CN217653042U

CN217653042U - Positioning and mounting device for turbine guide ring

Info

Publication number: CN217653042U
Application number: CN202221620645.1U
Authority: CN
Inventors: 郭晓康; 付乐; 王浩磊; 刘春蓉
Original assignee: Yichang Marine Diesel Engine Co ltd
Current assignee: Yichang Marine Diesel Engine Co ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2022-10-25
Anticipated expiration: 2032-06-27

Abstract

A positioning and mounting device of a turbine guide ring comprises an eccentric pin and an eccentric bushing, wherein the eccentric pin comprises a cylindrical pin body, one end of the pin body is provided with an eccentric part, the other end of the pin body is provided with a driving part, the eccentric bushing comprises a bushing body, an eccentric hole which penetrates through the bushing body is axially arranged in the bushing body, and the axis of the eccentric hole deviates from the axis of the peripheral surface of the bushing body; the eccentric pin is arranged in the eccentric hole, and the pin body is matched with the eccentric hole; the eccentric part is of a cylindrical structure, the diameter of the eccentric part is smaller than that of the pin body, and the axis of the eccentric part deviates from that of the pin body. Adopt eccentric round pin and eccentric bush combination, it is bigger than the adjustable range who uses eccentric locating pin alone, consequently through the eccentric combination in two directions of eccentric round pin and eccentric bush, satisfy the assembly demand. Has the characteristics of simple structure and convenient installation.

Description

Positioning and mounting device for turbine guide ring

Technical Field

The utility model relates to a steam turbine technical field especially relates to a location installation device of turbine water conservancy diversion ring.

Background

When the turbine guide ring of the low-pressure cylinder of the steam turbine is assembled in a trial mode, the guide ring needs to be assembled on the low-pressure cylinder in a half-split mode due to the elastic structure of the turbine guide ring. The assembly and fixation between the guide ring and the low pressure cylinder needs to install 32 connecting bolts, but the guide ring structure has large elastic deformation, and the guide rings are used as air inlet parts of the low pressure cylinder and are distributed at the front end and the rear end of the low pressure cylinder, so that the guide ring needs to be vertically assembled during assembly, the guide ring is lifted to be attached to the low pressure cylinder in the air, the assembly is carried out in the state, the elastic deformation of the guide ring continuously causes the change of the bolt hole positions, and the difficulty in successfully combining 32 bolts is very high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the problem that exists among the above-mentioned background art is solved, a simple structure is provided, simple to operate's turbine guide ring's location installation device.

In order to realize the technical characteristics, the purpose of the utility model is realized as follows: a positioning and mounting device of a turbine guide ring comprises an eccentric pin and an eccentric bushing, wherein the eccentric pin comprises a cylindrical pin body, one end of the pin body is provided with an eccentric part, the other end of the pin body is provided with a driving part, the eccentric bushing comprises a bushing body, an eccentric hole which penetrates through the bushing body is axially arranged in the bushing body, and the axis of the eccentric hole deviates from the axis of the peripheral surface of the bushing body; the eccentric pin is arranged in the eccentric hole, and the pin body is matched with the eccentric hole; the eccentric part is of a cylindrical structure, the diameter of the eccentric part is smaller than that of the pin body, and the axis of the eccentric part deviates from that of the pin body.

The end face of the eccentric part is positioned in the end face of the pin body, and the excircle of the end face of the eccentric part is tangent to the excircle of the pin body.

The driving part is a polygonal boss extending out of the pin body.

The boss is quadrilateral.

The end face of the bushing body is provided with at least two adjusting holes at the outer side of the eccentric hole.

Chamfers are arranged at the end part of the eccentric part and/or the two ends of the eccentric hole.

The utility model discloses there is following beneficial effect:

1. eccentric round pin and eccentric bush can both rotate alone and form the effect of skew, adopt eccentric round pin and eccentric bush combination, and the skew effect will add and subtract to can adjust simultaneously in X, two sides of Y, but adjusting range is bigger, satisfies the assembly demand, simple structure, simple to operate.

2. The end face of the eccentric part is positioned in the end face of the pin body, the excircle of the end face of the eccentric part is tangent to the excircle of the pin body, the installation is convenient, the eccentric pin can be conveniently inserted into the eccentric bushing, and the final disassembly is convenient.

3. The driving part is a polygonal boss extending out of the pin body. It is convenient to be screwed by a wrench and a special tool for manufacturing.

4. The end face of the bushing body is provided with two adjusting holes at the outer side of the eccentric hole, so that a tool can be conveniently clamped into the adjusting holes to rotate the eccentric bushing.

5. The problem of overlarge deviation of corresponding holes is effectively solved by using the mode of combined positioning of the eccentric positioning pin and the eccentric bushing, meanwhile, the size of the opening of the annular workpiece can be adjusted easily, the time spent on assembly is greatly shortened, the posture and the hole position coordinates of the workpiece can be adjusted well, other bolts can be fastened smoothly, and the assembly efficiency and the assembly effect are greatly improved by adopting the method.

Drawings

Fig. 1 is a schematic view of the three-dimensional structure of the present invention.

Fig. 2 is a schematic view of the three-dimensional structure of the eccentric pin of the present invention.

Fig. 3 is a schematic view of the three-dimensional structure of the eccentric bushing of the present invention.

Fig. 4 is a schematic view of the eccentric adjustment position of the positioning device of the present invention.

Fig. 5 is a schematic view of the eccentric adjustment position of the positioning device of the present invention.

Fig. 6 is a schematic diagram of the eccentric adjustment position of the positioning device according to the present invention.

Fig. 7 is a schematic view of the eccentric adjustment position of the positioning device according to the present invention.

Fig. 8 is a schematic diagram of the eccentric adjustment Y-direction offset range of the positioning device according to the present invention.

Fig. 9 is a schematic diagram of the eccentric adjustment of the positioning device of the present invention in the range of X-direction shift.

In the figure: the eccentric pin 10, the pin body 11, the eccentric part 12, the driving part 13, the eccentric bush 20, the bush body 21, the eccentric hole 22 and the adjusting hole 23.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

The first embodiment is as follows:

referring to fig. 1-3, a positioning and mounting device for a turbine flow deflector ring comprises an eccentric pin 10 and an eccentric bushing 20, wherein the eccentric pin 10 comprises a cylindrical pin body 11, one end of the pin body 11 is provided with an eccentric part 12, the other end is provided with a driving part 13, the eccentric bushing 20 comprises a bushing body 21, an eccentric hole 22 which penetrates through the bushing body 21 is axially arranged in the bushing body 21, and the axis of the eccentric hole 22 deviates from the axis of the outer peripheral surface of the bushing body 21; the eccentric pin 10 is arranged in the eccentric hole 22, and the pin body 11 is matched with the eccentric hole 22; the eccentric part 12 is a cylindrical structure, the diameter of the eccentric part 12 is smaller than that of the pin body 11, and the axis of the eccentric part 12 deviates from the axis of the pin body 11. The combination of the eccentric pin 10 and the eccentric bushing 20 is adopted, the adjustable range is larger than that of the eccentric positioning pin which is used independently, and the hole position deviation caused by deformation can only generate deviation in the transverse direction or the longitudinal direction and is often provided with deviation in two directions because the installation hole position of the guide ring is positioned on the circular flange. Thus, the assembling requirement is satisfied by the eccentric combination of the eccentric pin 10 and the eccentric bush 20 in both directions.

Referring to fig. 4-9, the eccentric portion 12 is used as a center of a circle in cooperation with a pin hole of the low pressure cylinder because the position of the assembling pin hole of the low pressure cylinder is accurate. Referring to fig. 4 to 7, O is a center of the eccentric portion 12, and the eccentric portion 12 is installed in the pin hole of the low pressure cylinder, so that the O point position is constant when the eccentric pin 10 is rotated. O' is the center of the pin body 11, and since it is deviated from O, the pin body 11 rotates about point O when the eccentric pin 10 rotates. When only the eccentric bushing 20 is rotated, since the inner hole of the eccentric bushing 20 is installed on the cylinder of the eccentric pin body 11, the position of the center of the eccentric hole 22 of the eccentric bushing 20 does not change, and the center O ″ of the outer circle of the eccentric bushing 20 is rounded around O'. Therefore, when the eccentric pin 10 and the eccentric bushing 20 can be rotated independently to form the offset effect, and when they are combined together, the offset effect is increased or decreased, so that the adjustable range is larger. Referring to fig. 8, the driving part 13 alone rotates the eccentric pin 10 to form a Y-direction deviation range of up-and-down adjustment; referring to fig. 9, the eccentric bushing 20 is rotated alone to form an X-direction offset range for left and right adjustment. Therefore, when assembling the guide ring 30, the eccentric pin 10 and the eccentric bushing 20 need to be rotated simultaneously, so as to ensure that the eccentric pin 10 and the eccentric bushing 20 can be inserted into the positioning hole 31 of the low pressure cylinder and the guide ring of the turbine of the steam turbine. When the bolt 40 is positioned and installed, the driving part 13 of the rotating eccentric pin 10 is adjusted to ensure that the bolt 40 is smoothly inserted into the guide ring and the bolt hole of the low-pressure cylinder.

In a preferred scheme, referring to fig. 2, the end face of the eccentric part 12 is located in the end face of the pin body 11, the outer circle of the end face of the eccentric part 12 is tangent to the outer circle of the pin body 11, so that the installation is convenient, and the eccentric pin 10 can be conveniently inserted into the eccentric bushing 20, and the final disassembly is also convenient. When the end face of the eccentric part 12 is positioned outside the end face of the pin body 11, the adjustable range is larger, but the diameter of the driving part 13 can only be reduced at the moment, the eccentric part is sleeved in the driving part 13, and the eccentric part needs to be integrally disassembled during disassembly, so that the difficulty is higher.

In a preferred embodiment, referring to fig. 2, the driving portion 13 is a polygonal boss protruding from the pin body 11. It is convenient to be screwed by a wrench and a special tool for manufacturing.

Furthermore, the boss is quadrilateral, and processing is facilitated. Of course, the boss may be hexagonal and may be used with a socket ratchet wrench.

In a preferred embodiment, referring to fig. 3, the end face of the bushing body 21 is provided with two adjusting holes 23 on the outer side of the eccentric hole 22. The adjusting hole 23 is a blind hole, so that a tool can be conveniently clamped into the adjusting hole 23, the eccentric bushing 20 is rotated,

in a preferred embodiment, the end of the eccentric portion 12 and/or the two ends of the eccentric hole 22 are/is chamfered. Facilitating insertion into the positioning hole 31.

The utility model discloses a working process and principle:

the low-pressure cylinder of the steam turbine is lifted, the mounting planes on two sides of the low-pressure cylinder of the steam turbine are perpendicular to the ground, the mounting plane of the turbine flow guide ring is attached to the mounting plane of the low-pressure cylinder of the steam turbine, the eccentric pin 10 is mounted in the eccentric bushing 20, the assembly is placed in the positioning hole, in the placing process, the eccentric pin 10 and the eccentric bushing 20 are clamped into the driving portion 13 and the adjusting hole 23 through tools and screwed, and the eccentric pin 10 and the eccentric bushing 20 are rotatably mounted in the positioning hole in the arc top end of the turbine flow guide ring and the low-pressure cylinder of the steam turbine. The eccentric pin 10 and the eccentric bush 20 are rotated to adjust the positions of the bolt holes 32 on both sides of the positioning hole 31, and after alignment, the bolts on both sides of the positioning hole 31 on the top are preliminarily installed. And then respectively installing the eccentric pin 10 and the eccentric bush 20 in the positioning holes at the two sides of the lower part of the turbine guide ring, continuously rotating the eccentric pin 10 and the eccentric bush 20, and sequentially installing bolts on the bolt holes from top to bottom. Finally, all the bolts are tightened, so that the turbine guide ring 30 is fixedly connected with the low-pressure cylinder of the steam turbine.

Claims

1. The utility model provides a location installation device of turbine water conservancy diversion ring which characterized in that: the eccentric pin comprises an eccentric pin (10) and an eccentric bushing (20), wherein the eccentric pin (10) comprises a cylindrical pin body (11), one end of the pin body (11) is provided with an eccentric part (12), the other end of the pin body is provided with a driving part (13), the eccentric bushing (20) comprises a bushing body (21), an eccentric hole (22) which penetrates through the bushing body (21) is axially arranged in the bushing body (21), and the axis of the eccentric hole (22) deviates from the axis of the outer peripheral surface of the bushing body (21); the eccentric pin (10) is arranged in the eccentric hole (22), and the pin body (11) is matched with the eccentric hole (22); the eccentric part (12) is of a cylindrical structure, the diameter of the eccentric part (12) is smaller than that of the pin body (11), and the axis of the eccentric part (12) deviates from the axis of the pin body (11).

2. The apparatus of claim 1, wherein the means for positioning and mounting the turbine diaphragm comprises: the end face of the eccentric part (12) is positioned in the end face of the pin body (11), and the excircle of the end face of the eccentric part (12) is tangent to the excircle of the pin body (11).

3. The apparatus of claim 1, wherein the means for positioning and mounting the turbine diaphragm comprises: the driving part (13) is a polygonal boss extending out of the pin body (11).

4. The apparatus of claim 3, wherein the means for positioning and mounting the turbine diaphragm comprises: the boss is quadrilateral.

5. The apparatus of claim 1, wherein the means for positioning and mounting the turbine diaphragm comprises: the end face of the bushing body (21) is provided with at least two adjusting holes (23) at the outer side of the eccentric hole (22).

6. The apparatus of claim 1, wherein the means for positioning and mounting the turbine diaphragm comprises: the end part of the eccentric part (12) and/or the two ends of the eccentric hole (22) are/is provided with chamfers.