A wind turbine main bearing loading test bench

Abstract

The present invention provides a wind turbine main bearing loading test bench for testing the performance of a wind turbine main bearing, comprising: a motor, a motor support, a test bench base, a coupling, a first fixing mechanism, a main shaft, a bearing loading test mechanism, and a second fixing mechanism; the motor is fixed on the motor support; the motor support, the first fixing mechanism, the bearing loading test mechanism, and the second fixing mechanism are fixed adjacent to each other on the test bench base in sequence; the coupling is arranged between the motor and the first fixing mechanism; the motor is connected to one end of the main shaft via a coupling; the bearing loading test mechanism comprises: a loading test support, a longitudinal fastening assembly, a transverse fastening assembly, an expansion assembly, and a sensor assembly. The wind turbine main bearing loading test bench provided by the present invention can simulate complex field bearing loading conditions, is suitable for bearings with different inner diameters, and can monitor bearing status in real time.

Description

Technical Field

[0001] The invention belongs to the technical field of wind turbine main bearings, and in particular relates to a wind turbine main bearing loading test bench. Background Art

[0002] Bearings are components in mechanical transmissions that reduce friction and wear and are widely used in various rotating shaft systems. However, wind turbine shafts operate outdoors year-round, subject to harsh working conditions, large temperature and humidity fluctuations, and periodically changing alternating loads, making them more susceptible to failure. Therefore, failure to monitor bearing status in real time and address it promptly can ultimately lead to bearing failure, fatally impacting equipment safety and reliability, resulting in serious safety incidents and significant economic losses. Given the difficulty and high cost of collecting data on wind turbine main bearings in the field, a small bearing loading test bench is needed to verify that bearings meet operating requirements during the development phase.

[0003] At present, most bearing testing platforms can only meet the needs of bearings of a single model and specification. Even if a few can test bearings of multiple models, they basically rely on complex manual replacement of rotating shafts, which wastes a lot of manpower and material resources, and it is difficult to ensure straightness. At the same time, most wind turbine bearing testing machines can only perform axial loading, which makes it difficult to simulate the actual stress state of the test bearing. The data obtained from the test is less reliable, the test results have large errors, and it is impossible to monitor the bearing status in real time.

[0004] That is, how to provide a wind turbine main bearing loading test bench that can simulate complex bearing loading conditions in the field, is suitable for bearings with different inner diameters, and can monitor the bearing status in real time is a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a wind turbine main bearing loading test bench for testing the performance of a wind turbine main bearing, comprising: a motor, a motor support, a test bench base, a coupling, a first fixing mechanism, a main shaft, a bearing loading test mechanism, and a second fixing mechanism; the motor is fixed to the motor support; the motor support, the first fixing mechanism, the bearing loading test mechanism, and the second fixing mechanism are fixed adjacent to each other on the test bench base in sequence; the coupling is arranged between the motor and the first fixing mechanism; the motor is connected to one end of the main shaft through the coupling, and the other end of the main shaft passes through the first fixing mechanism, the bearing loading test mechanism, and the second fixing mechanism;

[0006] The bearing loading test mechanism includes: a loading test support, a longitudinal fastening assembly, a transverse fastening assembly, an expansion assembly and a sensor assembly; the wind turbine main bearing passes through the loading test support, the longitudinal fastening assembly passes through the loading test support in the longitudinal direction of the loading test support and rests on the wind turbine main bearing, the transverse fastening assembly passes through the loading test support in the transverse direction of the loading test support and rests on the wind turbine main bearing, the expansion assembly is fixed between the main shaft and the wind turbine main bearing, and the sensor assembly is in contact with the longitudinal fastening assembly, the transverse fastening assembly, the expansion assembly and the wind turbine main bearing respectively.

[0007] As a further technical solution of the present invention, the sensor assembly includes a first pressure sensor; a first threaded hole is opened in the longitudinal direction of the loading test support; the longitudinal fastening assembly includes: a first loading pillar, a first compression spring, a first guide rod and a first fan-shaped retaining block, the first loading pillar is threadedly connected to the first threaded hole, one end of the first compression spring is sleeved on one end of the first loading pillar, the other end of the first compression spring is sleeved on one end of the first guide rod, the other end of the first guide rod presses the first pressure sensor, and the first pressure sensor is fixed on the first fan-shaped retaining block; the first loading pillar passes through the first threaded hole in the longitudinal direction of the loading test support and squeezes the first compression spring, the first guide rod, the first pressure sensor and the first fan-shaped retaining block in sequence, so that the first fan-shaped retaining block presses against the wind turbine main bearing.

[0008] As a further technical solution of the present invention, the sensor assembly includes a second pressure sensor; a second threaded hole is opened in the lateral direction of the loading test support; the lateral fastening assembly includes: a second loading pillar, a second compression spring, a second guide rod and a second fan-shaped retaining block, the second loading pillar is threadedly connected to the second threaded hole, one end of the second compression spring is sleeved on one end of the second loading pillar, the other end of the second compression spring is sleeved on one end of the second guide rod, the other end of the second guide rod presses the second pressure sensor, and the second pressure sensor is fixed on the second fan-shaped retaining block; the second loading pillar passes through the second threaded hole in the lateral direction of the loading test support and squeezes the second compression spring, the second guide rod, the second pressure sensor and the second fan-shaped retaining block in sequence, so that the second fan-shaped retaining block presses against the wind turbine main bearing.

[0009] As a further technical solution of the present invention, the expansion assembly includes an expansion sleeve and a semicircular key; the expansion sleeve is fixed between the main shaft and the wind turbine main bearing; the inner ring upper end of the expansion sleeve is provided with a first groove, and the outer ring upper end of the main shaft is provided with a second groove adapted to the first groove; the upper portion of the semicircular key with a curved side is fitted with the first groove, and the lower portion of the semicircular key with a curved side is fitted with the second groove;

[0010] The sensor assembly includes a clamping end cover, several fixing bolts and several third pressure sensors; the inner upper end of the clamping end cover contacts the other side of the semicircular key; one side of the clamping end cover contacts one side of the wind turbine main bearing, and the other side of the clamping end cover is provided with third threaded holes corresponding to the number of the fixing bolts. One end of each of the fixing bolts passes through a corresponding third threaded hole and is connected to one side of the expansion sleeve. Each of the third pressure sensors is installed on the clamping end cover and surrounds the other end of a corresponding fixing bolt.

[0011] As a further technical solution of the present invention, the main shaft is a stepped shaft, and the first shoulder of the stepped shaft is located on the inner side of the second groove and the clamping end cover.

[0012] As a further technical solution of the present invention, the first fixing mechanism and the second fixing mechanism are a vertical optical axis bracket seat, fasteners are provided in the circular holes at the upper ends of both sides of the vertical optical axis bracket seat, and a bearing is provided in the central circular hole of the vertical optical axis bracket seat, the outer ring of the bearing is fitted with the central circular hole, and the inner ring of the bearing is fitted with the outer ring of the main shaft.

[0013] As a further technical solution of the present invention, the first fan-shaped retaining block and the second fan-shaped retaining block are made of rubber material, a third groove is provided on one side of the first fan-shaped retaining block, and the first pressure sensor is fixed in the third groove; a fourth groove is provided on one side of the second fan-shaped retaining block, and the second pressure sensor is fixed in the fourth groove.

[0014] As a further technical solution of the present invention, a first circular groove is provided at one end of the first loading pillar, and the first circular groove contacts one end of the first guide rod; a first circular hole is provided on the side of the other end of the first loading pillar; a second circular groove is provided at one end of the second loading pillar, and the second circular groove contacts one end of the second guide rod; a second circular hole is provided on the side of the other end of the second loading pillar.

[0015] As a further technical solution of the present invention, the outer ring of the expansion sleeve is provided with a second shoulder, and the other side of the wind turbine main bearing is in contact with the second shoulder.

[0016] As a further technical solution of the present invention, the number of the third threaded holes, the fixing bolts and the third pressure sensor are all eight, and the eight third threaded holes are evenly distributed along the circumferential direction of the pressing end cover.

[0017] As a further technical solution of the present invention, there are two flexible telescopic wings, and the two flexible telescopic wings are symmetrically arranged on both sides of the flexible shapeable finger cuff.

[0018] Beneficial effects:

[0019] The present invention provides a wind turbine main bearing loading test bench. During actual operation, after the motor is started, the main shaft is driven to rotate synchronously through the coupling. At this time, the tester can apply loads of two different directions and sizes to the outer ring of the wind turbine main bearing by adjusting the longitudinal fastening assembly and the transverse fastening assembly on the bearing loading test mechanism, so as to simulate the complex loading conditions of the wind turbine bearing in the field. The specific value of the applied load can be collected by the sensor assembly; the inner diameter of the main shaft can be increased by setting the expansion assembly, so that it is suitable for wind turbine main bearings with different inner diameters, thereby improving the adaptability of the test bench; the sensor assembly installed on the bearing loading test mechanism will monitor the pressure value of the wind turbine main bearing in real time, and the state curve of the pressure value under different loads and speeds is compared with the state curve of the faulty bearing to achieve real-time monitoring of the state of the wind turbine main bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is an axonometric drawing of the overall structure of the present invention;

[0022] Figure 2 It is a side sectional view of the overall structure of the present invention;

[0023] Figure 3 This is the main view of the bearing loading test mechanism;

[0024] Figure 4 The figure is a cross-sectional view of the bearing loading test mechanism;

[0025] Figure 5 This is the main view of the vertical optical axis bracket;

[0026] Reference numerals:

[0027] 1. Motor;

[0028] 2. Motor support;

[0029] 3. Test bench base;

[0030] 4. Coupling;

[0031] 5. First fixing mechanism;

[0032] 6. Main shaft; 61. Second groove; 62. First shaft shoulder;

[0033] 7. Bearing loading test mechanism; 71. Loading test support; 72. Longitudinal fastening assembly; 721. First loading support; 722. First compression spring; 723. First guide rod; 724. First sector-shaped retaining block; 73. Transverse fastening assembly; 731. Second loading support; 732. Second compression spring; 733. Second guide rod; 734. Second sector-shaped retaining block; 74. Expansion assembly; 741. Expansion sleeve; 7411. First groove; 7412. Second shoulder; 742. Woodruff key; 75. Sensor assembly; 751. First pressure sensor; 752. Second pressure sensor; 753. Compression end cap; 754. Fixing bolt; 755. Third pressure sensor;

[0034] 8. Second fixing mechanism;

[0035] 9. Wind turbine main bearings;

[0036] 10. Vertical optical axis bracket seat; 101. Fastener; 102. Bearing. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] Example 1:

[0039] like Figure 1-5As shown, the present embodiment 1 provides a wind turbine main bearing loading test bench for testing the performance of a wind turbine main bearing, comprising: a motor 1, a motor support 2, a test bench base 3, a coupling 4, a first fixing mechanism 5, a main shaft 6, a bearing loading test mechanism 7, and a second fixing mechanism 8; the motor 1 is fixed on the motor support 2; the motor support 2, the first fixing mechanism 5, the bearing loading test mechanism 7, and the second fixing mechanism 8 are fixed adjacent to each other on the test bench base 3 in sequence; the coupling 4 is arranged between the motor 1 and the first fixing mechanism 5; the motor 1 is connected to one end of the main shaft 6 through the coupling 4, and the other end of the main shaft 6 passes through the first fixing mechanism 5, the bearing loading test mechanism 7, and the second fixing mechanism 8. ; The bearing loading test mechanism 7 includes: a loading test support 71, a longitudinal fastening assembly 72, a transverse fastening assembly 73, an expansion assembly 74 and a sensor assembly 75; the wind turbine main bearing 9 passes through the loading test support 71, the longitudinal fastening assembly 72 passes through the loading test support 71 in the longitudinal direction of the loading test support 71 and rests on the wind turbine main bearing 9, the transverse fastening assembly 73 passes through the loading test support 71 in the transverse direction of the loading test support 71 and rests on the wind turbine main bearing 9, the expansion assembly 74 is fixed between the main shaft 6 and the wind turbine main bearing 9, and the sensor assembly 75 is in contact with the longitudinal fastening assembly 72, the transverse fastening assembly 73, the expansion assembly 74 and the wind turbine main bearing 9 respectively.

[0040] Specifically, the present invention provides a wind turbine main bearing loading test bench. During actual operation, after starting the motor 1, the main shaft 6 is driven to rotate synchronously through the coupling 4. At this time, the tester can adjust the longitudinal fastening component 72 and the transverse fastening component 73 on the bearing loading test mechanism 7 to apply two loads of different directions and sizes to the outer ring of the wind turbine main bearing 9, which is used to simulate the complex loading conditions of the wind turbine bearing in the field. The specific value of the applied load can be collected by the sensor component 75; by setting the expansion component 74, the inner diameter of the main shaft 6 can be increased, so that it is suitable for wind turbine main bearings 9 with different inner diameters, thereby improving the adaptability of the test bench; the sensor component 75 installed on the bearing loading test mechanism 7 will monitor the pressure value of the wind turbine main bearing 9 in real time, and the state curve of the pressure value under different loads and speeds is compared with the state curve of the faulty bearing to achieve real-time monitoring of the state of the wind turbine main bearing 9.

[0041] In some possible embodiments, the sensor assembly 75 includes a first pressure sensor 751; a first threaded hole is opened in the longitudinal direction of the loading test support 71; the longitudinal fastening assembly (7) includes: a first loading pillar 721, a first compression spring 722, a first guide rod 723 and a first fan-shaped retaining block 724, the first loading pillar 721 is threadedly connected to the first threaded hole, one end of the first compression spring 722 is sleeved on one end of the first loading pillar 721, the other end of the first compression spring 722 is sleeved on one end of the first guide rod 723, the other end of the first guide rod 723 presses the first pressure sensor 751, and the first pressure sensor 751 is fixed on the first fan-shaped retaining block 724; the first loading pillar 721 passes through the first threaded hole in the longitudinal direction of the loading test support 71 and squeezes the first compression spring 722, the first guide rod 723, the first pressure sensor 751 and the first fan-shaped retaining block 724 in sequence, so that the first fan-shaped retaining block 724 presses against the wind turbine main bearing 9.

[0042] Those skilled in the art can understand that the first loading pillar 721 passes through the first threaded hole in the longitudinal direction of the loading test support 71 to squeeze the first compression spring 722, the first guide rod 723, the first pressure sensor 751 and the first fan-shaped retaining block 724 in sequence, so that the first fan-shaped retaining block 724 is pressed against the wind turbine main bearing 9, so that the first guide rod 723 applies a vertical load to the wind turbine main bearing 9, and the specific value of the vertical load applied by the first loading pillar 721 to the wind turbine main bearing 9 is collected through the first pressure sensor 751, and the vibration energy generated by the contact between the first loading pillar 721 and the outer ring of the wind turbine main bearing 9 is absorbed by the first compression spring 722, thereby improving the stability of the bearing loading test mechanism 7 and reducing interference with the bearing vibration signal.

[0043] In some possible embodiments, the sensor assembly 75 includes a second pressure sensor 752; a second threaded hole is opened in the lateral direction of the loading test support 71; the lateral fastening assembly 73 includes: a second loading pillar 731, a second compression spring 732, a second guide rod 733 and a second fan-shaped retaining block 734, the second loading pillar 731 is threadedly connected to the second threaded hole, one end of the second compression spring 732 is sleeved on one end of the second loading pillar 731, the other end of the second compression spring 732 is sleeved on one end of the second guide rod 733, and the other end of the second guide rod 733 presses the second pressure sensor 752, and the second pressure sensor 752 is fixed on the second fan-shaped retaining block 734; the second loading pillar 731 passes through the second threaded hole in the lateral direction of the loading test support 71 and squeezes the second compression spring 732, the second guide rod 733, the second pressure sensor 752 and the second fan-shaped retaining block 734 in sequence, so that the second fan-shaped retaining block 734 presses against the wind turbine main bearing 9.

[0044] Those skilled in the art can understand that the second loading pillar 731 passes through the second threaded hole in the lateral direction of the loading test support 71 to squeeze the second compression spring 732, the second guide rod 733, the second pressure sensor 752 and the second fan-shaped retaining block 734 in sequence, so that the second fan-shaped retaining block 734 is pressed against the wind turbine main bearing 9, so that the second guide rod 733 applies a horizontal load to the wind turbine main bearing 9, and the specific value of the horizontal load applied by the second loading pillar 731 to the wind turbine main bearing 9 is collected through the second pressure sensor 752, and the second compression spring 732 can absorb the vibration energy generated by the contact between the second loading pillar 731 and the outer ring of the wind turbine main bearing 9, thereby improving the stability of the bearing loading test mechanism 7 and reducing interference with the bearing vibration signal.

[0045] In some possible embodiments, the expansion assembly 74 includes an expansion sleeve 741 and a semicircular key 742; the expansion sleeve 741 is fixed between the main shaft 6 and the wind turbine main bearing 9, the upper end of the inner ring of the expansion sleeve 741 is provided with a first groove 7411, and the upper end of the outer ring of the main shaft 6 is provided with a second groove 61 adapted to the first groove 7411; the upper part of the curved side of the semicircular key 742 is fitted with the first groove 7411, and the lower part of the curved side of the semicircular key 742 is fitted with the second groove 61; the sensor assembly 75 includes a pressing end cover 753, several A fixing bolt 754 and several third pressure sensors 755; the inner upper end of the clamping end cover 753 contacts the other side of the semicircular key 742; one side of the clamping end cover 753 contacts one side of the wind turbine main bearing 9, and the other side of the clamping end cover 753 is provided with third threaded holes corresponding to the number of the fixing bolts 754, and one end of each of the fixing bolts 754 passes through a corresponding third threaded hole and is connected to one side of the expansion sleeve 741, and each of the third pressure sensors 755 is installed on the clamping end cover 753 and surrounds the other end of a corresponding fixing bolt 754.

[0046] This is because the expansion sleeve 741 is fixed between the main shaft 6 and the wind turbine main bearing 9, which can increase the inner diameter of the main shaft 6. The solution of bolt preload detection can improve the adaptability of the test bench, and the expansion sleeve 741 of different specifications of outer diameter can be replaced according to the different sizes of the wind turbine main bearing 9 to improve the adaptability of the test bench; a first groove 7411 is provided on the upper end of the inner ring of the expansion sleeve 741, and a second groove 61 adapted to the first groove 7411 is provided on the upper end of the outer ring of the main shaft 6; the upper part of the arc-shaped side of the semicircular key 742 is aligned with the The first groove 7411 fits together, and the lower part of the curved side of the semicircular key 742 fits together with the second groove 61, so that when the main shaft 6 rotates, the lower part of the semicircular key 742 in the second groove 61 is driven to rotate, and then the upper part of the semicircular key 742 in the first groove 7411 is driven to rotate, and finally the expansion sleeve 741 is driven to rotate; the pressure value of the fixing bolt 754 can be monitored in real time by the third pressure sensor 755, and the status of the wind turbine main bearing 9 can be monitored by comparing the status curve of the pressure value under different loads and speeds with the status curve of the faulty bearing.

[0047] In some possible implementations, the main shaft 6 is a stepped shaft, and the first shoulder 62 of the stepped shaft is located inside the second groove 61 and the pressing end cover 753 .

[0048] Those skilled in the art can understand that because the main shaft 6 is a stepped shaft, the first shoulder 62 of the stepped shaft is located on the inner side of the second groove 61 and the clamping end cover 753, so that the first shoulder can clamp the clamping end cover 753, thereby fixing the clamping end cover 753 and preventing it from moving laterally.

[0049] In some possible embodiments, the first fixing mechanism 5 and the second fixing mechanism 8 are a vertical optical axis bracket seat 10, and fasteners 101 are provided in the circular holes on the upper ends of both sides of the vertical optical axis bracket seat 10, and the central circular hole of the vertical optical axis bracket seat 10 is provided with a bearing 102, and the outer ring of the bearing 102 is fitted with the central circular hole, and the inner ring of the bearing 102 is fitted with the outer ring of the main shaft 6.

[0050] Those skilled in the art can understand that by forming a vertical optical axis bracket seat 10 through the first fixing mechanism 5 and the second fixing mechanism 8, the loading stability of the device can be improved; the distance between the circular holes can be changed by the fastener 101 to lock the bearing 102; the bearing 102 can support the mechanical rotating body, reduce its friction coefficient during movement, and ensure its rotation accuracy.

[0051] In some possible embodiments, the first sector-shaped retaining block 724 and the second sector-shaped retaining block 734 are made of rubber material, a third groove is provided on one side of the first sector-shaped retaining block 724, and the first pressure sensor 751 is fixed in the third groove; a fourth groove is provided on one side of the second sector-shaped retaining block 734, and the second pressure sensor 752 is fixed in the fourth groove.

[0052] Those skilled in the art will understand that by making the first fan-shaped retaining block 724 and the second fan-shaped retaining block 734 from rubber material, the outer ring of the wind turbine main bearing 9 can be ensured not to rotate during the loading process and the axial displacement of the outer ring can be prevented; the first pressure sensor 751 and the second pressure sensor 752 can be fixed through the third groove and the fourth groove, and the first pressure sensor 751 and the second pressure sensor 752 can be ensured not to shift during the loading process, thereby avoiding inaccurate collected pressure values.

[0053] In some possible embodiments, a first circular groove is provided at one end of the first loading pillar 721, and the first circular groove contacts one end of the first guide rod 723; a first circular hole 7211 is provided on the side of the other end of the first loading pillar 721; a second circular groove is provided at one end of the second loading pillar 731, and the second circular groove contacts one end of the second guide rod 733; a second circular hole 7311 is provided on the side of the other end of the second loading pillar 731.

[0054] Those skilled in the art can understand that the first circular groove can enable the first loading pillar 721 to be aligned with the first guide rod 723, thereby accurately applying a vertical load to the wind turbine main bearing 9; a first circular hole 7211 is provided on the side of the other end of the first loading pillar 721, so that an external device passes through the first circular hole 7211 to drive the first loading pillar 721 to rotate and thereby apply a load; the second circular groove can enable the second loading pillar 731 to be aligned with the second guide rod 733, thereby accurately applying a horizontal load to the wind turbine main bearing 9; a second circular hole 7311 is provided on the side of the other end of the second loading pillar 731, so that an external device passes through the second circular hole 7311 to drive the second loading pillar 731 to rotate and thereby apply a load.

[0055] In some possible implementations, the outer ring of the expansion sleeve 741 is provided with a second shoulder 7412 , and the other side of the wind turbine main bearing 9 is in contact with the second shoulder 7412 .

[0056] This is because a second shoulder 7412 is provided on the outer ring of the expansion sleeve 741, and the other side of the wind turbine main bearing 9 contacts the second shoulder 7412, so that one side of the second shoulder 7412 can press against the other side of the wind turbine main bearing 9, thereby fixing the wind turbine main bearing 9.

[0057] In some possible implementations, the number of the third threaded holes, the number of the fixing bolts 754 and the number of the third pressure sensors 755 are all eight, and the eight third threaded holes are evenly distributed along the circumferential direction of the pressing end cover 753 .

[0058] This is because the number of third threaded holes, fixing bolts 754 and third pressure sensors 755 is eight, and the eight third threaded holes are evenly distributed along the circumferential direction of the clamping end cover 753. The pressure value of each fixing bolt 754 can be monitored in real time. After applying different eccentric loads in each direction, the values ​​of the eight third pressure sensors 755 will change differently. By comparing the pressure value status curve under different loads and speeds with the status curve of the faulty bearing, the status monitoring of the wind turbine main bearing can be achieved.

[0059] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. However, these modifications, changes, or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present invention. They should all be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

[0060] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A wind turbine main bearing loading test bench for testing the performance of a wind turbine main bearing, characterized in that: include: A motor (1), a motor support (2), a test bench base (3), a coupling (4), a first fixing mechanism (5), a main shaft (6), a bearing loading test mechanism (7) and a second fixing mechanism (8); the motor (1) is fixed on the motor support (2); the motor support (2), the first fixing mechanism (5), the bearing loading test mechanism (7) and the second fixing mechanism (8) are fixed adjacent to each other on the test bench base (3); the coupling (4) is arranged between the motor (1) and the first fixing mechanism (5); the motor (1) is connected to one end of the main shaft (6) through the coupling (4), and the other end of the main shaft (6) passes through the first fixing mechanism (5), the bearing loading test mechanism (7) and the second fixing mechanism (8); The bearing loading test mechanism (7) comprises: a loading test support (71), a longitudinal fastening assembly (72), a transverse fastening assembly (73), an expansion assembly (74) and a sensor assembly (75); the wind turbine main bearing (9) passes through the loading test support (71), the longitudinal fastening assembly (72) passes through the loading test support (71) in the longitudinal direction of the loading test support (71) and abuts against the wind turbine main bearing (9), the transverse fastening assembly (73) passes through the loading test support (71) in the transverse direction of the loading test support (71) and abuts against the wind turbine main bearing (9), the expansion assembly (74) is fixed between the main shaft (6) and the wind turbine main bearing (9), and the sensor assembly (75) contacts the longitudinal fastening assembly (72), the transverse fastening assembly (73), the expansion assembly (74) and the wind turbine main bearing (9) respectively; The sensor assembly (75) includes a first pressure sensor (751); A first threaded hole is provided in the longitudinal direction of the loading test support (71); The longitudinal fastening assembly (72) includes: a first loading support (721), a first compression spring (722), a first guide rod (723) and a first fan-shaped retaining block (724), wherein the first loading support (721) is threadedly connected to the first threaded hole, one end of the first compression spring (722) is sleeved on one end of the first loading support (721), the other end of the first compression spring (722) is sleeved on one end of the first guide rod (723), the other end of the first guide rod (723) presses the first pressure sensor (751), and the first pressure sensor (751) is fixed on the first fan-shaped retaining block (724); the first loading support (721) passes through the first threaded hole in the longitudinal direction of the loading test support (71) to sequentially squeeze the first compression spring (722), the first guide rod (723), the first pressure sensor (751) and the first fan-shaped retaining block (724), so that the first fan-shaped retaining block (724) presses against the wind power main bearing (9); The sensor assembly (75) includes a second pressure sensor (752); A second threaded hole is provided in the transverse direction of the loading test support (71); The transverse fastening assembly (73) includes: a second loading support (731), a second compression spring (732), a second guide rod (733) and a second fan-shaped holding block (734), wherein the second loading support (731) is threadedly connected to the second threaded hole, one end of the second compression spring (732) is sleeved on one end of the second loading support (731), the other end of the second compression spring (732) is sleeved on one end of the second guide rod (733), the other end of the second guide rod (733) presses the second pressure sensor (752), and the second pressure sensor (752) is fixed on the second fan-shaped holding block (734); the second loading support (731) passes through the second threaded hole in the transverse direction of the loading test support (71) and sequentially squeezes the second compression spring (732), the second guide rod (733), the second pressure sensor (752) and the second fan-shaped holding block (734), so that the second fan-shaped holding block (734) presses against the wind power main bearing (9).

2. The wind turbine main bearing loading test bench according to claim 1, characterized in that: The expansion assembly (74) includes an expansion sleeve (741) and a semicircular key (742); the expansion sleeve (741) is fixed between the main shaft (6) and the wind turbine main bearing (9); the upper end of the inner ring of the expansion sleeve (741) is provided with a first groove (7411); the upper end of the outer ring of the main shaft (6) is provided with a second groove (61) adapted to the first groove (7411); the upper part of one side of the semicircular key (742) with an arc is fitted with the first groove (7411), and the lower part of one side of the semicircular key (742) with an arc is fitted with the second groove (61); The sensor assembly (75) includes a clamping end cover (753), a plurality of fixing bolts (754) and a plurality of third pressure sensors (755); the inner upper end of the clamping end cover (753) contacts the other side of the semicircular key (742); one side of the clamping end cover (753) contacts one side of the wind power main bearing (9), and the other side of the clamping end cover (753) is provided with third threaded holes corresponding to the number of the fixing bolts (754), one end of each of the fixing bolts (754) passes through a corresponding third threaded hole and is connected to one side of the expansion sleeve (741), and each of the third pressure sensors (755) is mounted on the clamping end cover (753) and surrounds the other end of a corresponding fixing bolt (754).

3. The wind turbine main bearing loading test bench according to claim 2 is characterized in that: The main shaft (6) is a stepped shaft, and the first shaft shoulder (62) of the stepped shaft is located inside the second groove (61) and the pressing end cover (753).

4. The wind turbine main bearing loading test bench according to claim 3 is characterized in that: The first fixing mechanism (5) and the second fixing mechanism (8) are a vertical optical axis support seat (10), wherein fasteners (101) are provided in the circular holes at the upper ends of both sides of the vertical optical axis support seat (10), and a bearing (102) is provided in the central circular hole of the vertical optical axis support seat (10), wherein the outer ring of the bearing (102) is fitted with the central circular hole, and the inner ring of the bearing (102) is fitted with the outer ring of the main shaft (6).

5. The wind turbine main bearing loading test bench according to claim 4 is characterized in that: The first sector-shaped retaining block (724) and the second sector-shaped retaining block (734) are made of rubber material. A third groove is provided on one side of the first sector-shaped retaining block (724), and the first pressure sensor (751) is fixed in the third groove; a fourth groove is provided on one side of the second sector-shaped retaining block (734), and the second pressure sensor (752) is fixed in the fourth groove.

6. The wind turbine main bearing loading test bench according to claim 5, characterized in that: A first circular groove is provided at one end of the first loading support (721), and the first circular groove contacts one end of the first guide rod (723); a first circular hole (7211) is provided on the side of the other end of the first loading support (721); a second circular groove is provided at one end of the second loading support (731), and the second circular groove contacts one end of the second guide rod (733); a second circular hole (7311) is provided on the side of the other end of the second loading support (731).

7. The wind turbine main bearing loading test bench according to claim 6, characterized in that: The outer ring of the expansion sleeve (741) is provided with a second shaft shoulder (7412), and the other side of the wind power main bearing (9) is in contact with the second shaft shoulder (7412).

8. The wind turbine main bearing loading test bench according to claim 7, characterized in that: The number of the third threaded holes, the fixing bolts (754) and the third pressure sensors (755) is eight, and the eight third threaded holes are evenly distributed along the circumferential direction of the pressing end cover (753).

Images