CN201096583Y - Hydraulic trimmer - Google Patents
Hydraulic trimmer Download PDFInfo
- Publication number
- CN201096583Y CN201096583Y CNU2007201739158U CN200720173915U CN201096583Y CN 201096583 Y CN201096583 Y CN 201096583Y CN U2007201739158 U CNU2007201739158 U CN U2007201739158U CN 200720173915 U CN200720173915 U CN 200720173915U CN 201096583 Y CN201096583 Y CN 201096583Y
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- hydraulic
- adjuster bar
- upper plate
- regulating apparatus
- housing
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Abstract
The utility model relates to a hydraulic fine adjustment device which belongs to an auxiliary device of the hydraulic system; a handwheel is connected with the input shaft of a harmonic reducer; the output shaft of the harmonic reducer is connected with the drive gear of a gear pair; a rotary nut is fixed in the middle of a driven gear; an adjusting rod is inserted into the rotary nut; the middle part of the adjusting rod adopts the thread structure; the adjusting rod is in threaded match with the rotary nut; the lower part of the adjusting rod is a polished rod and is inserted into the cavity of the shell; a sealing ring is arranged between the adjusting rod and the shell; the upper part of the adjusting rod is arranged in an upper cover; the shell is fixedly arranged on a lower plate; the harmonic reducer is fixed on an upper plate through an installation base; the gear pair is arranged between the upper plate and the lower plate; the upper plate is fixedly connected with the lower plate through a pillar and a screw rod. The hydraulic fine adjustment device has the advantages that the structure of the hydraulic fine adjustment device is novel, special, simple and practical; the hydraulic fine adjustment device can be arranged between the pipelines of a forcing valve and a hydraulic cylinder to realize the purposes of high accuracy and high reliability of hydraulic loading; the hydraulic fine adjustment device is applicable to an overlap-type force standard machine, a force measuring system, the calibrating device of the force measuring system and the calibrating device of a weighing system.
Description
Technical field
The utility model relates to a kind of hydraulic fine-regulating apparatus, belong to a servicing unit of hydraulic system, but it is different from general Hydraulic Elements, is mainly used in superposing type force standard machine, dynamometric system and its calibrating installation, the calibrating installation of weighing system.The mechanics category that also can belong to metering field.
Background technology
By to the supercharging of hydraulic cylinder medium, make piston produce acting force, be used widely to the hydraulic loaded mode of given object imposed load.Hydraulic loaded is stepless adjustable, and imposed load does not steadily have impact, and load range is wide, and device volume is little, in light weight, for metering dynamometry technology very important Practical significance is arranged.But metering dynamometry technical requirement power value precision height (as 0.03%～0.01% or higher), and require force value stabilization.Though hydraulic loaded can apply any one power value, after adding, load can not keep stable, and the power value will change soon, even keeps the high stability (more than 0.03%) of at several seconds zero point such short time all to be difficult to accomplish.This is a very big obstacle to hydraulic loaded in the technical application of dynamometry, and solving the hydraulic loaded stable problem is its precondition in the technical application of high precision dynamometry.
The unsettled reason of hydraulic loaded is generally all thought what hydraulic system leakage caused.But only take measures and to deal with problems from sealing.Observe by experiment and theoretical analysis, think that the hydraulic loaded instability is not leaked and caused under modern Sealing Technology has reached quite high horizontal situation, but the performance of hydraulic medium own causes that promptly performance parameter variations causes.Specifically: during loading, along with medium pressure raises, its temperature also will raise; Loading stops, and medium temperature is higher than ambient temperature in the valve-off, hydraulic cylinder, its temperature is descended to extraneous heat release.Along with medium temperature reduces, its volume will shrink, and this moment, medium was in a closed system, and system volume is constant.And hydraulic medium will be full of whole volume all the time, and at this moment its volume can not diminish, but produces substantial expansion.Then bring the reduction of self pressure, cause the continuous decline of piston power output.The unloading situation is just in time opposite, and load stops unloading when being discharged to a certain value, and medium temperature is lower than ambient temperature in the cylinder, absorb heat to the external world, and the medium volume expands.Because substantial compression then appears in the constancy of volume.Pressure raises, and the piston power output rises.The unsettled reason of hydraulic loaded that Here it is.It is the decision of the performance of hydraulic medium own, and the way of solution is not to eliminate thermal effect by the character that changes medium, takes indemnifying measure but comply with the hydraulic medium performance characteristics, and compensatory approach has flow-compensated and external compensation etc. at present, but effect is undesirable.Therefore, exploring a kind of new compensatory approach, to solve hydraulic loaded stability be anxious problem to be solved.
Summary of the invention
The purpose of this utility model is to provide a kind of hydraulic fine-regulating apparatus based on the cubage compensation method, solve the hydraulic loaded stability problem and it is used in that the high precision dynamometry is technical, it is to be contained in pressure charging valve (admission valve) to the pipeline between the hydraulic cylinder body, seal chamber of the common composition of the pressure chamber of pipeline, hydraulic fine-regulating apparatus inner chamber and hydraulic cylinder behind the valve, change volume in the chamber with the lifting of the adjuster bar in the hydraulic fine-regulating apparatus, with the variation of compensation medium volume, thereby realize the stable of hydraulic loaded.Because the liquid compression rate is very little, its coefficient of volume compressibility: general hydraulic oil is 5～7 * 10
-10m
2/ N.Very little volume-variation can cause bigger pressure change, therefore, adopts the utility model hydraulic fine-regulating apparatus that volume is made small change, just can obtain satisfied regulating effect.
The purpose of this utility model is realized by following technical scheme, it comprises housing, adjuster bar, O-ring seal, harmonic wave speed reducing machine, gear pair, the rotation nut, last cover, upper plate, lower plate and handwheel, handwheel links to each other with the harmonic wave speed reducing machine input shaft, the harmonic wave speed reducing machine output shaft links to each other with the driving gear of gear pair, driving gear and follower gear engagement, install the rotation nut in the middle of the follower gear, rotation nut interpolation is debug pole, the adjuster bar middle part is a helicitic texture, cooperate with the rotation nut thread, the adjuster bar bottom is a polished rod, inserts in the housing chamber, be provided with O-ring seal between adjuster bar and the housing, be used for sealing; Adjuster bar top is contained in the cover, and last cover is packed on the upper plate, and housing is packed on the lower plate, and harmonic wave speed reducing machine is loaded on the upper plate by mount pad, and gear pair is installed between the upper and lower plate by transverse bearing, and upper and lower plate is affixed by pillar and screw rod.
An import is established in the housing lower end, and an outlet is established in its side, middle part, links to each other with hydraulic cylinder with charge valve respectively during use, and like this, charge valve is to just forming a closed system between hydraulic cylinder.Rotate handwheel during work, rotate by the harmonic wave speed reducing machine driven gear is secondary, the rotation nut drives the adjuster bar lifting along with rotation, thereby changes the housing internal volume, implements volume compensation.
In the last cover feather key is housed, feather key cooperates with the adjuster bar keyway, prevents to occur in the adjuster bar lifting process rotating, and makes it only to do rectilinear motion up and down.
Thrust bearing is equipped with at two ends at the rotation nut, to bear the axial force that adjuster bar produces under pressure medium; Set O-ring seal is these special O-ring seals of twice between adjuster bar and the housing.
Fix with nut between upper and lower plate and the pillar; Fix with nut between upper and lower plate and the screw rod.
Housing is screwed on lower plate; Last cover is fixed by bolts on the upper plate.
Handwheel is connected with key with the harmonic wave speed reducing machine input shaft; The harmonic wave speed reducing machine output shaft is connected with key with driving gear; To rotate nut with key and back-up ring is packed in the middle of the follower gear; Be screwed between last cover and the feather key; Mount pad is screwed on upper plate.
Separate with axle sleeve between thrust bearing and the transverse bearing.
All be lined with spring washer below screw, the bolt.
For adapting to the loading needs of different loads, developed the hydraulic fine-regulating apparatus of different size.Press the diameter difference of adjuster bar, be respectively the micro actuator of 20, 30, 50.The load that applies is big, and diameter of cylinder is big, and required regulated quantity is big, with large diameter.It is little that institute adds load, the usefulness minor diameter.
The operating pressure of micro actuator is 0～26MPa, is used for the loading that maximum load is 100T～3000T.Regulated quantity is add 1% of load, and degree of regulation is add 0.001% of maximum load.Load stability (or longer time) 0.002%F.S. that reaches per 30 seconds.
Design concept:
Because the operating pressure of micro actuator is higher, the adjuster bar diameter is bigger comparatively speaking, and medium pressure produces larger axis to power to bar in the working chamber, and driving torque is big.And the adjuster bar diameter is bigger, and the volume-variation that same rotational angle produces is big.For fine adjustments and easy operating, adopt handwheel by harmonic wave speed reducing machine turning gear wheel set, and then driven the mechanism of adjuster bar lifting, make rapid operation and adjusting function good.
Be the operating performance and the adjusting function that guarantee, the micro actuator technical parameter is chosen by following scope:
Handwheel diameter: 120～ 150, harmonic wave speed reducing machine speed ratio: i=40～250, the gear pair speed ratio: 1～2, adjuster bar thread pitch S=4～8, the adjuster bar sectional area compares with the area of hydraulic cylinder piston area: A=100～500.
By the minimum corner of handwheel is 2 °, and each parameter need satisfy following relational expression:
Gordian technique characteristics of the present utility model are: by the high reduction gear ratio of harmonic wave speed reducing machine, adjuster bar and hydraulic cylinder large tracts of land ratio have been realized meticulous adjusting; Realized accurate transmission by harmonic wave speed reducing machine and gear pair; Produce when adopting low this special envelope that rubs to prevent the adjuster bar motion and creep; Adopt this special envelope and the conical surface that the hard sealing of sphere has been prevented leakage.
The utility model has the advantages that:
1, the novel structure uniqueness is simple and practical.
2, need not change hydraulic cylinder, only need on the pipeline between pressure charging valve and the hydraulic cylinder, to install the utility model hydraulic fine-regulating apparatus additional, just can reach the purpose of cubage compensation.
3, can reach high precision, the high stability of hydraulic loaded, be applicable to superposing type force standard machine, dynamometric system and its calibrating installation, the calibrating installation of weighing system.
Description of drawings
Fig. 1 is the hydraulic fine-regulating apparatus structural representation;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is hydraulic fine-regulating apparatus application principle figure.
Among the figure: 1. housing, 2. adjuster bar, 3. O-ring seal, 4. nut, 5. thrust bearing, 6. axle sleeve, 7. lower plate, 8. transverse bearing, 9. pillar, 10. follower gear, 11. import, 12. outlet, 13. key, 14. back-up ring, 15. rotation nut, 16. upper plate, 17. screw, 18. feather key, 19. last cover, 20. key, 21. handwheel, 22. harmonic wave speed reducing machine, 23. mount pad, 24. key, 25. driving gear, 26. screw, 27. bolt, 28. nut, 29. screw rod, 30. screw, 31. pumping plant, 32. charge valve, 33. unloading valve, 34. hydraulic cylinder, 35. hydraulic fine-regulating apparatus.
Embodiment
Fig. 1, Figure 2 shows that the embodiment of the utility model hydraulic fine-regulating apparatus, handwheel 21 connects harmonic wave speed reducing machine 22 input shafts, the driving gear 25 of harmonic wave speed reducing machine 22 output shaft connection gear pairs, driving gear 25 and follower gear 10 engagements, install rotation nut 15 in the middle of the follower gear 10, rotation nut 15 interpolations are debug pole 2, adjuster bar 2 middle parts are helicitic texture, with rotation nut 15 threaded engagement, adjuster bar 2 bottoms are polished rod, insert in housing 1 chamber, are provided with O-ring seal 3 between adjuster bar 2 and the housing 1, in the present embodiment, O-ring seal 3 is these special O-ring seals of twice; Adjuster bar 2 tops are contained in the cover 19, last cover 19 is packed on the upper plate 16, and housing 1 is packed on the lower plate 7, and harmonic wave speed reducing machine 22 is loaded on the upper plate 16 by mount pad 23, gear pair is installed between upper plate 16 and the lower plate 7 by transverse bearing 8, and upper plate 16 and lower plate 7 are affixed by pillar 9 and screw rod 29.
An import 11 is established in housing 1 lower end, and an outlet 12 is established in its side, middle part, links to each other with hydraulic cylinder 34 with charge valve 32 respectively during use, and like this, charge valve 32 to 34 of hydraulic cylinders just form a closed system.Rotate handwheel 21 during work, rotate by harmonic wave speed reducing machine 22 driven gears are secondary, rotation nut 15 drives adjuster bar 2 liftings along with rotation, thereby changes housing 1 internal volume, implements volume compensation.
In the last cover 19 feather key 18 is housed, feather key 18 cooperates with adjuster bar 2 keyways, prevents to occur in adjuster bar 2 lifting process rotating, and makes it only to do rectilinear motion up and down;
Thrust bearing 5 is equipped with at two ends at rotation nut 15, to bear the axial force that adjuster bar 2 produces under pressure medium; Adopt this special O-ring seal sealing of twice between adjuster bar 2 and the housing 1, sealing adopts twice guaranteeing the reliability of sealing, and seal is with this special O-ring seal of U.S. SHAMBAN company, and sealing part dependable performance and rub for a short time can effectively prevent to creep.
Fixing between upper plate 16, lower plate 7 and the pillar 9 with nut 4; Fixing between upper plate 16, lower plate 7 and the screw rod 29 with nut 28.
Housing 1 usefulness screw 30 is fixed on the lower plate 7; Last cover 19 usefulness bolts 27 are fixed on the upper plate 16.
Separate with axle sleeve 6 between thrust bearing 5 and the transverse bearing 8.
All be lined with spring washer below screw, the bolt.
Use principle: as shown in Figure 3, hydraulic fine-regulating apparatus is installed in charge valve 32 to the pipeline between the hydraulic cylinder 34 when using, and its import is connected with charge valve 32 (admission valve), exports to be connected with the pressure chamber of hydraulic cylinder 34, export last be for the emptying intracavity gas.The import and export joint employing conical surface is tightly connected firmly to sphere, can guarantee not take place to leak.The utility model hydraulic fine-regulating apparatus is a manual components, is loaded to hydraulic cylinder 34 superchargings by charge valve 32 when specifically using, and is added to 99% when above of predetermined value, closes charge valve 32, accurately is added to required power value with hydraulic fine-regulating apparatus again.After, variation is regulated according to the power value, and it is stable that the value of exerting all one's strength keeps, and regulate by the rotation manual wheel and solve, rotation direction, angular dimension, the speed speed is all determined according to power value variation tendency by the people.
Claims (7)
1, a kind of hydraulic fine-regulating apparatus, it is characterized in that: it comprises housing (1), adjuster bar (2), O-ring seal (3), harmonic wave speed reducing machine (22), gear pair, rotation nut (15), last cover (19), upper plate (16), lower plate (7) and handwheel (21), handwheel (21) links to each other with harmonic wave speed reducing machine (22) input shaft, harmonic wave speed reducing machine (22) output shaft links to each other with the driving gear (25) of gear pair, driving gear (25) and follower gear (10) engagement, install rotation nut (15) in the middle of the follower gear (10), rotation nut (15) interpolation is debug pole (2), adjuster bar (2) middle part is a helicitic texture, with rotation nut (15) threaded engagement, adjuster bar (2) bottom is a polished rod, insert in housing (1) chamber, be provided with O-ring seal (3) between adjuster bar (2) and the housing (1), adjuster bar (2) top is contained in the cover (19), last cover (19) is packed on the upper plate (16), housing (1) is packed on the lower plate (7), harmonic wave speed reducing machine (22) is loaded on the upper plate (16) by mount pad (23), gear pair is installed between upper plate (16) and the lower plate (7) by transverse bearing (8), upper plate (16), affixed between the lower plate (7) by pillar (9) and screw rod (29).
2, hydraulic fine-regulating apparatus as claimed in claim 1, it is characterized in that: the handwheel diameter is 120～ 150, the harmonic wave speed reducing machine speed ratio is i=40～250, the gear pair speed ratio is 1～2, adjuster bar thread pitch S=4～8, the adjuster bar sectional area is A=100～500 with the area ratio of hydraulic cylinder piston area;
Each parameter need satisfy following relational expression:
3, hydraulic fine-regulating apparatus as claimed in claim 1 is characterized in that: an import (11) is established in housing (1) lower end, and an outlet (12) is established in its side, middle part.
4, hydraulic fine-regulating apparatus as claimed in claim 1 is characterized in that: go up in the cover (19) feather key (18) is housed, feather key (18) cooperates with adjuster bar (2) keyway.
5, hydraulic fine-regulating apparatus as claimed in claim 1 is characterized in that: thrust bearing (5) is equipped with at the two ends at rotation nut (15).
6, hydraulic fine-regulating apparatus as claimed in claim 1 is characterized in that: set O-ring seal (3) is this special O-ring seal of twice between adjuster bar (2) and the housing (1).
7, hydraulic fine-regulating apparatus as claimed in claim 1 is characterized in that: will rotate nut (15) with key (13) and back-up ring (14) and be packed in follower gear (10) centre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201739158U CN201096583Y (en) | 2007-10-31 | 2007-10-31 | Hydraulic trimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201739158U CN201096583Y (en) | 2007-10-31 | 2007-10-31 | Hydraulic trimmer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096583Y true CN201096583Y (en) | 2008-08-06 |
Family
ID=39923636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201739158U Expired - Fee Related CN201096583Y (en) | 2007-10-31 | 2007-10-31 | Hydraulic trimmer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201096583Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113205998A (en) * | 2021-05-06 | 2021-08-03 | 南京同歌网络科技有限公司 | Capillary tube fine adjustment device for mass spectrometer |
-
2007
- 2007-10-31 CN CNU2007201739158U patent/CN201096583Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113205998A (en) * | 2021-05-06 | 2021-08-03 | 南京同歌网络科技有限公司 | Capillary tube fine adjustment device for mass spectrometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20091130 |