Bearing fatigue testing device based on variable pitch of wind driven generator

Abstract

The utility model provides a bearing fatigue testing device based on a variable pitch of a wind driven generator, belongs to the field of bearing testing, and aims to solve the problem of single bearing fatigue testing aspect. A driving motor is fixedly mounted in the middle of the top of the right side wall of the testing base, a sliding support is slidably connected to the left side of the top of the testing base, two driving rods are symmetrically and rotatably connected to the top end face of the sliding support, reciprocating balls are in threaded connection with the tops of the driving rods, and a reciprocating support is slidably connected to the outer sides of the reciprocating balls; according to the bearing fatigue testing device based on the variable pitch of the wind driven generator, a reciprocating ball head is controlled to continuously slide up and down through a reciprocating thread on a driving rod, and the reciprocating ball head controls a reciprocating bracket to slide up and down in a reciprocating manner, so that a driving shaft end of a motor is controlled to vibrate in an inner ring of a bearing through up-down reciprocating motion of the reciprocating bracket; and the working state of the bearing under the actual use condition is greatly simulated, so that the fatigue of the bearing for bearing the deflection load is tested.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing test technical field especially based on the bearing fatigue test device of wind driven generator variable pitch. BACKGROUND

[0002] Variable pitch bearing is one of the core components of wind driven generator, is installed between wind driven generator blade and hub, plays the key role of connecting rotor hub and rotor blade, controlling blade windward angle, controlling wind wheel rotating speed and fan output power, therefore, detecting variable pitch bearing fatigue resistance is particularly important, the existing bearing fatigue test device usually carries out fatigue degree detection to the wear degree of bearing rotation, but due to the application condition of variable pitch bearing, variable pitch bearing needs to bear alternating load and vibration, so the alternating load resistance, vibration fatigue of variable pitch bearing need to be tested. SUMMARY

[0003] The utility model discloses a bearing fatigue test device based on wind driven generator variable pitch to solve the problem that the existing bearing fatigue test device cannot carry out fatigue test to alternating load and vibration borne by variable pitch bearing according to the application condition of variable pitch bearing.

[0004] The utility model discloses a bearing fatigue test device based on wind driven generator variable pitch to solve the problem that the existing bearing fatigue test device cannot carry out fatigue test to alternating load and vibration borne by variable pitch bearing according to the application condition of variable pitch bearing.

[0005] The utility model discloses a bearing fatigue test device based on wind driven generator variable pitch, wherein the bearing fatigue test device based on wind driven generator variable pitch includes test base, the right side wall top middle part of test base is fixedly installed with drive motor, and the left side wall middle part of test base is fixedly installed with telescopic cylinder, the top left side of test base is slidably connected with sliding support, and the top end surface symmetry of sliding support is rotatably connected with two drive rods, the top of drive rod is screwd with reciprocating ball head, the outside of reciprocating ball head is slidably connected with reciprocating support, the left side wall middle part of reciprocating support is fixedly installed with motor, and the right end outside of the drive shaft of motor is fixedly connected with three hinged ends in annular array, and the inside right side of hinged end and outer support piece is connected.

[0006] Further, the right side of the test base is fixedly connected with a fixed side plate, the right side wall top middle part of the fixed side plate is fixedly installed with a drive motor, the left end drive shaft of the drive motor is connected with a three-jaw chuck, the left side wall of the three-jaw chuck is slidably connected with three three-jaw clamping blocks in annular array, and the opposite side walls of the three three-jaw clamping blocks are provided with inner anti-slip grooves.

[0007] Furthermore, a guide groove is provided in the middle of the top end face of the test base, and a guide slider is fixedly connected in the middle of the bottom end face of the sliding bracket. The guide slider is slidably connected in the guide groove, and the middle of the left side wall of the guide slider is connected to the right telescopic end of the telescopic cylinder.

[0008] Furthermore, an arch frame is fixedly connected to the middle of the top end face of the sliding bracket, and the top end of the drive rod is rotatably connected to the middle of the top of the arch frame. A driven bevel gear is fixedly installed on the lower side of the drive rod on the front side of the top of the sliding bracket. A control motor is fixedly installed on the front left side of the top end face of the sliding bracket. A drive bevel gear is fixedly connected to the rear end of the drive shaft of the control motor. The drive bevel gear and the driven bevel gear are meshed at a 90-degree angle.

[0009] Furthermore, a drive gear is fixedly connected to the bottom of each of the two drive rods, and the two drive gears are connected by a timing belt. A reciprocating thread is provided on the upper side of the two drive rods, and a reciprocating ball head is threaded onto the reciprocating thread.

[0010] Furthermore, side wing support plates are fixedly connected to the left and right outer walls of the reciprocating bracket, and a reciprocating ball head is slidably connected in the middle of the side wing support plate. The outer wall of the motor drive shaft, which is fixedly installed in the middle of the left side wall of the reciprocating bracket, is threaded. An adjustment block is threadedly connected to the motor drive shaft. The left side of the adjustment block is hexagonal and the right side is conical. The left side of the inner wall of the outer support plate and the right side wall of the adjustment block are slidably connected.

[0011] This invention provides a bearing fatigue testing device based on wind turbine pitch control, which has the following advantages:

[0012] 1. By inserting the outer support plate connected to the outer hinge end of the motor drive shaft into the inner ring of the bearing, and then adjusting the position of the adjusting block on the motor drive shaft so that the tapered end of the adjusting block is screwed into the inner side wall of the left end of the three outer support plates, the inner ring of the bearing is fixed by the outer side wall of the outer support plate, so that the inner and outer rings of the bearing can rotate independently to test the fatigue time of the bearing.

[0013] 2. By controlling the meshing connection of the drive bevel gear and driven bevel gear at the end of the motor drive shaft, the drive rod can be driven to rotate. The two drive rods rotate synchronously through the cooperation of the drive gear and the timing belt. When the drive rod rotates, the reciprocating ball head on the drive rod can continuously slide up and down through the reciprocating thread. The reciprocating ball head controls the reciprocating bracket to slide up and down, so that the up and down reciprocating motion of the reciprocating bracket controls the vibration of the drive shaft end of the motor in the inner ring of the bearing. This greatly simulates the working state of the bearing under actual use conditions, thereby testing the fatigue of the bearing under deflection load. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the left front side axial view structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the front structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall disassembled left front side axial view structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the overall disassembled right front side axial view structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the right side structure of the sliding bracket of this utility model;

[0019] Figure 6 This is a cross-sectional schematic diagram of the sliding bracket of this utility model.

[0020] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0021] 1. Test base; 101. Fixed side plate; 102. Guide slide; 2. Drive motor; 201. Three-jaw chuck; 202. Three-jaw clamping block; 203. Inner anti-slip groove; 3. Sliding bracket; 301. Arch frame; 302. Guide slider; 4. Telescopic cylinder; 5. Control motor; 501. Drive bevel gear; 6. Drive rod; 601. Drive gear; 602. Driven bevel gear; 603. Reciprocating thread; 7. Reciprocating ball head; 8. Reciprocating bracket; 801. Side wing support plate; 9. Motor; 901. Hinge end; 10. Outer support plate; 11. Adjusting block; 12. Synchronous belt. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0024] Example 1:

[0025] As attached Figure 1 To be continued Figure 6 As shown:

[0026] This utility model provides a bearing fatigue testing device based on wind turbine pitch control, comprising: a test base 1; a drive motor 2 fixedly installed at the middle of the top right side wall of the test base 1; a telescopic cylinder 4 fixedly installed at the middle of the left side wall of the test base 1; a sliding bracket 3 slidably connected to the top left side of the test base 1; two drive rods 6 symmetrically rotatably connected to the top end face of the sliding bracket 3; a reciprocating ball joint 7 threadedly connected to the top of the drive rod 6; a reciprocating bracket 8 slidably connected to the outer side of the reciprocating ball joint 7; a motor 9 fixedly installed at the middle of the left side wall of the reciprocating bracket 8; three hinged ends 901 fixedly connected in a circular array on the outer side of the right end of the drive shaft of the motor 9; and the hinged ends 901 connected to the inner right side of the outer support plate 10. A fixed side plate 101 is fixedly connected to the right side of the test base 1. A drive motor 2 is fixedly installed at the top center of the right side wall of the fixed side plate 101. A three-jaw chuck 201 is connected to the drive shaft at the left end of the drive motor 2. Three three-jaw clamping blocks 202 are slidably connected in a circular array in the left side wall of the three-jaw chuck 201. Inner anti-slip grooves 203 are opened in the opposite side walls of the three three-jaw clamping blocks 202. Specifically, by opening the inner anti-slip grooves 203 in the inner walls of the three-jaw clamping blocks 202 slidably connected in the three-jaw chuck 201 connected to the drive shaft of the drive motor 2, the inner anti-slip grooves 203 can increase the friction between the three-jaw clamping blocks 202 and the outer wall of the bearing when the three-jaw clamping blocks 202 fix the outer ring of the bearing, so as to further improve the fixing effect of the bearing.

[0027] The test base 1 has a guide groove 102 in the middle of the top end face, and a guide slider 302 is fixedly connected to the middle of the bottom end face of the sliding bracket 3. The guide slider 302 is slidably connected in the guide groove 102. The middle of the left side wall of the guide slider 302 is connected to the right telescopic end of the telescopic cylinder 4. Specifically, the telescopic end of the telescopic cylinder 4 is connected to the guide slider 302 so that the position of the sliding bracket 3 can be changed by the guide slider 302. Thus, by changing the position of the sliding bracket 3, the outer support plate 10 connected to the right end hinge 901 of the drive shaft of the motor 9 can be inserted between the inner rings of the bearing to meet the fatigue test of different bearings.

[0028] Among them, an arch frame 301 is fixedly connected to the middle of the top end face of the sliding bracket 3, and the top end of the drive rod 6 is rotatably connected to the middle of the top of the arch frame 301. A driven bevel gear 602 is fixedly installed on the lower side of the drive rod 6 on the front side of the top of the sliding bracket 3. A control motor 5 is fixedly installed on the front left side of the top end face of the sliding bracket 3. A drive bevel gear 501 is fixedly connected to the rear end of the drive shaft of the control motor 5. The drive bevel gear 501 and the driven bevel gear 602 are meshed at a 90-degree angle. The bottom of both drive rods 6 are fixedly connected to drive gears 601. The two drive rods 6 are connected by a synchronous belt 12. A reciprocating thread 603 is provided on the upper side of each drive rod 603, and a reciprocating ball head 7 is threaded onto the reciprocating thread 603. Side wing support plates 801 are fixedly connected to the left and right outer walls of the reciprocating bracket 8, and a reciprocating ball head 7 is slidably connected to the middle of the side wing support plate 801. The outer wall of the drive shaft of the motor 9, fixedly installed in the middle of the left side wall of the reciprocating bracket 8, is threaded. An adjusting block 11 is threaded onto the drive shaft of the motor 9. The left side of the adjusting block 11 is hexagonal and the right side is conical. The left side of the inner wall of the outer support plate 10 and the adjusting block 11... The sliding connection on the right side wall serves the following purpose: By inserting the outer support plate 10 connected to the outer hinge end 901 of the motor 9 drive shaft into the inner ring of the bearing, and then adjusting the position of the adjusting block 11 on the motor 9 drive shaft, the conical end of the adjusting block 11 is screwed into the inner side wall of the left end of the three outer support plates 10. The outer side wall of the outer support plate 10 then fixes the inner ring of the bearing, allowing the inner and outer rings of the bearing to rotate independently for testing the bearing's fatigue time. Finally, the engagement of the drive bevel gear 501 and the driven bevel gear 602 at the end of the motor 5 drive shaft is controlled. When connected, the drive rod 6 can be rotated. Through the cooperation of the drive gear 601 and the timing belt 12, the two drive rods 6 rotate synchronously. When the drive rod 6 rotates, the reciprocating ball head 7 connected to the drive rod 6 by the reciprocating thread 603 can slide up and down continuously. Thus, the reciprocating ball head 7 controls the reciprocating bracket 8 to slide up and down, so that the up and down reciprocating motion of the reciprocating bracket 8 controls the drive shaft end of the motor 9 to vibrate in the inner ring of the bearing. This greatly simulates the working state of the bearing under actual use conditions, thereby testing the fatigue of the bearing under deflection load.

[0029] Example 2:

[0030] By replacing the drive shaft of the electric motor 9 with a sliding shaft column, the combination of telescopic cylinder 4 controlling the sliding bracket 3 can be eliminated, thereby making the sliding bracket 3 more stable and reducing the impact on bearing fatigue testing.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Detachable installation can take many forms, such as through a combination of plug-in and snap-fit ​​connections, or through bolted connections, etc.

[0032] The foregoing, in conjunction with the embodiments and accompanying drawings, has clearly and completely described the concept, specific structure, and technical effects of the present invention, so as to fully understand the purpose, features, and effects of the present invention.

[0033] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages mentioned herein do not refer solely to direct contact between components, but rather to the possibility of creating a better connection structure by adding or removing connecting accessories, depending on the specific implementation.

[0034] The above embodiments, which describe the specific features of the present invention, are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above description of the invention shall fall within the scope of protection of the present invention.

Claims

1. A bearing fatigue test rig based on wind turbine pitch change, characterized in that: Including test base (1);The right side wall top of test base (1) is fixedly installed with drive motor (2) in the middle, the left side wall of test base (1) is fixedly installed with telescopic cylinder (4) in the middle, the top left side of test base (1) is slidably connected with sliding bracket (3); The top end surface of sliding bracket (3) is symmetrically rotatably connected with two drive rods (6), the top of drive rod (6) is threadedly connected with reciprocating ball head (7), the outer side of reciprocating ball head (7) is slidably connected with reciprocating bracket (8); The left side wall of reciprocating bracket (8) is fixedly installed with motor (9) in the middle, the outer side of the right end driving shaft of motor (9) is fixedly connected with three hinged ends (901) in ring array, the inner right side of hinged end (901) and outer support sheet (10) is connected.

2. The wind turbine generator variable pitch bearing fatigue test device of claim 1, wherein: The right side of test base (1) is fixedly connected with fixed side plate (101), the right side wall top of fixed side plate (101) is fixedly installed with drive motor (2) in the middle, the left end driving shaft of drive motor (2) is connected with three-jaw chuck (201), the left side wall of three-jaw chuck (201) is slidably connected with three three-jaw clamping blocks (202) in ring array, the opposite side walls of three three-jaw clamping blocks (202) are provided with inner anti-skid grooves (203).

3. The wind turbine generator variable pitch bearing fatigue test device of claim 1, wherein: The middle of the top end surface of test base (1) is provided with guide sliding groove (102), the middle of the bottom end surface of sliding bracket (3) is fixedly connected with guide sliding block (302), guide sliding block (302) is slidably connected in guide sliding groove (102), the middle of the left side wall of guide sliding block (302) is connected with the right side telescopic end of telescopic cylinder (4).

4. The wind turbine generator variable pitch bearing fatigue test device of claim 1, wherein: The middle of the top end surface of sliding bracket (3) is fixedly connected with arch bracket (301), the top of arch bracket (301) is rotatably connected with the top end of drive rod (6), the lower side of the drive rod (6) in front of the top of sliding bracket (3) is fixedly installed with driven bevel gear (602), the top end surface of sliding bracket (3) is fixedly installed with control motor (5) in front left, the rear end of the driving shaft of control motor (5) is fixedly connected with driving bevel gear (501), driving bevel gear (501) and driven bevel gear (602) are engagedly connected at a ninety-degree angle.

5. The wind turbine generator variable pitch bearing fatigue test device of claim 1, wherein: The bottom of the two drive rods (6) is fixedly connected with driving gear (601), the two driving gears (601) are connected by synchronous belt (12), the upper side of the two drive rods (6) is provided with reciprocating thread (603), the reciprocating thread (603) is threadedly connected with reciprocating ball head (7).

6. The wind turbine generator variable pitch bearing fatigue test device of claim 1, wherein: The left and right outer side walls of reciprocating bracket (8) are fixedly connected with side wing support plates (801), reciprocating ball head (7) is slidably connected in the middle of side wing support plate (801), the outer side wall of the driving shaft of motor (9) fixedly installed in the middle of the left side wall of reciprocating bracket (8) is provided with a thread, the driving shaft of motor (9) is threadedly connected with adjusting block (11), the left side of adjusting block (11) is hexagonal and the right side is conical, the inner wall left side of outer support sheet (10) is slidably connected with the right side wall of adjusting block (11).

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