CN106439211A - Valve rod assembly on electronic expansion valve - Google Patents
Valve rod assembly on electronic expansion valve Download PDFInfo
- Publication number
- CN106439211A CN106439211A CN201610889502.3A CN201610889502A CN106439211A CN 106439211 A CN106439211 A CN 106439211A CN 201610889502 A CN201610889502 A CN 201610889502A CN 106439211 A CN106439211 A CN 106439211A
- Authority
- CN
- China
- Prior art keywords
- valve rod
- valve
- electric expansion
- hole
- rod assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005984 hydrogenation reaction Methods 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 21
- 238000005516 engineering process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
-
- 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
Abstract
The invention discloses a valve rod assembly on an electronic expansion valve. The valve rod assembly comprises a valve rod and a bearing pedestal. The valve rod is arranged in a through hole of the bearing pedestal. The valve rod assembly is characterized by comprising a rod body, an inner axial hole column is formed at the middle and lower end of the rod body, a first transverse hole column communicated with the inner axial hole column is formed on the outer wall of the bottom of the inner axial hole column, and a second transverse shaft hole communicated with the through hole is formed in the middle of the wall body of the bearing pedestal. The valve rod assembly can eliminate axial pressure born by the valve rod, moreover, the good sealing effect is achieved, and meanwhile the cost is reduced to meet the market requirements.
Description
Technical field
The present invention relates to the valve rod assembly on a kind of electric expansion valve.
Background technology
At present, electric expansion valve both domestic and external is various in style, and architectural feature is each different, but their throttle structure is all
Similar, mainly cone valve structure.Valve rod within electric expansion valve, when axially moving toward fully closed direction, works as electronics
Needle within expansion valve is contacted with following valve opening, and valve rod starts to needle to produce an axial compressive force.Work as electronic expansion
Under full off state, produced axial compressive force reaches maximum to valve rod to valve each other, this is because needle is fully closed with needle
When under state, remain static, the spring of stem internal is subject to the downward pressure of valve rod, so that spring is compressed；Work as spring
Decrement to certain degree when, the pressure that needle is subject to reaches maximum；Meanwhile, the spring of stem internal produces to valve rod
A raw elastic force（The reverse axial compressive force that i.e. needle produces to valve rod）, now, between valve rod external screw thread and valve body internal thread
Frictional force becomes big.When air inlet pipe is passed through gases at high pressure, and when electric expansion valve descends in off position, valve opening is sealed by needle,
Now the high pressure of valve opening upper end is more than the low pressure of lower end, defines a positive differential pressure so that gases at high pressure create one to needle
Individual axial compressive force.Therefore, the generation of axial compressive force, leads between the internal valve rod external screw thread of electric expansion valve and valve body internal thread
Frictional force becomes big, more likely because the driving force that stepper motor produces is less than reaction torque, causes electric expansion valve clamping stagnation.
Valve rod assembly wherein on electric expansion valve, it, above connects for being driven as the vitals in electric expansion valve
Executing agency, carries movable valve plug to axially move, to realize valve switch and adjustment effect directly below.Valve rod is in electric expansion valve
In opening-closing process, not still movement parts, stressed member, and be also seal.
But the valve rod of conditional electronic expansion valve mainly has valve-rod body, needle, little steel ball, spring and other auxiliary zero
Part.This valve rod manufacturing process is complicated, cost of parts also to be increased.Moreover, the valve rod of electric expansion valve runs normal
In, on the one hand under electric expansion valve full off state, receive the reaction force that a needle produces to valve rod, be on the other hand
The axial compressive force to valve rod for the gas, which results in the frictional force that valve rod is subject to and increases, cause the abrasion of valve rod, shorten valve
The life-span of bar.
Traditional valve rod is to be mated with the slotted eye below needle by needle, and coupling only between the two is good,
Anti-leak just can be accomplished.The degree of cooperation that this is accomplished by between needle and slotted eye is high.The raising of degree of cooperation between the two, needs
Improve their required precision.Improve required precision, need to put into high cost.
In view of this, the present inventor proposes improvement with regard to this, there is provided the valve rod assembly on a kind of electric expansion valve, can not only
Eliminate the axial compressive force that valve rod is subject to, and accomplish good sealing effectiveness, reduces cost simultaneously, to meet the need on market
Ask.
Content of the invention
The invention aims to offer is a kind of can solve the problem that the weak point and technology referring in above-mentioned background technology
Valve rod assembly on the electric expansion valve of problem.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of valve rod assembly on electric expansion valve, including valve rod and bearing block, described valve rod is arranged in the through hole of bearing block,
It is characterized in that：Described valve rod includes the body of rod, and the middle lower end of the described body of rod forms interior axial hole post, at described interior axial hole post bottom
Form, on the outer wall in portion, the first horizontal hole post of communicating with described interior axial hole post, formed in the middle part of the wall body of described bearing block and
The second horizontal axis hole that described through hole communicates.
The present invention is done and arranges further, described first horizontal hole post is 2, on the same line.
The present invention is done and arranges further, described second horizontal axis hole is 2, on the same line.
The present invention is done and arranges further, described bearing block includes pedestal, form the through hole running through, institute in described pedestal
State through hole to match with described valve rod, form the internal thread segment matching with external thread section in the middle part of described through-hole wall.
The present invention is done and arranges further, described pedestal lower port inwall forms circular groove, in described pedestal lower port
Form waist type valve opening on outer wall, in described circular groove, be provided with polytetrafluoroethylene sealing gasket.
The present invention is done and arranges further, be provided with annular seal groove in the upper end of described waist type valve opening.
The present invention is done and arranges further, the upper end outer wall of described pedestal is provided with positioning hole groove.
The present invention is done and arranges further, be additionally included on the outer wall in the middle part of described interior axial hole post and form seal groove and ring
Groove.
The present invention is done and arranges further, described seal groove is 2, setting hydrogenation nitrile rubber is close on described seal groove
Seal or PEEK.
The present invention is done and arranges further, described annular groove is 2
Compared with the prior art, the present invention has following beneficial effect：
The present invention passes through to include valve rod and bearing block, passes through internal thread between the two and external screw thread is realized connecting, described valve rod bag
Include the body of rod, the middle lower end of the described body of rod forms interior axial hole post, on the outer wall in the middle part of described interior axial hole post formed seal groove and
Annular groove, forms, on the outer wall of described interior axial hole post bottom, the first horizontal hole post communicating with described interior axial hole post, in institute
State the second horizontal axis hole that in the middle part of the wall body of bearing block, formation is communicated, described first horizontal axis hole and described second with described through hole
Laterally axis hole is in same plane；The present invention communicates realization elimination valve rod by the first horizontal axis hole and the second horizontal axis hole and is subject to
Axial compressive force, when being passed through gas in electric expansion valve, no matter what state electric expansion valve be in, gas all can be from bearing
Second horizontal hole post of seat flows to, and then flows into the first horizontal hole post of valve rod, flow out from the interior axial hole post of valve rod it is achieved that
Electric expansion valve internal pressure is equal with the pressure of outlet side, eliminates the axial compressive force to valve rod for the gas.
The good sealing effectiveness of the anti-leak of electric expansion valve, is in full off state in electric expansion valve, by being enclosed within valve
The sealing ring of two seal grooves of bar, is contacted with the inwall of bearing block hole, blocks gas between bearing block and valve rod
Gap flow into that electric expansion valve is internal and the first horizontal hole post of valve rod, finally flow out, lead to quantity of gas leakage to increase.With this
In the same manner, on bearing block, the sealing ring of annular seal groove also prevent the increase of quantity of gas leakage.Close also by polytetrafluoroethylene (PTFE)
Coupling between packing and valve rod, eliminates gap between the two, effectively blocks gas by gap between the two, prevents
Stop quantity of gas leakage increase.
The raising of flow of electronic expansion valve control accuracy, particular by two annular grooves on valve rod, when being passed through gas,
Two annular groove surrounding constant voltages are it is therefore prevented that when valve rod is subject to air pressure, produce the pressure of a tendency.Increasing with valve opening pulse step number
Plus, the flow of gas is consequently increased, its linear state of rating curve.
From the foregoing, it will be observed that the present invention can solve the problem that the shortcomings of the prior art, valve rod can not only be eliminated and be subject to gas
Axial compressive force produced by body, reduces cost, to meet the demand on market.
Brief description
With reference to the accompanying drawings and detailed description the present invention is elaborated：
Fig. 1 is the structural representation of the valve rod assembly on electric expansion valve of the present invention.
Fig. 2 is the structural representation of valve rod in the present invention.
Fig. 3 is the profile in A-A direction in Fig. 2.
Fig. 4 is the structural representation of bottom bracket of the present invention.
Fig. 5 is the profile in B-B direction in Fig. 4.
Specific embodiment
Below by embodiment, and combine accompanying drawing, technical scheme is described in further detail.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, a kind of valve rod assembly on electric expansion valve, including valve rod 1 and bearing
Seat 2, described valve rod 1 is arranged in the through hole 21 of bearing block 2, forms external thread section 16 on the outer wall at the described body of rod 11 middle part,
Described bearing block 2 includes pedestal 23, forms through hole 21, described through hole 21 and described valve rod 1 phase running through in described pedestal 23
Join, form the internal thread segment 24 matching with external thread section 16 in the middle part of described through hole 21 inwall, pass through internal thread segment when mounted
24 are matched with external thread section 16, carry out screw thread rotation between the two and can carry out certain regulation, are gone up most by measuring bearing block
The distance between end and valve stem top, to determine the valve opening angle of electric expansion valve.
Heretofore described valve rod 1 includes the body of rod 11, and the middle lower end of the described body of rod 11 forms interior axial hole post 12, described
Form, on the outer wall of interior axial hole post 12 bottom, the first horizontal hole post 15 communicating with described interior axial hole post 12, in described bearing
Form the second horizontal axis hole 22 communicating with described through hole 21, described first lateral shaft after installation is complete in the middle part of the wall body of seat 2
Hole 15 and described second horizontal axis hole 22 are in same plane, are easy to the flowing stood up.When being passed through gas in electric expansion valve,
No matter what state electric expansion valve is in, gas all can flow to from the horizontal hole post of the second of bearing block 2 22, then flows into valve rod
1 the first horizontal hole post 15, flows out it is achieved that electric expansion valve internal pressure and outlet side from the interior axial hole post 12 of valve rod 1
Pressure equal, eliminate the axial compressive force to valve rod 1 for the gas.
Heretofore described first horizontal hole post 15 is 2, and on the same line, described second horizontal axis hole 22 is
2, on the same line, the outer wall at heretofore described interior axial hole post 12 middle part forms seal groove 13 and annular groove
14, described seal groove 13 is 2, setting hydrogenation nitrile rubber sealing ring or PEEK on described seal groove 13, these sealings
The setting of structure can eliminate gap between the two, effectively blocks gas by gap between the two it is therefore prevented that gas
Body leakage rate increases.Heretofore described annular groove 14 is 2, and when being passed through gas, two annular groove 14 surrounding constant voltages are it is therefore prevented that valve
When bar 1 is subject to air pressure, produce the pressure of a tendency.With the increase of valve opening pulse step number, the flow of gas is consequently increased,
Its linear state of rating curve.
Circular groove 25, shape on the outer wall of described pedestal 23 lower port are formed on heretofore described pedestal 23 lower port inwall
Become waist type valve opening 26, be provided with polytetrafluoroethylene sealing gasket in described circular groove 25, be provided with annular in the upper end of described waist type valve opening 26
Seal groove 27, the upper end outer wall of described pedestal 23 is provided with positioning hole groove 28, and this positioning hole groove 28 is used for spacing quiet spring.
Above-described embodiment simply to illustrate that the technology design of the present invention and feature, its objective is to be to allow in the art
Those of ordinary skill will appreciate that present disclosure and implements according to this, can not be limited the scope of the invention with this.All
It is equivalent change or the modification according to done by the essence of present invention, all should cover within the scope of the present invention.
Claims (10)
1. the valve rod assembly on a kind of electric expansion valve, including valve rod and bearing block, described valve rod is arranged on the through hole of bearing block
Interior it is characterised in that：Described valve rod includes the body of rod, and the middle lower end of the described body of rod forms interior axial hole post, in described interior axial hole
The the first horizontal hole post being communicated with described interior axial hole post, shape in the middle part of the wall body of described bearing block are formed on the outer wall of column bottom
Become the second horizontal axis hole communicating with described through hole.
2. according to claim 1 the valve rod assembly on a kind of electric expansion valve it is characterised in that：Described first horizontal hole post
For 2, on the same line.
3. according to claim 1 the valve rod assembly on a kind of electric expansion valve it is characterised in that：Described second horizontal axis hole
For 2, on the same line.
4. according to claim 1 the valve rod assembly on a kind of electric expansion valve it is characterised in that：Described bearing block includes seat
Body, forms the through hole running through in described pedestal, and described through hole is matched with described valve rod, in the middle part of described through-hole wall formed with
The internal thread segment that external thread section matches.
5. according to claim 4 the valve rod assembly on a kind of electric expansion valve it is characterised in that：Outside the upper end of described pedestal
Wall is provided with positioning hole groove.
6. according to claim 4 the valve rod assembly on a kind of electric expansion valve it is characterised in that：In described pedestal lower port
Form circular groove on wall, the outer wall of described pedestal lower port forms waist type valve opening, is provided with polytetrafluoroethylene (PTFE) in described circular groove close
Packing.
7. according to claim 6 the valve rod assembly on a kind of electric expansion valve it is characterised in that：In described waist type valve opening
Upper end is provided with annular seal groove.
8. the valve rod assembly on a kind of electric expansion valve according to any one in claim 1-7 it is characterised in that：Also wrap
Include and seal groove and annular groove are formed on the outer wall in the middle part of described interior axial hole post.
9. according to claim 8 the valve rod assembly on a kind of electric expansion valve it is characterised in that：Described seal groove is 2,
Setting hydrogenation nitrile rubber sealing ring or PEEK on described seal groove.
10. according to claim 8 the valve rod assembly on a kind of electric expansion valve it is characterised in that：Described annular groove is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889502.3A CN106439211B (en) | 2016-10-12 | Valve rod assembly on electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889502.3A CN106439211B (en) | 2016-10-12 | Valve rod assembly on electronic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106439211A true CN106439211A (en) | 2017-02-22 |
| CN106439211B CN106439211B (en) | 2024-04-26 |
Family
ID=
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327579A (en) * | 2017-04-10 | 2017-11-07 | 诸暨市亿霸电子阀门有限公司 | A kind of electric expansion valve |
| CN108644468A (en) * | 2018-05-31 | 2018-10-12 | 浙江懿康医疗科技有限公司 | A kind of wear-resisting needle being easily installed |
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| CN204403425U (en) * | 2014-12-31 | 2015-06-17 | 云南天创科技有限公司 | A kind of embolism formula liquid discharging valve |
| CN104847904A (en) * | 2015-05-26 | 2015-08-19 | 杨舟 | Pneumatic cut-off valve |
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| CN2637833Y (en) * | 2003-07-02 | 2004-09-01 | 浙江三花集团有限公司 | Electron expansion valve used for flow restriction prossure reducing and regualting flow quantity |
| US20060065870A1 (en) * | 2004-09-24 | 2006-03-30 | Denso Corporation | Flow control valve |
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| JP2010112539A (en) * | 2008-11-10 | 2010-05-20 | Cci Kk | Pressure balance type control valve |
| US20120305110A1 (en) * | 2010-04-30 | 2012-12-06 | Jun Zhou | Bidirectional pressure self-balancing stop valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327579A (en) * | 2017-04-10 | 2017-11-07 | 诸暨市亿霸电子阀门有限公司 | A kind of electric expansion valve |
| CN107327579B (en) * | 2017-04-10 | 2024-03-29 | 诸暨市亿霸电子阀门有限公司 | Electronic expansion valve |
| CN108644468A (en) * | 2018-05-31 | 2018-10-12 | 浙江懿康医疗科技有限公司 | A kind of wear-resisting needle being easily installed |
| CN108644468B (en) * | 2018-05-31 | 2019-12-10 | 浙江懿康医疗科技有限公司 | Wear-resisting valve needle convenient to installation |
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