End face adjusting structure of water guide mechanism for vertical water turbine transformation unit

Abstract

The utility model discloses an end face adjusting structure of a water guide mechanism for a vertical water turbine transformation unit, and belongs to the technical field of water turbines. The end face adjusting structure comprises a bottom ring and connecting assemblies, the bottom ring is connected to a seat ring of the water turbine through the connecting assemblies, each connecting assembly comprises an adjusting screw and a combining bolt, the adjusting screws are in threaded connection to the bottom ring, the ends of the adjusting screws extend out of the bottom ring and make contact with the seat ring, and the combining bolts penetrate through the bottom ring and are in threaded connection to the seat ring. The adjusting screws are additionally arranged between the bottom ring and the seat ring, the adjusting screws and the fastening bolts are alternately arranged, in the adjusting process, the relative position of the bottom ring and the seat ring is adjusted through threads of the adjusting screws, and after the height of the bottom ring is adjusted to meet the requirement, the bottom ring is fixedly connected to the seat ring through the fastening bolts. The fastening bolt and the adjusting screw are standard parts, so that special tools are not needed; and the top cover structure can meet the requirement of bolt combination connection, so that the production cost of the top cover is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water turbines, in particular to an end face regulating structure of a water guide mechanism for a vertical water turbine transformation unit. Background Art

[0002] A hydraulic turbine is a power machine that converts the energy of water flow into rotational mechanical energy. When a hydraulic turbine is operating in a power station with a large amount of sediment, the guide vanes between the bottom ring and the top cover are prone to mutual wear, and the end surface clearances between the guide vanes and the top cover and between the guide vanes and the bottom ring will increase. Even after the guide vanes are fully closed, the water leakage can still drive the runner to rotate, affecting the stability of the unit.

[0003] In order to solve the above-mentioned problem of increased end face clearance, the patent with authorization announcement number CN 214366512 U discloses an adjustable end face clearance structure for small and medium-sized vertical turbines, which adjusts the distance between the top cover and the seat ring by adding a fine-pitch thread adjustment sleeve to the top cover, thereby adjusting the end face clearance between the guide vane and the top cover and the bottom ring.

[0004] As far as the prior art is concerned, the fine thread adjustment sleeve is a non-standard part, and a special wrench is needed to adjust it, which is inconvenient to operate. In addition, in order to allow the top cover to be completely embedded in the fine thread adjustment sleeve, its thickness needs to be much thicker than that of a conventional top cover, resulting in an increase in the production cost of the top cover. Utility Model Content

[0005] The purpose of the utility model is to provide an end face adjustment structure of a water guide mechanism for a vertical turbine modification unit to solve the above-mentioned problems existing in the prior art.

[0006] Technical solution: An end face adjustment structure of a water guide mechanism for a vertical turbine modification unit, comprising a bottom ring and a connecting assembly, wherein the bottom ring is connected to a seat ring of the turbine using a plurality of connecting assemblies, wherein the connecting assembly comprises an adjusting screw and a closing bolt, wherein the adjusting screw is threadedly connected to the bottom ring, and the end portion extends out of the bottom ring and contacts the seat ring, and the closing bolt passes through the bottom ring and is threadedly connected to the seat ring.

[0007] Furthermore, the bottom ring is provided with a plurality of guide vane holes, the guide vane holes are evenly distributed in an array along the center of the bottom ring, and the periphery of the guide vane holes is provided with adjustment threaded holes for assembling adjustment screws.

[0008] Furthermore, the bottom ring is provided with engagement holes for assembling engagement bolts, the engagement holes and the adjustment threaded holes are alternately distributed, and the engagement holes are countersunk holes.

[0009] Furthermore, the top mounting surfaces of the adjusting screw and the engaging bolt are lower than the upper end surface of the bottom ring, and sealing material is provided between the adjusting screw and the bottom ring and between the engaging bolt and the bottom ring.

[0010] Furthermore, a sealing groove is provided on the outer side wall of the bottom ring, and a sealing ring for sealing the bottom ring and the seat ring is provided in the sealing groove.

[0011] Furthermore, the end face adjustment structure also includes a top cover, and the top cover is installed on the top of the seat ring through an upper handle assembly.

[0012] Beneficial effect: The utility model optimizes the top cover adjustment method of the traditional water guide mechanism end face gap into bottom ring adjustment, adds an adjustment screw between the bottom ring and the seat ring, and arranges the adjustment screw and the engagement bolt alternately. During the adjustment process, first use the adjustment screw thread to adjust the relative position of the bottom ring and the seat ring. After the bottom ring height is adjusted to meet the requirements, the bottom ring is fixedly connected to the seat ring with the engagement bolt. Both the engagement bolt and the adjustment screw are standard parts. No special tools are required in the process of adjusting the gap, and the operation is convenient and efficient. Optimizing the top cover adjustment into bottom ring adjustment can avoid structural modification of the top cover, and a thin top cover structure that meets the bolt engagement requirements can be used, thereby reducing the production cost of the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 The utility model is Figure 1 The enlarged view of A in FIG.

[0015] Figure 3 It is a structural schematic diagram of the bottom ring in the utility model;

[0016] Figure 4 The utility model is Figure 3 The enlarged view of point B in FIG.

[0017] Figure 5 The utility model is Figure 3 Enlarged view of point C in FIG.

[0018] The accompanying drawings are marked as follows: 1. seat ring; 2. bottom ring; 21. handle hole; 22. adjustment threaded hole; 23. guide vane hole; 24. sealing groove; 3. adjustment screw; 4. sealing material; 5. sealing ring; 6. guide vane shaft; 7. top cover; 8. upper handle assembly. DETAILED DESCRIPTION

[0019] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0020] like Figure 1-Figure 4 As shown, an end face adjustment structure of a water guide mechanism for a vertical turbine modification unit includes a bottom ring 2 and a connecting assembly. The bottom ring 2 is connected to a seat ring 1 of the turbine by using a plurality of sets of connecting assemblies. The connecting assembly includes an adjusting screw 3 and a closing bolt. The adjusting screw 3 is threadedly connected to the bottom ring 2, and the end portion extends out of the bottom ring 2 and contacts the seat ring 1. The closing bolt passes through the bottom ring 2 and is threadedly connected to the seat ring 1.

[0021] The utility model optimizes the top cover adjustment method of the traditional water guide mechanism end face gap into bottom ring adjustment, adds an adjusting screw 3 between the bottom ring 2 and the seat ring 1, and the adjusting screw 3 and the engaging bolt are arranged alternately. During the adjustment process, the adjusting screw 3 is first used to adjust the relative position of the bottom ring 2 and the seat ring 1 by thread, and after the height of the bottom ring 2 is adjusted to meet the requirements, the bottom ring 2 is fixedly connected to the seat ring 1 by the engaging bolt. The engaging bolt and the adjusting screw 3 are both standard parts, and the process of adjusting the gap does not require the use of special tools, and the operation is convenient and efficient. Moreover, optimizing the top cover adjustment into bottom ring adjustment can avoid the structural modification of the top cover 7, and a thin top cover 7 structure that meets the bolt engaging requirements can be used, thereby reducing the production cost of the top cover 7.

[0022] A plurality of guide vane holes 23 are provided on the bottom ring 2, and the guide vane holes 23 are evenly distributed in an array along the center of the bottom ring 2. The bottom ring 2 is welded with a baffle at the position of the guide vane hole 23, and the guide vane shaft 6 is filled in the guide vane hole 23. After long-term use, the guide vane shaft 6 and the bottom ring 2 wear each other, thereby increasing the end surface clearance between the impeller assembled on the guide vane shaft 6 and the top cover 7.

[0023] An adjustment threaded hole 22 for assembling the adjustment screw 3 is arranged on the periphery of the guide vane hole 23. The adjustment threaded hole 22 cooperates with the adjustment screw 3, and the adjustment screw 3 with the end against the seat ring 1 enables the bottom ring 2 to have the ability to change the relative height with the seat ring 1, meets the requirement of adjusting the installation position of the seat ring 1, and compensates for the end face clearance of about 2mm caused by the use loss.

[0024] The bottom ring 2 is also provided with engagement holes 21 for assembling engagement bolts. The engagement holes 21 and the adjustment threaded holes 22 are alternately distributed, and the engagement holes 21 are countersunk holes. The top mounting surfaces of the adjustment screws 3 and the engagement bolts are lower than the upper end surface of the bottom ring 2. A sealant 4 is provided between the adjustment screws 3 and the bottom ring 2 and between the engagement bolts and the bottom ring 2. Taking the vertical mixed flow turbine of the power station model HLTF75g-LJ-140 as an example, the bottom ring 2 used therein is provided with 24 engagement holes 21 and 24 adjustment threaded holes 22. The sealant 4 is preferably epoxy resin. After the adjustment is completed, the epoxy resin is filled on the flow surface and ground after the epoxy resin is dry, so as to achieve a smooth seal on the flow surface of the bottom ring 2.

[0025] The outer wall of the bottom ring 2 is provided with a sealing groove 24, and a sealing ring 5 for sealing the bottom ring 2 and the seat ring 1 is provided in the sealing groove 24. The bottom ring 2 is arranged on the boss edge of the seat ring 1, and the sealing ring 5 is used for the sealing effect between the two.

[0026] The end face adjustment structure also includes a top cover 7, which is installed on the top of the seat ring 1 through an upper engagement assembly 8. Compared with the traditional end cover adjustment, the top cover 7 does not need to be filled with a fine-threaded adjustment sleeve, and the thickness is as thin as possible to meet the engagement installation conditions.

[0027] When the utility model is in use, the assembly end surfaces of the seat ring 1, the bottom ring 2, the guide vane shaft 6 and the top cover 7 are first cleaned and trimmed, and then the bottom ring 2 with the sealing ring 5 is loaded onto the boss edge of the seat ring 1, and then the end surface of the adjusting screw 3 is contacted with the seat ring 1 to adjust the height of the bottom ring 2, thereby realizing the raising of the flow surface of the bottom ring 2 to compensate for the end surface gap caused by use wear. After the height of the bottom ring 2 is adjusted, the bottom ring 2 is fixed to the seat ring 1 with a closing bolt, and then the closing hole 21 and the adjusting threaded hole 22 on the bottom ring 2 are sealed and filled with a sealing substance 4, and the sealing substance 4 is dried and then leveled and trimmed, and finally the other components of the turbine are assembled.

[0028] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. An end face adjustment structure of a water guide mechanism for a vertical turbine modification unit, characterized in that: The invention comprises a bottom ring (2) and a connection assembly, wherein the bottom ring (2) is connected to a seat ring (1) of a turbine by means of a plurality of sets of connection assemblies, wherein the connection assembly comprises an adjustment screw (3) and a locking bolt, wherein the adjustment screw (3) is threadedly connected to the bottom ring (2) and an end portion thereof extends out of the bottom ring (2) and contacts the seat ring (1), and the locking bolt passes through the bottom ring (2) and is threadedly connected to the seat ring (1).

2. The end face adjustment structure of the water guide mechanism for a vertical turbine modification unit according to claim 1, characterized in that: The bottom ring (2) is provided with a plurality of guide vane holes (23), the guide vane holes (23) are evenly distributed in an array along the center of the bottom ring (2), and the periphery of the guide vane holes (23) is provided with adjustment threaded holes (22) for assembling adjustment screws (3).

3. The end face adjustment structure of the water guide mechanism for a vertical turbine modification unit according to claim 2, characterized in that: The bottom ring (2) is also provided with a handle hole (21) for assembling a handle bolt, the handle hole (21) and the adjustment threaded hole (22) are alternately distributed, and the handle hole (21) is a countersunk hole.

4. The end face adjustment structure of the water guide mechanism for a vertical turbine modification unit according to claim 3 is characterized in that: The top mounting surfaces of the adjusting screw (3) and the engaging bolt are lower than the upper end surface of the bottom ring (2), and a sealing material (4) is provided between the adjusting screw (3) and the bottom ring (2) and between the engaging bolt and the bottom ring (2).

5. The end face adjustment structure of the water guide mechanism for a vertical turbine modification unit according to claim 2, characterized in that: The outer wall of the bottom ring (2) is provided with a sealing groove (24), and a sealing ring (5) for sealing the bottom ring (2) and the seat ring (1) is provided in the sealing groove (24).

6. The end face adjustment structure of the water guide mechanism for a vertical turbine modification unit according to claim 1, characterized in that: The end face adjustment structure also includes a top cover (7), and the top cover (7) is installed on the top of the seat ring (1) through an upper handle assembly (8).

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