CN103939275B - Moment of torsion self-check type hydraulic motor with inner curved piston - Google Patents
Moment of torsion self-check type hydraulic motor with inner curved piston Download PDFInfo
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- CN103939275B CN103939275B CN201410178048.1A CN201410178048A CN103939275B CN 103939275 B CN103939275 B CN 103939275B CN 201410178048 A CN201410178048 A CN 201410178048A CN 103939275 B CN103939275 B CN 103939275B
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Abstract
A kind of moment of torsion self-check type hydraulic motor with inner curved piston, comprise the major parts such as pintle, rotor, plunger, housing, cam ring, roller group, output shaft, cam ring supports in the housing by steel ball, the two can relatively rotate, fix a block in the outside of cam ring, open a groove at the corresponding position of housing, make block extend in groove, piezoceramic transducer is separately installed with, by the moment of torsion of the Force Calculation output shaft of piezoceramic transducer above and below block.Hydraulic motor with inner curved piston and torque sensor unite two into one by the present invention, eliminate special torque sensor, simplify power transmission system, and Principle of Torque Measurement is simple and reliable, substantially increase the accuracy that output shaft dynamic torque is measured, can be widely used in the transmission systems such as mining machinery, engineering machinery and handling machinery.
Description
Technical field
The present invention relates to a kind of oil hydraulic motor, specifically a kind of moment of torsion self-check type hydraulic motor with inner curved piston, belongs to hydraulic transmission field.
Background technique
As everyone knows, Innercurve multiple-action radial plunger type hydraulic motor (abbreviation hydraulic motor with inner curved piston) is a kind of low speed high torque hydraulic motor, it is primarily of compositions such as stator, rotor, plunger, roller group, pintle, output shaft and end caps, its stator inner wall is made up of the identical curved surface of multistage shape, stator is both as the housing of motor, again as the guide surface of roller, for back-up roller wheels, complete moment of torsion transmission.Hydraulic motor with inner curved piston has a series of features such as size is little, lightweight, driving torque is large, slewing range is large, cranking performance rating high, low speed good stability, is mechanically widely used at mining machinery, engineering machinery, handling machinery, engineering ship.In order to detect the output torque of hydraulic motor with inner curved piston, and then monitor and forecast being carried out to the running state of transmission system, usually needing mounting torque sensor (or torque and speed sensors) between hydraulic motor with inner curved piston and load.
Moment of torsion is the important parameter of transmission system, and torque measurement is the technological difficulties of art drive systems parameter testing, and the moment of torsion of hydraulic motor output shaft adopts torque sensor to measure usually.The kind of torque sensor is a lot, two large classes can be summarized as according to its working principle, the first kind is based on shearing stress, utilize foil gauge to measure the shearing stress of axle to calculate the moment of torsion of output shaft, its shortcoming is that its measuring accuracy and paster technique are closely related, and precision is lower, in addition, also need the device such as collecting ring, brush to be exported by signal, and collecting ring, brush easily wear and tear, and cause signal measurement accuracy not high.Equations of The Second Kind, based on torsional deflection, utilizes torsional axis both ends of the surface outer corner difference, and calculated the moment of torsion of output shaft by the torsional deflection of measuring axle, conventional has Relative Displacement Method, photoelectric method and magnetoresistance method etc., but needs transmission shaft to disconnect, and uses inconvenience.
According to existing torque measurement techniques, no matter based on shearing stress, or based on torsional deflection, because temperature correction and initial phase compensation problem are comparatively difficult to resolve certainly, therefore, carry out output shaft dynamic torque when measuring, its degree of accuracy is all lower.
Summary of the invention
The object of the invention is, by the improvement to traditional hydraulic motor with inner curved piston, it is made both to have possessed the function of transmission of power, possesses again the function that moment of torsion detects, thus special torque sensor can be cancelled, simplify power transmission system, the online moment of torsion realizing hydraulic motor with inner curved piston detects in real time, and improves the degree of accuracy of output shaft dynamic torque measurement.
The technical solution adopted for the present invention to solve the technical problems is: the stator design of original hydraulic motor with inner curved piston becomes to be made up of cam ring and housing two-part by (1), cam ring and housing can be relatively rotated, and the method for supporting that cam ring adopts is, a raceway is designed at the outer side surface circumferencial direction of cam ring, position corresponding with the raceway of cam ring on housing is uniformly distributed at least 3 radial screw bore, preferably, adopt 5 radial screw bore, a steel ball and a screw plug is had in each radial screw bore, there is a ball-and-socket the inner of screw plug, steel ball screw plug is fixed between the raceway of cam ring and the ball-and-socket of screw plug, so that supporting cam wheel ring, in order to improve the stability of steel ball, the degree of depth of ball-and-socket should be greater than the radius of steel ball, (2) design a block in the outside of cam ring, open a groove in the relevant position of housing, make the block of cam ring extend in the groove of housing, (3) between block and housing, installing piezoceramic transducer, for measuring the peripheral force of cam ring, knowing according to Newton's third law, the peripheral force of cam ring reflects the moment of torsion of output shaft, (4) in housing groove, exterior notch is respectively equipped with oil baffle and cover plate, with the sensitivity preventing fluid and dust from affecting piezoceramic transducer, and then the precision that impact is measured.
The invention has the beneficial effects as follows: hydraulic motor with inner curved piston and torque sensor unite two into one by (1), eliminate special torque sensor, simplify power transmission system; (2) measurement of moment of torsion is converted into measurement of force, simultaneously, because piezoceramic transducer is very applicable to dynamic force measurement, therefore, the present invention substantially increases the accuracy that output shaft dynamic torque is measured, and the online moment of torsion achieving hydraulic motor with inner curved piston detects in real time, and Principle of Torque Measurement is simple and reliable, affected by environment little, safeguard simple and convenient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural drawing of screw plug 12 in Fig. 2.
1. pintles in figure, 2. rotor, 3. plunger, 4. end cap, 5. housing, 6. cam ring, 7. roller group, 8. scaffold, 9. output shaft, 10. bearing, 11. bearing caps, 12. screw plugs, 13. steel balls, 14. oil baffles, 15. blocks, 16. first piezoceramic transducers, 17. first charge amplifiers, 18. first signal processors, 19. cover plates, 20. second piezoceramic transducers, 21. second charge amplifiers, 22. secondary signal processors, 51. grooves, 61. negative cambers, 62. raceways, 121. ball-and-socket, 151. root, 161. first signal cables, 201. secondary signal cables.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Should be clear and definite, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1 and Figure 2, moment of torsion self-check type hydraulic motor with inner curved piston of the present invention, comprise pintle 1, end cap 4, housing 5, scaffold 8, in described housing 5, cam ring 6 is installed, cam ring 6 and housing 5 can relatively rotate, in described cam ring 6, rotor 2 is installed, 8 radial holes are uniformly distributed in rotor 2, a plunger 3 is had in each radial hole, there is roller group 7 termination of plunger 3, the negative camber 61 of the inwall of cam ring 6 to be cross section be inner curve, roller group 7 contacts with the negative camber 61 of cam ring 6 and rolls along negative camber 61.Be provided with output shaft 9 in scaffold 8, output shaft 9 is supported in scaffold 8 by bearing 10, and the outside of bearing 10 is provided with bearing cap 11, and output shaft 9 and rotor 2 are bolted.The outer side surface circumferencial direction of described cam ring 6 has a raceway 62, the position that the circumferencial direction of housing 5 is corresponding with the raceway 62 of cam ring 6 is evenly distributed with 5 radial screw bore, a steel ball 13 and a screw plug 12 is had in each radial screw bore, there is a ball-and-socket 121 (see Fig. 3) the inner of screw plug 12, steel ball 13 screw plug 12 is fixed between the raceway 62 of cam ring 6 and the ball-and-socket 121 of screw plug 12, so that supporting cam wheel ring 6, in order to improve the stability of steel ball 13, the degree of depth of the ball-and-socket 121 of screw plug 12 should be greater than the radius of steel ball 13.
As shown in Figure 2, the outer side surface of cam ring 6 fixes a block 15, the center of block 15 and cam ring 6 be centrally located in same level, a groove 51 is opened in position corresponding with described block 15 on housing 5, block 15 extend in groove 51, first piezoceramic transducer 16 is installed above block 15, first piezoceramic transducer 16 connects the first charge amplifier 17 and the first signal processor 18 successively by the first signal cable 161, second piezoceramic transducer 20 is installed in the below of block 15, second piezoceramic transducer 20 connects the second charge amplifier 21 and secondary signal processor 22 successively by secondary signal cable 201.
Again as shown in Figure 2, be splashed on the first piezoceramic transducer 16 and the second piezoceramic transducer 20 to prevent fluid, affect measuring accuracy, in gap between the root 151 of block 15 and the inwall of housing 5, oil baffle 14 is installed, the area of oil baffle 14 is greater than the area of groove port, is covered completely by groove 51.For strengthening dust-proof effect, the notch outside groove 51 being also provided with area and being greater than outside notch, the cover plate 19 covered completely by outside notch.
Working principle of the present invention is: when high-voltage oil liquid enters the bottom of plunger 3 through pintle 1, promote plunger 3 and roller group 7 is overhanging is pressed onto on the negative camber 61 of cam ring 6, the positive pressure of roller group 7 pairs of cam rings 6 is N, this power N can be analyzed to along the component N1 of plunger 3 axis and the component N2 perpendicular to plunger 3 axis, according to Newton's third law, cam ring 6 pair roller group 7 has reaction force-N1 and-N2 (not shown), reaction force-N2 rotates (see Fig. 2) by roller group 7 drive rotor 2 clockwise direction, and be with dynamic load to rotate by output shaft 9.Meanwhile, N2 will make cam ring 6 counterclockwise rotate, but, because the rotation of housing 5 by the first piezoceramic transducer 16 and block 15 pairs of cam rings 6 limits, therefore, cam ring 6 can not rotate, but acts on the first piezoceramic transducer 16 above block 15 with certain power F.The size of measuring force F, can calculate the moment of torsion suffered by cam ring 6, and then determines the moment of torsion of output shaft 9.When oil-feed and oil return reverse time, rotor 2 reverses, and now, the moment of torsion of cam ring 6 is measured by the second piezoceramic transducer 20 below block 15, and principle is the same, repeats no more.
Should be clear and definite, above-described embodiment is to explanation of the present invention, instead of limitation of the invention, and any simple conversion scheme all belongs to protection scope of the present invention.
Claims (4)
1. a moment of torsion self-check type hydraulic motor with inner curved piston, comprise pintle (1), end cap (4), housing (5), scaffold (8), cam ring (6) is installed in described housing (5), rotor (2) is installed in described cam ring (6), 8 radial holes are uniformly distributed in described rotor (2), a plunger (3) is had in each radial hole, there is roller group (7) termination of described plunger (3), the negative camber (61) of the inwall of described cam ring (6) to be cross section be concavo-convex curve, described roller group (7) contacts with the negative camber (61) of described cam ring (6) and rolls along negative camber (61), output shaft (9) is installed in described scaffold (8), described output shaft (9) and described rotor (2) are bolted, it is characterized in that: the outer side surface circumferencial direction of described cam ring (6) has raceway (62), the position that the circumferencial direction of described housing (5) is corresponding with the raceway (62) of described cam ring (6) is evenly distributed with 5 radial screw bore, a steel ball (13) and a screw plug (12) is had in each radial screw bore, there is a ball-and-socket (121) the inner of described screw plug (12), described steel ball (13) screw plug (12) is fixed between the raceway (62) of described cam ring (6) and the ball-and-socket (121) of screw plug (12),
The outer side surface of described cam ring (6) fixes a block (15), the center of described block (15) and described cam ring (6) be centrally located in same level, a groove (51) is opened in the upper position corresponding with described block (15) of described housing (5), described block (15) extend in described groove (51), in the top of described block (15), the first piezoceramic transducer (16) is installed, described first piezoceramic transducer (16) connects the first charge amplifier (17) and the first signal processor (18) successively by the first signal cable (161), in the below of described block (15), the second piezoceramic transducer (20) is installed, described second piezoceramic transducer (20) connects the second charge amplifier (21) and secondary signal processor (22) successively by secondary signal cable (201).
2. moment of torsion self-check type hydraulic motor with inner curved piston according to claim 1, is characterized in that: the degree of depth of the ball-and-socket (121) of described screw plug (12) should be greater than the radius of steel ball (13).
3. moment of torsion self-check type hydraulic motor with inner curved piston according to claim 1, it is characterized in that: be provided with oil baffle (14) in the gap between the root (151) of described block (15) and the inwall of described housing (5), described oil baffle (14) can cover described groove (51) completely.
4. moment of torsion self-check type hydraulic motor with inner curved piston according to claim 1, is characterized in that: the notch in described groove (51) outside is provided with the cover plate (19) covering described notch completely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410178048.1A CN103939275B (en) | 2014-04-29 | 2014-04-29 | Moment of torsion self-check type hydraulic motor with inner curved piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410178048.1A CN103939275B (en) | 2014-04-29 | 2014-04-29 | Moment of torsion self-check type hydraulic motor with inner curved piston |
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| Publication Number | Publication Date |
|---|---|
| CN103939275A CN103939275A (en) | 2014-07-23 |
| CN103939275B true CN103939275B (en) | 2016-01-06 |
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| CN201410178048.1A Expired - Fee Related CN103939275B (en) | 2014-04-29 | 2014-04-29 | Moment of torsion self-check type hydraulic motor with inner curved piston |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194571B (en) * | 2016-09-14 | 2018-01-09 | 杨健 | A kind of rotary casing type hydraulic motor |
| CN108254119B (en) * | 2016-12-29 | 2020-12-25 | 财团法人工业技术研究院 | Interaction force detection device |
| CN106869844B (en) * | 2017-03-21 | 2023-05-30 | 中国石油天然气集团有限公司 | Bridge plug drilling and grinding anti-torsion device and anti-torsion monitoring system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3922956A (en) * | 1971-11-09 | 1975-12-02 | Renold Ltd | Hydraulic motors |
| US4256018A (en) * | 1978-05-22 | 1981-03-17 | Poclain Hydraulics | Radial piston fluid engine |
| JPH04219469A (en) * | 1990-02-16 | 1992-08-10 | Mannesmann Rexroth Gmbh | Radial piston machine and manufacture of receiving chamber of piston and roller in cylinder block of said machine |
| JP2008196410A (en) * | 2007-02-14 | 2008-08-28 | Daikin Ind Ltd | Radial piston machine |
| CN203822539U (en) * | 2014-04-29 | 2014-09-10 | 安徽理工大学 | Torque self-checking inner curve hydraulic motor |
-
2014
- 2014-04-29 CN CN201410178048.1A patent/CN103939275B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3922956A (en) * | 1971-11-09 | 1975-12-02 | Renold Ltd | Hydraulic motors |
| US4256018A (en) * | 1978-05-22 | 1981-03-17 | Poclain Hydraulics | Radial piston fluid engine |
| JPH04219469A (en) * | 1990-02-16 | 1992-08-10 | Mannesmann Rexroth Gmbh | Radial piston machine and manufacture of receiving chamber of piston and roller in cylinder block of said machine |
| JP2008196410A (en) * | 2007-02-14 | 2008-08-28 | Daikin Ind Ltd | Radial piston machine |
| CN203822539U (en) * | 2014-04-29 | 2014-09-10 | 安徽理工大学 | Torque self-checking inner curve hydraulic motor |
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| CN103939275A (en) | 2014-07-23 |
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Effective date of registration: 20180523 Address after: 341600 Jiangxi Ganzhou Xinfeng County Industrial Park West Section of the light road Patentee after: Ganzhou double raw Electronics Co., Ltd. Address before: No. 168 Shun Geng Middle Road, Huainan, Anhui Province Patentee before: Anhui University Of Science And Technology |
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Granted publication date: 20160106 Termination date: 20190429 |