CN210154487U - Nuclear power plant pump impeller size measuring tool - Google Patents
Nuclear power plant pump impeller size measuring tool Download PDFInfo
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- CN210154487U CN210154487U CN201921105326.5U CN201921105326U CN210154487U CN 210154487 U CN210154487 U CN 210154487U CN 201921105326 U CN201921105326 U CN 201921105326U CN 210154487 U CN210154487 U CN 210154487U
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- impeller
- dummy shaft
- nuclear power
- spacing sleeve
- power plant
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Abstract
The utility model relates to a nuclear power maintenance technical field specifically discloses a nuclear power plant pump impeller size measuring tool, through the initial position measured value of record percentage table, then manual dish moves the revolving stage, makes the impeller that awaits measuring use the axle to rotate as the center to measure the numerical value of recording each position of impeller that awaits measuring respectively, obtain the size and the morpheme deviation of each position of impeller that awaits measuring through the calculation, and judge whether satisfy the operation requirement according to the deviation value. The utility model discloses size and shape and position deviation when measuring tool can realize that pump impeller spare part is accepted are measured to and the control in impeller key dimension and clearance when the pump preventative overhauls, improve maintenance efficiency, shorten the maintenance time limit for a project, reduce the cost of overhaul, guarantee the maintenance quality.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power maintenance, concretely relates to nuclear power plant pump impeller size measuring tool.
Background
In the process of checking and accepting spare parts of a pump impeller or performing preventive maintenance in a nuclear power plant, the size and the form and position deviation of the impeller cannot be effectively and accurately measured due to the limitation of the existing measuring tool and other conditions. At present, only some external dimensions of the impeller can be measured when the spare parts of the pump impeller are checked and accepted, the deviation among the sizes of the blades cannot be measured in a contrast mode, if the size deviation among a plurality of blades of the impeller is large, the change of the running performance of the pump can be caused, the vibration is increased, and the pump is seriously damaged.
When the pump is subjected to preventive maintenance, the old impeller is subjected to size non-uniform deformation due to long-term operation corrosion and erosion, and critical sizes such as impeller opening ring runout, size deviation of blade end faces and thickness size deviation of the impeller need to be retested.
However, currently, the measurement of the sizes can be carried out only by transporting the impeller from the field to a machining workshop and installing the impeller on a lathe, so that the overhaul period and cost are increased, and the overhaul efficiency is reduced.
At present, a special nuclear power plant pump impeller size measuring tool is not available, so that an effective measuring means is not available when impeller spare parts are checked and accepted, the efficiency is low during preventive maintenance of the pump, and manpower and working hours are wasted.
Disclosure of Invention
An object of the utility model is to provide a nuclear power plant pump impeller size measuring tool makes things convenient for the measurement of size and morpheme deviation before the acceptance of impeller spare part.
The technical scheme of the utility model as follows:
a nuclear power plant pump impeller size measuring tool is used for size measurement during the acceptance of impeller spare parts and the size measurement of an impeller during the maintenance of a pump, and comprises a base, a bearing, a rotating table, a dummy shaft, a locking nut, a dial indicator, a gauge stand, an upper spacer sleeve and a lower spacer sleeve;
the bearing is positioned in the center of the inner part of the base;
the false shaft is of a frustum structure and is positioned above the base, the bottom end of the false shaft is connected with an inner ring of the bearing, the top end of the false shaft is provided with a column head, and an external thread is processed on the outer side wall of the column head;
a rotating table is fixedly arranged on the dummy shaft and close to the base; the rotary table is of a circular ring structure, and the inner central hole of the rotary table is a taper hole;
the impeller to be tested is sleeved in the middle of the dummy shaft, an upper spacer sleeve is sleeved on the dummy shaft and above the impeller to be tested, a lower spacer sleeve is sleeved on the dummy shaft and below the impeller to be tested, and the position of the impeller to be tested is fixed through the upper spacer sleeve and the lower spacer sleeve;
the upper spacing sleeve and the lower spacing sleeve are both in circular ring structures, and the central holes in the upper spacing sleeve and the lower spacing sleeve are both conical holes;
the locking nut is screwed into a column head at the top end of the dummy shaft, and the impeller to be tested is locked by the locking nut;
the dial indicator is connected with one end of the meter frame, and the other end of the meter frame is connected with the side face of the base through a bolt;
the dial indicator is arranged at the measuring point of the impeller to be measured;
recording an initial position measured value of the dial indicator, manually turning the rotary table to enable the impeller to be measured to rotate around the shaft, respectively measuring and recording numerical values of all positions of the impeller to be measured, obtaining size and form and position deviations of all positions of the impeller to be measured through calculation, and judging whether the use requirements are met according to the deviation values.
The upper surface of the upper spacer sleeve is higher than the upper surface of the dummy shaft or is flush with the upper surface of the dummy shaft.
The outer diameter of the locking nut is larger than the upper diameter of the central hole of the upper spacing sleeve.
And a gasket is arranged between the locking nut and the dummy shaft.
The bearing and the base are in transition fit.
The taper of the inner center hole of the rotating table is the same as that of the dummy shaft.
The conicity of the inner central holes of the upper spacing sleeve and the lower spacing sleeve is the same as that of the dummy shaft.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses measuring tool simple structure, easily processing production and equipment. The impeller measuring tool has the advantages that the total number of parts is not more than 10, the appearance is simple, the processing is easy, the requirement on the precision of the matched size is not high, and the installation is easy.
(2) The utility model discloses measuring tool is small, light in weight, convenient to use. The weight of the measuring tool processed according to actual conditions can be controlled to be about 20kg, the size is small, the measuring tool is convenient to store and carry, and the measuring tool can be used in spare part acceptance sites or inspection workshops.
(3) The utility model discloses measuring tool measures simple to operate to the impeller. When the impeller is measured, only the impeller to be measured and the shaft sleeve need to be arranged in the dummy shaft and are locked through the locking nut, and the installation is very convenient.
(4) The utility model discloses measuring tool measures easy operation. When the impeller is measured, the rotating table is only manually coiled, the size deviation of different positions of the impeller can be measured by adjusting the positions of the dial indicator and the meter frame, and the operation is simple.
(5) The utility model discloses size and shape and position deviation when measuring tool can realize that pump impeller spare part is accepted are measured to and the control in impeller key dimension and clearance when the pump preventative overhauls, improve maintenance efficiency, shorten the maintenance time limit for a project, reduce the cost of overhaul, guarantee the maintenance quality.
Drawings
FIG. 1 is a schematic view of a pump impeller sizing tool.
In the figure: 1. a base; 2. a bearing; 3. a rotating table; 4. a dummy shaft; 5. locking the nut; 6. a watch frame; 7. an upper spacer sleeve; 8. and a lower spacer sleeve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The nuclear power plant pump impeller size measuring tool shown in figure 1 is used for size measurement during impeller spare part acceptance and impeller size measurement during pump overhaul, and comprises a base 1, a bearing 2, a rotating platform 3, a dummy shaft 4, a locking nut 5, a dial indicator, a gauge stand 6, an upper spacer sleeve 7 and a lower spacer sleeve 8.
The bearing 2 is positioned in the center of the inner part of the base 1 and is in transition fit with the base 1.
The dummy shaft 4 is of a frustum structure and is positioned above the base 1, and the bottom end of the dummy shaft 4 is connected with the inner ring of the bearing 2.
The top end of the dummy shaft 4 is provided with a column head, and the outer side wall of the column head is processed with an external thread.
A rotating platform 3 is fixedly arranged on the dummy shaft 4 and close to the base 1.
The rotating platform 3 is of a circular ring structure, the inner center hole of the rotating platform is a taper hole, and the taper is the same as that of the dummy shaft 4.
The middle part of dummy shaft 4 is located to the impeller cover that awaits measuring, overlaps on dummy shaft 4, the top of the impeller that awaits measuring and is equipped with spacer 7, overlaps on dummy shaft 4, the below of the impeller that awaits measuring and is equipped with lower spacer 8, fixes the position of the impeller that awaits measuring through last spacer 7 and lower spacer 8.
The upper spacer sleeve 7 and the lower spacer sleeve 8 are both in a circular ring structure, the inner central holes are both taper holes, and the taper is the same as that of the dummy shaft 4. The upper surface of the upper spacer 7 is higher than the upper surface of the dummy shaft 4 or is flush with the upper surface of the dummy shaft 4.
The locking nut 5 is screwed into the column head at the top end of the dummy shaft 4, the outer diameter of the locking nut 5 is larger than the upper diameter of the central hole of the upper spacer sleeve 7, and the impeller to be measured is locked by the locking nut 5.
And a gasket is arranged between the locking nut 5 and the dummy shaft 4.
The dial indicator is connected with one end of the meter frame 6, and the other end of the meter frame 6 is connected with the side face of the base 1 through a bolt.
The meter frame 6 can be folded in a telescopic mode, and the dial indicator is arranged at the measuring point of the impeller to be measured.
Recording an initial position measured value of the dial indicator, manually turning the rotary table 3 to enable the impeller to be measured to rotate by taking the shaft as a center, respectively measuring and recording numerical values of all positions of the impeller to be measured, obtaining size and form and position deviations of all positions of the impeller to be measured through calculation, and judging whether the use requirements are met according to the deviation values.
Claims (7)
1. The utility model provides a nuclear power plant pump impeller dimension measuring tool which characterized in that: the device is used for measuring the size of an impeller when the impeller spare part is received and the size of the impeller when a pump is overhauled, and comprises a base (1), a bearing (2), a rotating platform (3), a dummy shaft (4), a locking nut (5), a dial indicator, a gauge stand (6), an upper spacing sleeve (7) and a lower spacing sleeve (8);
the bearing (2) is positioned in the center of the inner part of the base (1);
the dummy shaft (4) is of a frustum structure and is positioned above the base (1), the bottom end of the dummy shaft (4) is connected with the inner ring of the bearing (2), the top end of the dummy shaft (4) is provided with a column head, and the outer side wall of the column head is processed with an external thread;
a rotating table (3) is fixedly arranged on the dummy shaft (4) and close to the base (1); the rotating table (3) is of a circular ring structure, and the inner center hole of the rotating table is a taper hole;
the impeller to be tested is sleeved in the middle of the dummy shaft (4), an upper spacing sleeve (7) is sleeved on the dummy shaft (4) and above the impeller to be tested, a lower spacing sleeve (8) is sleeved on the dummy shaft (4) and below the impeller to be tested, and the position of the impeller to be tested is fixed through the upper spacing sleeve (7) and the lower spacing sleeve (8);
the upper spacing sleeve (7) and the lower spacing sleeve (8) are both in a circular ring structure, and the central holes in the upper spacing sleeve and the lower spacing sleeve are both taper holes;
the locking nut (5) is screwed into the column head at the top end of the dummy shaft (4), and the impeller to be tested is locked by the locking nut (5);
the dial indicator is connected with one end of the meter frame (6), and the other end of the meter frame (6) is connected with the side face of the base (1) through a bolt; the meter frame (6) can be folded in a telescopic way, and the dial indicator is arranged at the measuring point of the impeller to be measured;
recording an initial position measured value of the dial indicator, manually turning the rotary table (3) to enable the impeller to be measured to rotate by taking the shaft as the center, respectively measuring and recording numerical values of all positions of the impeller to be measured, obtaining the size and the form and position deviation of all the positions of the impeller to be measured through calculation, and judging whether the use requirements are met or not according to the deviation value.
2. The nuclear power plant pump impeller size measuring tool of claim 1, wherein: the upper surface of the upper spacer sleeve (7) is higher than the upper surface of the dummy shaft (4) or is flush with the upper surface of the dummy shaft (4).
3. The nuclear power plant pump impeller size measuring tool of claim 2, wherein: the outer diameter of the locking nut (5) is larger than the upper diameter of the central hole of the upper spacing sleeve (7).
4. A nuclear power plant pump impeller sizing tool as claimed in claim 3, wherein: a gasket is arranged between the locking nut (5) and the dummy shaft (4).
5. The nuclear power plant pump impeller size measuring tool of claim 4, wherein: the bearing (2) and the base (1) are in transition fit.
6. The nuclear power plant pump impeller size measuring tool of claim 5, wherein: the taper of the inner center hole of the rotating table (3) is the same as that of the dummy shaft (4).
7. The nuclear power plant pump impeller size measuring tool of claim 6, wherein: the conicity of the inner central holes of the upper spacing sleeve (7) and the lower spacing sleeve (8) is the same as that of the dummy shaft (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921105326.5U CN210154487U (en) | 2019-07-15 | 2019-07-15 | Nuclear power plant pump impeller size measuring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921105326.5U CN210154487U (en) | 2019-07-15 | 2019-07-15 | Nuclear power plant pump impeller size measuring tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210154487U true CN210154487U (en) | 2020-03-17 |
Family
ID=69766007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921105326.5U Active CN210154487U (en) | 2019-07-15 | 2019-07-15 | Nuclear power plant pump impeller size measuring tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210154487U (en) |
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2019
- 2019-07-15 CN CN201921105326.5U patent/CN210154487U/en active Active
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