CN203176048U - Air discharging groove pressure equalizing type air-suspending friction-free cylinder - Google Patents
Air discharging groove pressure equalizing type air-suspending friction-free cylinder Download PDFInfo
- Publication number
- CN203176048U CN203176048U CN 201220750033 CN201220750033U CN203176048U CN 203176048 U CN203176048 U CN 203176048U CN 201220750033 CN201220750033 CN 201220750033 CN 201220750033 U CN201220750033 U CN 201220750033U CN 203176048 U CN203176048 U CN 203176048U
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- Prior art keywords
- piston
- air
- cylinder
- cylinder barrel
- friction
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- 238000007599 discharging Methods 0.000 title abstract 5
- 239000000725 suspension Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
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Abstract
An air discharging groove pressure equalizing type air-suspending friction-free cylinder comprises a cylinder barrel, a piston and a piston rod, wherein the piston is fixedly connected with one end of the piston rod, a base is installed at one end of the cylinder barrel, an end cap is installed at the other end of the cylinder barrel, an air source inlet is formed in the base, the inner wall of the cylinder barrel is connected with an outer ring of an air bearing, the piston rod penetrates through an inner ring of the air bearing and the end cap, a rod chamber of the cylinder barrel is provided with an air outlet, throttling holes are uniformly distributed in the piston in the radial direction, one side, close to a rodless chamber, of an outer cylindrical surface of the piston is provided with a circle of grooves, blind holes are punched from the upper portion of the grooves in the radial direction, then through holes are punched from the wall of the piston to the direction of the rod chamber, and air discharging grooves are formed. The air discharging grooves are isolated from the throttling holes. The air discharging groove pressure equalizing type air-suspending friction-free cylinder effectively prevents high-low pressure airflow from affecting an air film and is high in control precision.
Description
Technical field
The utility model relates to a kind of air supporting cylinder.
Background technique
Cylinder is made up of cylinder barrel, end cap, piston, piston rod and Sealing etc. as the executive component of pneumatic system, and compressed-air actuated pressure can be converted to mechanical energy, and driving mechanism is done straight reciprocating motion, swings and rotatablely moved.
Common cylinder often adopts mechanical seal, has bigger frictional force between cylinder barrel and the piston.Traditional low friction cylinder relies on the raising machining accuracy, adopts special low-friction material or grease lubrication to reduce friction.Perhaps improve seal form, the special sealing technique of German FESTO company's employing is applied to cylinder, adopts the one-way sealing circle, has very little resistance of taxing.Japan SMC company adopts ball guide sleeve technology and Gap Sealing Technology, has overcome the shortcoming of traditional low friction cylinder.
For satisfying the requirement of aspects such as ultraprecise constant force output control, minute-pressure action control, the gas lubrication technology is realizing that zero friction cylinder is applied.A kind of gas suspension does not have friction cylinder technology, leave minimum gap between cylinder barrel and the piston, and at piston radial the even throttle orifice that distributes is set, pressurized air in employing cylinder self cavity volume is as oiling agent, gas is introduced in the gap, make piston be in complete state of suspension in cylinder, piston does not contact each other with cylinder barrel, thereby has eliminated the frictional force between the piston and cylinder barrel in the air cylinder structure.But, owing to leave the gap between piston and the cylinder barrel, there is very big draught head between the hyperbaric chamber of cylinder and the low-pressure cavity, thereby between the gap, can form air pressure stream, directly influence the air pressure film that piston forms in the gap by throttle orifice, cause air-film thickness, pressure distribution inhomogeneous, stability, precision, the bearing capacity of this nothing friction cylinder all caused influence.
Summary of the invention
In order to overcome high low pressure air-flow that existing gas suspension do not have the friction cylinder to the deficiency that air film exerts an influence, control accuracy is lower, the utility model provides a kind of high low pressure air-flow of effectively avoiding that the air drain even pressure type gas suspension that unloads that air film exerts an influence, control accuracy is higher is not had the friction cylinder.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of air drain even pressure type gas suspension that unloads does not have the friction cylinder, comprise cylinder barrel, piston and piston rod, described piston is fixedlyed connected with piston rod one end, described cylinder barrel one end mounting base, the other end of described cylinder barrel is installed end cap, described base is provided with gas source air inlet, the inwall of described cylinder barrel is connected with the air-bearing outer ring, described piston rod passes inner ring and the end cap of air-bearing, the rod chamber of cylinder barrel is provided with the air outlet, described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity one side, radially beat blind hole from the groove top, get through the hole again along piston wall to the rod chamber direction and form pressure relief groove, isolate mutually between described pressure relief groove and the throttle orifice.
Further, described groove is provided with gradient near rodless cavity one end.
One circle pressure relief groove is distributed in the piston wall, and a circle pressure relief groove contains at least two pressure relief grooves.
Or: at least two circle pressure relief grooves are distributed in the piston wall.
Described piston is provided with the uniform throttle orifice of at least two group radial direction.
The beneficial effects of the utility model mainly show: effectively avoid the high low pressure air-flow to air film exert an influence, control accuracy is higher.
Description of drawings
Fig. 1 unloads the schematic representation that air drain even pressure type gas suspension does not have the friction cylinder.
Fig. 2 is structure of piston figure.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the C-C sectional view of Fig. 2.
Fig. 5 is the air-flow schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to Fig. 1～Fig. 5, a kind of air drain even pressure type gas suspension that unloads does not have the friction cylinder, comprise cylinder barrel 4, piston 6 and piston rod 1, described piston 6 is fixedlyed connected with piston rod 1 one ends, described cylinder barrel 4 one end mounting base 8, the other end of described cylinder barrel 4 is installed end cap 2, described base 8 is provided with gas source air inlet, the inwall of described cylinder barrel 4 is connected with air-bearing 3 outer rings, described piston rod 1 passes inner ring and the end cap 2 of air-bearing 3, the rod chamber of cylinder barrel 4 is provided with the air outlet, described piston 6 radially arranges uniform throttle orifice 11, and described outside piston cylinder is provided with a circle groove near rodless cavity one side, radially beats blind hole from the groove top, get through the hole again along piston wall to the rod chamber direction and form pressure relief groove 10, isolate mutually between described pressure relief groove 10 and the throttle orifice 11.
Further, described groove is provided with gradient near rodless cavity one end.One circle pressure relief groove is distributed in the piston wall, and a circle pressure relief groove contains at least two pressure relief grooves.Or: at least two circle pressure relief grooves are distributed in the piston wall.
Described piston is provided with the uniform throttle orifice of at least two group radial direction.
Described piston 6 one ends are provided with tapped hole 9, and described rod chamber is low-pressure cavity 5, and rodless cavity is hyperbaric chamber 7.
Design has pressure relief groove near an end of hyperbaric chamber at piston, will be discharged to low-pressure cavity through certain crevice throttle damping decompression back in pressure relief groove from the gas stream that hyperbaric chamber enters piston and cylinder barrel gap, does not influence the air film of throttle orifice formation on the piston; Adopt the pneumatic bearing sealing between piston rod and the cylinder sleeve, eliminated the frictional force between piston rod and the cylinder barrel.
There is minimum gap between described piston and cylinder, described base and cylinder barrel are terminal fixing, described cylinder barrel, base form hyperbaric chamber at an end of piston, the air supporting cover of described air-bearing is sleeved on the piston rod, described piston rod and cylinder barrel seal by pneumatic bearing, described end cap is installed in the cylinder barrel end, and described air-bearing, cylinder barrel form low-pressure cavity at the piston the other end.
Cylinder can also form the high low pressure chamber with other forms, and air-bearing play the guiding role to piston rod, also can be installed in the cylinder outside and wait other positions.
Described piston structure arranges the throttle orifice of even cloth as shown in Figure 2 on the piston radial, the quantity of throttle orifice can be arranged one or more groups; The outside piston cylinder has a circle groove near hyperbaric chamber one side design, radially beats blind hole from the groove top, gets through the hole again along piston wall to the low-pressure cavity direction and forms pressure relief groove, and one or more groups pressure relief groove is distributed in the piston wall, and does not communicate between the throttle orifice; In Fig. 2, nearly hyperbaric chamber one end of pressure relief groove groove becomes certain gradient, and therefore, the air-flow that enters piston and cylinder gap from hyperbaric chamber directly flow in the low-pressure cavity from pressure relief groove; Pressure relief groove also can be split into other form, can conveniently derive hyperbaric chamber and press people's air-flow to get final product; Gas in the hyperbaric chamber forms air film through throttle orifice between piston and cylinder gap, air film gas part flows directly into low-pressure cavity along piston and cylinder barrel gap, and remaining flows into low-pressure cavity through pressure relief groove.And do not influence air film between piston and cylinder barrel from the gas that hyperbaric chamber enters the gap, as Fig. 3.
Suction port P2 connects on the suction port of air-bearing and the cylinder barrel, from outside air feed, forms lubricated air film between air-bearing and the piston rod, on the low-pressure cavity cylinder barrel wall air outlet O is arranged.Source of the gas enters hyperbaric chamber from cylinder air inlet P1, promotes the piston frictionless motion.The pressure of P2 suction port is a constant pressure, guarantees the proper functioning of air-bearing; The pressure of P1 suction port is the working pressure of cylinder, is a variable.
Claims (5)
1. one kind is unloaded air drain even pressure type gas suspension and is not had the friction cylinder, comprise cylinder barrel, piston and piston rod, described piston is fixedlyed connected with piston rod one end, described cylinder barrel one end mounting base, the other end of described cylinder barrel is installed end cap, described base is provided with gas source air inlet, the inwall of described cylinder barrel is connected with the air-bearing outer ring, described piston rod passes inner ring and the end cap of air-bearing, the rod chamber of cylinder barrel is provided with the air outlet, it is characterized in that: described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity one side, radially beat blind hole from the groove top, get through the hole again along piston wall to the rod chamber direction and form pressure relief groove, isolate mutually between described pressure relief groove and the throttle orifice.
2. the air drain even pressure type gas suspension that unloads as claimed in claim 1 does not have the friction cylinder, it is characterized in that: described groove is provided with gradient near rodless cavity one end.
3. the air drain even pressure type gas suspension that unloads as claimed in claim 1 or 2 does not have the friction cylinder, it is characterized in that: a circle pressure relief groove is distributed in the piston wall.
4. the air drain even pressure type gas suspension that unloads as claimed in claim 1 or 2 does not have the friction cylinder, it is characterized in that: at least two circle pressure relief grooves are distributed in the piston wall.
5. the air drain even pressure type gas suspension that unloads as claimed in claim 1 or 2 does not have the friction cylinder, it is characterized in that: described piston is provided with the uniform throttle orifice of at least two group radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220750033 CN203176048U (en) | 2012-12-31 | 2012-12-31 | Air discharging groove pressure equalizing type air-suspending friction-free cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220750033 CN203176048U (en) | 2012-12-31 | 2012-12-31 | Air discharging groove pressure equalizing type air-suspending friction-free cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176048U true CN203176048U (en) | 2013-09-04 |
Family
ID=49072751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220750033 Expired - Lifetime CN203176048U (en) | 2012-12-31 | 2012-12-31 | Air discharging groove pressure equalizing type air-suspending friction-free cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016445A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air-suspending frictionless cylinder with pressure equalizing type gas unloading groove |
-
2012
- 2012-12-31 CN CN 201220750033 patent/CN203176048U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016445A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air-suspending frictionless cylinder with pressure equalizing type gas unloading groove |
| CN103016445B (en) * | 2012-12-31 | 2015-02-25 | 浙江工业大学 | Air-suspending frictionless cylinder with pressure equalizing type gas unloading groove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20150225 |
|
| RGAV | Abandon patent right to avoid regrant |