CN222141789U - Bearing assemblies, shafting and wind turbines - Google Patents

Abstract

The disclosure provides a bearing assembly, a shafting and a wind generating set, wherein the bearing assembly is suitable for the wind generating set and comprises a bearing seat, a first bearing and a second bearing, the bearing seat is provided with a rotating shaft mounting hole for a rotating shaft to pass through, the first bearing and the second bearing are arranged between the rotating shaft and the bearing seat, the first bearing and the second bearing are adjacently arranged along the axial direction of the rotating shaft, the first bearing can bear radial load and axial load, the second bearing can bear radial load, the bearing assembly is arranged in such a way that the size of a single bearing is not required to be increased, the bearing capacity of the bearing assembly is improved, and the cost of the bearing assembly is reduced.

Description

Bearing assembly, shafting and wind generating set

Technical Field

The disclosure belongs to the technical field of wind power generation, and particularly relates to a bearing assembly, a shafting and a wind generating set.

Background

The current wind generating set shows remarkable large development trend, and the gravity and pneumatic load of the whole wind generating set are continuously increased. In order to meet the requirements of bearing and fatigue performance, the size of the bearing is continuously increased, on one hand, the cost of the bearing is increased, and on the other hand, the size of the shaft and the bearing seat assembled with the bearing is correspondingly increased, and further cost is increased.

Disclosure of utility model

The main object of the present disclosure is to provide a bearing assembly, a shafting and a wind generating set, so as to improve the bearing capacity of the bearing assembly.

Aiming at the purposes, the present disclosure provides the following technical scheme:

The first aspect of the disclosure provides a bearing assembly suitable for a wind generating set, the bearing assembly comprises a bearing seat, a first bearing and a second bearing, the bearing seat is provided with a rotating shaft mounting hole for a rotating shaft to pass through, the first bearing and the second bearing are arranged between the rotating shaft and the bearing seat, the first bearing and the second bearing are adjacently arranged along the axial direction of the rotating shaft, the first bearing can bear radial load and axial load, and the second bearing can bear radial load.

According to the first exemplary embodiment of the disclosure, the rotating shaft is a main shaft of the wind generating set, the wind generating set further comprises a hub and a generator, a first end of the main shaft is connected to the hub, a second end of the main shaft is connected to a rotor of the generator, a first bearing and a second bearing are located at the first end of the main shaft, and the first bearing is arranged close to the hub relative to the second bearing.

Optionally, the first bearing comprises a first tapered roller bearing or a thrust ball bearing, and the second bearing comprises a cylindrical roller bearing or a radial ball bearing.

Specifically, the first bearing includes a first tapered roller bearing or a thrust ball bearing, and the second bearing includes a cylindrical roller bearing or a radial ball bearing.

Further, the stepped shaft comprises a first shaft shoulder and a second shaft shoulder which are arranged at intervals along the axial direction of the rotating shaft, the first shaft shoulder is arranged close to the hub relative to the second shaft shoulder, the radius of the first shaft shoulder is larger than that of the second shaft shoulder, a third shaft shoulder and a fourth shaft shoulder which are arranged at intervals along the axial direction of the rotating shaft are arranged in the rotating shaft mounting hole of the bearing seat, the third shaft shoulder is arranged close to the hub relative to the fourth shaft shoulder, the radius of the third shaft shoulder is larger than that of the fourth shaft shoulder, the first shaft shoulder is arranged on one side of the first bearing facing the hub, the first inner ring of the first bearing is abutted to the first shaft shoulder, the first outer ring of the first bearing is abutted to the third shaft shoulder, the second shaft shoulder is arranged on one side of the second bearing facing the first bearing, the second shaft shoulder is abutted to the second shaft shoulder, the second inner ring of the second bearing is abutted to the fourth shaft shoulder is arranged on one side of the second bearing.

According to another exemplary embodiment of the disclosure, the bearing assembly comprises a first spacer ring and a second spacer ring, the first spacer ring is sleeved on the rotating shaft and is located between the second shoulder and the second inner ring along the axial direction of the rotating shaft, the first spacer ring does not protrude out of the second shoulder along the radial direction of the rotating shaft, and the second spacer ring is sleeved on the rotating shaft and abuts against one side, away from the hub, of the second inner ring.

Optionally, the bearing assembly further comprises a third spacer, the third spacer is arranged at the radial outer side of the first spacer at intervals, and two axial ends of the third spacer are respectively propped against between the first outer ring of the first bearing and the second outer ring of the second bearing.

Specifically, the inner diameter of the third spacer is not smaller than the inner diameters of the first outer ring and the second outer ring.

Further, the bearing assembly further comprises a second tapered roller bearing disposed at the second end of the spindle, the first tapered roller bearing and the second tapered roller bearing being disposed face-to-face or back-to-back.

In a second aspect of the present disclosure, there is provided a shafting comprising a shaft and a bearing assembly as described above, the shaft being rotatably disposed in the shaft mounting hole, the first and second bearings being disposed between the shaft and the bearing housing, respectively.

In a third aspect of the present disclosure, a wind park is provided, comprising a shafting as described above.

The bearing assembly, the shafting and the wind generating set have the following distinguishing technical characteristics that the shafting comprises the first bearing and the second bearing, and the first bearing and the second bearing are adjacently arranged along the axial direction of the rotating shaft, so that the arrangement is realized, the size of a single bearing is not required to be increased, the bearing capacity of the bearing assembly is improved, and the cost of the bearing assembly is reduced.

Drawings

The foregoing and/or other objects and advantages of the disclosure will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a longitudinal cross-sectional view of a shafting provided in an exemplary embodiment of the present disclosure.

Fig. 2 is an enlarged view of a portion of the structure indicated by the I-ring in fig. 1.

Reference numerals illustrate:

10. 20, second bearing;

40. the first outer ring is arranged on the first outer ring;

2. a first inner ring, a second outer ring and a third inner ring;

4. The first space ring is arranged on the first inner ring;

6. The third space ring is arranged on the first space ring;

8. 81, a first shaft shoulder;

82. the second shoulder and the third shoulder are 41;

42. 30, a second tapered roller bearing;

9. An end cap.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the embodiments of the present disclosure should not be construed as limited to the embodiments set forth herein. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

In one aspect of the present disclosure, a bearing assembly is provided that is suitable for use in a wind turbine generator system. The fan generator set comprises a tower, an impeller and a generator, wherein the impeller and the generator are arranged at the top of the tower, and a shafting is connected between the generator and the impeller, and the shafting can transmit rotation of the impeller to a rotor of the generator so as to drive the generator to generate electricity.

Referring to fig. 1 and 2, an exemplary embodiment of the present disclosure, a shafting includes a rotating shaft 8 and a bearing assembly, wherein the bearing assembly includes a bearing housing 40, a first bearing 10 and a second bearing 20 disposed between the rotating shaft 8 and the bearing housing 40. The bearing housing 40 is provided with a shaft mounting hole through which the shaft 8 passes, and the shaft 8 is rotatably provided in the shaft mounting hole. The first bearing 10 and the second bearing 20 are disposed between the rotating shaft 8 and the bearing housing 40, and the first bearing 10 and the second bearing 20 are disposed adjacently along the axial direction of the rotating shaft 8, the first bearing 10 being capable of bearing radial load and axial load, and the second bearing 20 being capable of bearing radial load.

The bearing assembly of the present disclosure includes the first bearing 10 and the second bearing 20 disposed adjacent to each other in the axial direction of the rotation shaft 8 to share the pneumatic load, the gravitational load, and the inertial load of the main shaft, and the manufacturing cost of the bearing assembly of a larger size is significantly increased, without increasing the size of a single bearing, thereby reducing the manufacturing cost of the bearing assembly.

In the present embodiment, the first bearing 10 and the second bearing 20 are disposed adjacently, so that the first bearing 10 and the second bearing 20 can use the same bearing housing 40, and thus the bearing housing 40, the first bearing 10 and the second bearing 20 are formed as a combined bearing, which can further reduce the manufacturing cost of the bearing assembly.

As an example, the rotor 8 in this embodiment is a main shaft of a wind generating set, the wind generating set further comprises a hub and a generator, a first end of the main shaft is connected to the hub, a second end of the main shaft is connected to a rotor of the generator, and the first bearing 10 and the second bearing 20 are located at the first end of the main shaft. When the hub rotates, the main shaft transmits the rotation of the hub to the rotor of the generator, so that the rotor is driven to rotate, and the power generation of the generator is realized.

In this embodiment, the first bearing 10 and the second bearing 20 are disposed at the first end of the main shaft so as to be disposed near the hub, and in the operation process of the wind turbine generator set, the first bearing 10 and the second bearing 20 bear the aerodynamic load, the gravity load and the inertial load of the wind turbine generator set impeller, thereby improving the bearing capacity of the shafting. Since the first bearing 10 and the second bearing 20 are engaged, there is no need to increase the size of a single bearing, and the manufacturing cost of a larger-sized bearing is significantly increased, so that the manufacturing cost of the shafting of the present embodiment is reduced.

With continued reference to the figures, in the present embodiment, the first bearing 10 is disposed close to the hub relative to the second bearing 20, the first bearing 10 including a first tapered roller bearing or a thrust ball bearing, and the second bearing 20 including a cylindrical roller bearing or a radial ball bearing. The first bearing 10 mainly bears axial thrust load along the rotating shaft 8 and partial radial load along the radial direction of the rotating shaft 8, and the second bearing 20 mainly bears radial load along the radial direction of the rotating shaft 8, and the first bearing 10 and the second bearing 20 are adjacently arranged along the axial direction of the rotating shaft 8, so that the bearing capacity of the shafting is improved through the combination of the first bearing 10 and the second bearing 20, and the manufacturing cost of the shafting is reduced.

In the present embodiment, the inner diameter of the first bearing 10 is larger than that of the second bearing 20, and the main shaft is formed as a stepped shaft to be matched with the first bearing 10 and the second bearing 20, respectively, to facilitate shafting positioning assembly. In this embodiment, the inner diameter of the first bearing 10 is larger than the inner diameter of the second bearing 20, which means that the inner diameter of the first bearing 10 in the radial direction of the rotating shaft 8 is larger than the inner diameter of the second bearing 20 in the radial direction of the rotating shaft 8.

Specifically, the stepped shaft includes a first shoulder 81 and a second shoulder 82 disposed at intervals along an axial direction of the rotating shaft 8, the first shoulder 81 is disposed near a hub (not shown) with respect to the second shoulder 82, a radius of the first shoulder 81 is larger than a radius of the second shoulder 82, a third shoulder 41 and a fourth shoulder 42 disposed at intervals along the axial direction of the rotating shaft 8 are disposed in the rotating shaft mounting hole of the bearing housing 40, the third shoulder 41 is disposed near the hub with respect to the fourth shoulder 42, and a radius of the third shoulder 41 is larger than a radius of the fourth shoulder 42.

In this embodiment, the radius of the first shoulder 81 may be the radius of the circle where the corner of the first shoulder 81 is located. The radius of the second shoulder 82 may be the radius of the circle in which the corner of the second shoulder 82 is located. It will be appreciated that the radius of the first shoulder 81 being greater than the radius of the second shoulder 82 means that the radial dimension of the first shoulder 81 along the shaft 8 is greater than the radial dimension of the second shoulder 82 along the shaft 8.

The radius of the third shoulder 41 being larger than the radius of the fourth shoulder 42 means that the third shoulder 41 is disposed outside the fourth shoulder 42 in the radial direction of the rotation shaft 8.

The first shaft shoulder 81 is arranged on one side of the first bearing 10 facing the hub, the first inner ring 2 of the first bearing 10 is propped against the first shaft shoulder 81, the third shaft shoulder 41 is arranged on one side of the first bearing 10 facing away from the hub, and the first outer ring 1 of the first bearing 10 is propped against the third shaft shoulder 41, so that the first bearing 10 is axially positioned through the cooperation of the first shaft shoulder 81 and the third shaft shoulder 41, the first bearing 10 is prevented from axially moving relative to the rotating shaft 8, and the use reliability of a shaft system is improved.

Further, the second shoulder 82 is disposed on a side of the second bearing 20 facing the first bearing 10, the second inner ring 4 of the second bearing 20 abuts against the second shoulder 82, the fourth shoulder 42 is disposed on a side of the second bearing 20 facing away from the first bearing 10, and the second outer ring 3 of the second bearing 20 abuts against the fourth shoulder 42, so that axial positioning of the second bearing 20 is achieved through cooperation of the second shoulder 82 and the fourth shoulder 42, axial play of the second bearing 20 relative to the rotating shaft 8 is avoided, and thus use reliability of the shafting is improved.

In order to improve the use reliability of the shafting, the first inner ring 2 is in interference fit with the rotating shaft 8, and the first outer ring 1 is in interference fit with the bearing seat 40. The second inner ring 4 is in interference fit with the rotating shaft 8, and the second outer ring 3 is in interference fit with the bearing seat 40.

In this embodiment, the radius of the first shaft shoulder 81 is larger than the radius of the second shaft shoulder 82, the radius of the second shaft shoulder 82 is larger than the inner diameter of the second inner ring 4 of the second bearing 20, the radius of the third shaft shoulder 41 is larger than the radius of the fourth shaft shoulder 42, and the radius of the third shaft shoulder 41 is the same as the outer diameter of the second bearing 20, and the outer diameter of the first bearing 10 is larger than the outer diameter of the second bearing 20, so that the shafting assembly is facilitated.

In this embodiment, the radius of the first shoulder 81 may be the radius of the circle where the corner of the first shoulder 81 is located. The radius of the second shoulder 82 may be the radius of the circle in which the corner of the second shoulder 82 is located. It will be appreciated that the radius of the first shoulder 81 being greater than the radius of the second shoulder 82 means that the radial dimension of the first shoulder 81 along the shaft 8 is greater than the radial dimension of the second shoulder 82 along the shaft 8.

The radius of the third shoulder 41 being larger than the radius of the fourth shoulder 42 means that the third shoulder 41 is disposed outside the fourth shoulder 42 in the radial direction of the rotation shaft 8.

In the present embodiment, the shaft assembly sequence may be, but not limited to, that the first bearing 10 is mounted on the rotating shaft 8, and then the second bearing 20 is mounted on the rotating shaft 8.

In this embodiment, the shafting comprises a first spacer ring 5 and a second spacer ring 6, the first spacer ring 5 is sleeved on the rotating shaft and is located between the second shoulder 82 and the second inner ring 4 along the axial direction of the rotating shaft 8, and the first spacer ring 5 is used for spacing the first bearing 10 and the second bearing 20, so that the first bearing 10 and the second bearing 20 are prevented from moving and interfering during the operation of the shafting. The first spacer ring 5 does not protrude from the second shoulder 82 along the radial direction of the rotating shaft 8, and the second spacer ring 6 is sleeved on the rotating shaft 8 and abuts against one side of the second inner ring 4 away from the hub. So through first spacer 5 and second spacer 6 cooperation to the axial both sides of second inner circle 4 fix a position, avoid second inner circle 4 to take place axial float for pivot 8 to the reliability of use of second inner circle 4 has been improved, in order to improve the reliability of use of shafting.

Further, the shafting further comprises a third spacer ring 7, the third spacer ring 7 is arranged at intervals on the radial outer side of the first spacer ring 5, and two axial ends of the third spacer ring 7 are respectively propped against between the outer ring of the first bearing 10 and the outer ring of the second bearing 20, so that the use reliability of the shafting is further improved.

As an example, the inner diameter of the third spacer ring 7 is not smaller than the inner diameter of the first outer ring 1 and the inner diameter of the second outer ring 3, so that accidental contact between the third spacer ring 7 and the bearing roller during the operation of the shafting is avoided, and the use reliability of the shafting is improved.

It will be appreciated that the radial inner ring aperture of the third spacer 7 along the rotary shaft 8 is not smaller than the radial inner ring minimum aperture of the first outer ring 1 and the radial inner ring aperture of the second outer ring 3 along the rotary shaft 8.

Specifically, the assembling steps of the shafting in this embodiment are:

the first inner ring 2 is sleeved on the rotating shaft 8 and abuts against the first shaft shoulder 81, then the first spacer ring 5 is sleeved on the rotating shaft 8 and abuts against the second shaft shoulder 82, the second inner ring 4 is sleeved on the rotating shaft 8 and abuts against the first spacer ring 5, and then the second spacer ring 6 is sleeved on the rotating shaft 8 and abuts against the second inner ring 4, so that the assembly of the main shaft sleeve is completed;

The second outer ring 3 is arranged on the bearing seat 40 and abuts against the fourth shaft shoulder 42, then the third spacer ring 7 is arranged on the bearing seat 40 and abuts against the second outer ring 3, and the first outer ring 1 is arranged on the bearing seat 40 and abuts against the third spacer ring 7, so that the assembly of the bearing seat assembly is completed;

And sleeving the preassembled main shaft sleeve and the bearing seat assembly together, so that the shaft system is assembled.

Returning to fig. 1, as an example, the shafting further comprises a second tapered roller bearing 30 arranged at the second end of the main shaft, the first tapered roller bearing and the second tapered roller bearing 30 being arranged face-to-face or back-to-back. The second tapered roller bearing 30 mainly receives an axial thrust load along the rotating shaft 8 and a partial radial load along the radial direction of the rotating shaft 8, wherein the first tapered roller bearing and the second tapered roller bearing 30 cooperate to receive an axial force of the rotating shaft 8. The second tapered roller bearing 30 performs axial limitation through the end cover 9, but not limited thereto, and the pretightening force of the second tapered roller bearing 30 can be adjusted by adjusting the position of the end cover 9, but not limited thereto.

In another aspect of the present disclosure, a wind power plant is provided, the wind power plant comprising a shafting as described above.

The bearing assembly provided by the present disclosure includes the first bearing 10 and the second bearing 20 adjacently disposed in combination, formed as a combined bearing, which improves the bearing capacity of the shafting, but reduces the manufacturing cost of the bearing assembly because it is not necessary to increase the size of a single bearing.

The first bearing 10 includes a tapered roller bearing that mainly receives an axial thrust load along the rotating shaft 8 and a partial radial load along the radial direction of the rotating shaft 8, and the second bearing 20 includes a cylindrical roller bearing that mainly receives a radial load along the radial direction of the rotating shaft 8, and the first bearing 10 and the second bearing 20 are disposed adjacently along the axial direction of the rotating shaft 8, so that the capability of the shafting against various loads is improved by the combination of the first bearing 10 and the second bearing 20.

In the description of the present disclosure, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present disclosure, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "affixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, communicatively connected, directly connected, indirectly connected through intermediaries, communicate within two elements, or interact with each other. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

The described features, structures, or characteristics of the disclosure may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the present disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

Claims (11)

1. A bearing assembly adapted for use in a wind turbine generator system, the bearing assembly comprising:

the bearing seat (40) is provided with a rotating shaft mounting hole for the rotating shaft (8) to pass through;

The bearing comprises a first bearing (10) and a second bearing (20), wherein the first bearing (10) and the second bearing (20) are arranged between the rotating shaft (8) and the bearing seat (40), the first bearing (10) and the second bearing (20) are arranged adjacently along the axial direction of the rotating shaft (8), the first bearing (10) can bear radial load and axial load, and the second bearing (20) can bear radial load.

2. Bearing assembly according to claim 1, wherein the shaft (8) is a main shaft of the wind power plant, the wind power plant further comprising a hub and a generator, a first end of the main shaft being connected to the hub, a second end of the main shaft being connected to a rotor of the generator, the first bearing (10) and the second bearing (20) being located at the first end of the main shaft, the first bearing (10) being arranged close to the hub with respect to the second bearing (20).

3. Bearing assembly according to claim 2, wherein the first bearing (10) comprises a first tapered roller bearing or a thrust ball bearing and the second bearing (20) comprises a cylindrical roller bearing or a radial ball bearing.

4. Bearing assembly according to claim 2, wherein the first bearing (10) has an inner diameter larger than the inner diameter of the second bearing (20), the spindle (8) being formed as a stepped shaft to mate with the first bearing (10) and the second bearing (20), respectively.

5. The bearing assembly according to claim 4, wherein the stepped shaft comprises a first shoulder (81) and a second shoulder (82) which are arranged at intervals along the axial direction of the rotating shaft (8), the first shoulder (81) is arranged close to the hub relative to the second shoulder (82), the radius of the first shoulder (81) is larger than the radius of the second shoulder (82), a third shoulder (41) and a fourth shoulder (42) which are arranged at intervals along the axial direction of the rotating shaft (8) are arranged in a rotating shaft mounting hole of the bearing seat (40), the third shoulder (41) is arranged close to the hub relative to the fourth shoulder (42), the radius of the third shoulder (41) is larger than the radius of the fourth shoulder (42),

The first shaft shoulder (81) is arranged on one side of the first bearing (10) facing the hub, the first inner ring (2) of the first bearing (10) is propped against the first shaft shoulder (81), the third shaft shoulder (41) is arranged on one side of the first bearing (10) facing away from the hub, the first outer ring (1) of the first bearing (10) is propped against the third shaft shoulder (41),

The second shoulder (82) is arranged on one side of the second bearing (20) facing the first bearing (10), the second inner ring (4) of the second bearing (20) abuts against the second shoulder (82), the fourth shoulder (42) is arranged on one side of the second bearing (20) facing away from the first bearing (10), and the second outer ring (3) of the second bearing (20) abuts against the fourth shoulder (42).

6. Bearing assembly according to claim 5, characterized in that the bearing assembly comprises a first spacer ring (5) and a second spacer ring (6), the first spacer ring (5) being arranged around the rotating shaft (8) and being arranged between the second shoulder (82) and the second inner ring (4) in the axial direction of the rotating shaft (8), the first spacer ring (5) not protruding from the second shoulder (82) in the radial direction of the rotating shaft (8), the second spacer ring (6) being arranged around the rotating shaft (8) and abutting against a side of the second inner ring (4) remote from the hub.

7. The bearing assembly according to claim 6, further comprising a third spacer (7), wherein the third spacer (7) is disposed radially outside the first spacer (5) at intervals, and both axial ends of the third spacer (7) are respectively abutted between the first outer ring (1) of the first bearing (10) and the second outer ring (3) of the second bearing (20).

8. Bearing assembly according to claim 7, wherein the inner diameter of the third cage (7) is not smaller than the inner diameter of the first outer ring (1) and the inner diameter of the second outer ring (3).

9. A bearing assembly according to claim 3, further comprising a second tapered roller bearing (30) disposed at the second end of the main shaft, the first tapered roller bearing and the second tapered roller bearing (30) being disposed face-to-face or back-to-back.

10. Shafting, characterized in that it comprises a rotating shaft (8) and a bearing assembly according to any one of claims 1-9, the rotating shaft (8) being rotatably arranged in the shaft mounting hole, the first bearing (10) and the second bearing (20) being arranged between the rotating shaft (8) and the bearing housing (40), respectively.

11. A wind generating set is characterized in that, the wind power generation set comprising the shafting of claim 10.