Turbine impeller balance hole adjusting device
By designing an adjustable turbine impeller balance hole adjustment device, the problem of reduced balancing effect caused by traditional fixed hole diameter was solved, dynamic hole diameter adjustment was achieved, improving operational stability and reducing maintenance costs.
Patent Information
- Application Number
- CN202520682859.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Traditional steam turbine impellers have fixed-diameter balance holes that cannot be adjusted according to changes in pressure conditions, resulting in a decrease in balancing performance. Furthermore, replacing the impeller is costly and time-consuming.
An adjustment device including a hole position adjuster and a balance hole module was designed. Through modular design and threaded connection, dynamic hole diameter and position adjustment of the balance hole can be achieved. The device is made of nickel-based high-temperature alloy and coated with an anti-oxidation coating to enhance durability.
It improves the operational stability of the steam turbine, reduces maintenance costs and downtime, and enhances the efficiency and practicality of impeller replacement.
Smart Images
Figure CN223781490U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of turbine impeller auxiliary devices, and in particular to a turbine impeller balance hole adjustment device. Background Technology
[0002] As is well known, in thermal power generating units, the steam turbine is the core equipment that converts the thermal energy of steam into mechanical energy, and its operating efficiency directly affects the overall performance of the generating unit. The turbine impeller, as a key component of the rotor, withstands enormous steam pressure and centrifugal force during high-speed rotation. Due to the uneven distribution of steam pressure before and after the impeller, balancing holes are usually opened on the impeller to balance the pressure difference, reduce axial thrust, thereby reducing bearing load and improving operational stability.
[0003] However, traditional balancing holes have a fixed diameter, and once the pressure conditions change, the diameter cannot be adjusted, resulting in a decrease in balancing effect. If you want to change the diameter of the hole on the impeller, you can only replace the impeller, which will increase costs and take a long time to replace the impeller, thus making it impractical. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a balance hole adjustment device that can quickly adjust the hole diameter, thereby improving the efficiency of impeller replacement and reducing costs, thus enhancing the practicality of a steam turbine impeller balance hole adjustment device.
[0005] This utility model discloses a turbine impeller balance hole adjustment device, comprising turbine blades; characterized in that it further comprises a hole position adjuster and a balance hole module, wherein the front end of the turbine blade is provided with an installation groove, the rear end of the installation groove is provided with a first through groove, the hole position adjuster is slidably fitted with the first through groove, the front end of the hole position adjuster 2 is provided with a second through groove, the second through groove is slidably fitted with the balance hole module 3, the hole position adjuster is connected to the installation groove through an installation component, and the hole position adjuster is fixed to the balance hole module by fixing components at the left and right ends, the balance hole module is provided with a balance hole at the front end.
[0006] Preferably, the mounting assembly includes a mounting ring and four sets of screws. The outer wall of the hole position adjuster is fitted and connected to the mounting ring. The front end of the mounting ring is provided with four sets of mounting through holes, and the front end of the mounting groove is provided with four sets of mounting threaded holes. The four sets of screws pass through the mounting through holes and are threadedly connected to the mounting threaded holes respectively.
[0007] Preferably, the mounting assembly includes a mounting ring and four sets of screws. The outer wall of the hole position adjuster is fitted and connected to the mounting ring. The front end of the mounting ring is provided with four sets of mounting through holes, and the front end of the mounting groove is provided with four sets of mounting threaded holes. The four sets of screws pass through the mounting through holes and are threadedly connected to the mounting threaded holes respectively.
[0008] Preferably, a sealing gasket is provided at the rear end of the mounting ring.
[0009] Preferably, the outer wall of the balance hole module is provided with a groove, and the groove slides and fits with the sealing ring.
[0010] Preferably, all four sets of mounting through holes are countersunk holes.
[0011] Preferably, the hole position adjuster, the balance hole module, and the mounting ring are all made of nickel-based high-temperature alloy.
[0012] Preferably, the outer walls of the orifice position adjuster, the adjustment module, and the mounting ring are coated with an anti-oxidation coating.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By cooperating with the orifice position adjuster and the balance orifice module, this utility model can dynamically adjust the orifice diameter or position of the balance orifice according to the actual working conditions, optimize the axial thrust balance effect, improve the turbine operation stability, and avoid the efficiency reduction problem caused by the traditional fixed orifice diameter. In addition, this utility model adopts a modular design, and the balance orifice module can be independently disassembled and installed without replacing the entire impeller, which greatly reduces maintenance costs and shortens downtime, improves the unit availability, thereby improving the efficiency of impeller replacement and reducing costs, thus enhancing practicality. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the connection structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the connection structure between the hole position adjuster and the mounting ring of this utility model;
[0016] Figure 3 This is a schematic diagram of the mounting ring and sealing gasket tightly attached structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the tightly fitted structure of the balance hole module and sealing ring assembly of this utility model;
[0018] The following are labels in the attached diagram: 1. Turbine blade; 2. Hole position adjuster; 3. Balance hole module; 4. Mounting ring; 5. Screw; 6. Lead screw; 7. Sealing gasket; 8. Sealing ring. Detailed Implementation
[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0020] like Figures 1 to 4As shown, the turbine impeller balance hole adjustment device of this utility model includes a turbine blade 1; its characteristic is that it also includes a hole position adjuster 2 and a balance hole module 3. The front end of the turbine blade 1 is provided with an installation groove, and the rear end of the installation groove is provided with a first through groove. The hole position adjuster 2 is slidably fitted with the first through groove. The hole position adjuster 2 is connected to the installation groove through an installation component. The front end of the hole position adjuster 2 is provided with a second through groove, which is slidably fitted with the balance hole module 3. The hole position adjuster 2 adjusts the balance hole module 3 through fixing components at its left and right ends. The front end of the fixed balance hole module 3 is provided with a balance hole. Through the cooperation of the hole position adjuster and the balance hole module, this utility model can dynamically adjust the diameter or position of the balance hole according to the actual working conditions, optimize the axial thrust balance effect, improve the turbine operation stability, avoid the efficiency reduction problem caused by the traditional fixed hole diameter, and adopt a modular design. The balance hole module can be disassembled and installed independently without replacing the entire impeller, which greatly reduces maintenance costs and shortens downtime, improves the unit availability, thereby improving the efficiency of impeller replacement and reducing costs, thus enhancing practicality.
[0021] As a preferred embodiment of the above, the mounting assembly includes a mounting ring 4 and four sets of screws 5. The outer wall of the orifice position adjuster 2 is fitted and connected to the mounting ring 4. The front end of the mounting ring 4 is provided with four sets of mounting through holes, and the front end of the mounting groove is provided with four sets of mounting threaded holes. The four sets of screws 5 pass through the mounting through holes and are threadedly connected to the mounting threaded holes respectively. The orifice position adjuster can be fixedly connected to the turbine blades by the mounting ring and the four sets of screws, thereby facilitating the installation and disassembly of the orifice position adjuster and enhancing its practicality.
[0022] As a preferred embodiment of the above, the fixing component includes two sets of lead screws 6. The left and right ends of the hole position adjuster 2 are respectively provided with first through threaded holes, and the left and right ends of the balance hole module 3 are respectively provided with first threaded holes. The two sets of lead screws 6 are threadedly connected to the first through threaded holes and the first threaded holes, respectively. The outer ends of the two sets of lead screws 6 are respectively provided with cross grooves. The hole position adjuster and the balance hole module can be fixed by the two sets of lead screws, thereby enhancing practicality.
[0023] As a preferred embodiment of the above, a sealing gasket 7 is provided at the rear end of the mounting ring 4; the sealing gasket can enhance the sealing between the mounting ring and the mounting groove, prevent air leakage during practical use from causing impeller imbalance, and thus enhance practicality.
[0024] As a preferred embodiment, the outer wall of the balance hole module 3 is provided with a groove, and the groove and the sealing ring 8 are slidably fitted together; the sealing ring strengthens the sealing box between the hole module and the second through groove, thereby enhancing practicality.
[0025] As a preferred embodiment of the above, all four sets of mounting through holes are countersunk holes; the four sets of screws can be hidden through the countersunk holes, thereby enhancing practicality.
[0026] As a preferred embodiment of the above, the hole position adjuster 2, the balance hole module 3 and the mounting ring 4 are all made of nickel-based high-temperature alloy. Nickel-based high-temperature alloy has excellent high strength, oxidation resistance and creep resistance, and it also has good hardness and corrosion resistance, thereby enhancing its practicality.
[0027] As a preferred embodiment, the outer walls of the hole position adjuster 2, the adjustment module, and the mounting ring 4 are coated with an anti-oxidation coating. The anti-oxidation coating can effectively delay high-temperature oxidation, resist thermal stress, improve thermal fatigue resistance, and enhance erosion resistance, thereby increasing the service life of the hole position adjuster 2, the adjustment module, and the mounting ring 4, and thus enhancing practicality.
[0028] The working principle of this utility model of a turbine impeller balance hole adjustment device is as follows: When the balance hole on the impeller is unbalanced and it is necessary to change the diameter of the balance hole on the impeller, the hole position adjuster on the impeller is removed by using four sets of screws. Then, a Phillips screwdriver is used to drive two sets of lead screws to rotate in opposite directions to disconnect the hole position adjuster from the balance hole module. After that, the balance hole module is replaced, and then the Phillips screwdriver is used again to drive the two sets of lead screws to rotate clockwise to fix the hole position adjuster and the balance hole module. Finally, the hole position adjuster and the mounting ring are fixed in the mounting groove by four sets of screws, and then the turbine can be resumed to normal operation.
[0029] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this article are for illustrative purposes only.
[0030] In this utility model, the terms "first," "second," and "third" do not represent a specific quantity or order, but are merely used to distinguish names.
[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A turbine impeller balance hole adjustment device, comprising turbine blades (1); characterized in that, It also includes a hole position adjuster (2) and a balance hole module (3). The front end of the turbine blade (1) is provided with an installation groove, and the rear end of the installation groove is provided with a first through groove. The front end of the hole position adjuster (2) is provided with a second through groove. The second through groove and the balance hole module (3) are slidably fitted together. The hole position adjuster (2) is slidably fitted together with the first through groove. The hole position adjuster (2) is connected to the installation groove through an installation component. The hole position adjuster (2) is fixed to the balance hole module (3) through the fixing components at the left and right ends. The front end of the balance hole module (3) is provided with a balance hole.
2. The turbine impeller balance hole adjustment device as described in claim 1, characterized in that, The mounting assembly includes a mounting ring (4) and four sets of screws (5). The outer wall of the hole position adjuster (2) is fitted and connected to the mounting ring (4). The front end of the mounting ring (4) is provided with four sets of mounting through holes, and the front end of the mounting groove is provided with four sets of mounting threaded holes. The four sets of screws (5) pass through the mounting through holes and are threadedly connected to the mounting threaded holes respectively.
3. The turbine impeller balance hole adjustment device as described in claim 2, characterized in that, The fixing assembly includes two sets of lead screws (6), the left and right ends of the hole position adjuster (2) are respectively provided with first through threaded holes, the left and right ends of the balance hole module (3) are respectively provided with first threaded holes, the two sets of lead screws (6) are respectively threadedly connected to the first through threaded holes and the first threaded holes, and the outer ends of the two sets of lead screws (6) are respectively provided with cross grooves.
4. The turbine impeller balance hole adjustment device as described in claim 3, characterized in that, A sealing gasket (7) is provided at the rear end of the mounting ring (4).
5. The turbine impeller balance hole adjustment device as described in claim 4, characterized in that, The outer wall of the balance hole module (3) is provided with a groove, and the groove slides and the sealing ring (8) together.
6. The turbine impeller balance hole adjustment device as described in claim 5, characterized in that, All four sets of mounting through holes are countersunk holes.
7. The turbine impeller balance hole adjustment device as described in claim 6, characterized in that, The orifice position adjuster (2), the balance orifice module (3), and the mounting ring (4) are all made of nickel-based high-temperature alloy.
8. The turbine impeller balance hole adjustment device as described in claim 7, characterized in that, The outer walls of the orifice position adjuster (2), the balance orifice module (3), and the mounting ring (4) are coated with an anti-oxidation coating.