A new type of water turbine runner oil discharge device

Abstract

This utility model belongs to the field of water turbine technology, and in particular to a novel oil draining device for a water turbine runner. It includes an oil draining device fixedly installed in the flow channel, comprising a spring plug. A plug plate detachably installed on the runner cylinder seals the oil drain port of the spring plug. The key feature is that a control rod is slidably connected to the inner side of the plug plate located in the oil drain coverage area of ​​the spring plug. The control rod is a tubular structure with one closed end, located inside the spring plug. A limiting plate is provided at the inner end of the control rod, and a sealing ring B seals the inner surface of the limiting plate and the plug plate. When the limiting plate is in sealing mode, the oil drain hole on the control rod is covered by the plug plate. It is not necessary to remove the countersunk screws on the plug plate; simply pushing the control rod upwards separates the sealing plug from the sealing ring, thus preventing direct oil leakage and avoiding the need to remove multiple countersunk screws. The operation is convenient and clean.

Description

Technical Field

[0001] This utility model belongs to the field of water turbine technology, specifically relating to a novel water turbine runner oil discharge device. Background Technology

[0002] The runner of an axial-flow propeller turbine is filled with a large amount of turbine oil. To prevent the turbine oil from flowing into the river and causing pollution, or river water from seeping into the runner and causing corrosion or damage, a tight seal is crucial. The turbine oil inside the runner serves two main purposes: firstly, it lubricates the operating mechanisms (operating frame, linkage mechanism, swing arm, piston rod and piston bushing, pivot and inner and outer copper bushings) within the runner body. The main pressure is the overflow from the oil receiver at the runner installation elevation of 172m to 193m, flowing through the outer cavity of the operating oil pipe and the inner shaft. The turbine oil, which accounts for the height difference in the chamber and the centrifugal force during unit operation, has a pressure of approximately 0.2 MPa and is commonly known as the atmospheric pressure chamber. The second type of pressure oil is supplied by the governor's main pressure distribution valve, passing through the oil receiver and internal and external operating oil pipes to the runner piston cylinder. This pressure oil is used to control the coordinated relationship between the blade movement and the guide vane head load, with a maximum pressure of 6.3 MPa, commonly known as pressure oil. The traditional oil discharge device works by connecting a threaded plug to the oil discharge port of the spring-loaded plug, providing a sealing function. When draining oil, the spring plug could easily loosen and cause leakage when the threaded plug was removed. An improved solution replaced the traditional threaded plug with a plug plate. The plug plate is directly fixed to the impeller cylinder body with countersunk screws. The plug plate, in conjunction with sealing ring A, directly seals the oil drain port of the flow channel. Even if leakage occurs due to loosening between the spring plug and the flow channel, oil will not leak to the outside, and river water will not seep into the impeller. Furthermore, due to the different disassembly method, removing the plug plate will not interfere with the spring plug, further preventing the spring plug from loosening due to threaded plug removal. The actual performance is good, but there are still drawbacks. First, removing the plug plate requires removing more than one screw, increasing the complexity. Second, the spring plug has a certain risk of oil leakage, including leakage between the sealing plug and sealing ring, between the spring plug housing and the spring plug and the impeller cylinder body, resulting in a small amount of oil leaking out directly when the plug plate is removed. Utility Model Content

[0003] To address the problems mentioned in the background section, this invention provides a novel oil draining device for a water turbine runner, which prevents direct oil leakage, further avoids the need to disassemble multiple countersunk screws, and is convenient and clean to operate.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel turbine runner oil discharge device, comprising an oil discharge device fixedly installed in the flow channel, the oil discharge device including a spring plug, wherein the oil discharge port of the spring plug is sealed by a plug plate detachably installed on the runner cylinder, characterized in that: a control rod is slidably connected to the inner side of the plug plate located in the oil discharge coverage area of ​​the spring plug, and the control rod is a tubular structure with one end closed, the closed end of the control rod being located inside the spring plug, and a limiting plate is provided at the end of the control rod located inside the spring plug, and the limiting plate and the inner surface of the plug plate are sealed by a sealing ring B;

[0005] When the limiting plate acts as a seal, the oil drain hole on the control rod is covered by the plug plate.

[0006] As a preferred embodiment of the novel turbine runner oil discharge device of this utility model, the control rod is provided with a shearing thread on the outer part outside the blockage plate, and a nut is threadedly connected to the shearing thread of the control rod.

[0007] As a preferred embodiment of the novel turbine runner oil discharge device of this utility model, the limiting plate or a portion thereof is embedded inside the blocking plate.

[0008] As a preferred embodiment of the novel turbine runner oil discharge device of this utility model, the limiting plate has a prism structure, and the blind groove of the blocking plate into which the limiting plate is embedded matches the shape of the limiting plate.

[0009] In a preferred embodiment of this novel turbine runner oil discharge device, the opening of the control rod is sealed with a threaded cap.

[0010] As a preferred embodiment of the novel turbine runner oil discharge device of this utility model, the opening of the control rod is threaded with a connector for guiding the oil, and one end of the connector is connected to a flexible hose.

[0011] As a preferred embodiment of the novel turbine runner oil discharge device of this utility model, when the limiting plate and the blind groove of the blocking plate are disengaged, the control rod can push open the sealing plug to open the passage of the spring plug.

[0012] Compared with the prior art, the advantages of this utility model are: it does not require disassembling the countersunk screws on the plug plate; it only requires pushing the control rod upward. Pushing the control rod upward will cause it to push the sealing plug, separating the sealing plug from the sealing ring. At the same time, the upward movement of the control rod will cause the oil drain hole, which was originally covered by the plug plate, to leak out. The oil will enter the inside of the control rod from the oil drain hole. It is only necessary to connect a pipe at the bottom opening of the control rod to guide the oil to the target collection tank. Since the plug plate does not need to be disassembled, the oil will not leak directly, and it also avoids disassembling multiple countersunk screws. The operation is convenient and clean. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram showing the position of the oil draining device installed on the rotary cylinder body in this utility model;

[0015] Figure 2 This is a schematic diagram of the prior art structure of the oil discharge device in this utility model;

[0016] Figure 3 This is a schematic diagram of the improved oil discharge device in this utility model;

[0017] Figure 4 This is an enlarged view of the connection structure of the control rod in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the oil drainage system in this utility model, in which the limiting plate and the blind groove are staggered.

[0019] In the picture:

[0020] 1. Main shaft; 2. Rotary cylinder body; 3. Cavity; 4. Flow channel; 5. Oil drain device; 6. Plug plate; 7. Seal ring A; 8. Control rod; 9. Limiting plate; 10. Seal ring B; 11. Oil drain hole; 12. Nut; 13. Connector; 14. Hose;

[0021] 51. Spring plug; 52. Oil inlet; 53. Compression spring; 54. Sealing plug; 55. Sealing ring; 56. Sealing ring C; 57. Threaded plug; 58. Sealing ring D. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-5 As shown:

[0024] A novel turbine runner oil discharge device includes a runner cylinder body 2 and a main shaft 1 installed inside the runner cylinder body 2. The inner side of the runner cylinder body 2 has a cavity 3 and a flow channel 4 communicating with the outside. The oil discharge device 5 includes a spring plug 51 threadedly installed in the flow channel 4. The oil discharge port of the spring plug 51 has an outwardly extending flange. The flange surface of the spring plug 51 is sealed to the corresponding mounting surface of the runner cylinder body 2 by a sealing ring C56. When the spring plug 51 is threaded onto the flow channel 4, the flange of the spring plug 51 presses against the sealing ring C56, achieving a seal. To prevent oil leakage from the flow channel 4, the oil outlet of the spring plug 51 is sealed by a plug plate 6 detachably installed on the rotary cylinder 2. A sealing ring A7 is installed on the sealing surface of the plug plate 6 corresponding to the rotary cylinder 2. A control rod 8 is slidably connected to the inner side of the plug plate 6 located in the oil discharge coverage area of ​​the spring plug 51. The control rod 8 is a tubular structure with one end closed. The closed end of the control rod 8 is located inside the spring plug 51. A limiting plate 9 is provided at the end of the control rod 8 located inside the spring plug 51. The limiting plate 9 and the inner surface of the plug plate 6 are sealed by a sealing ring B10.

[0025] When the limiting plate 9 acts as a seal, the oil drain hole 11 on the control rod 8 is covered by the plug plate 6.

[0026] The runner of an axial-flow propeller turbine is filled with a large amount of turbine oil. To prevent this oil from flowing into the river and causing pollution, or from river water seeping into the runner and causing corrosion or damage, a tight seal is crucial. The turbine oil inside the runner serves two main purposes: first, it lubricates the operating mechanisms (operating frame, linkage mechanism, swing arm, piston rod and piston bushing, pivot and inner / outer copper bushings) within the runner body. The main pressure here is the turbine oil overflowing from the oil receiver at the runner installation elevation of 172m to 193m, passing through the height difference between the outer cavity of the operating oil pipe and the inner cavity of the main shaft, as well as the centrifugal force during unit operation. This pressure is approximately 0.2MPa and is commonly referred to as the atmospheric pressure chamber. Second, it is the operating oil supplied by the governor's main pressure distribution valve through the oil receiver and the inner / outer operating oil pipes to the runner piston cylinder. This pressurized oil is used to control the coordination between the blade movement and the guide vane head load, with a maximum pressure of 6.3MPa. Figure 2As shown, the traditional oil draining device 5 works by connecting a threaded plug 57 to the oil drain port of the spring plug 51. The threaded plug 57 presses the sealing ring D58 against one side of the impeller cylinder 2, providing a seal. However, when draining oil, loosening the threaded plug 57 can easily cause the spring plug 51 to loosen, leading to leakage. An improved solution replaces the traditional threaded plug 57 with a plug plate 6. The plug plate 6 is directly fixed to the impeller cylinder 2 with countersunk screws. The plug plate 6, in conjunction with the sealing ring A7, directly seals the oil drain port of the flow channel 4. Even if leakage occurs due to loosening between the spring plug 51 and the flow channel 4, oil will not leak to the outside, and river water will not seep into the impeller. Furthermore, due to the different disassembly method, removing the plug plate 6 will not damage the spring plug. The device 51 causes interference, which further avoids the situation where the spring plug 51 becomes loose due to the removal of the threaded plug 57. The actual use effect is good, but there are still defects. First, removing the plug plate 6 requires removing more than one screw, which increases the tediousness. Second, the spring plug 51 has a certain risk of oil leakage, including leakage between the sealing plug 54 and the sealing ring 55, the housing of the spring plug 51, and the spring plug 51 and the rotary cylinder 2. This will cause a small amount of oil to leak out directly when removing the plug plate 6. Third, when draining oil, a rod-like tool is needed to continuously push the sealing plug 54 and the sealing ring 55 to separate them before the oil can be drained. Generally, the rod is pushed manually, which can easily cause hand soreness. The oil will flow down the rod and may also flow down the rod onto the person's body.

[0027] In this solution, it is not necessary to remove the countersunk screws on the plug plate 6. Simply push the control lever 8 upward. Pushing the control lever 8 upward will cause it to push the sealing plug 54, separating the sealing plug 54 from the sealing ring 55. At the same time, the upward movement of the control lever 8 will cause the oil drain hole 11, which was originally covered by the plug plate 6, to leak out. The oil will enter the inside of the control lever 8 from the oil drain hole 11. Simply connect a pipe at the bottom opening of the control lever 8 to guide the oil to the target collection tank. Since the plug plate 6 does not need to be removed, the oil will not leak out directly, and the removal of multiple countersunk screws will be further avoided. The operation is convenient and clean.

[0028] The principle of the spring plug 51 is as follows: the oil in the flow channel 4 enters the interior of the spring plug 51 through the oil inlet 52. When the sealing plug 54 moves upward against the elastic force of the compression spring 53 and separates from the sealing ring 55, the oil can further pass through the area originally sealed by the sealing plug 54 and continue to flow downward, thus realizing oil discharge.

[0029] In an optional embodiment, the outer portion of the control lever 8 located outside the blocking plate 6 is provided with a shearing thread, and a nut 12 is threadedly connected to the shearing thread of the control lever 8.

[0030] In this embodiment, by locking the nut 12, the control rod 8 can be moved downward. The control rod 8 will drive the limiting plate 9 to move downward and press against the inner surface of the blocking plate 6. With the help of the sealing ring B10, a stable sealing effect can be continuously provided when oil drainage is not required. When draining oil, simply rotate the nut 12 to move the nut 12 downward, and the control rod 8 can be pushed upward.

[0031] In an alternative embodiment, the limiting plate 9 or a portion thereof is embedded inside the blocking plate 6.

[0032] In this embodiment, the sealing effect can be further improved when the limiting plate 9 or a portion of the limiting plate 9 is embedded inside the blocking plate 6.

[0033] In an optional embodiment, the limiting plate 9 has a prism structure, and the blind slot of the blocking plate 6 into which the limiting plate 9 is embedded matches the shape of the limiting plate 9.

[0034] In this embodiment, the limiting plate 9 is set as a prism structure to prevent the limiting plate 9 from rotating, so that the nut 12 can be rotated more directly, which facilitates the disassembly and locking of the nut 12.

[0035] In an alternative embodiment, the opening of the control lever 8 is sealed with a threaded cap.

[0036] In this embodiment, a threaded cap is installed to seal the control rod 8, preventing dust from entering.

[0037] In an optional embodiment, the opening of the control lever 8 is threaded with a connector 13 for guiding oil, one end of which is connected to a hose 14.

[0038] In this embodiment, when draining oil, the threaded cap can be removed first, then the threaded connector 13 can be connected, and then the nut 12 can be loosened so that the nut 12 moves downward a certain distance, leaving space for the control rod 8 to move. When the control rod 8 is pushed upward to drain oil, the oil can enter the hose 14 through the connector 13 from the control rod 8, which facilitates the collection of oil.

[0039] In an alternative embodiment, when the limiting plate 9 disengages from the blind groove of the blocking plate 6, the control lever 8 can push open the sealing plug 54 to open the passage of the spring plug 51.

[0040] In this embodiment: as follows Figure 5As shown, when the limiting plate 9 is pushed upward and completely disengaged from the blind groove of the blocking plate 6, the upward movement of the control rod 8 is sufficient to push the sealing plug 54 to open the passage. Since both the blind groove and the limiting plate 9 are prism structures, they only need to be rotated at a certain angle to make the limiting plate 9 and the blind groove misaligned, so that the limiting plate 9 can be stably limited at this position, and the control rod 8 can continuously push the sealing plug 54 open, avoiding the soreness of continuous hand holding. At the same time, the misalignment of the limiting plate 9 and the blind groove leaves a gap for the oil to flow out.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel turbine runner oil discharge device, comprising an oil discharge device (5) fixedly installed in a flow channel (4), the oil discharge device (5) comprising a spring plug (51), wherein the oil discharge port of the spring plug (51) is sealed by a plug plate (6) detachably installed on the runner cylinder (2), characterized in that: A control rod (8) is slidably connected to the inner side of the plug plate (6) located in the oil discharge coverage area of ​​the spring plug (51), and the control rod (8) is a tubular structure with one end closed. The closed end of the control rod (8) is located inside the spring plug (51), and a limiting plate (9) is provided at the end of the control rod (8) located inside the spring plug (51). The limiting plate (9) and the inner surface of the plug plate (6) are sealed by a sealing ring B (10). When the limiting plate (9) acts as a seal, the oil drain hole (11) on the control rod (8) is covered by the plug plate (6).

2. The novel water turbine runner oil discharge device according to claim 1, characterized in that: The control lever (8) is provided with a shearing thread on the outer part outside the block plate (6), and a nut (12) is threadedly connected to the shearing thread of the control lever (8).

3. The novel water turbine runner oil discharge device according to claim 1 or 2, characterized in that: The limiting plate (9) or a portion thereof is embedded inside the blocking plate (6).

4. The novel turbine runner oil discharge device according to claim 3, characterized in that: The limiting plate (9) has a prism structure, and the blind groove of the blocking plate (6) into which the limiting plate (9) is embedded matches the shape of the limiting plate (9).

5. The novel water turbine runner oil discharge device according to claim 1, characterized in that: The opening of the control lever (8) is sealed by a threaded cap.

6. The novel water turbine runner oil draining device according to claim 1, characterized in that: The opening of the control lever (8) is threaded with a connector (13) for guiding oil, and one end of the connector (13) is connected to a hose (14).

7. The novel water turbine runner oil discharge device according to claim 3, characterized in that: When the limiting plate (9) disengages from the blind groove of the blocking plate (6), the control rod (8) can push open the sealing plug (54) to open the passage of the spring plug (51).

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