CN209755058U

CN209755058U - Special centering tool for pump shaft of plunger pump

Info

Publication number: CN209755058U
Application number: CN201920297369.1U
Authority: CN
Inventors: 杨刚; 姜普发; 周育涛
Original assignee: China General Nuclear Power Corp; Guangxi Fangchenggang Nuclear Power Co Ltd
Current assignee: China General Nuclear Power Corp; Guangxi Fangchenggang Nuclear Power Co Ltd
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2019-12-10
Anticipated expiration: 2029-03-08

Abstract

The utility model discloses a centering specialized tool of plunger pump shaft, pump shaft install in the bell jar of plunger pump, and centering specialized tool includes fixed part, table frame portion and rotating part. The fixing part is cylindrical and comprises a spline hole, and the spline hole is used for being matched with a spline shaft at the shaft end of the pump shaft; the watch frame part is disc-shaped, the watch frame part and the fixing part are concentrically arranged on the upper end surface of the fixing part, and the center of the watch frame part is provided with a mounting hole; the rotating part is in a long rod shape, one end of the rotating part is provided with an installation part, and the installation part is installed in the installation hole; wherein the rotating part can drive the pump shaft to rotate through the watch frame part and the fixing part. The utility model discloses a centering specialized tool can not detect through the centering that the mould operation can solve the plunger pump shaft to guarantee the centering quality.

Description

Special centering tool for pump shaft of plunger pump

Technical Field

The utility model relates to a nuclear power plant equipment overhauls the field, especially relates to a centering specialized tool of plunger pump shaft that germany doctor li le made.

Background

The first-stage EH oil tank of the nuclear power plant for preventing urban harbours is manufactured by German Drshilier, and one unit comprises three oil tanks. Two plunger pumps are vertically arranged on each oil tank, a TGL-nylon inner gear ring type coupling is selected in the middle to transmit power, and a motor is vertically arranged; since the plunger pump is mounted within the bell jar, the center cannot be measured through the shelf table.

the first-stage EH oil tank of the urban harbor nuclear power plant provides control oil for the high-pressure valve group and the reheat valve group oil engine. The oil tank is made by German doctor Lee, and one unit has three oil tanks. The No. 1 control oil tank provides and recovers pressure oil in the high-pressure valve actuating mechanism, the No. 2 control oil tank and the No. 3 control oil tank provide and recover pressure oil in the reheating valve actuating mechanisms on two sides. The main oil pump of the oil tank is controlled by an axial plunger pump controlled by pressure, and the two pumps have 100 percent of capacity and are arranged one by one. The unit of the same type prevents that urban and rural nuclear power, Yangjiang nuclear power all take place plunger pump shaft coupling elastic block damage trouble many times, and according to the on-the-spot maintenance condition, the whole ring tooth's socket of position that polyamide shaft coupling and pump shaft tooth's socket link to each other has all strickleed off, and the tooth's socket of being connected with the motor end is then intact. The tooth socket is strickleed off and is led to shaft coupling and pump shaft end tooth socket to lose the cooperation, and the motor can't transmit the moment of torsion to the pump. After the coupler is damaged, the motor is started, the motor belongs to an idle running state, and the pump cannot be driven to run, so that pressure cannot be built. After the model expansion analysis, the root cause is that the concentricity of the plunger pump shaft is unqualified, so that the elastic block of the connected coupler is damaged prematurely.

The difficulty of detecting the concentricity of the plunger pump by making the rubbing die is very high, the labor and the time are very consumed, the specific operation needs to hoist the motor, a cylindrical barrel is made on the plunger pump to fix the rubbing die paste, the rubbing die paste is quickly put into the cylindrical barrel after being mixed, the motor is quickly aligned and put into the cylindrical barrel, then the bolt is tightened, and the whole process can be solidified in 10 seconds. Moreover, the success probability is very low, and 5-6 times of model expansion experiments are required to be performed when a central check of the plunger pump is performed. The qualified pattern expanding sample is required to be subjected to slice analysis and data measurement, and the centering method is high in difficulty and low in accuracy, so that a special centering tool needs to be innovatively manufactured for a plunger pump to detect the center.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centering specialized tool of plunger pump shaft, it can not detect through the centering that extends the mould operation can solve the plunger pump shaft.

In order to achieve the above object, the utility model provides a centering specialized tool of plunger pump shaft, the pump shaft is installed in the bell jar of plunger pump, and centering specialized tool includes fixed part, table frame portion and rotating part. The fixing part is cylindrical and comprises a spline hole, and the spline hole is used for being matched with a spline shaft at the shaft end of the pump shaft; the watch frame part is disc-shaped, the watch frame part and the fixing part are concentrically arranged on the upper end surface of the fixing part, and the center of the watch frame part is provided with a mounting hole; the rotating part is in a long rod shape, one end of the rotating part is provided with an installation part, and the installation part is installed in the installation hole; wherein the rotating part can drive the pump shaft to rotate through the watch frame part and the fixing part.

In a preferred embodiment, the end face of the fixing portion is provided with a plurality of threaded holes symmetrically distributed about the axial center thereof.

In a preferred embodiment, the watch frame portion is provided with a plurality of connecting holes symmetrically distributed around the center of the watch frame portion, and the positions of the connecting holes are matched with the positions of the threaded holes.

In a preferred embodiment, the plurality of attachment holes are used to fix the case band portion to the plurality of screw holes of the fixing portion by bolts.

In a preferred embodiment, the other end of the rotating portion is provided with a through hole perpendicular to the axis of the rotating portion.

In a preferred embodiment, the special centering tool for the pump shaft of the plunger pump further comprises a rotating handle which is arranged in the through hole in a penetrating mode, and the rotating handle is used for an operator to rotate so as to drive the special centering tool and the pump shaft to rotate.

In a preferred embodiment, the mounting hole of the watch frame portion is a spline hole, a screw hole, or a square hole.

In a preferred embodiment, the mounting portion of the rotating portion is a spline, a thread or a square head.

In a preferred embodiment, the splines, threads or square heads are adapted to fit within the splined, threaded or square bores.

Compared with the prior art, the utility model discloses a centering specialized tool of plunger pump shaft has following beneficial effect: the centering problem of the pump shaft of the plunger pump can be detected without the mould expanding operation, the problem of damage of the elastic block of the main oil pump is thoroughly solved, the center of the plunger pump is rechecked in each round of overhaul, and equipment maintenance and fault location are guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of a centering tool according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an operation of the centering tool according to an embodiment of the present invention.

Description of the main reference numerals:

1-fixed part, 2-watch frame part, 3-bolt, 4-rotating part, 5-rotating handle, 6-pump shaft, 7-bell housing and 8-watch frame assembly.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a centering special tool according to an embodiment of the present invention. According to the utility model discloses preferred embodiment's centering specialized tool of plunger pump shaft, pump shaft 6 is installed in plunger pump's bell jar 7, and centering specialized tool includes fixed part 1, watch frame portion 2 and rotating part 4.

In some embodiments, the fixing portion 1 is cylindrical and is generally made of a section of round steel, a spline hole capable of being matched with the spline shaft at the shaft end of the plunger pump shaft 6 is machined in the center of the round steel, and then at least two threaded holes are symmetrically and uniformly distributed on one end face of the round steel according to the center of the spline hole.

In some embodiments, the watch frame part 2 can be made into a disk shape by using a steel plate, at least two connecting holes which are symmetrical and uniformly distributed around the center of the disk are processed on the disk, and the number and the positions of the connecting holes are matched with the threaded holes on the fixing part 1. Then, the fixing portion 1 and the watch frame portion 2 are concentrically fixed together by the bolt 3. The connection between the fixed part 1 and the frame part 2 can be welded, so long as the connection is coaxial. But are more easily stored without space when not in use by means of the bolt 3.

In some embodiments, a mounting hole is machined at the center of the watch frame part 2, and the mounting hole may be a spline hole, a threaded hole, or a square hole, etc., but the present invention is not limited thereto. The rotating part 4 can adopt the round steel to make long rod-shaped equally, and the installation department of the one end processing preparation of rotating part 4, installation department should make can with table frame portion 2 spline, screw hole or square hole etc. cooperation installation spline, screw thread or square head etc. all can. Meanwhile, a through hole perpendicular to the axis of the rotating part 4 is processed at the other end of the rotating part 4, a steel rod is arranged in the through hole in a penetrating mode to serve as a rotating handle 5, and therefore the special centering tool and the pump shaft 6 can be driven to rotate by rotating the rotating handle 5.

As shown in fig. 2, fig. 2 is a schematic diagram of an operation of the centering special tool according to an embodiment of the present invention. In some embodiments, the practical working process of the centering special tool for the pump shaft of the plunger pump of the present invention is as follows: firstly, after the centering special tool is firmly installed with a pump shaft 6 of a plunger pump, a rotating handle 5 is rotated to see whether the pump shaft 6 can be smoothly driven to rotate or not; next, the jig table assembly 8 is set on the table frame portion 2, the jig table assembly 8 itself includes a magnetic base, a universal adjusting lever, and a test table, the magnetic base is attached to the upper surface of the disk of the table frame portion 2, the universal adjusting lever is adjusted so that the test head of the test table is perpendicular to the inner surface of the bell jar 7, and the home position and the zero setting are recorded. Then the rotating handle 5 is rotated to enable the centering special tool and the pump shaft 6 to rotate, at the moment, the testing head of the testing meter can rotate along the inner surface of the bell-shaped cover 7 along with the meter frame part 2, whether the reading of the testing meter is within an allowed numerical range is observed and recorded at any time, the testing meter rotates once to return to the original position to complete one test, the same tests are repeated for a plurality of times, and then the pump shaft 6 of the plunger pump is adjusted according to the reading of the testing meter. After adjustment, the test is repeated again until the pump shaft 6 is completely aligned, and the centering test can be finished.

To sum up, the utility model discloses a centering specialized tool of plunger pump shaft has following beneficial effect: the centering problem of the pump shaft of the plunger pump can be detected without the mould expanding operation, the problem of damage of the elastic block of the main oil pump is thoroughly solved, and the centering device is used for rechecking the center of the plunger pump in each round of overhaul, so that the equipment maintenance and fault positioning are ensured; after the special alignment tool is adopted, the alignment detection efficiency is greatly improved, the labor intensity of maintainers is reduced, the monitoring difficulty is greatly reduced without adopting a die expanding operation, and the maintenance cost is reduced.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A special tool for centering a pump shaft of a plunger pump, the pump shaft being installed in a bell housing of the plunger pump, the special tool for centering comprising:

The fixing part is cylindrical and comprises a spline hole, and the spline hole is used for being matched and mounted with a spline shaft at the shaft end of the pump shaft;

A dial portion having a disk shape, the dial portion being provided on an upper end surface of the fixing portion concentrically with the fixing portion, the dial portion having a mounting hole at a center thereof; and

The rotating part is in a long rod shape, one end of the rotating part is provided with an installation part, and the installation part is installed in the installation hole;

Wherein rotating the rotating portion can drive the pump shaft to rotate via the watch frame portion and the fixing portion.

2. The special centering tool for the pump shaft of the plunger pump according to claim 1, wherein the end face of the fixing portion is provided with a plurality of threaded holes symmetrically distributed about the axial center thereof.

3. The special centering tool for the pump shaft of the plunger pump according to claim 2, wherein the dial frame portion is provided with a plurality of connecting holes which are symmetrically distributed around the center of the dial frame portion, and the positions of the connecting holes are matched with the positions of the threaded holes.

4. The special centering tool for a pump shaft of a plunger pump according to claim 3, wherein said plurality of attachment holes are used for fixing said frame part to said plurality of threaded holes of said fixing part by means of bolts.

5. The special centering tool for the pump shaft of the plunger pump according to claim 1, wherein the other end of the rotating portion is provided with a through hole perpendicular to the axial center of the rotating portion.

6. The special centering tool for the pump shaft of the plunger pump according to claim 5, further comprising a rotating handle inserted into the through hole, wherein the rotating handle is rotated by an operator to drive the special centering tool and the pump shaft to rotate.

7. the special centering tool for a pump shaft of a plunger pump according to claim 1, wherein the mounting hole of the gauge stand portion is a splined hole, a threaded hole, or a square hole.

8. The special tool for centering a pump shaft of a plunger pump according to claim 7, wherein the mounting portion of the rotating portion is a spline, a thread, or a square head.

9. The special tool for centering a pump shaft of a plunger pump according to claim 8, wherein the spline, the thread or the square head is configured to be installed in the spline hole, the threaded hole or the square hole.