Supporting device for shafting, monitoring system and wind generating set

Abstract

The utility model provides a shafting supporting device, a monitoring system and a wind generating set, the shafting comprises a first shaft, a second shaft and a first bearing arranged between the first shaft and the second shaft, and the first shaft is sleeved on the outer side of the second shaft and can rotate relative to the second shaft through the first bearing. The supporting device is located at one end of the shaft system and comprises a bearing seat connected to one end of the first shaft through a first fixing piece; the outer ring of the second bearing is fixedly connected to the bearing seat; the thrust shaft is located on the inner side of the bearing seat in the radial direction of the shaft system and fixed to the second shaft through a second fixing piece, and an inner ring of the second bearing is connected to the thrust shaft; and one part of the end cover part is fixedly connected to the bearing seat through a third fixing piece. The supporting device can prolong the service life of the main shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, and more specifically, to a supporting device for a shaft system, a monitoring system and a wind power generator set. Background Art

[0002] Wind turbines are a type of clean energy power generation equipment that is widely used. The main shaft is the main key component of a wind turbine, and its life directly affects the operating efficiency and safety of the wind turbine. The main shaft is subjected to various stresses, high-speed rotation, and complex working conditions, and is prone to wear and fatigue during long-term operation.

[0003] The main shaft of a wind turbine generator set is affected by the load, and its service life may be reduced. In order to increase the life of the main shaft and extend the service life of the wind turbine generator set, it is crucial to develop a support device as a main shaft life extension device and monitor its operating status. In addition, the ease of use and reliability of the main shaft life extension device will also have a positive effect on improving the operating efficiency and reliability of the wind turbine generator set. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a support device for a shaft system, a monitoring system and a wind turbine generator set. The support device can reduce the axial load directly acting on the bearing of the shaft system and increase the service life of the bearing.

[0005] According to a first aspect of the present disclosure, a support device for a shaft system is provided, the shaft system includes a first shaft, a second shaft and a first bearing arranged between the first shaft and the second shaft, the first shaft sleeve is arranged on the outside of the second shaft and can rotate relative to the second shaft through the first bearing, the support device is located at one end of the shaft system and includes: a bearing seat, connected to one end of the first shaft via a first fixing member; a second bearing, the outer ring of the second bearing is fixedly connected to the bearing seat; a thrust shaft, located on the inner side of the bearing seat in the radial direction of the shaft system, fixed to the second shaft via a second fixing member, and the inner ring of the second bearing is connected to the thrust shaft; an end cover part, a part of the end cover part is fixedly connected to the bearing seat via a third fixing member.

[0006] According to an embodiment of the present disclosure, the plurality of third fixing members may be arranged in a ring shape around an outer circumference of a portion.

[0007] According to an embodiment of the present disclosure, the plurality of third fixing members may be located between the first fixing member and the second fixing member in the radial direction, and the plurality of third fixing members may extend linearly along the axial direction of the shaft system.

[0008] According to an embodiment of the present disclosure, the end cover portion may include: a bearing end cover, which is fixed to the bearing seat as a part via multiple third fixing members; a thrust bearing end cover, which is fixed to the thrust shaft; a sealing rubber ring, which is located on the inner side of the bearing end cover in the radial direction, and a sealing contact ring. In the radial direction, the bearing end cover, the sealing contact ring, the sealing contact ring and the thrust bearing end cover are arranged sequentially.

[0009] According to an embodiment of the present disclosure, the thrust bearing end cover may be in contact with the thrust shaft at a lower surface in the axial direction of the shaft system, and the thrust bearing end cover may be exposed outward at an upper surface in the axial direction.

[0010] According to an embodiment of the present disclosure, the thrust shaft may include: a cylindrical body, an inner ring of the second bearing is fixed to the cylindrical body; an annular extension portion, extending from the cylindrical body in a radial direction, a plurality of second fixing members are arranged around the annular extension portion, and the plurality of second fixing members pass through the annular extension portion along the axial direction of the shaft system and are fixed to the second shaft.

[0011] According to an embodiment of the present disclosure, the annular extension may include a step portion, the second bearing is supported on the step portion in the axial direction, a plurality of second fixing members are fixed outside the step portion in the radial direction, and the second bearing faces the plurality of second fixing members in the axial direction.

[0012] According to an embodiment of the present disclosure, the bearing seat may include: an annular body, an end cover portion installed on the annular body, an inclined extension portion extending from the annular body close to the first shaft along the axial direction of the shaft system, and a plurality of first fixing members arranged around the outer periphery of the inclined extension portion and fixed to the first shaft through the inclined extension portion and an outer ring end cover arranged on the first shaft.

[0013] According to an embodiment of the present disclosure, the inclined extension may at least partially overlap with the second bearing in the radial direction, and in the axial direction of the shaft system, the distance between the second bearing and the second fixing member is smaller than the extension distance of the inclined extension in the axial direction.

[0014] According to a second aspect of the present disclosure, a wind turbine generator set is provided. The wind turbine generator set includes the support device for a shaft system as described above and a generator, wherein the support device is connected to the generator via the shaft system.

[0015] According to a third aspect of the present disclosure, a monitoring system for a support device for a shaft system is provided. The support device for the shaft system is as described above, and the monitoring system includes: a sensor, mounted on a second shaft or a second bearing, to output at least one of vibration data and temperature data of the shaft system; a processor, receiving at least one of the vibration data and the temperature data, extracting at least one of the corresponding vibration amplitude and the temperature, and evaluating the state of the support device based on the extracted corresponding at least one of the vibration amplitude and the temperature.

[0016] According to an embodiment of the present disclosure, the sensor may include a temperature sensor and a vibration sensor. The temperature sensor may be installed in a reserved hole of the outer ring of the second bearing or attached to the outwardly exposed surface of the outer ring of the second bearing, and the vibration sensor may be installed on the inner ring of the second bearing.

[0017] According to an exemplary embodiment of the present invention, the first bearing may be a double-row roller bearing, so that the preload transmitted to the load-bearing bearing is uniform.

[0018] The support device for the shaft system according to the embodiment of the utility model can generate an axial preload, thereby offsetting the axial wind load and transferring the axial wind load to the fixed shaft, thereby not transmitting through the main bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The exemplary embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, and the above and other features and advantages of the present invention will become more clear. In the accompanying drawings:

[0020] Figure 1 is a schematic perspective view of a support device for a shaft system according to an embodiment of the present disclosure;

[0021] Figure 2 is a cross-sectional view of a support device for a shaft system according to an embodiment of the present disclosure;

[0022] Figure 3 yes Figure 2 an enlarged cross-sectional view of a portion C of FIG.

[0023] Figure 4 is a perspective view of a thrust shaft of a support device for a shaft system according to an embodiment of the present disclosure;

[0024] Figure 5 is a perspective view of a second bearing of a support device for a shaft system according to an embodiment of the present disclosure;

[0025] Figure 6 is a perspective view of a portion of a bearing seat of a support device for a shaft system according to an embodiment of the present disclosure;

[0026] Figure 7 is a three-dimensional view of a thrust bearing end cover of a support device for a shaft system according to an embodiment of the present disclosure;

[0027] Figure 8 is a three-dimensional diagram of a sealing rubber ring for a support device of a shaft system according to an embodiment of the present disclosure;

[0028] Fig. 9 is a perspective view of a sealing contact ring of a support device for a shaft system according to an embodiment of the present disclosure;

[0029] Fig.10is a perspective view of a portion of a rotating shaft retaining ring code disc of a supporting device for a shaft system according to an embodiment of the present disclosure;

[0030] Fig.11 is a schematic diagram of a monitoring system for a support device of a shaft system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] The following detailed description is provided to help gain a comprehensive understanding of the methods, devices and / or systems described herein. However, the order of operations described herein is only an example and is not limited to those orders set forth herein, but may be equivalently replaced or changed except for operations that must occur or be performed in a specific order. In addition, for greater clarity and simplicity, the description of content known in the art will be omitted or simplified.

[0032] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by a person of ordinary skill in the art to which the present disclosure belongs after understanding the present disclosure. Unless explicitly defined as such herein, terms (such as those defined in a general dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal manner.

[0033] Unless otherwise specified, the same reference numerals generally refer to the same elements (e.g., components, steps, and methods). Reference numerals described in the previous embodiments may be omitted if they appear again in the subsequent embodiments. In addition, the technical features described in different or the same embodiments may be combined in any manner, as long as the combined embodiments or technical solutions are complete and can solve the technical problems of the present application or achieve the technical effects described or not described in the present disclosure but can be determined based on the above complete technical solutions.

[0034] The shaft system according to the embodiment of the present disclosure generally includes a first shaft 1, a second shaft 2, and a first bearing 3 disposed between the first shaft 1 and the second shaft 2. The first shaft 1 may be sleeved on the outside of the second shaft 2, and the first bearing 3 is disposed between the first shaft 1 and the second shaft 2 in the radial direction of the shaft system, so that the first shaft 1 can rotate relative to the second shaft 2 through the first bearing 3. As an example, the first shaft 1 may be a moving shaft, and the second shaft 2 may be a fixed shaft.

[0035] Since the first bearing 3 is arranged in the shaft system, it is difficult to maintain and disassemble the first bearing 3 and replace it, and the maintenance cost is high. The support device according to the embodiment of the present disclosure can be used to extend the service life of the main shaft. Figures 1 to 10 The structure of the support device for the shaft system of the utility model is described.

[0036] Figure 1is a schematic perspective view of a support device for a shaft system according to an embodiment of the present disclosure; Figure 2 is a cross-sectional view of a support device for a shaft system according to an embodiment of the present disclosure; Figure 3 yes Figure 2 an enlarged cross-sectional view of a portion C of FIG. Figure 4 is a perspective view of a thrust shaft of a support device for a shaft system according to an embodiment of the present disclosure; Figure 5 is a perspective view of a second bearing of a support device for a shaft system according to an embodiment of the present disclosure; Figure 6 is a perspective view of a portion of a bearing seat of a support device for a shaft system according to an embodiment of the present disclosure; Figure 7 is a three-dimensional view of a thrust bearing end cover of a support device for a shaft system according to an embodiment of the present disclosure; Figure 8 is a three-dimensional diagram of a sealing rubber ring for a support device of a shaft system according to an embodiment of the present disclosure; Fig. 9 is a perspective view of a sealing contact ring of a support device for a shaft system according to an embodiment of the present disclosure; Fig.10 It is a stereoscopic view of a portion of a rotating shaft retaining ring code disc of a support device for a shaft system according to an embodiment of the present disclosure.

[0037] Reference Figure 1 According to an embodiment of the present disclosure, the support device 100 may be disposed at one axial end (e.g., the first end) of the shaft system, the support device or the one axial end of the shaft system may be located in the impeller of the wind turbine generator set, and the other axial end of the shaft system may be located in the nacelle of the wind turbine generator set.

[0038] According to the embodiment of the present disclosure, the support device 100 can provide axial prestress or axial preload, which can at least partially offset the axial load generated by the rotating component, reduce the axial load directly acting on the first bearing 3, and improve the fatigue life of the first bearing 3.

[0039] As an example, the supporting device 100 may generally have a circular ring structure matching the structure of the shaft system.

[0040] Reference Figures 1 to 3 The support device 100 for the shaft system according to the embodiment of the present disclosure may be located at the first end of the shaft system of the wind turbine generator set. The support device 100 may include a bearing seat 6, a second bearing 7, a thrust shaft 5 and an end cover 4.

[0041] Reference Figure 3 and Figure 6 The bearing seat 6 can be connected to one end of the first shaft 1 via the first fixing member 21, that is, the bearing seat 6 can be connected to the first shaft 1 as a moving shaft. The first fixing member 21 can be connected to the first shaft through the hole on the bearing seat 6. The first fixing member 21 can apply axial prestress to the first shaft 1.

[0042] As an example, the first fixing member 21 may be connected (e.g., threadedly connected) to the first shaft 1 through a hole (i.e., the first mounting hole 63) on the bearing seat 6. As an example, the edge of the bearing seat 6 may be provided with a plurality of first mounting holes 63 for the first fixing member 21 to pass through. One end of the first fixing member 21 may be inserted into the interior of the first shaft 1, so that the connection between the bearing seat 6 and the first shaft 1 is more secure. The first fixing member 21 may be a fastening member such as a bolt.

[0043] Reference Figure 6 The bearing seat 6 may include an annular body 62 and an inclined extension 61. In the axial direction of the shaft system, the end cover 4 may be mounted on the annular body 62, that is, the annular body 62 may support the end cover, and the annular body 62 may be provided with a plurality of second mounting holes 64, which may be used to fix at least a portion of the end cover 4 to the annular body 62, and the plurality of second mounting holes 64 may be formed in an annular shape and extend in the axial direction of the shaft system.

[0044] The inclined extension portion 61 may extend from the annular body 62 in the axial direction of the shaft system close to the first shaft 1. As an example, the inclined extension portion 61 may extend integrally outward from the annular body 62 in the radial direction of the shaft system, and the inclined extension portion 61 and the annular body 62 may be an integral structure to obtain higher structural strength.

[0045] As an example, the first mounting hole 63 on the bearing seat 6 may be located on the inclined extension portion 61 , and in the radial direction of the shaft system, the first mounting hole 63 may be located outside the second mounting hole 64 .

[0046] Reference Figure 6 In the axial direction, the first mounting hole 63 may be located below the second mounting hole 64. The edge of the bearing seat 6 may be provided with a plurality of first mounting holes 63 for the first fixing member 21 to pass through. The number of the first mounting holes 63 may be the same as the number of the second mounting holes 64.

[0047] As an example, the second mounting hole 64 may be located in a flat portion of the inclined extension 61 that contacts the outer ring end cover of the first shaft 1, the upper surface of the flat portion in the axial direction (refer to Figure 6 ) can be flat to facilitate fixing the bearing seat 6 and the first shaft 1 by the first fixing member 21.

[0048] Reference Figure 3 and Figure 6, one end of the first fixing member 21 can be inserted into the inside of the first shaft 1, so that the connection between the bearing seat 6 and the first shaft 1 is more secure. The first fixing member 21 can be a fastening member such as a bolt. A plurality of first fixing members 21 can be arranged around the outer periphery of the inclined extension 61, and pass through the inclined extension 61 and the outer ring end cover 11 provided on the first shaft 1 to be fixed to the first shaft 1. One end of the first fixing member 21 can pass through the bearing seat 6 and the outer ring end cover 11 to be fixed inside the first shaft 1.

[0049] Reference Figure 3 , Figure 4 and Figure 5 The thrust shaft 5 can be located on the inner side of the bearing seat 6 in the radial direction of the shaft system, that is, the bearing seat 6 can be sleeved on the outside of the thrust shaft 5, and the thrust shaft 5 can be fixed to the second shaft 2 via the second fixing member 22, and the inner ring of the second bearing 7 is connected to the thrust shaft 5, and the outer ring of the second bearing 7 is fixedly connected to the bearing seat 6.

[0050] Refer to 3 and Figure 5 The second fixing member 22 can apply axial prestress to the second shaft 2. The second bearing 7 can be a single-row roller bearing.

[0051] The thrust shaft 5 may include a cylindrical body 51 and an annular extension 52. The cylindrical body 51 may be connected with the inner ring of the second bearing 7, the inner ring of the second bearing 7 may contact and be fixed to the cylindrical body 51, and the cylindrical body 51 may have a circular annular interface.

[0052] Reference Figure 3 , the annular extension 52 may extend in the radial direction from the cylindrical body 51. A plurality of second fixing members 22 may be arranged around the annular extension 52, and the plurality of second fixing members 22 may pass through the annular extension 52 in the axial direction of the shaft system and be fixed to the second shaft 2. The thickness of the annular extension 52 may be substantially the same as the thickness of the outer ring end cover 11.

[0053] The extension directions of the plurality of first fixing members 21 and the plurality of second fixing members 22 may be parallel to each other. The plurality of second fixing members 22 may extend in the axial direction of the shaft system, one end of the second fixing member may be inserted into the interior of the second shaft 2, and the other end of the second fixing member 22 may overlap with the inclined extension portion 61 in the radial direction of the shaft system.

[0054] The annular extension 52 may include a step portion 53, the second bearing 7 may be supported on the step portion 53 in the axial direction, a plurality of second fixing members 22 may be fixed to the outside of the step portion 53 in the radial direction, and the second bearing 7 may face the plurality of second fixing members 22 in the axial direction, that is, in the axial direction, at least a portion of the second fixing member 22 may overlap with the second bearing 7. The plurality of second fixing members 22 may be formed in an annular shape and arranged around the cylindrical body 51.

[0055] Reference Figure 3 , the inclined extension 61 may at least partially overlap with the second bearing 7 in the radial direction, and in the axial direction of the shaft system, the distance between the second bearing 7 and the second fixing member 22 may be smaller than the extension distance of the inclined extension 61 in the axial direction. Thus, the size of the support device can be reduced. When it is necessary to reduce the preload force in the axial direction of the first bearing 3, at least one of the first fixing member 21 and the second fixing member 22 can be adjusted. In addition, since there are multiple first fixing members 21 and the second fixing member 22 and they are arranged in a ring shape, the force or load applied by the first fixing member 21 and the second fixing member 22 can be made more uniform.

[0056] Reference Figure 3 A portion of the end cover 4 can be fixedly connected to the bearing seat 6 via the third fixing member 23. The end cover 4 can be used to ensure the structural stability of the support device, prevent external dust, impurities, etc. from entering the first bearing, and can have the functions of sealing and heat dissipation.

[0057] The plurality of third fixing members 23 may be arranged in a ring shape around the outer circumference of a portion of the end cover portion 4. In the axial direction of the shaft system, the plurality of third fixing members 23 may be arranged on the outer circumference of the end cover portion, and in addition to the 3 o'clock, 6 o'clock, 9 o'clock and 12 o'clock positions, the third fixing members 23 may also be arranged at least one other position. That is, the plurality of third fixing members 23 may include at least five third fixing members 23, and each third fixing portion 23 may extend straightly in the axial direction.

[0058] As an example, in the entire supporting device, the plurality of third fixing members 23 may be located at the outermost side in the axial direction. The plurality of third fixing members 23 may be located between the first fixing member 21 and the second fixing member 22 in the radial direction. The plurality of third fixing members 23 may be inserted into the second mounting hole 64 of the bearing seat 6.

[0059] In one example, the end cover portion 4 may include a bearing end cover 8 , a thrust bearing end cover 12 , a sealing rubber ring 10 and a sealing contact ring 9 .

[0060] Reference Figure 3 and Figure 7 The bearing end cover 8 may include a plurality of mounting holes, and the number of the mounting holes may correspond to the number of the third fixing members 23. The bearing end cover 8, as the part of the end cover portion 4, is fixed to the bearing seat 6 via a plurality of third fixing members 23. The end bearing end cover 8 may be annular, and in the radial direction, the bearing end cover may be located on the inner side of the inclined extension portion 61.

[0061] Reference Figure 3, the thrust bearing end cover 12 may be located at the center of the end cover portion 4 and may be fixed to the thrust shaft 5. The thrust bearing end cover 12 may contact the upper surface of the cylindrical body 51 of the thrust shaft 5 and be supported by the cylindrical body 51. In the radial direction, the thrust bearing end cover 12 may be located inside the bearing end cover 8 and the annular extension 52. The lower surface of the thrust bearing end cover 12 in the axial direction of the shaft system may contact the thrust shaft 5, and the upper surface of the thrust bearing end cover 12 in the axial direction is exposed outward.

[0062] Reference Figure 3 and Figure 8 The sealing rubber ring 10 may be annular and may be located on the inner side of the bearing end cover 8 in the radial direction. The sealing rubber ring 10 may contact the thrust bearing end cover 12 and the sealing contact ring 9 respectively. As an example, in the axial direction of the shaft system, a part of the sealing rubber ring 10 may be disposed on the bearing end cover 8 and may contact the bearing end cover 8.

[0063] Reference Figure 3 and Fig. 9 The sealing contact ring 9 may be annular, and in the radial direction of the shaft system, the bearing end cover 8, the sealing rubber ring 10, the sealing contact ring 9 and the thrust bearing end cover 12 are arranged in sequence. The sealing contact ring 9 may be provided with a plurality of mounting holes, and the sealing contact ring 9 may be fixed to the bearing end cover 8 by fastening members such as bolts.

[0064] Reference Figure 3 The first bearing 3 as the main bearing can be a double-row roller bearing. As an example, the main bearing can be a double-row tapered roller bearing, a double-row spherical roller bearing, or other bearings capable of bearing radial loads.

[0065] Generally, after the main bearing is assembled to the shaft system, an assembly clearance is reserved to reserve space for the thermal expansion of the inner ring, outer ring and rolling elements of the main bearing and to preserve the lubricating oil film.

[0066] When the inner or outer ring of the main bearing is subjected to axial load, the double-row rollers are unevenly loaded, that is, one row of rollers is heavily loaded and the other row of rollers is lightly loaded. When the outer ring raceway of the main bearing is subjected to axial force, the axial clearance of the front row decreases and the axial clearance of the rear row increases. As a result, the load borne by the front row roller raceway is greater than that borne by the rear row roller raceway, and the front row rollers are more likely to fail, thus affecting the fatigue life of the entire main bearing.

[0067] When the support device according to the embodiment of the utility model is installed at the axial end of the shaft system of the generator, when the inner ring raceway of the main bearing bears the axial load of the support device, the axial force can be directly transmitted to the fixed shaft, so that it can be transmitted to the fixed shaft without passing through the main bearing, so that the main bearing basically no longer bears the axial wind load or bears a smaller axial load. For double-row roller bearings, the phenomenon of uneven load on the two rows of rollers is eliminated, and the front and rear rows of rollers are more evenly loaded, thereby improving the fatigue life of the main bearing.

[0068] In addition, for wind turbines in service, the first bearing (i.e., main bearing) has been in operation for a certain number of years, and the wear of the front row rollers will be greater than the wear of the rear row rollers. The support device can adjust the axial preload so that the installed support device generates an axial prestressed load, so that the rear row rollers of the main bearing bear a larger load, thereby reducing the wear of the front row rollers, increasing the overall fatigue life of the main bearing, and making the service life of the main bearing greater than the design life.

[0069] Reference Fig.10 , refer to Figure 3 and Fig.10 The support device for the shaft system according to the embodiment of the present disclosure may further include a rotating shaft retaining ring code disc 30, which may be annular, and may include an inner mounting hole, which may be used to mount the rotating shaft retaining ring code disc 30 on the bearing seat 6, and the rotating shaft retaining ring code disc 30 may further include an outer mounting hole 301, which may be used to mount a rotary encoder, etc. In the radial direction, the outer mounting hole 301 may be located at the outermost side of the support device.

[0070] When installing the support device according to the embodiment of the present disclosure, the inner ring end cover of the original main shaft bearing can be removed first, the thrust shaft of the support device can be installed, and then the corresponding inner ring assembly can be installed. The outer ring end cover of the original main bearing can be removed, the bearing seat can be installed, the corresponding outer ring assembly can be installed, and then the outer ring end cover can be installed, the bearing end cover can be installed, the sealing rubber ring and the sealing contact ring can be installed, grease can be added to seal the grease hole, etc.

[0071] Reference Fig.11 According to an embodiment of the present disclosure, the monitoring system for the support device of the shaft system may include various sensors for collecting data, which may be installed at specific positions of the original main shaft and / or the moving shaft and the fixed shaft of the support device to detect the operating status of the support device and / or the main shaft. The data collected by the sensor may be transmitted to the processing module through the slip ring together with the data collected by the data acquisition storage module of the original main shaft, so as to be analyzed and processed.

[0072] However, this is only an example, and the monitoring system according to the embodiment of the present disclosure may include a processing module for specifically processing the data collected for the support device. The processing module according to the present disclosure may adopt an existing processing module, and the data processing and analysis involved in the processing module may adopt an existing data processing and analysis method.

[0073] As an example, the sensor may be mounted on the second shaft or the second bearing to output at least one of vibration data and temperature data of the shaft system.

[0074] The sensor may include a temperature sensor and a vibration sensor. The temperature sensor may be installed in a reserved hole of the outer ring of the second bearing or attached to the outwardly exposed surface of the outer ring of the second bearing. The vibration sensor may be installed on the inner ring of the second bearing.

[0075] The processing module may receive at least one of the vibration data and the temperature data, extract the corresponding at least one of the vibration amplitude and the temperature, and evaluate the state of the support device according to the extracted corresponding at least one of the vibration amplitude and the temperature.

[0076] As an example, when at least one of the extracted vibration amplitude and temperature exceeds a predetermined amplitude, it indicates that the supporting device may be abnormal, and the monitoring system will trigger an early warning mechanism to notify relevant personnel to take measures.

[0077] In addition, the monitoring system can also feed back the results to the maintenance personnel of the wind turbine so that necessary repairs and replacements can be made.

[0078] Furthermore, the monitoring system can be optimized and upgraded according to the test results and actual needs to improve the reliability and accuracy of the system. As an example, in addition to temperature and vibration, it is also possible to comprehensively judge whether the support device is in an abnormal state based on the operating conditions. In addition, other parameters such as the oil state and sound of the bearings (for example, the first bearing and the second bearing) can also be monitored to more comprehensively understand the operating status of the bearings.

[0079] In addition, compared with replacing the main bearing, installing a support device on an in-service wind turbine not only saves time but also reduces costs.

[0080] The use of the support device for the shaft system of the utility model can prevent the axial load from directly acting on the bearing of the shaft system or reduce the axial load acting on the bearing of the shaft system, thereby improving the fatigue life of the bearing of the shaft system.

[0081] The wind turbine generator set according to the embodiment of the present disclosure may include the support device for the shaft system as described above and a generator, wherein the support device is connected to the generator via the shaft system. The wind turbine generator set including the support device can improve the fatigue life of the generator by improving the fatigue life of the main bearing.

[0082] The modules, units or combinations thereof shown in the drawings may correspond to pure software codes or modules combining software and hardware.

[0083] As an example, when the processing module of the present disclosure is implemented in software, firmware, middleware or microcode, the program code or code segment for performing the corresponding operation can be stored in a computer-readable medium such as a storage medium, so that at least one processor or at least one computing device can perform the corresponding processing and analysis operations by reading and running the corresponding program code or code segment. In addition, the computer-readable medium or storage medium can cause the processor to perform the corresponding processing and analysis operations when the computer program is executed by the processor.

[0084] The support device for a shaft system according to the embodiment of the present disclosure can reduce the axial load directly acting on the bearing of the shaft system and increase the service life of the shaft system.

[0085] The monitoring system for a support device according to an embodiment of the present disclosure may be used to evaluate the status and / or performance of a main shaft life extension device (ie, the support device) of a wind turbine generator and its impact on the life of the original main shaft.

[0086] The monitoring system for the support device according to the embodiment of the present disclosure can discover potential risks of the support device in advance, reduce costs and increase efficiency, extend the service life of the original main shaft, and improve the reliability and economic benefits of the wind turbine generator set.

[0087] While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the claims.

Claims

1. A support device for a shaft system, the shaft system comprising a first shaft (1), a second shaft (2) and a first bearing (3) arranged between the first shaft (1) and the second shaft (2), the first shaft (1) being sleeved on the outside of the second shaft (2) and being rotatable relative to the second shaft (2) via the first bearing (3), characterized in that: The support device is located at one end of the shaft system and comprises: A bearing seat (6) connected to one end of the first shaft (1) via a first fixing member (21); a second bearing (7), the outer ring of the second bearing (7) being fixedly connected to the bearing seat (6); A thrust shaft (5), located inside the bearing seat (6) in the radial direction of the shaft system, fixed to the second shaft (2) via a second fixing member (22), and an inner ring of the second bearing (7) is connected to the thrust shaft (5); An end cover portion (4), a portion of which is fixedly connected to the bearing seat (6) via a third fixing member (23).

2. The support device for a shaft system according to claim 1, characterized in that: A plurality of the third fixing members (23) are arranged in a ring shape around the outer circumference of the portion.

3. The support device for a shaft system according to claim 2, characterized in that: The plurality of third fixing members (23) are located between the first fixing member (21) and the second fixing member (22) in the radial direction, and the plurality of third fixing members extend linearly along the axial direction of the shaft system.

4. The support device for a shaft system according to claim 1, characterized in that: The end cover portion (4) comprises: A bearing end cover (8), as the part, is fixed to the bearing seat (6) via a plurality of the third fixing members (23); A thrust bearing end cover (12) fixed to the thrust shaft (5); The sealing rubber ring (10) is located on the inner side of the bearing end cover (8) in the radial direction. The sealing contact ring (9) is arranged in sequence in the radial direction. The bearing end cover (8), the sealing rubber ring (10), the sealing contact ring (9) and the thrust bearing end cover (12) are arranged in sequence.

5. The support device for a shaft system according to claim 4, characterized in that: The lower surface of the thrust bearing end cover (12) in the axial direction of the shaft system is in contact with the thrust shaft (5), and the upper surface of the thrust bearing end cover (12) in the axial direction is exposed outward.

6. The support device for a shaft system according to claim 1, characterized in that: The thrust shaft (5) comprises: A cylindrical body (51), the inner ring of the second bearing (7) being fixed to the cylindrical body (51); An annular extension portion (52) extends from the cylindrical body (51) in the radial direction, and a plurality of second fixing members (22) are arranged around the annular extension portion (52). The plurality of second fixing members (22) pass through the annular extension portion (52) in the axial direction of the shaft system and are fixed to the second shaft (2).

7. The support device for a shaft system according to claim 6, characterized in that: The annular extension portion (52) includes a step portion, the second bearing (7) is supported on the step portion in the axial direction, a plurality of second fixing members (22) are fixed on the outside of the step portion in the radial direction, and the second bearing (7) faces the plurality of second fixing members (22) in the axial direction.

8. The support device for a shaft system according to claim 1, characterized in that: The bearing seat (6) comprises: an annular body (62), the end cover (4) being mounted on the annular body (62), An inclined extension portion (61) extends from the annular body (62) close to the first shaft (1) in the axial direction of the shaft system, and a plurality of first fixing members (21) are arranged around the outer periphery of the inclined extension portion (61) and pass through the inclined extension portion (61) and an outer ring end cover (11) provided on the first shaft (1) to be fixed to the first shaft (1).

9. The support device for a shaft system according to claim 8, characterized in that: The inclined extension portion (61) at least partially overlaps with the second bearing (7) in the radial direction, and in the axial direction of the shaft system, the distance between the second bearing (7) and the second fixing member (22) is smaller than the extension distance of the inclined extension portion (61) in the axial direction.

10. A wind turbine generator set, characterized in that: include: A support device for a shaft system and a generator according to any one of claims 1 to 9, wherein the support device is connected to the generator via the shaft system.

11. A monitoring system for a support device of a shaft system, characterized in that: The support device for a shaft system is as described in any one of claims 1 to 9, wherein the monitoring system comprises: a sensor mounted on the second shaft or the second bearing to output at least one of vibration data and temperature data of the shaft system; The processing module receives the at least one of the vibration data and the temperature data, extracts the corresponding at least one of the vibration amplitude and the temperature, and evaluates the state of the supporting device according to the extracted corresponding at least one of the vibration amplitude and the temperature.

12. The monitoring system for a shaft support device according to claim 11, characterized in that: The sensor includes a temperature sensor and a vibration sensor. The temperature sensor is installed in a reserved hole of the outer ring of the second bearing or attached to the outwardly exposed surface of the outer ring of the second bearing. The vibration sensor is installed on the inner ring of the second bearing.

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