CN108916448A - Valve actuator for pulse tube expander - Google Patents
Valve actuator for pulse tube expander Download PDFInfo
- Publication number
- CN108916448A CN108916448A CN201810949114.9A CN201810949114A CN108916448A CN 108916448 A CN108916448 A CN 108916448A CN 201810949114 A CN201810949114 A CN 201810949114A CN 108916448 A CN108916448 A CN 108916448A
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- China
- Prior art keywords
- valve
- high pressure
- low pressure
- phase cam
- pressure phase
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
-
- 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
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a kind of valve actuators for pulse tube expander, including：Phase cam component comprising high pressure phase cam and low pressure phase cam, high pressure phase cam and low pressure phase cam are coaxially connected on a machine shaft；Valve rod assembly, it includes high pressure valve rod, low pressure stem gas, high pressure valve rod, low pressure stem gas lower end are connect with the spool of a valve respectively, high pressure valve rod, low pressure stem gas upper end are equipped with top component, top component upper end on high pressure valve rod is abutted with high pressure phase cam, top component upper end on low pressure stem gas is abutted with low pressure phase cam, a spring is arranged with outside high pressure valve rod, low pressure stem gas, lower spring end is connected on valve base, upper end is abutted with corresponding top component lower end respectively.Valve actuator of the invention can utmostly reduce the mechanical wear during driving valve motion, extend valve service life using the contact of high pressure phase cam, low pressure phase cam and top component.
Description
Technical field
The present invention relates to low-temperature refrigeration technology fields.It is more particularly related to a kind of for pulse tube expander
Valve actuator.
Background technique
The demand of Cryo Equipment is continuously increased in recent years, the requirement to the core component expanding machine in cryogenic system is not yet
It is disconnected to improve.It is more deep to the understanding of vascular refrigerator with the development of various low temperature theories and perfect, fluid flow inside and
The mechanism of temperature-fall period is furtherd investigate.On this basis, it is ground using the flow mechanism of Oscillating flow and pressure change
Pulse tube expander has been made, the expansion cooling of fluid may be implemented, expand machining in the small flow cryogenic system of effective solution
The problem of difficulty big low efficiency.
Pulse tube expander realizes vascular using the alternating opening and closing of height pressure valve and the alternating opening and closing of hot end phase modulation valve
The phase adjusted of internal gas pressure and flow is realized that gas pressure reduction temperature after flowing through pulse tube expander reduces, is realized
Expansion effect.Pulse tube expander has a clear superiority compared to existing expanding machine, and structure is simple, high reliablity, is suitable for
The cryogenic refrigerating system of small flow.Moving component in pulse tube expander only has valve mechanism, may be implemented to gas phase
Regulation and control determines the expansion efficiency of pulse tube expander.And since valve mechanism needs to realize opening and closing at low temperature, absolutely
Heat and sealed nature just directly affect the efficiency of valve, to guarantee good insulation and leakproofness, certainly will be filled out using more
Material and heat insulating member, this directly affects the fluidity of motion of valve, therefore also to the valve actuator of pulse tube expander
Propose high requirement.
For the valve actuator of pulse tube expander, it is necessary first to guarantee higher driving force can be provided, can with gram
The resistance of motion caused by more filler or other heat-insulating and sealing mechanisms is taken, allows valve is normally-open to be closed.Secondly, to protect
High frequency motion may be implemented in card valve, and due to pulse tube expander self character, high frequency motion can effectively improve expander
Efficiency, while flowing can be improved and improve flow, but since seal member and longer valve rod transmission parts lead to high frequency
Movement very relies on the structure of driving device.Finally, the driving device of valve directly affects its service life and operation stability,
Good driving device can guarantee valve stable operation in a longer period of time.
Therefore valve actuator is vital for the valve of pulse tube expander, and good structure design can
To greatly improve the service life of pulse tube expander, expansion efficiency and operation stability.Traditional Cryo Refrigerator drives dress
It sets and is unable to satisfy requirement, because of a kind of valve actuator for pulse tube expander of the invention, meet the need of expander valve
It asks.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide a kind of valve actuators for pulse tube expander, utilize high pressure phase
The contact of cam, low pressure phase cam and top component can utmostly reduce the mechanical mill during driving valve motion
Damage extends valve service life.This kind of mode contacts stabilization simultaneously, without lateral force in motion process, it is possible to prevente effectively from valve
Obstruction and slack problem in high frequency motion.
In order to realize these purposes and other advantages according to the present invention, a kind of valve for pulse tube expander is provided
Driving device, including：
Phase cam component comprising high pressure phase cam and low pressure phase cam, the high pressure phase cam and low pressure
Phase cam is coaxially connected on a machine shaft；
Valve rod assembly comprising respectively with high pressure phase cam, the one-to-one high pressure valve rod of low pressure phase cam, low pressure
Valve rod, the high pressure valve rod, low pressure stem gas pass vertically through valve base, high pressure valve rod, low pressure stem gas lower end respectively with a valve
The spool connection of door, the high pressure valve rod, low pressure stem gas upper end are equipped with top component, the top component upper end on high pressure valve rod
It is abutted with high pressure phase cam, the top component upper end on low pressure stem gas is abutted with low pressure phase cam, high pressure valve rod, low pressure valve
Be arranged with a spring outside bar, the lower spring end is connected on valve base, upper end respectively with corresponding top component lower end
It abuts, the motor rotation drives the rotation of phase cam component to drive high pressure valve rod, low pressure stem gas to move up and down to make valve
Core moves up and down the opening and closing to realize valve.
Preferably, the valve actuator for pulse tube expander, high pressure phase cam and low pressure phase are convex
Wheel includes basic circle section, changeover portion, peach tip, and basic circle section is by two changeover portion peach tip connections, when phase cam component is static,
Top component is contacted with basic circle section, and valve is closed, when phase cam component rotates top component through basic circle section, changeover portion and peach tip
Component is come directly towards in contact process moves down valve opening.
Preferably, the valve actuator for pulse tube expander, each top component includes heading joint
Contact element and top connector, the top contact are to roll shaft, and the rolling shaft can come directly towards on connector around being set to
Shaft rotation, the top contact upper end abuts with high pressure phase cam, low pressure phase cam respectively, and the top connects
High pressure valve rod, the connection of low pressure stem gas upper end are distinguished in part lower end, and the spring upper end is abutted with top connector.
Preferably, the valve actuator for pulse tube expander corresponds to high pressure valve on the valve base
It is equipped with a groove at bar, low pressure stem gas, is equipped with a spring-support plate, the high pressure valve rod, low pressure stem gas lower end in the groove
Spring-support plate is both passed through, the lower spring end is connected to the spring-support plate upper surface.
Preferably, the valve actuator for pulse tube expander, the high pressure phase cam, low pressure phase
Cam passes through pin and is fixedly connected with machine shaft.
Preferably, the valve actuator for pulse tube expander, the axis of the high pressure phase cam with
It is in a certain angle between the axis of the low pressure phase cam.
Preferably, the valve actuator for pulse tube expander, further include fixing piece its be coaxially fixed on
On machine shaft, the low pressure phase cam is between high pressure phase cam and fixing piece and contacting one another.
The present invention is include at least the following beneficial effects：
1, the valve actuator for pulse tube expander of the invention utilizes high pressure phase cam, low pressure phase cam
With the contact of top component, the mechanical wear during driving valve motion can be utmostly reduced, extends valve and uses the longevity
Life.This kind of mode contacts stabilization simultaneously, without lateral force in motion process, it is possible to prevente effectively from obstruction in valve high frequency motion and
Slack problem.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the valve actuator for pulse tube expander of the invention；
Fig. 2 is the cross-sectional view of the valve actuator for pulse tube expander of the invention；
Fig. 3 is the attachment structure schematic diagram of high pressure valve rod and valve spool of valve of the invention；
Fig. 4 is the structural schematic diagram of high pressure phase cam of the invention, low pressure phase cam.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be noted that in the description of the present invention, term " transverse direction ", " longitudinal direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, and is not the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
As shown in figures 1-4, for the valve actuator of pulse tube expander, including：
Phase cam component 2 comprising high pressure phase cam 201 and low pressure phase cam 202, the high pressure phase cam
201 and low pressure phase cam 202 it is coaxially connected in 1 shaft 101 of a motor；
Valve rod assembly comprising respectively with high pressure phase cam 201, the one-to-one high pressure valve of low pressure phase cam 202
Bar 502, low pressure stem gas 503, the high pressure valve rod 502, low pressure stem gas 503 pass vertically through a valve base 501 and to downward
It stretches, high pressure valve rod 502,503 lower end of low pressure stem gas are connect with the spool of a valve respectively, the high pressure valve rod 502, low pressure stem gas
503 upper ends are equipped with top component 3, and 3 upper end of top component on high pressure valve rod 502 is abutted with high pressure phase cam 201, low pressure
Top component upper end on valve rod 503 is abutted with low pressure phase cam 202, is arranged outside high pressure valve rod 502, low pressure stem gas 503
Have a spring 402,402 lower end of spring is connected on valve base 501, upper end respectively with corresponding 3 lower end of top component
It abuts, the rotation of motor 1 drives the rotation of phase cam component 2 to drive high pressure valve rod 502, low pressure stem gas 503 to move up and down
To make spool move up and down to realize the opening and closing of valve.
Valve actuator for pulse tube expander of the invention is coaxially disposed high pressure phase in 1 shaft 101 of motor
Cam 201 and low pressure phase cam 202 drive high pressure phase cam 201,202 turns of low pressure phase cam when motor 1 rotates
Dynamic, high pressure phase cam 201, the rotation of low pressure phase cam 202 can push corresponding top component 3 to move downward and then make respectively
High pressure valve rod 502, low pressure stem gas 503 move downward, and then move downward corresponding spool, and spring 402 in the process
It is compressed, when spool moves downwardly to minimum point, motor is continued to rotate, and at this time under the effect of 402 restoring force of spring, comes directly towards component
3 move up, and final band movable valve plug moves up, and during spool moves up and down, realize the opening and closing of valve, which is existing
There is valve, air inlet, gas outlet are offered on valve, the conducting realized between air inlet, gas outlet is moved up and down by spool
Be not turned on so that valve opens or closes.In valve actuator of the invention, high pressure phase cam 201, low pressure phase are utilized
The contact of position cam 202 and top component can utmostly reduce the mechanical wear during driving valve motion, extend valve
Door service life.This kind of mode contacts stabilization simultaneously, without lateral force in motion process, it is possible to prevente effectively from valve high frequency motion
Obstruction and slack problem.
In another technical solution, the valve actuator for pulse tube expander, high pressure phase cam 201
It include basic circle section 221, changeover portion 223, peach tip 222 with low pressure phase cam 202, basic circle section 221 passes through two changeover portions 223
It is connect with peach tip 222, when phase cam component 2 is static, top component 3 is contacted with basic circle section 221, and valve is closed, and works as phase
The rotation of cam pack 2 top component 3 is through basic circle section 221, changeover portion 223 with top component 3 in 222 contact process of peach tip to moving down
Movable valve is opened.In the technical scheme, the basic circle section 221 of component 3 and phase cam component 2 is come directly towards when motor 1 does not rotate
Contact, valve is in close state, when motor 1 rotates top component 3 through basic circle section 221, changeover portion 223 gradually with peach tip
222 contacts come directly towards component 3 in the process and move gradually downward, and spring 402 compresses, to drive corresponding spool downward
Mobile, valve opening, motor continues to rotate, and under the restoring force effect of spring 402, top component 3 is moved up, to drive
Corresponding spool moves down, and valve progressively closes off.The structure that Fig. 3 shows that high pressure valve rod 502 is connect with valve spool of valve is shown
It is intended to, which includes valve body 6, offers a cavity 61 in the axial direction on valve body 6, it is covered on the top cover 62 of 6 lower end of valve body,
The air inlet 63 being connected to cavity 61 is equipped on top cover 62 vertically, 6 side of valve body is equipped with the gas outlet 64 being connected to cavity, cavity
Valve core rod 65 is coaxially provided in 61,65 lower end of valve core rod is bolted with spool 66, and cavity inner surface is located at spool 66 and gas outlet 64
Between correspond to 66 both sides of the upper end of spool equipped with sealing surface 67, when spool 66, which is moved downwardly to, to be separated with sealing surface 67, outlet
Mouth 64 is connected to air inlet 63, valve opening；When spool 66, which is moved up to, to be contacted with sealing surface 67, gas outlet 64 and air inlet
Mouth 63 is not connected to, and valve is closed.6 upper end of valve body is coaxially provided with cylinder barrel 7, and high pressure valve rod 502 is same to be located in cylinder barrel 7, gas
It is located at below high pressure valve rod 502 in cylinder barrel 7 and is coaxially provided with axle sleeve 71,71 upper end of axle sleeve connect with high pressure valve rod 502, lower end and valve
Core bar 65 connects, and axle sleeve 71 can move up and down, and high pressure valve rod 502 moves up and down to realize valve with movable valve plug 66 by axle sleeve 71
The opening and closing of door.
In another technical solution, the valve actuator for pulse tube expander, each top component 3 is
Including top contact 301 and top connector 302, the top contact 301 is rolling shaft, and the rolling shaft can be around
The shaft rotation being set on the connector 302 of top, 301 upper end of top contact respectively with high pressure phase cam 201, low
Phase cam 202 is pressed to abut, 301 lower end of the top connector difference high pressure valve rod 502, the connection of 503 upper end of low pressure stem gas, institute
402 upper end of spring is stated to abut with top connector 302.Utilize top contact 301 and high pressure phase cam 201, low pressure phase
The mode that contact is rotated between cam 202 can utmostly reduce the mechanical wear driven during valve motion, extend valve
Door service life.
In another technical solution, the valve actuator for pulse tube expander, the valve base 501
It is equipped with a groove at upper corresponding high pressure valve rod 502, low pressure stem gas 503, a spring-support plate 401 is equipped in the groove, it is described
High pressure valve rod 502,503 lower end of low pressure stem gas both pass through spring-support plate 401, and 402 lower end of spring is connected to the bullet
401 upper surface of spring support plate.Spring-support plate 401 is located on valve base 501, is used to support spring 402, and adjustment spring position
It sets, adjusts restoring force and adapt to different frequency and different pressures.
In another technical solution, the valve actuator for pulse tube expander, the high pressure phase is convex
Wheel 201, low pressure phase cam 202 are fixedly connected by pin with machine shaft, and high pressure phase cam 201, low pressure phase are convex
Pin fixation hole is offered on wheel 202, pin passes through pin fixation hole and connect with machine shaft thus by high pressure phase cam
201, low pressure phase cam 202 is fixed on machine shaft.
In another technical solution, the valve actuator for pulse tube expander, the high pressure phase is convex
It is in a certain angle between the axis of wheel 201 and the axis of the low pressure phase cam 202.That is high pressure phase cam 201 and low pressure
Phase cam 202 folds certain angle, which can realize the timing control of corresponding valve opening and closing, and mode is simple, is conducive to mention
The efficiency of high pulse tube expander.
In another technical solution, the valve actuator for pulse tube expander further includes fixing piece 203
It is coaxially fixed in 1 shaft 101 of motor, and the low pressure phase cam 202 is located at high pressure phase cam 201 and fixing piece 203
Between and it is contacting one another.Fixing piece 203 is located at the outermost of 1 shaft 101 of motor and is coaxially fixed on motor driving shaft, leads to
It crosses tightening fasteners 203 high pressure phase cam 201 and low pressure phase cam 202 are pressed in 1 shaft 101 of motor.
Number of devices and treatment scale described herein are for simplifying explanation of the invention.To application of the invention,
Modifications and variations will be readily apparent to persons skilled in the art.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (7)
1. being used for the valve actuator of pulse tube expander, which is characterized in that including：
Phase cam component comprising high pressure phase cam and low pressure phase cam, the high pressure phase cam and low pressure phase
Cam is coaxially connected on a machine shaft；
Valve rod assembly comprising respectively with high pressure phase cam, the one-to-one high pressure valve rod of low pressure phase cam, low pressure valve
Bar, the high pressure valve rod, low pressure stem gas pass vertically through a valve base, high pressure valve rod, low pressure stem gas lower end respectively with a valve
The spool connection of door, the high pressure valve rod, low pressure stem gas upper end are equipped with top component, the top component upper end on high pressure valve rod
It is abutted with high pressure phase cam, the top component upper end on low pressure stem gas is abutted with low pressure phase cam, high pressure valve rod, low pressure valve
Be arranged with a spring outside bar, the lower spring end is connected on valve base, upper end respectively with corresponding top component lower end
It abuts, the motor rotation drives the rotation of phase cam component to drive high pressure valve rod, low pressure stem gas to move up and down to make valve
Core moves up and down the opening and closing to realize valve.
2. as described in claim 1 be used for pulse tube expander valve actuator, which is characterized in that high pressure phase cam and
Low pressure phase cam includes basic circle section, changeover portion, peach tip, and basic circle section is connect by two changeover portions with peach tip, when phase is convex
When wheel assembly is static, top component is contacted with basic circle section, and valve is closed, when phase cam component rotates top component through basic circle
Top component moves down valve opening in section, changeover portion and peach tip contact process.
3. being used for the valve actuator of pulse tube expander as described in claim 1, which is characterized in that each top component is equal
Including coming directly towards contact and top connector, the top contact is to roll shaft, and the rolling shaft can be pushed up around being set to
Shaft rotation on head connector, the top contact upper end are abutted with high pressure phase cam, low pressure phase cam respectively, institute
Top connector lower end difference high pressure valve rod, the connection of low pressure stem gas upper end are stated, the spring upper end is abutted with top connector.
4. being used for the valve actuator of pulse tube expander as described in claim 1, which is characterized in that on the valve base
It is equipped with a groove at corresponding high pressure valve rod, low pressure stem gas, is equipped with a spring-support plate in the groove, it is the high pressure valve rod, low
Pressure valve bar lower end both passes through spring-support plate, and the lower spring end is connected to the spring-support plate upper surface.
5. being used for the valve actuator of pulse tube expander as described in claim 1, which is characterized in that the high pressure phase is convex
Wheel, low pressure phase cam pass through pin and are fixedly connected with machine shaft.
6. being used for the valve actuator of pulse tube expander as claimed in claim 3, which is characterized in that the high pressure phase is convex
It is in a certain angle between the axis of wheel and the axis of the low pressure phase cam.
7. as described in claim 1 be used for pulse tube expander valve actuator, which is characterized in that further include fixing piece its
It is coaxially fixed on machine shaft, the low pressure phase cam is between high pressure phase cam and fixing piece and adjoins one another
Touching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949114.9A CN108916448B (en) | 2018-08-20 | 2018-08-20 | Valve drive for pulse tube expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949114.9A CN108916448B (en) | 2018-08-20 | 2018-08-20 | Valve drive for pulse tube expander |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108916448A true CN108916448A (en) | 2018-11-30 |
| CN108916448B CN108916448B (en) | 2020-04-10 |
Family
ID=64404862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810949114.9A Active CN108916448B (en) | 2018-08-20 | 2018-08-20 | Valve drive for pulse tube expander |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108916448B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002081980A1 (en) * | 2001-03-30 | 2002-10-17 | Sanyo Electric Co., Ltd. | Stirling refrigerator |
| CN205260912U (en) * | 2015-11-18 | 2016-05-25 | 余成鹏 | Multichannel valve |
| CN106286850A (en) * | 2015-05-27 | 2017-01-04 | 同济大学 | A kind of spool, lifting valve and the application of lifting valve |
| CN106595140A (en) * | 2017-01-19 | 2017-04-26 | 中国科学院理化技术研究所 | Bidirectional phase position adjustable valve and pulse tube expansion machine |
| CN207500517U (en) * | 2017-11-22 | 2018-06-15 | 湖北仙彩色母粒有限公司 | A kind of heating unit cam drive reciprocator |
-
2018
- 2018-08-20 CN CN201810949114.9A patent/CN108916448B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002081980A1 (en) * | 2001-03-30 | 2002-10-17 | Sanyo Electric Co., Ltd. | Stirling refrigerator |
| CN106286850A (en) * | 2015-05-27 | 2017-01-04 | 同济大学 | A kind of spool, lifting valve and the application of lifting valve |
| CN205260912U (en) * | 2015-11-18 | 2016-05-25 | 余成鹏 | Multichannel valve |
| CN106595140A (en) * | 2017-01-19 | 2017-04-26 | 中国科学院理化技术研究所 | Bidirectional phase position adjustable valve and pulse tube expansion machine |
| CN207500517U (en) * | 2017-11-22 | 2018-06-15 | 湖北仙彩色母粒有限公司 | A kind of heating unit cam drive reciprocator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108916448B (en) | 2020-04-10 |
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