CN218844947U

CN218844947U - Disc spring device for preventing main shaft of wind generating set from moving backwards

Info

Publication number: CN218844947U
Application number: CN202223018154.2U
Authority: CN
Inventors: 张旭; 赵颖; 刘尧强
Original assignee: Shenyang Yituo Technology Co ltd
Current assignee: Shenyang Yituo Technology Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-04-11
Anticipated expiration: 2032-11-14

Abstract

The utility model discloses a control dish spring device that wind generating set main shaft moved backward, including the front axle bearing, be connected with the bearing between front axle bearing and the generator system main shaft, the front axle bearing both sides are connected with lid behind bearing protecgulum and the bearing respectively through the bolt, the bearing both sides are equipped with dish spring mechanism, dish spring mechanism includes holding ring, adjustment pad, clamp plate, spacer, location guide pillar and dish spring, the holding ring is located between bearing protecgulum and the bearing with the adjustment pad, clamp plate, spacer, location guide pillar and dish spring are located behind the bearing between lid and the bearing back cover. The utility model discloses in, set up holding ring, spacer, adjustment pad, location guide pillar, dish spring, gland and constitute dish spring mechanism. The positioning ring, the adjusting pad, the spacer bush and the pressing plate are of a symmetrical split type, and the axial force of the spindle is transmitted to the front bearing seat through the front bearing through the disc spring mechanism, so that the front bearing bears a certain axial force, the axial force of the rear bearing is reduced, and the service life of the rear bearing is prolonged.

Description

Disc spring device for preventing main shaft of wind generating set from moving backwards

Technical Field

The utility model relates to a facial restoration technical field especially relates to a butterfly spring device that suppresses wind generating set main shaft and move backward.

Background

The front bearing and the rear bearing of the main shaft system of the open-air/combined power 1.5MW wind turbine generator set both adopt self-aligning roller bearings, the bearings are characterized in that the assembly process is relatively easy, the economic cost is low, but the defects are that the bearings can not bear larger axial force, the stress analysis of the bearings when the bearings are subjected to axial thrust is shown in the attached figure 2 of the specification, when the main shaft is subjected to the axial force, the axial force is transmitted to the inner ring of the main bearing and is transmitted to the outer ring of the main bearing through the inner ring of the main bearing, in the process, the first roller is basically not subjected to the force, the second roller is subjected to the larger force, and counter force is formed between the outer ring and the inner ring roller path, which is expressed as roller path crushing. The self-aligning roller bearing is designed, the bearing clearance is positive clearance, the working condition can be used for several years under the condition that the lubricating condition is kept good, but under the condition that the lubrication is poor and the working condition is not changed, the service life of the bearing is greatly reduced. The edge of the bearing outer ring is abraded after long-time running, when sudden wind occurs, the chamfer angle of the bearing outer ring is impacted to cause peeling, and scrap iron generated by peeling is gathered near an oil discharge port along with grease in the continuous running process. Under the action of radial load, the iron chips generate large friction force between the roller and the bearing outer ring, so that the roller and the bearing outer ring are seriously abraded. Because there is iron fillings in the lubricating oil, not only lose lubricated effect, long-time operation leads to inside everywhere of bearing to all receive the damage of different degrees moreover. Under this kind of operating condition is in all the time to the bearing, raceway wearing and tearing cause the play increasingly big, and two and raceway clearance grow of fixed end bearing roller cause the shafting phenomenon that moves backward to appear after bearing the axial force, consequently the utility model provides a control disk spring device that wind generating set main shaft moved backward.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a disc spring device for controlling the backward movement of a main shaft of a wind generating set.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a disk spring device of control wind generating set main shaft back, includes the front axle bearing, be connected with the bearing between front axle bearing and the motor unit main shaft, the front axle bearing both sides are connected with bearing protecgulum and bearing back lid respectively through the bolt, the bearing both sides are equipped with dish spring mechanism, dish spring mechanism includes holding ring, adjustment pad, clamp plate, spacer, location guide pillar and dish spring, holding ring and adjustment pad are located between bearing protecgulum and the bearing, clamp plate, spacer, location guide pillar and dish spring are located between bearing back lid and the bearing back lid.

Furthermore, the adjusting pad is attached to the side wall of the outer ring of the bearing, and two sides of the positioning ring are respectively attached to the surfaces of the adjusting pad and the front cover of the bearing.

Furthermore, the spacer bush is attached to the side wall of the bearing outer ring, the pressure plate is attached to the surface of the bearing rear cover, and the positioning guide pillar is located in front of the spacer bush and the pressure plate.

Furthermore, the number of the disc springs is a plurality of groups.

Furthermore, the number of the disc springs in each group is two, the two disc springs are positioned in front of the spacer bush and the pressing plate, and the two disc springs are positioned on two sides of the positioning guide pillar.

The utility model has the advantages that:

the utility model discloses when using, through increase dish spring mechanism between the outer loop of front bearing and the back bearing cap, dish spring mechanism comprises holding ring, spacer, adjustment pad, location guide pillar, dish spring, gland. The positioning ring, the adjusting pad, the spacer bush and the pressing plate are of a symmetrical split type, and the axial force of the spindle is transmitted to the front bearing seat through the front bearing through the disc spring mechanism, so that the front bearing bears a certain axial force, the axial force of the rear bearing is reduced, and the service life of the rear bearing is prolonged. This solution uses 20 sets of disc springs and can provide 105kN of axial thrust. When the main shaft does not generate axial force, the pre-compression thrust of the disc spring is borne by the bearing outer ring, the bearing front cover and the bearing rear cover, and the front bearing does not bear axial load. When the wind speed is less than 7m/s, the axial force generated by the wind wheel is completely born by the disc spring group, the main shaft cannot be displaced, and the rear bearing is not subjected to the axial force. When the axial load of the front bearing is 105kN at most, the service life of the front bearing can reach 95000 hours (about 10.8 years). When the wind speed is more than 7m/s, the disc spring group bears 105kN of axial force, and the rest of axial force is borne by the rear bearing.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

figure 2 is a cross-sectional view before installation of the present invention.

Illustration of the drawings:

1. a motor group main shaft; 2. a bearing; 3. a first roller; 4. a second roller; 5. a front bearing seat; 6. a bearing front cover; 7. a bearing rear cover; 8. a positioning ring; 9. an adjustment pad; 10. pressing a plate; 11. a spacer sleeve; 12. positioning the guide post; 13. a disc spring.

Detailed Description

As shown in fig. 1, relate to a butterfly spring device that choke wind generating set main shaft moves backward, including front bearing seat 5, be connected with bearing 2 between front bearing seat 5 and the generator system main shaft 1, front bearing seat 5 both sides are connected with bearing protecgulum 6 and bearing back cover 7 respectively through the bolt, bearing 2 both sides are equipped with dish spring mechanism, dish spring mechanism includes holding ring 8, adjusting pad 9, pressing plate 10, spacer 11, location guide pillar 12 and dish spring 13, holding ring 8 and adjusting pad 9 are located between bearing protecgulum 6 and the bearing 2, pressing plate 10, spacer 11, location guide pillar 12 and dish spring 13 are located between bearing back cover 7 and the bearing back cover 7.

As shown in fig. 1, the adjusting pad 9 is attached to the outer ring side wall of the bearing 2, and two sides of the positioning ring 8 are respectively attached to the adjusting pad 9 and the surface of the front bearing cover 6. The spacer 11 is attached to the side wall of the outer ring of the bearing 2, the pressure plate 10 is attached to the surface of the bearing rear cover 7, and the positioning guide pillar 12 is located in front of the spacer 11 and the pressure plate 10. The disc springs 13 are in a plurality of groups. Each set of disc springs 13 is two, and two disc springs 13 are located in front of the spacer bush 11 and the pressing plate 10, and two disc springs 13 are located on two sides of the positioning guide pillar 12.

When in use: according to the scheme, 20 groups of disc springs are adopted, 105kN of axial reverse thrust can be provided, and when the main shaft 1 of the motor set does not generate axial force, the pre-compression thrust of the disc springs 13 is borne by the bearing outer ring, the bearing front cover 6 and the bearing rear cover 7, and the front bearing does not bear axial load. When the wind speed is less than 7m/s, the axial force generated by the wind wheel is completely born by the disc spring set, the main shaft 1 of the motor set cannot be displaced, and the rear bearing is not stressed by the axial force. When the axial load of the front bearing is 105kN at most, the service life of the front bearing can reach 95000 hours (about 10.8 years), when the wind speed is more than 7m/s, the disc spring group bears the axial force of 105kN, and the rest axial force is borne by the rear bearing.

The installation steps of the device are as follows:

1) And (4) turning off the fan, and performing necessary preparation work before construction such as main shaft hydraulic station braking, main shaft locking and the like.

2) And opening end covers of the front bearing and the rear bearing, and checking the damage of the bearings and the backward movement of the shafting.

3) And loosening the elastic support upper and lower adjusting bolts of the gear box.

4) And loosening the connecting bolt of the upper body and the lower body of the elastic support of the gear box.

5) Two 50-ton jacks are used for jacking the lower parts of the main shafts on the two sides of the front bearing seat, the radial force of the front bearing is removed, and the condition that the roller in the bearing is loosened can be judged.

6) Two jacks of 30 tons are arranged between the front bearing seat and the main shaft locking disc and are restored to move backwards by jacking forwards. Meanwhile, magnetic dial indicators are arranged on two sides of the front bearing seat to detect the distance between the front top of the locking disc and the front top of the locking disc.

7) In the process of front jacking, the peripheral clearance between the rolling bodies of the rear bearing and the raceway is checked, whether all the rolling bodies are in a floating state or not is checked, and the front jacking can be stopped when all the rolling bodies retract into the raceway by 2-4 mm.

8) And (3) driving the elastic support locking bolts at two sides of the gear box with torque according to the process requirements, and fully driving the gear box twice.

9) The elastic support adjusts the bolt to reset from top to bottom.

10 The front bearing outer ring is pushed to the theoretical size by a tool.

11 A positioning ring is arranged at the left side of the front bearing, the front end cover of the front bearing is restored, and molybdenum disulfide is coated at the thread of the bolt.

12 The upper part and the lower part of the disc spring unloading mechanism are assembled.

13 Sealant is coated on two sides of the split end cover of the disc spring unloading mechanism.

14 A disc spring unloading mechanism is arranged at the rear end of the front bearing seat, and an appropriate adjusting pad is selected according to the actual reset size of the bearing.

15 Recovering the rear end cover of the front bearing, and coating molybdenum disulfide at the thread of the bolt.

16 Release all jacks and observe the change in the magnetic dial indicator.

17 The unit can run normally after no abnormity is observed.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a disk spring device that choke wind generating set main shaft moves backward, includes front axle bearing (5), its characterized in that: the bearing (2) is connected between the front bearing seat (5) and the motor set spindle (1), a bearing front cover (6) and a bearing rear cover (7) are connected to the two sides of the front bearing seat (5) through bolts respectively, disc spring mechanisms are arranged on the two sides of the bearing (2), each disc spring mechanism comprises a positioning ring (8), an adjusting pad (9), a pressing plate (10), a spacer bush (11), a positioning guide pillar (12) and a disc spring (13), the positioning rings (8) and the adjusting pads (9) are located between the bearing front cover (6) and the bearing (2), and the pressing plates (10), the spacer bushes (11), the positioning guide pillars (12) and the disc springs (13) are located between the bearing rear cover (7) and the bearing rear cover (7).

2. The disc spring device for restraining the backward movement of the main shaft of the wind generating set according to claim 1, wherein: adjusting pad (9) and the outer lane lateral wall laminating of bearing (2), holding ring (8) both sides laminate with adjusting pad (9) and bearing protecgulum (6) surface respectively.

3. The disc spring device for restraining the backward movement of the main shaft of the wind generating set according to claim 1, wherein: the spacer bush (11) is attached to the side wall of the outer ring of the bearing (2), the pressure plate (10) is attached to the surface of the bearing rear cover (7), and the positioning guide pillar (12) is located in front of the spacer bush (11) and the pressure plate (10).

4. The disc spring device for restraining the backward movement of the main shaft of the wind generating set according to claim 3, wherein: the number of the disc springs (13) is a plurality of groups.

5. The disc spring device for restraining the backward movement of the main shaft of the wind generating set according to claim 4, wherein: the number of each group of disc springs (13) is two, the two disc springs (13) are located in front of the spacer bush (11) and the pressing plate (10), and the two disc springs (13) are located on two sides of the positioning guide pillar (12).