CN214702023U

CN214702023U - Centering tool for low-pressure inner cylinder and rotor of steam turbine

Info

Publication number: CN214702023U
Application number: CN202121391366.8U
Authority: CN
Inventors: 王海笑; 张西安; 白本伟; 王雪顺; 郇团结
Original assignee: PowerChina Henan Engineering Co Ltd
Current assignee: PowerChina Henan Engineering Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-11-12
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a centering tool for a low-pressure inner cylinder and a rotor of a steam turbine, which comprises a U-shaped clamp and a dial indicator, wherein the right end of the U-shaped clamp is provided with a connecting column, and a displacement block is sleeved on the connecting column; a second screw rod is inserted into the upper part of the displacement block and is fixed through a nut; the right end of the second screw is connected with a dial indicator through a clamp; a first nut is arranged at the left end of the U-shaped clamp, a first screw rod is inserted into the first nut, and second nuts are connected to the screw rods above and below the first nut through threads respectively; a rubber pad is arranged in the U-shaped clamp. The utility model discloses the locating work in looking for of jar and rotor in the completion low pressure that can be quick, accurate has reduced job site hoist and mount rotor, the work of the first and second of combination low pressure inner casing, has improved the precision of looking for, convenient to use, easy operation easily promotes.

Description

Centering tool for low-pressure inner cylinder and rotor of steam turbine

The technical field is as follows:

the utility model relates to a find well instrument, in particular to instrument is looked for with rotor in steam turbine low pressure inner casing.

Background art:

the existing traditional steam turbine low-pressure inner cylinder and rotor finding method generally adopts a glue rolling cloth/lead pressing wire mode to measure the steam seal gap between the rotor and the low-pressure inner cylinder, the mode needs to combine the upper half and the lower half of the low-pressure inner cylinder for many times, and needs to enter and exit the rotor for many times, which consumes manpower and construction period, and the final result depends on the construction experience of workers; in recent years, the total clearance between the inner cylinder and the rotor is determined by adopting the low-pressure inner cylinder and the rotor collision cylinder, but the rotor is difficult to ensure to return to a required state when recovery is carried out, and the mode needs a plurality of persons to work in a matching way, so that the final result has larger error, and the error depends on the matching degree between constructors.

The utility model has the following contents:

the utility model discloses the technical problem that will solve is: the defects of the prior art are overcome, the centering tool for the low-pressure inner cylinder and the rotor of the steam turbine is provided, centering and positioning work of the low-pressure inner cylinder and the rotor can be completed more quickly and accurately, work of hoisting the rotor and combining the upper half and the lower half of the low-pressure inner cylinder on a construction site is reduced, and centering accuracy is improved.

The utility model discloses a technical scheme who solves technical problem and take is:

a centering tool for a low-pressure inner cylinder and a rotor of a steam turbine comprises a U-shaped clamp and a dial indicator, wherein a connecting column is arranged at the right end of the U-shaped clamp, a displacement block is sleeved on the connecting column, and the displacement block is fixedly connected with the connecting column through a bolt; a second screw rod is inserted into the upper part of the displacement block and is fixed through a nut; the right end of the second screw is connected with a dial indicator through a clamp; the left end of the U-shaped clamp is provided with two first nuts; a first screw rod is inserted into the first nut, and second nuts are respectively connected to the screw rods above and below the first nut through threads; a rubber pad is arranged in the U-shaped clamp.

The inner diameter of the first nut is larger than the outer diameter of the first screw rod, and the first screw rod can move up and down in the first nut.

The rubber pads are two and are respectively positioned on the upper end face and the lower end face of the interior of the U-shaped clamp.

The displacement block can move along the connecting column, a bolt is arranged at the bottom of the displacement block, and the displacement block is tightly propped against the connecting column through the bolt.

A through hole is dug in the upper part of the displacement block, a second screw rod is inserted into the through hole, and matched nuts are respectively arranged on the second screw rods on the two sides of the displacement block; the second screw rods and the connecting columns are distributed in parallel;

the fixture is a hoop, and the lower end of the dial indicator is inserted into the hoop and fixed through bolts and nuts.

The utility model discloses an actively beneficial effect is:

1. the utility model discloses a set up the rubber mat in the U type presss from both sides, avoid the blade of rotor to be damaged in the instrument installation, through set up the second nut on the first screw rod of U type clamp left end, can press from both sides the U type and fix on the blade through the second nut, convenient to use, easy operation easily promotes.

2. The utility model is arranged at the blade top position and the blade root position of the last-stage blade at the two ends of the low-pressure rotor of the steam turbine, when in use, the rotor is only required to be coiled, and the data of the upper angle, the lower angle, the left angle and the right angle are recorded to obtain the position of the rotor; the upper half of the rotor and the lower pressure inner cylinder do not need to be hoisted for multiple times, too many workers do not need to be matched, the obtained data is accurate and visual, the construction labor intensity is greatly reduced, and the construction period is shortened.

Description of the drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a perspective view of the two ends of the U-shaped clip of the present invention.

The specific implementation mode is as follows:

the invention will be further explained and explained with reference to the drawings, in which:

referring to fig. 1-2, a centering tool for a low-pressure inner cylinder and a rotor of a steam turbine comprises a U-shaped clamp 1 and a dial indicator 3, wherein a connecting column 2 is arranged at the right end of the U-shaped clamp 1, a displacement block 8 is sleeved on the connecting column 2, and the displacement block 8 is fixedly connected with the connecting column 2 through a bolt 11; a second screw 9 is inserted into the upper part of the displacement block 8 and is fixed through a nut; the right end of the second screw 9 is connected with a dial indicator 3 through a clamp 10; the left end of the U-shaped clamp 1 is provided with two first nuts 5; a first screw rod 4 is inserted into the first nut 5, and second nuts 6 are respectively connected to the screw rods above and below the first nut 5 through threads; a rubber pad 7 is arranged in the U-shaped clamp 1).

The inner diameter of the first nut 5 is larger than the outer diameter of the first screw 4, and the first screw 4 can move up and down inside the first nut 5 (that is, the first screw 4 and the first nut 5 are not mated).

The two rubber cushions 7 are respectively positioned on the upper end surface and the lower end surface inside the U-shaped clamp 1.

The displacement piece 8 can be removed along spliced pole 2, is provided with bolt 11 in displacement piece 8 bottom, and displacement piece 8 through bolt 11 with spliced pole 2 top tightly together (that is to say dig in displacement piece 8 bottom and be equipped with the through-hole that has the internal screw thread, there is assorted bolt 11 through threaded connection in this through-hole, when the tight spliced pole 2 in top of bolt 11, displacement piece 8 is together fixed with spliced pole 2).

A through hole is dug in the upper part of the displacement block 8, a second screw 9 is inserted into the through hole, and matched nuts are respectively arranged on the second screw 9 on the two sides of the displacement block 8 (that is, the through hole is dug in the upper part of the displacement block 8, the second screw 9 is inserted into the through hole and is in non-threaded connection, and the matched nuts are respectively screwed on the second screw 9 on the two sides of the displacement block 8, so that the second screw 9 is fixed through the nuts).

Anchor clamps 10 are the clamp, and the lower extreme of percentage table 3 is inserted and is established in the clamp to fix through bolt and nut (that is to say anchor clamps 10 are the clamp form, can know in fig. 2 that anchor clamps are the ring form and distribute, and it has the mouth to open at the right-hand member of ring, and sets up the connecting plate at the opening part, has beaten the through-hole respectively on every connecting plate, and two connecting plates are fixed through bolt and nut).

In the above description, the U-shaped clamp is an iron bar, and the two first nuts 5 located at the left end of the U-shaped clamp correspond to each other up and down.

The working principle is as follows:

the device is respectively arranged at the top of the last-stage blade of the rotor (a blade with the angle of 0 degree right above) and the root of the last-stage blade of the rotor (a blade with the angle of 0 degree right above), a U-shaped clamp is inserted at the position corresponding to the blade, and the blade is clamped through a second nut 6, namely the U-shaped clamp and the blade are fixed together;

adjusting the reading of the long pointer of the dial indicator to be zero, and recording the reading of the dial indicator as a;

starting the top shaft oil system, turning the rotor to rotate the dial indicator to a 90-degree position, stopping the top shaft oil system, and recording the reading b of the dial indicator;

starting the top shaft oil system, turning the rotor to rotate the dial indicator to a 180-degree position, stopping the top shaft oil system, and recording the reading c of the dial indicator;

starting the top shaft oil system, turning the rotor to rotate the dial indicator to a 270-degree position, stopping the top shaft oil system, and recording the reading d of the dial indicator;

sixthly, the method comprises the following steps: starting the top shaft oil system, rotating the rotor to enable the dial indicator to rotate to a position of 360 degrees (0 degrees), stopping the top shaft oil system, and recording the reading e of the dial indicator;

according to the above data verification and calculation method (single dial indicator):

eventually e = a should be obtained; a + c ≈ b + d (error no more than 0.1 mm)

Assuming the design requires that the cylinder be v higher than the rotor center, then: v = (c-a)/2; the left-right deviation is typically zero, i.e. b = d; the up-down adjustment calculation formula is as follows: v = (c-a)/2.

The utility model is arranged at the top and the root of the final stage blade of the rotor adjusting end and the electric end, the rotor is driven, the numerical values of 4 dial indicators are recorded at four positions, namely the upper position, the lower position, the left position and the right position, the local adjustment is carried out through calculation, and finally the state of the design requirement is reached; the utility model discloses work in can be faster more accurate completion look for, the material of preparation this instrument is common, but reuse, and easy operation can save and look for used manpower, has fine social practical value, easily promotes.

Claims

1. The utility model provides a turbine low pressure inner casing and rotor instrument of finding well, includes U type clamp (1) and percentage table (3), its characterized in that: a connecting column (2) is arranged at the right end of the U-shaped clamp (1), a displacement block (8) is sleeved on the connecting column, and the displacement block (8) is fixedly connected with the connecting column (2) through a bolt (11); a second screw (9) is inserted into the upper part of the displacement block (8) and is fixed through a nut; the right end of the second screw rod (9) is connected with a dial indicator (3) through a clamp (10); the left end of the U-shaped clamp (1) is provided with two first nuts (5), and the number of the first nuts (5) is two; a first screw (4) is inserted into the first nut (5), and second nuts (6) are respectively connected to the screws above and below the first nut (5) through threads; a rubber pad (7) is arranged in the U-shaped clamp (1).

2. The turbine low pressure inner cylinder and rotor centering tool of claim 1, wherein: the inner diameter of the first nut (5) is larger than the outer diameter of the first screw (4), and the first screw (4) can move up and down in the first nut (5).

3. The turbine low pressure inner cylinder and rotor centering tool of claim 1, wherein: the two rubber pads (7) are respectively positioned on the upper end face and the lower end face inside the U-shaped clamp (1).

4. The turbine low pressure inner cylinder and rotor centering tool of claim 1, wherein: the displacement block (8) can move along the connecting column (2), a bolt (11) is arranged at the bottom of the displacement block (8), and the displacement block (8) is tightly propped against the connecting column (2) through the bolt (11).

5. The turbine low pressure inner cylinder and rotor centering tool of claim 1, wherein: the upper portion of displacement piece (8) is dug and is equipped with the through-hole, and the through-hole interpolation is equipped with second screw rod (9) be provided with the assorted nut on the second screw rod of displacement piece (8) both sides respectively.

6. The turbine low pressure inner cylinder and rotor centering tool of claim 1, wherein: the fixture (10) is a hoop, and the lower end of the dial indicator (3) is inserted into the hoop and fixed through bolts and nuts.