CN212867783U

CN212867783U - Wind turbine generator system driftage bearing running state monitoring devices

Info

Publication number: CN212867783U
Application number: CN202021310785.XU
Authority: CN
Inventors: 许炳坤; 高鑫; 王晓宇; 封新建
Original assignee: Northwest Electric Power Research Institute of China Datang Corp Science and Technology Research Institute Co Ltd
Current assignee: Northwest Electric Power Research Institute of China Datang Corp Science and Technology Research Institute Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-04-02
Anticipated expiration: 2030-07-07

Abstract

The utility model discloses a wind turbine generator system driftage bearing running state monitoring devices, including the driftage bearing, the driftage bearing includes bearing inner race and bearing outer lane that cup joints each other; the bearing outer ring is connected with the main frame, and the bearing inner ring is connected with the tower barrel; a plurality of yaw speed reducers are uniformly distributed on the yaw bearing, one end of each yaw speed reducer is connected with a yaw motor, and the other end of each yaw speed reducer is sleeved with a pinion and is in contact with an inner tooth surface of the bearing inner ring; a plurality of laser infrared distance measuring probes are uniformly distributed on the plane of the main frame corresponding to the inner ring of the bearing, and each laser infrared distance measuring probe is connected to the single chip microcomputer through a lead. The utility model discloses monitoring devices, through the relative driftage brake disc plane distance in laser infrared distance measuring probe measured real-time measurement main frame bottom plane, judge the concrete position change of driftage bearing, realize monitoring driftage bearing running state monitoring's purpose, can find the trouble in the early wearing and tearing stage of bearing, have fine practical value.

Description

Wind turbine generator system driftage bearing running state monitoring devices

Technical Field

The utility model belongs to the technical field of wind turbine generator system monitoring facilities, concretely relates to wind turbine generator system driftage bearing running state monitoring devices.

Background

The yaw bearing of the wind turbine generator is an important mechanical part for connecting the engine room and the tower drum, and under the working conditions of low rotating speed and heavy load for a long time, the bearing has no design defects, is well lubricated and can basically achieve the design service life. Actual operation conditions show that the yaw bearing has fewer faults in the running process of the unit.

As the operating time accumulates, the yaw bearing wears and eventually breaks down if poor lubrication is encountered. Because the part has fewer faults, the work attention degree of the fault early warning and judgment of the part is low, and the damage of the yaw bearing is directly caused and once the damage is found, the yaw bearing can not be used continuously basically.

Therefore, the effective wind turbine generator yaw bearing running state monitoring device can find faults in an early wear stage, judge the degradation state and provide a basis for planning maintenance or replacement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a wind turbine generator system driftage bearing running state monitoring devices has solved wind turbine generator system driftage bearing operation in-process, can not in time monitor out the problem of driftage bearing trouble.

The utility model adopts the technical scheme that the wind turbine generator yaw bearing running state monitoring device comprises a yaw bearing, wherein the yaw bearing comprises a bearing inner ring and a bearing outer ring which are mutually sleeved; the bearing outer ring is connected with the main frame, and the bearing inner ring is connected with the tower barrel; a plurality of yaw speed reducers are uniformly distributed on the yaw bearing, one end of each yaw speed reducer is connected with a yaw motor, and the other end of each yaw speed reducer is sleeved with a pinion and is in contact with an inner tooth surface of the bearing inner ring;

a plurality of laser infrared distance measuring probes are uniformly distributed on the plane of the main frame corresponding to the inner ring of the bearing, and each laser infrared distance measuring probe is connected to the single chip microcomputer through a lead.

The utility model is also characterized in that,

the yaw bearing is rigidly connected with the main frame through bolts; the yaw bearing and the tower cylinder are connected in a bolt rigid connection mode.

The yaw bearing is a single-row four-point contact ball slewing bearing.

And a yaw brake disc is fixedly connected to the surface of the tower drum, and a plurality of yaw calipers are uniformly distributed on the yaw brake disc.

The singlechip is located the lateral wall of yaw speed reducer, specifically is STM32F103C 8.

The number of the laser infrared ranging probes is not less than 8, the measurement precision is 0.5cm, and the specific model of the laser infrared ranging probes is PM18-D100V2-Y4L 2/C65.

The vertical distance between the main frame and the yaw brake disc is 30-45 mm.

The utility model has the advantages that: the utility model relates to a wind turbine generator system driftage bearing running state monitoring devices, through the driftage brake disc plane distance that the real-time measurement main frame bottom plane of laser infrared distance measuring probe measuring is relative, judge the concrete position change of driftage bearing, realize monitoring driftage bearing running state monitoring's purpose, can find the trouble in the early wearing and tearing stage of bearing, have fine practical value.

Drawings

Fig. 1 is a schematic structural diagram of a wind turbine generator yaw bearing operating state monitoring device of the present invention;

fig. 2 is the utility model relates to a wind turbine generator system driftage bearing running state monitoring devices in the top view of yaw bearing.

In the figure, 1, a yaw motor, 2, a yaw speed reducer, 3, a main frame, 4, a tower drum, 5, yaw calipers, 6, a yaw bearing, 7, a pinion, 8, an inner tooth surface, 9, a laser infrared distance measuring probe, 10, a yaw brake disc, 11, a bearing inner ring, 12, a bearing outer ring and 13, a single chip microcomputer are arranged.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model relates to a wind turbine generator system driftage bearing running state monitoring devices, as shown in figure 1, including driftage bearing 6, as shown in figure 2, driftage bearing 6 includes bearing inner race 11 and bearing outer race 12 that cup joint each other; the bearing outer ring 12 is rigidly connected with the main frame 3 through bolts, and the bearing inner ring 11 is rigidly connected with the tower barrel 4 through bolts; a plurality of yaw speed reducers 2 are uniformly distributed on the yaw bearing 6, one end of each yaw speed reducer 2 is connected with a yaw motor 1, and the other end of each yaw speed reducer 2 is sleeved with a pinion 7 and is in contact with an inner tooth surface 8 of a bearing inner ring 11; the main frame 3 rotates clockwise and counterclockwise relative to the tower 4 under the drive of the yaw motor 1.

The yaw bearing 6 is of an internal tooth surface structure, in particular to a single-row four-point contact ball slewing bearing; the initial defect of design is eliminated, the early failure modes of the bearing mainly comprise fatigue spalling, abrasion, corrosion, plastic deformation and the like, and under the normal condition, the early failure mode mainly comprises contact fatigue. When the yaw bearing 6 is worn, the phenomenon is mainly reflected in that the rolling bodies and the inner and outer walls of the roller path are repeatedly peeled off and glued, the roller path clearance is increased, the bearing outer ring 12 is connected with the main frame 3, the inner and outer rings of the yaw bearing 6 relatively move due to the fact that the gravity center of an impeller, a hub and a cabin which are carried by the main frame 3 is close to the front, and the main frame 3 inclines relative to the plane of the yaw brake disc 10.

The surface of the tower barrel 4 is also fixedly connected with a yaw brake disc 10, and a plurality of yaw calipers 5 are uniformly distributed on the yaw brake disc 10. A plurality of laser infrared distance measuring probes 9 are uniformly distributed on the plane of the main frame 3 corresponding to the bearing inner ring 11, each laser infrared distance measuring probe 9 is connected to a single chip microcomputer 13 through a lead, and the single chip microcomputer is STM32F103C 8.

The laser infrared ranging probe 9 is fixed at the bottom of the main frame 3 in a magnetic attraction and adhesion mode, and the specific model of the laser infrared ranging probe 9 is PM18-D100V2-Y4L 2/C65. The number of the laser infrared distance measuring probes 9 is not less than 8, the measuring precision is 0.5cm, and the laser infrared distance measuring probes 9 are vertically opposite to the yawing brake disc 10.

The vertical distance between the main frame 3 and the yaw brake disc 10 is 30-45mm and is not less than a 9 cm distance measurement blind area of the laser infrared distance measurement probe.

The utility model relates to a wind turbine generator system driftage bearing running state monitoring devices's working process as follows:

the laser infrared distance measuring probe 9 is used for measuring the plane distance of the yawing brake disc 10 opposite to the bottom plane of the main frame 3 in real time, so that the purpose of monitoring the running state of the yawing bearing 6 is realized. Considering that the initial running state of the yaw bearing 6 is unknown and the degradation trend of the low-speed heavy-load bearing is slow, the sampling frequency is set to be 1 min.

In the monitoring process, when the measured value of the laser infrared distance measuring probe 9 close to the front end of the engine room is reduced, the measured value of the laser infrared distance measuring probe 9 close to the tail part of the engine room is increased, the trend that the inner ring and the outer ring move relatively at the moment is shown, the flowability, the color and the hardness of grease overflowing from the bearing lubrication and whether the bearing has abnormal sound when the engine room drifts are immediately checked on site, the normal operation of the yaw bearing 6 is accurately judged, and a basis is provided for planning, overhauling or replacement.

Claims

1. The device for monitoring the running state of the yaw bearing of the wind turbine generator is characterized by comprising a yaw bearing (6), wherein the yaw bearing (6) comprises a bearing inner ring (11) and a bearing outer ring (12) which are sleeved with each other; the bearing outer ring (12) is connected with the main frame (3), and the bearing inner ring (11) is connected with the tower barrel (4); a plurality of yaw speed reducers (2) are uniformly distributed on the yaw bearing (6), one end of each yaw speed reducer (2) is connected with a yaw motor (1), and the other end of each yaw speed reducer (2) is sleeved with a pinion (7) and is in contact with an inner tooth surface (8) of a bearing inner ring (11);

a plurality of laser infrared distance measuring probes (9) are uniformly distributed on a plane corresponding to the main frame (3) facing the bearing inner ring (11), and each laser infrared distance measuring probe (9) is connected to the single chip microcomputer (13) through a lead.

2. The wind turbine generator yaw bearing operation state monitoring device according to claim 1, characterized in that the yaw bearing (6) and the main frame (3) are rigidly connected by bolts; the yaw bearing (6) and the tower drum (4) are connected in a bolt rigid connection mode.

3. The wind turbine generator yaw bearing operating condition monitoring device according to claim 1, characterized in that the yaw bearing (6) is a single-row four-point contact ball slewing bearing.

4. The wind turbine generator yaw bearing operation state monitoring device according to claim 1, characterized in that a yaw brake disc (10) is further fixedly connected to the surface of the tower drum (4), and a plurality of yaw calipers (5) are uniformly distributed on the yaw brake disc (10).

5. The wind turbine generator yaw bearing running state monitoring device according to claim 4, characterized in that the single chip microcomputer (13) is located on a side wall of the yaw speed reducer (2), specifically STM32F103C 8.

6. The wind turbine generator yaw bearing running state monitoring device according to claim 4, characterized in that the number of the laser infrared distance measuring probes (9) is not less than 8, the measurement accuracy is 0.5cm, and the specific model of the laser infrared distance measuring probe (9) is PM18-D100V2-Y4L 2/C65.

7. The wind turbine generator yaw bearing operating condition monitoring device according to claim 4, characterized in that the vertical distance between the main frame (3) and the yaw brake disc (10) is 30-45 mm.