CN101526150A - Electronic expansion valve and method for processing same - Google Patents
Electronic expansion valve and method for processing same Download PDFInfo
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- CN101526150A CN101526150A CN200810059943A CN200810059943A CN101526150A CN 101526150 A CN101526150 A CN 101526150A CN 200810059943 A CN200810059943 A CN 200810059943A CN 200810059943 A CN200810059943 A CN 200810059943A CN 101526150 A CN101526150 A CN 101526150A
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- screw thread
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- electric expansion
- expansion valve
- protective film
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Abstract
The invention provides an electronic expansion valve, and belongs to a fluid control element. In the prior art, the defects of difficult use of various refrigerants and a high-load pressure system exist in a screw thread surface treatment layer. A valve body is provided with fixing threads; the inside of a valve body cavity is provided with a multipolar magnetic rotor; the rotor is provided with rotary threads matched with the fixing threads; and the fixing threads and the rotary threads form a transmission thread pair which can relatively and accurately rotate and are characterized in that at least one surface of the fixing threads and the rotary threads is coated with at least one layer of carbon atom containing protection film on purpose. By the valve, the service life of the product can be prolonged by several times to more than ten times. The valve has perfect wearing proof property, quite good chemical stability and wide refrigerant medium resistant property, and has no stress on temperature change. Even if the electric expansion valve works under severe conditions, namely under working environments of high load or oil break, insufficient oil and in various refrigerant medias, the valve can also keep wide applicability and reliability.
Description
Technical field
The invention belongs to fluid control elements, a kind of specifically structure and processing method thereof of regulating the electric expansion valve that flow uses.
Background technique
Regulate the electric expansion valve that flow is used, comprise valve body and electromagnetic coil, wherein valve body comprises outer cover and the valve seat that is connected the outer cover bottom, between outer cover and valve seat, form the valve body chamber, the valve body chamber is built-in with a multi-polar magnetic rotor, be provided with the needle that cooperates with the valve port of valve seat by the multi-polar magnetic rotor driven, electromagnetic coil is enclosed within outside the outer cover; In addition, valve body is provided with retaining thread, and rotor is provided with the rotation screw thread supporting with described retaining thread, described retaining thread with rotate screw thread form one can relative accurate turn the motion thread pair.This structure is served as stator, is served as rotor by the multi-polar magnetic rotor and promptly constituted stepper motor by electromagnetic coil.When system works, electronic controller is by sending pulse signal to electromagnetic coil, the rotation of control rotor, by rotatablely moving of motion thread adjutant rotor be converted into needle vertically straight line move, thereby regulate the flow area of valve port, adjusting flows to the refrigerant flow of vaporizer, and the refrigeration agent to vaporizer supply optimal dose guarantees the efficient operation of refrigeration system.
In order to guarantee the electric expansion valve reliably working, require the secondary necessary precision size of motion thread of electric expansion valve, rotational resistance is little, and is wear-resisting reliable.So when valve design body structure and the selection of material and preparation process, how to realize the precision size of motion thread pair, wear-resisting reliable, low friction factor, very crucial to guaranteeing the valve body unfailing performance.
Specially permit in No. 3604756 patent documentations and proposed a kind of solution, promptly the thread surface that forms on screw thread that forms on the valve rod and nut portions is formed with the surface-treated layer of band teflon and nickel material formation.This coating can satisfy usage requirement having under the prerequisite of enough lubricant oil, but considers physical environment, is progressively using now to replace refrigerant.According to the kind that replaces refrigerant, make it lubricated relatively more difficult fully sometimes.The Polyoxyethylene Lauryl Ether of refrigerant, the lubricant oil that the screw section might adhered to washes, so cause the phenomenon of the insufficient lubrication of screw section.At the high load pressure system (as CO
2Refrigeration system) or in the working environment of oil-break and few oil, after product used a period of time, the coating surface Organizational Structure was destroyed rapidly, produced the black wearer, screw thread place resistance increases, and electric expansion valve can occur moving unreliable then, is failure to actuate until stuck.If add large driving force and design margin, can cause volume structure to become big like this, and it is very limited to improve effect.Demand is developed a kind of under no oily operating mode and be widely used in the electric expansion valve that various refrigerants can action messages.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition is the defective that is difficult to extensively be suitable for all kinds of refrigerants and high load pressure system that overcomes the thread surface processing layer existence of prior art, and a kind of new electric expansion valve and processing method thereof are provided.The present invention is by the following technical solutions for this reason:
A kind of electric expansion valve; its valve body is provided with retaining thread; its valve body chamber is built-in with a multi-polar magnetic rotor; this rotor is provided with the rotation screw thread supporting with described retaining thread; described retaining thread with rotate screw thread form one can relative accurate turn the motion thread pair, it is characterized in that described retaining thread and the protective film of one deck carbon atoms is at least had a mind to be coated with at least one the surface of rotating in the screw thread.
As the further of above-mentioned electric expansion valve improved and replenish, the present invention also comprises following additional technical feature:
Described magnet rotor is made up of described rotation screw thread and the permanent magnet with multi-polar magnetic, and described rotation screw thread constrains at circumferencial direction each other with permanent magnet, can't relatively rotate.
Carbon atom part in the described protective film exists with the diamond form.
Contain elementary sulfur, nitrogen, phosphorus or the molybdenum that can reduce friction factor in the described protective film.
The thickness of described protective film is below the 3 μ m.
A kind of processing method of electric expansion valve; the valve body of described electric expansion valve is provided with retaining thread; its valve body chamber is built-in with a multi-polar magnetic rotor; this rotor is provided with the rotation screw thread supporting with described retaining thread; described retaining thread with rotate screw thread form one can relative accurate turn the motion thread pair; it is characterized in that having a mind to be coated with the protective film of one deck carbon atoms at least, and the carbon atom part exists with the diamond form at the described retaining thread and at least one the surface of rotating in the screw thread.
Improve and replenish as the further of processing method to above-mentioned electric expansion valve, the present invention also comprises following additional technical feature:
Infiltrate elementary sulfur, oxygen, nitrogen, phosphorus or the molybdenum that strengthens bearing capacity or reduce friction factor with the ion injection mode in described body material, this mode does not change the matrix size, applies the diamantiferous protective film of one deck at least then in the above.
The THICKNESS CONTROL of described protective film is below 3 μ m.
On the metal species body material, process described screw thread,,, remove the impurity of thread surface by peace and quiet screw thread because intensity is enough, then the screw thread appearance adopt the low temperature coating technology as filtered cathodic vacuum arc or magnetic control spray apply as described in protective film.
And process described screw thread at the body material that has birth defect (having fragility) such as plastics strength deficiency or pottery; and peace and quiet screw thread; remove the impurity of thread surface; increase one deck modified film layer with the ion injection mode in thread surface then; defectives such as intensity that change body material itself exists or toughness; coherent element directly penetrates in the matrix; with concentration with graded; can be not influential to size; therefore; promptly unstressed; the ability temperature variation; adhesive strength is good, has changed defectives such as intensity that body material itself exists or toughness again, at last the screw thread appearance adopt the low temperature coating technology as filtered cathodic vacuum arc or magnetic control spray apply as described in protective film.The composite deposite of Xing Chenging possesses wear resistant friction reducing like this, generally is applicable to all kinds of refrigerant media, and the injection moulding strong magnet magnetizes such as neodymium iron boron again outside again, and assembling forms the multi-polar magnetic rotor part, refills valve and forms the electric expansion valve finished product.
The invention has the beneficial effects as follows:
Adopt the protective film of carbon atoms, and adopt coating technologies such as filtered cathodic vacuum arc or magnetic control injection, the carbon atom part in the protective film of formation; it mainly is the diamond form; therefore its hardness tester, can make the operating life of product improve several times to tens times inferior to diamond.Have excellent abrasive, and have extraordinary chemical stability and cold-resistant medium characteristic widely, unstressed for temperature variation.Make electric expansion valve under tight bad operating conditions, promptly high load is (such as CO
2The occasion of refrigerant) or in the working environment of oil-break, few oil and all keep extensive applicability and reliability in all kinds of refrigerant media.Protective film can infiltrate other modified material such as sulphur, nitrogen, phosphorus, molybdenum etc., can obviously reduce resistance, friction factor about 0.1, and the design driven power that needs is little, thereby makes the product structure miniaturization.
Description of drawings
Fig. 1: a kind of electric expansion valve structural representation that the embodiment of the invention provided.
Fig. 2 is the structural representation of retaining thread of the present invention.
Fig. 3 rotates the structural representation of screw thread for the present invention.
Fig. 4 is the structural representation that thread surface of the present invention forms protective film.
Among the figure:
The A-valve body;
The B-coil;
The M-body material;
The BH-protective film;
1-multi-polar magnetic rotor, 1a-screw thread, 1b-permanent magnet;
The 2-nut, the 2a-screw thread;
The 3-needle;
The 4-valve seat;
5-annular valve port.
Embodiment
Below in conjunction with Figure of description the present invention is described in further details.
As shown in Figure 1, electric expansion valve that the present invention relates to and prior art are similar on the formation of component, and its a kind of retaining thread is shown in respectively among Fig. 2,3 with the structure of rotating screw thread, does not repeat them here; Key of the present invention is:
The protective film (see figure 4) of one deck carbon atoms is at least had a mind to be coated with in the surface of at least one in retaining thread and the rotation screw thread, promptly can have a mind to be coated with the protective film of one deck carbon atoms at least or/and rotate the surface of screw thread at retaining thread; Further, the part of the carbon atom in the protective film exists with the diamond form; The thickness of protective film is below the 3 μ m.
In order to realize the present invention, form the protective film of carbon atoms by the method for having a mind to apply, and make the carbon atom part exist with the diamond form, further, can also select following technical measures according to actual needs for use:
In protective film, infiltrate elementary sulfur, nitrogen, phosphorus or the molybdenum that strengthens bearing capacity or reduce friction factor with the ion injection mode.
The THICKNESS CONTROL of protective film is below 3 μ m.
At different materials, can also adopt the different technologies means:
On the metal species body material of less thermal expansion coefficient, process described screw thread; because intensity is enough; by peace and quiet screw thread, remove the impurity of thread surface, then the screw thread appearance adopt the low temperature coating technology as filtered cathodic vacuum arc or magnetic control spray apply as described in protective film.
At the non-metal kind body material (such as plastics or pottery;) or bigger thermal expansion coefficient body material on process described screw thread; and peace and quiet screw thread; remove the impurity of thread surface; increase one deck modified film layer with the ion injection mode in thread surface then; defectives such as intensity that change body material itself exists or toughness are (because ion injects the unrestricted requirement of matrix; it can be ordinary metallic material; plastics or pottery; coherent element is deep in the matrix; with concentration with graded; therefore; unstressed; the ability temperature variation, adhesive strength is good), change intensity or toughness or thermal stress difference defective that body material itself exists; and make ion inject the concentration in gradient of element on body material changing, at last the screw thread appearance adopt the low temperature coating technology as filtered cathodic vacuum arc or magnetic control spray apply as described in protective film.The composite deposite of Xing Chenging possesses wear resistant friction reducing like this, generally is applicable to all kinds of refrigerant media, and the injection moulding strong magnet magnetizes such as neodymium iron boron again outside again, and assembling forms the multi-polar magnetic rotor part, refills valve and forms the electric expansion valve finished product.
Claims (10)
1, a kind of electric expansion valve; its valve body is provided with retaining thread; its valve body chamber is built-in with a multi-polar magnetic rotor; this rotor is provided with the rotation screw thread supporting with described retaining thread; described retaining thread with rotate screw thread form one can relative accurate turn the motion thread pair, it is characterized in that described retaining thread and the protective film of one deck carbon atoms is at least had a mind to be coated with at least one the surface of rotating in the screw thread.
2, electric expansion valve according to claim 1 is characterized in that described magnet rotor is made up of described rotation screw thread and the permanent magnet with multi-polar magnetic, and described rotation screw thread constrains at circumferencial direction each other with permanent magnet.
3, electric expansion valve according to claim 1 is characterized in that the carbon atom part in the described protective film exists with the diamond form.
4, electric expansion valve according to claim 3 is characterized in that containing in the described protective film elementary sulfur, oxygen, nitrogen, phosphorus or the molybdenum that can strengthen bearing capacity or reduce friction factor.
5, according to claim 1,3 or 4 described electric expansion valves, the thickness that it is characterized in that described protective film is below the 3 μ m.
6, a kind of processing method of electric expansion valve; the valve body of described electric expansion valve is provided with retaining thread; its valve body chamber is built-in with a multi-polar magnetic rotor; this rotor is provided with the rotation screw thread supporting with described retaining thread; described retaining thread with rotate screw thread form one can relative accurate turn the motion thread pair; it is characterized in that having a mind to be coated with the protective film of one deck carbon atoms at least, and the carbon atom part exists with the diamond form at the described retaining thread and at least one the surface of rotating in the screw thread.
7, electric expansion valve according to claim 6 is characterized in that infiltrating elementary sulfur, oxygen, nitrogen, phosphorus or the molybdenum that strengthens bearing capacity or reduce friction factor with the ion injection mode in described protective film.
8, according to claim 6 or 7 described electric expansion valves, the THICKNESS CONTROL that it is characterized in that described protective film is below 3 μ m.
9, electric expansion valve according to claim 6 is characterized in that processing described screw thread on body material, and peace and quiet screw thread, removes the impurity of thread surface, adopts the low temperature coating technology to apply in the screw thread appearance then and obtains described protective film.
10, electric expansion valve according to claim 6; it is characterized in that on body material, processing described screw thread; and peace and quiet screw thread; remove the impurity of thread surface; increase one deck modified film layer with the ion injection mode in thread surface then; and make ion inject the concentration in gradient variation of element on body material, adopt the low temperature coating technology to apply in the screw thread appearance at last and obtain described protective film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100599436A CN101526150B (en) | 2008-03-04 | 2008-03-04 | Electronic expansion valve and method for processing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100599436A CN101526150B (en) | 2008-03-04 | 2008-03-04 | Electronic expansion valve and method for processing same |
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| Publication Number | Publication Date |
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| CN101526150A true CN101526150A (en) | 2009-09-09 |
| CN101526150B CN101526150B (en) | 2010-08-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216663A (en) * | 2013-03-20 | 2013-07-24 | 何永水 | Electric valve |
| CN104962859A (en) * | 2014-09-05 | 2015-10-07 | 北京机械工业自动化研究所 | Method for preparing WS2/Ag compositional gradient solid lubrication film |
| CN105247258A (en) * | 2014-03-28 | 2016-01-13 | 浙江三花股份有限公司 | Refrigeration valve component, refrigeration valve and manufacturing method therefor |
| CN108692042A (en) * | 2017-04-12 | 2018-10-23 | 杭州三花研究院有限公司 | Electric expansion valve |
-
2008
- 2008-03-04 CN CN2008100599436A patent/CN101526150B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216663A (en) * | 2013-03-20 | 2013-07-24 | 何永水 | Electric valve |
| CN105247258A (en) * | 2014-03-28 | 2016-01-13 | 浙江三花股份有限公司 | Refrigeration valve component, refrigeration valve and manufacturing method therefor |
| CN104962859A (en) * | 2014-09-05 | 2015-10-07 | 北京机械工业自动化研究所 | Method for preparing WS2/Ag compositional gradient solid lubrication film |
| CN104962859B (en) * | 2014-09-05 | 2018-04-24 | 北京机械工业自动化研究所 | WS2The manufacture method of/Ag complex gradient solid lubricating films |
| CN108692042A (en) * | 2017-04-12 | 2018-10-23 | 杭州三花研究院有限公司 | Electric expansion valve |
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| Publication number | Publication date |
|---|---|
| CN101526150B (en) | 2010-08-18 |
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Address after: 312500 Shaoxing City, Zhejiang province Xinchang Qixing street under the Liquan Patentee after: Zhejiang three flower intelligent control Limited by Share Ltd Address before: 312500 Zhejiang County in Xinchang Province town of Liquan Patentee before: Zhejiang Sanhua Group Co., Ltd. |