A storage device capable of realizing dynamic balancing of standby rotor of fan

Abstract

This utility model discloses a storage device for achieving dynamic balancing of a spare rotor for a wind turbine. It includes a rotor and a rotor storage platform. The rotor comprises a rotor shaft and a rotor impeller. Rotor bearings are installed on the journals at both ends of the rotor shaft. A rotation mark is provided on the end face of one end of the rotor shaft. Two rotor supports are spaced apart on the rotor storage platform. A rotor shaft bracket for supporting the rotor shaft is provided on the top of the rotor supports. A hydraulic lifter base is provided on the rotor storage platform outside the two rotor supports. A hydraulic lifter is provided on the hydraulic lifter base, and a rotor bearing bracket is provided on the top of the hydraulic lifter. In the static state, the support relies on the arc-shaped surface contact between the rotor shaft bracket and the rotor shaft. During rotation, the support relies on the arc-shaped surface contact between the rotor bearing bracket and the rotor bearing. Both support structures provide fixation, buffering, and protection for the supported parts, thereby ensuring that the spare rotor of the wind turbine always maintains a good dynamic balance.

Description

Technical Field

[0001] This utility model relates to the daily maintenance of standby fan rotors in smelting enterprises, specifically to a storage device that can achieve dynamic balancing of standby fan rotors. Background Technology

[0002] Large centrifugal fans are the main equipment in the flue gas treatment system of smelting enterprises. The fan rotor is the key core component for the fan to transport the medium gas. The fan rotor is mainly composed of impeller, rotor shaft, rotor bearing and other parts. The rotor bears high load during the operation of the fan. Among them, the impeller is most prone to erosion corrosion wear of the blades, fatigue cracking and detachment of the impeller manufacturing welds, and adhesion and dust accumulation at various parts of the impeller in contact with flue gas under long-term high load operation. All of these problems will cause the dynamic balance of the fan rotor to be destroyed, and ultimately cause the fan to fail to operate normally due to severe rotor vibration.

[0003] In actual production and operation, enterprises must consider the optimal operating cost when configuring equipment for production lines. Therefore, the equipment in production systems is designed and configured with a single fan. Once a sudden rotor failure causes a shutdown, in order to restore normal operation, it is necessary to take emergency measures to dynamically balance the faulty rotor. Whether it is dynamic balancing on-site or outsourced to a professional factory for dynamic balancing, it takes a certain amount of time. This can lead to shutdown accidents caused by fan failures, resulting in serious losses to the normal production of the production system.

[0004] In order to solve the problem of rapid replacement of faulty rotors in actual production, enterprises adopt the following method: prepare a good spare rotor on site in advance, and then, according to the operation pattern of the fan, before the potential for rotor failure occurs, stop the fan in advance, remove the faulty rotor, and then quickly install and replace it with a good spare rotor, so that the fan can be restored to normal production operation in the shortest possible time.

[0005] During long-term on-site storage, the intact standby fan rotors prepared by enterprises are often constrained by on-site storage conditions. They are typically stored on a fixed rotor support, ensuring only reliable and stable suspension. Regular, angled rotation of the rotor is not possible. With the rotor suspended and stationary in a fixed position for extended periods, the rotor shaft deforms and bends under gravity. This disrupts the dynamic balance of the originally intact standby rotor, rendering it ineffective as a standby rotor for on-line fan replacement.

[0006] Therefore, how to ensure that the spare rotor of the fan maintains good dynamic balance performance during long-term suspended static storage, so as to ensure that the spare rotor can play a backup role at critical moments, meet the replacement needs of the fan in use on the production line, avoid the increase in operation and maintenance costs for enterprises to reserve an entire fan, and ensure that the enterprise's production stability and economic benefits are not affected is a problem worth studying.

[0007] This utility model differs from the previously announced patent CN219086966U, "A Wind Turbine Rotor Turning Device," in the following three aspects:

[0008] 1. The rotor support methods differ. This utility model's rotor has two support methods: the first is a support method where, in a stationary state, an elastic rubber pad is installed between the rotor shaft bracket and the rotor shaft, with a circular arc surface contact; the second is a support method where, during rotation, an elastic rubber pad is installed between the bearing bracket and the rotor bearing, with a circular arc surface contact. Both support structures provide fixation, buffering, and protection for the supported parts. In contrast, the rotor in patent CN219086966U relies on a rigid-to-rigid line contact support method between the three outer rings of the bearings at the top of the bracket and the support shaft, without any buffering, thus providing no fixation, buffering, or protection for the supported parts.

[0009] 2. The rotor rotation methods differ. In this invention, the rotor rotates by applying gentle force to the edge of the rotor impeller, which drives the rotor shaft and the inner ring of the rolling bearing tightly fitted together to rotate. This method involves fewer transmission components, resulting in high reliability, low force application, and easy, flexible rotation without damage to components. In contrast, the rotor in patent CN219086966U rotates by applying force to the drive wheel, which in turn drives the connecting frame, support plate, and connecting hole, causing the tightly bound support shaft to rotate under the support of multiple bearing outer rings. This method involves more transmission components, resulting in poor reliability, high force application, and significant frictional resistance when the support shaft rotates relying on three bearing outer rings, making rotation difficult and inflexible, and potentially damaging the support shaft during rotation.

[0010] 3. The rotor fixing methods differ. The rotor of this utility model is fixed by two rotor shaft brackets that stably support the rotor shaft. However, the rotor of patent CN219086966U requires a locating pin to connect with the first and second locating holes for fixation. Utility Model Content

[0011] In view of this, the purpose of this utility model is to provide a storage device that can achieve dynamic balancing of the spare rotor of a fan.

[0012] To achieve the above objectives, this utility model provides the following technical solution:

[0013] A storage device for achieving dynamic balancing of spare rotors for wind turbines includes a rotor and a rotor storage platform on the ground. The rotor includes a rotor shaft and a rotor impeller. Rotor bearings are installed on the journals at both ends of the rotor shaft, and one end of the rotor shaft extends out of the rotor bearing for connection with a coupling. The end face of the shaft head at one end of the rotor shaft is provided with a rotor rotation mark. Two rotor supports are spaced apart on the rotor storage platform. The top of the rotor supports is provided with a rotor shaft bracket for supporting the rotor shaft. A hydraulic lifter base is provided on the rotor storage platform outside the two rotor supports. A hydraulic lifter is provided on the hydraulic lifter base. The top of the hydraulic lifter is provided with a rotor bearing bracket. The rotor bearing bracket supports and disengages the rotor bearing by raising and lowering the hydraulic lifter.

[0014] Furthermore, the rotor bearing bracket is semi-circular, and the inner diameter of the rotor bearing bracket is matched with the outer diameter of the rotor bearing so that the contact surface between the rotor bearing bracket and the rotor bearing is in harmony. In addition, the contact surface between the rotor bearing and the bearing bracket is provided with an elastic rubber pad, which plays a role in fixing, buffering and protecting the rotor bearing.

[0015] Furthermore, the rotor shaft bracket is semi-circular, and the inner diameter of the rotor shaft bracket is matched with the outer diameter of the rotor shaft so that the contact surfaces of the rotor shaft bracket and the rotor shaft match. In addition, the contact surfaces between the rotor shaft bracket and the rotor shaft are provided with elastic rubber pads, which play a role in fixing, buffering and protecting the rotor shaft.

[0016] Furthermore, the rotor rotation indicator is installed on the end face of the coupling connection end of the rotor shaft, and is used to indicate the direction and angle of rotation when the rotor is rotated by a turning gear for dynamic balancing maintenance while it is stored at rest.

[0017] When the fan rotor on the rotor storage platform is stationary, the entire rotor is firmly supported by the rotor shaft brackets on top of the two rotor supports on the platform. The two rotor bearing brackets on the platform are completely detached from the rotor bearings and offer no support. When the rotor, stationary on the platform, is rotated for dynamic balancing, two hydraulic lifters placed on the hydraulic lifter bases are simultaneously and slowly raised vertically upwards. This pushes the two rotor bearing brackets on top to slowly rise, contacting and supporting the entire rotor as it slowly rises vertically upwards. Once the rotor shafts on both sides are completely detached from the rotor shaft brackets and there is no contact, the two hydraulic lifters are stopped. At this point, the entire rotor is completely freed from the support of the two rotor shaft brackets and is suspended in mid-air, relying entirely on the firm support of the two rotor bearing brackets on the storage platform. Then, manual and gentle lifting is performed. The impeller of the rotary disc rotates, driving the rotor shaft to rotate circumferentially through the rotor bearings at both ends. After rotating in the direction and angle (typically 120°) indicated by the rotor rotation markings on the rotor shaft end face, the rotor immediately stops rotating. Finally, two hydraulic lifters are simultaneously activated, slowly and vertically lowering the rotor to its original position. This, along with the two rotor bearing brackets above and the entire rotor they support, also slowly descends to their respective original positions. Once reset, the two rotor bearing brackets are completely disengaged from the rotor bearings and offer no support to the rotor. The reset rotor then returns to a stationary state, firmly supported by the two rotor shaft brackets on the storage platform. This completes one full rotation operation of the rotor on the storage platform.

[0018] The spare rotor on the storage platform needs to be manually rotated at fixed intervals (usually every 10 days) to continuously change the position of the rotor when it is stationary. This ensures that the spare rotor always maintains a good dynamic balance, so that the spare rotor can play its role in critical moments, meet the replacement needs of the fans in use on the production line, avoid the company from having to reserve an entire fan, which would increase the operation and maintenance costs, and ensure that the company's production stability and economic benefits are not affected. Attached Figure Description

[0019] Figure 1 This is a front view schematic diagram of the present invention;

[0020] Figure 2 This is a right-side view of the present invention;

[0021] In the diagram, 1. Rotor bearing, 2. Rotor shaft, 3. Rotor bearing bracket, 4. Hydraulic lifter, 5. Hydraulic lifter base, 6. Rotor support, 7. Rotor shaft bracket, 8. Rotor storage platform, 9. Rotor impeller, 10. Rotor rotation indicator, 11. Elastic rubber pad. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited thereto.

[0023] A storage device capable of achieving dynamic balancing of spare rotors for wind turbines, such as Figure 1 and Figure 2 As shown, the device includes a rotor and a rotor storage platform 8 on the ground. The rotor includes a rotor shaft 2 and a rotor impeller 9. Rotor bearings 1 are installed on the journals at both ends of the rotor shaft 2, and the right end of the rotor shaft 2 extends out of the rotor bearing 1 for connection with a coupling. A paper rotor rotation indicator 10 is affixed to the end face of the coupling connection end of the rotor shaft 2. Two rotor supports 6 are spaced apart on the rotor storage platform 8. The top of the rotor support 6 is provided with a rotor shaft bracket 7 for supporting the rotor shaft 2. A hydraulic lifting device base 5 is provided on the rotor storage platform 8 outside the rotor support 6. A hydraulic lifting device 4 is provided on the hydraulic lifting device base 5, and a rotor bearing bracket 3 is provided on the top of the hydraulic lifting device 4. The rotor bearing bracket 3 supports and disengages the rotor bearing 1 by raising and lowering the hydraulic lifting device 4. The rotor rotation indicator 10 is used to indicate the direction and angle of rotation of the rotor impeller 9 on the rotor storage platform 8 during periodic rotary rotation operations.

[0024] The rotor bearing bracket 3 is semi-circular, and the inner diameter of the rotor bearing bracket 3 is matched with the outer diameter of the rotor bearing 1 so that the contact surface of the rotor bearing bracket 3 and the rotor bearing 1 matches and forms a good surface contact. Furthermore, an elastic rubber pad 11 is installed on the contact surface between the rotor bearing 1 and the bearing bracket 3, which plays a role in fixing, buffering and protecting the rotor bearing 1.

[0025] The rotor shaft bracket 7 is semi-circular, and the inner diameter of the rotor shaft bracket 7 is matched with the outer diameter of the rotor shaft 2 so that the contact surfaces of the rotor shaft bracket 7 and the rotor shaft 2 match and form a good surface contact. Furthermore, an elastic rubber pad 11 is installed on the contact surface between the rotor shaft bracket 7 and the rotor shaft 2 to fix, buffer, and protect the rotor shaft 2.

[0026] When the rotor impeller 9 on the rotor storage platform 8 remains stationary, it is suspended in mid-air by the firm support of the rotor shaft brackets 7 on the top of the two rotor supports 6 on the rotor storage platform 8. There is no contact between the two rotor bearing brackets 3 and the rotor bearing 1, and they are completely detached, providing no support for the rotor bearing 1.

[0027] When performing periodic balancing rotation of the rotor impeller 9 on the rotor storage platform 8, firstly, simultaneously activate two hydraulic lifters 4 placed on the hydraulic lifter base 5 to slowly and vertically lift upwards, pushing the two rotor bearing brackets 3 on top to slowly rise and contact and support the rotor bearing 1, lifting it vertically and slowly. When the rotor shaft 2 on both sides is completely disengaged from the rotor shaft bracket 7 without any contact, simultaneously stop the two hydraulic lifters 4 from continuing to lift. At this point, the entire rotor shaft 2, rotor bearing 1, and rotor impeller 9 are completely freed from the support of the two rotor shaft brackets 7, becoming suspended and stationary entirely by the firm support of the two bearing brackets 3 on the storage platform 8. Then, manually and gently... The rotor impeller 9 is rotated by applying force, causing the rotor shaft 2 to rotate circumferentially within the rotor bearings 1 at both ends. After rotating according to the rotation direction and angle (generally 120°) indicated by the rotor rotation mark 10 on the rotor shaft end face, the rotor impeller 9 immediately stops rotating. Finally, the two hydraulic lifters 4 are simultaneously activated to slowly and vertically lower the rotor impeller 9 to its original position. This, along with the two rotor bearing brackets 3 above them and the rotor bearings 1, rotor shaft 2, and rotor impeller 9 they support, also slowly descend to their respective original positions. Once reset, the two rotor bearing brackets 3 are completely disengaged from the rotor bearings 1 and provide no support. The reset rotor impeller 9 then returns to a stationary state, firmly supported by the rotor shaft brackets 7 on top of the two rotor supports 6 on the rotor storage platform 8. This completes one full rotation operation of the rotor impeller 9 and rotor shaft 2 on the rotor storage platform 8.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the specific implementation of this utility model and not to limit it. Those skilled in the art should understand that any equivalent substitutions or obvious modifications made to the implementation of this utility model without changing its performance or use, without violating the spirit of this utility model, should be covered within the scope of protection claimed by this utility model.

Claims

1. A storage device capable of achieving dynamic balancing of a spare rotor for a wind turbine, characterized in that, The device includes a rotor and a rotor storage platform on the ground. The rotor includes a rotor shaft and a rotor impeller. Rotor bearings are installed on the journals at both ends of the rotor shaft, and one end of the rotor shaft extends out of the rotor bearing for connection with a coupling. The end face of the shaft head at one end of the rotor shaft is provided with a rotor rotation mark. Two rotor supports are spaced apart on the rotor storage platform. The top of the rotor supports is provided with a rotor shaft bracket for supporting the rotor shaft. A hydraulic lifter base is provided on the rotor storage platform outside the two rotor supports. A hydraulic lifter is provided on the hydraulic lifter base. The top of the hydraulic lifter is provided with a rotor bearing bracket. The rotor bearing bracket supports and disengages the rotor bearing by raising and lowering the hydraulic lifter.

2. The storage device for achieving dynamic balancing of a spare fan rotor according to claim 1, characterized in that, The rotor bearing bracket is semi-circular, and the inner diameter of the rotor bearing bracket is matched with the outer diameter of the rotor bearing so that the contact surface between the rotor bearing bracket and the rotor bearing is in harmony. Furthermore, an elastic rubber pad is provided on the contact surface between the rotor bearing and the bearing bracket.

3. The storage device for achieving dynamic balancing of a spare fan rotor according to claim 1, characterized in that, The rotor shaft bracket is semi-circular, and the inner diameter of the rotor shaft bracket is matched with the outer diameter of the rotor shaft so that the contact surfaces of the rotor shaft bracket and the rotor shaft match. Furthermore, the contact surfaces between the rotor shaft bracket and the rotor shaft are provided with elastic rubber pads.

4. The storage device for achieving dynamic balancing of a spare fan rotor according to claim 1, characterized in that, The rotor rotation indicator is installed on the end face of the coupling connection end of the rotor shaft, and is used to indicate the direction and angle of rotation when the rotor is rotated by a turning wheel for dynamic balancing maintenance while it is stationary.

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