CN114014142A - Tool for hoisting and overhauling planetary gear component in seawater circulating pump of nuclear power station - Google Patents

Abstract

The invention belongs to the technical field of nuclear-grade fluid machinery maintenance engineering of nuclear power stations, and particularly relates to a tool for hoisting and maintaining a planetary gear component in a seawater circulating pump of a nuclear power station.

Description

Tool for hoisting and overhauling planetary gear component in seawater circulating pump of nuclear power station

Technical Field

The application belongs to the technical field of nuclear power station nuclear-grade fluid machinery maintenance engineering, and particularly relates to a tool for hoisting and maintaining a planetary gear component in a seawater circulating pump of a nuclear power station.

Background

The seawater circulating pump of the nuclear power station realizes the functions of transmitting power, reducing rotating speed, increasing torque, bearing axial force and ensuring the steering of the water pump through the gear box. An NGW planetary gear speed reducer structure is adopted in the seawater circulating pump of the nuclear power station, and power three-split herringbone-tooth planet primary transmission is adopted.

Because the internal structure of the seawater circulating pump is complicated, the quality of a single part is large, the difficulty in disassembling and assembling the gear box is large during maintenance of the seawater circulating pump, the position of the part is supported and adjusted by manpower more, and equipment bruising and personnel injury accidents are easy to happen.

Disclosure of Invention

The utility model aims at providing an instrument that is arranged in hoist and mount of nuclear power station sea water circulating pump planetary gear part to overhaul, during the maintenance of nuclear power station sea water circulating pump, the gear box is dismantled and is implemented the degree of difficulty great with the equipment work, and more manpower of relying on supports and adjustment part position, the problem of equipment bruise and personnel injury accident easily takes place.

The technical scheme for realizing the purpose of the application is as follows:

the embodiment of the application provides an instrument that is arranged in hoist and mount of nuclear power station sea water circulating pump planetary gear spare to overhaul, the instrument includes: turning tool and hoisting tool;

the upper end face of the hoisting tool is fixed with the lower end face of the barring tool, and the lower end face of the hoisting tool is connected with the planetary gear box planetary pack upper flange through a bolt and used for hoisting the rotor component of the planetary gear box;

the turning tool and the hoisting tool are both of a hollow structure, so that a spline shaft of the planetary gear penetrates through the turning tool and is fixed on the upper end face of the turning tool;

the hoisting tool is provided with a lifting lug.

Optionally, the jigger tool includes: a barring bracket, a thrust bearing and a bearing plate;

the lower end of the barring bracket is fixed with the hoisting tool, and the upper end surface of the barring bracket is provided with an annular groove for mounting the thrust bearing;

the thrust bearing is arranged on the annular groove, and the lower end surface of the thrust bearing is in contact with the annular groove;

the bearing plate is installed on the upper end face of the thrust bearing and used for containing the spline shaft.

Alternatively to this, the first and second parts may,

the bearing plate is of a two-half structure.

Optionally, the carrier plate includes: a first semi-circular ring and a second semi-circular ring;

the first semicircular ring and the second semicircular ring are fixed through a bearing plate bolt.

Optionally, the hoisting tool comprises a hoisting disc:

the diameter of the hoisting disc is larger than that of the barring bracket;

and the upper end surface of the hoisting disc is provided with a bolt hole for connecting with the planetary gear box planetary bag upper flange through a bolt.

Alternatively to this, the first and second parts may,

the upper end surface of the hoisting disc is also provided with at least two lifting lugs; the two lifting lugs are symmetrically arranged.

Alternatively to this, the first and second parts may,

the lifting lug is 4 for cooperation chain block and cross hanging beam.

The beneficial technical effect of this application lies in:

(1) the tool for hoisting and overhauling the planetary gear component in the seawater circulating pump of the nuclear power station is simple in structure and convenient to operate; the hoisting tool is configured, so that the hoisting part can be leveled, the collision and strain of the part in the hoisting process can be avoided, the reliability of the dismounting and hoisting work of the seawater circulating pump part can be effectively guaranteed, the overhaul process of the gear box part can be effectively improved, the overhaul efficiency of equipment is improved, and the overall overhaul period of marine engineering equipment is shortened.

(2) The utility model provides a tool that is arranged in hoist and mount of planet wheel part to overhaul among nuclear power station seawater circulating pump disposes a barring frock, can carry out the barring inspection of planet package part and the adjustment of part position in the hoist and mount assembling process, reduces the reliance to the manpower during the assembly operation, reduces personnel's injured risk.

Drawings

Fig. 1 is a schematic structural diagram of a tool for hoisting and overhauling a planetary gear component in a seawater circulating pump of a nuclear power plant provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another tool for hoisting and overhauling a planetary gear component in a seawater circulating pump of a nuclear power plant provided in the embodiment of the present application;

fig. 3 is a schematic use state diagram of a tool for hoisting and overhauling a planetary gear component in a seawater circulating pump of a nuclear power plant provided by the embodiment of the application.

In the figure:

1-turning a tooling; 11-barring support, 111-ring groove; 12-a thrust bearing; 13-carrier plate, 131-first semi-circular ring, 132-second semi-circular ring, 133-carrier plate bolt;

2-hoisting the tool; 21-hoisting a disc; 22-a lifting lug;

3-a bolt;

4-a spline shaft;

5-planetary bag;

6-a gear box;

7-thrust collar.

Detailed Description

In order to make the technical solutions in the embodiments of the present application more comprehensible to those skilled in the art, the following description will be made in detail and completely with reference to the accompanying drawings in the embodiments of the present application. It should be apparent that the embodiments described below are only some of the embodiments of the present application, and not all of them. All other embodiments that can be derived by a person skilled in the art from the embodiments described herein without inventive step are within the scope of the present application.

The inventor of the application discovers in research that the main difficulties in the maintenance process of the seawater circulating pump of the nuclear power station have the following aspects according to the structural characteristics of the planetary gear transmission mechanism of the NGW planetary gear speed reducer:

1. in the process that only the combined bearing component is inspected, the planetary package and the thrust head still need to be disassembled;

2. in order to ensure the dynamic balance performance of the planet package and the thrust collar, the planet package and the thrust collar and the gearbox body are assembled and parts are reassembled according to positions before disassembly during reassembly, the structure of the planet package, the thrust collar and the gearbox body which are matched mutually is responsible, and the reassembly difficulty is very high only by using a travelling crane and a common lifting appliance;

3. the planet package is in spline fit with the gearbox body, and the planet package body has large mass and volume, so that the requirement on leveling in the hoisting process is high, otherwise, the tooth surface is easy to be damaged.

In order to solve the problems of matching and position adjustment of a gearbox planetary package with a gearbox shell and a thrust head during integral disassembly of the gearbox planetary package and integral hoisting and leveling of a gearbox rotor component (comprising the gearbox, the thrust head and a combined bearing component), the embodiment of the application provides a tool for hoisting and overhauling the planetary gear component in a seawater circulating pump of a nuclear power station, and a hoisting tool is configured to level the hoisting component; the barring frock is configured, can carry out the barring inspection of planet package part and the adjustment of hoist and mount part position in the assembling process, can effectively reduce the dependence to the manpower during the assembly operation, reduces personnel's injured risk, improves the maintenance technology of gearbox part, improves equipment maintenance efficiency, shortens marine worker's equipment maintenance overall period.

Based on the above, in order to clearly and specifically explain the above advantages of the present application, the following description of the embodiments of the present application will be made with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, the drawing is a schematic structural diagram of a tool for hoisting and overhauling a planetary gear component in a seawater circulating pump of a nuclear power plant according to an embodiment of the present application.

The utility model provides a tool that is arranged in hoist and mount of nuclear power station sea water circulating pump planetary gear spare to overhaul includes: the turning tool 1 and the hoisting tool 2;

the upper end face of the hoisting tool 2 is fixed with the lower end face of the barring tool 1, and the lower end face of the hoisting tool 2 is connected with the planetary gear box planetary pack upper flange through a bolt 3 and used for hoisting the rotor component of the planetary gear box;

the turning tool 1 and the hoisting tool 2 are both of a hollow structure, so that a spline shaft of the planetary gear penetrates through the hollow structure, and the spline shaft is fixed on the upper end face of the turning tool 1;

lifting lugs are arranged on the lifting tool 2.

In this application embodiment, hoist and mount frock 2 passes through 3 firm in connection backs with gear box planet package input flange, can carry out the leveling of rotor part through chain block, avoids the hoist and mount in-process, and the rotor part appears colliding with or bites with gear box casing spline relative movement in-process.

In addition, during the period of time when the planetary bag component needs to be lifted independently, the turning tool 1 and the lifting tool 2 need to be assembled with the spline shaft.

Firmly connecting the turning tool 1, the hoisting tool 2 and the input flange of the planetary gear box package, and enabling the spline shaft to penetrate into the inner ring of the sun gear of the planetary gear package. And hoisting and leveling the planet package component through the cross-shaped hoisting beam and the chain block.

In some possible implementation manners of the embodiment of the application, the spline shaft has large mass, so that the spline shaft is difficult to lift alone by manpower and the whole planet bag is coiled by the spline shaft; meanwhile, when the planet package component and the thrust shaft are assembled, the planet package component and the thrust shaft need to be arranged back in situ to ensure that the dynamic balance performance of the planet package component is not influenced, so that after the planet package falls into a spline groove of a gear box shell, the planet package turning tool needs to be driven, the planet gear component is rotated through transmission of the spline shaft, and alignment of the planet gear component and a positioning pin hole of a lower thrust head is ensured. Then, the turning tool 1 may specifically include: a turning bracket 11, a thrust bearing 12 and a bearing plate 13;

the lower end of the turning bracket 11 is fixed with the hoisting tool 2, and the upper end surface of the turning bracket 11 is provided with an annular groove 111 for mounting a thrust bearing;

the thrust bearing 12 is installed on the annular groove 111, and the lower end surface of the thrust bearing is in contact with the annular groove 111;

the carrier plate 13 is mounted on the upper end surface of the thrust bearing 12 for holding the spline shaft.

In one example, as shown in FIG. 2, the carrier plate 12 is a two-piece construction.

As an example, the carrier plate 12, comprises: a first semicircular ring 131 and a second semicircular ring 132;

the first half ring 131 and the second half ring 132 are fixed by a carrier plate bolt 133.

In some possible implementation manners of the embodiment of the application, the hoisting tool 2 includes: hoisting disc 21:

the diameter of the hoisting disc 21 is larger than that of the barring bracket 11;

the upper end face of the hoisting disc 21 is provided with a bolt hole for connecting with an upper flange of a planetary gear box planetary bag through a bolt 3.

In some possible implementations of the embodiment of the present application, the upper end surface of the hoisting disk 21 is further provided with at least two lifting lugs 22; the two lifting lugs 22 are symmetrically arranged.

As an example, the lifting lugs 22 are 4 for engaging a chain block and a cross beam.

It can be understood that the hoisting disc 2 is connected with the upper flange of the gear box planet package through the bolts 3, 4 lifting lugs are attached, and the hoisting disc can be matched with the chain block and the cross hanging beam to hoist the rotor part of the gear box.

The following describes a specific use method of the tool for hoisting and overhauling the planetary gear component in the seawater circulating pump of the nuclear power plant provided by the embodiment of the application in detail with reference to a specific example.

Referring to fig. 3, the drawing is a schematic use state diagram of a tool for hoisting and overhauling a planetary gear component in a seawater circulating pump of a nuclear power plant according to an embodiment of the present application.

The spline shaft 4 is held on a carrier plate 13, via a thrust bearing 12, on a barring bracket 11 during a barring operation. When the planet package 5 is turned, the turning support 11 and the hoisting tool 2 are connected with the upper flange surface of the planet package through the bolt 3 and the gasket. After the spline shaft 4 is lifted, the first half ring 131 and the second half ring 132 are attached from both sides of the spline shaft 4 and fixed by the carrier plate bolts 133.

As shown in fig. 3, after the turning tool 1 and the hoisting tool 2 are installed, the lower end teeth of the spline shaft 4 are meshed with the inner teeth of the sun gear of the planetary bag 5. The spline shaft 4 is rotated, so that the planet packet 5 can be flexibly turned to detect the defects of damage, corrosion and the like of the surface of the planet gear;

in the process of the gear box 6 being installed back, the planet package 5 is leveled by using the tool for hoisting and overhauling the planet gear component in the seawater circulating pump of the nuclear power station, and then the planet package 5 falls into the spline groove of the box body of the gear box 6. At this time, the bottom of the planetary bag 5 still has a certain gap from the lower thrust collar 7. The planetary bag 5 is rotated by rotating the spline shaft 4. And stopping turning when the planetary package 5 rotates to the thrust head 7 and returns to the state of the position before disassembly. The planet bag 5 is continuously dropped through the travelling crane and then dropped onto the thrust collar 7.

The present application has been described in detail with reference to the drawings and examples, but the present application is not limited to the above examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. The prior art can be used for all the matters not described in detail in this application.

Claims (7)

1. The utility model provides an instrument that is arranged in hoist and mount of nuclear power station sea water circulating pump planetary gear spare to overhaul, a serial communication port, the instrument includes: turning tool and hoisting tool;

the upper end face of the hoisting tool is fixed with the lower end face of the barring tool, and the lower end face of the hoisting tool is connected with the planetary gear box planetary pack upper flange through a bolt and used for hoisting the rotor component of the planetary gear box;

the turning tool and the hoisting tool are both of a hollow structure, so that a spline shaft of the planetary gear penetrates through the turning tool and is fixed on the upper end face of the turning tool;

the hoisting tool is provided with a lifting lug.

2. The tool for hoisting and overhauling planetary gear components in the seawater circulating pump in the nuclear power plant as claimed in claim 1, wherein the jigger tool comprises: a barring bracket, a thrust bearing and a bearing plate;

the lower end of the barring bracket is fixed with the hoisting tool, and the upper end surface of the barring bracket is provided with an annular groove for mounting the thrust bearing;

the thrust bearing is arranged on the annular groove, and the lower end surface of the thrust bearing is in contact with the annular groove;

the bearing plate is installed on the upper end face of the thrust bearing and used for containing the spline shaft.

3. The tool for hoisting and overhauling the planetary gear component in the seawater circulating pump of the nuclear power plant as recited in claim 2,

the bearing plate is of a two-half structure.

4. The tool for hoisting and overhauling the planetary gear part in the seawater circulating pump in the nuclear power plant as claimed in claim 3, wherein the carrier plate comprises: a first semi-circular ring and a second semi-circular ring;

the first semicircular ring and the second semicircular ring are fixed through a bearing plate bolt.

5. The tool for hoisting and overhauling the planetary gear component in the seawater circulating pump of the nuclear power plant as claimed in claim 2, wherein the hoisting tool comprises a hoisting disc:

the diameter of the hoisting disc is larger than that of the barring bracket;

and the upper end surface of the hoisting disc is provided with a bolt hole for connecting with the planetary gear box planetary bag upper flange through a bolt.

6. The tool for hoisting and overhauling the planetary gear component in the seawater circulating pump of the nuclear power plant as recited in claim 5,

the upper end surface of the hoisting disc is also provided with at least two lifting lugs; the two lifting lugs are symmetrically arranged.

7. The tool for hoisting and overhauling the planetary gear component in the seawater circulating pump of the nuclear power plant as recited in claim 6,

the lifting lug is 4 for cooperation chain block and cross hanging beam.

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