阅读说明：本技术 一种适用于核电厂主泵电机的动平衡配重角度定位装置 (Dynamic balance weight angle positioning device suitable for main pump motor of nuclear power plant ) 是由 朱军 荀蔚 刘文超 卢仲轩 秦贯洲 周正平 管玉峰 魏建军 胡巍 鲍勇 李震洪 于 2020-12-31 设计创作，主要内容包括：本发明属于核电站检测维修技术,具体涉及一种适用于核电厂主泵电机的动平衡配重角度定位装置,包括安装在电机下部转轴外的定位仪内环、安装在定位仪内环外的定位仪外环、以及安装在定位仪外环上且位于外沿的激光射线仪。实现了配重角度位置的精确快速定位,排除了现场标定加重角度时目视估算带来的误差,使得加重角度与理论计算结果保持一致,最大程度保证动平衡调整的实施效果,动平衡调整一次成功；另外能够避免实际加重位置的误差累积,保持后续主泵电机动平衡影响系数的计算正确性,使其能正确表征主泵电机的振动特性。(The invention belongs to the nuclear power plant detection and maintenance technology, and particularly relates to a dynamic balance weight angle positioning device suitable for a main pump motor of a nuclear power plant. The accurate and rapid positioning of the angle position of the counterweight is realized, and errors caused by visual estimation when the weighting angle is calibrated on site are eliminated, so that the weighting angle is kept consistent with a theoretical calculation result, the implementation effect of dynamic balance adjustment is ensured to the maximum extent, and the dynamic balance adjustment is successful once; in addition, the error accumulation of the actual weighting position can be avoided, the calculation correctness of the motor balance influence coefficient of the subsequent main pump motor is kept, and the vibration characteristic of the main pump motor can be correctly represented.)

1. The utility model provides a dynamic balance counter weight angle positioning device suitable for nuclear power plant's main pump motor which characterized in that: the device comprises a position finder inner ring (2) arranged outside a rotating shaft (1) at the lower part of a motor, a position finder outer ring (3) arranged outside the position finder inner ring (2), and a laser ray instrument (8) arranged on the position finder outer ring (3) and positioned on the outer edge;

the inner ring (2) of the locator is marked with an adjusting scale;

the inner ring (2) of the positioning instrument is attached to the side surface of the lower rotating shaft (1) of the motor;

the locator inner ring (2) and the locator outer ring (3) can keep moving relatively in the respective circumferential directions.

2. The dynamic balance weight angular positioning device suitable for the main pump motor of the nuclear power plant as claimed in claim 1, wherein: and a level gauge (6) is arranged on the locator outer ring (3).

3. The dynamic balance weight angular positioning device suitable for the main pump motor of the nuclear power plant as claimed in claim 1, wherein: the locator inner ring (2) is composed of two identical half rings, the two half rings wrap the lower rotating shaft (1) of the motor, and the two half rings are fixed.

4. The dynamic balance weight angular positioning device suitable for the main pump motor of the nuclear power plant as claimed in claim 3, wherein: the locator outer ring (3) is composed of two identical half rings, the two half rings wrap the locator inner ring (2), and the two half rings are fixed.

5. The dynamic balance weight angular positioning device suitable for the main pump motor of the nuclear power plant as claimed in claim 4, wherein: a concentric circular guide rail (9) is arranged on the outer side of the locator inner ring (2), and an outer ring inner roller (7) is arranged on the locator outer ring (3); the circular guide rail (9) is provided with an outer ring inner roller (7), and the outer ring inner roller (7) slides along the circular guide rail (9).

6. The dynamic balance weight angular positioning device suitable for the main pump motor of the nuclear power plant as claimed in claim 4, wherein: and two parts of the locator outer ring (3) are fixed by using an outer ring locking bolt (5).

7. The dynamic balance weight angular positioning device suitable for the main pump motor of the nuclear power plant as claimed in claim 4, wherein: and two parts of the inner ring (2) of the positioning instrument are fixed by using an inner ring locking bolt (4).

8. The dynamic balance weight angular positioning device suitable for the main pump motor of the nuclear power plant as claimed in claim 4, wherein: the level meter (6) is placed on the outer ring (3) of the positioning instrument to horizontally correct the level meter, and the laser ray instrument (8) is set to be in a vertical mode.

Technical Field

The invention belongs to the technology of nuclear power plant detection and maintenance, and particularly relates to a dynamic balance weight angle positioning device applicable to a main pump motor of a nuclear power plant.

Background

A primary circuit main coolant pump of a nuclear power plant is a vertical double-speed three-phase asynchronous squirrel-cage motor, and the motor is connected with a main pump body through a torsion bar coupler. Before and after the unit is overhauled for a long time, the vibration state of the motor can generate certain change, and the situation of high vibration occurs. Therefore, after each overhaul is finished, dynamic balance adjustment needs to be carried out according to the vibration condition of the main pump motor.

During the implementation of dynamic balance of a main pump motor, the motor flywheel has a large diameter and the motor rotating shaft has a small diameter, so that the distance between the motor flywheel and the motor rotating shaft is long, and the size difference is large, so that an effective positioning means is lacked during actual operation, the installation angle of a balancing weight on the flywheel is difficult to accurately position according to a zero point mark on the motor rotating shaft, and the implementation effect of the dynamic balance of the main pump motor is influenced.

The main effects are as follows:

1) the actual angle of the weighting is difficult to position, the weighting angle is calibrated on site only by visual estimation at present, certain deviation exists between the actual angle and a theoretical calculation result, and the dynamic balance adjustment effect is influenced;

2) the actual weighting position has deviation from the theoretical calculation position, which influences the calculation of the dynamic balance influence coefficient of the main pump motor, and long-term error accumulation causes that the calculated influence coefficient cannot correctly represent the vibration characteristic of the main pump motor;

3) because the visual error is great, can lead to once adjusting unsuccessfully, influence the maintenance progress, increase extra economic cost, simultaneously, adjustment many times also increases personnel's stay time at the maintenance scene, increases unnecessary radiation risk.

Disclosure of Invention

The invention aims to provide a dynamic balance weight angle positioning device suitable for a main pump motor of a nuclear power plant, which can realize accurate positioning of a dynamic balance weight angle.

The technical scheme of the invention is as follows:

a dynamic balance weight angle positioning device suitable for a main pump motor of a nuclear power plant comprises an inner ring of a positioning instrument, an outer ring of the positioning instrument and a laser ray instrument, wherein the inner ring of the positioning instrument is arranged outside a rotating shaft at the lower part of the motor;

the inner ring of the locator is marked with an adjusting scale;

the inner ring of the locator is attached to the side surface of a rotating shaft at the lower part of the motor;

the locator inner ring and the locator outer ring can keep moving relatively in the respective circumferential directions.

And a level meter is arranged on the outer ring of the positioning instrument.

The locator inner ring is composed of two identical half rings, the two half rings wrap a rotating shaft at the lower part of the motor, and the two half rings are fixed.

The locator outer ring comprises two identical half rings, the two half rings wrap the locator inner ring, and the two half rings are fixed.

A concentric circular guide rail is arranged on the outer side of the inner ring of the position finder, and an outer ring inner roller is arranged on the outer ring of the position finder; and the circular guide rail is provided with an outer ring inner roller, and the outer ring inner roller slides along the circular guide rail.

And fixing the two parts of the outer ring of the positioning instrument by using the outer ring locking bolt.

And fixing the two parts of the inner ring of the positioning instrument by using the inner ring locking bolt.

After the level meter is placed on the outer ring of the position meter to horizontally correct the level meter, the laser ray meter is set to be in a vertical mode.

The invention has the following remarkable effects: the accurate and rapid positioning of the angle position of the counterweight is realized, and errors caused by visual estimation when the weighting angle is calibrated on site are eliminated, so that the weighting angle is kept consistent with a theoretical calculation result, the implementation effect of dynamic balance adjustment is ensured to the maximum extent, and the dynamic balance adjustment is successful once; in addition, the error accumulation of the actual weighting position can be avoided, the calculation correctness of the motor balance influence coefficient of the subsequent main pump motor is kept, and the vibration characteristic of the main pump motor can be correctly represented.

The device is integrally designed by adopting an inner ring and an outer ring, a dial is carved on the inner ring and is arranged on a rotating shaft at the lower part of the motor, and a laser locator is arranged on the outer ring. After the installation is finished, the laser instrument (capable of projecting 360 degrees) is turned on, and the outer ring is rotated to perform angle positioning. The whole set of positioning device has easy operability, and the deviation of the angular positioning precision of the positioning device needs to meet the requirement of not more than +/-5 degrees.

Meanwhile, in order to avoid damages such as scraping and grinding to the motor rotating shaft body, a layer of protective washer (made of rubber or other materials) needs to be additionally arranged inside the positioning device to protect the motor rotating shaft.

(1) The device has the advantages of detachability, simple structure, simple assembling, disassembling and using methods, small volume and strong portability;

(2) a micro level meter is arranged, so that the levelness can be conveniently adjusted;

(3) the inner ring and the outer ring are arranged and connected through the guide rail roller, and the laser ray instrument arranged on the outer ring is matched, so that 360-degree dead-angle-free positioning in the whole space can be realized;

(4) the dial is arranged at the inner ring, the pointer is arranged on the outer ring, the rotating angle can be read in real time when the outer ring is rotated, and the positioning is accurate and quick;

(5) the inner ring is embedded with a rubber ring, so that the friction force and the tightness are increased under the condition of not damaging the shaft;

(6) the laser instrument is provided with a control button, so that the ray mode can be adjusted, and the switching of the horizontal plane/vertical plane positioning mode is realized;

(7) the laser instrument has the advantages of detachability, replaceability and convenient maintenance.

Drawings

FIG. 1 is a schematic view of an installation of a dynamic balance weight angular positioning apparatus suitable for a nuclear power plant main pump motor;

FIG. 2 is a top cross-sectional view of a dynamic balance weight angular positioning apparatus suitable for use with a nuclear power plant main pump motor;

FIG. 3 is a side view of a dynamic balance weight angular positioning apparatus suitable for use with a nuclear power plant main pump motor;

in the figure: 1. a lower rotating shaft of the motor; 2. an inner ring of a positioning instrument; 3. an outer ring of a locator; 4. an inner ring locking bolt; 5. an outer ring locking bolt; 6. a level gauge; 7. an outer ring inner roller; 8. a laser beam instrument; 9. a circular track.

Detailed Description

The invention is further illustrated by the accompanying drawings and the detailed description.

As shown in fig. 1, 2 and 3, the dynamic balance weight angle positioning apparatus includes:

the laser positioning device comprises a positioning device inner ring 2 arranged outside a rotating shaft 1 at the lower part of the motor, a positioning device outer ring 3 arranged outside the positioning device inner ring 2, a level meter 6 arranged on the positioning device outer ring 3, and a laser ray instrument 8 arranged on the positioning device outer ring 3 and positioned on the outer edge.

The inner ring 2 of the locator is composed of two identical half rings, the two half rings wrap a rotating shaft 1 at the lower part of the motor and are fixed through an inner ring locking bolt 4;

similarly, the locator outer ring 3 is composed of two identical half rings, the two half rings wrap the locator inner ring 2 and are fixed through an outer ring locking bolt 5;

as shown in fig. 2, a concentric circular guide rail 9 is installed outside the locator inner ring 2, an outer ring inner roller 7 is installed on the guide rail, and the outer ring inner roller 7 is fixedly installed inside the locator outer ring 3 and is uniformly distributed along the circumferential direction. The locator inner ring 2 and the locator outer ring 3 are kept moving relatively in the respective circumferential directions by the relative movement of the outer ring inner roller 7 and the circular guide rail 9.

When the positioning instrument is installed, firstly, the positioning instrument inner ring 2 is clasped on the lower rotating shaft 1 of the motor, and the positioning instrument inner ring 2 is attached to the lower rotating shaft 1 of the motor by fastening the inner ring locking bolt 4 with a wrench;

then, an outer ring 3 of the position finder is installed, and attention is paid to the fact that an inner roller 7 of the outer ring needs to be embedded into a guide rail of the inner ring 2 of the position finder;

then an outer ring locking bolt 5 is installed, and a spanner is used for fastening the locator outer ring 3;

rotating the locator outer ring 3, if the locator outer ring can rotate smoothly and has no resistance, indicating that the locator inner ring 2 and the locator outer ring 3 are installed and matched in place;

mounting a laser ray instrument 8 on the outer ring 3 of the locator;

the level gauge 6 is placed on the outer ring 3 of the position gauge, and the levelness of the position gauge which is installed is finely adjusted according to the indication until the bubbles in the level gauge 6 move to the middle of the peeping window.

When the angle positioning is carried out in the trial period,

a. confirming that the positioning instrument is completely installed and the levelness is corrected;

b. turning on the laser ray instrument 8, and setting the positioning mode to be a vertical mode;

c. according to the angle required by the dynamic balance weight, the index of a dial is marked on the inner ring 2 of the locator, and the outer ring 3 of the locator is rotated to the required angle at a constant speed;

e. after the outer ring 3 of the locator is selected in place, the position indicated by the laser ray instrument 8 at the moment is marked, and angle positioning is finished.

When the positioning instrument is disassembled, the laser ray instrument 8 is closed firstly, then the laser ray instrument is disassembled, the outer ring locking bolt 5 is disassembled, and the outer ring 3 of the positioning instrument is disassembled; and (4) removing the inner ring locking bolt 4 and removing the locator inner ring 2.