Guide vane adjusting mechanism of water turbine

Abstract

A guide vane is installed between a top plate and a bottom plate, a first clamping block and a second clamping block are installed at the upper end and the lower end of the guide vane respectively, the first clamping block is installed in a through groove of the top plate, the second clamping block is installed in a clamping groove of the bottom plate, a first threaded hole is formed in the top of the first clamping block, and a second threaded hole is formed in the bottom of the second clamping block. A first threaded hole is formed in the top plate, a cover plate is mounted on the top plate, and a fixing bolt capable of being in threaded fit with the first threaded hole is mounted on the cover plate. The screw rod can be in threaded fit with the first threaded hole in the first clamping block, and the screw rod can penetrate through the supporting frame and extend out of the supporting frame; the operating handle is arranged at the position above the supporting frame, the operating handle is in threaded fit with the screw rod, and when the operating handle and the screw rod rotate relatively, the guide vane can be driven to move upwards under the sliding fit effect of the first clamping block and the top plate through groove; and the gasket and the guide vane are clamped between the guide vane and the bottom plate when moving upwards to the corresponding position between the top plate and the bottom plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a guide vane adjusting mechanism of a hydraulic turbine. BACKGROUND

[0002] As an important component of the water guide mechanism of the hydraulic turbine, the guide vane controls the flow and speed of water when the hydraulic turbine is working. The guide vane is located between the top plate and the bottom plate. In order to ensure the output and efficiency of the unit, the gap between the upper and lower end faces of the guide vane has strict process requirements. Because the hydraulic turbine is large in size, the traditional guide vane end face gap adjustment is to rotate the fixed bolt on the cover plate of the guide vane by hammering, to lift the guide vane through the cooperation of the fixed bolt and the guide vane thread. In this process, the guide vane end face gap is set by repeatedly measuring the guide vane end face gap and calculating the thickness of the adjusting gasket to adjust the guide vane end face gap, which is labor intensive and low in work efficiency. At the same time, the surface of the equipment is easily damaged or people are easily hurt due to excessive hammering force. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a guide vane adjusting mechanism of a hydraulic turbine to solve the above technical problems.

[0004] The technical scheme adopted by the utility model is as follows: a guide vane adjusting mechanism of a hydraulic turbine, the guide vane is installed between the top plate and the bottom plate, the upper end and the lower end of the guide vane are respectively provided with a first clamping block and a second clamping block, the first clamping block is installed in the through slot of the top plate, the second clamping block is installed in the clamping slot of the bottom plate, a first threaded hole is formed in the top of the first clamping block, a cover plate is installed on the top plate, a fixed bolt capable of being screwed with the first threaded hole is installed on the cover plate, and the guide vane adjusting mechanism is characterized by having:

[0005] The support frame can be installed on the top plate.

[0006] The screw rod can be screwed with the first threaded hole of the first clamping block, a nut capable of being screwed with the screw rod is installed on the screw rod above the first clamping block, and the screw rod can pass through the support frame and extend out of the support frame.

[0007] The operation handle is arranged above the support frame, the operation handle is screwed with the screw rod, and when the operation handle rotates relative to the screw rod, the guide vane can be moved upward under the cooperation of the sliding of the first clamping block and the through slot of the top plate.

[0008] The adjusting gasket is clamped between the guide vane and the bottom plate when the guide vane is moved upward to the corresponding position between the top plate and the bottom plate.

[0009] A second threaded hole is formed in the top plate, a third threaded hole is formed in the support frame at the corresponding position of the second threaded hole, a fourth threaded hole is formed in the cover plate at the corresponding position of the second threaded hole, and the support frame and the cover plate can be installed on the top plate by installing the mounting bolt screwed with the second threaded hole.

[0010] A flat washer is arranged on the support frame, and a thrust bearing is arranged on the flat washer. The operating handle is arranged on the thrust bearing.

[0011] A pad is placed between the guide vane and the cover plate.

[0012] The beneficial effects of this utility model are as follows: By providing a second threaded hole on the top plate, it is convenient to remove the cover plate and fixing bolts used to fix the guide vane from the top plate and then install the support frame on the top plate. The screw is connected to the guide vane by threaded engagement with the first threaded hole on the first locking block of the guide vane, with the end of the screw extending onto the support frame. Furthermore, by sequentially arranging a flat washer, a thrust bearing, and an operating handle threadedly engaged with the screw on the support frame from bottom to top, the operating handle is positioned at a certain distance from the top plate, facilitating operation. When the operator rotates the operating handle, the operating handle moves relative to the screw. Under the action of the thrust bearing, flat washer, and support frame at the lower end of the operating handle, the screw and guide vane are driven to move upward. When the operator rotates the operating handle in the opposite direction, the operating handle moves upward relative to the screw, and the screw and guide vane move downward under their own weight, which facilitates the adjustment of the guide vane position. After the guide vane position is adjusted to a suitable position, an adjusting shim is arranged in the gap between the guide vane and the base plate. This makes it easy to keep the guide vane in the corresponding position between the top plate and the base plate when the support frame and screw are removed from the top plate. This facilitates the subsequent installation of the cover plate and fixing bolts on the top plate, thus fixing the guide vane in that position. Attached Figure Description

[0013] Figure 1 : A schematic diagram of the structure of the guide vane adjustment mechanism installed on the guide vane in this utility model.

[0014] Figure 2 : A schematic diagram of the structure of the cover plate installed on the guide vane in this utility model.

[0015] In the diagram: 1. Guide vane; 1-1. First locking block; 1-2. Second locking block; 1-3. First threaded hole; 2. Top plate; 2-1. Through groove; 2-2. Second threaded hole; 3. Bottom plate; 3-1. Locking groove; 4. Support frame; 4-1. Third threaded hole; 5. Screw; 6. Operating handle; 7. Flat washer; 8. Thrust bearing; 9. Nut; 10. Cover plate; 10-1. Fourth threaded hole; 11. Fixing bolt; 12. Mounting bolt; 13. Adjusting shim; 14. Pad plate. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0017] Embodiment 1 is an adjustment mechanism for a guide vane 1 of a water turbine. The guide vane 1 is installed between a top plate 2 and a bottom plate 3. A first locking block 1-1 and a second locking block 1-2 are respectively installed at the upper and lower ends of the guide vane 1. The first locking block 1-1 is installed in a through groove 2-1 of the top plate 2, and the second locking block 1-2 is installed in a slot 3-1 of the bottom plate 3. A first threaded hole 1-3 is formed on the top of the first locking block 1-1. A cover plate 10 is installed on the top plate 2, and a fixing bolt 11 that can be threaded into the first threaded hole 1-3 is installed on the cover plate 10. It has the following characteristics:

[0018] Support frame 4 can be installed on top plate 2;

[0019] The screw 5 can be threaded into the first threaded hole 1-3 on the first locking block 1-1, and the screw 5 can pass through the support frame 4 and extend onto the support frame 4;

[0020] The operating handle 6 is located above the support frame 4. The operating handle 6 is threadedly engaged with the screw 5. When the operating handle 6 and the screw 5 rotate relative to each other, the guide vane 1 can be driven to move upward under the sliding engagement of the first locking block 1-1 and the through groove 2-1 of the top plate 2.

[0021] Adjusting shim 14, when the guide vane 1 moves upward between the top plate 2 and the bottom plate 3 to the corresponding position, it is locked between the guide vane 1 and the bottom plate 3. Thus, after removing the cover plate 10 and fixing bolts 11 from the top plate 2, the guide vane 1 will move downward under its own weight and contact the bottom plate 3. The screw 5 is installed on the guide vane 1 through the threaded engagement with the first threaded hole 1-3 on the first locking block 1-1, and a nut 9 is installed on the screw 5 through the threaded engagement, clamping the nut 9 with the first locking block 1-1, which serves as a double nut 9 anti-loosening function, realizing the fixed connection of the screw 5, nut 9 and the first locking block 1-1. The mounting bracket is installed on the top plate 2 and the screw 5 passes through the support frame 4. An operating handle 6, threadedly engaged with the screw 5, is installed on the screw 5, maintaining a certain distance between the operating handle 6 and the top plate 2. This facilitates operation of the operating handle 6. When the operator rotates the operating handle 6, it moves downward relative to the screw 5. Under the action of the support frame 4 at the lower end of the operating handle 6, it drives the screw 5 and guide vane 1 upward. When the operator rotates the operating handle 6 in the opposite direction, it moves upward relative to the screw 5, and under its own weight, it causes the screw 5 and guide vane 1 to move downward, facilitating the adjustment of the guide vane 1's position. When adjusting the guide vane 1 to a suitable position, an adjusting shim 14 is placed in the gap between the guide vane 1 and the base plate 3 to support the guide vane 1 when the support frame 4 and screw 5 are removed, and to keep the guide vane 1, top plate 2, and base plate 3 in their corresponding positions when the cover plate 10 and fixing bolts 11 are installed on the top plate 2. When removing screw 5, personnel need to manually move nut 9 upwards to disengage it from the first locking block 1-1. At this time, screw 5 can be removed from the first locking block 1-1.

[0022] Example 2 is an adjustment mechanism for the guide vane 1 of a water turbine. Based on Example 1, in this example: a second threaded hole 2-2 is formed on the top plate 2; a third threaded hole 4-1 is formed on the support frame 4 at a position corresponding to the second threaded hole 2-2; and a fourth threaded hole 10-1 is formed on the cover plate 10 at a position corresponding to the second threaded hole 2-2. Both the support frame 4 and the cover plate 10 can be installed on the top plate 2 by installing mounting bolts 12 that are threaded into the second threaded hole 2-2. This facilitates the installation of the support frame 4 at the corresponding position after the cover plate 10 is removed from the top plate 2.

[0023] Example 3 is an adjustment mechanism for the guide vane 1 of a water turbine. Based on Example 1, in this example: a flat washer 7 is arranged on the support frame 4, and a thrust bearing 8 is arranged on the flat washer 7. The operating handle 6 is arranged on the thrust bearing 8. In this way, when the operating handle 6 is rotated, the wear between the operating handle 6 and the support frame 4 can be effectively avoided under the action of the thrust bearing 8 and the flat washer 7.

[0024] Example 4 is an adjustment mechanism for the guide vane 1 of a water turbine. Based on Example 1, in this example, a pad 13 is arranged between the guide vane 1 and the cover plate 10. Thus, after adjusting the guide vane 1 to the corresponding position, by arranging the pad 13 above the first end of the guide vane 1, a gap between the guide vane 1 and the cover plate 10 can be effectively avoided, resulting in better stability of the overall structure.

[0025] Example 5 is a guide vane 1 adjustment mechanism for a water turbine, which has:

[0026] Support frame 4 can be installed on top plate 2;

[0027] The screw 5 can be threaded into the first threaded hole 1-3 on the first locking block 1-1. A nut 9 that is threaded into the screw 5 is installed on the screw 5 at a position above the first locking block 1-1. The screw 5 can pass through the support frame 4 and extend onto the support frame 4.

[0028] The operating handle 6 is located above the support frame 4. The operating handle 6 is threadedly engaged with the screw 5. When the operating handle 6 and the screw 5 rotate relative to each other, the guide vane 1 can be driven to move upward under the sliding engagement of the first locking block 1-1 and the through groove 2-1 of the top plate 2.

[0029] Adjusting shim 14, when the guide vane 1 moves upward between the top plate 2 and the bottom plate 3 to the corresponding position, it is locked between the guide vane 1 and the bottom plate 3.

[0030] The top plate 2 has a second threaded hole 2-2, the support frame 4 has a third threaded hole 4-1 at the position corresponding to the second threaded hole 2-2, and the cover plate 10 has a fourth threaded hole 10-1 at the position corresponding to the second threaded hole 2-2. The support frame 4 and the cover plate 10 can be installed on the top plate 2 by installing mounting bolts 12 that are threaded to the second threaded hole 2-2.

[0031] A flat washer 7 is arranged on the support frame 4, and a thrust bearing 8 is arranged on the flat washer 7. The operating handle 6 is arranged on the thrust bearing 8.

[0032] A pad 13 is arranged between the guide vane 1 and the cover plate 10.

[0033] The operation method of this embodiment is as follows:

[0034] Remove the cover plate 10 and fixing bolts 11 from the top plate 2;

[0035] The screw 5 is installed on the guide vane 1 by threaded connection, and the nut 9 is installed on the screw 5. The nut 9 is moved to the position where it engages with the first locking block 1-1 on the guide vane 1, so as to achieve a fixed connection between the screw 5, the nut 9 and the first locking block 1-1.

[0036] Install the support frame 4 at the corresponding position on the top plate 2, so that the screw 5 passes through the support frame 4;

[0037] After sequentially mounting the flat washer 7 and the thrust bearing 8 on the screw 5 on the support frame 4, install the operating handle 6 that is threaded to the screw 5.

[0038] The operator operates the handle 6, which causes the handle 6 and the screw 5 to move relative to each other under the sliding cooperation of the first locking block 1-1 and the through groove 2-1, thereby adjusting the position of the guide vane 1;

[0039] After the guide vane 1 is moved to the point where the gap between the upper end of the guide vane 1 and the top plate 2 and the gap between the lower end of the guide vane 1 and the bottom plate 3 meet the requirements, the adjusting shim 14 is installed in the gap between the lower end of the guide vane 1 and the bottom plate 3.

[0040] Remove the support frame 4 and screw 5 from guide vane 1;

[0041] The pad 13 is positioned above the first locking block 1-1 based on the distance between the first locking block 1-1 at the upper end of the guide vane 1 and the cover plate 10;

[0042] The cover plate 10 is installed on the top plate 2 by mounting bolts 12, and fixing bolts 11 that are threaded into the first threaded holes 1-3 on the guide vane 1 are installed on the cover plate 10.

[0043] Remove the adjusting shim 14 between the guide vane 1 and the base plate 3.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A guide vane adjustment mechanism for a water turbine, wherein a guide vane (1) is installed between a top plate (2) and a bottom plate (3), a first locking block (1-1) and a second locking block (1-2) are respectively installed at the upper and lower ends of the guide vane (1), the first locking block (1-1) is installed in a through groove (2-1) of the top plate (2), and the second locking block (1-2) is installed in a slot (3-1) of the bottom plate (3), the top of the first locking block (1-1) is provided with a first threaded hole (1-3), a cover plate (10) is installed on the top plate (2), and a fixing bolt (11) capable of threadedly engaging with the first threaded hole (1-3) is installed on the cover plate (10), characterized in that: have: The support frame (4) can be installed on the top plate (2); The screw (5) can be threaded into the first threaded hole (1-3) on the first locking block (1-1). A nut (9) that is threaded into the screw (5) is installed on the screw (5) above the first locking block (1-1). The screw (5) can pass through the support frame (4) and extend onto the support frame (4). The operating handle (6) is located above the support frame (4). The operating handle (6) is threadedly engaged with the screw (5). When the operating handle (6) and the screw (5) rotate relative to each other, the guide vane (1) can be driven to move upward under the sliding engagement of the first locking block (1-1) and the through groove (2-1) of the top plate (2). Adjusting shim (13), the guide vane (1) moves upward between the top plate (2) and the bottom plate (3) to the corresponding position and is locked between the guide vane (1) and the bottom plate (3).

2. The guide vane adjusting mechanism for a water turbine according to claim 1, characterized in that: The top plate (2) has a second threaded hole (2-2), the support frame (4) has a third threaded hole (4-1) at the position corresponding to the second threaded hole (2-2), and the cover plate (10) has a fourth threaded hole (10-1) at the position corresponding to the second threaded hole (2-2). The support frame (4) and the cover plate (10) can be installed on the top plate (2) by installing mounting bolts (12) that are threaded to the second threaded hole (2-2).

3. The guide vane adjusting mechanism for a water turbine according to claim 1, characterized in that: A flat washer (7) is arranged on the support frame (4), and a thrust bearing (8) is arranged on the flat washer (7). The operating handle (6) is arranged on the thrust bearing (8).

4. The guide vane adjusting mechanism for a water turbine according to claim 1, characterized in that: A pad (14) is arranged between the guide vane (1) and the cover plate (10).

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