CN203548437U - High-precision constant-power output air floating device - Google Patents
High-precision constant-power output air floating device Download PDFInfo
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- CN203548437U CN203548437U CN201320657498.XU CN201320657498U CN203548437U CN 203548437 U CN203548437 U CN 203548437U CN 201320657498 U CN201320657498 U CN 201320657498U CN 203548437 U CN203548437 U CN 203548437U
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Abstract
The utility model provides a high-precision constant-power output air floating device, which comprises an output cylinder, a compensation cylinder, a laser displacement sensor and a linear motor; the output cylinder comprises a cylinder barrel, a first piston, an output shaft, an air storage sleeve and an air pressure pressing plate, and the compensation cylinder comprises a compensation barrel, a second piston and a piston rod; the first piston is sheathed in the cylinder barrel, the first piston is connected with the output shaft, the air storage sleeve is sheathed outside the cylinder barrel, an air storage chamber is formed between the air storage sleeve and the cylinder barrel, one end of the compensation barrel is fixedly connected with the air storage sleeve, the inner chamber of the compensation barrel is communicated with the air storage chamber, the second piston is sheathed in the compensation barrel, the second piston is connected with the piston rod, the piston rod penetrates through an end cover and an air bearing and is connected with the linear motor and the laser displacement sensor is fixedly arranged on the cylinder barrel. The high-precision constant-power output air floating device has the advantages that since the compensation cylinder and the air storage sleeve are added, the volume of the air inlet chamber of the cylinder barrel is increased, high-precision and high-speed constant-power output can be realized through volume compensation and air pressure control, the structure is simple, the precision is high and the stability is good.
Description
Technical field
The utility model relates to constant force output unit.
Background technique
According to its different applied environments and application requirements, constant force output has various structures and implementation method.Dynamically constant force output refers to a constant power value is carried in the target workpiece of dynamic motion.
By counterweight and target workpiece hanging, it is the simplest and conventional method that applies constant force, because counterbalance mass is constant, so the force retaining acting in target workpiece is constant, but when target workpiece is done acceleration or deceleration motion, counterweight can produce because of the impact of self inertia power the additional power in the target workpiece of an effect, and the larger impact of counterbalance mass is larger, therefore this method is only applicable to the occasion of target workpiece low speed or uniform motion.Torque motor, hydraulic cylinder etc. are also often applied to constant force output field.As " hydraulic pressure installation of constant force output " that number of patent application is 201120495617.7 just announced a kind of hydraulic pressure installation of exporting accurate power value by PLC controller, electromagnetic proportional valve, pressure transducer, but in this device, pressure transducer is arranged on the output terminal of hydraulic pressure installation, pressure transducer is kept in motion, and therefore can affect the validity of measured value.Air supporting is used widely in realizing ultraprecise constant force output control, minute-pressure action control without friction cylinder.Between piston and cylinder barrel, by gas lubrication, there is not frictional force, therefore the power acting on piston is relevant with the air pressure size in cylinder barrel with the cross-section area of piston, the speed of response of gas is slow, the Volume Changes that the motion of cylinder barrel inner carrier produces can cause air pressure transition, cause the fluctuation of output constant force, therefore, air supporting is generally used for realizing action output without friction cylinder, constant voltage control ratio is more difficult, is difficult to guarantee the constant of ouput force value.
Summary of the invention
For ouput force value in existing constant force output unit be difficult to keep constant, sensor measurement not precisely, the problem such as constant force output accuracy is not high, the utility model provide a kind of ouput force value accurately, a kind of high-precision constant force output air-floating apparatus of good stability.
The utility model solves the technological scheme that its technical problem adopts:
A high-precision constant force output air-floating apparatus, comprises output cylinder, compensation cylinder; Described output cylinder comprises cylinder barrel, first piston, output shaft, gas storage jacket, air pressure pressing plate, and described compensation cylinder comprises compensating cylinder, the second piston, piston rod; Described a kind of high-precision constant force output air-floating apparatus also comprises laser displacement sensor, linear electric motor.
Described first piston be sleeved in cylinder barrel and and inner wall of cylinder between there is minimum gap, described first piston connects output shaft, described gas storage jacket be sleeved on cylinder barrel outer and and cylinder barrel between form air storing cavity, described compensating cylinder one end is fixed with gas storage jacket and inner chamber and air storing cavity communicate, the described compensating cylinder the other end is installed end cap, described the second piston sleeve is contained in compensating cylinder, described the second piston connects piston rod, the outer fixed air bearing of described end cap, described piston rod is connected with linear electric motor with pneumatic bearing through end cap.
Described cylinder barrel comprises one section of cylinder barrel sealed end, described output shaft through cylinder barrel sealed end and and cylinder barrel sealed end inwall between form minimum gap, the described cylinder barrel the other end is installed bottom.
Described air pressure pressing plate be sleeved in cylinder barrel and and inner wall of cylinder between there is minimum gap, installing force sensor under described air pressure pressing plate, described power sensor is fixed on bottom, on described bottom, has air outlet.
Described laser displacement sensor is fixed on cylinder barrel, on described output shaft, is set with reflector, and described laser displacement sensor is relative with reflector position.
On described first piston, the center, one end of no-output axle has inlet hole, first throttle orifice radially that is uniformly distributed along the circumference on described first piston, described first radially throttle orifice communicate with inlet hole, described first radially installs orifice plug in throttle orifice; Described first radially throttle orifice in axial direction have two groups at least.
On described first piston, have the first pressure relief groove; Described the first gas pressure relief slot comprises on outside piston cylinder radial blind holes uniform in groove along the circumferential direction, groove and the axial blind hole communicating with radial blind holes; Described axial blind hole leads to the inner chamber between output shaft and cylinder barrel, described groove be positioned at first radially throttle orifice side and near the one end of no-output axle on piston; Radially isolation mutually between throttle orifice, inlet hole of described the first pressure relief groove and first.
Described cylinder barrel sealed end is the uniform second throttle orifice radially along the circumferential direction, described second radially throttle orifice have vertically two groups at least, described second radially installs orifice plug in throttle orifice; Described cylinder barrel sealed end is set with air supporting seat outward, between described cylinder barrel sealed end and air supporting seat, is provided with Seal cage, described Seal cage with second radially throttle orifice communicate; Described air supporting seat is provided with air supporting suction port.
The 3rd throttle orifice radially that is uniformly distributed along the circumference on described air pressure pressing plate, the described the 3rd radially throttle orifice communicate with inner cavity of cylinder, the described the 3rd radially installs orifice plug in throttle orifice.
Described cylinder barrel is near the uniform inlet hole in one end of air pressure pressing plate, and described inlet hole is communicated with inner cavity of cylinder and air storing cavity.Described cylinder barrel is provided with air outlet hole near sealed end, and described air outlet hole communicates with ambient atmosphere.
On described gas storage jacket, have gas storage suction port, described gas storage suction port connects Proportional valve by tracheae.
Between described gas storage jacket and cylinder barrel, between cylinder barrel and air supporting seat, all adopt the sealing of O type circle.
Mentality of designing of the present utility model and advantage show:
Because piston cross-section area is certain, thus constant as long as assurance enters into the gas pressure of inner cavity of cylinder, can guarantee that the power value of output is constant.But piston moves and causes that cavity volume changes, and gas compensation exists certain hysteresis quality, thereby causes air pressure transition, causes Output force wave.Therefore, the utility model has increased compensation cylinder and gas storage jacket, between gas storage jacket and cylinder barrel, form air storing cavity, air storing cavity communicates with inner cavity of cylinder, has been equivalent to increase the volume of cylinder barrel air-inlet cavity, compensating cylinder and air storing cavity communicate, therefore, by laser displacement sensor, can measure the displacement of first piston in output cylinder, then by the second piston in linear electric motor control and compensation cylinder, move corresponding displacement, guarantee that air storing cavity internal volume remains unchanged, avoided output shaft motion and the pressure surge that causes; By the gentle pressure-controlled of volume compensation, can realize accurate, the output of constant force at a high speed.
Gas storage jacket connects Proportional valve and gas holder by tracheae, and passing ratio valve can be controlled the pressure size in air storing cavity; Installing force sensor and air pressure pressing plate on cylinder barrel base, air pressure pressing plate is provided with the 3rd throttle orifice radially, by piston intake chamber self gas air feed, between air pressure pressing plate and cylinder barrel, form gas lubrication, there is not frictional force, because act on the power of piston bottom end, equate with the power acting on air pressure pressing plate, so can measure the power value size of piston output by power sensor, passing ratio valve is adjusted the size of air storing cavity internal air pressure, accurately the power value of control output and easy to operate.
Piston is provided with the first throttle orifice radially, and the pressurized gas in cylinder barrel air-inlet cavity enter the first throttle orifice radially by the inlet hole on piston, in the gap of cylinder barrel and piston, form air film; Cylinder barrel sealed end is provided with the second throttle orifice radially, by the air supporting suction port on air supporting seat, carries out independent gas supply, for output shaft provides lubricated and supports; Structure and plenum system are simple, bearing capacity good.
Radially near throttle orifice, be equipped with pressure relief groove, pressure relief groove communicates with extraneous normal pressure, prevents that cylinder barrel inner high voltage gas from entering air supporting gap air film is exerted an influence on the one hand, plays seal action, forms on the other hand atmospheric area in gap, promotes the formation of air film.
Advantage of the present utility model shows: simple in structure, precision is high, good stability.
Accompanying drawing explanation
Fig. 1 is a kind of high-precision constant force output air-floating apparatus schematic diagram
Embodiment
In conjunction with Fig. 1, a kind of high-precision constant force output air-floating apparatus, comprises output cylinder, compensation cylinder; Output cylinder comprises cylinder barrel 6, first piston 19, output shaft 1, gas storage jacket 8, air pressure pressing plate 18, and compensation cylinder comprises compensating cylinder 23, the second piston 22, piston rod 24; Described a kind of high-precision constant force output air-floating apparatus also comprises linear electric motor 27, laser displacement sensor 28.
First piston 19 be sleeved in cylinder barrel 6 and and inner wall of cylinder between there is minimum gap, first piston 19 connects output shaft 1, gas storage jacket 8 be sleeved on cylinder barrel 6 outer and and cylinder barrel between form air storing cavity 9, fixing and the inner chamber of compensating cylinder 23 one end and gas storage jacket 8 and air storing cavity 9 communicate, compensating cylinder 23 the other ends are installed end cap 25, the second piston 22 is sleeved in compensating cylinder 23, the second piston 22 connects piston rod 24, the outer fixed air bearing 26 of end cap 25, piston rod 24 is connected with linear electric motor 27 with pneumatic bearing 26 through end cap 25.
Cylinder barrel 6 comprises one section of cylinder barrel sealed end, output shaft 1 through cylinder barrel sealed end and and cylinder barrel sealed end inwall between form minimum gap, cylinder barrel 6 the other ends are installed bottoms 15.
Air pressure pressing plate 18 be sleeved in cylinder barrel 6 and and inner wall of cylinder between there is minimum gap, 18 times installing force sensors 17 of air pressure pressing plate, power sensor 17 is fixed on bottom 15, has air outlet 16 on bottom.
Laser displacement sensor 28 is fixed on cylinder barrel 6, is set with reflector 29 on output shaft 1, and laser displacement sensor 28 is relative with reflector 29 positions.
On first piston 19, the center, one end of no-output axle has inlet hole, on first piston, be uniformly distributed along the circumference first radially throttle orifice 20, the first radially throttle orifice 20 communicate with inlet hole, the first interior installation orifice plug of throttle orifice 20 radially; First radially throttle orifice 20 in axial direction have two groups.
On first piston, have the first pressure relief groove, the first gas pressure relief slot comprises on piston 19 external cylindrical surfaces radial blind holes uniform in groove 21 along the circumferential direction, groove and the axial blind hole communicating with radial blind holes; Axial blind hole leads to the inner chamber of 5 of output shaft 1 and cylinder barrels, groove 21 be positioned at first radially throttle orifice 20 side and near the one end of no-output axle on piston 19; Radially isolation mutually between throttle orifice 20, inlet hole of the first pressure relief groove and first.
Cylinder barrel sealed end along the circumferential direction uniform second radially throttle orifice 4, the second radially throttle orifice 4 have vertically three groups, the second interior installation orifice plug of throttle orifice 4 radially; Cylinder barrel sealed end is set with air supporting seat 2 outward, and 2 of cylinder barrel sealed end and air supporting seats are provided with Seal cage, Seal cage with second radially throttle orifice 4 communicate; Air supporting seat 2 is provided with air supporting suction port 3.
On air pressure pressing plate 18, be uniformly distributed along the circumference the 3rd radially throttle orifice 14, the three radially throttle orifice 14 communicate with inner cavity of cylinder, the 3rd interior installation orifice plug of throttle orifice 14 radially.
Cylinder barrel 6 is near the uniform inlet hole 13 in one end of air pressure pressing plate 18, and inlet hole 13 is communicated with inner cavity of cylinder and air storing cavity 9.Cylinder barrel 6 is provided with air outlet hole 7 near cylinder barrel sealed end, and air outlet hole 7 communicates with ambient atmosphere.
On gas storage jacket 8, have gas storage suction port 10, gas storage suction port 10 connects Proportional valve 12 by tracheae 11.
6 of gas storage jacket 8 and cylinder barrels, cylinder barrel 6 and 2 of air supporting seats all adopt 5 sealings of O type circle.
Claims (1)
1. a high-precision constant force output air-floating apparatus, is characterized in that: comprise output cylinder, compensation cylinder; Described output cylinder comprises cylinder barrel, first piston, output shaft, gas storage jacket, air pressure pressing plate, and described compensation cylinder comprises compensating cylinder, the second piston, piston rod; Described a kind of high-precision constant force output air-floating apparatus also comprises laser displacement sensor, linear electric motor;
Described first piston be sleeved in cylinder barrel and and inner wall of cylinder between there is minimum gap, described first piston connects output shaft, described gas storage jacket be sleeved on cylinder barrel outer and and cylinder barrel between form air storing cavity, described compensating cylinder one end is fixed with gas storage jacket and inner chamber and air storing cavity communicate, the described compensating cylinder the other end is installed end cap, described the second piston sleeve is contained in compensating cylinder, described the second piston connects piston rod, the outer fixed air bearing of described end cap, described piston rod is connected with linear electric motor with pneumatic bearing through end cap;
Described cylinder barrel comprises one section of cylinder barrel sealed end, described output shaft through cylinder barrel sealed end and and cylinder barrel sealed end inwall between form minimum gap, the described cylinder barrel the other end is installed bottom;
Described air pressure pressing plate be sleeved in cylinder barrel and and inner wall of cylinder between there is minimum gap, installing force sensor under described air pressure pressing plate, described power sensor is fixed on bottom, on described bottom, has air outlet;
Described laser displacement sensor is fixed on cylinder barrel, on described output shaft, is set with reflector, and described laser displacement sensor is relative with reflector position;
On described first piston, the center, one end of no-output axle has inlet hole, first throttle orifice radially that is uniformly distributed along the circumference on described first piston, described first radially throttle orifice communicate with inlet hole, described first radially installs orifice plug in throttle orifice; Described first radially throttle orifice in axial direction have two groups at least;
On described first piston, have the first pressure relief groove; Described the first gas pressure relief slot comprises on outside piston cylinder radial blind holes uniform in groove along the circumferential direction, groove and the axial blind hole communicating with radial blind holes; Described axial blind hole leads to the inner chamber between output shaft and cylinder barrel, described groove be positioned at first radially throttle orifice side and near the one end of no-output axle on piston; Radially isolation mutually between throttle orifice, inlet hole of described the first pressure relief groove and first;
Described cylinder barrel sealed end is the uniform second throttle orifice radially along the circumferential direction, described second radially throttle orifice have vertically two groups at least, described second radially installs orifice plug in throttle orifice; Described cylinder barrel sealed end is set with air supporting seat outward, between described cylinder barrel sealed end and air supporting seat, is provided with Seal cage, described Seal cage with second radially throttle orifice communicate; Described air supporting seat is provided with air supporting suction port;
The 3rd throttle orifice radially that is uniformly distributed along the circumference on described air pressure pressing plate, the described the 3rd radially throttle orifice communicate with inner cavity of cylinder, the described the 3rd radially installs orifice plug in throttle orifice;
Described cylinder barrel is near the uniform inlet hole in one end of air pressure pressing plate, and described inlet hole is communicated with inner cavity of cylinder and air storing cavity; Described cylinder barrel is provided with air outlet hole near sealed end, and described air outlet hole communicates with ambient atmosphere;
On described gas storage jacket, have gas storage suction port, described gas storage suction port connects Proportional valve by tracheae.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320657498.XU CN203548437U (en) | 2013-10-23 | 2013-10-23 | High-precision constant-power output air floating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320657498.XU CN203548437U (en) | 2013-10-23 | 2013-10-23 | High-precision constant-power output air floating device |
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| CN203548437U true CN203548437U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320657498.XU Expired - Lifetime CN203548437U (en) | 2013-10-23 | 2013-10-23 | High-precision constant-power output air floating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527570A (en) * | 2013-10-23 | 2014-01-22 | 浙江工商大学 | High-precision constant force-output air floatation device |
| CN109751966A (en) * | 2019-01-29 | 2019-05-14 | 广东联城住工装备信息科技有限公司 | The detection method of hydraulic clamping system, equipment of vibrating and hydraulic clamping system |
-
2013
- 2013-10-23 CN CN201320657498.XU patent/CN203548437U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527570A (en) * | 2013-10-23 | 2014-01-22 | 浙江工商大学 | High-precision constant force-output air floatation device |
| CN109751966A (en) * | 2019-01-29 | 2019-05-14 | 广东联城住工装备信息科技有限公司 | The detection method of hydraulic clamping system, equipment of vibrating and hydraulic clamping system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |