CN107120239B

CN107120239B - Wind-driven generator

Info

Publication number: CN107120239B
Application number: CN201710143031.6A
Authority: CN
Inventors: 连军义; 贝恩德·弗留格尔; 何志杰
Original assignee: Lien Transmission Equipment Changzhou Co ltd
Current assignee: Lien Transmission Equipment Changzhou Co ltd
Priority date: 2017-03-10
Filing date: 2017-03-10
Publication date: 2023-04-18
Anticipated expiration: 2037-03-10
Also published as: CN107120239A

Abstract

The invention relates to the technical field of wind driven generators, in particular to a wind driven generator which comprises an outer shell, wherein blades are rotatably arranged on the outer shell, a gear box is arranged in the outer shell, the input end of the gear box is in transmission connection with the blades, when the wind driven generator is used, a bidirectional slip torque limiter is connected in series with a unidirectional slip torque limiter, the bidirectional slip torque limiter sets high slip torque to ensure the normal operation of equipment and avoid the high forward impact, and the unidirectional slip torque limiter sets low slip torque to weaken the reverse impact on the equipment during the normal operation. Therefore, the bidirectional asymmetric slip protection device realizes bidirectional asymmetric slip protection, further weakens reverse impact between the generator set and the gear box while providing forward overload protection, plays a role in protecting equipment such as the gear box and the like, and has a shock absorption or damping effect.

Description

Wind power generator

Technical Field

The invention relates to the technical field of wind driven generators, in particular to a wind driven generator.

Background

The wind driven generator drives the blades to rotate through natural wind, so that the blades drive the gear box, and finally, the gear box and the generator set transmit power through the installation of the coupler, and the generator set rotates to generate electricity. In order to prevent the over-torsion between the gear box and the generator set, which causes the gear box or the generator set to be damaged, a torque limiter is usually added on the coupling, and the existing torque limiter usually plays a role in forward overload protection. The reverse torque exists in the transmission system of the wind driven generator, and the torque force of reverse impact is far smaller than the set slipping torque force of forward overload protection and is not enough to trigger the slipping of the traditional torque limiter, so that the torque limiter cannot avoid or weaken the reverse impact force, and the damage to internal parts can be caused in a long time.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the wind driven generator has the forward overload protection function, the reverse impact protection function, different slipping torque levels in the forward direction and the reverse direction and the protection function.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a wind driven generator, includes the shell body, it is provided with the blade to rotate on the shell body, be equipped with the gear box in the shell body, the input of gear box with the transmission is connected between the blade, the output transmission of gear box is connected with generating set, generating set with be equipped with two-way asymmetric torque limiter that skids between the output of gear box, when blade corotation, the symmetry is skidded the torque limiter and is played overload protection effect to generating set, when producing the reverse shock between generating set and the gear box, two-way asymmetric torque limiter that skids realizes the idle running and skids. The bidirectional asymmetric slip torque limiter is arranged between the generator set and the gear box, when the blades rotate forwards, the torque is transmitted between the gear box and the generator set through the bidirectional asymmetric slip torque limiter, when the blades are overloaded, the bidirectional asymmetric slip torque limiter slips to realize power disconnection between the gear box and the generator set, and when reverse impact is generated between the generator set and the gear box, the bidirectional asymmetric slip torque limiter realizes idle slip, namely, the power disconnection between the gear box and the generator set is realized.

The bidirectional asymmetric slip torque limiter comprises an input sleeve fixedly connected with the output end of the gear box, an input shaft and a connecting cylinder, wherein the input shaft is arranged at one end of the connecting cylinder in an axial sliding manner, a first limiting mechanism used for limiting the radial displacement of the connecting cylinder is arranged on the input shaft, a first spring is arranged in the connecting cylinder and between the input shaft and the input shaft, the input sleeve is arranged between the input shaft and the connecting cylinder, the contact surface of the input sleeve and the input shaft and the contact surface of the input sleeve and the connecting cylinder are in friction connection, a backstop is fixedly connected between the input sleeve and the input shaft, one end, away from the first spring, of the connecting cylinder is provided with an output shaft in an axial sliding manner, a second limiting mechanism used for limiting the radial displacement of the connecting cylinder is arranged on the output shaft, a second spring is arranged in the connecting cylinder and between the output shaft, an output sleeve is arranged between the connecting cylinder and the output shaft, the contact surface of the output sleeve and the output shaft and the contact surface of the output sleeve and the connecting cylinder are in friction connection, and the output sleeve is fixedly connected with one end of the coupler.

Firstly, the torsion of the friction connection between the contact surfaces of the input sleeve and the input shaft and the torsion of the friction connection between the contact surfaces of the input sleeve and the connecting cylinder can be set to be a small point, the torsion of the friction connection between the contact surfaces of the output sleeve and the output shaft and the torsion of the friction connection between the contact surfaces of the output sleeve and the connecting cylinder can be set to be a large point, the torsion on the input shaft and the torsion on the output shaft are unequal, the power is input through the blades and drives the gear box, the output end of the gear box drives the input sleeve, at the moment, the torsion is in a normal range, and because the backstop is arranged between the input shaft and the input sleeve, the backstop drives the input shaft to rotate together, so that the connecting cylinder rotates along with the input shaft, meanwhile, an output shaft at the other end of the connecting cylinder is driven to rotate, the output shaft drives the output sleeve to rotate, so that power is transmitted to a generator set through a coupler, reverse torque exists in a transmission system of the wind driven generator, the torque of reverse impact is far insufficient to overcome the torque between the output sleeve and the output shaft, the torque of reverse impact is transmitted to the output shaft through the output sleeve, then the output shaft transmits the torque to the connecting cylinder, the connecting cylinder transmits the torque of reverse impact to the input shaft, and the friction force set among the input shaft, the input sleeve and the connecting cylinder is smaller than the torque of reverse impact, so that the input sleeve overcomes the friction force among the input shaft and the connecting cylinder, and is disengaged from idling; meanwhile, when the input torque force of the blade is too large, the backstop is arranged between the input shaft and the input sleeve, the backstop enables the input sleeve to only slip in one direction and lock in the other direction, the input sleeve transmits the torque force to the input shaft, the input shaft transmits the torque force to the connecting cylinder, the connecting cylinder transmits the torque force to the output shaft, and the friction force set among the output sleeve, the output shaft and the connecting cylinder is smaller than the input torque force, so that the output sleeve is disengaged at the moment, and no power is input to the generator set; when the blades rotate reversely, the backstop is arranged between the input shaft and the input sleeve, the backstop enables the input sleeve to only slip in one direction and be locked in the other direction, and meanwhile, the torque force of the friction connection between the contact surfaces of the input sleeve and the input shaft and the torque force of the friction connection between the contact surfaces of the input sleeve and the connecting cylinder are set to be a little bit, so that the input sleeve is directly enabled to overcome the friction force to be disengaged from the connecting cylinder for idling.

In order to realize the radial limiting of the input shaft, the first limiting mechanism further comprises a first spline groove arranged on the input shaft, first spline teeth matched with each other are arranged on the connecting cylinder, and the first spline groove is arranged on the first spline teeth. Through the cooperation of first spline groove on the input shaft and the first spline tooth on the connecting cylinder, can satisfy the input shaft displacement of small amplitude on the connecting cylinder, can have radial limiting displacement again, prevent relative rotation between input shaft and the connecting cylinder.

In order to realize radial limiting of the output shaft, the second limiting mechanism comprises a second spline groove arranged on the output shaft, a second spline tooth matched with the second spline tooth is arranged on the connecting cylinder, and the second spline groove is arranged on the second spline tooth. Through the cooperation of second spline groove on the output shaft and the connecting cylinder on the second spline tooth, can satisfy output shaft small amplitude displacement on the connecting cylinder, can have radial limiting displacement again, prevent relative rotation between output shaft and the connecting cylinder.

In order to facilitate the installation and maintenance of the first spring and the second spring, the connecting cylinder is formed by mutually splicing a first flange plate, a cylinder and a second flange plate, the first flange plate is arranged at one end of the cylinder, and the second flange plate is arranged at the other end of the cylinder. Through dividing into first ring flange, drum and second ring flange with the connecting cylinder, make things convenient for the installation of first spring between input shaft and the connecting cylinder, also make things convenient for the installation and the maintenance of second spring between output shaft and the connecting cylinder simultaneously.

In order to realize the friction connection among the input shaft, the input sleeve and the connecting cylinder, friction plates are further arranged between contact surfaces of the input sleeve and the input shaft and between contact surfaces of the input sleeve and the connecting cylinder. Through set up the friction disc on the contact surface between input shaft, input sleeve and connecting cylinder to realize when torsion is greater than frictional force between input shaft, input sleeve and the connecting cylinder, can make the input sleeve throw off, play the safety protection effect.

In order to realize the friction connection among the output shaft, the output sleeve and the connecting cylinder, friction plates are further arranged between contact surfaces of the output sleeve and the output shaft and between contact surfaces of the output sleeve and the connecting cylinder. Through set up the friction disc on the contact surface between output shaft, output sleeve and connecting cylinder to when the realization is greater than the frictional force between output shaft, output sleeve and the connecting cylinder, can make the output sleeve throw off, play the safety protection effect.

In order to facilitate installation and maintenance of the backstop, further, the inner ring of the backstop is fixedly connected with the input shaft through a flat key, and the outer ring of the backstop is fixedly connected with the input sleeve through a flat key. The backstop is fixed between the input shaft and the input sleeve in a flat key connection mode, and the input sleeve is simple in structure, convenient to install and convenient to maintain.

Preferably, the first spring and the second spring are both belleville springs. The butterfly spring has high rigidity and strong buffering and vibration absorbing capacity, can bear large load with small deformation, and is suitable for occasions with small requirement on axial space.

The invention has the beneficial effects that: when the wind driven generator is used, a bidirectional slip torque limiter is connected with a unidirectional slip torque limiter in series, the torque limiter limits the torque transmitted by a transmission system in a slip mode, and the connection is automatically recovered after the overload condition disappears. The bidirectional slip torque limiter sets a high slip torque to ensure normal operation of the equipment and avoid large forward impact, and the unidirectional slip torque limiter sets a low slip torque to weaken reverse impact on the equipment during normal operation. The invention not only has the forward overload protection function, but also has the reverse overload protection function, and simultaneously has different levels of slip torque in the forward direction and the reverse direction, and plays a role in protection. Therefore, the bidirectional asymmetric slip protection device realizes bidirectional asymmetric slip protection, further weakens reverse impact between the generator set and the gear box while providing forward overload protection, plays a role in protecting equipment such as the gear box and the like, and has a shock absorption or damping effect.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a front view of a wind turbine of the present invention;

FIG. 2 is a front view of a bi-directional asymmetric slip torque limiter in a wind turbine of the present invention;

FIG. 3 is a left side view of the bi-directional asymmetric slip torque limiter in the wind turbine of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 2;

fig. 5 is a sectional view taken along line B-B of fig. 2.

In the figure: 1. the device comprises an outer shell, 2, blades, 3, a gear box, 4, a coupler, 5, a generator set, 6, an input sleeve, 7, an input shaft, 8, a first spring, 9, an output sleeve, 10, an output shaft, 11, a second spring, 12, a connecting cylinder, 13, a first flange plate, 14, a cylinder, 15, a second flange plate, 16, a backstop, 17, a friction plate, 18, a flat key, 19 and a bidirectional asymmetric slip torque limiter.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

Examples

As shown in fig. 1-5, a wind driven generator comprises an outer shell 1, the outer shell 1 is provided with blades 2 in a rotating manner, the outer shell 1 is internally provided with a gear box 3, the input end of the gear box 3 is in transmission connection with the blades 2, the output end of the gear box 3 is in transmission connection with a generator set 5, a bidirectional asymmetric slip torque limiter 19 is arranged between the generator set 5 and the output end of the gear box 3, when the blades 2 rotate forwards, the symmetric slip torque limiter 19 plays an overload protection role for the generator set 5, and when reverse impact is generated between the generator set 5 and the gear box 3, the bidirectional asymmetric slip torque limiter realizes idle slip.

The bidirectional asymmetric slip torque limiter 19 comprises an input sleeve 6 fixedly connected with the output end of the gear box 3, an input shaft 7 and a connecting cylinder 12, the input shaft 7 is arranged at one end of the connecting cylinder 12 in an axial sliding mode, a first limiting mechanism used for limiting radial displacement of the connecting cylinder 12 is arranged on the input shaft 7, a first spring 8 is arranged in the connecting cylinder 12 and between the input shaft 7, the input sleeve 6 is located between the input shaft 7 and the connecting cylinder 12, the contact surface between the input sleeve 6 and the input shaft 7 and the contact surface between the input sleeve 6 and the connecting cylinder 12 are in friction connection, a backstop 16 is fixedly connected between the input sleeve 6 and the input shaft 7, an output shaft 10 is arranged at one end, far away from the first spring 8, of the connecting cylinder 12 in an axial sliding mode, a second limiting mechanism used for limiting radial displacement of the connecting cylinder 12 is arranged on the output shaft 10, a second spring 11 is arranged in the connecting cylinder 12 and between the output shaft 10, an output sleeve 9 is arranged between the connecting cylinder 12 and the output shaft 10, and the contact surface between the output sleeve 9 and the connecting cylinder 12 are both friction coupling 4.

The first limiting mechanism comprises a first spline groove formed in the input shaft 7, first spline teeth matched with the first spline groove are arranged on the connecting cylinder 12, and the first spline groove is formed in the first spline teeth.

The second limiting mechanism comprises a second spline groove formed in the output shaft 10, second spline teeth matched with the second spline groove are arranged on the connecting cylinder 12, and the second spline groove is formed in the second spline teeth.

The connecting cylinder 12 is formed by mutually splicing a first flange 13, a cylinder 14 and a second flange 15, wherein the first flange 13 is arranged at one end of the cylinder 14, and the second flange 15 is arranged at the other end of the cylinder 14. The first flange 13, the cylinder 14 and the second flange 15 are fixedly connected by bolts.

Friction plates 17 are provided between contact surfaces of the input sleeve 6 and the input shaft 7 and between contact surfaces of the input sleeve 6 and the connecting cylinder 12.

Friction plates 17 are arranged between the contact surfaces of the output sleeve 9 and the output shaft 10 and between the contact surfaces of the output sleeve and the connecting cylinder 12.

The inner ring of the backstop 16 is fixedly connected with the input shaft 7 through a flat key 18, and the outer ring of the backstop 16 is also fixedly connected with the input sleeve 6 through the flat key 18.

The first spring 8 and the second spring 11 are both belleville springs.

When the wind driven generator is in use, one end of an input sleeve 6 is fixedly connected with an output shaft 10 of a gear box 3, an output sleeve 9 is fixedly connected with a coupler 4, the coupler 4 is fixedly connected with an input end of a generator set 5, the gear box 3 is driven by blades 2, the gear box 3 transmits power to the input sleeve 6, the power is transmitted to an input shaft 7 through the input sleeve 6 and a backstop 16 on the input shaft 7, the input shaft 7 is transmitted to a first flange 13, the first flange 13 passes through a cylinder 14 and reaches a second flange 15, the second flange 15 transmits the power to the output shaft 10, the output shaft 10 is transmitted to the output sleeve 9, and finally the output sleeve 9 is transmitted to the coupler 4 and drives the generator set 5 to rotate, so that the generator set 5 generates electricity; the slip torque force among the input shaft 7, the input sleeve 6 and the first flange 13 is smaller than the slip torque force among the output shaft 10, the output sleeve 9 and the second flange 15, and meanwhile when the torque force transmitted by the blade 2 is larger than the slip torque force among the second flange 15, the output shaft 10 and the output sleeve 9, the static friction between the output sleeve 9 and the friction plate 17 is changed into dynamic friction, so that the disengagement of the output sleeve 9 is realized, and the safety protection effect is achieved; the torsion driven by the blade 2 is not greater than the slipping torsion among the second flange 15, the output shaft 10 and the output sleeve 9, when the generator set 5 generates reverse impact, the output sleeve 9 reversely transmits the torsion, because the reverse impact torsion is far smaller than the slipping torsion of the output sleeve 9 and is not enough to overcome the slipping torsion of the output sleeve 9, the reverse impact torsion is transmitted to the second flange 15, the first flange 13 is reached through the cylinder 14, the first flange 13 is transmitted to the input shaft 7, and the reverse impact torsion is greater than the slipping torsion among the input shaft 7, the input sleeve 6 and the first flange 13 at the moment, so that the input sleeve 6 is disengaged, the reverse impact torsion cannot be transmitted to the gear box 3, and the effect of protecting the gear box 3 is achieved; when the blades 2 rotate reversely, the backstop 16 enables the input sleeve 6 to slip in one direction only and lock in the other direction, the torque of the input sleeve 6 is far greater than the slip torque among the input shaft 7, the input sleeve 6 and the first flange plate 13, the static friction between the input sleeve 6 and the friction plate 17 is changed into dynamic friction, the input sleeve 6 is directly separated, the power cannot be transmitted to the generator set 5, and the effect of protecting the generator set 5 is achieved.

In light of the foregoing description of the preferred embodiment of the present invention, it is intended that the appended claims be interpreted as including all such alterations and modifications as fall within the true spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A wind driven generator comprises an outer shell (1), wherein blades (2) are arranged on the outer shell (1) in a rotating mode, and the wind driven generator is characterized in that: the anti-skidding type wind power generation device is characterized in that a gear box (3) is arranged in the outer shell (1), the input end of the gear box (3) is in transmission connection with the blades (2), the output end of the gear box (3) is in transmission connection with a generator set (5), a bidirectional asymmetric skidding torque limiter (19) is arranged between the generator set (5) and the output end of the gear box (3), when the blades (2) rotate forwards, the bidirectional asymmetric skidding torque limiter (19) plays an overload protection role on the generator set (5), and when reverse impact is generated between the generator set (5) and the gear box (3), the bidirectional asymmetric skidding torque limiter (19) realizes idling skidding;

the bidirectional asymmetric slip torque limiter comprises an input sleeve (6) fixedly connected with the output end of the gear box (3), an input shaft (7) and a connecting cylinder (12), wherein the input shaft (7) is arranged at one end of the connecting cylinder (12) along the axial sliding direction of the input shaft, a first limiting mechanism used for limiting the radial displacement of the connecting cylinder (12) is arranged on the input shaft (7), a first spring (8) is arranged in the connecting cylinder (12) and between the input shaft (7), the input sleeve (6) is arranged between the input shaft (7) and the connecting cylinder (12), an output shaft (10) is arranged at one end, far away from the first spring (8), of the connecting cylinder (12) along the axial sliding direction of the input sleeve (6) and the connecting cylinder (12), the output shaft (10) is arranged on the output shaft (10), a backstop (16) is fixedly connected between the input sleeve (6) and the input shaft (7), a second limiting mechanism (11) is arranged between the output shaft (12) and the output shaft (12), the contact surface of the output sleeve (9) and the output shaft (10) and the contact surface of the output sleeve (9) and the connecting cylinder (12) are in friction connection, and the output sleeve (9) is fixedly connected with one end of the coupler (4).

2. Wind generator according to claim 1, characterized in that: the first limiting mechanism comprises a first spline groove arranged on the input shaft (7), first spline teeth matched with each other are arranged on the connecting cylinder (12), and the first spline groove is arranged on the first spline teeth.

3. Wind generator according to claim 1, characterized in that: the second limiting mechanism comprises a second spline groove arranged on the output shaft (10), a second spline tooth matched with the second spline groove is arranged on the connecting cylinder (12), and the second spline groove is arranged on the second spline tooth.

4. The wind generator of claim 1, wherein: the connecting cylinder (12) is formed by mutually splicing a first flange plate (13), a cylinder (14) and a second flange plate (15), wherein the first flange plate (13) is arranged at one end of the cylinder (14), and the second flange plate (15) is arranged at the other end of the cylinder (14).

5. The wind generator of claim 1, wherein: and friction plates (17) are arranged between the contact surfaces of the input sleeve (6) and the input shaft (7) and between the contact surfaces of the input sleeve (6) and the connecting cylinder (12).

6. Wind generator according to claim 1, characterized in that: friction plates (17) are arranged between contact surfaces of the output sleeve (9) and the output shaft (10) and between contact surfaces of the output sleeve and the connecting cylinder (12).

7. The wind generator of claim 1, wherein: the inner ring of the backstop (16) is fixedly connected with the input shaft (7) through a flat key (18), and the outer ring of the backstop (16) is fixedly connected with the input sleeve (6) through the flat key (18).

8. Wind generator according to claim 1, characterized in that: the first spring (8) and the second spring (11) are both belleville springs.