Transmission device and wind power gear box

Abstract

The utility model belongs to the technical field of wind power gear boxes, and discloses a transmission device and a wind power gear box, the transmission device comprises a shaft body, an inner ring part, a plurality of rolling bodies and an outer ring part, the inner ring part is annularly arranged on the shaft body, the inner ring part and the shaft body are integrally formed, and an inner raceway groove is annularly formed in the inner ring part; the inner ring portion is sleeved with the outer ring portion, the outer ring portion is provided with an outer raceway groove right opposite to the inner raceway groove, a rolling channel is formed between the inner raceway groove and the outer raceway groove, the rolling body is arranged in the rolling channel in a rolling mode, and the inner ring portion and the shaft body of the transmission device are of an integrated structure, so that the connection strength of the inner ring portion and the shaft body is greatly enhanced. The condition that the shaft body slips relative to the inner ring part in the transmission process can be effectively avoided, so that the transmission reliability and stability of the shaft body are improved; the wind power gear box comprises a box body, a planet carrier and the transmission device, relative sliding of the gear box in the transmission process can be effectively avoided, and therefore the transmission efficiency and the transmission stability of the wind power gear box are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power gear box technical field especially relates to a transmission device and wind power gear box. BACKGROUND

[0002] In wind power generation system, gear box is one of the key components, the gear box of wind driven generator generally contains planetary transmission mechanism at present, the sun wheel of planetary transmission mechanism is engaged with the spline shaft, thereby realizing transmission through the spline shaft, in order to guarantee the assembly stability of spline shaft, bearing is arranged between spline shaft and box, bearing guarantees the rotation cooperation of spline shaft and box while supporting spline shaft.

[0003] The bearing often appears the situation of slipping between its inner ring and spline shaft in the operation process, the existing solution is mostly to increase the interference amount between bearing inner ring and spline shaft, but too much interference amount will cause that assembly stress is too high, will seriously affect the life of gear box, and will lead to difficult assembly and disassembly.

[0004] Therefore, it is urgent to design a transmission device to solve the above problems existing in the prior art. UTILITY MODEL CONTENTS

[0005] The utility model discloses a transmission device and wind power gear box can prevent the situation of slipping in the transmission process to improve transmission efficiency and transmission stability.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] Transmission device, comprising:

[0008] Shaft body;

[0009] Inner ring portion, the inner ring portion is annular and is set to the shaft body and is integrally formed with the shaft body, and the outer circumferential surface of the inner ring portion is annular and is provided with inner raceway groove;

[0010] Outer ring portion, the outer ring portion is sleeved on the outer side of the inner ring portion, the inner circumferential surface of the outer ring portion is provided with outer raceway groove opposite the inner raceway groove, and the inner raceway groove and the outer raceway groove form rolling channel;

[0011] A plurality of rolling bodies, the rolling body is rolled and set in the rolling channel.

[0012] As preferably, the transmission device further includes a retainer, the retainer is arranged between the outer ring portion and the inner ring portion, a plurality of accommodation cavities are uniformly arranged on the retainer along the circumference, and the rolling body is rolled and arranged in the accommodation cavity.

[0013] Preferably, the transmission device further comprises a gear, and the shaft body is provided with a shaft shoulder, and the outer ring portion and the gear are distributed on both sides of the shaft shoulder.

[0014] Preferably, the transmission device further comprises a sun gear, the sun gear is arranged in the shaft body and is in engagement with the shaft body, and the shaft body is in abutment with the sun gear in the axial direction.

[0015] Preferably, the shaft body is provided with a lubricating oil passage, one end of the lubricating oil passage is communicated with an oil inlet of the planet carrier, and the other end of the lubricating oil passage is communicated with the inner raceway groove.

[0016] The wind power gear box comprises a box body, a planet carrier and the transmission device, the transmission device is arranged in the box body, the outer ring portion is in interference fit with the box body, and the planet gears on the planet carrier are in rotational fit with the shaft body.

[0017] Preferably, the box body is provided with a rotation-stopping pin, the outer ring portion is provided with a rotation-stopping groove, and the rotation-stopping pin is inserted into the rotation-stopping groove.

[0018] Preferably, a plurality of rotation-stopping pins are arranged, the rotation-stopping pins are arranged uniformly at intervals, and a plurality of rotation-stopping grooves are arranged in correspondence with the rotation-stopping pins.

[0019] Preferably, the wind power gear box further comprises a limiting plate, the limiting plate is arranged in the box body, and the limiting plate is in abutment with the outer ring portion in the axial direction of the shaft body.

[0020] Preferably, the limiting plate is provided with a plurality of limiting plates in the circumferential direction of the outer ring portion.

[0021] The wind power gear box has the advantages that:

[0022] The transmission device comprises a shaft body, an inner ring portion, a plurality of rolling bodies and an outer ring portion, the outer ring portion is sleeved on the inner ring portion, the inner circumferential surface of the outer ring portion is annularly provided with an inner raceway groove, the outer circumferential surface of the inner ring portion is annularly provided with an outer raceway groove, the inner raceway groove and the outer raceway groove are oppositely arranged to form a rolling channel, and the rolling bodies are arranged in the rolling channel in a rolling manner, so that the inner ring portion, the rolling bodies and the outer ring portion form a complete bearing structure, and the inner ring portion and the outer ring portion can relatively rotate through the rolling bodies.

[0023] The wind power gear shaft provided by the utility model, comprising a box body, a planet carrier and the transmission device, the transmission device is arranged in the box body, the planet wheel on the planet carrier is in rotational cooperation with the shaft body of the transmission device, since the shaft body and the inner ring part are integrally formed, the wind power gear box can effectively prevent the occurrence of skidding phenomenon in the transmission process, and the transmission efficiency and transmission stability of the wind power gear box are improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structural schematic view of the transmission device cooperating with the sun gear provided by the utility model specific embodiment.

[0025] In the drawings:

[0026] 100 - oil inlet;

[0027] 200 - slip ring;

[0028] 1 - shaft body; 11 - shaft shoulder; 12 - lubricating oil path;

[0029] 2 - inner ring part;

[0030] 3 - outer ring part;

[0031] 4 - rolling body;

[0032] 5 - gear;

[0033] 6 - sun gear; 61 - resisting part;

[0034] 7 - box body; 71 - rotation stopping pin;

[0035] 8 - limiting plate. DETAILED DESCRIPTION

[0036] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0037] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or only indicates that horizontal height of first feature is higher than second feature. First feature "under", "below" and "under surface" of second feature includes that first feature is directly below and obliquely below second feature, or only indicates that horizontal height of first feature is less than second feature.

[0039] In the description of the embodiment, the terms "upper", "lower", "right", "left" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0040] As shown in Figure 1 The utility model provides a transmission device, this transmission device includes shaft body 1, inner ring part 2, outer ring part 3 and a plurality of rolling body 4, inner ring part 2 ring is equipped in shaft body 1 and is integrally formed with shaft body 1, and the outer circumferential surface of inner ring part 2 is equipped with inner raceway groove, outer ring part 3 is equipped on the outside of inner ring part 2, and the inner circumferential surface of outer ring part 3 is provided with outer raceway groove opposite inner raceway groove, and rolling passage is formed between inner raceway groove and outer raceway groove, and rolling body 4 is arranged in rolling passage.

[0041] Because outer ring part 3 is equipped with inner raceway groove, inner ring part 2 is equipped with outer raceway groove, inner raceway groove and outer raceway groove are opposite and form rolling passage, and rolling body 4 is arranged in rolling passage, therefore, inner ring part 2, rolling body 4 and outer ring part 3 form complete bearing structure, and inner ring part 2 and outer ring part 3 can relatively rotate through rolling body 4, and because inner ring part 2 is equipped in shaft body 1 and is integrally formed with shaft body 1, therefore, inner ring part 2 and shaft body 1 are integrated structure, greatly enhance the connection strength of inner ring part 2 and shaft body 1, can effectively avoid the slippage of shaft body 1 and inner ring part 2 during transmission, and further improve the reliability and stability of shaft body 1 transmission.

[0042] The rolling body 4 can be a cylindrical roller, a conical roller or a spherical ball, and the transmission device can be selected according to specific application scenarios and functions. Exemplarily, the bearing structure is a cylindrical roller bearing, and the rolling body 4 is a cylindrical roller. The bearing structure can bear large axial and radial loads. The inner raceway groove of the inner ring part 2 is hardened by induction quenching, which greatly improves the durability and reliability of the transmission device. The shaft body 1 is a cylindrical workpiece for transmission, which can be a spline shaft or a smooth shaft, as long as the shaft body 1 can be reliably connected to other workpieces and transmit torque. Exemplarily, the shaft body 1 is a spline shaft with internal splines.

[0043] To improve the stability of the transmission device and further improve the smoothness of the rolling body 4 in the rolling channel, the transmission device further comprises a retainer arranged between the outer ring part 3 and the inner ring part 2. The retainer is uniformly provided with a plurality of accommodation cavities in the circumferential direction, and the rolling body 4 is arranged in the accommodation cavity.

[0044] Further, as shown in Figure 1 The transmission device further comprises a gear 5, and the shaft body 1 is provided with a shaft shoulder 11. The outer ring part 3 and the gear 5 are distributed on both sides of the shaft shoulder 11. The shaft shoulder 11 can limit the outer ring part 3 and the gear 5 in the axial direction. The gear 5 is connected to the shaft body 1 in interference. The gear 5 is used to output torque to the outside. When the shaft body 1 rotates, it drives the gear 5 to rotate, thereby realizing the torque output of the transmission device.

[0045] Further, as shown in Figure 1 The transmission device further comprises a sun gear 6, which is arranged in the shaft body 1 and is engaged with the shaft body 1. The shaft body 1 abuts against the sun gear 6 in the axial direction. The sun gear 6 is used to engage with the planet gears on the planet carrier, so as to realize the transmission of torque between the planet carrier and the shaft body 1. Specifically, the sun gear 6 is provided with a resisting portion 61, and the end surface of the shaft body 1 abuts against the resisting portion 61 in the axial direction. The resisting portion 61 limits the shaft body 1.

[0046] Further, as shown in Figure 1 The shaft body 1 is provided with a lubricating oil channel 12. One end of the lubricating oil channel 12 is communicated with an oil inlet 100 of the planet carrier, and the other end of the lubricating oil channel 12 is communicated with the inner raceway groove. The lubricating oil can flow from the oil inlet 100 to the inner raceway groove through the lubricating oil channel 12, thereby lubricating the rolling body 4 in the rolling channel, ensuring smooth operation of the transmission device. At the same time, since the lubricating oil channel 12 is communicated with the inner raceway groove, the lubricating oil can flow between the adjacent two rolling bodies 4, avoiding the lubricating oil flowing to the end surface of the rolling body 4 in the axial direction, thereby greatly improving the efficiency and reliability of lubrication.

[0047] As shown in Figure 1As shown, the embodiment also provides a wind power gear box, which comprises a box body 7, a planet carrier and the transmission device described above, the transmission device and the planet carrier are arranged in the box body 7, the outer ring part 3 is in interference fit with the box body 7, and the planet wheel on the planet carrier is in rotational fit with the shaft body 1.

[0048] Since the planet wheel on the planet carrier is in rotational fit with the shaft body 1 of the transmission device, the wind power gear box can realize normal power output through the rotational fit of the planet wheel and the transmission device; since the inner ring part 2 of the transmission device is integrally formed with the shaft body 1, the problem of slippage between the bearing inner ring and the shaft body 1 is solved, the reliability and transmission efficiency of the operation of the wind power gear box are improved, and since the inner ring part 2 and the shaft body 1 are an integral structure, it is not necessary to arrange an inner ring stop ring on the shaft body 1, thereby saving the axial space of the wind power gear box and shortening the axial length of the wind power gear box under the condition that the bearing specification remains unchanged; if the axial size of the wind power gear box remains unchanged, there is a larger axial space to accommodate a larger specification of the rolling body 4 and the outer ring part 3, so as to improve the load carrying reliability of the transmission device.

[0049] Specifically, the planet wheel on the planet carrier is in mesh with the sun gear 6 of the transmission device, the sun gear 6 drives the shaft body 1 to rotate, thereby realizing the transmission of torque.

[0050] In order to prevent the outer ring part 3 from sliding relative to the inner wall of the box body 7 and affecting the transmission performance of the transmission device, as shown, Figure 1 As shown, the box body 7 is provided with a rotation stop pin 71, the outer ring part 3 is provided with a rotation stop groove, the rotation stop pin 71 is inserted into the rotation stop groove, and the rotation stop pin 71 is in limiting fit with the rotation stop groove, thereby effectively solving the problem of slippage between the outer ring part 3 and the box body 7.

[0051] Specifically, the rotation stop groove is provided with a plurality of rotation stop grooves along the circumference of the outer ring part 3, and the box body 7 is also provided with a plurality of rotation stop pins 71, the rotation stop pins 71 are inserted into the rotation stop grooves one by one, thereby ensuring the stability of the outer ring part 3 along the circumference; specifically, the plurality of rotation stop grooves are uniformly arranged, which can effectively avoid damage to the outer ring part 3 caused by stress concentration.

[0052] Specifically, the lubricating oil channel 12 is distributed along the circumference of the shaft body 1 at intervals, the lubricating oil channel 12 comprises a first flow channel extending along the axial direction, a second flow channel extending along the radial direction and a third flow channel extending along the axial direction, the first flow channel, the second flow channel and the third flow channel are sequentially communicated, and the first flow channel is communicated with the oil inlet 100 of the planetary transmission mechanism through the slip ring 200, and the third flow channel is communicated with the inner raceway groove; it can be understood that the first flow channel can be intermittently communicated with the oil inlet 100 during the rotation of the transmission device, thereby realizing intermittent oil supply to the rolling body 4.

[0053] In order to ensure the stability of the transmission device and the sun gear 6, prevent the transmission device from moving along the axial direction, as shown in Figure 1 The wind power gear box further comprises a limiting plate 8, the limiting plate 8 is arranged on the box body 7, and the limiting plate 8 abuts against the outer ring part 3 along the axial direction of the sun gear 6; specifically, the sun gear 6 is provided with a resisting part 61, the shaft body 1 is sleeved on the sun gear 6 and abuts against the resisting part 61 along the end face in the axial direction, the limiting plate 8 is detachably connected to the box body 7 through bolts, the limiting plate 8 abuts against the outer ring part 3 of the transmission device, the limiting plate 8 and the resisting part 61 are matched, so that the limiting of the transmission device along the axial direction is realized.

[0054] Specifically, the limiting plate 8 is provided with a plurality of limiting plates 8 along the circumference of the outer ring part 3, the plurality of limiting plates 8 are uniformly arranged along the circumference of the outer ring part 3, so that the stability and reliability of the limiting of the transmission device are improved; when the transmission device needs to be repaired or replaced, the worker unscrews the bolts of the limiting plate 8, and then the transmission device can be taken off from the planetary transmission mechanism, so that the operation is simple, time-saving and labor-saving.

[0055] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, all the embodiments need not to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. Transmission, characterized in that The transmission device comprises: a shaft body (1); an inner ring part (2) annularly arranged on the shaft body (1) and integrally formed with the shaft body (1), an inner raceway groove being annularly arranged on an outer circumferential surface of the inner ring part (2); an outer ring part (3) sleeved on an outer side of the inner ring part (2), an outer raceway groove being arranged on an inner circumferential surface of the outer ring part (3) opposite to the inner raceway groove, a rolling channel being formed between the inner raceway groove and the outer raceway groove; a plurality of rolling bodies (4) rolling arranged in the rolling channel.

2. The transmission of claim 1, wherein The transmission device further comprises a retainer arranged between the outer ring part (3) and the inner ring part (2), a plurality of accommodating cavities being uniformly arranged on the retainer in a circumferential direction, the rolling bodies (4) rolling arranged in the accommodating cavities.

3. The transmission of claim 1, wherein The transmission device further comprises a gear (5), an axle shoulder (11) being arranged on the shaft body (1), the outer ring part (3) and the gear (5) being distributed on two sides of the axle shoulder (11).

4. The transmission of claim 1, wherein The transmission device further comprises a sun gear (6) penetrating the shaft body (1) and engaged with the shaft body (1), the shaft body (1) abutting the sun gear (6) in an axial direction.

5. The transmission of claim 1, wherein A lubricating oil passage (12) is arranged on the shaft body (1), one end of the lubricating oil passage (12) being communicated with an oil inlet (100) of a planet carrier, the other end of the lubricating oil passage (12) being communicated with the inner raceway groove.

6. A wind turbine gearbox, characterised in that The wind power gear box comprises a box body (7), a planet carrier and the transmission device according to any one of claims 1-5, the transmission device and the planet carrier being arranged in the box body (7), the outer ring part (3) being in interference fit with the box body (7), the planet wheels on the planet carrier being in rotational fit with the shaft body (1).

7. A wind turbine gearbox according to claim 6, characterised in that A rotation stopping pin (71) is arranged on the box body (7), a rotation stopping groove being arranged on the outer ring part (3), the rotation stopping pin (71) being inserted into the rotation stopping groove.

8. A wind power gear box according to claim 7, characterised in that A plurality of rotation stopping pins (71) are arranged, the rotation stopping pins (71) being uniformly spaced, a plurality of rotation stopping grooves corresponding to the rotation stopping pins (71) also being arranged.

9. The wind turbine gearbox of claim 6, wherein, The wind power gear box further comprises a limiting plate (8) arranged on the box body (7), the limiting plate (8) abutting the outer ring part (3) in an axial direction of the shaft body (1).

10. A wind turbine gearbox according to claim 9, characterised in that The limiting plate (8) is provided with a plurality of limiting plates (8) along a circumferential direction of the outer ring part (3).

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