Grinding device for valve disc and diffusion steam nozzle of steam turbine

Abstract

The utility model belongs to the technical field of steam turbine assembly, and particularly discloses a grinding device for a valve disc and a diffusion steam nozzle of a steam turbine, which comprises a positioning plate, a guide sleeve, a grinding rod, a handle, the valve disc and the diffusion steam nozzle, the guide sleeve is mounted in the guide sleeve mounting hole of the positioning plate, and the axis of the guide sleeve is perpendicular to the end face of the positioning plate; the grinding rod is inserted into a center hole of the guide sleeve, the grinding rod and the guide sleeve are coaxial, one end of the grinding rod is provided with the handle, the other end of the grinding rod is connected with the valve disc, and the other end of the valve disc is in contact with the diffusion steam nozzle; the device is simple in structure and convenient to disassemble and assemble, the grinding effect between the valve disc and the diffusion steam nozzle can be rapidly and accurately achieved, the production efficiency is improved, the labor intensity of workers is reduced, and smooth proceeding of the production process is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of steam turbine assembly technology, specifically relating to a grinding device for steam turbine valve discs and diffuser nozzles. Background Technology

[0002] During the assembly of the regulating valve connecting rod in a steam turbine, the valve disc and diffuser nozzle, which control the amount of steam entering the turbine, need to be ground simultaneously to maintain a contact strip width of 1-2 mm and a surface finish of Ra0.8. This assembly requirement is crucial for the overall operation of the steam turbine, so strict adherence to the grinding and fitting requirements is essential.

[0003] The current assembly method involves a fitter holding the valve disc and grinding it directly on the diffuser nozzle. The optimal position for grinding is for the valve disc to be perpendicular to the diffuser nozzle. Due to differences in technical skill, the degree of perpendicularity is directly affected by the unstable grinding effect, requiring repeated adjustments, which is time-consuming and labor-intensive. Utility Model Content

[0004] In view of the problems existing in the background art, the present invention provides a grinding device for steam turbine valve discs and diffuser nozzles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a grinding device for a steam turbine valve disc and a diffuser nozzle, comprising a positioning plate, a guide sleeve, a grinding rod, a handle, a valve disc, and a diffuser nozzle. The positioning plate is bolted to the end face of the steam chamber of the steam turbine. The guide sleeve is installed in the guide sleeve mounting hole of the positioning plate, and the axis of the guide sleeve is perpendicular to the end face of the positioning plate. The grinding rod is inserted into the center hole of the guide sleeve, and the grinding rod is coaxial with the guide sleeve. One end of the grinding rod is provided with a handle, and the other end of the grinding rod is connected to the valve disc. The other end of the valve disc is in contact with the diffuser nozzle.

[0006] The positioning plate is a rectangular flat plate. A guide sleeve mounting hole is provided at the center of the end face of the positioning plate. The guide sleeve mounting hole is a stepped hole. A bolt hole is provided on the outside of the guide sleeve mounting hole. The bolt hole is an oblong hole.

[0007] The guide sleeve is a round tube, and the central hole of the guide sleeve is adapted to the grinding rod; the outer wall of the guide sleeve is adapted to the guide sleeve mounting hole.

[0008] The grinding rod consists of a first stepped shaft, a second stepped shaft, and a third stepped shaft from left to right; the outer diameters of the first stepped shaft and the third stepped shaft are smaller than the outer diameter of the second stepped shaft; the left end of the first stepped shaft is provided with a handle mounting hole for inserting a handle, the outer diameter of the second stepped shaft is adapted to the center hole of the guide sleeve, the right end face of the third stepped shaft is provided with a threaded hole, and one end of the valve disc is installed in the threaded hole.

[0009] The diameter of the guide sleeve mounting hole is larger than the outer diameter of the valve disc.

[0010] The beneficial effects of this utility model are as follows: This utility model provides a grinding device for turbine valve discs and diffuser nozzles. The device has a simple structure and is easy to assemble and disassemble. It can quickly and accurately achieve the grinding effect between valve discs and diffuser nozzles, improve production efficiency, reduce the labor intensity of workers, and ensure the smooth progress of the production process. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention.

[0012] Figure 2 This is a top view of the positioning plate.

[0013] Figure 3 This is a cross-sectional view of the guide sleeve.

[0014] Figure 4 This is the front view of the grinding rod.

[0015] In the diagram: 1. Positioning plate, 2. Guide sleeve, 3. Grinding rod, 4. Handle, 5. Bolt, 6. Valve disc, 7. Diffuser nozzle, 11. Guide sleeve mounting hole, 12. Bolt hole, 21. Center hole, 22. Outer wall, 31. First step shaft, 32. Second step shaft, 33. Third step shaft, 34. Handle mounting hole, 35. Threaded hole. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] The following detailed description of the specific embodiments of this utility model, in conjunction with the accompanying drawings, illustrates the following: A grinding device for a steam turbine valve disc and diffuser nozzle includes a positioning plate 1, a guide sleeve 2, a grinding rod 3, a handle 4, a valve disc 6, and a diffuser nozzle 7. The positioning plate 1 is a rectangular flat plate, and a guide sleeve mounting hole 11 is provided at the center of its end face. The diameter of the guide sleeve mounting hole 11 is larger than the outer diameter of the valve disc 6 to facilitate the passage of the valve disc 6. The guide sleeve mounting hole 11 is a stepped hole. A bolt hole 12 is provided on the outer side of the guide sleeve mounting hole 11. The bolt hole 12 is an oblong shape. The elongated, waist-shaped hole is for easy adjustment of the position of the positioning plate 1; the positioning plate 1 is installed on the steam chamber end face of the steam turbine by bolts 5; the guide sleeve 2 is a round tube, and the central hole 21 of the guide sleeve 2 is adapted to the grinding rod 3; the outer wall 22 of the guide sleeve 2 is adapted to the guide sleeve mounting hole 11; the guide sleeve 2 is installed in the guide sleeve mounting hole 11 of the positioning plate 1. In actual use, the guide sleeve 2 has a circular protrusion in the middle, which is adapted to the guide sleeve mounting hole 11 to prevent the guide sleeve 2 from moving up and down. The axis of the guide sleeve 2 is aligned with the axis of the positioning plate 1. The end faces are perpendicular, and the perpendicularity error between the axis of the guide sleeve 2 and the positioning plate 1 is no greater than 0.02mm, and the center error is no greater than 0.02mm; the grinding rod 3, from left to right, consists of a first step shaft 31, a second step shaft 32, and a third step shaft 33; the outer diameters of the first step shaft 31 and the third step shaft 33 are smaller than the outer diameter of the second step shaft 32, so that the upper and lower ends of the grinding rod 3 can be inserted into the center hole 21 of the guide sleeve 2; the left end of the first step shaft 31 is provided with a handle mounting hole 34 for inserting the handle 4, and the second step shaft 33 is provided with a handle mounting hole 34 for inserting the handle 4. The outer diameter of the shaft 32 is adapted to the center hole 21 of the guide sleeve 2. The right end face of the third step shaft 33 is provided with a threaded hole 35. One end of the valve disc 6 is installed in the threaded hole 35. The second step shaft 32 of the grinding rod 3 is located in the center hole 21 of the guide sleeve 2. The grinding rod 3 and the guide sleeve 2 are coaxial. The grinding rod 3 and the guide sleeve 2 can slide or rotate relative to each other. The valve disc 6 is connected. The other end of the valve disc 6 is in contact with the diffuser nozzle 7. The contact surface between the valve disc 6 and the diffuser nozzle 7 is the grinding surface. The grinding operation can be performed by rotating the valve disc 6.

[0018] The usage process of this utility model is as follows: First, install the positioning plate 1 on the steam chamber end face of the steam turbine and adjust its position; then install the valve disc 6 in the threaded hole 35 of the grinding rod 3; then put the guide sleeve 2 on the grinding rod 3, and then pass the guide sleeve 2, the grinding rod 3 and the valve disc 6 through the guide sleeve mounting hole 11 of the positioning plate 1; at this time, the guide sleeve 2 is locked in the guide sleeve mounting hole 11, and the right end of the valve disc 6 is in contact with the grinding surface of the diffuser nozzle 7; finally, install the handle 4 in the handle mounting hole 34 of the grinding rod 3; rotating the handle 4 will drive the valve disc 6 to rotate, realizing the grinding operation between the valve disc 6 and the diffuser nozzle 7.

[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0020] The parts of this utility model not described in detail are existing technologies.

Claims

1. A grinding device for a steam turbine valve disc and diffuser nozzle, comprising a positioning plate (1), a guide sleeve (2), a grinding rod (3), a handle (4), a valve disc (6), and a diffuser nozzle (7), characterized in that: The positioning plate (1) is installed on the steam chamber end face of the steam turbine by bolts (5). The guide sleeve (2) is installed in the guide sleeve mounting hole (11) of the positioning plate (1). The axis of the guide sleeve (2) is perpendicular to the end face of the positioning plate (1). The grinding rod (3) is inserted in the center hole (21) of the guide sleeve (2). The grinding rod (3) is coaxial with the guide sleeve (2). One end of the grinding rod (3) is provided with a handle (4). The other end of the grinding rod (3) is connected to the valve disc (6). The other end of the valve disc (6) is in contact with the diffuser nozzle (7).

2. The grinding device for turbine valve discs and diffuser nozzles according to claim 1, characterized in that: The positioning plate (1) is a rectangular flat plate. The center of the end face of the positioning plate (1) is provided with a guide sleeve mounting hole (11), which is a stepped hole. The outer side of the guide sleeve mounting hole (11) is provided with a bolt hole (12), which is a waist-shaped elongated hole.

3. The grinding device for turbine valve discs and diffuser nozzles according to claim 1, characterized in that: The guide sleeve (2) is a round tube, and the central hole (21) of the guide sleeve (2) is adapted to the grinding rod (3); the outer wall (22) of the guide sleeve (2) is adapted to the guide sleeve mounting hole (11).

4. The grinding device for turbine valve discs and diffuser nozzles according to claim 1, characterized in that: The grinding rod (3) consists of a first step shaft (31), a second step shaft (32), and a third step shaft (33) from left to right. The outer diameters of the first step shaft (31) and the third step shaft (33) are smaller than the outer diameter of the second step shaft (32). The left end of the first step shaft (31) is provided with a handle mounting hole (34) for inserting a handle (4). The outer diameter of the second step shaft (32) is adapted to the center hole (21) of the guide sleeve (2). The right end face of the third step shaft (33) is provided with a threaded hole (35). One end of the valve disc (6) is installed in the threaded hole (35).

5. The grinding device for turbine valve discs and diffuser nozzles according to claim 1, characterized in that: The diameter of the guide sleeve mounting hole (11) is greater than the outer diameter of the valve disc (6).

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