CN113154994A - Device and method for measuring overhauling air gap of giant water turbine generator - Google Patents
Device and method for measuring overhauling air gap of giant water turbine generator Download PDFInfo
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- CN113154994A CN113154994A CN202110490573.7A CN202110490573A CN113154994A CN 113154994 A CN113154994 A CN 113154994A CN 202110490573 A CN202110490573 A CN 202110490573A CN 113154994 A CN113154994 A CN 113154994A
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- measuring rod
- connecting rod
- rod sleeve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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Abstract
The invention discloses a device and a method for measuring the overhauling air gap of a giant water turbine generator, and belongs to the technical field of measuring tools. One end of the connecting rod sleeve is connected with the measuring rod sleeve, and the other end of the connecting rod sleeve extends into the rotating handle and is connected with the rotating handle; the locking knob is connected with the rotary handle; the connecting rod is sleeved in the connecting rod sleeve in a penetrating manner, one end of the connecting rod is connected with the rotating handle, and the other end of the connecting rod extends into the measuring rod sleeve and is connected with the gear; the first movable measuring rod is provided with a first rack, one end of the first movable measuring rod is provided with a first measuring ball head, and the other end of the first movable measuring rod is sleeved in the measuring rod sleeve; the second movable measuring rod is provided with a second rack, one end of the second movable measuring rod is provided with a second measuring ball head, and the other end of the second movable measuring rod is sleeved in the measuring rod sleeve; two sides of the gear are respectively and simultaneously meshed with the first rack and the second rack, and measurement is carried out through the extension or retraction of the first movable measuring rod and the second movable measuring rod. The invention has reasonable structural design and simple and convenient operation, does not depend on the experience and skill level of an operator, and can accurately measure the air gaps of the stator and the rotor of the generator at different positions and depths.
Description
Technical Field
The invention belongs to the technical field of measuring tools, and particularly relates to a device and a method for measuring the overhaul air gap of a giant water turbine generator.
Background
According to investigation, the problem that the vibration of stator bases of different degrees exceeds the standard exists in part of the large water turbine generator sets which are put into production successively at present. Taking a certain hydraulic power plant as an example, the single machine capacity of the hydraulic power plant is 700MW, the horizontal vibration of the stator frame of the unit under the 700MW working condition is relatively large, and the requirement in the implementation scheme is processed according to the low-frequency vibration of the stator of the power plant: the air gap at the 500mm depth position of the upper part and the lower part of the stator and the rotor of the generator needs to be accurately measured, the unbalanced magnetic pull force is improved, and the vibration value of the stator and the base of the processed unit is ensured to be less than 80 microns. The air gap value of the stator and the rotor is closely related to the unbalanced magnetic tension, is a core value for processing the low-frequency vibration of the stator, and needs to be measured accurately. The conventional measuring tool cannot meet the requirements of measuring precision and measuring depth.
The diameter of a stator and a rotor of a generator of the giant hydroelectric generating set is large, the air gap is small, the selectivity of a measuring tool is low, a rotor magnetic pole and a stator iron core are sealed in a wind shield, the positions of equipment and the measuring tool are mutually crossed and interfered due to the mechanism design of a part of the generating set, the traditional measuring tool cannot meet the measuring process requirement of an overhaul site, and the measuring accuracy and the measuring work efficiency are seriously influenced.
For example, when the wedge-shaped slider is used for measurement, the distance between the handles of the two sliders is increased when the sliders move, so that the reading error is large, and the two sliders are difficult to align completely when the measurement is started, so that the measurement precision cannot meet the requirement of accurate measurement. When a stator and rotor air gap of a generator of a certain hydraulic power plant is used for measurement, the tool is shielded by a stator and rotor wind shield and cannot be used, and when the C-shaped caliper is used for measurement, the overall dimension of the C-shaped caliper is limited by the installation position. The self-made simple tool has too large measurement error and can not meet the quality requirement of unit maintenance.
Disclosure of Invention
In order to solve the problems that the conventional measuring tool is limited in equipment installation position, measuring depth and measuring accuracy are insufficient, the invention aims to provide the device and the method for measuring the overhaul air gap of the giant water turbine generator, the structural design is reasonable, the operation is simple and convenient, the experience and skill level of an operator are not depended on, and the air gaps of different positions and depths of the stator and the rotor of the generator can be accurately measured.
The invention is realized by the following technical scheme:
the invention discloses a device for measuring the overhauling air gap of a giant water turbine generator, which comprises a rotary handle, a locking knob, a connecting rod sleeve, a connecting rod, a first movable measuring rod, a second movable measuring rod, a measuring rod sleeve and a gear, wherein the rotary handle is connected with the connecting rod sleeve through the gear;
one end of the connecting rod sleeve is connected with the measuring rod sleeve, and the other end of the connecting rod sleeve extends into the rotating handle and is connected with the rotating handle; the locking knob is connected with the rotary handle and can lock the connecting rod sleeve; the connecting rod is sleeved in the connecting rod sleeve in a penetrating manner, one end of the connecting rod is connected with the rotating handle, and the other end of the connecting rod extends into the measuring rod sleeve and is connected with the gear; the first movable measuring rod is provided with a first rack, the exposed end of the first movable measuring rod is provided with a first measuring ball head, and the other end of the first movable measuring rod is sleeved in the measuring rod sleeve; a second rack is arranged on the second movable measuring rod, a second measuring ball head is arranged at the exposed end of the second movable measuring rod, and the other end of the second movable measuring rod is sleeved in the measuring rod sleeve; two sides of the gear are respectively and simultaneously meshed with the first rack and the second rack; when the rotating handle rotates to drive the gear to rotate through the connecting rod, the first movable measuring rod and the second movable measuring rod extend or retract simultaneously.
Preferably, the first movable measuring rod and the second movable measuring rod are respectively connected with the inside of the measuring rod sleeve through a slide block and slide rail structure.
Further preferably, the length of the slide rail is the maximum range of the device.
Preferably, the first rack and the second rack are respectively provided with a limiting structure.
Preferably, the outside of the rotary handle is provided with an anti-slip layer.
Preferably, the first measuring ball head and the second measuring ball head are provided with wear-resistant layers.
Preferably, the outside of the connecting rod sleeve is provided with dimension scale marks.
Further preferably, the size scale markings are fluorescent markings.
Preferably, the measuring rod sleeve is provided with a plurality of exhaust holes.
The invention discloses a method for measuring the overhaul air gap by adopting the device for measuring the overhaul air gap of the giant water turbine generator, which comprises the following steps:
one end of the measuring rod sleeve is placed in a generator overhauling air gap to be measured, and the position is adjusted until the connecting rod sleeve is parallel to the axis of the generator; adjusting the position of the measuring rod sleeve, rotating the rotary handle to enable the first movable measuring rod and the second movable measuring rod to extend or retract simultaneously, and searching the position with the shortest distance, namely the generator overhauling air gap; rotating the locking knob to lock the rotating handle and the connecting rod sleeve, and taking out the device; and measuring the linear distance between the first measuring ball head and the second measuring ball head by using an external micrometer, and reading to obtain the numerical value of the air gap for overhauling the generator.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the device for measuring the overhauling air gap of the giant water turbine generator, the connecting rod and the gear are driven to rotate through rotation of the rotary handle, and the first movable measuring rod and the second movable measuring rod extend or retract simultaneously, so that the overhauling air gap of the generator is measured, and the problems that a conventional measuring tool is limited in equipment installation position, measuring depth and measuring accuracy are insufficient are solved. The gear connection ensures that the movable measuring rod and the measuring ball head do not slide relatively. Meanwhile, the rotating handle is connected with the measuring rod sleeve through the connecting rod sleeve and is connected with the gear through the connecting rod, and therefore measurement of various shapes and depths can be met. Compare wedge chock and the C type calliper that present measurement gap adopted, solved wedge chock because of overall dimension is limited, sheltered from by the deep bead and can not use, measurement error that relative slip produced between the wedge chock are big and can only measure the generator air gap of upper end, can not measure the problem of the generator air gap of deeper position. The problem of C type calliper because of overall dimension is limited, sheltered from by the deep board and can not use, can not measure great and can not measure generator middle part air gap because of the measuring error that the locking insecure leads to is big is solved. The invention has reasonable structural design and simple and convenient operation, does not depend on the experience and skill level of an operator, and can accurately measure the air gaps of the stator and the rotor of the generator at different positions and depths.
Furthermore, the first movable measuring rod and the second movable measuring rod are connected with the measuring rod sleeve through the sliding block sliding rail structure, so that the first movable measuring rod and the second movable measuring rod can only move in the axis direction, and errors caused by the movement in other directions are avoided.
Furthermore, the length of the sliding rail is the maximum measuring range of the device, and the first movable measuring rod and the second movable measuring rod are prevented from extending out of the rail and derailing.
Furthermore, the first rack and the second rack are respectively provided with a limiting structure, so that the gear is prevented from sliding out of the rack.
Furthermore, the outside of the rotating handle is provided with an anti-skid layer, which is convenient for operation.
Furthermore, the first measuring ball head and the second measuring ball head are provided with wear-resistant layers, so that errors caused by wear are avoided.
Furthermore, the size scale mark is arranged outside the connecting rod sleeve, so that an operator can conveniently master the approximate position of the measuring end.
Furthermore, the size scale mark is a fluorescent mark, so that the mark can be clearly seen when the light is poor.
Furthermore, the measuring rod sleeve is provided with a plurality of exhaust holes, so that inconvenience in operation of the first movable measuring rod and the second movable measuring rod due to a piston effect is avoided, and efficiency and operation hand feeling are improved.
The method for measuring the overhaul air gap by adopting the device for measuring the overhaul air gap of the giant water turbine generator is simple and convenient to operate, does not depend on the experience and skill level of an operator, can accurately measure the air gap of different positions and depths of a stator and a rotor of the generator, ensures that the measurement error is only 0.01mm by using a micrometer to measure the reading, and has good application prospect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a first movable measuring rod;
FIG. 3 is a schematic view of the relative positions of a first movable measuring rod and a second movable measuring rod;
fig. 4 is a schematic structural diagram of the engagement of the first movable measuring rod, the second movable measuring rod and the gear.
In the figure: 1-a rotating handle, 2-a locking knob, 3-a connecting rod sleeve, 4-a connecting rod, 5-a first movable measuring rod, 5-1-a first rack, 5-2-a first measuring ball head, 6-a second movable measuring rod, 6-1-a second rack, 6-2-a second measuring ball head, 7-a measuring rod sleeve and 8-a gear.
Detailed Description
The invention will now be described in further detail with reference to the following drawings and specific examples, which are intended to be illustrative and not limiting:
referring to fig. 1, the device for measuring the air gap during the overhaul of the giant water turbine generator comprises a rotary handle 1, a locking knob 2, a connecting rod sleeve 3, a connecting rod 4, a first movable measuring rod 5, a second movable measuring rod 6, a measuring rod sleeve 7 and a gear 8.
One end of the connecting rod sleeve 3 is connected with the measuring rod sleeve 7, and the other end of the connecting rod sleeve extends into the rotating handle 1 and is connected with the rotating handle 1; the locking knob 2 is connected with the rotary handle 1 and can lock the connecting rod sleeve 3; the connecting rod 4 is sleeved in the connecting rod sleeve 3 in a penetrating manner, one end of the connecting rod is connected with the rotating handle 1, and the other end of the connecting rod extends into the measuring rod sleeve 7 and is connected with the gear 8.
As shown in fig. 2, a first rack 5-1 is arranged on the first movable measuring rod 5, a first measuring ball head 5-2 is arranged at the exposed end of the first movable measuring rod 5, and the other end of the first movable measuring rod is sleeved in the measuring rod sleeve 7; the second movable measuring rod 6 is provided with a second rack 6-1, the exposed end of the second movable measuring rod 6 is provided with a second measuring ball head 6-2, and the other end of the second movable measuring rod is sleeved inside the measuring rod sleeve 7.
As shown in fig. 4, both sides of the gear 8 are simultaneously engaged with the first rack 5-1 and the second rack 6-1, respectively; when the rotary handle 1 rotates to drive the gear 8 to rotate through the connecting rod 4, the first movable measuring rod 5 and the second movable measuring rod 6 extend or retract simultaneously.
In a preferred embodiment of the present invention, the first movable measuring rod 5 and the second movable measuring rod 6 are connected with the inside of the measuring rod sleeve 7 through a slider-slide rail structure respectively. Specifically, the outer walls of the first movable measuring rod 5 and the second movable measuring rod 6 can be provided with slide blocks, and the inner wall of the measuring rod sleeve 7 is provided with a slide rail; the outer walls of the first movable measuring rod 5 and the second movable measuring rod 6 can be provided with slide rails, and the inner wall of the measuring rod sleeve 7 is provided with a slide block. Preferably, the length of the slide rail is the maximum range of the device, so as to avoid sliding out of the slide rail.
In a preferred embodiment of the present invention, the first rack 5-1 and the second rack 6-1 are respectively provided with a limit structure. One implementation form is shown in fig. 3, a first rack 5-1 and a second rack 6-1 are respectively arranged in the middle of a first movable measuring rod 5 and a second movable measuring rod 6, and two ends of the first movable measuring rod 5 and the second movable measuring rod 6 are respectively provided with a part without the first rack 5-1 and the second rack 6-1.
In a preferred embodiment of the invention, the outside of the handle 1 is provided with an anti-slip layer. Can be anti-skid lines and sand blasting treatment; or a detachable nylon and rubber anti-slip sleeve.
In a preferred embodiment of the invention, the first measuring ball head 5-2 and the second measuring ball head 6-2 are provided with wear-resistant layers; may be a metal plating.
In a preferred embodiment of the invention, the connecting rod bushing 3 is externally provided with size scale markings. Preferably, the size scale markings are fluorescent markings.
In a preferred embodiment of the invention, the measuring rod sleeve 7 is provided with a plurality of air vents. The exhaust holes are respectively arranged at the side close to the first movable measuring rod 5 and the side close to the second movable measuring rod 6.
The method for measuring the overhauling air gap of the giant water turbine generator by adopting the device comprises the following steps:
one end of the measuring rod sleeve 7 is placed in a generator overhauling air gap to be measured, and the position is adjusted until the connecting rod sleeve 3 is parallel to the axis of the generator; adjusting the position of the measuring rod sleeve 7, rotating the rotating handle 1 to enable the first movable measuring rod 5 and the second movable measuring rod 6 to extend or retract simultaneously, and searching the position with the shortest distance, namely the generator overhauling air gap; rotating the locking knob 2 to lock the rotating handle 1 and the connecting rod sleeve 3, and then taking out the device; and measuring the linear distance between the tops of the first measuring ball head 5-2 and the second measuring ball head 6-2 by using an outside micrometer, and reading to obtain the numerical value of the generator overhauling air gap.
It should be noted that the above description is only a part of the embodiments of the present invention, and equivalent changes made to the system described in the present invention are included in the protection scope of the present invention. Persons skilled in the art to which this invention pertains may substitute similar alternatives for the specific embodiments described, all without departing from the scope of the invention as defined by the claims.
Claims (10)
1. A device for measuring the overhauling air gap of a giant water turbine generator is characterized by comprising a rotary handle (1), a locking knob (2), a connecting rod sleeve (3), a connecting rod (4), a first movable measuring rod (5), a second movable measuring rod (6), a measuring rod sleeve (7) and a gear (8);
one end of the connecting rod sleeve (3) is connected with the measuring rod sleeve (7), and the other end of the connecting rod sleeve extends into the rotating handle (1) and is connected with the rotating handle (1); the locking knob (2) is connected with the rotary handle (1) and can lock the connecting rod sleeve (3); the connecting rod (4) is sleeved in the connecting rod sleeve (3) in a penetrating way, one end of the connecting rod is connected with the rotating handle (1), and the other end of the connecting rod extends into the measuring rod sleeve (7) and is connected with the gear (8); a first rack (5-1) is arranged on the first movable measuring rod (5), a first measuring ball head (5-2) is arranged at the exposed end of the first movable measuring rod (5), and the other end of the first movable measuring rod is sleeved in a measuring rod sleeve (7); a second rack (6-1) is arranged on the second movable measuring rod (6), a second measuring ball head (6-2) is arranged at the exposed end of the second movable measuring rod (6), and the other end of the second movable measuring rod is sleeved in the measuring rod sleeve (7); two sides of the gear (8) are respectively and simultaneously meshed with the first rack (5-1) and the second rack (6-1); when the rotating handle (1) rotates and drives the gear (8) to rotate through the connecting rod (4), the first movable measuring rod (5) and the second movable measuring rod (6) extend or retract simultaneously.
2. The device for measuring the overhauling air gap of the giant water turbine generator as claimed in claim 1, wherein the first movable measuring rod (5) and the second movable measuring rod (6) are respectively connected with the inside of the measuring rod sleeve (7) through a slide block and slide rail structure.
3. The apparatus of claim 2, wherein the length of the sliding rail is the maximum range of the apparatus.
4. The device for measuring the overhaul air gap of the giant water turbine generator according to claim 1, wherein the first rack (5-1) and the second rack (6-1) are respectively provided with a limiting structure.
5. The device for measuring the overhaul air gap of the giant water turbine generator according to claim 1, wherein an anti-slip layer is arranged outside the rotating handle (1).
6. The device for measuring the overhaul air gap of the giant hydro generator according to claim 1, wherein the first measuring bulb (5-2) and the second measuring bulb (6-2) are provided with wear-resistant layers.
7. The device for measuring the overhaul air gap of the giant water turbine generator as claimed in claim 1, wherein the outside of the connecting rod sleeve (3) is provided with a dimension scale mark.
8. The apparatus of claim 7, wherein the size scale markings are fluorescent markings.
9. The device for measuring the overhaul air gap of the giant water turbine generator as claimed in claim 1, wherein the measuring rod sleeve (7) is provided with a plurality of exhaust holes.
10. The method for measuring the overhaul air gap by adopting the device for measuring the overhaul air gap of the giant water turbine generator as claimed in any one of claims 1 to 9 is characterized by comprising the following steps of:
one end of the measuring rod sleeve (7) is placed in a generator maintenance air gap to be measured, and the position is adjusted until the connecting rod sleeve (3) is parallel to the axis of the generator; adjusting the position of the measuring rod sleeve (7), rotating the rotating handle (1) to enable the first movable measuring rod (5) and the second movable measuring rod (6) to extend or retract simultaneously, and finding the position with the shortest distance, namely the generator overhauling air gap; rotating the locking knob (2) to lock the rotating handle (1) and the connecting rod sleeve (3), and taking out the device; and measuring the linear distance between the tops of the first measuring ball head (5-2) and the second measuring ball head (6-2) by using an external micrometer, and reading to obtain the numerical value of the air gap for overhauling the generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490573.7A CN113154994A (en) | 2021-05-06 | 2021-05-06 | Device and method for measuring overhauling air gap of giant water turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490573.7A CN113154994A (en) | 2021-05-06 | 2021-05-06 | Device and method for measuring overhauling air gap of giant water turbine generator |
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| Publication Number | Publication Date |
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| CN113154994A true CN113154994A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110490573.7A Pending CN113154994A (en) | 2021-05-06 | 2021-05-06 | Device and method for measuring overhauling air gap of giant water turbine generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865468A (en) * | 2021-11-16 | 2021-12-31 | 国网四川省电力公司映秀湾水力发电总厂 | Special dipperstick of motor stator rotor air gap |
-
2021
- 2021-05-06 CN CN202110490573.7A patent/CN113154994A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865468A (en) * | 2021-11-16 | 2021-12-31 | 国网四川省电力公司映秀湾水力发电总厂 | Special dipperstick of motor stator rotor air gap |
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