CN103939564A - Hydraulic speed adjusting device - Google Patents

Hydraulic speed adjusting device Download PDF

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Publication number
CN103939564A
CN103939564A CN201310497380.XA CN201310497380A CN103939564A CN 103939564 A CN103939564 A CN 103939564A CN 201310497380 A CN201310497380 A CN 201310497380A CN 103939564 A CN103939564 A CN 103939564A
Authority
CN
China
Prior art keywords
level
gear
speed
torque converter
hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310497380.XA
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Chinese (zh)
Inventor
才委
张增祥
马文星
付红超
王青松
刘浩
钱军
戴虎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Advance Gearbox Group Co Ltd
Original Assignee
Hangzhou Advance Gearbox Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Advance Gearbox Group Co Ltd filed Critical Hangzhou Advance Gearbox Group Co Ltd
Priority to CN201310497380.XA priority Critical patent/CN103939564A/en
Publication of CN103939564A publication Critical patent/CN103939564A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H41/00Rotary fluid gearing of the hydrokinetic type
    • F16H41/04Combined pump-turbine units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H47/00Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/06Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type
    • F16H47/08Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type the mechanical gearing being of the type with members having orbital motion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26Generation or transmission of movements for final actuating mechanisms
    • F16H61/28Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32Electric motors actuators or related electrical control means therefor

Abstract

A hydraulic speed adjusting device mainly comprises a second-level planetary gear transmission mechanism, a guiding vane adjustable hydraulic torque converter and a guiding vane adjusting mechanism. The hydraulic speed adjusting device is characterized in that changing rotating speed and torque are in input connection with an input shaft which is connected with a first-level planet carrier, the first-level planet carrier is connected with an output shaft through a first-level planet wheel and a first-level sun wheel which are connected, according to the hydraulic speed adjusting device, the speed adjusting range can be automatically selected according to the power input speed feature of an application place, the opening degree of a guiding vane of the torque converter is adjusted to be large, so that the torque converter absorbs more power, accordingly, output constant speed is achieved, when input rotating speed is lowered, the opening degree of the guiding vane of the torque converter is adjusted to be small, so that the torque converter absorbs less power, accordingly, output constant speed is achieved, the range is adjusted, the hydraulic torque converter used in the hydraulic speed adjusting device is provided with five working wheels, a pump wheel is a leaning-forward space twisting vane, torque is large, power flow dividing effect is obvious, the structure is simple, and manufacturing is easy.

Description

A kind of hydraulic speed-regulating device
Technical field
The present invention relates to a kind of hydraulic speed-regulating device, particularly relate to a kind of driving mechanism, guide vane adjustable hydraulic torque converter of secondary planetary gear, the hydraulic speed-regulating device of stator adjusting control mechanism composition, while being mainly used in the occasion such as boats and ships, wind-powered electricity generation, can make working machine move with a certain constant speed.
Background technique
Abroad in Recent Years hydraudynamic drive technology has had breakthrough progress in many aspects, is included in the application in blower fan and pump class, and it,, transmitting in the rated speed of motor, has improved power, has the advantage such as energy-saving effect and safety reliability.
Aspect the speed governing driving of heavy duty, high-power (MW class) equipment, hydrodynamic unit more shows its superior transmission performance, the scope of application is just sent induced draught fan, slag stock pump, gas turbine starting drive by boiler feed pump, boiler in traditional power industry, expands to dedusting steel-smelting converter blower fan, coal smoke in steel industry and transports the every field such as blower fan, drilling at the sea, wind-power electricity generation.Stator is adjustable, and hydraulic gear can be applied in other engineering machinery simultaneously, such as being applied to dredger, decline and in operation cycle of power zero, utilize the adjustable characteristic of torque-converters function in the lifting of bottom grab, speed stabilizing, automatically adjusting tractive force to adapt to job requirement.Therefore need the occasion constantly changing can consider to apply guide vane adjustable hydraulic torque converter at power, its usability has reached the needs of engineering.
The particularly application on large-scale wind generating equipment, the superiority of the hydraudynamic drive more highlighting; Utilize wind-powered electricity generation unit to generate electricity by way of merging two or more grid systems, the rotating speed that the rotating speed of variation and torque are transformed into frequency stabilization by transmission system is delivered on generator, the hydraulic speed-regulating transmission system that the mechanism of power dividing just relying on and stator adjustable hydraulic torque converter match, to ensure that wind-powered electricity generation unit is efficient, stable, to generate electricity by way of merging two or more grid systems reliably.It is a kind of novel variable speed constant frequency technology, not only meet the technology trends of wind-powered electricity generation unit, and holding of adjustable torque converter is large, power/quality is than large, electrodeless variable-speed, isolation decay torsional oscillation, the features such as wider working speed regulation range, can make the stable ability of generating electricity by way of merging two or more grid systems of wind turbine group strengthen, wind-powered electricity generation unit power train volume and cost decline, the impact that system is born and dynamic load reduce, equipment parallel-adder settle-out time and life-span increase, will promote effectively the progress of wind generating technology, also will make hydraudynamic drive have broader using scope, promote the development of hydraudynamic drive.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, provide a kind of speed-regulating range width, simple in structure, control hydraulic speed-regulating device easy and applied widely.
The object of the invention is to be achieved through the following technical solutions: described a kind of hydraulic speed-regulating device, it is mainly made up of secondary planetary gear driving mechanism, guide vane adjustable hydraulic torque converter, stator controlling mechanism three parts, the rotating speed of variation is connected input shaft with torque input, input shaft is connected with first order planet carrier, and is connected with output shaft by the first order sun gear on connected first order planet wheel and output shaft by this first order planet carrier;
Described output shaft is connected by interior external gear with torque converter output shaft, torque converter output shaft is connected with pump impeller, and pump impeller disposed adjacent has by hex head bolt and is rigidly connected and realizes one-level turbine and the two-stage turbine of synchronous rotation and dispose the adjustable guide wheel that changes the capable of regulating blade angle of the output speed of two turbines by control system; Described one-level turbine is connected with the second level sun gear being placed on output shaft by connected turbine hub with two-stage turbine, this second level sun gear is by being placed in the second level planet wheel engagement in the planet axis of the second level, this second planet wheel is engaged with second level inner gear ring, and described second level inner gear ring is connected with first order ring gear; First order ring gear engages with the first order planet wheel being nested with in first order planet axis, and this first order planet wheel engages with the first order sun gear being connected on output shaft, real power cycle and shunting.
Described control system is mainly made up of stepper motor, driver and controller, be connected with two pairs of gear reduction pairs with controller, and engage with synchronization regulation gear, described synchronization regulation gear is connected with synchronization regulation dish, is fixed with the straight pin that can realize circular-rotation on synchronization regulation dish; Straight pin, by rotating the effect of groove on shift fork, rotates it, thereby changes adjustable guide wheel stator angle centered by guide wheel blade bobbin.
Described guide vane adjustable hydraulic torque converter comprises pump impeller, one-level turbine, two-stage turbine, adjustable guide wheel; The blade of wherein said pump impeller is spatial warping blade; The blade of described adjustable guide wheel and two turbines is column blade, and it is simple in structure, is convenient to production and processing and location is installed; Described second level inner gear ring is connected by fastening piece, connecting ring, connecting cylinder with first order ring gear.
Described driver and stepper motor have formed electric machine actuating mechanism, and by controller, by input speed, output speed, constant rotating speed of target and the dynamic characteristic of torque-converters combine, and obtain feedback command, regulating and controlling mechanism sense of rotation and position; Described electric actuator is adjusted precision and corresponding speed in order to set.Synchronization regulation gear drives two pairs of gear pairs to drive deceleration by stepper motor, then drives moving each of synchronization regulation dribbling to rotate shift fork motion by screw attachment; Shift fork one end rotates along with the boss on synchronization regulation dish, does linear motion again with respect to the boss on synchronization regulation dish along the groove of self structure; The connecting rod that the other end of shift fork is connected with adjustable vane by hexagon head bolt connects, and along with the rotation of synchronization regulation dish, shift fork drives adjustable vane to rotate.
The present invention has following useful technique effect:
1) hydraulic speed-regulating device of the present invention can be selected speed adjustable range automatically according to the power input speed characteristic of application.In the time that input speed raises, by tuning up torque-converters guide vane opening, make torque-converters absorb more power, thereby make to export constant speed; In the time that input speed reduces, by turning torque-converters guide vane opening down, make torque-converters absorb less power, thereby make to export constant speed; Regulation range is wide;
2) fluid torque converter that hydraulic speed-regulating device of the present invention adopts is five active wheels, and wherein pump impeller is FC spatial warping blade, and torque is larger, and power dividing effect is remarkable; Turbine and guide wheel are column blade, simple in structure, easy to manufacture;
3) controlling mechanism of the adjustable guide wheel of hydraulic speed-regulating device of the present invention drives speed reducing gear pair by stepper motor, by gear pair, motion is passed on synchronization regulation dish, and then all stators are synchronously moved according to control command.Control simplyr, speed of response is faster.
Brief description of the drawings
Fig. 1 is secondary planetary gear driving mechanism assembling schematic diagram of the present invention.
Fig. 2 is guide vane adjustable hydraulic torque converter assembling schematic diagram of the present invention.
Fig. 3 is stator controlling mechanism assembling schematic diagram one of the present invention.
Fig. 4 is stator controlling mechanism assembling schematic diagram one of the present invention.
Label shown in Fig. 1 has: 1. deep groove ball bearing, 2. lip-type packing, 3. input shaft, 4. first order sun gear, 5. front back-up ring, 6. hexagon head bolt, 7. spring washer, 8. first order planet wheel shaft, 9. tapered roller bearing, 10. back-up ring, 11. first order planet carriers, 12. first order planet wheels, 13. first order ring gears, 14. shells, 15. plain washers, 16. hexagonal spiro plugs, 17. fastening pieces, 18. connecting rings, 19. connecting cylinders, 20. position stop blocks, 21. baffle plates, 22. second level planetary wheel carriers, 23. second level ring gears, 24. end caps, 25. second level planet wheels, 26. fixed blocks, 27. socket head screws, 28. second level planet wheel shafts, 29. sleeves, 30. second level sun gears, 31. output shafts,
Label shown in Fig. 2 has: 32. casings, 33. hexagon head bolts, 34. spring washers, 35. one-level turbines, 36. countersunk not chipped rivets, 37. oil sealing linings, 38. seal rings, 39. ball bearings, 40. turbine hubs, 41. shaft block rings, 42. needle bearings, 43. spacers, 44. pump impellers, 45. hexagon head bolts, 46. two-stage turbines, 47. stator rings, the adjustable guide wheel outer shroud of 48. torque-converters, 49. adjustable guide wheels, 50. setting sleeves, 51. seal cartridges, 52.O shape circle, 53. output end caps, 54. pressing plates, 55. torque converter output shafts, 56. output flanges, 57. case lids, 58. outer shroud covers,
Label shown in Fig. 3,4 has: 59. rotate shift fork, 60. hexagon head bolts, 61. spring washers, 62. nuts, 63. stepper motors+driver+controller, 64. motor cabinets, 65. flat keys, 66. motor gears, 67. Cock screws, 68. driving gear one, 69. driving gear two, 70. ball bearings, 71. transmission shafts 72. hold mill pad, 73. linings, 74. spacers, 75.O shape circle, 76. steel balls, 77. plain cushions, 78. cotter pins, 79. straight pins, 80. synchronization regulation dishes, 81. setting sleeves, 82. synchronization regulation gears.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated: shown in Fig. 1, a kind of hydraulic speed-regulating device of the present invention, it is mainly made up of secondary planetary gear driving mechanism, guide vane adjustable hydraulic torque converter, stator controlling mechanism three parts, the rotating speed of variation is connected input shaft 3 with torque input, input shaft 3 is connected with first order planet carrier 11, and is connected with output shaft 31 by the first order sun gear 4 on connected first order planet wheel 12 and output shaft by this first order planet carrier 11;
Shown in Fig. 2, described output shaft 31 is connected by interior external gear with torque converter output shaft 55, torque converter output shaft 55 is connected with pump impeller 44, and pump impeller 44 disposed adjacent have by hex head bolt 45 and are rigidly connected and realize one-level turbine 35 and the two-stage turbine 46 of synchronous rotation and dispose the adjustable guide wheel 49 that changes the capable of regulating blade angle of the output speed of two turbines by control system; Described one-level turbine 35 is connected with the second level sun gear 30 being placed on output shaft 31 by connected turbine hub 40 with two-stage turbine 46, this second level sun gear 30 is by being placed in the second level planet wheel engagement in second level planet axis 28, this second planet wheel 25 is engaged with second level inner gear ring 23, and described second level inner gear ring 23 is connected by fastening piece 17, connecting ring 18, connecting cylinder 19 with first order ring gear 13; First order ring gear 13 engages with the first order planet wheel 12 being nested with in first order planet axis, and this first order planet wheel 12 engages with the first order sun gear 4 being connected on output shaft 31, real power cycle and shunting.
Shown in Fig. 3,4, described control system is mainly made up of stepper motor, driver and controller 63, be connected with two pairs of gear reduction pairs with controller, and engage with synchronization regulation gear 82, described synchronization regulation gear 82 is connected with synchronization regulation dish 80, is fixed with the straight pin 79 that can realize circular-rotation on synchronization regulation dish; Straight pin 79, by rotating the effect of groove on shift fork 59, rotates it, thereby changes adjustable guide wheel 49 stator angles centered by guide wheel blade bobbin.
Described guide vane adjustable hydraulic torque converter comprises pump impeller, one-level turbine, two-stage turbine, adjustable guide wheel; The blade of wherein said pump impeller is spatial warping blade; The blade of described adjustable guide wheel and two turbines is column blade.
Embodiment:
Power dividing, as shown in the figure, hydraulic speed-regulating device of the present invention is mainly made up of secondary planetary gear driving mechanism, guide vane adjustable hydraulic torque converter, stator controlling mechanism three parts.
As shown in Figure 1, the rotating speed of variation and torque are inputted by input shaft 3.Input shaft 3 drives first order planet wheel 12 to rotate by first order planet carrier 11, thereby the sun gear rotation realizing on output shaft 31 drives output shaft 31 to rotate.
As shown in Figure 1, 2, the output shaft 31 in Fig. 1 is connected and is realized Synchronous Transmission by interior external gear with the torque converter output shaft 55 in Fig. 2.Torque converter output shaft 55 is connected with converter pump 44, drives the rotation of pump impeller.By fluid torque converter internal work, energy is reached one-level turbine 35 and two-stage turbine 46 by pump impeller 44, and wherein two turbines are rigidly connected and are realized synchronous rotation by hex head bolt 45.By regulating adjustable guide wheel 49 blade angles, change the output speed of two turbines.One-level turbine 35 and two-stage turbine 46 drive second level sun gear 30 to rotate by turbine hub 40.Second level planet wheel 25, due to the restriction of second level planet wheel shaft 28 to its degrees of freedom, can only pivot, thereby the rotation of second level sun gear 30 is delivered on second level ring gear 23, realizes its rotation.Second level inner gear ring 23 is connected by fastening piece 17, connecting ring 18, connecting cylinder 19 with first order ring gear 13, and power is delivered to first order ring gear 13 from second level ring gear 23.Finally, because the first order ring gear in first order planetary gear train 13 acts on first order planet wheel 12, again power is passed to output shaft 31, thereby realized power cycle and shunting: by the power dividing on input shaft 31 on secondary planetary gear driving mechanism and guide vane adjustable hydraulic torque converter, reach circulation in Partial Power, realize power dividing.
Hydraulic speed-regulating, the hydraulic speed-regulating of guide vane adjustable hydraulic torque converter, is mainly to regulate adjustable guide wheel 49 stator angles by stepper motor+driver+controller 63, changes one-level turbine 35 and two-stage turbine 46 output speeds, thereby realizes hydraulic speed-regulating;
As shown in Figure 3,4, adjustable guide wheel 49, because restriction only has rotation one degree of freedom, is fixedly connected with rotation shift fork 59 by bolt and nut.Rotate when stepper motor+driver+controller 63 sends signal, slowed down and transmission is reached to synchronization regulation gear 82 by two pairs of gear pairs, while driving synchronization regulation dish 80 to rotate, the straight pin 79 being fixed on dish is realized circular-rotation; In the time of straight pin 79 circular-rotation, owing to rotating the effect of groove on shift fork 59, it is rotated centered by guide wheel blade bobbin, thereby change adjustable guide wheel 49 stator angles, thus the output speed of control two turbines.This hydraulic speed-regulating device output speed is secondary planetary gear driving mechanism and the coefficient result of guide vane adjustable hydraulic torque converter, pass through said apparatus, under different input speeds, guide wheel 49 stator angles that appropriate change is adjustable, change the output speed of two turbines, final realization is transformed into the rotating speed of variation and torque the rotating speed output of frequency stabilization by this transmission system.

Claims (3)

1. a hydraulic speed-regulating device, it is mainly made up of secondary planetary gear driving mechanism, guide vane adjustable hydraulic torque converter, stator controlling mechanism three parts, it is characterized in that: the rotating speed of variation is connected input shaft (3) with torque input, input shaft (3) is connected with first order planet carrier (11), and is connected with output shaft (31) by the first order sun gear (4) on connected first order planet wheel (12) and output shaft by this first order planet carrier (11);
Described output shaft (31) is connected by interior external gear with torque converter output shaft (55), torque converter output shaft (55) is connected with pump impeller (44), and pump impeller (44) disposed adjacent has by hex head bolt (45) and is rigidly connected and realizes one-level turbine (35) and the two-stage turbine (46) of synchronous rotation and dispose the adjustable guide wheel (49) that changes the capable of regulating blade angle of the output speed of two turbines by control system; Described one-level turbine (35) is connected with the second level sun gear (30) being placed on output shaft (31) by connected turbine hub (40) with two-stage turbine (46), this second level sun gear (30) is by being placed in the second level planet wheel engagement in second level planet axis (28), this second planet wheel (25) is engaged with second level inner gear ring (23), and described second level inner gear ring (23) is connected with first order ring gear (13); First order ring gear (13) engages with the first order planet wheel (12) being nested with in first order planet axis, and this first order planet wheel (12) engages with the first order sun gear (4) being connected on output shaft (31), real power cycle and shunting.
2. hydraulic speed-regulating device according to claim 1, it is characterized in that described control system is mainly made up of stepper motor, driver and controller (63), be connected with two pairs of gear reduction pairs with controller, and engage with synchronization regulation gear (82), described synchronization regulation gear (82) is connected with synchronization regulation dish (80), is fixed with the straight pin (79) that can realize circular-rotation on synchronization regulation dish; Straight pin (79), by rotating the effect of the upper groove of shift fork (59), rotates it, thereby changes adjustable guide wheel (49) stator angle centered by guide wheel blade bobbin.
3. hydraulic speed-regulating device according to claim 1, is characterized in that described guide vane adjustable hydraulic torque converter comprises pump impeller, one-level turbine, two-stage turbine, adjustable guide wheel; The blade of wherein said pump impeller is spatial warping blade; The blade of described adjustable guide wheel and two turbines is column blade; Described second level inner gear ring (23) is connected by fastening piece (17), connecting ring (18), connecting cylinder (19) with first order ring gear (13).
CN201310497380.XA 2013-10-22 2013-10-22 Hydraulic speed adjusting device Pending CN103939564A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358852A (en) * 2014-11-07 2015-02-18 吉林大学 Axial flow type guide vane adjustable hydraulic torque converter and guide vane adjusting method
CN105889451A (en) * 2016-06-22 2016-08-24 大连交通大学 Variable speed input and constant speed output electricity generation speed regulation system for regulation of guide vane adjustable torque converter
CN105972181A (en) * 2016-06-22 2016-09-28 大连交通大学 Hydraulic torque converter with adjustable guide wheel vanes
CN106321771A (en) * 2016-11-08 2017-01-11 哈尔滨广瀚动力传动有限公司 Novel double-turbine double-guide wheel guide vane adjustable type hydraulic torque converter
CN109099081A (en) * 2018-11-13 2018-12-28 吉林大学 A kind of self-adjustable Retarder rotor of blade tilt
CN110230679A (en) * 2019-05-17 2019-09-13 陕西科技大学 A kind of fluid torque-converter angle adjustment guiding device

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US4012908A (en) * 1976-01-30 1977-03-22 Twin Disc, Incorporated Torque converter having adjustably movable stator vane sections
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CN101050753A (en) * 2003-12-23 2007-10-10 沃伊特涡轮两合公司 Control system for wind turbine with hydrodynamic transmission
CN102301585A (en) * 2009-01-30 2011-12-28 德风公司 Wind Turbine With Lvrt Capabilities
CN203570971U (en) * 2013-10-22 2014-04-30 杭州前进齿轮箱集团股份有限公司 Hydraulic speed regulating device

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358852A (en) * 2014-11-07 2015-02-18 吉林大学 Axial flow type guide vane adjustable hydraulic torque converter and guide vane adjusting method
CN105889451A (en) * 2016-06-22 2016-08-24 大连交通大学 Variable speed input and constant speed output electricity generation speed regulation system for regulation of guide vane adjustable torque converter
CN105972181A (en) * 2016-06-22 2016-09-28 大连交通大学 Hydraulic torque converter with adjustable guide wheel vanes
CN105972181B (en) * 2016-06-22 2018-06-19 大连交通大学 guide vane adjustable hydraulic torque converter
CN106321771A (en) * 2016-11-08 2017-01-11 哈尔滨广瀚动力传动有限公司 Novel double-turbine double-guide wheel guide vane adjustable type hydraulic torque converter
CN106321771B (en) * 2016-11-08 2018-12-18 哈尔滨广瀚动力传动有限公司 A kind of double guide wheel guide vane adjustable hydraulic torque converters of novel twin turbines
CN109099081A (en) * 2018-11-13 2018-12-28 吉林大学 A kind of self-adjustable Retarder rotor of blade tilt
CN109099081B (en) * 2018-11-13 2022-02-08 吉林大学 Hydraulic retarder rotor with blade inclination angle capable of being automatically adjusted
CN110230679A (en) * 2019-05-17 2019-09-13 陕西科技大学 A kind of fluid torque-converter angle adjustment guiding device

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