CN201265641Y - Planet gear speed-increasing box with variable gear ratio - Google Patents
Planet gear speed-increasing box with variable gear ratio Download PDFInfo
- Publication number
- CN201265641Y CN201265641Y CNU2008201361702U CN200820136170U CN201265641Y CN 201265641 Y CN201265641 Y CN 201265641Y CN U2008201361702 U CNU2008201361702 U CN U2008201361702U CN 200820136170 U CN200820136170 U CN 200820136170U CN 201265641 Y CN201265641 Y CN 201265641Y
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- oil pump
- gear
- output shaft
- gear ring
- planet
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Abstract
On the basis of the traditional NGW planet speed increasing box, a planetary stage gear ring is prepared into a rotatable mode, and an outer gear is coaxially processed on the inner gear ring to form an inner and outer gear ring. Because the inner and outer gear ring drives a volume oil pump by an oil pump gear driving mechanism, an oil pump outlet is additionally provided with an oil outlet with an adjustable area; because the inner and outer gear ring bears the acting force of the circumferential direction of a planet wheel, the inner and outer gear ring tends to rotate in the same direction with the output shaft, thus the rotating speed of the oil pump is controlled through controlling the oil discharging quality of the oil pump, and a large gear ring is controlled to rotate at a certain rotation speed. Because the rotating direction of the large gear ring is the same with the rotating direction of the output shaft, the actual rotating speed of the output shaft is reduced to further change the driving rate, and moreover, the rotating speed can be changed continuously.
Description
Technical field
The utility model relates to gear-box, especially a kind of planet step-up gear of variable gear ratio.
Background technique
Gear-box is the critical component of wind-driven generator, and the wind-driven generator of China's MW class all adopts the planetary stage step-up gear at present.The example of this class planet speedup box is disclosed in Chinese patent CN1427149A and CN2893312Y.But the shortcoming of the planet speedup box that these are traditional is a gear ratio can not be changed.And wind wheel is only just caught more wind energy under the condition of variable-speed operation.So this unit is so can only adopt the double-fed generator of variable speed operation to satisfy the requirement of speed change usually.And double-fed generator must be furnished with 1/3 flat-out current transformer, makes product complicated, brings the increase of cost, and the electric energy quality is bad.
Therefore, need in wind-driven generator, adopt the variable speed planetary gearbox, satisfying needs, thereby can adopt the general synchronous generator of constant-speed operation, get rid of current transformer, reduce cost, and improved the electric energy quality greatly the wind wheel variable-speed operation.
Summary of the invention
For overcoming the deficiency of traditional planet speedup box, the utility model provides a kind of planetary gearbox of variable gear ratio, comprise input shaft, planet speedup level, the oil pump gear driving mechanism, control unit and output shaft, wherein planet speedup level comprises sun gear, planetary pinion and can change interior external toothing, control unit comprises volume oil pump and control unit, wherein interior external toothing comprises internal gear and external gear, internal gear and external gear are coaxial, and internal gear and planet wheel engagement, drive the volume oil pump by external gear in this by the oil pump gear driving mechanism, and install the controlled oil outlet of area additional in the outlet port of volume oil pump, because the interior external toothing of planet speedup level is subjected to the active force of the circumferencial direction of planet wheel, so have rotation trend, its sense of rotation and output shaft are in the same way, thereby oil drain quantity by control volume oil pump, and then the rotating speed of control volume oil pump, external toothing has certain rotating speed in making, because turning to of interior external toothing is identical with turning to of output shaft, reduce the rotating speed of output shaft, thereby changed the velocity ratio of gear speedup case.
Selectively, velocity ratio within the specific limits be continuous variable.
Also selectively, install elastic element additional, be used for absorbing the impact of whole transmission process, reduce the dynamic load amplitude of load-carrying unit in the transmission process in volume oil pump outlet port.
Also selectively, adopt the HYDRAULIC CONTROL SYSTEM pump speed, this hydraulic system comprises servo amplification unit, actuator, Flow characteristics computing unit, revolution speed property calculation unit and revolution speed feedback unit.
The conventional speedup box factory of MW class wind turbine group adds two-stage parallel axis gear transmission level by the transmission of one-level planet tooth usually and forms, or the two-stage Gear Planet Transmission adds the transmission of one-level parallel-axes gears and forms.Variable speed planetary pinion speedup level of the present invention can be installed on any one-level planetary stage, all can satisfy the needs to the wind wheel variable-speed operation.After adopting the variable gear ratio speedup box, wind-driven generator can adopt the general synchronous generator of constant-speed operation, has got rid of current transformer, has reduced cost, and has improved the electric energy quality greatly.
Description of drawings
Fig. 1 is the structure principle chart of the planetary gearbox of variable gear ratio of the present utility model;
Fig. 2 is the stressed sketch of planet speedup level of the planetary gearbox of variable gear ratio of the present utility model.
Fig. 3 is the skeleton diagram of hydraulic control system.
Embodiment
Fig. 1 is the structure principle chart of the planetary gearbox of variable gear ratio of the present utility model, and the planetary gearbox of the variable gear ratio shown in the figure comprises input shaft 1, planet speedup level 2, oil pump gear driving mechanism 5, control unit 6 and output shaft 9.Planet speedup level 2 comprises sun gear 3, planetary pinion 10 and can change interior external toothing 4.Control unit 6 comprises volume oil pump 7 and control unit 8.Interior external toothing 4 comprises internal gear and external gear, internal gear and external gear are coaxial, and internal gear and planet wheel 10 engagements drive volume oil pump 7 by interior external gear by oil pump gear driving mechanism 5, and install the controlled oil outlet of area additional in the outlet port of volume oil pump 7.Be subjected to the active force of the circumferencial direction of planet wheel by the interior external toothing of planet speedup level 2, so have rotation trend, its sense of rotation and output shaft are in the same way, thereby oil drain quantity by control volume oil pump 7, and then the rotating speed of control volume oil pump 7, external toothing has certain rotating speed in making, because turning to of interior external toothing is identical with turning to of output shaft, reduce the rotating speed of output shaft, thereby changed the velocity ratio of gear speedup case.This velocity ratio is continuous variable within the specific limits.Also can install elastic element additional, be used for absorbing the impact of whole transmission process, reduce the dynamic load amplitude of load-carrying unit in the transmission process in volume oil pump 7 outlet ports.
Planetary gearbox of the present utility model is made the ring gear of planetary stage rotating on the basis of traditional NGW planet speedup box, and processes an external gear on this ring gear coaxially, forms an interior external toothing.External gear by interior external toothing drives volume oil pump 7 by oil pump gear driving mechanism 5, and installs the controlled oil outlet of area additional in the oil pump outlet.Because interior external toothing is subjected to the active force of the circumferencial direction of planet wheel, so rotation trend is arranged, sense of rotation and output shaft are in the same way.So can promptly control pump speed by the oil drain quantity of control oil pump 7, and then external toothing has certain rotating speed in the control.Because turning to of interior external toothing is identical with turning to of output shaft, thus the actual speed of output shaft reduced, and then realize changing the purpose of velocity ratio, and the change of this velocity ratio can be continuous.
The stressed sketch of planet speedup level 2 as shown in Figure 2.N is the sense of rotation of input shaft among Fig. 2.
During operation, input shaft has a peripheral force Q to planet wheel 10, and interior external toothing 4 and sun gear 3 have peripheral force P and P1 to planet wheel 10 respectively upper and lower.Simultaneously peripheral force P has a reaction force to interior external toothing 4, and this reaction force makes gear ring be subjected to moment M with the steering input shaft equidirectional.In case interior external toothing 4 loses constraint and will rotate.
If when interior external toothing 4 did not change, the input and output rotating speed was respectively n1 and n2, then speed increasing ratio at this moment is:
i＝n2/n1
If volume oil pump 7 is subjected to the control of hydraulic fluid port aperture on the oil circuit, there is certain oil mass to discharge, when external toothing 4 was with the n3 rotational speed in making, then the actual speed of output shaft was for answering n2-n3.At this moment speed increasing ratio is:
i’＝(n2-n3)/n1
Utilize hydraulic control system can realize that the oil extraction flow changes continuously, thereby can realize the adjustable continuously of speedup box speed ratio.
Press the linear changing relation for the variation that guarantees speed ratio with the rotating speed of main shaft, can hydraulic system be set by Fig. 3.This hydraulic system comprises servo amplification unit, actuator, Flow characteristics computing unit, revolution speed property calculation unit and revolution speed feedback unit.
Planetary gearbox of the present utility model is used in and has realized the adjustable continuously of variable gear ratio on the large-scale wind driven generator, can satisfy needs to the wind wheel variable-speed operation, thereby can make the wind-powered electricity generation unit adopt the general synchronous generator of constant-speed operation, got rid of current transformer, reduce cost, and improved the electric energy quality greatly.In addition, in the pressure circuit of oil pump outlet, also can add elastic element in case of necessity, to reduce the peak value of dynamic load in the Transmitted chains.This speedup box also can be applicable to the various fields that need to adopt the planet tool wheel speedup box that changes gear ratio.
Claims (4)
1, a kind of planetary gearbox of variable gear ratio, comprise input shaft (1), planet speedup level (2), oil pump gear driving mechanism (5), control unit (6) and output shaft (9), wherein planet speedup level (2) comprises sun gear (3), planetary pinion (10) and can change interior external toothing (4), control unit (6) comprises volume oil pump (7) and control unit (8), it is characterized in that:
Interior external toothing (4) comprises internal gear and external gear, internal gear and external gear are coaxial, and internal gear and planet wheel (10) engagement, drive volume oil pump (7) by external gear in this by oil pump gear driving mechanism (5), and install the controlled oil outlet of area additional in the outlet port of volume oil pump (7), because the interior external toothing of planet speedup level (2) is subjected to the active force of the circumferencial direction of planet wheel, so have rotation trend, its sense of rotation and output shaft are in the same way, thereby oil drain quantity by control volume oil pump (7), and then the rotating speed of control volume oil pump (7), external toothing has certain rotating speed in making, because turning to of interior external toothing is identical with turning to of output shaft, has reduced the rotating speed of output shaft, thereby changed the velocity ratio of gear speedup case.
2, the planetary gearbox of variable gear ratio according to claim 1 is characterized in that: described velocity ratio within the specific limits be continuous variable.
3, the planetary gearbox of variable gear ratio according to claim 1 is characterized in that: install elastic element additional in volume oil pump (7) outlet port, be used for absorbing the impact of whole transmission process, reduce the dynamic load amplitude of load-carrying unit in the transmission process.
4, the planetary gearbox of variable gear ratio according to claim 1, it is characterized in that: adopt the HYDRAULIC CONTROL SYSTEM pump speed, this hydraulic system comprises servo amplification unit, actuator, Flow characteristics computing unit, revolution speed property calculation unit and revolution speed feedback unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201361702U CN201265641Y (en) | 2008-10-07 | 2008-10-07 | Planet gear speed-increasing box with variable gear ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201361702U CN201265641Y (en) | 2008-10-07 | 2008-10-07 | Planet gear speed-increasing box with variable gear ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201265641Y true CN201265641Y (en) | 2009-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201361702U Expired - Fee Related CN201265641Y (en) | 2008-10-07 | 2008-10-07 | Planet gear speed-increasing box with variable gear ratio |
Country Status (1)
| Country | Link |
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| CN (1) | CN201265641Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511471A (en) * | 2013-09-22 | 2014-01-15 | 西安交通大学 | Main shaft bearing and transmission device |
| CN103620221A (en) * | 2011-12-28 | 2014-03-05 | 萱场工业株式会社 | Electric oil pump |
| CN106195135A (en) * | 2016-07-15 | 2016-12-07 | 上海宇航***工程研究所 | The hatch door locking of a kind of space and the manual driving device unlocked |
| CN106763526A (en) * | 2016-12-07 | 2017-05-31 | 长兴柔昊精密科技有限公司 | Robot precision joint speed reducer |
| CN108343732A (en) * | 2017-01-23 | 2018-07-31 | 郑州宇通客车股份有限公司 | Power plant and the vehicle for using the power plant |
| CN108340762A (en) * | 2017-01-23 | 2018-07-31 | 郑州宇通客车股份有限公司 | Vehicle and its power plant |
-
2008
- 2008-10-07 CN CNU2008201361702U patent/CN201265641Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620221A (en) * | 2011-12-28 | 2014-03-05 | 萱场工业株式会社 | Electric oil pump |
| CN103620221B (en) * | 2011-12-28 | 2016-03-30 | Ｋｙｂ株式会社 | Electric oil pump |
| CN103511471A (en) * | 2013-09-22 | 2014-01-15 | 西安交通大学 | Main shaft bearing and transmission device |
| CN106195135A (en) * | 2016-07-15 | 2016-12-07 | 上海宇航***工程研究所 | The hatch door locking of a kind of space and the manual driving device unlocked |
| CN106763526A (en) * | 2016-12-07 | 2017-05-31 | 长兴柔昊精密科技有限公司 | Robot precision joint speed reducer |
| CN106763526B (en) * | 2016-12-07 | 2019-11-19 | 长兴柔昊精密科技有限公司 | Robot precision joint speed reducer |
| CN108343732A (en) * | 2017-01-23 | 2018-07-31 | 郑州宇通客车股份有限公司 | Power plant and the vehicle for using the power plant |
| CN108340762A (en) * | 2017-01-23 | 2018-07-31 | 郑州宇通客车股份有限公司 | Vehicle and its power plant |
| CN108343732B (en) * | 2017-01-23 | 2023-09-08 | 宇通客车股份有限公司 | Power device and vehicle using same |
| CN108340762B (en) * | 2017-01-23 | 2023-09-08 | 宇通客车股份有限公司 | Vehicle and power device thereof |
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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: 20090701 Termination date: 20101007 |