315 can be set to integrative-structure with rotor 12, is convenient to assembling.
The inner chamber of upper valve base 31 is divided into epicoele and cavity of resorption by annular slab, this annular slab can be set to one with upper valve base 31, bearing 311 is provided with in described epicoele, the inner ring of this bearing 311 and the periphery wall of screw mandrel 312 are fitted, the inwall of outer ring and described epicoele is fitted, so, screw mandrel 312 is relative with the axial position of upper valve base 31 fixing by bearing 311, thus rotor 12 is relative with the axial position of upper valve base 31 fixing, namely the said structure of upper valve base 31 determines the relative position of bearing 311, screw mandrel 312 and rotor 12 three.
Further, the upper end of bearing 311 is also provided with lining 313, and lining 313 is coated at screw mandrel 312, and is welded and fixed with screw mandrel 312, can prevent the inner ring of bearing 311 from throwing off with the outer ring of bearing 311 because being subject to axial force.Also can at the upper outside cover pad 314 of lining 313, pad 314 can weld with the upper end of upper valve base 31, mutually throws off with the inner ring and outer ring that prevent bearing 311 further.
Upper valve base 31, bearing 311, screw mandrel 312 and rotor 12 can be described as upper valve base assembly.
It is pointed out that and be above-mentionedly merely given as examples a kind of mode determining rotor 12 and valve seat 30 axial position, in reality, also fix by the axial position of other modes by rotor 12 and valve seat 30.
The thread section of screw mandrel 312 is positioned at the cavity of resorption of upper valve base 31, and described cavity of resorption comprises path chamber 31a and large footpath chamber 31b, and path chamber 31a is used for leading to the nut 41 be threaded with screw mandrel 312, and large footpath chamber 31b coordinates with the inner chamber of lower valve base 32 and forms valve pocket.
Please also refer to the structural representation that Fig. 7-Fig. 9, Fig. 7 are mangetic core assembly in Fig. 1; Fig. 8 is the generalized section of mangetic core assembly in Fig. 1; Fig. 9 is the plan view of Fig. 8.
Mangetic core assembly comprises nut 41 and spool 42, wherein, nut 41 comprises and the minor diameter part 41a of screw mandrel 312 screw-thread fit and large-diameter portion 41b, the upper end of spool 42 has the receiving cavity holding large-diameter portion 41b, the inwall upper end of described receiving cavity offers the ring-shaped step of step surface towards rotor 12, be provided with nut cover plate 411, to limit nut 41 and spool 42 relative position in the axial direction.
When rotor 12 rotates, drive screw mandrel 312 to rotate, and when driving nut 41 to move up, because the end of nut 41 large-diameter portion 41b and nut cover plate 411 interfere, thus movable valve plug 42 can be with to move up together, avoid nut 41 to depart from spool 42.
When rotor 12 rotates, drive screw mandrel 312 to rotate, and when driving nut 41 to move down, nut 41 directly can promote spool 42 and move down together, until close port 30a.
It is pointed out that the rotor 12 of motor 10 can rotate clockwise or rotate counterclockwise under the driving of coil component 11, thus can drive and nut 41 moves or moves down; When actual setting, when can be set as that rotor 12 rotates clockwise, drive on nut 41 and move, when rotor 12 rotates counterclockwise, drive nut 41 to move down; When can certainly be set as that rotor 12 rotates clockwise, drive nut 41 to move down, when rotor 12 rotates counterclockwise, drive on nut 41 and move.
The minor diameter part 41a of nut 41 stretches into the path chamber 31a of upper valve base 31 cavity of resorption, under the drive of screw mandrel 312, the minor diameter part 41a of nut 41 moves axially along described path chamber 31a, this path chamber 31a plays leading role to moving axially of nut 41, there is deflection when avoiding nut 41 to move axially, affect the sealability of spool 42 couples of valve port 30a.
Obviously, moving axially for guaranteeing that the rotation of screw mandrel 312 can be converted into by nut 41, to be with movable valve plug 42 to move axially, being also provided with bounding means, rotate with the circumference limiting nut 41.
The form that arranges of bounding means can for multiple, specific in the program, the minor diameter part 41a of nut 41 can be set to cross section is non-circular column structure, square column as shown in Figure 7, correspondingly, the path chamber 31a of upper valve base 31 and described square column adaptive.Certainly, when actual setting, also the minor diameter part 41a of nut 41 can be set to cross section is other non-circular column structures, as pentagon etc., path chamber 31a and its adaptation, also can arrange snap ring at the inwall of path chamber 31a, the endoporus of snap ring is set to non-circular, and the cross section that the minor diameter part 41a of nut 41 is set to coordinate with this snap ring is non-circular cylinder; In addition, can also arrange circumferential restraining groove in the bottom of described receiving cavity, the bottom of nut 41 large-diameter portion 41b is correspondingly arranged at the circumferential spacing preiection of circumferential restraining groove cooperation; Below only as several examples of the bounding means of restriction nut 41 circumference rotation.
Please also refer to the structural representation that Figure 10-11, Figure 10 is valve seat core in Fig. 1; Figure 11 is the structural representation of lower valve base in Fig. 1.
Be installed with valve seat core 321 in lower valve base 32, valve seat core 321 has core chamber, and its perisporium is provided with one or more Flow-rate adjustment groove 321a; Valve pocket is divided into the first cavity and the second cavity around the first cavity by valve seat core 321, and obviously, two cavitys are communicated with by Flow-rate adjustment groove 321a; Be appreciated that described first cavity is the core chamber of valve seat core 321; Wherein, the second cavity is communicated with the first adapter 322, and the first cavity is communicated with the second adapter 323 by valve port 30a.
In order to ensure in cold medium flux adjustment process, the stability under loading of valve seat core 321, multiple Flow-rate adjustment groove 321a can be evenly arranged along the perisporium of valve seat core 321.
Further, Flow-rate adjustment groove 321a can be set to the structure of circumferential lengths along the axially downward convergent of valve seat core 321, and as shown in Figure 10, this kind of structure can make the adjustment of the cold medium flux of small flow scope more accurate.Certainly, actual when arranging, Flow-rate adjustment groove 321a is set to other structures, and if square, circular or ellipsoidal structure are also feasible, just compared to aforementioned structure, the adjustment validity within the scope of small flow is lower.
The spool 42 be connected with nut 41 is located in valve pocket, particularly, be positioned at described first cavity, when spool 42 is in full off state, during close port 30a, the sidewall of spool 42 can shutoff Flow-rate adjustment groove 321a, thus cuts off being communicated with, when moving on spool 42 is under the drive of nut 41 of the first cavity and the second cavity, open Flow-rate adjustment groove 321a gradually, and change the circulation area of Flow-rate adjustment groove 321a, thus the first cavity is communicated with the second cavity, and regulate cold medium flux.Obviously, need between spool 42 and valve seat core 321 to keep sealing.
Composition graphs 3 is understood, in concrete scheme, the core chamber of valve seat core 321 is set to step hole, this step hole forms the step surface towards upper valve base 31, the upper end of valve seat core 321 is fitted with upper limit cover 421, the upper end of this upper limit cover 421 has the radial boss of annular, this radial boss is overlapped in the upper-end surface of valve seat core 321 towards upper valve base 31, so, namely the lower end surface of upper limit cover 421 forms mounting groove towards the madial wall of the end face of valve port 30a, valve seat core 12 and the step surface of above-mentioned valve seat core 321, can arrange seal ring 423 in this mounting groove.
Further, lower limit cover 422 can also be set between the step surface of seal ring 423 and described valve seat core 321.Because spool 42 is set to up-small and down-big structure usually, to guarantee the sealing to valve port 30a, for meeting the matching requirements of spool 42, between the path through hole of valve seat core 321 and spool 42, there is fit up gap.Lower limit cover 422 the existence can avoided due to fit up gap is set, seal ring 423 departs from described mounting groove in the to-and-fro motion of spool.
Further, the outer circumferential face of seal ring 423 is provided with sliding aiding elements 423a, sliding aiding elements 423a and seal ring 423 can be set to one, be coated on the periphery of seal ring 423, also can arrange separately by sliding aiding elements 423a; When there is pressure difference in described first cavity and described second cavity, pressure makes seal ring 423 extrusion-deformation, sliding aiding elements 423a is owing to being coated on the periphery of seal ring 423, the extruding force of seal ring 423 can be captured easily, thus fit with the periphery wall of spool 42, ensure sealing, simultaneously sliding aiding elements 423a the surface friction drag that can also reduce when spool 42 moves axially is set.
Described upper limit cover 421 also needs to keep relative between valve seat core 321 and fixes; In this embodiment, axial protuberance can be set in the bottom of the large footpath section of upper valve base 31, formed towards the annular table terrace of lower valve base 32, upper valve base 31 is plugged in lower valve base 32 by this axial protuberance, fit in the upper-end surface of its annular table terrace and lower valve base 32, and upper limit cover 421 is pressed in the upper-end surface of valve seat core 321 by the lower end of described axial protuberance; And this kind of vibrational power flow of upper valve base 31 is also easy to ensure the coaxality of itself and lower valve base 32.Certainly, also can fixed upper limit position cover 421 and valve seat core 321 by other means, as welding or the mode such as to be threaded.
When spool 42 is in full off state, also should guarantee the sealing between itself and valve port 30a.
In this embodiment, the bottom of spool 42 has axial bump, and on it, riveted joint has seal ring 425.When spool 42 is in full off state, the lower end surface of seal ring 425 and valve port 30a fit to be formed and seal.Obviously, the outer diameter of seal ring 425 is greater than the diameter of valve port 30a.
Further, the rotor 12 of the motor 10 of this direct-driven motor-operated valve is permanent magnet rotor, rubidium iron boron magnetic steel material or anisotropic ferrite material can be adopted particularly to make, so, when spool 42 is in full off state, motor 10 power-off, because rotor 12 is permanent magnet rotor, motor 10 has location torque in the power-off state, can guarantee the relative position between screw mandrel 312 and nut 41, avoids both slippages, therefore, under the state of motor 10 power-off, the sealing between spool 42 and valve port 30a can be guaranteed further, avoid interior leakage to occur.
In order to make motor 10 have certain location torque, the external diameter of rotor 12 and the diameter ratio of valve port 30a are preferably 0.8 ~ 1.8.
Further, spool 42 has the axial hole through with described receiving cavity, the perisporium of nut 41 has vent slot 41c, i.e. receiving cavity, the axial hole through with described receiving cavity described in the balance channel bag of spool 42 and be located at the vent slot 41c of nut 41 perisporium; So, when spool 42 is in full off state, the pressure balance of spool 42 upper and lower end, can understand by composition graphs 3, and Fig. 3 shows the structural representation of valve port full off state lower valve core assembly two-way pressure balance.As shown by arrows in FIG., second adapter 323 is communicated with the axial hole of spool 42 by valve port 30a, and the large footpath chamber 31b of upper valve base 31 is communicated with by the vent slot 41c of nut 41, the difference force that spool 42 is subject to is less, when opening valve port 30a, only need less driving force, namely just can drive larger spool 42, further by direct-driven motor-operated valve miniaturization with less motor 10.
Further, the inwall lower end of the axial hole of spool 42 offers circular groove, is provided with filter screen 424 in it; The setting of filter screen 424 avoids axial hole when refrigerant flows, impurity being brought into spool 42 and the screw thread causing screw mandrel 312 to coordinate with nut 41 is stuck.
In addition, the path chamber 31a of upper valve base 31 cavity of resorption of this direct-driven motor-operated valve and chamber, large footpath 31b connectivity part form the step end face 31c towards valve port 30a, and what the distance between this step end face 31c and valve port 30a defined spool 42 moves axially distance.As shown in Figure 1, when spool 42 is in full-gear, Flow-rate adjustment groove 321a standard-sized sheet, the first adapter 322 is communicated with the second adapter 323 by Flow-rate adjustment groove 321a, and now, the upper-end surface of spool 42 abuts with step end face 31c; As shown in Figure 2, when spool 42 is in full-shut position, its seal ring 425 is fitted to be formed with valve port 30a and is sealed, and the first adapter 322 is not communicated with the second adapter 323, and refrigerant circulation is completely cut-off.
This direct-driven motor-operated valve can realize two-way circulating, and composition graphs 1 and Fig. 2 understand, and the arrow in Fig. 1 and Fig. 2 indicates the flow direction of refrigerant; Wherein, solid arrow shows that refrigerant flows into from the first adapter 322, and the second adapter 323 is flowed out, and dotted arrow shows that refrigerant flows into from the second adapter 323, and the first adapter 322 is flowed out.
Above direct-driven motor-operated valve provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (8)
1. a direct-driven motor-operated valve, comprises the valve seat (30) with valve pocket, the motor (10) being located at described valve seat (30) upper end and screw mandrel (312); Described screw mandrel (312) is connected with nut (41) by screw-thread fit, and described nut (41) is connected with spool (42); It is characterized in that, the rotor (12) of described motor (10) is relative fixing with the axial position of described valve seat (30), the upper end of described screw mandrel (312) is fixedly connected with described rotor (12), and described spool (42) can move axially to open or close the valve port (30a) be located on described valve seat (30) along described valve pocket under the drive of described nut (41); Described spool (42) is for having the tubular structure of balance channel, and its periphery is provided with the Sealing described valve pocket being divided into two individual cavity.
2. direct-driven motor-operated valve as claimed in claim 1, is characterized in that, described screw mandrel (312) is welded and fixed by annular connecting sheet (315) and described rotor (12); The bore periphery of described annular connecting sheet (315) extends to form protuberance vertically.
3. direct-driven motor-operated valve as claimed in claim 1, it is characterized in that, described rotor (12) is permanent magnet rotor; The external diameter of described rotor (12) and the diameter ratio of described valve port (30a) are 0.8 ~ 1.8.
4. the direct-driven motor-operated valve as described in any one of claims 1 to 3, is characterized in that, described nut (41) comprises and the minor diameter part (41a) of described screw mandrel (312) screw-thread fit and large-diameter portion (41b);
The upper end of described spool (42) has the receiving cavity holding described nut large-diameter portion (41b), the inwall upper end of described receiving cavity offers the ring-shaped step of step surface towards described rotor (12), it is arranged nut cover plate (411), to limit described nut (41) and described spool (42) relative position in the axial direction.
5. direct-driven motor-operated valve as claimed in claim 4, is characterized in that, the balance channel of described spool (42) comprises described receiving cavity, the axial hole through with described receiving cavity and is located at the vent slot (41c) of described nut (41) perisporium.
6. direct-driven motor-operated valve as claimed in claim 5, it is characterized in that, the inwall lower end of described axial hole offers circular groove, is provided with filter screen (424) in it.
7. direct-driven motor-operated valve as claimed in claim 6, it is characterized in that, the bottom of described spool (42) has axial bump, on it, riveted joint has seal ring (425), when described spool (42) is in full off state, the lower end surface of described seal ring (425) and the end face of described valve port (30a) are fitted to be formed and are sealed.
8. direct-driven motor-operated valve as claimed in claim 7, it is characterized in that, the longitudinal center line of described rotor (12) overlaps with the longitudinal center line of the coil component (11) of described motor (10).
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410026132.1A CN104791536B (en) | 2014-01-20 | 2014-01-20 | A kind of direct-driven motor-operated valve |
| PCT/CN2015/071065 WO2015106724A1 (en) | 2014-01-20 | 2015-01-20 | Direct-action-type electrically-operated valve and assembly method therefor |
| KR1020167009203A KR101823927B1 (en) | 2014-01-20 | 2015-01-20 | Direct-action-type electrically-operated valve and assembly method therefor |
| KR1020187002550A KR101843460B1 (en) | 2014-01-20 | 2015-01-20 | Direct-action-type electrically-operated valve and assembly method therefor |
| EP15737429.9A EP3098494B1 (en) | 2014-01-20 | 2015-01-20 | Direct-action-type electrically-operated valve and assembly method therefor |
| EP18157478.1A EP3343080A1 (en) | 2014-01-20 | 2015-01-20 | Direct-action-type electrically-operated valve and assembly method therefore |
| US14/917,254 US10352467B2 (en) | 2014-01-20 | 2015-01-20 | Direct-action-type electrically-operated valve and assembly method therefor |
| JP2016524052A JP6219511B2 (en) | 2014-01-20 | 2015-01-20 | Direct-acting motor-operated valve and mounting method thereof |
| JP2017186257A JP6574467B2 (en) | 2014-01-20 | 2017-09-27 | Direct-acting motor-operated valve and mounting method thereof |
| US15/919,158 US20180202570A1 (en) | 2014-01-20 | 2018-03-12 | Direct-action-type electrically-operated valve and assembly method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410026132.1A CN104791536B (en) | 2014-01-20 | 2014-01-20 | A kind of direct-driven motor-operated valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104791536A true CN104791536A (en) | 2015-07-22 |
| CN104791536B CN104791536B (en) | 2017-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410026132.1A Active CN104791536B (en) | 2014-01-20 | 2014-01-20 | A kind of direct-driven motor-operated valve |
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| CN (1) | CN104791536B (en) |
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| CN107489776A (en) * | 2016-06-13 | 2017-12-19 | 株式会社不二工机 | Motor-driven valve |
| CN108730553A (en) * | 2017-04-17 | 2018-11-02 | 浙江三花汽车零部件有限公司 | A kind of motor-driven valve |
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| CN109695739A (en) * | 2017-10-24 | 2019-04-30 | 浙江盾安机械有限公司 | Direct-acting triple valve |
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| CN110296258B (en) * | 2018-03-23 | 2020-12-08 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
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| CN110296267A (en) * | 2018-03-23 | 2019-10-01 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN111365466A (en) * | 2018-12-25 | 2020-07-03 | 浙江盾安禾田金属有限公司 | Electronic expansion valve and air conditioning system using same |
| CN111379890A (en) * | 2018-12-30 | 2020-07-07 | 浙江三花智能控制股份有限公司 | Electromagnetic driving device and gas proportional valve with same |
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Effective date of registration: 20170126 Address after: 312500 Zhejiang city of Shaoxing province Xinchang County Chengguan town of Liquan Applicant after: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. Address before: 312500 Xinchang, Zhejiang province Qixing street under the village of Liquan Applicant before: ZHEJIANG SANHUA Co.,Ltd. |
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Effective date of registration: 20231110 Address after: 312500 Daming new area, Zhejiang Xinchang Economic Development Zone, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: Xiali Spring, Chengguan Town, Xinchang County Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |