JPH0797903A - Wire ring measuring device of steam turbine - Google Patents

Abstract

PURPOSE:To enable measurement without assistance of a person as possible and perform accurate and speedy computation by providing a portable measurement data collection section in which measurement data are collected and stored by an electric micrometer and a measurement data processing section in which a personal computer is used. CONSTITUTION:A measurement data collection section and a measurement data processing section are provided. The measurement data collection section consists of an electric micrometer 5 and a logger 6, and a personal computer is used in the measurement data processing section. The electric micrometer 5 measures an interval between each static section and a piano wire 3 sequentially to output each measurement data in form of electric signals. The logger 6 takes in, collects, and stores each measurement data which is measured by the electric micrometer 5 in form of electric signals and is portable. Also, the measurement data processing section computes and processes the measurement data which are collected by the measurement data collection section and prepares the data which are necessary for centering of a rotary part for the static section to output it to the outside. Consequently, it is possible to avoid any error of a person who measures for the purpose of confirmation and recording.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam turbine wiring measuring device used for centering and assembling steam turbine stationary parts.

[0002]

2. Description of the Related Art The centering of the stationary part of a steam turbine uses a thin piano wire as the centerline of a virtual rotor, measures the distance between the stationary parts from that center, grasps the position with respect to the piano wire, and moves the stationary parts. I am doing the work to bring out the core.

FIG. 3 is a conceptual diagram of the centering of a steam turbine stationary component.

For example, in the centering of the nozzle diaphragm 2 incorporated in the casing 1, the piano wire 3 is stretched so as to pass through a stationary part for centering with reference to a bearing mounting portion for supporting a rotor (not shown). Since the rotor supported by the bearing moves around this point as a fulcrum, the piano wire 3 which is the center line of the virtual rotor is adjusted in its left and right and up and down directions by this bearing portion, and the center of the bearing is adjusted. It is set so that the piano wire comes.

Piano wire 3 for nozzle diaphragm 2
The distance is measured using an inside micrometer for measurement (hereinafter referred to as a micrometer) 4. The micrometer 4 is, as shown in FIG.
a, connecting rod 4b, battery 4c, receiver 4d, end face 4
e, scale 4f.

First, the end portion of the connecting rod 4b is placed on the inner ring of the nozzle diaphragm 2 and the distance is adjusted by turning the measurement dial of the micrometer body 4a to slightly touch the piano wire 3 with the end surface 4e of the micrometer body 4a. . When the piano wire 3 and the end surface 4e of the micrometer main body are slightly touched, a current flows from the battery 4c attached to the micrometer to the piano wire 3 and a conduction sound such as a zigzag sound flows to the receiver 4d. By this, the measurer knows that the piano wire 3 and the micrometer 4 have touched, and at this time, reads the numerical value of the scale 4f of the micrometer 4.

Since this wiring measurement is aimed at the centering of the stationary portion, the piano wire 3 from the left and right and up and down directions.
To position. Further, the nozzle diaphragm 2 which is one of the stationary parts is about 40 to 5 in a large steam turbine.
There are 0 stages, and all of these are performed. In addition to this, parts 10 called packing head and packing casing
There are 20 points, and each of them will measure vertically and horizontally, so
In total, more than 200 measurement points are measured.

Next, the data measured as described above is subjected to the following calculation processing to obtain the position of the core.

First, the measured value is corrected for the amount of bending of the piano wire 3. This is because the piano wire 3 sags due to its own weight, and the measured value is smaller on the lower side and larger on the upper side, so the correction is performed. As shown in FIG. 5, the amount of bending is also related to the weight per unit length of the piano wire 3 and the distance from the fulcrum of the piano wire 3, and the amount of bending is It is obtained by the equation (1).

Deflection amount = k · w · x (L−x) ……………… (1)

Here, w: weight per 1 m of piano wire L: distance between supporting points x: distance to arbitrary measuring point (distance closer to supporting point) k: proportional constant

For example, as shown in FIG. 6, the measured amount U from the upper side is 25.78 mm and the measured value D from the lower side is D =
25.34 mm, measured value from the left side L = 25.62 m
m, and the measured value from the right side is R = 26.50 mm, the position of the core is determined based on this, and as shown in FIG. 7, it is eccentric to the lower side and to the right side.

Therefore, assuming that the amount of deflection is 0.34 mm obtained based on the above equation (1), this amount of deflection is 0.34 m.
From the measured value U = 25.78 mm from the upper side, subtracting U ′ = 25.44 mm and bending amount 0.34 m
m is added to the measurement value D = 25.34 mm from the lower side to correct D ′ = 25.68 mm.

Further, the corrected data shown in FIG.
In order to make it easier to understand the direction and amount toward the center, as shown in FIG. 9, the smaller value of the left and right data is 25.50 mm.
Based on, the difference from that value is taken and summarized.

In this example, the core of the stationary portion is 0.
It is offset by 06 mm, and it is offset by 0.12 mm in the downward direction. Such calculation is performed for all the measurement steps to find the position of the core of each step.

[0016]

However, as described above, the wiring measurement has a large number of measurement points, and another operator is required for measurement and recording, and the calculation processing of the measured data is also a point. Is a time-consuming task.

Further, the worker is measuring and recording,
There is a problem that an error in bending the micrometer 4 or an error in recording on paper occurs.

Therefore, an object of the present invention is to provide a steam turbine wiring measuring device which can perform measurement with minimal manual labor and can perform calculation processing accurately and quickly.

[0019]

According to a first aspect of the present invention, a piano wire is drawn as a center line of a virtual rotor to center a rotor as a rotating part with respect to a stationary part of a steam turbine. In a steam turbine wiring measuring device that sequentially measures the distance to a stationary part, an electric micrometer that sequentially measures the distance between each stationary part and a piano wire and outputs each measurement data as an electric signal, and this electric A portable measurement data collection unit that captures and stores each measurement data measured by an electronic micrometer as an electrical signal, and a calculation process of the measurement data collected by this measurement data collection unit to rotate it with respect to a stationary unit. A measurement data processing unit that creates data necessary for centering the unit and outputs the data to the outside is provided.

According to a second aspect of the present invention, in the steam turbine wiring measuring device according to the first aspect, a logger is used as the measurement data collecting unit and a personal computer is used as the measurement data processing unit.

[0021]

With the above structure, the distance between each stationary portion and the piano wire is sequentially measured by the work of the measuring person who uses the electric micrometer, and each measurement data is output as an electric signal from the electric micrometer. Each measurement data is captured by an electric signal in a portable measurement data collection unit, collected, and stored. The measurement data collected by the measurement data collection unit is subjected to calculation processing by the measurement data processing unit, and data necessary for centering the rotating unit with respect to the stationary unit is created and output to a printer or the like. Conventionally, two measurers were required to check the measurement data and fill in the paper, but one measurer can measure with an electric micrometer and write to the measurement data collection unit. Therefore, it is possible to avoid mistakes made by the measurer for confirmation and recording. In addition, the measurement data processing and recording can be performed accurately and quickly by using the measurement data processing unit.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of a measurement data collecting section of a wiring measuring apparatus showing an embodiment of the present invention, and FIG. 2 is an external view of a measurement data processing section of the wiring measuring apparatus.

In FIG. 1, the measurement data collecting section is composed of an electric micrometer 5 and a logger 6, and a connecting section 5h and a connecting section 6a are connected by a cable 9. The electric micrometer 5 includes a micrometer main body 5a, a connecting rod 5b, a battery 5c, a receiver 5d, an end portion 5e, a converting portion 5f, a display portion 5g, a connecting portion 5h, and a confirmation button 5i.

The logger 6 is portable, and the measurement data measured by the electric micrometer 5 is input from the connection portion 6a by an electric signal to collect and store it in a predetermined format. Output to. Further, the logger 6 is provided with a ten-key 6b for recalling data as necessary, a display section 6c for displaying data, and an interface connecting section 6d for mounting the floppy disk 7.

The personal computer 8 is used as the measurement data processing unit. The personal computer 8 is connected to the printer 10 by the interface connecting unit 7a for mounting the floppy disk 7 and the cable 9 and the printer interface for connecting to the printer 10, which will be described later. And a communication interface 12.

With the above configuration, the measuring member arranges the electric micrometer 5 between the nozzle diaphragm 2 and the piano wire 3 as shown in FIG. 1, and at this time, the micrometer body 5a of the electric micrometer 5 is arranged. Is appropriately rotated so that the tip of the connecting rod 5b of the electric micrometer 5 contacts the nozzle diaphragm 2 and the end 5e contacts the piano wire 3.

As a result, when the electric micrometer 5 comes into contact with the nozzle diaphragm 2 and the piano wire 3, a conduction sound is generated from the receiver 5d. When the measurer opens the conduction sound, the measurer confirms the display on the display unit 5g and presses the confirmation button 5i.

The data measured by the electric micrometer 5 is converted into an electric signal by the converter 5f, input to the logger 6 and stored therein. In general, four points on the upper, lower, left and right sides of one location of the nozzle diaphragm 2 are measured, measured in a predetermined order, and sequentially recorded in the logger 6.

The measurement data recorded in the logger 6 is stored in, for example, a floppy disk 7, and the floppy disk 7 is input as data to the personal computer 8 for calculation processing such as correction.

That is, the data sent to the personal computer 8 corrects the amount of bending of the piano wire 3 obtained by calculation, is arranged by the reference values of the left and right, and outputs the offset of the stationary portion. The printer 10 connected to the personal computer 8 outputs a predetermined output format. At this time, the distance from the support point is required to obtain the amount of bending of the piano wire 3, which is input to the personal computer 8 in advance and used for calculation.

As described above, conventionally, two workers were required to check the measurement data and enter the records, but one worker can perform the measurement, confirmation, and writing to the logger 6 instead of the recording. In addition, there is an effect that data processing and recording can be performed accurately and quickly by using a personal computer.

The receiver is not limited to this embodiment, and is for confirming the conduction sound between the piano wire and the main body of the micrometer with the ear as in the prior art. Instead of the receiver, for example, It is also possible to provide a lamp such as a light emitting diode for visual confirmation.

Data transfer from the logger 6 to the personal computer 8 can be performed in an environment where there is no electrical noise source.
It can also be performed by wireless communication via the communication interface 12.

Further, the logger 6 has a function of generating an alarm when the measured values of adjacent or the same stationary parts and data separated by a certain value or more come in. As a result, the data transferred to the logger 6 by mistake can be checked, measured again, and rewritten.

A system in which data is sent directly from the electric micrometer 5 to the personal computer 8 without using the logger 6 is also conceivable. In this case, however, since the personal computer 8 is installed far away from the measurer, It is difficult for the measurer to directly check the data in the personal computer at the same time as measuring. Therefore, if the measured value is inconvenient, the data or output of the personal computer must be checked. In the case of the present embodiment, these inconvenient measured values can be found before the final output by confirming in the carried logger.

[0037]

As described above, according to the present invention, the distance between each stationary portion and the piano wire is sequentially measured, and each measurement data is fetched by an electric signal into a portable measurement data collecting unit and collected and stored. The measurement data processing unit performs calculation processing to generate data necessary for centering the rotating unit with respect to the stationary unit, and outputs the data to a printer or the like. Therefore, the labor of the measurer is greatly reduced, and the mistake of the measurer for confirmation and recording can be avoided. In addition, the measurement data processing and record creation are accurate and
Can be done quickly.

[Brief description of drawings]

FIG. 1 is an external view of a measurement data collecting unit included in a wiring measuring device according to an embodiment of the present invention.

FIG. 2 is an external view of a measurement data processing unit included in a wiring measuring device according to an embodiment of the present invention.

FIG. 3 is a conceptual diagram of wiring measurement.

FIG. 4 is an external view of a conventional wiring measurement.

FIG. 5 is an explanatory diagram for correcting a bending amount of a piano wire.

FIG. 6 is an explanatory diagram showing a first example of processing of measurement data.

FIG. 7 is an explanatory diagram showing a second example of measurement data processing.

FIG. 8 is an explanatory diagram showing a third example of processing of measurement data.

FIG. 9 is an explanatory diagram showing a fourth example of measurement data processing.

[Explanation of symbols]

 1 Casing 2 Nozzle Diaphragm 3 Piano Wire 5 Electric Micrometer 5a Micrometer Main Body 5b Connection Rod 5c Battery 5d Receiver 5e End 5f Converter 5g Display 5h Connection 5i Confirmation Button 6 Logger 6a Connection 6b Numeric Keypad 6c Display 6d Interface connection part 7 Floppy disk 7a Interface connection part 8 Personal computer 10 Printer

Claims (2)

[Claims] 1. A piano wire is drawn as a center line of a virtual rotor to center a rotor as a rotating part with respect to a stationary part of a steam turbine, and a distance between the piano wire and each stationary part is sequentially measured. In a steam turbine wiring measuring device, an electric micrometer that sequentially measures the distance between each stationary portion and the piano wire and outputs each measurement data as an electric signal, and each measurement measured by this electric micrometer A portable measurement data collecting unit that captures and collects data as an electric signal, and data necessary for centering the rotating unit with respect to the stationary unit by calculating the measurement data collected by the measurement data collecting unit. And a measurement data processing unit for producing and outputting the data to the outside. 2. The measurement data collecting unit uses a logger,
The wiring measurement device for a steam turbine according to claim 1, wherein the measurement data processing unit uses a personal computer.