Detachable guide vane locking device with manual and hydraulic double locking function, guide vane and tubular turbine of water turbine

Abstract

The utility model relates to water turbine technical field discloses detachable tubular water turbine guide vane locking device, water turbine guide vane and tubular water turbine with manual and hydraulic double locking function, the locking device includes the manual locking plate set up on the locking hole end face and installs the locking support on the guide vane outer ring, is provided with the locking cylinder on the locking support, the locking cylinder has the locking pin reciprocating in the locking cylinder in, the end of locking cylinder has the opening for the locking pin to pass through, the locking pin is cooperated with the locking hole, realizes water turbine guide vane hydraulic lock; The manual locking plate is equipped with through -hole, and the through -hole has locking bolt, the end surface of locking pin is provided with the locking screw hole of adapting with locking bolt, and locking pin is cooperated with locking bolt, realizes water turbine guide vane manual lock. The utility model will lock the support and combine on the guide vane outer ring, realizes the separation of locking support and runner chamber, and the locking device is detachable, not only is convenient for overhauling and simplifies runner chamber structure.

Description

Technical Field

[0001] This utility model relates to the field of water turbine technology, and more specifically to a detachable cross-flow water turbine guide vane locking device with manual and hydraulic dual locking functions, water turbine guide vanes, and cross-flow water turbine. Background Technology

[0002] As the core equipment of low-head hydropower generation, the safe locking of the guide vanes in a axial-flow turbine is a crucial aspect ensuring the safe operation of the unit. Existing locking devices for the guide vane mechanism control ring of axial-flow turbines are divided into two types: hydraulic locking and manual locking. To prevent guide vane rotation caused by accidental operation of the relay when the guide vanes are fully open or fully closed, at least one type of locking device is required. Typically, for ease of operation, a hydraulic locking device for the guide vane mechanism is preferred.

[0003] For example, the utility model patent CN218093295U proposes a guide vane relay locking structure in which the relative position of the locking pin and the locking cylinder is hydraulically controlled, enabling the locking pin to engage with the fully open or fully closed locking hole of the control ring, thereby achieving the function of locking the relay. However, in practical applications, to prevent accidental operation of the hydraulic locking control system of the locking device, some power plants propose adding a manual locking device. In existing technology, the locking cylinder is directly fitted onto the runner chamber flange. Therefore, to simultaneously provide both hydraulic and manual locking functions, two "ears" need to extend from the runner chamber flange to accommodate one hydraulic locking device and one manual locking device, making the structure more complex and hindering installation, inspection, and maintenance. Summary of the Invention To address the problems and shortcomings of existing turbine guide vane locking devices, such as complex structure, insufficient locking reliability, and inconvenient maintenance, this utility model proposes a detachable cross-flow turbine guide vane locking device, turbine guide vanes, and cross-flow turbine with both manual and hydraulic locking functions.

[0004] To achieve the aforementioned objectives of this utility model, the specific technical solution is as follows: This utility model discloses a detachable guide vane locking device for a cross-flow turbine with both manual and hydraulic locking functions. The locking device includes a manual locking plate disposed on the locking hole end face of the control ring and a locking bracket mounted on the outer ring of the guide vane. The locking bracket is provided with a locking cylinder, and the locking cylinder has a locking pin that reciprocates within the locking cylinder. The side of the locking cylinder facing the control ring has an opening coaxial with the locking hole, through which the end of the locking pin passes. The locking pin cooperates with the locking hole to achieve hydraulic locking of the turbine guide vane. The manual locking plate has a through hole, in which a locking bolt is disposed. The end face of the locking pin has a locking screw hole adapted to the locking bolt. The locking pin cooperates with the locking bolt to achieve manual locking of the turbine guide vane.

[0005] Preferably, the locking hole of the control ring is provided with an eccentric sleeve that cooperates with the locking pin.

[0006] Preferably, the locking pin cooperates with the locking bolt to achieve manual locking of the turbine guide vanes, and the gap between the manual locking plate and the end face of the locking pin is 5mm.

[0007] Preferably, the locking bracket is fixed to the outer ring of the guide vane by a locking bolt.

[0008] Preferably, the locking bracket and the outer ring of the guide vane are respectively provided with corresponding pin holes. After the turbine guide vane is locked, a fixing pin is inserted into the two coaxial pin holes on the locking bracket and the outer ring of the guide vane.

[0009] Preferably, the locking pin and the locking cylinder are fitted with a double guide ring and a stepped ring.

[0010] Preferably, the locking hole includes a fully open locking hole and a fully closed locking hole. The locking pin cooperates with the fully open locking hole to achieve maintenance locking; the locking pin cooperates with the fully closed locking hole to achieve shutdown locking.

[0011] On the other hand, based on the same inventive concept, this utility model also discloses a water turbine guide vane, which has the guide vane locking device described above.

[0012] Furthermore, based on the same inventive concept, this utility model also discloses a cross-flow turbine, which has the guide vane locking device described above.

[0013] The beneficial effects of this utility model are: 1. The detachable guide vane locking device for a cross-flow turbine with both manual and hydraulic locking functions provided by this utility model has a manual locking plate welded to the end face of the locking hole of the control ring, and a mounting hole corresponding to the center screw hole of the locking pin is opened in the center. After the locking pin is inserted into the locking hole by the hydraulic locking control system, the manual locking plate and the locking pin are fixed together by manually tightening the locking bolt. This realizes that a locking device has both manual and hydraulic locking functions at the same time, effectively preventing locking failure caused by misoperation of the hydraulic locking control system. 2. The detachable guide vane locking device for a cross-flow turbine with both manual and hydraulic locking functions provided by this utility model completely separates the locking bracket from the runner chamber. The device is secured to the outer ring of the guide vane by bolts and pins, thus achieving a detachable locking mechanism. In case of malfunction, the locking device can be removed for repair. Furthermore, the runner chamber flange does not require large lugs, simplifying the runner chamber structure and facilitating its installation and maintenance.

[0014] 3. The detachable cross-flow turbine guide vane locking device with manual and hydraulic dual locking functions provided by this utility model adopts a combination of double guide rings and shaft stepped rings for locking pin sealing, which makes the locking pin locking and unlocking more stable and effectively prevents the seal from being scratched. 4. This utility model incorporates an eccentric sleeve within the locking hole of the control ring. This sleeve allows for flexible adjustment of its relative position to the locking hole within a certain range, eliminating deviations caused by insufficient manufacturing or installation precision. This corrects the insertion path of the locking pin, ensuring proper assembly of the entire locking device. Furthermore, the eccentric sleeve's adjustable characteristics maintain a consistent fit with the locking hole of the control ring, effectively preventing jamming or uneven wear of the locking pin and locking hole due to control ring displacement. This not only helps maintain the stable locking function of the locking device but also significantly extends the service life of the locking pin, locking hole, and eccentric sleeve themselves, reducing the frequency of equipment failures, lowering maintenance costs, and ensuring the long-term stable operation of the turbine.

[0015] 5. After the hydraulic locking control system of this utility model controls the locking pin to be inserted into the locking hole to achieve hydraulic locking, the gap between the end face of the locking pin and the manual locking plate is controlled at about 5mm. This ensures a good locking effect and prevents the locking pin from colliding with the manual locking plate, which could damage the manual locking plate and cause the manual locking function of the locking device to fail. Attached Figure Description

[0016] The foregoing and hereinafter detailed description of this utility model becomes clearer when read in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the turbine guide vane locking device of this utility model; Figure 2 for Figure 1 Top view; Figure 3 for Figure 1 Enlarged view of section I in the middle. In the picture: 1. Eccentric sleeve; 2. Manual locking plate; 3. Locking bolt; 4. Control ring; 5. Guide vane outer ring; 6. Rotor chamber; 7. Engagement bolt; 8. Locking bracket; 9. Locking pin; 10. Locking cylinder; 11. Guide ring; 12. Stepped ring; 13. Locking hole; 14. Fixing pin. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of this utility model, the following will further illustrate the technical solutions for achieving the purpose of this utility model through several specific embodiments. It should be noted that the technical solutions claimed by this utility model include, but are not limited to, the following embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this utility model.

[0018] The present invention will be explained and described in more detail below with reference to specific implementation methods.

[0019] Example 1 As a basic implementation, this embodiment provides a detachable guide vane locking device for a cross-flow turbine with both manual and hydraulic locking functions. Figure 1 This is a schematic diagram of the turbine guide vane locking device. Figure 1 As shown, the guide vane locking device consists of a locking bracket 8 mounted on the outer ring 5 of the guide vane, a locking cylinder 10 mounted on the locking bracket 8, and a locking pin 9 slidably mounted within the locking cylinder 10. The outer ring 5 of the guide vane is connected to a control ring 4 via a steel ball. The control ring 4 is provided with a locking hole 13 that mates with the locking pin 9. Under the action of the hydraulic locking control system, the locking pin 9 can reciprocate within the cylinder of the locking cylinder 10, and the locking cylinder 10 has an opening on the side facing the control ring 4 for the end of the locking pin 9 to pass through. The hydraulic locking control system controls the locking pin 9 in the locking cylinder 10 to move toward the locking hole 13 on the control ring 4. The end of the locking pin 9 passes through the opening of the locking cylinder 10 and enters the locking hole 13. The locking pin 9 cooperates with the locking hole 13 to realize the hydraulic locking of the turbine guide vanes in the maintenance state or the shutdown state, and prevent the turbine guide vanes from rotating due to misoperation of the relay.

[0020] The locking bracket 8 is fixed to the outer ring 5 of the guide vane by a locking bolt, and the locking cylinder 10 is fixed to the locking bracket 8 by a locking bolt.

[0021] Furthermore, to prevent the hydraulic locking control system from malfunctioning and causing the hydraulic locking to fail, in this embodiment, a manual locking plate 2 is also provided on the end face of the locking hole 13 of the control ring 4. The manual locking plate 2 is welded and fixed to the control ring 4. The manual locking plate 2 has a through hole, and a locking bolt 3 is provided in the through hole. The end face of the locking pin 9 is provided with a locking screw hole that matches the locking bolt 3. After the hydraulic locking control system drives the end of the locking pin 9 through the opening of the locking cylinder 10 and into the locking hole 13, the locking bolt 3 on the manual locking plate 2 is screwed in. The locking bolt 3 enters the locking screw hole on the end face of the locking pin 9 and is tightened, fixing the manual locking plate 2 and the locking pin 9 together. The locking pin 9 and the locking bolt 3 cooperate to realize the manual locking of the turbine guide vanes.

[0022] In the embodiments described in this utility model, the turbine guide vanes are dually locked in either the maintenance or shutdown state through the above two locking methods (hydraulic locking + manual locking). The locking device of this utility model has both manual and hydraulic dual locking functions, effectively preventing locking failure caused by misoperation of the hydraulic locking control system.

[0023] Furthermore, the hydraulic locking structure, consisting of the locking bracket 8, locking cylinder 10, and locking pin 9, is bolted to the outer ring 5 of the guide vane, achieving a detachable locking device. In case of a malfunction, the locking device can be removed for maintenance. Moreover, this structure is completely separate from the turbine runner chamber, eliminating the need for large lugs in the runner chamber's flange, thus simplifying its structure and facilitating installation and maintenance.

[0024] In the embodiments described in this utility model, the locking holes 13 provided on the control ring 4 include two types: fully open locking holes and fully closed locking holes. During maintenance, the guide vanes need to be fully open and locked. The guide vane relay drives the control ring 4 to rotate around the centerline of the turbine unit on the outer water distribution ring until the fully open locking hole on the control ring 4 is aligned with the center of the locking pin 9 on the locking bracket 8. Then, the hydraulic locking control system controls the end of the locking pin 9 to enter the fully open locking hole, thus locking the control ring 4. The locking pin 9 cooperates with the fully open locking hole to achieve maintenance locking and prevent accidental closure. When the turbine stops, the guide vanes need to be fully closed and locked. The guide vane relay drives the control ring 4 to rotate around the center line of the turbine unit on the outer water distribution ring until the center of the fully closed locking hole on the control ring 4 is aligned with the center of the locking pin 9 on the locking bracket 8. Then the hydraulic locking control system controls the end of the locking pin 9 to enter the fully closed locking hole, and the locking pin 9 locks the control ring 4. The locking pin 9 and the fully closed locking hole cooperate to achieve shutdown locking and prevent accidental opening.

[0025] Example 2 In a preferred embodiment of this utility model, based on embodiment 1, an eccentric sleeve 1 that cooperates with the locking pin 9 is provided in the locking hole 13 of the control ring 4. The eccentric sleeve 1 is fitted into the locking hole 13, which can flexibly adjust the relative positional relationship with the locking hole within a certain range, eliminate the influence of deviation caused by insufficient manufacturing and installation precision, correct the insertion path of the locking pin 9, and ensure the normal assembly of the entire locking device. Furthermore, the locking pin 9 cooperates with the locking bolt 3 to achieve manual locking of the turbine guide vanes. When the hydraulic locking control system controls the end of the locking pin 9 to be fully inserted into the locking hole 13 (end inserted into the locking hole 13), in order to avoid the locking pin 9 hitting the manual locking plate 2 provided on the end face of the locking hole 13, the gap between the end face of the locking pin 9 and the manual locking plate 2 is limited to 5mm after the end of the locking pin 9 is inserted into the locking hole 13.

[0026] Furthermore, to prevent the locking device from moving, corresponding pin holes are provided on the locking bracket 8 and the outer ring 5 of the guide vane. After the turbine guide vane is locked, a fixing pin 14 is inserted into the two coaxial pin holes on the locking bracket 8 and the outer ring 5 of the guide vane to achieve the locking and positioning effect of the locking device, which can effectively prevent the locking device from moving.

[0027] Furthermore, a guide ring 11 and a stepped ring 12 for the hole are provided between the locking pin 9 and the inner wall of the locking cylinder 10. The combination of the guide ring 11 and the stepped ring 12 not only achieves a seal between the locking pin 9 and the locking cylinder 10, but also makes the reciprocating motion of the locking pin 9 more stable, effectively preventing the seal from being scratched. In addition, the number of guide rings 11 is at least two.

[0028] Example 3 This embodiment provides a guide vane for a cross-flow turbine, wherein the turbine guide vane has the guide vane locking device described in any of the above embodiments.

[0029] Example 4 This embodiment provides a axial-flow turbine, which has the guide vane locking device described in any of the embodiments described in Embodiment 1 above.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A detachable guide vane locking device for a transverse-flow turbine with both manual and hydraulic locking functions, characterized in that, The system includes a manual locking plate (2) on the end face of the locking hole (13) of the control ring (4) and a locking bracket (8) installed on the outer ring (5) of the guide vane. The locking bracket (8) is provided with a locking cylinder (10). The locking cylinder (10) has a locking pin (9) that reciprocates in the locking cylinder (10). The side of the locking cylinder (10) facing the control ring (4) is provided with an opening coaxial with the locking hole (13) for the end of the locking pin (9) to pass through. The locking pin (9) cooperates with the locking hole (13) to realize the hydraulic locking of the turbine guide vane. The manual locking plate (2) is provided with a through hole and a locking bolt (3) is provided in the through hole. The end face of the locking pin (9) is provided with a locking screw hole that is adapted to the locking bolt (3). The locking pin (9) cooperates with the locking bolt (3) to realize the manual locking of the turbine guide vane.

2. The detachable guide vane locking device for a transverse-flow turbine with both manual and hydraulic locking functions as described in claim 1, characterized in that, An eccentric sleeve (1) that cooperates with the locking pin (9) is provided in the locking hole (13) of the control ring (4).

3. The detachable guide vane locking device for a transverse-flow turbine with both manual and hydraulic locking functions as described in claim 1, characterized in that, The locking pin (9) cooperates with the locking bolt (3) to realize the manual locking of the turbine guide vane, and the gap between the manual locking plate (2) and the end face of the locking pin is 5mm.

4. The detachable guide vane locking device for a transverse-flow turbine with both manual and hydraulic locking functions as described in claim 1, characterized in that, The locking bracket (8) is fixed to the outer ring (5) of the guide vane by a locking bolt.

5. The detachable guide vane locking device for a transverse-flow turbine with both manual and hydraulic locking functions as described in claim 1, characterized in that, The locking bracket (8) and the outer ring of the guide vane (5) are respectively provided with corresponding pin holes. After the turbine guide vane is locked, a fixing pin (14) is inserted into the two coaxial pin holes on the locking bracket (8) and the outer ring of the guide vane (5).

6. The detachable guide vane locking device for a transverse-flow turbine with both manual and hydraulic locking functions as described in claim 1, characterized in that, A guide ring (11) and a stepped ring (12) are provided at the mating point between the locking pin (9) and the locking cylinder (10).

7. The detachable cross-flow turbine guide vane locking device with both manual and hydraulic locking functions according to claim 6, characterized in that, The number of guide rings (11) is at least two.

8. The detachable guide vane locking device for a transverse-flow turbine with both manual and hydraulic locking functions as described in claim 1, characterized in that, The locking hole (13) includes a fully open locking hole and a fully closed locking hole. The locking pin (9) cooperates with the fully open locking hole to achieve maintenance locking; the locking pin (9) cooperates with the fully closed locking hole to achieve shutdown locking.

9. A water turbine guide vane, characterized in that, The turbine guide vane has a turbine guide vane locking device as described in any one of claims 1-8.

10. A type of axial-flow turbine, characterized in that, The axial-flow turbine has the turbine guide vane locking device as described in any one of claims 1-8.

Images