CN218781716U

CN218781716U - Device for measuring concentricity of charging pump rotor on nuclear power station

Info

Publication number: CN218781716U
Application number: CN202222832191.0U
Authority: CN
Inventors: 高希君; 邵晓峰; 孙建鑫; 李永杰; 祁彦鹤
Original assignee: China Power Hua Yuan Nuclear Power Engineering & Technology Co ltd
Current assignee: China Power Hua Yuan Nuclear Power Engineering & Technology Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-03-31
Anticipated expiration: 2032-10-26

Abstract

The utility model relates to a fill pump rotor concentricity measuring device on nuclear power station, including axle staple bolt and floating module, the axle staple bolt is used for fixing at last pump shaft of filling the pump, be equipped with the slider support barrel on the axle staple bolt, the last lever percentage table mounting hole that is equipped with of floating module for install the lever percentage table. When the device is used, the lever dial indicator is installed on the floating module, the floating module is fixed in the floating block supporting barrel, the shaft hoop is used for being fixed on a pump shaft of an upper charging pump, and the lever dial indicator is used for measuring the concentricity of an upper charging pump rotor and an upper charging pump body. Compared with the prior art, the utility model has stable structure, convenient and fast operation and convenient installation in narrow space; the stability is high, and the data measurement is accurate; the mechanical property is excellent, and the corrosion resistance and the rust prevention function are better.

Description

Device for measuring concentricity of rotor of charging pump in nuclear power station

Technical Field

The utility model relates to a maintenance tool for nuclear power plant pump especially relates to a fill pump rotor concentricity measuring device on being used for nuclear power plant.

Background

When the nuclear power station unit is overhauled, the upper charging pump can be disassembled to check, internal wearing parts can be replaced, and relevant data can be checked and adjusted, and the upper charging pump is a multistage horizontal type core-pulling centrifugal pump.

One of the key processes is to adjust the concentricity of the rotor and the pump body, and the maximum value and the minimum value of measuring instruments at the free end and the driving end of the pump body are not allowed to exceed 0.05mm when the rotor is turned. If the tolerance is exceeded, the position of the bearing chamber needs to be adjusted to ensure that the concentricity of the rotor in the pump body is within the standard range.

The pump is compact in design structure, the operation space of the drive end and the free end of the pump is small, and special tools are difficult to install and debug in the limited space.

The existing special tool is extremely difficult to install, the reliability of the special tool is extremely low, the reading system error of the dial indicator is large, and meanwhile, the radiation dose of personnel is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a device for filling pump rotor concentricity measurement on nuclear power station in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

the technical scheme of the utility model is to provide a device for measuring the concentricity of a charging pump rotor on a nuclear power station, which comprises a shaft hoop and a floating module;

the shaft hoop is used for being fixed on a pump shaft of the charging pump;

the shaft hoop is provided with a floating block supporting barrel, and the floating module is provided with a lever dial indicator mounting hole for mounting a lever dial indicator;

when the device is used, the lever dial indicator is installed on the floating module, the floating module is fixed in the floating block supporting barrel, the shaft hoop is used for being fixed on a pump shaft of an upper charging pump, and the lever dial indicator is used for measuring the concentricity of an upper charging pump rotor and an upper charging pump body.

Further, the axle staple bolt is two relative semicircle rings that set up, including first semicircle ring and second semicircle ring.

Furthermore, the two ends of the diameter of the first semicircular ring and the second semicircular ring are respectively provided with a hoop locking support.

Furthermore, the hoop locking support is also provided with a hoop locking screw mounting hole.

Furthermore, on the hoop locking support at the same side, two hoop locking screw mounting holes are correspondingly arranged for the same bolt to pass through. When the shaft hoop is fixed on the pump shaft, a first outer hexagon bolt is screwed into the hoop locking screw mounting hole and is used for tightly hooping the shaft hoop on the pump shaft.

Further, the slider support bucket is arranged in the middle of the first semicircular ring.

Furthermore, a floating block screw hole is formed in the side wall of the floating block supporting barrel. And when the second outer hexagon bolt penetrates through the floating block top thread hole, the floating module is fixed in the floating block supporting barrel.

Furthermore, when the floating module is fixed in the floating block supporting barrel, the circle center of the hoop locking screw mounting hole and the circle center of the shaft hoop are on the same straight line.

Further, a lever dial indicator top thread hole is formed in the top of the floating module. When the third outer hexagonal bolt penetrates through the top thread hole of the lever dial indicator, the lever dial indicator is fixed in the floating module.

Further, the ratio of the height of the floating module to the height of the slider support bucket is 1.4-2.

Furthermore, the axle hoop is a stainless steel axle hoop, and the floating module is a stainless steel floating module.

Further, the shaft hoop is a 304 stainless steel shaft hoop, and the floating module is a 304 stainless steel floating module.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) The utility model discloses many places fastening point adopts outer hexagon bolt design, and the structure is firm, and convenient operation is swift, cooperates tools such as box spanner, extension bar simultaneously, just can install in narrow and small space.

(2) The utility model discloses a firm lever percentage table of jackscrew structure, stability is high, is 0 almost through lever percentage table reading error, and data measurement is accurate.

(3) The utility model discloses choose for use 304 stainless steel axle staple bolt and 304 stainless steel module that floats, mechanical properties is good, uses for a long time and can not produce the rust stain, can not produce the foreign matter, satisfies the clean requirement of nuclear power station kernel simultaneously.

(4) The utility model discloses regulatory function about having can satisfy the barrel of multiple size and measure.

(5) The utility model discloses a diameter of axle staple bolt and pump shaft is unanimous, is difficult for damaging the pump shaft outward appearance.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

The labels in the figure are as follows:

1-a floating module; 2-a lever dial indicator mounting hole; 3-a slider support tub; 4-shaft hoop; 5, locking and supporting the hoop; 6-a slider jackscrew hole; 7-mounting holes for locking screws of the hoop; 8-top thread hole of the lever dial indicator.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

In the following embodiments, unless otherwise specified, functional components or structures are all conventional components or structures adopted in the art to achieve the corresponding functions.

Example 1

As shown in fig. 1, the present embodiment provides an apparatus for measuring concentricity of a rotor of a charge pump in a nuclear power station, including a shaft hoop 4 and a floating module 1, where the shaft hoop 4 is used to be fixed on a pump shaft of the charge pump; a floating block supporting barrel 3 is arranged on the shaft hoop 4, and a lever dial indicator mounting hole 2 is arranged on the floating module 1 and used for mounting a lever dial indicator; when the device is used, the lever dial indicator is installed on the floating module 1, the floating module 1 is fixed in the floating block supporting barrel 3, the shaft hoop 4 is used for being fixed on a pump shaft of an upper charging pump, and the lever dial indicator is used for measuring the concentricity of an upper charging pump rotor and an upper charging pump body. The shaft hoop 4 is a 304 stainless steel shaft hoop, and the floating module 1 is a 304 stainless steel floating module.

The axle staple bolt 4 is two relative semicircle rings that set up, including first semicircle ring and second semicircle ring. The diameter both ends of first semicircle ring and second semicircle ring are equipped with staple bolt locking support 5 respectively, and staple bolt locking screw mounting hole 7 has still been seted up on staple bolt locking support 5. On the staple bolt locking support 5 of homonymy, two staple bolt locking screw mounting holes 7 correspond the setting, supply same bolt to pass. When the shaft hoop 4 is fixed on the pump shaft, the first outer hexagon bolt is screwed into the two corresponding hoop locking screw mounting holes 7, and the shaft hoop 4 is tightly hooped on the pump shaft.

The slider supports the centre that bucket 3 located first semicircle ring, has seted up slider jackscrew hole 6 on the lateral wall of slider support bucket 3. When the second outer hexagon bolt penetrates through the floating block top thread hole 6, the floating module 1 is fixed in the floating block supporting barrel 3. When the floating module 1 is fixed in the floating block supporting barrel 3, the circle center of the hoop locking screw mounting hole 7 and the circle center of the shaft hoop 4 are on the same straight line.

The top of the floating module 1 is provided with a lever dial indicator top screw hole 8, and when a third outer hexagonal bolt penetrates through the lever dial indicator top screw hole 8, the lever dial indicator is fixed in the floating module 1. The height ratio of the floating module 1 to the slider support barrel 3 is about 1.6.

When the device is used, the operation steps are as follows:

step (1), a blocking cap of the lever dial indicator is installed in a lever dial indicator installation hole 2 of the floating module 1, a socket wrench is used for fastening a third outer hexagon bolt in a top thread hole 8 of the lever dial indicator, the torque is moderate, the lever dial indicator is checked, and the shaking condition is avoided.

And (2) inserting the floating module 1 into the floating block supporting barrel 3, and slightly screwing the second outer hexagon bolt in the floating block top screw hole 6 on the side surface to prevent the floating module from falling.

And (3) respectively embracing the first semicircular ring and the second semicircular ring of the shaft hoop 4 on the pump shaft, and adjusting the axial positions of the first semicircular ring and the second semicircular ring on the pump shaft to enable the measuring head of the lever dial indicator to point on the smooth finish machining surface of the inner wall of the upper charge pump body. And a socket wrench is used for fastening the first outer hexagon bolt in the hoop locking screw mounting hole 7, so that the torque is moderate.

And (4) adjusting the position of the floating module 1 to enable a measuring head of the lever dial indicator to be pressed on a smooth finish machining surface of the inner wall of the upper charging pump body, displaying a certain numerical value, and locking a second outer hexagon bolt in a floating block jackscrew hole 6.

And (5) coiling the rotor, checking the reading of the lever dial indicator, recording data of the upper surface, the lower surface, the left surface and the right surface of the inner wall of the upper charging pump body pointed by a measuring head of the lever dial indicator, and adjusting the position of the bearing chamber according to the concentricity deviation of the upper surface and the lower surface and the concentricity deviation of the left surface and the right surface so that the concentricity of the rotor and the upper charging pump body meets the standard requirement (the concentricity deviation is less than or equal to 0.05 mm).

Through the operation method, the drive end and the free end of the upper charging pump body are respectively provided with one set of the device, the concentricity of the rotor and the upper charging pump body is adjusted, and the concentricity deviation of two sides meets the standard requirement.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. A device for measuring the concentricity of a rotor of a charge pump on a nuclear power station is characterized by comprising a shaft hoop (4) and a floating module (1);

the shaft hoop (4) is used for being fixed on a pump shaft of the charging pump;

a floating block supporting barrel (3) is arranged on the shaft hoop (4), and a lever dial indicator mounting hole (2) is formed in the floating module (1) and used for mounting a lever dial indicator;

when the device is used, the lever dial indicator is installed on the floating module (1), the floating module (1) is fixed in the floating block supporting barrel (3), the shaft hoop (4) is used for being fixed on a pump shaft of an upper charging pump, and the lever dial indicator is used for measuring the concentricity of an upper charging pump rotor and an upper charging pump body.

2. The device for measuring the concentricity of the rotor of the charge pump on the nuclear power plant as recited in claim 1, wherein the shaft hoop (4) is two semicircular rings which are oppositely arranged, and comprises a first semicircular ring and a second semicircular ring.

3. The device for measuring the concentricity of the rotor of the charge pump on the nuclear power station as recited in claim 2, wherein the two ends of the diameter of the first semicircular ring and the second semicircular ring are respectively provided with a hoop locking support (5).

4. The device for measuring the concentricity of the rotor of the charge pump on the nuclear power station as claimed in claim 3, wherein the hoop locking support (5) is provided with a hoop locking screw mounting hole (7).

5. The device for measuring the concentricity of the charging pump rotor on the nuclear power station as recited in claim 4, wherein two hoop locking screw mounting holes (7) are correspondingly arranged on the hoop locking support (5) at the same side, and a same bolt can pass through the two hoop locking screw mounting holes.

6. A device for measuring the concentricity of a rotor of a charge pump on a nuclear power plant as claimed in claim 3, wherein the slider support bucket (3) is arranged in the middle of the first semi-circular ring.

7. The device for measuring the concentricity of the rotor of the charge pump of the nuclear power station as recited in claim 3, wherein a slider jack screw hole (6) is formed in the side wall of the slider support barrel (3).

8. The device for measuring the concentricity of the rotor of the charge pump on the nuclear power plant as recited in claim 1, characterized in that the top of the floating module (1) is provided with a lever dial indicator jackscrew hole (8).

9. The device for measuring the concentricity of the rotor of the charge pump of the nuclear power plant as claimed in claim 8, wherein the ratio of the height of the floating module (1) to the height of the floating block supporting barrel (3) is 1.4-2.

10. The device for measuring the concentricity of the rotor of the charge pump on the nuclear power station as recited in claim 1, wherein the shaft hoop (4) is a stainless steel shaft hoop, and the floating module (1) is a stainless steel floating module.