CN104633248B - Low-friction piston formula actuator - Google Patents
Low-friction piston formula actuator Download PDFInfo
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- CN104633248B CN104633248B CN201510073299.8A CN201510073299A CN104633248B CN 104633248 B CN104633248 B CN 104633248B CN 201510073299 A CN201510073299 A CN 201510073299A CN 104633248 B CN104633248 B CN 104633248B
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- cylinder body
- piston
- push rod
- ring
- lower cylinder
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
Abstract
The present invention relates to low-friction piston formula actuator.Upper cylinder body and lower cylinder body arrangement symmetrical above and below face-to-face, intermediate hsg are installed between upper cylinder body and lower cylinder body, and upper cylinder body and lower cylinder body are fastenedly connected integral；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；Push rod is connected to piston centre, and the first compression spring is arranged between piston upper surface and upper cylinder body inner surface, and the second compression spring is arranged between piston lower surface and lower cylinder body inner surface；Lower cylinder body is fixedly mounted on support, and cradle top is provided with push rod jack, and push rod is from up to down inserted in support from the push rod jack, external outfan of the push rod lower end for actuator.The present invention can eliminate the Velocity Overshoot produced during actuator quick regulation, and be oriented to accurately, and frictional resistance is little so that actuator can carry out quick response to control signal, so as to reach accurate adjustment purpose.
Description
Technical field
The present invention relates to piston actuator, specifically a kind of with quick response, high accuracy regulation performance
Low-friction piston formula actuator.
Background technology
In prior art, most of piston actuators are using rubber-like sealing rings such as O-ring, Y shape circles as dynamic
Piston seal, using Teflon tap as piston guide part.But during piston action, have compared with serious offense when being installed due to rubber
The amount of being full of, therefore frictional resistance is larger, has a strong impact on the regulation performance of actuator, designs the air rammer that produces and executes machine
Structure is only capable of using as the driving means of general working condition, it is impossible to meets one thousandth or requires the regulating valve of more top adjustment
The application demand of door.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, there is provided a kind of low-friction piston formula executes machine
Structure, its clever structure are reasonable in design, can eliminate the Velocity Overshoot produced during actuator quick regulation, and be oriented to accurately,
Frictional resistance is little so that actuator can carry out quick response to control signal, so as to reach accurate adjustment purpose.
According to the technical scheme that the present invention is provided：Low-friction piston formula actuator, it is characterised in that：Including upper cylinder body,
First compression spring, push rod, piston, intermediate hsg, lower cylinder body and the second compression spring；The upper cylinder body is face-to-face with lower cylinder body
Arrangement symmetrical above and below, intermediate hsg are installed between upper cylinder body and lower cylinder body, and upper cylinder body and lower cylinder body are connected by connector fastening
It is connected into one；The piston is arranged in the endoporus of intermediate hsg, is set between outside piston surface and intermediate hsg bore area
It is equipped with piston seal guidance set；The push rod is connected to piston centre, and first compression spring is arranged on piston upper surface
Between upper cylinder body inner surface, second compression spring is arranged between piston lower surface and lower cylinder body inner surface；Under described
Cylinder body is fixedly mounted on support, and cradle top is provided with push rod jack, and the push rod is from up to down inserted into from the push rod jack
In support, external outfan of the push rod lower end for actuator.
As a further improvement on the present invention, the connector includes hexagon-headed bolt and hex nut, the upper cylinder body,
Along several equally distributed connection through holes are respectively equipped with, the hexagon-headed bolt is passed through for the neighboring of intermediate hsg and lower cylinder body
With hex nut and tight after connection through hole on upper cylinder body, intermediate hsg and lower cylinder body so that upper cylinder body, intermediate hsg and lower cylinder
Body is fastenedly connected integral.
As a further improvement on the present invention, being engaged between face for the upper cylinder body, lower cylinder body and intermediate hsg is divided
First O-ring is not provided with, and the first O-ring is used for the static seal between upper cylinder body, intermediate hsg and lower cylinder body.
As a further improvement on the present invention, the piston seal guidance set includes that arc ptfe ring and tetrafluoro are O-shaped
Circle；It is recessed that the intermediate hsg bore area is from up to down sequentially provided with first annular groove, the second annular groove and the 3rd annular
Groove, the first annular groove and the 3rd annular groove consistent size, first annular groove and the 3rd annular groove are each provided with
One arc ptfe ring, is provided with gap, piston and middle cylinder between the outside piston side face and intermediate hsg bore area
It is oriented to by two arc ptfe rings between lid；A tetrafluoro O-ring, piston is provided with second annular groove
Sealed with the micro interference fit of tetrafluoro O-ring.
As a further improvement on the present invention, the inner headed face of the arc ptfe ring is set to arcwall face.
As a further improvement on the present invention, the piston is the symmetrical tubbiness of upper and lower side.
As a further improvement on the present invention, the outside piston surface is provided with the PTFE coatings of densification.
As a further improvement on the present invention, the piston centre is provided with endoporus, and the push rod is inserted in the endoporus simultaneously
It is locked by locking nut, the push rod outer surface is provided with annular seal groove, is provided with the 2nd O in the annular seal groove
Type circle, second O-ring are used for the static seal that push rod is connected contact with piston.
As a further improvement on the present invention, the base plane of the lower cylinder body is provided with several equally distributed installations and leads to
Hole, the cradle top plane are provided with several equally distributed tapped blind holes, one a pair of the tapped blind hole and installation through-hole
Should, lower cylinder body is fastenedly connected with the hex head screw in tapped blind hole by being mounted in installation through-hole with support.
As a further improvement on the present invention, the cradle top plane is provided with ring-shaped groove, in the ring-shaped groove
The 3rd O-ring is provided with, the 3rd O-ring is used for the sealing between lower cylinder body base plane and cradle top plane.
As a further improvement on the present invention, axle sleeve, axle sleeve and push rod are installed in the push rod jack of the cradle top
Between be provided with push rod pilot seal component.
As a further improvement on the present invention, the push rod pilot seal component include the 4th O-ring, the 5th O-ring and
Oil-free bushing；The outer round surface of the axle sleeve is provided with cylindrical groove, is provided with the 4th O-ring, the 4th O in the cylindrical groove of per pass
Type circle is used for the sealing between support and axle sleeve；If the bore area of the axle sleeve is provided with arterial highway inner hole groove, per pass endoporus
The 5th O-ring is provided with groove, and the 5th O-ring is used for the sealing between push rod and axle sleeve；Also set in the inner hole of shaft sleeve
There are an installation cavity, the oil-free bushing to be mounted in the installation intracavity, oil-free bushing one end is connected with the bottom stage of installation cavity, institute
State push rod to be slidably matched with oil-free bushing.
As a further improvement on the present invention, the push rod lower end is provided with external screw thread, and the frame bottom is provided with circular logical
Hole, the manhole periphery are provided with the manhole of several equally distributed connecting holes, push rod external screw thread and frame bottom
And connecting hole constitutes the attachment structure of external output together.
The present invention compared with prior art, has the advantage that：
（1）, the present invention in piston upper surface and upper cylinder body inner surface between the first compression spring, piston lower surface are set
Second compression spring is set between lower cylinder body inner surface, the first compression spring and the second compression spring occur compression travel with
The overshoot phenomenon produced when can offset actuator quick acting during release compression travel, significantly improves actuator
Stability and modulability.
（2）, the piston in the present invention as air pressure and the converting member of thrust be the symmetrical tubbiness of upper and lower side, and piston
Outer round surface is provided with the PTFE coatings of densification, and it is light-duty that barrel-like structure enables piston to realize on the premise of holding structure intensity
Change；PTFE coatings can effectively reduce frictional resistance during piston movement, while may also operate as piston interface antirust, anti-corrosion
Effect, with stronger adaptive capacity to environment.
（3）, the present invention provide guiding to piston using two arc ptfe rings, arc ptfe ring connect with piston
Contacting surface product is little, and frictional resistance is little to being negligible, while will not weaken guide effect again.
（4）, the present invention using tetrafluoro O-ring as piston dynamic sealing sealing member, tetrafluoro O-ring is O-shaped with General Purpose Rubber
Circle is compared, and assembling magnitude of interference requirement is low, can substantially reduce frictional resistance, and with higher ageing resistance, drop significantly
Low-maintenance cost, saves social resources.
Description of the drawings
Structural representations of the Fig. 1 for the embodiment of the present invention.
Fig. 2 is the A portions enlarged diagram in Fig. 1.
Fig. 3 is the structural representation of arc ptfe ring in Fig. 1.
Fig. 4 is the B portions enlarged diagram in Fig. 1.
Fig. 5 is the structural representation of piston in Fig. 1.
Specific embodiment
With reference to concrete drawings and Examples, the invention will be further described.
As illustrated, the low-friction piston formula actuator in embodiment is mainly by upper cylinder body 1, the first compression spring 2, lock
Tight nut 3, push rod 4, piston 5, intermediate hsg 6, the first O-ring 7, arc ptfe ring 8, tetrafluoro O-ring 9, the second O-ring
10th, hexagon-headed bolt 11, the 3rd O-ring 12, axle sleeve 13, the 4th O-ring 14, the 5th O-ring 15, oil-free bushing 16, support 17,
The parts such as the second hexagon-headed bolt 18, lower cylinder body 19, the second compression spring 20 and hex nut 21 are constituted.
As shown in figure 1, the upper cylinder body 1 and lower cylinder body 19 arrangement symmetrical above and below face-to-face, intermediate hsg 6 is installed in upper cylinder half
Between body 1 and lower cylinder body 19, upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19 are fastenedly connected integral by connector.Embodiment
In connector be mainly made up of hexagon-headed bolt 11 and hex nut 21, the upper cylinder body 1, intermediate hsg 6 and lower cylinder body
Along several equally distributed connection through holes are respectively equipped with, the hexagon-headed bolt 11 is through upper cylinder body 1, centre for 19 neighboring
With hex nut 21 and tight after connection through hole on cylinder cap 6 and lower cylinder body 19 so that upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19
It is fastenedly connected integral.
As shown in Figure 1 and Figure 2, in the embodiment of the present invention, the upper cylinder body 1, the contact with intermediate hsg 6 of lower cylinder body 19 are matched somebody with somebody
The first O-ring 7 is respectively equipped between conjunction face, and the first O-ring 7 is used between upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19
Static seal.
As shown in Fig. 1 ~ Fig. 3, the piston 5 is arranged in the endoporus of intermediate hsg 6,5 outer round surface of piston and middle cylinder
Piston seal guidance set is provided between 6 bore area of lid；Piston seal guidance set in embodiment is mainly by arc
Ptfe ring 8 and tetrafluoro O-ring 9 are constituted；6 bore area of the intermediate hsg be from up to down sequentially provided with first annular groove,
Bicyclo- connected in star and the 3rd annular groove, the first annular groove and the 3rd annular groove consistent size, first annular groove
An arc ptfe ring 8,5 outer circumference surface of the piston and 6 bore area of intermediate hsg are each provided with the 3rd annular groove
Between be provided with gap, be oriented to by two arc ptfe rings 8 between piston 5 and intermediate hsg 6, arc ptfe ring 8
Little with the contact area of piston 5, frictional resistance is little to being negligible, while will not weaken guide effect again.Described second
A tetrafluoro O-ring 9 is provided with annular groove, and piston 5 is sealed with 9 micro interference fit of tetrafluoro O-ring, and tetrafluoro is O-shaped
, compared with General Purpose Rubber O-ring, assembling magnitude of interference requirement is low for circle 9, can substantially reduce frictional resistance, and resist with higher
Aging ability, substantially reduces maintenance cost, saves social resources.
As shown in figure 5, in the embodiment of the present invention, the piston 5 is that the symmetrical tubbiness of upper and lower side, 5 outer round surface of piston set
There are the PTFE coatings 22 of densification.The inner headed face of the arc ptfe ring 8 is set to arcwall face.Barrel-like structure enables piston 5
Lightness is realized on the premise of holding structure intensity；PTFE coatings 22 can effectively reduce frictional resistance when piston 5 is moved,
5 contact surface antirust of piston, antisepsises may also operate as simultaneously, with stronger adaptive capacity to environment.
As shown in figure 1, the push rod 4 is connected to 5 center of piston, 5 center of piston is provided with endoporus, and the push rod 4 is inserted into
It is locked in the endoporus and by locking nut 3；4 outer surface of the push rod is provided with annular seal groove, the ring packing
The second O-ring 10 is provided with groove, and second O-ring 10 is used for the static seal that push rod 4 is connected contact with piston 5.
As shown in figure 1, first compression spring 2 is arranged between 1 inner surface of 5 upper surface of piston and upper cylinder body, described
Second compression spring 20 is arranged between 19 inner surface of 5 lower surface of piston and lower cylinder body；First compression spring 2, second compresses bullet
Spring 20 with during 5 action of piston, occur compression travel and release compression travel can reverse drive change, actuator can be offset fast
Quick-action as when the overshoot phenomenon that produces, significantly improve the stability and modulability of actuator.
As shown in figure 1, the 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-hole, 17 top planes of the support are provided with several equally distributed tapped blind holes, and the screw thread is blind
Hole and installation through-hole are corresponded, and lower cylinder body 19 and support 17 are by the hex head screw that is mounted in installation through-hole and tapped blind hole
18 are fastenedly connected；17 top planes of the support are provided with ring-shaped groove, are provided with the 3rd O-ring 12 in the ring-shaped groove, the
Three O-rings 12 are used for the sealing between 17 top planes of 19 base plane of lower cylinder body and support.
As shown in figure 1, being provided with push rod jack at the top of the support 17, the push rod 4 is from up to down inserted from the push rod jack
Enter in support 17；Axle sleeve 13 is installed in the push rod jack at the top of the support 17, is provided between axle sleeve 13 and push rod 4 and is pushed away
Bar pilot seal component.The structure of the push rod pilot seal component is as shown in figure 4, which is mainly by the 4th O-ring 14, the 5th O
Type circle 15 and oil-free bushing 16 are constituted；The outer round surface of the axle sleeve 13 is provided with cylindrical groove, is provided with one in the cylindrical groove of per pass
Individual 4th O-ring 14, the 4th O-ring 14 are used for the sealing between support 17 and axle sleeve 13；The bore area of the axle sleeve 13 sets
If being equipped with arterial highway inner hole groove, the 5th O-ring 15 in per pass inner hole groove, is provided with, the 5th O-ring 15 is used for push rod 4 and axle
Sealing between set 13；An installation cavity is additionally provided with 13 endoporus of the axle sleeve, and the oil-free bushing 16 is mounted in the installation intracavity,
16 one end of oil-free bushing is connected with the bottom stage of installation cavity, and the push rod 4 is slidably matched with oil-free bushing 16.
As shown in figure 1, external outfan of 4 lower end of the push rod for actuator.4 lower end of push rod is provided with external screw thread, institute
State 17 bottom of support and be provided with manhole, the manhole periphery is provided with several equally distributed connecting holes, 4 outer spiral shell of push rod
The manhole and connecting hole of 17 bottom of stricture of vagina and support constitutes the attachment structure of external output together.
Claims (6)
1. low-friction piston formula actuator, it is characterised in that：Including upper cylinder body（1）, the first compression spring（2）, push rod（4）、
Piston（5）, intermediate hsg（6）, lower cylinder body（19）With the second compression spring（20）；The upper cylinder body（1）With lower cylinder body（19）Face
Opposite arrangement symmetrical above and below, intermediate hsg（6）It is installed in upper cylinder body（1）With lower cylinder body（19）Between, upper cylinder body（1）, and lower cylinder
Body（19）It is fastenedly connected by connector integral；The piston（5）It is arranged on intermediate hsg（6）Endoporus in, piston（5）Outward
Circular surfaces and intermediate hsg（6）Piston seal guidance set is provided between bore area；The push rod（4）It is connected to piston
（5）Center, first compression spring（2）It is arranged on piston（5）Upper surface and upper cylinder body（1）Between inner surface, described second
Compression spring（20）It is arranged on piston（5）Lower surface and lower cylinder body（19）Between inner surface；The lower cylinder body（19）Fixed installation
In support（17）On, support（17）Top is provided with push rod jack, the push rod（4）From up to down it is inserted into from the push rod jack and props up
Frame（17）Interior, push rod（4）External outfan of the lower end for actuator；
The piston seal guidance set includes arc ptfe ring（8）With tetrafluoro O-ring（9）；The intermediate hsg（6）Endoporus
Surface is from up to down sequentially provided with first annular groove, the second annular groove and the 3rd annular groove, the first annular groove
With the 3rd annular groove consistent size, first annular groove and the 3rd annular groove are each provided with an arc ptfe ring（8）,
The piston（5）Outer circumference surface and intermediate hsg（6）Gap, piston is provided between bore area（5）With intermediate hsg（6）Between
By two arc ptfe rings（8）It is oriented to；A tetrafluoro O-ring is provided with second annular groove（9）, piston
（5）With tetrafluoro O-ring（9）Micro interference fit is sealed；The arc ptfe ring（8）Inner headed face be set to arcwall face.
2. low-friction piston formula actuator as claimed in claim 1, it is characterised in that：The connector includes turret head spiral shell
Bolt（11）And hex nut（21）, the upper cylinder body（1）, intermediate hsg（6）And lower cylinder body（19）Neighboring along being respectively equipped with
Several equally distributed connection through holes, the hexagon-headed bolt（11）Pass through upper cylinder body（1）, intermediate hsg（6）And lower cylinder body
（19）On connection through hole after use hex nut（21）And tight so that upper cylinder body（1）, intermediate hsg（6）And lower cylinder body（19）Tightly
It is solidly connected integral.
3. low-friction piston formula actuator as claimed in claim 1, it is characterised in that：The upper cylinder body（1）, lower cylinder body
（19）With intermediate hsg（6）Be engaged between face and be respectively equipped with the first O-ring（7）.
4. low-friction piston formula actuator as claimed in claim 1, it is characterised in that：The piston（5）Outer round surface sets
There are the PTFE coatings of densification（22）.
5. low-friction piston formula actuator as claimed in claim 1, it is characterised in that：The piston（5）In center is provided with
Hole, the push rod（4）It is inserted in the endoporus and by locking nut（3）It is locked；The push rod（4）Outer surface is provided with
Annular seal groove, is provided with the second O-ring in the annular seal groove（10）.
6. low-friction piston formula actuator as claimed in claim 1, it is characterised in that：The lower cylinder body（19）Bottom put down
Face is provided with several equally distributed installation through-holes, the support（17）It is blind that top planes are provided with several equally distributed screw threads
Hole, the tapped blind hole are corresponded with installation through-hole, lower cylinder body（19）With support（17）By being mounted in installation through-hole and screw thread
Hex head screw in blind hole（18）It is fastenedly connected；The support（17）Top planes are provided with ring-shaped groove, the annular ditch
The 3rd O-ring is provided with groove（12）.
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 CN104633248A (en) | 2015-05-20 |
| CN104633248B true CN104633248B (en) | 2017-03-15 |
Family
ID=53212313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510073299.8A Active CN104633248B (en) | 2015-02-10 | 2015-02-10 | Low-friction piston formula actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104633248B (en) |
Family Cites Families (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 |
| 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 |
| 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 |
| 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
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| CN104633248A (en) | 2015-05-20 |
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