CN104633248A - Low-frictional piston type actuator - Google Patents
Low-frictional piston type actuator Download PDFInfo
- Publication number
- CN104633248A CN104633248A CN201510073299.8A CN201510073299A CN104633248A CN 104633248 A CN104633248 A CN 104633248A CN 201510073299 A CN201510073299 A CN 201510073299A CN 104633248 A CN104633248 A CN 104633248A
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- China
- Prior art keywords
- cylinder body
- piston
- push rod
- type circle
- lower cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
Abstract
The invention relates to a low-frictional piston type actuator. An upper cylinder body is vertically and symmetrically arranged with a lower cylinder body face to face, a middle cylinder cover is clamped between the upper cylinder body and the lower cylinder body, and the upper cylinder body and the lower cylinder body are fastened and connected into one; the piston is arranged in an inner hole of the middle cylinder cover, a piston sealing guide component is arranged between an outer circle surface of the piston and an inner hole surface of the middle cylinder cover; a push rod is connected to the center of the piston, a first compression spring is arranged between the upper surface of the piston and the inner surface of the upper cylinder body, a second compression spring is arranged between the lower surface of the piston and the inner surface of the lower cylinder body; the lower cylinder body is fixed on a bracket, and the top part of the bracket is provided with a push rod inserting hole, and the push rod is inserted to the bracket from top to bottom through the push rod inserting hole; the lower end of the push rod is an external output end of the actuator. The low-frictional piston type actuator can remove the speed overshoot generated in the course of rapidly adjusting the actuator; moreover, the guidance is accurate and frictional resistance is small, so that the actuator can rapidly respond the control signal, and thereby reaching the purpose of accurately adjusting.
Description
Technical field
The present invention relates to piston actuator, specifically a kind of low-friction piston formula actuator with quick response, highi degree of accuracy adjusting function.
Background technique
In prior art, most of piston actuator adopts the rubber-like seal rings such as O type circle, Y shape circle as dynamic piston seal, adopts Teflon tap as piston guide part.But in piston action process, owing to having larger magnitude of interference when rubber is installed, therefore surface friction drag is larger, have a strong impact on the adjusting function of actuator, design the pneumatic piston actuating mechanism produced only to use as the drive unit of general working condition, the application demand of the regulating valve of a thousandth or the higher modulability of requirement can not be met.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of low-friction piston formula actuator is provided, its structure is ingenious, reasonable in design, the Velocity Overshoot produced when can eliminate actuator's quick adjustment, and guiding is accurately, and surface friction drag is little, actuator can be responded fast to control signal, thus reach fine adjustment object.
According to technological scheme provided by the invention: low-friction piston formula actuator, is characterized in that: comprise upper cylinder body, the first Compress Spring, push rod, piston, intermediate hsg, lower cylinder body and the second Compress Spring; Described upper cylinder body and lower cylinder body are arranged symmetrically with face-to-face up and down, and intermediate hsg is installed between upper cylinder body and lower cylinder body, and upper cylinder body and lower cylinder body are fastenedly connected integral by link; Described piston is arranged in the endoporus of intermediate hsg, is provided with piston seal guidance set between outside piston surface and intermediate hsg bore area; Described push rod is connected to piston centre, and described first Compress Spring is arranged between piston upper surface and upper cylinder body internal surface, and described second Compress Spring is arranged between piston lower surface and lower cylinder body internal surface; Described lower cylinder body is fixedly mounted on support, and cradle top is provided with push rod jack, and described push rod is from up to down inserted in support from this push rod jack, and push rod lower end is the external output terminal of actuator.
As a further improvement on the present invention, described link comprises hexagon head bolt and hexagon nut, the outer periphery of described upper cylinder body, intermediate hsg and lower cylinder body is along being respectively equipped with several equally distributed connecting through holes, described hexagon head bolt, through also tight with hexagon nut after the connecting through hole on upper cylinder body, intermediate hsg and lower cylinder body, makes upper cylinder body, intermediate hsg and lower cylinder body be fastenedly connected integral.
As a further improvement on the present invention, be respectively equipped with an O type circle between the contact fitting surface of described upper cylinder body, lower cylinder body and intermediate hsg, an O type circle is used for the static seal between upper cylinder body, intermediate hsg and lower cylinder body.
As a further improvement on the present invention, described piston seal guidance set comprises arc ptfe ring and tetrafluoro O type circle; Described intermediate hsg bore area is from up to down provided with first ring connected in star, the second annular groove and the 3rd annular groove in turn, described first ring connected in star and the 3rd annular groove consistent size, first ring connected in star and the 3rd annular groove are respectively provided with an arc ptfe ring, be provided with gap between described outside piston side face and intermediate hsg bore area, led by two arc ptfe rings between piston and intermediate hsg; Be provided with a tetrafluoro O type circle in described second annular groove, piston and tetrafluoro O type circle trace interference fit seal.
As a further improvement on the present invention, the inner headed face of described arc ptfe ring is set to arc shaped surface.
As a further improvement on the present invention, described piston is the tubbiness of upper and lower end symmetry.
As a further improvement on the present invention, described outside piston surface is provided with fine and close PTFE coating.
As a further improvement on the present invention, described piston centre is provided with endoporus, described push rod to be inserted in this endoporus and to be locked by locking nut, described push rod outer surface is provided with annular seal groove, be provided with the 2nd O type circle in described annular seal groove, the 2nd O type circle is used for the static seal that push rod contacts with piston.
As a further improvement on the present invention, the base plane of described lower cylinder body is provided with several equally distributed installation through holes, described cradle top plane is provided with several equally distributed tapped blind holes, described tapped blind hole and installation through hole one_to_one corresponding, lower cylinder body and support are fastenedly connected by being contained in the hex head screw installed in through hole and tapped blind hole.
As a further improvement on the present invention, described cradle top plane is provided with annular groove, is provided with the 3rd O type circle in described annular groove, and the 3rd O type circle is used for the sealing between lower cylinder body base plane and cradle top plane.
As a further improvement on the present invention, in the push rod jack of described cradle top, axle sleeve is installed, between axle sleeve and push rod, is provided with push rod pilot seal assembly.
As a further improvement on the present invention, described push rod pilot seal assembly comprises the 4th O type circle, the 5th O type circle and without oily lining; The outer round surface of described axle sleeve is provided with cylindrical groove, is provided with a 4th O type circle in per pass cylindrical groove, and the 4th O type circle is used for the sealing between support and axle sleeve; The bore area of described axle sleeve is provided with some roads inner hole groove, is provided with a 5th O type circle in per pass inner hole groove, and the 5th O type circle is used for the sealing between push rod and axle sleeve; Also be provided with an installation cavity in described inner hole of shaft sleeve, be describedly contained in this installation cavity without oily lining, be connected with the bottom stage of installation cavity without oily lining one end, described push rod be slidably matched without oily lining.
As a further improvement on the present invention, described push rod lower end is provided with outside thread, described frame bottom is provided with manhole, described manhole periphery is provided with several equally distributed attachment holes, forms the linkage structure externally exported together with the manhole of push rod outside thread and frame bottom and attachment hole.
compared with prior art, tool has the following advantages in the present invention:
(1) piston upper surface, in the present invention and between upper cylinder body internal surface, the first Compress Spring is set, second Compress Spring is set between piston lower surface and lower cylinder body internal surface, the overshoot phenomenon that first Compress Spring and the second Compress Spring produce when can offset actuator's quick acting in the process that compression stroke and release compression stroke occur, significantly improves stability and the modulability of actuator.
(2), be the tubbiness of upper and lower end symmetry in the present invention as the piston of the converting member of air pressure and thrust, and outside piston surface is provided with fine and close PTFE coating, and barrel-like structure makes piston can realize light under the prerequisite of holding structure intensity; PTFE coating effectively can reduce surface friction drag during piston movement, can also play that piston interface is antirust, antisepsis simultaneously, has stronger adaptive capacity to environment.
(3), the present invention adopts two arc ptfe rings to provide guiding to piston, and the area of contact of arc ptfe ring and piston is little, and surface friction drag is little of negligible, can not weaken guide effect again simultaneously.
(4), the present invention adopts tetrafluoro O type circle as the Sealing of piston motive sealing, and tetrafluoro O type circle is compared with General Purpose Rubber O type circle, and assembling magnitude of interference requires low, greatly can reduce surface friction drag, and there is stronger ageing resistance, greatly reduce maintenance cost, save social resources.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the A portion enlarged diagram in Fig. 1.
Fig. 3 is the structural representation of arc ptfe ring in Fig. 1.
Fig. 4 is the B portion enlarged diagram in Fig. 1.
Fig. 5 is the structural representation of piston in Fig. 1.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in the figure, the low-friction piston formula actuator in embodiment primarily of upper cylinder body 1, first Compress Spring 2, locking nut 3, push rod 4, piston 5, intermediate hsg 6, an O type circle 7, arc ptfe ring 8, tetrafluoro O type circle the 9, the 2nd O type circle 10, hexagon head bolt 11, the 3rd O type circle 12, axle sleeve 13, the 4th O type circle the 14, the 5th O type circle 15, without the part such as oily lining 16, support 17, second hexagon head bolt 18, lower cylinder body 19, second Compress Spring 20 and hexagon nut 21 composition.
As shown in Figure 1, described upper cylinder body 1 is arranged symmetrically with face-to-face up and down with lower cylinder body 19, and intermediate hsg 6 is installed between upper cylinder body 1 and lower cylinder body 19, and upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19 are fastenedly connected integral by link.Link in embodiment is mainly made up of hexagon head bolt 11 and hexagon nut 21, the outer periphery of described upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19 is along being respectively equipped with several equally distributed connecting through holes, described hexagon head bolt 11, through also tight with hexagon nut 21 after the connecting through hole on upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19, makes upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19 be fastenedly connected integral.
As shown in Figure 1 and Figure 2, in the embodiment of the present invention, described upper cylinder body 1, be respectively equipped with O type circle the 7, an one O type circle 7 between lower cylinder body 19 and the contact fitting surface of intermediate hsg 6 for the static seal between upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19.
As shown in Fig. 1 ~ Fig. 3, described piston 5 is arranged in the endoporus of intermediate hsg 6, is provided with piston seal guidance set between piston 5 outer round surface and intermediate hsg 6 bore area, piston seal guidance set in embodiment forms primarily of arc ptfe ring 8 and tetrafluoro O type circle 9, described intermediate hsg 6 bore area is from up to down provided with first ring connected in star in turn, second annular groove and the 3rd annular groove, described first ring connected in star and the 3rd annular groove consistent size, first ring connected in star and the 3rd annular groove are respectively provided with an arc ptfe ring 8, gap is provided with between described piston 5 outer peripheral surface and intermediate hsg 6 bore area, led by two arc ptfe rings 8 between piston 5 and intermediate hsg 6, arc ptfe ring 8 is little with the area of contact of piston 5, surface friction drag is little of negligible, guide effect can not be weakened again simultaneously.A tetrafluoro O type circle 9 is provided with in described second annular groove, piston 5 and the micro-interference fit of tetrafluoro O type circle 9 seal, tetrafluoro O type circle 9 is compared with General Purpose Rubber O type circle, assembling magnitude of interference requires low, greatly can reduce surface friction drag, and there is stronger ageing resistance, greatly reduce maintenance cost, save social resources.
As shown in Figure 5, in the embodiment of the present invention, described piston 5 is the tubbiness of upper and lower end symmetry, and piston 5 outer round surface is provided with fine and close PTFE coating 22.The inner headed face of described arc ptfe ring 8 is set to arc shaped surface.Barrel-like structure makes piston 5 can realize light under the prerequisite of holding structure intensity; PTFE coating 22 effectively can reduce surface friction drag when piston 5 moves, and can also play that piston 5 surface of contact is antirust, antisepsis simultaneously, has stronger adaptive capacity to environment.
As shown in Figure 1, described push rod 4 is connected to piston 5 center, and piston 5 center is provided with endoporus, and described push rod 4 to be inserted in this endoporus and to be locked by locking nut 3; Described push rod 4 outer surface is provided with annular seal groove, is provided with the static seal that the 2nd O type circle the 10, two O type circle 10 contacts with piston 5 for push rod 4 in described annular seal groove.
As shown in Figure 1, described first Compress Spring 2 is arranged between piston 5 upper surface and upper cylinder body 1 internal surface, and described second Compress Spring 20 is arranged between piston 5 lower surface and lower cylinder body 19 internal surface; When first Compress Spring 2, second Compress Spring 20 is with piston 5 action, compression stroke occurs and discharges can changing by reverse drive of compression stroke, the overshoot phenomenon produced when can offset actuator's quick acting, significantly improves stability and the modulability of actuator.
As shown in Figure 1, described lower cylinder body 19 is fixedly mounted on support 17, the base plane of lower cylinder body 19 is provided with several equally distributed installation through holes, described support 17 top planes is provided with several equally distributed tapped blind holes, described tapped blind hole and installation through hole one_to_one corresponding, lower cylinder body 19 and support 17 are fastenedly connected by being contained in the hex head screw 18 installed in through hole and tapped blind hole; Described support 17 top planes is provided with annular groove, is provided with the 3rd O type circle the 12, three O type circle 12 for the sealing between lower cylinder body 19 base plane and support 17 top planes in described annular groove.
As shown in Figure 1, described support 17 top is provided with push rod jack, and described push rod 4 is from up to down inserted in support 17 from this push rod jack; In the push rod jack at described support 17 top, axle sleeve 13 is installed, between axle sleeve 13 and push rod 4, is provided with push rod pilot seal assembly.As shown in Figure 4, it is primarily of the 4th O type circle the 14, the 5th O type circle 15 and form without oily lining 16 for the structure of described push rod pilot seal assembly; The outer round surface of described axle sleeve 13 is provided with cylindrical groove, is provided with the 4th O type circle the 14, a four O type circle 14 for the sealing between support 17 and axle sleeve 13 in per pass cylindrical groove; The bore area of described axle sleeve 13 is provided with some roads inner hole groove, is provided with the 5th O type circle the 15, a five O type circle 15 for the sealing between push rod 4 and axle sleeve 13 in per pass inner hole groove; Also be provided with an installation cavity in described axle sleeve 13 endoporus, be describedly contained in this installation cavity without oily lining 16, be connected with the bottom stage of installation cavity without oily lining 16 one end, described push rod 4 be slidably matched without oily lining 16.
As shown in Figure 1, described push rod 4 lower end is the external output terminal of actuator.Push rod 4 lower end is provided with outside thread, is provided with manhole bottom described support 17, and described manhole periphery is provided with several equally distributed attachment holes, and push rod 4 outside thread forms the linkage structure externally exported together with the manhole bottom support 17 and attachment hole.
Claims (10)
1. low-friction piston formula actuator, is characterized in that: comprise upper cylinder body (1), the first Compress Spring (2), push rod (4), piston (5), intermediate hsg (6), lower cylinder body (19) and the second Compress Spring (20); Described upper cylinder body (1) and lower cylinder body (19) are arranged symmetrically with face-to-face up and down, and intermediate hsg (6) is installed between upper cylinder body (1) and lower cylinder body (19), and upper cylinder body (1) and lower cylinder body (19) are fastenedly connected integral by link; Described piston (5) is arranged in the endoporus of intermediate hsg (6), is provided with piston seal guidance set between piston (5) outer round surface and intermediate hsg (6) bore area; Described push rod (4) is connected to piston (5) center, described first Compress Spring (2) is arranged between piston (5) upper surface and upper cylinder body (1) internal surface, and described second Compress Spring (20) is arranged between piston (5) lower surface and lower cylinder body (19) internal surface; Described lower cylinder body (19) is fixedly mounted on support (17), and support (17) top is provided with push rod jack, and described push rod (4) is from up to down inserted in support (17) from this push rod jack, and push rod (4) lower end is the external output terminal of actuator.
2. low-friction piston formula actuator as claimed in claim 1, it is characterized in that: described link comprises hexagon head bolt (11) and hexagon nut (21), the outer periphery of described upper cylinder body (1), intermediate hsg (6) and lower cylinder body (19) is along being respectively equipped with several equally distributed connecting through holes, described hexagon head bolt (11) is through using hexagon nut (21) after the connecting through hole on upper cylinder body (1), intermediate hsg (6) and lower cylinder body (19) and tightly, making upper cylinder body (1), intermediate hsg (6) and lower cylinder body (19) be fastenedly connected integral.
3. low-friction piston formula actuator as claimed in claim 1, is characterized in that: described upper cylinder body (1), be respectively equipped with an O type circle (7) between lower cylinder body (19) and the contact fitting surface of intermediate hsg (6).
4. low-friction piston formula actuator as claimed in claim 1, is characterized in that: described piston seal guidance set comprises arc ptfe ring (8) and tetrafluoro O type circle (9); Described intermediate hsg (6) bore area is from up to down provided with first ring connected in star, the second annular groove and the 3rd annular groove in turn, described first ring connected in star and the 3rd annular groove consistent size, first ring connected in star and the 3rd annular groove are respectively provided with an arc ptfe ring (8), be provided with gap between described piston (5) outer peripheral surface and intermediate hsg (6) bore area, led by two arc ptfe rings (8) between piston (5) and intermediate hsg (6); Be provided with tetrafluoro O type circle (9) in described second annular groove, piston (5) and tetrafluoro O type circle (9) micro-interference fit seal.
5. low-friction piston formula actuator as claimed in claim 4, is characterized in that: the inner headed face of described arc ptfe ring (8) is set to arc shaped surface.
6. low-friction piston formula actuator as claimed in claim 1, is characterized in that: described piston (5) outer round surface is provided with fine and close PTFE coating (22).
7. low-friction piston formula actuator as claimed in claim 1, is characterized in that: described piston (5) center is provided with endoporus, and described push rod (4) to be inserted in this endoporus and to be locked by locking nut (3); Described push rod (4) outer surface is provided with annular seal groove, is provided with the 2nd O type circle (10) in described annular seal groove.
8. low-friction piston formula actuator as claimed in claim 1, it is characterized in that: the base plane of described lower cylinder body (19) is provided with several equally distributed installation through holes, described support (17) top planes is provided with several equally distributed tapped blind holes, described tapped blind hole and installation through hole one_to_one corresponding, lower cylinder body (19) and support (17) are fastenedly connected by being contained in the hex head screw (18) installed in through hole and tapped blind hole; Described support (17) top planes is provided with annular groove, is provided with the 3rd O type circle (12) in described annular groove.
9. low-friction piston formula actuator as claimed in claim 1, is characterized in that: be provided with axle sleeve (13) in the push rod jack at described support (17) top, is provided with push rod pilot seal assembly between axle sleeve (13) and push rod (4).
10. low-friction piston formula actuator as claimed in claim 9, is characterized in that: described push rod pilot seal assembly comprises the 4th O type circle (14), the 5th O type circle (15) and without oily lining (16); The outer round surface of described axle sleeve (13) is provided with cylindrical groove, is provided with a 4th O type circle (14) in per pass cylindrical groove; The bore area of described axle sleeve (13) is provided with some roads inner hole groove, is provided with a 5th O type circle (15) in per pass inner hole groove; Also be provided with an installation cavity in described axle sleeve (13) endoporus, be describedly contained in this installation cavity without oily lining (16), be connected with the bottom stage of installation cavity without oily lining (16) one end, described push rod (4) be slidably matched without oily lining (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510073299.8A CN104633248B (en) | 2015-02-10 | 2015-02-10 | Low-friction piston formula actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510073299.8A CN104633248B (en) | 2015-02-10 | 2015-02-10 | Low-friction piston formula actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104633248A true CN104633248A (en) | 2015-05-20 |
| CN104633248B CN104633248B (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510073299.8A Active CN104633248B (en) | 2015-02-10 | 2015-02-10 | Low-friction piston formula actuator |
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| CN (1) | CN104633248B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3958592A (en) * | 1974-02-06 | 1976-05-25 | Willis Oil Tool Co. | Safety shut-off valve |
| CN201502775U (en) * | 2009-09-23 | 2010-06-09 | 重庆布莱迪仪器仪表有限公司 | Superposition double-cylinder actuating mechanism |
| CN201705943U (en) * | 2010-06-13 | 2011-01-12 | 无锡智能自控工程有限公司 | Integrated push rod sealing assembly |
| CN203627994U (en) * | 2013-11-20 | 2014-06-04 | 无锡智能自控工程股份有限公司 | Integrated upper and lower flow limiting adjustment mechanism of diaphragm actuator |
| CN203686185U (en) * | 2013-11-20 | 2014-07-02 | 无锡智能自控工程股份有限公司 | Valve rod and push rod integrated high-pressure plunger angle valve |
| CN203784427U (en) * | 2013-11-20 | 2014-08-20 | 无锡智能自控工程股份有限公司 | Compact double-buffering piston type fast actuation mechanism |
| CN204533748U (en) * | 2015-02-10 | 2015-08-05 | 无锡智能自控工程股份有限公司 | Low-friction piston formula actuator |
-
2015
- 2015-02-10 CN CN201510073299.8A patent/CN104633248B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3958592A (en) * | 1974-02-06 | 1976-05-25 | Willis Oil Tool Co. | Safety shut-off valve |
| CN201502775U (en) * | 2009-09-23 | 2010-06-09 | 重庆布莱迪仪器仪表有限公司 | Superposition double-cylinder actuating mechanism |
| CN201705943U (en) * | 2010-06-13 | 2011-01-12 | 无锡智能自控工程有限公司 | Integrated push rod sealing assembly |
| CN203627994U (en) * | 2013-11-20 | 2014-06-04 | 无锡智能自控工程股份有限公司 | Integrated upper and lower flow limiting adjustment mechanism of diaphragm actuator |
| CN203686185U (en) * | 2013-11-20 | 2014-07-02 | 无锡智能自控工程股份有限公司 | Valve rod and push rod integrated high-pressure plunger angle valve |
| CN203784427U (en) * | 2013-11-20 | 2014-08-20 | 无锡智能自控工程股份有限公司 | Compact double-buffering piston type fast actuation mechanism |
| CN204533748U (en) * | 2015-02-10 | 2015-08-05 | 无锡智能自控工程股份有限公司 | Low-friction piston formula actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104633248B (en) | 2017-03-15 |
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