CN104696581A - Stop mechanism and electronic expansion valve - Google Patents
Stop mechanism and electronic expansion valve Download PDFInfo
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- CN104696581A CN104696581A CN201310651885.7A CN201310651885A CN104696581A CN 104696581 A CN104696581 A CN 104696581A CN 201310651885 A CN201310651885 A CN 201310651885A CN 104696581 A CN104696581 A CN 104696581A
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- Prior art keywords
- helical guideway
- extension
- slip ring
- stop mechanism
- guide rod
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- 230000007246 mechanism Effects 0.000 title claims abstract description 74
- 230000007704 transition Effects 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 12
- 238000005452 bending Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000013519 translation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003507 refrigerant Substances 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
- F16K31/44—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
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- 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
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- 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
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
- F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
The invention relates to a stop mechanism and an electronic expansion valve. In one aspect, there is provided a stop mechanism comprising: the spiral guide rail comprises an upper stop part and a lower stop part; a slip ring adapted to be supported to the helical track such that the slip ring is slidable relative to the helical track; and a guide rod adapted to guide the slide ring in an axial translational movement, wherein the slide ring comprises: a helical body portion; and a first projecting portion and a second projecting portion respectively projecting outwardly from respective ends of the helical body portion, the first projecting portion and the second projecting portion being adapted to abut against the upper stop portion and the lower stop portion, respectively. According to the invention, the stress state of the slip ring can be effectively improved, the reliability and the service life of related parts (such as the slip ring) are obviously improved, and the application range of the slip ring and the stop mechanism is expanded.
Description
Technical field
The present invention relates to a kind of stop mechanism and a kind of electric expansion valve comprising this stop mechanism.
Background technique
Electric expansion valve is the vitals in cooling/heating system, is mainly used in regulating the flow of refrigerant fluid.Traditional electric expansion valve generally adopts stepper motor to control, and is usually made up of driving mechanism (stepper motor), actuator (thread screw mechanism), throttle mechanism (needle valve seat) and relevant assisting agency.
In order to avoid the screw pair (such as, the male end of axle and the interior threaded hole of anti-rotational latch) excessively rotating because of rotor and axle and cause is killed and wear problem, the stop mechanism of the rotating range for limiting axle can be set.Preventing in the stop mechanism excessively rotated, slip ring bit-stopping structure has a wide range of applications.This slip ring bit-stopping structure can prevent the stroke of outside thread in tapped hole excessive and locked in tapped hole and cause deformed threads, or can limit the stroke range of outside thread in tapped hole.
But, in the art, there is the demand of stress slip ring bit-stopping structure improved effectively to improve slip ring, the reliability improving related components (such as slip ring) and life-span, expansion using scope.
Here, it should be pointed out that the technology contents provided in this part is intended to contribute to those skilled in the art's the understanding of the present invention, and not necessarily form prior art.
Summary of the invention
Total summary of the present invention is provided in this part, instead of the complete scope of the present invention or the present invention institute characteristic comprehensively open.
An object of one or more mode of execution of the present invention is to provide a kind ofly can be improved the stop mechanism of the stress of slip ring and comprise the electric expansion valve of this stop mechanism.
Another object of one or more mode of execution of the present invention is to provide one and can improves the reliability of related components (such as slip ring) and the stop mechanism in life-span and comprise the electric expansion valve of this stop mechanism.
Another object of one or more mode of execution of the present invention is to provide a kind ofly can be expanded the stop mechanism of the using scope of slip ring and then stop mechanism and comprise the electric expansion valve of this stop mechanism.
One or more to achieve these goals, according to an aspect of the present invention, provide a kind of stop mechanism, comprising: helical guideway, described helical guideway comprises upper position-arresting portion and lower position-arresting portion; Slip ring, described slip ring is suitable for being supported on described helical guideway, make described slip ring can with described helical guideway relative sliding; And guide rod, described guide rod is suitable for guiding described slip ring to carry out axial translational movement, and wherein, described slip ring comprises: Spiral Notebook body; And respectively from outwardly directed first extension of the associated end of described Spiral Notebook body and the second extension, described first extension and described second extension are suitable for abutting with described upper position-arresting portion and described lower position-arresting portion respectively.
One or more to achieve these goals, according to a further aspect in the invention, provide a kind of electric expansion valve, comprising: valve assembly, and described valve assembly comprises movable valve member and for regulating the flow of the fluid flowing through described electric expansion valve; Actuator, described actuator comprises axle and for driving described movable valve member to carry out axial motion; Driving mechanism, described driving mechanism is used for providing power for described actuator; And stop mechanism as described above.
According to one or more mode of execution of the present invention, in stop mechanism, owing to improving the structure of helical guideway and slip ring---that is two extensions be set in slip ring and correspondingly the position-arresting part of helical guideway be outwards shifted, therefore effectively improving the stress of slip ring, the significantly improve related components reliability of (such as slip ring) and life-span and expand the using scope of slip ring and then stop mechanism.
Accompanying drawing explanation
By the description referring to accompanying drawing, the feature and advantage of one or more mode of execution of the present invention will become easier to understand, in the accompanying drawings:
Fig. 1 is the exploded perspective view that stop mechanism according to exemplary embodiment of the invention and associated member thereof are shown;
Fig. 2 illustrates the schematic diagram being in lower position-arresting position according to the stop mechanism of exemplary embodiment of the invention;
Fig. 3 illustrates the schematic diagram being in upper position-arresting position according to the stop mechanism of exemplary embodiment of the invention;
Fig. 4 A illustrates the cross-sectional figure in the mated condition according to the position-arresting part of slip ring, guide rod and helical guideway in exemplary embodiment of the invention;
Fig. 4 B is the cross-sectional figure of the stressing conditions for illustration of slip ring corresponding to Fig. 4 A;
Fig. 5 is the planimetric map of the another kind of slip ring illustrated according to exemplary embodiment of the invention;
Fig. 6 is the planimetric map of the another kind of slip ring illustrated according to exemplary embodiment of the invention; And
Fig. 7 is the stereogram of the slip ring illustrated according to correlation technique.
Embodiment
With reference to the accompanying drawings, describe the present invention by illustrative embodiments.Be only for demonstration object to following detailed description of the present invention, and be never the restriction to the present invention and application or purposes.
Referring now to Fig. 1 to Fig. 3, the general structure according to the stop mechanism for electric expansion valve of exemplary embodiment of the invention is described.Wherein, Fig. 1 is the exploded perspective view that stop mechanism according to exemplary embodiment of the invention and associated member thereof are shown, Fig. 2 illustrates the schematic diagram being in lower position-arresting position according to the stop mechanism of exemplary embodiment of the invention, and Fig. 3 illustrates the schematic diagram being in upper position-arresting position according to the stop mechanism of exemplary embodiment of the invention.
First, electric expansion valve can comprise: for the valve assembly comprising needle regulated the flow of the fluid flowing through electric expansion valve; For the actuator comprising axle driving the movable valve member of valve assembly (needle) to carry out axial motion; And provide the driving mechanism (such as stepper motor) of power for actuator.
According to embodiment of the present invention, electric expansion valve also comprises stop mechanism 60.Stop mechanism 60 can comprise: helical guideway (spring helical guideway) 601; Slip ring 603; And guide rod 605.
In preferred example, helical guideway 601 comprises: helical guideway portion 6011, and helical guideway portion 6011 is for supporting slip ring 603; First end (upper end portion) 6012; And the second end (underpart) 6013.
First end 6012 extends the upper end from helical guideway portion 6011.Especially, first end 6012 can comprise: from the upper end in helical guideway portion 6011, with the mode departing from the helical trajectory in helical guideway portion 6011 by suitably/predetermined angle outwards (towards radial outside) extend the transition part section 6012A of suitably/intended distance obliquely; And the abutting part section 6012B(that vertically (or roughly vertically) upwards extends from the outer end of transition part section 6012A is used as according to upper position-arresting portion of the present invention).
The second end 6013 extends the lower end from helical guideway portion 6011.Especially, the second end 6013 can comprise: from the lower end in helical guideway portion 6011, with the mode departing from the helical trajectory in helical guideway portion 6011 by suitably/predetermined angle outwards (towards radial outside) extend the transition part section 6013A of suitably/intended distance obliquely; And from the outer end of transition part section 6013A vertically (or roughly vertically) be used as according to lower position-arresting portion of the present invention to the abutting part section 6013B(of downward-extension).
In some instances, helical guideway 601 can be connected with axle sleeve 70.Such as, axle sleeve 70 is provided with jack 702, and the lower end 6013C(of the abutting part section 6013B of the second end 6013 that is the lower end in lower position-arresting portion) be suitable for being inserted in jack 702, helical guideway 601 and axle sleeve 70 are rotated integratedly.In preferred example, the lower end 6013C of abutting part section 6013B is inserted in jack 702 by modes such as such as interference fit, welding, bondings regularly, rotates to make helical guideway 601 stably follow the rotation of axle sleeve 70.
Axle sleeve 70 is suitable for being fixedly connected to axle 50(in electric expansion valve, and axle 50 can be configured to rotate integratedly with the rotor of stepper motor).Especially, axle sleeve 70 is provided with central through bore 701, axle sleeve 70 such as can be enclosed within the suitable axial positions (such as lower portion) of axle 50 regularly by modes such as interference fit, welding, bondings thus, makes axle sleeve 70 follow the rotation of axle 50 and rotate.
Axle sleeve 70 is suitable for being inserted into supporting element 80(in electric expansion valve, supporting element 80 can be configured to fix relative to the shell of electric expansion valve) through hole 801 in, make supporting element 80 can with axle sleeve 70 slip joint, thus guide the rotary motion (and also guiding the axial motion of axle 50 in some cases) of the axle 50 be permanently connected with axle sleeve 70.
Thus, helical guideway 601 is fixedly attached to the periphery of axle 50 (such as via axle sleeve 70, arrange around axle 50 in the suitable axial positions of axle 50), and helical guideway 601 and axle 50 connect into and are rotated integratedly with axle 50 under the guiding of supporting element (and also carrying out axial motion in some cases).
Here, it should be noted that, connection between helical guideway 601 and axle sleeve 70 and the connection between axle sleeve 70 and axle 50 also can realize with other appropriate ways, as long as helical guideway 601 and axle 50 can be made to be rotated integratedly (and also carrying out axial motion integratedly in some cases).
In addition, it should be pointed out that in helical guideway 601, axle sleeve 70 and axle 50 arbitrarily both can form, or all three can form.Such as, helical guideway 601 can by with the common injection moulding of axle 50 and be formed on the periphery of axle 50.
In addition, it should be pointed out that and can omit axle sleeve 70.
Additionally with reference to Fig. 4 A and Fig. 4 B(Fig. 4 A, the cross-sectional figure in the mated condition according to the position-arresting part of slip ring, guide rod and helical guideway in exemplary embodiment of the invention is shown, and Fig. 4 B is the cross-sectional figure of the stressing conditions for illustration of slip ring corresponding to Fig. 4 A), according to embodiment of the present invention, slip ring 603 can comprise: Spiral Notebook body 6031; The abutting part section 6012B that first extension (upper extension) the 6032, first extension 6032 is suitable in side with the first end 6012 of helical guideway 601 abuts, and is also suitable for abutting with guide rod 605 at opposite side; And second the abutting part section 6013B that is suitable in side with the second end 6013 of helical guideway 601 of extension (lower extension) 6033, second extension 6033 abut, and be also suitable for abutting with guide rod 605 at opposite side.
In preferred example, Spiral Notebook body 6031 has the helical configuration matched with the helical configuration in helical guideway portion 6011, makes Spiral Notebook body 6031 can be supported on helical guideway portion 6011 and makes can realize relative sliding between Spiral Notebook body 6031 and helical guideway portion 6011.
In preferred example, the first extension 6032 and the second extension 6033(are hereinafter referred to as extension sometimes) respectively since Spiral Notebook body 6031 associated end in the horizontal direction and radially extend.Like this, under the state that slip ring 603 is in upper position-arresting position or lower position-arresting position (hereinafter sometimes upper position-arresting position and lower position-arresting position being referred to as stop bit position), can be conducive to the distance between two of extension force bearing points is shortened as much as possible, thus be conducive to the stress improving extension.But, it should be pointed out that other bearing of trend that it is contemplated that the first extension 6032 and the second extension 6033.Such as, extension can Off-Radial direction or slightly depart from substantially horizontal or Off-Radial direction and substantially horizontal slightly slightly.
As shown in Figure 4 A and 4 B shown in FIG., the region PR(corresponding with the ring body overlapping part 6031A of Spiral Notebook body 6031 that slip ring 603 is limited with between the first extension 6032 with the second extension 6033 is used as according to housing region of the present invention).Under the assembled state of stop mechanism 60, guide rod 605 is contained in the PR of region.Here, it is pointed out that when slip ring 603 be embodied as many ring bodies but not monocycle body as shown in Figure 1, ring body overlapping part 6031A refers to the overlapping maximum part of ring body of Spiral Notebook body 6031.
In some instances, the angle [alpha] (angle circumferentially) of the region PR between the first extension 6032 and the second extension 6033 can be 90 degree or 90 ± 5 degree (as illustrated in figures 4 a and 4b).In other example, the angle [alpha] of region PR can be larger, such as, be 150 degree (as shown in Figure 6, Fig. 6 is the planimetric map of the another kind of slip ring illustrated according to exemplary embodiment of the invention).In other example, the angle [alpha] of region PR can be less, such as, be 45 degree (as shown in Figure 5, Fig. 5 is the planimetric map of the another kind of slip ring illustrated according to exemplary embodiment of the invention).Here, also region PR can be designed so that guide rod 605 simultaneously with the first extension 6032 and the second extension 6033 slip joint.In this way, can eliminate the idle running of slip ring 603 when carrying out commutation translation, this contributes to the accurate limiting realizing stop mechanism in some cases.
In preferred example, the guide rod 605 being embodied as single guide rod is connected with supporting element 80, makes guide rod 605 from the upper-end surface of supporting element 80 such as vertically towards upper extension.In the example shown in the series of figures, supporting element 80 is provided with jack 802, and the lower end of guide rod 605 is suitable for being inserted in jack 802.Especially, the lower end of guide rod 605 is inserted in jack 802 regularly by modes such as such as interference fit, welding, bondings.Here, it should be pointed out that guide rod 605 and supporting element 80 also can form.
The working procedure of the stop mechanism for electric expansion valve according to exemplary embodiment of the invention is described below.
Be described from the state that stop mechanism 60 is in as shown in Figure 2.In fig. 2, slip ring 603 is in lower position-arresting position, that is, the second extension 6033 of slip ring 603 abut with the abutting part section 6013B of the second end 6013 of helical guideway 601 in side and abut with guide rod 605 at opposite side (as Fig. 4 A be clearly shown that).Accordingly, axle 50 is now in the second rotation stop bit position, and electric expansion valve be in closed positions (, it should be pointed out that also electric expansion valve can be designed to the needle when slip ring 603 is in lower position-arresting position be in fully open position) here by the shaft-driven needle of the heart.
Then, when needing to open electric expansion valve or need valve opening (the tuning up) that regulate electric expansion valve, driving mechanism to electric expansion valve executes electricity, makes axle 50 under the drive of the rotor of driving mechanism, rotate (to anticlockwise in as Fig. 2) along second direction (clockwise direction as in Fig. 4 A) thus leave the second rotation stop bit position.Along with axle 50 rotates along second direction, the helical guideway 601 forming as one with axle 50 or be permanently connected also rotates along second direction.Meanwhile, slip ring 603 also rotates along second direction and makes the second extension 6033 leave guide rod 605 until the first extension 6032 abuts guide rod 605 from opposite side under the drive of helical guideway 601.Then, when helical guideway 601 continues to rotate along second direction along with axle 50, slip ring 603 is forced to upwards translation vertically because the first extension 6032 abuts guide rod 605.Slip ring 603 can vertically upwards translation until arrive upper position-arresting position (as shown in Figure 3).In figure 3, the first extension 6032 of slip ring 603 is abutted by the abutting part section 6012B of the first end 6012 of helical guideway 601 in side and abuts with guide rod 605 at opposite side.Accordingly, axle 50 is now in the first rotation stop bit position, and electric expansion valve be in fully open position by the shaft-driven needle of the heart.
Afterwards, when needing to close electric expansion valve or need valve opening (the turning down) that regulate electric expansion valve, driving mechanism to electric expansion valve executes electricity, makes axle 50 under the drive of the rotor of driving mechanism, rotate (to right rotation in as Fig. 2) along first direction (counter clockwise direction as in Fig. 4 A) thus leave the first rotation stop bit position.Thus slip ring 603 in a similar manner can translation downwards vertically until again arrive lower position-arresting position (as shown in Figure 2).
According to embodiment of the present invention, at least following beneficial effect can be provided.
According to embodiment of the present invention, in stop mechanism, effectively improve the stress of slip ring, the reliability significantly improving related components (such as slip ring) and life-span owing to improving the structure of helical guideway and slip ring and expand the using scope of slip ring and then stop mechanism.
Comparing (stereogram that Fig. 7 is the slip ring illustrated according to correlation technique) of the stressing conditions of stressing conditions according to the slip ring of embodiment of the present invention and the slip ring according to correlation technique is described referring to Fig. 4 B and Fig. 7.As shown in Figure 7, comprise according to the slip ring 603' of correlation technique: Spiral Notebook body 6031'; Single extension (upper extension) 6032'; And abutment end 6035'.Correspondingly, in the helical guideway of the stop mechanism according to correlation technique, the second end not from the lower end in helical guideway portion, with the mode departing from the helical trajectory in helical guideway portion by suitable angle outwards (towards radial outside) extend suitable distance obliquely, but directly from the lower end in helical guideway portion vertically (or roughly vertically) to downward-extension.Thus, the abutment end 6035' of slip ring 603' can abut with the second end of helical guideway and be in lower position-arresting position.When being in lower position-arresting position, abutment end 6035' is pressed against by the second end of helical guideway and is applied in external force Fn, and simultaneously extension 6032' is directed to bar and is pressed against and is applied in external force Fg.Thus, slip ring deforms, and is learnt by stressed and failure analysis, and the moment of flexure of bearing at the easy breaking off section TF place as shown in Figure 7 of the ring body of the Spiral Notebook body 6031' of slip ring 603' is maximum, its value is up to about " 2*Td " (wherein, Td is the torque be added in axle).It can thus be appreciated that the stress of slip ring is not good, and very easily loses efficacy because of fracture.According to the failure analysis that claimant carries out, namely the slip ring 603' according to a certain model of correlation technique ruptures after 20 ~ 300,000 reliability testings.
By contrast, according in the stop mechanism 60 of embodiment of the present invention, slip ring 603 comprises the second extension 6033, and correspondingly, the second end 6013 of helical guideway 601 comprises: from the lower end in helical guideway portion 6011, with the mode departing from the helical trajectory in helical guideway portion 6011 by suitable angle outwards (towards radial outside) extend the transition part section 6013A of suitable distance obliquely; And from the outer end of transition part section 6013A vertically (or roughly vertically) to the abutting part section 6013B of downward-extension.Therefore, when being in lower position-arresting position, as shown in Figure 4 B, the second extension 6033 is pressed against by the second end 6013 of helical guideway 601 and is applied in external force Fs, and simultaneously the second extension 6033 is directed to bar 605 and is pressed against from opposite side and is applied in external force Fg.Learnt by stressed and failure analysis, as shown in Figure 4 B, when the impressed torque that axle is born for Td and bear make a concerted effort for Fc, the part that slip ring 603 the bears maximal bending moment moment of flexure of bearing can be calculated (wherein by formula " Td(L2-L1)/L2 ", Td is the torque be added in axle, L1 is the distance of the second end to the force application location of the second extension and axle axle center of the slip ring of helical guideway, and L2 is the force application location of guide rod to the second extension of slip ring and the distance in axle axle center).By above-mentioned calculating, the known maximal bending moment " Td(L2-L1)/L2 " born according to the slip ring of embodiment of the present invention is much smaller than the above-mentioned maximal bending moment " 2*Td " born according to the slip ring of correlation technique.It can thus be appreciated that the stress of slip ring is improved, thus slip ring not easy-rupturing and more reliable.According to the failure analysis that claimant carries out, when other experimental condition is identical with the experimental condition of the above-mentioned failure analysis carried out according to correlation technique, according to the slip ring of embodiment of the present invention by 1,500,000 life tests.
In addition, and attempt guide rod is inwardly displaced and make on extension two project plan comparison that force bearing point is close, the scheme that the position-arresting part of helical guideway is outwards shifted being had advantages such as being convenient to assembling.
Known by formula " Td(L2-L1)/L2 ", " L2-L1 " less---and namely the abutting part section 6013B of the second end 6013 of helical guideway 601 makes two force bearing points on the second extension 6033 more close the closer to guide rod 605 in radial directions, then the maximal bending moment that bears of slip ring is less.Therefore, according to embodiment of the present invention, under avoiding abutting part section and guide rod 605 to rotate the prerequisite of interference, advantageously make abutting part section be positioned as close to guide rod in radial directions.In some instances, the abutting part section 6013B of the second end 6013 of helical guideway 601 and guide rod 605 distance in radial directions can be only 1mm.
In the description structure of stop mechanism 60 carried out above, " suitably/intended distance " can instigate the radial position residing for abutting part section compared to correlation technique more near the radial position of guide rod thus the maximal bending moment making slip ring bear is less compared to correlation technique, and " suitably/predetermined angle " can instigate first end/the second end is easy to processing and can maintains sufficient intensity simultaneously.
Relative to specific descriptions of carrying out for illustrative purposes above, stop mechanism according to the present invention allows some variants and modifications.
Be not limited to according to stop mechanism of the present invention and slip ring thereof and be applied to electric expansion valve, but also can be applied to other suitable device needing to perform rotary stopper.
In a kind of modification, by appropriate ways, first end 6012(can be specially abutting part section 6012B) be fixed to the periphery (such as via the upper end of abutting part section 6012B) of axle 50.In this way, can make helical guideway 601 especially first end 6012 be able to more stably locate, thus the stable relative sliding be conducive between helical guideway 601 with slip ring 603 is also conducive to first end 6012 abuts with the first the stable of extension 6032.And, when the upper end via abutting part section 6012B is fixed, this fixing impact on the normal relative sliding between slip ring and helical guideway portion also can be avoided.
In the example shown in the series of figures, the extension that can abut mutually, abutting part section and guide rod are depicted as has circular cross section, but, it should be noted that, the cross section of extension, abutting part section and guide rod also can be other suitable shape, such as square or oval etc.
About the structure of the stop mechanism of electric expansion valve, be also described in another Chinese patent (ZL201220452104.2) of claimant.This Chinese patent is all incorporated in the application by quoting as proof at this.
In a word, in stop mechanism according to the present invention, following advantageous scheme can be comprised.
In stop mechanism according to the present invention, described first extension and described second extension are respectively from the associated end of described Spiral Notebook body radially and extend in the horizontal direction.
In stop mechanism according to the present invention, described slip ring is limited with the housing region corresponding with the ring body overlapping part of described Spiral Notebook body between described first extension with described second extension, and described guide rod is contained in described housing region.
In stop mechanism according to the present invention, described housing region angle is circumferentially 45 degree to 150 degree.
In stop mechanism according to the present invention, described housing region angle is circumferentially 90 ± 5 degree.
In stop mechanism according to the present invention, described housing region be designed so that described guide rod simultaneously with described first extension and described second extension slip joint.
In stop mechanism according to the present invention, described first extension is also suitable for abutting with described guide rod at the opposite side contrary with the side that described upper position-arresting portion abuts, and described second extension is also suitable for abutting with described guide rod at the opposite side contrary with the side that described lower position-arresting portion abuts.
In stop mechanism according to the present invention, described helical guideway comprises: helical guideway portion, and described helical guideway portion is for supporting the Spiral Notebook body of described slip ring; First end; And the second end, described first end extends the upper end from described helical guideway portion, and comprises: from the transition part section of the upper end in described helical guideway portion, the intended distance that to stretch out in the mode of the helical trajectory departing from described helical guideway portion; And from the outer end of described transition part section along the abutting part section being used as described upper position-arresting portion that roughly vertical direction upwards extends, and, described the second end extends the lower end from described helical guideway portion, and comprises: from the transition part section of the lower end in described helical guideway portion, the suitable distance that to stretch out in the mode of the helical trajectory departing from described helical guideway portion; And from the outer end of described transition part section along roughly vertical direction to the abutting part section being used as described lower position-arresting portion of downward-extension.
In stop mechanism according to the present invention, described helical guideway is designed under avoiding described upper position-arresting portion and described lower position-arresting portion and described guide rod to rotate the prerequisite of interference, make described upper position-arresting portion and described lower position-arresting portion respectively in radial directions farthest near described guide rod.
In stop mechanism according to the present invention, described upper position-arresting portion and described lower position-arresting portion are 1mm with described guide rod distance in radial directions respectively.
In addition, in electric expansion valve according to the present invention, following advantageous scheme can be comprised.
In electric expansion valve according to the present invention, described helical guideway and described axle are permanently connected or form, and make described helical guideway and described axle at least can carry out rotating integrally motion.
In electric expansion valve according to the present invention, also comprise the axle sleeve being permanently connected with described axle or forming, wherein, described helical guideway and described axle sleeve are permanently connected or form, and make described helical guideway at least can carry out rotating integrally motion with described axle via described axle sleeve.
In electric expansion valve according to the present invention, described axle sleeve is provided with axle sleeve jack, and the lower end in described lower position-arresting portion is suitable for being inserted in described axle sleeve jack.
In electric expansion valve according to the present invention, also comprise supporting element, wherein, described guide rod and described supporting element are permanently connected or form.
In electric expansion valve according to the present invention, the upper-end surface of described supporting element is provided with supporting element jack, and the lower end of described guide rod is suitable for being inserted in described supporting element jack, and described guide rod is upwards extended from the upper-end surface of described supporting element.
In electric expansion valve according to the present invention, also comprise supporting element, wherein, described supporting element comprises through hole, described supporting element by described through hole directly with described axle slip joint or via described shaft room ground connection and described axle slip joint.
In electric expansion valve according to the present invention, the upper position-arresting portion of described helical guideway is fixed to the periphery of described axle.
In present specification, directional terminology " on ", D score, "left", "right", " substantially horizontal ", " radial direction ", " vertical direction " and " axis " etc. use only for the object being convenient to describe, and should not be considered as being restrictive.Such as, " substantially horizontal " correspond to go out as shown in Figure 2 with the direction of the longitudinal axis orthogonal of axle, therefore, when between the actual spreadable life, axle becomes horizontal state from the vertically-arranged state shown in Fig. 2, " substantially horizontal " will become not corresponding with geographic substantially horizontal.
Although with reference to illustrative embodiments, invention has been described, but be to be understood that, the present invention is not limited in literary composition the concrete example/mode of execution described in detail and illustrate, when not departing from claims limited range, those skilled in the art can make various change to illustrative embodiments.
Claims (18)
1. a stop mechanism (60), comprising:
Helical guideway (601), described helical guideway (601) comprises upper position-arresting portion (6012B) and lower position-arresting portion (6013B);
Slip ring (603), described slip ring (603) is suitable for being supported on described helical guideway (601), make described slip ring (603) can with described helical guideway (601) relative sliding; And
Guide rod (605), described guide rod (605) is suitable for guiding described slip ring (603) to carry out axial translational movement,
Wherein, described slip ring (603) comprising: Spiral Notebook body (6031); And respectively from outwardly directed first extension (6032) of the associated end of described Spiral Notebook body (6031) and the second extension (6033), described first extension (6032) and described second extension (6033) are suitable for abutting with described upper position-arresting portion (6012B) and described lower position-arresting portion (6013B) respectively.
2. stop mechanism according to claim 1 (60), wherein, described first extension (6032) and described second extension (6033) are respectively from the associated end of described Spiral Notebook body (6031) radially and extend in the horizontal direction.
3. stop mechanism according to claim 1 and 2 (60), wherein, described slip ring (603) is limited with the housing region (PR) corresponding with the ring body overlapping part (6031A) of described Spiral Notebook body (6031) be positioned between described first extension (6032) with described second extension (6033), and described guide rod (605) is contained in described housing region (PR).
4. stop mechanism according to claim 3 (60), wherein, described housing region (PR) angle circumferentially (α) is 45 degree to 150 degree.
5. stop mechanism according to claim 3 (60), wherein, described housing region (PR) angle circumferentially (α) is 90 ± 5 degree.
6. stop mechanism according to claim 3 (60), wherein, described housing region (PR) be designed so that described guide rod (605) simultaneously with described first extension (6032) and described second extension (6033) slip joint.
7. stop mechanism according to claim 1 and 2 (60), wherein, described first extension (6032) is also suitable for abutting with described guide rod (605) at the opposite side contrary with the side that described upper position-arresting portion (6012B) abuts, and described second extension (6033) is also suitable for abutting with described guide rod (605) at the opposite side contrary with the side that described lower position-arresting portion (6013B) abuts.
8. stop mechanism according to claim 1 and 2 (60), wherein
Described helical guideway (601) comprising: helical guideway portion (6011), and described helical guideway portion (6011) is for supporting the Spiral Notebook body (6031) of described slip ring (603); First end (6012); And the second end (6013),
Described first end (6012) extends from the upper end of described helical guideway portion (6011), and comprises: from the transition part section (6012A) of the upper end of described helical guideway portion (6011), the intended distance that to stretch out in the mode of the helical trajectory departing from described helical guideway portion (6011); And from the outer end of described transition part section (6012A) along the abutting part section (6012B) being used as described upper position-arresting portion (6012B) that roughly vertical direction upwards extends,
And, described the second end (6013) extends from the lower end of described helical guideway portion (6011), and comprises: from the transition part section (6013A) of the lower end of described helical guideway portion (6011), the suitable distance that to stretch out in the mode of the helical trajectory departing from described helical guideway portion (6011); And from the outer end of described transition part section (6013A) along roughly vertical direction to the abutting part section (6013B) being used as described lower position-arresting portion (6013B) of downward-extension.
9. stop mechanism according to claim 1 and 2 (60), wherein, described helical guideway (601) is designed to make described upper position-arresting portion (6012B) and described lower position-arresting portion (6013B) respectively in radial directions farthest near described guide rod (605) under avoiding described upper position-arresting portion (6012B) and described lower position-arresting portion (6013B) to rotate the prerequisite of interference with described guide rod (605).
10. stop mechanism according to claim 9 (60), wherein, described upper position-arresting portion (6012B) and described lower position-arresting portion (6013B) are 1mm with described guide rod (605) distance in radial directions respectively.
11. 1 kinds of electric expansion valves, comprising:
Valve assembly, described valve assembly comprises movable valve member and for regulating the flow of the fluid flowing through described electric expansion valve;
Actuator, described actuator comprises axle (50) and for driving described movable valve member to carry out axial motion;
Driving mechanism, described driving mechanism is used for providing power for described actuator; And
Stop mechanism according to any one of claim 1 to 10 (60).
12. electric expansion valves according to claim 11, wherein, described helical guideway (601) and described axle (50) are permanently connected or form, and make described helical guideway (601) and described axle (50) at least can carry out rotating integrally motion.
13. electric expansion valves according to claim 12, also comprise the axle sleeve (70) being permanently connected with described axle (50) or forming, wherein, described helical guideway (601) and described axle sleeve (70) are permanently connected or form, and make described helical guideway (601) at least can carry out rotating integrally motion with described axle (50) via described axle sleeve (70).
14. electric expansion valves according to claim 13, wherein, described axle sleeve (70) are provided with axle sleeve jack (702), and the lower end (6013C) in described lower position-arresting portion (6013B) is suitable for being inserted in described axle sleeve jack (702).
15. electric expansion valves according to claim 11, also comprise supporting element (80), and wherein, described guide rod (605) and described supporting element (80) are permanently connected or form.
16. electric expansion valves according to claim 15, wherein, the upper-end surface of described supporting element (80) is provided with supporting element jack (802), and the lower end of described guide rod (605) is suitable for being inserted in described supporting element jack (802), makes described guide rod (605) upwards extend from the upper-end surface of described supporting element (80).
17. electric expansion valves according to claim 13, also comprise supporting element (80), wherein, described supporting element (80) comprises through hole (801), described supporting element (80) by described through hole (801) directly with described axle (50) slip joint or via described axle sleeve (70) indirectly with described axle (50) slip joint.
18. according to claim 11 to the electric expansion valve according to any one of 17, and wherein, the upper position-arresting portion (6012B) of described helical guideway (601) is fixed to the periphery of described axle (50).
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| CN201310651885.7A CN104696581B (en) | 2013-12-05 | 2013-12-05 | Stop mechanism and electronic expansion valve |
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| CN201310651885.7A CN104696581B (en) | 2013-12-05 | 2013-12-05 | Stop mechanism and electronic expansion valve |
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| CN104696581B CN104696581B (en) | 2017-02-01 |
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| CN107575628A (en) * | 2017-08-28 | 2018-01-12 | 中国电子系统工程第二建设有限公司 | Can far distance controlled butterfly valve actuator |
| CN111182182A (en) * | 2019-12-26 | 2020-05-19 | 浙江大华技术股份有限公司 | Twisted wire and slip ring combined mechanism and spherical camera |
| CN112901792A (en) * | 2019-12-04 | 2021-06-04 | 伊希欧1控股有限公司 | Expansion valve |
| US12072039B2 (en) | 2018-12-20 | 2024-08-27 | Danfoss A/S | Electric expansion valve |
| US12117215B2 (en) | 2018-12-20 | 2024-10-15 | Danfoss A/S | Valve having a motor arranged inside a tube having sections with different diameters |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111182182A (en) * | 2019-12-26 | 2020-05-19 | 浙江大华技术股份有限公司 | Twisted wire and slip ring combined mechanism and spherical camera |
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| Publication number | Publication date |
|---|---|
| CN104696581B (en) | 2017-02-01 |
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