阅读说明：本技术 零轴承支撑中压缸假瓦拆除时动静位置测量工装、方法 (Tool and method for measuring moving and static positions of zero-bearing supported intermediate pressure cylinder during false tile removal ) 是由 姚红起 赵原东 王新举 王凯 焦文奇 李彭涛 赵双龙 于 2021-06-29 设计创作，主要内容包括：本公开涉及汽轮机安装技术领域,具体的涉及零轴承支撑中压缸假瓦拆除时动静位置测量工装、方法。本发明公开了一种零轴承支撑中压缸假瓦拆除时动静位置测量工装,包括定位弧块,定位弧块通过螺栓固定安装于中压缸端部的汽封体上。能够避免在中压缸与轴承箱之间狭小的空间内使用百分表测量中压缸与转子之间的径向间隙,直接测量定位弧块与转子之间的径向间隙即可。(The disclosure relates to the technical field of steam turbine installation, in particular to a tool and a method for measuring moving and static positions when a false tile of a zero bearing support intermediate pressure cylinder is detached. The invention discloses a tool for measuring moving and static positions when a false tile of a zero bearing support medium pressure cylinder is dismounted. The radial clearance between the intermediate pressure cylinder and the rotor can be prevented from being measured by using a dial indicator in a narrow space between the intermediate pressure cylinder and the bearing box, and the radial clearance between the positioning arc block and the rotor can be directly measured.)

1. The zero bearing supports sound position measurement frock when the false tile of intermediate pressure cylinder is demolishd, its characterized in that, including the location arc piece, the location arc piece passes through bolt fixed mounting on the gland casing of intermediate pressure cylinder tip.

2. The tool for measuring the dynamic and static positions of the middle pressure cylinder with the zero bearing support false tile removed as claimed in claim 1, wherein the positioning arc blocks are distributed in an annular array on the end face of the gland casing at the end of the middle pressure cylinder.

3. The tool for measuring the dynamic and static positions of the middle pressure cylinder with the zero bearing support as claimed in claim 1, wherein the gland sealing body at the end of the middle pressure cylinder is provided with a light hole.

4. The tool for measuring the moving and static positions of the zero-bearing supported intermediate pressure cylinder during the removal of the false tile as claimed in claim 1, wherein the positioning arc block is provided with mounting holes, the mounting holes comprise a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are threaded through holes.

5. The tool for measuring the dynamic and static positions of the zero-bearing supported intermediate pressure cylinder during the removal of the false tile as claimed in claim 1, wherein the size and the position of the unthreaded hole respectively correspond to the positions of the mounting holes of the positioning arc blocks.

6. The tool for measuring the moving and static positions of the dummy shoe of the zero-bearing supported intermediate pressure cylinder in the removal process of claim 1, wherein the positioning arc block comprises a front positioning block and a rear positioning block, and the rear positioning block is in contact connection with a steam seal body at the end part of the intermediate pressure cylinder.

7. The method for measuring the moving and static positions of the zero bearing support intermediate pressure cylinder during the removal of the false tile is characterized in that based on the tool for measuring the moving and static positions of the zero bearing support intermediate pressure cylinder during the removal of the false tile, the method comprises the following specific steps:

step 1: drilling a unthreaded hole on a gland casing at the end part of the intermediate pressure cylinder;

step 2: mounting the positioning arc block on a gland casing at the end part of the intermediate pressure cylinder;

and step 3: before the false tile is removed, measuring the radial minimum distance between the positioning arc block and the rotor through an inside micrometer;

and 4, step 4: measuring the radial minimum distance between the positioning arc block and the rotor through an inside micrometer after the false tile is removed;

and 5: and comparing the distance values between the positioning arc block and the rotor measured twice before and after the false tile is removed to obtain the radial variation of the dynamic and static gaps of the intermediate pressure cylinder before and after the false tile is removed.

8. The method for measuring the dynamic and static positions of the middle pressure cylinder with the zero bearing support as claimed in claim 7, wherein in the step 1, the unthreaded holes are uniformly distributed along the circumferential direction of the gland casing at the end part of the middle pressure cylinder, and the mounting holes of the positioning arc blocks are connected with the unthreaded holes through bolts.

9. The method for measuring the dynamic and static positions of the middle pressure cylinder with the dummy shoe supported by the zero bearing as claimed in claim 7, wherein the positioning arc blocks in the step 2 are uniformly distributed in the circumferential direction of the gland casing at the end part of the middle pressure cylinder.

10. The method for measuring dynamic and static positions of a zero bearing support intermediate pressure cylinder dummy shoe when removed as set forth in claim 7, wherein the dummy shoe is fixed to a bearing housing of the rotor by a jackscrew for supporting the rotor.

Technical Field

The disclosure relates to the technical field of steam turbine installation, in particular to a tool and a method for measuring moving and static positions when a false tile of a zero bearing support intermediate pressure cylinder is detached.

Background

In the current domestic steam turbine models, the design of a steam turbine intermediate pressure cylinder is mostly in a double-bearing support mode and a single-bearing support mode. Need not installation false tile (support frock temporarily) to the duplex bearing support intermediate pressure cylinder, support the intermediate pressure cylinder to the single bearing: one end of the medium-pressure rotor is supported on the bearing, and the other end of the medium-pressure rotor is supported on the high-pressure rotor by the concave-convex spigot, so that a false tile (temporary support tool) does not need to be installed.

After the turbine zero bearing supports the intermediate pressure cylinder rotor and the wheel connection is completed, when the false tile is removed, the modified dial indicator (erected on the intermediate pressure outer cylinder and the pointer of the indicator points to the intermediate pressure rotor) is used for measuring the difference value before and after the false tile is removed in the horizontal direction and the vertical direction at the adjusting end and the electric end of the intermediate pressure cylinder respectively.

At present, the method using the dial indicator for measurement has the following defects:

1. the clearance between intermediate pressure jar and the bearing box is narrow and small, and the bearing box is located between intermediate pressure jar and the high pressure promptly, need to reform transform the percentage table and just can measure the radial clearance between intermediate pressure jar and the intermediate pressure rotor.

2. The pointer of the modified dial indicator is too long and easy to bend, and has a large influence on measurement data.

3. In the construction process, the dial indicator has high use requirement, the dial indicator cannot be touched on a clamping frame which is fixed and reliable, the measuring result of the surface with roughness or uneven surface can be inaccurate, the measuring rod is perpendicular to the central line of a workpiece when the cylindrical workpiece is measured, and constructors can easily touch the dial indicator to influence the accuracy of data.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide the tool and the method for measuring the dynamic and static positions of the middle pressure cylinder after the false tile is removed by using the bearing support, so that the radial clearance between the middle pressure cylinder and the rotor before and after the false tile is removed can be prevented from being measured by using a dial indicator, the measuring process can be simplified, the installation period can be shortened, and the dynamic and static clearance change of the middle pressure cylinder after the false tile is removed can be accurately measured.

In order to achieve the above object, one or more embodiments of the present invention provide the following technical solutions:

the invention discloses a tool for measuring moving and static positions when a false tile of a zero bearing support medium pressure cylinder is dismounted.

According to the further technical scheme, the positioning arc blocks are distributed on the end face of the gland casing at the end part of the intermediate pressure cylinder in an annular array mode.

According to a further technical scheme, a steam seal body at the end part of the intermediate pressure cylinder is provided with a unthreaded hole.

According to the technical scheme, the positioning arc block is provided with mounting holes, the mounting holes comprise a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are threaded through holes.

According to a further technical scheme, the size and the position of the unthreaded hole respectively correspond to the positions of the mounting holes of the positioning arc blocks.

According to the further technical scheme, the positioning arc block comprises a front positioning block and a rear positioning block, and the rear positioning block is in contact connection with a steam seal body at the end part of the intermediate pressure cylinder.

The invention also discloses a dynamic and static position measuring method when the false tile of the zero bearing support intermediate pressure cylinder is removed, and the dynamic and static position measuring tool based on the invention when the false tile of the zero bearing support intermediate pressure cylinder is removed specifically comprises the following steps:

step 1: drilling a unthreaded hole on a gland casing at the end part of the intermediate pressure cylinder;

step 2: mounting the positioning arc block on a gland casing at the end part of the intermediate pressure cylinder;

and step 3: before the false tile is removed, measuring the radial minimum distance between the positioning arc block and the rotor by an inside micrometer;

and 4, step 4: measuring the radial minimum distance between the positioning arc block and the rotor through an inside micrometer after the false tile is removed;

and 5: and comparing the radial direction distance values between the positioning arc block and the rotor measured twice before and after the false tile is removed to obtain the radial variation of the dynamic and static gaps of the intermediate pressure cylinder before and after the false tile is removed.

According to a further technical scheme, in the step 1, the unthreaded holes are uniformly distributed along the circumferential direction of the gland casing at the end part of the intermediate pressure cylinder, and the mounting holes of the positioning arc blocks are connected with the unthreaded holes through bolts.

According to the further technical scheme, the positioning arc blocks in the step 2 are uniformly distributed in the circumferential direction of the gland sealing body at the end part of the intermediate pressure cylinder.

According to the further technical scheme, the false tile is fixed on a bearing seat of the rotor through a jackscrew and used for supporting the rotor.

The beneficial effects of one or more technical schemes are as follows:

1. the zero bearing supports the dynamic and static position measuring tool when the false tile of the intermediate pressure cylinder is removed, so that the radial clearance between the intermediate pressure cylinder and the rotor before and after the false tile is removed can be prevented from being measured in a narrow space between bearing seats erected between the intermediate pressure cylinder and a bearing box, and the bearing box is positioned between the intermediate pressure cylinder and a high pressure cylinder; and moreover, the dial indicator does not need to be improved. The method can accurately obtain the gap variation by directly measuring the radial gap between the positioning arc block of the intermediate pressure cylinder and the rotor, and has the advantages of complex installation of the dial indicator and complex use environment.

2. The dynamic and static position measuring tool can be installed on a steam turbine as permanent equipment when the bearing supporting medium pressure cylinder false tile is detached, and can be used during maintenance, and dynamic and static clearance change of the medium pressure cylinder after the equipment runs for a period of time can be analyzed.

3. The method for measuring the dynamic and static positions of the zero-bearing supported intermediate pressure cylinder during the removal of the false tile can accurately measure the dynamic and static clearance change of the intermediate pressure cylinder after the removal of the false tile, ensure that the vibration of the steam turbine is in a good range, and ensure the safety and the economic benefit of the unit.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a side view of the overall structure of the present invention;

FIG. 2 is an elevational view of the overall construction of the present invention;

in the figure, the device comprises a positioning arc block 1, a positioning arc block 2, a bolt 3, a limiting support table 4, a middle pressure cylinder end steam seal body 5, a front positioning block 6 and a rear positioning block.

Detailed Description

Example 1

Referring to fig. 1-2, the invention discloses a dynamic and static position measuring tool for removing a false tile of a zero bearing supported intermediate pressure cylinder, which comprises a positioning arc block, wherein the positioning arc block is fixed on a gland seal body at the end part of the intermediate pressure cylinder through a bolt.

The positioning arc blocks are in an annular matrix by taking the axis of the intermediate pressure cylinder as the center, and are positioned at least at 6 positions on the gland sealing body at the end part of the intermediate pressure cylinder.

As shown in fig. 2, for the sake of clarity of description, the present embodiment is expressed by the orientation shown in fig. 2, the upper end surface and the lower end surface of the positioning arc block are in the structure of arc surfaces, and the center of the arc coincides with the center of the section of the intermediate pressure cylinder. The left end surface and the right end surface of the positioning arc block are of a plane structure.

The gland casing at the end part of the intermediate pressure cylinder is provided with a unthreaded hole, and the size and the position of the unthreaded hole respectively correspond to the positions of the mounting holes of the positioning arc blocks. The preceding terminal surface of location arc piece is provided with two mounting holes, and the mounting hole uses the axis of intermediate pressure jar as central symmetry setting on location arc piece, and the mounting hole marks respectively and is first mounting hole and second mounting hole, and first mounting hole and second mounting hole are for setting up internal screw thread through-hole, and the bolt passes first mounting hole, the unthreaded hole on the gland casing respectively, and the unthreaded hole on second mounting hole, the gland casing will fix a position the arc piece and install on the terminal surface of the gland casing of intermediate pressure jar tip.

The positioning arc block comprises a front positioning block and a rear positioning block, the front positioning block and the rear positioning block are completely the same in shape, and the rear positioning block is in contact connection with a steam seal body at the end part of the intermediate pressure cylinder. As shown in fig. 1, the positions of the front positioning block and the rear positioning block are described in the orientation shown in fig. 1, which is only for clarity, and the specific application process is not limited by the orientation of the embodiment. The upper end face of the front positioning block is higher than the upper end face of the rear positioning block, the lower end face of the front positioning block is lower than the lower end face of the rear positioning block, and the overall height dimension of the rear positioning block is smaller than that of the front positioning block. As shown in fig. 2, the left end face and the right end face of the front positioning block and the rear positioning block are in the same plane.

M12 x 60 hexagon head bolts are installed in the first installation holes and the second installation holes. M12 is crossed 60 hexagon head spiral shell and is run through first mounting hole, second mounting hole, is connected the location arc piece with intermediate pressure cylinder tip gland casing.

Example 2

Referring to fig. 1-2, the invention discloses a dynamic and static position measuring method when a dummy tile of a zero bearing support intermediate pressure cylinder is removed, and the dynamic and static position measuring tool based on the invention when the dummy tile of the zero bearing support intermediate pressure cylinder is removed comprises the following specific steps:

step 1: drilling a unthreaded hole on a gland casing at the end part of the intermediate pressure cylinder;

step 2: mounting the positioning arc block on a gland casing at the end part of the intermediate pressure cylinder;

and step 3: before the false tile is removed, measuring the minimum distance between the positioning arc block and the rotor by an inside micrometer;

and 4, step 4: measuring the radial minimum distance between the positioning arc block and the rotor through an inside micrometer after the false tile is removed;

and 5: and comparing the radial distance values between the positioning arc block and the rotor measured twice before and after the false tile is removed to obtain the radial variation of the dynamic and static gaps of the intermediate pressure cylinder before and after the false tile is removed.

Before the step 1, the false tile is arranged between the steam seal body at the end part of the intermediate pressure cylinder and the rotor, the false tile is of a temporary supporting structure, and one end of the false tile is fixed on a bearing seat of the rotor through a jackscrew and is used for supporting the rotor.

In the step 1, the unthreaded holes are located on the end face of the gland casing at the end part of the intermediate pressure cylinder and are arrayed along the axis of the intermediate pressure cylinder in an annular mode.

In the step 2, the positioning arc blocks are uniformly arranged along the circumferential direction of the gland casing at the end part of the intermediate pressure cylinder.

In the step 2, the mounting hole of the positioning arc block is connected with the unthreaded hole through a bolt, so that the positioning arc block is connected with the steam seal body at the end part of the intermediate pressure cylinder.

The structure of the false tile is not limited by the embodiment as long as it can support the rotor.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.