Thrust disc assembly capable of adjusting dynamic balance, rotor and steam turbine
By detachably installing counterweights in the annular groove of the thrust plate, the problem of rotor imbalance in large equipment is solved, enabling quick and convenient dynamic balance adjustment and avoiding any impact on equipment accuracy.
Patent Information
- Application Number
- CN202423170103.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In the existing technology, the problem of rotor imbalance in large equipment during long-term operation is difficult to solve quickly and conveniently. In particular, on-site grinding or reprocessing at the factory will affect the accuracy of the equipment and increase the difficulty of operation.
An adjustable dynamic balance thrust plate assembly is provided, including a thrust plate and a counterweight. The rotor imbalance is eliminated by detachably installing the counterweight in the annular groove of the thrust plate and adjusting the position of the counterweight in the annular groove without disassembling parts on the shaft.
It enables rapid elimination of rotor imbalance on-site, reduces assembly difficulty and time, avoids impacting equipment precision, and improves dynamic balancing efficiency.
Smart Images
Figure CN223498561U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of impeller rotor equipment technology, and in particular to a thrust disk. Background Technology
[0002] In mechanical equipment, rotor dynamic balancing is crucial and a core aspect of assembly, inspection, maintenance, and repair. Before leaving the factory, rotor dynamic balancing is typically ensured through parts machining and assembly quality. If a rotor dynamic balance problem is found, it is usually addressed by grinding the impeller to meet requirements. After leaving the factory, with long-term operation, internal wear occurs, generating new rotor imbalances and leading to abnormal rotor operation.
[0003] In the process of developing this utility model, the inventors discovered at least the following problems in the existing technology: Currently, if rotor imbalance occurs during the long-term operation of large equipment, the parts are either ground on-site or returned to the factory for processing, depending on the situation. However, the above methods are inconvenient to operate and time-consuming. On-site grinding is prone to damaging other parts, while factory processing requires disassembling the parts first, and when reassembling them after repair, the fit of the parts needs to be readjusted again. Taking the rotor in the turbine gearbox as an example, it is a large, high-pressure, precision device. If imbalance occurs during operation, whether on-site grinding or factory repair is performed, the accuracy of the turbine can easily be affected during the repair process. Utility Model Content
[0004] The purpose of this invention is to provide a thrust disk that can quickly eliminate rotor dynamic imbalance.
[0005] To achieve this objective, on the one hand, an adjustable dynamic balance thrust disk assembly is provided, including a thrust disk and a counterweight; an annular groove is provided on the side end face of the thrust disk, the width of the bottom of the annular groove is greater than the width of the opening, and an inlet hole is provided at the opening of the annular groove; the counterweight enters through the inlet hole, and the counterweight is detachably connected to the annular groove.
[0006] Furthermore, the counterweight is engaged and abuts against the annular groove.
[0007] Furthermore, the counterweight has a bolt hole at its center, and the counterweight is abutted against the annular groove by a set screw.
[0008] Furthermore, the plane of the counterweight that abuts against the bottom of the annular groove is chamfered, and the chamfer is larger than the angle between the bottom of the annular groove and the sidewall of the groove.
[0009] Furthermore, the counterweight includes a first counterweight and a second counterweight, wherein the weight of the first counterweight is greater than the weight of the second counterweight.
[0010] On the other hand, a rotor is also provided, including a shaft on which an adjustable dynamic balance thrust disk assembly is disposed.
[0011] On the other hand, a rotor is also provided, wherein the thrust disc is fixed to the rotating shaft by a retaining ring and a retaining sleeve.
[0012] Furthermore, the rotating shaft also includes a gear, and a set of thrust discs are provided at each end of the gear; the annular groove is located on the side opposite to the gear.
[0013] Furthermore, the rotating shaft also includes two sets of bearing positions, which are respectively located on the side of the thrust disc away from the gear, and the bearing positions are used to install bearings.
[0014] On the other hand, a steam turbine is also provided, including a gearbox, the gearbox containing any of the aforementioned rotors.
[0015] The adjustable dynamic balancing thrust plate assembly provided in this solution includes a thrust plate and a counterweight. An annular groove is provided on the side end face of the thrust plate, with the width of the groove bottom greater than the width of the groove opening. An inlet hole is provided at the opening of the annular groove, through which the counterweight enters. The counterweight is detachably connected within the annular groove. In this solution, the counterweight is used for weight adjustment on the thrust plate, and its position can be freely adjusted within the annular groove of the thrust plate. Therefore, this solution adjusts the dynamic imbalance on the shaft where the thrust plate is located by adjusting the position of the counterweight on the thrust plate. The above balancing adjustment process is performed on-site, and the imbalance on the shaft where the thrust plate is located can be quickly eliminated without disassembling any parts on the shaft.
[0016] The rotor provided by this solution includes a shaft on which the adjustable dynamic balancing thrust disk assembly is mounted. The dynamic imbalance of the rotor is eliminated by directly adjusting the position of the counterweight within the annular groove. Furthermore, this imbalance adjustment method does not require disassembly of rotor components and can be performed on-site, significantly reducing assembly difficulty and saving assembly time.
[0017] The turbine provided by this solution includes a gearbox, which includes the aforementioned rotor. The rotor shaft is equipped with the adjustable dynamic balance thrust disk assembly. By adjusting the position of the counterweight in the annular groove, the dynamic imbalance on the rotor in the turbine gearbox can be quickly eliminated on-site without the need for on-site grinding or disassembly of parts for return to the factory for repair. This reduces assembly difficulty, saves assembly time, and improves the efficiency of dynamic balance adjustment. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the adjustable dynamic balance thrust disk in Embodiment 1;
[0019] Figure 2 yes Figure 1 The view;
[0020] Figure 3 yes Figure 2 AA view;
[0021] Figure 4 yes Figure 2 BB view;
[0022] Figure 5 This is a schematic diagram of the structure of the first counterweight;
[0023] Figure 6 This is a schematic diagram of the second counterweight;
[0024] Figure 7 This is a schematic diagram of the rotor structure in Embodiment 2.
[0025] In the diagram: 110-Thrust plate; 111-Annular groove; 112-Inlet hole; 113-Set screw; 114-Sloping surface; 115-Through shaft hole; 120-Counterweight; 121-Chamfer; 122-Bolt hole; 131-First counterweight; 132-Second counterweight; 141-Snap ring; 142-Collar sleeve; 200-Gear; 300-Bearing seat. Detailed Implementation
[0026] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] Example 1:
[0030] like Figure 1 As shown, this embodiment provides an adjustable dynamic balance thrust disk assembly, including a thrust disk 110 and a counterweight 120. The thrust disk includes a disk-mounted base with a through-shaft hole 115 for mounting and connecting to a rotating shaft. An annular groove 111 is provided on the side end face of the thrust disk 110. The width of the bottom of the annular groove 111 is greater than the width of the opening. An inlet hole 112 is provided at the opening of the annular groove 111, through which the counterweight 120 enters. The counterweight 120 is detachably connected to the annular groove 111.
[0031] In this embodiment, the adjustable dynamic balancing thrust plate has a counterweight 120 used for weight adjustment on the thrust plate 110, and the counterweight 120 can be freely adjusted within the annular groove 111 of the thrust plate 110. Therefore, in this embodiment, the imbalance on the shaft where the thrust plate 110 is located is adjusted by adjusting the position of the counterweight 120 on the thrust plate 110. The above-mentioned balancing adjustment process is performed on-site, and the imbalance on the shaft where the thrust plate 110 is located can be quickly eliminated without disassembling any parts on the shaft.
[0032] like Figure 1 As shown, the annular groove is further defined as a circular ring. Furthermore, the annular groove 111 on the thrust disc is coaxially arranged with the through-shaft hole 115. Furthermore, the annular groove can also be other symmetrical shapes, such as a four-leaf clover shape, etc.
[0033] like Figure 1 As shown, further, two inlet holes 112 are provided. Preferably, the two inlet holes 112 are symmetrically arranged on the annular groove 111, which facilitates the placement of counterweights 120 at two positions on the thrust disk 110 when the thrust disk 110 rotates on the shaft at different times. Further, more than two inlet holes 112 can be provided, depending on the usage scenario of the counterweights 120.
[0034] like Figures 5-6As shown, the counterweight is a rotating body, and its external structural dimensions match the annular groove on the thrust plate to ensure that the counterweight can be placed into the annular groove without interference.
[0035] like Figure 1 As shown, further, the counterweight 120 is fitted and abuts against the annular groove 111 of the thrust plate 110. Preferably, the counterweight 120 has a bolt hole 122 at its center, and the counterweight 120 is abutted against the annular groove 111 by a set screw 113. In this embodiment, the counterweight 120 is fixed in the annular groove 111 of the thrust plate 110 by the set screw 113, and the set screw 113 contacts the bottom of the annular groove 111. As the set screw 113 is tightened, the counterweight is fixed to the bottom of the annular groove. The set screw 113 is a general standard part, which is convenient to use and replace. Compared with the prior art, this embodiment does not require a threaded hole at the bottom of the annular groove, so that the counterweight in this embodiment can be steplessly adjusted in the annular groove, and there is no positional limitation of the counterweight in the annular groove. Therefore, the position and number of the counterweight in this embodiment can be selected as needed.
[0036] Furthermore, the plane of the counterweight 120 that abuts against the bottom of the annular groove 111 is provided with a chamfer 121. The chamfer 121 is larger than the angle between the bottom of the annular groove 111 and the side wall of the groove, which facilitates the stepless adjustment of the position of the counterweight 120 in the annular groove 111 and makes the adjustment highly operable.
[0037] Furthermore, such as Figures 5-6 As shown, to facilitate fine-tuning, the counterweights in this embodiment have different specifications, and the different counterweights have different weights. By arranging counterweights of different specifications in the annular groove of the thrust plate, the effect of precise weight selection is achieved.
[0038] Preferred, such as Figures 5-6 As shown, the counterweight 120 includes a first counterweight 131 and a second counterweight 132. The thickness of the first counterweight 131 is greater than the thickness of the second counterweight 132. The mass of the counterweight 120 is adjusted by adjusting the thickness of the counterweight 120.
[0039] Furthermore, an annular groove 111 is provided on one side end face of the thrust plate 110, and a ramp surface 114 is provided on the other side end face. The slope of the ramp surface 114 is between 1° and 2°. Providing a ramp surface on the thrust plate 110 makes it easier to install the thrust plate 110 on the rotating shaft and avoids interference with other structures on the rotating shaft.
[0040] Therefore, in this embodiment, the adjustable dynamic balance thrust disk assembly has a counterweight detachably connected to the annular groove of the thrust disk. By changing the number, position, and specifications of the counterweight, the rotor's dynamic balance can be achieved, solving the rotor's dynamic imbalance problem. Furthermore, it can be debugged on-site without disassembling the thrust disk or removing components from the shaft, thus not affecting the fitting accuracy of the shaft parts or causing damage to the shaft or its components. Therefore, the thrust disk assembly of this solution can be directly operated on the shaft assembly, greatly reducing assembly difficulty and saving assembly time.
[0041] Example 2:
[0042] like Figure 7 As shown, this embodiment provides a rotor, including a shaft, on which an adjustable dynamic balancing thrust disc as described in any of Embodiment 1 is disposed. Because the rotor of this embodiment is equipped with the adjustable dynamic balancing thrust disc of Embodiment 1, the dynamic imbalance of the rotor can be eliminated by adjusting the position of the counterweight 120 within the annular groove 111. Furthermore, the above-mentioned imbalance adjustment method does not require disassembly of the rotor components and can be adjusted on-site.
[0043] Furthermore, the thrust disc 110 is fixed to the rotating shaft by a retaining ring 141 and a retaining sleeve 142.
[0044] Furthermore, the rotating shaft also includes a gear 200, with a set of thrust discs 110 at each end of the gear 200, and an annular groove 111 located on the side opposite to the gear 200.
[0045] Furthermore, the rotating shaft also includes two sets of bearing seats 300, which are respectively located on the side of the thrust plate 110 away from the gear 200. The bearing seats 300 are used to install bearings.
[0046] This embodiment also provides a steam turbine, including a gearbox, the gearbox including the rotor described above.
[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An adjustable dynamically balanced thrust disk assembly, characterized in that, Includes thrust plate and counterweight; An annular groove is provided on the side end face of the thrust plate. The width of the bottom of the annular groove is greater than the width of the opening. An inlet hole is provided at the opening of the annular groove. The counterweight enters through the inlet hole and is detachably connected to the annular groove.
2. The adjustable dynamically balanced thrust disk assembly according to claim 1, characterized in that, The counterweight is fitted and abuts against the annular groove.
3. The adjustable dynamically balanced thrust disk assembly according to claim 2, characterized in that, The counterweight has a bolt hole at its center, and the counterweight is abutted against the annular groove by a set screw.
4. The adjustable dynamically balanced thrust disk assembly according to claim 1, characterized in that, The counterweight has a chamfered surface on the plane that abuts against the bottom of the annular groove, and the chamfer is larger than the angle between the bottom of the annular groove and the side wall of the groove.
5. The adjustable dynamically balanced thrust disk assembly according to claim 1, characterized in that, The counterweight includes a first counterweight and a second counterweight, wherein the weight of the first counterweight is greater than the weight of the second counterweight.
6. A rotor, characterized in that, It includes a rotating shaft on which an adjustable dynamic balance thrust disk assembly as described in any one of claims 1-5 is disposed.
7. The rotor according to claim 6, characterized in that, The thrust disc is fixed to the rotating shaft by a retaining ring and a retaining sleeve.
8. The rotor according to claim 6, characterized in that, The rotating shaft also includes a gear, and a set of thrust disks are provided at each end of the gear; the annular groove is located on the side opposite to the gear.
9. The rotor according to claim 8, characterized in that, The rotating shaft also includes two sets of bearing positions, which are respectively located on the side of the thrust plate away from the gear. The bearing positions are used to install bearings.
10. A steam turbine, comprising a gearbox, characterized in that, The gearbox includes the rotor as described in any one of claims 5-9.