CN217687074U - Measuring tool at center of tile pit - Google Patents
Measuring tool at center of tile pit Download PDFInfo
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- CN217687074U CN217687074U CN202221359761.2U CN202221359761U CN217687074U CN 217687074 U CN217687074 U CN 217687074U CN 202221359761 U CN202221359761 U CN 202221359761U CN 217687074 U CN217687074 U CN 217687074U
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- rotor
- displacement sensor
- eddy current
- current displacement
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Abstract
A measuring tool of a tile pit center relates to the technical field of steam turbine and compressor detection, and is installed on a rotor at the center of an inner circle of a compressor or a steam turbine cylinder body, and comprises a fixing clamp, a connecting piece and an eddy current displacement sensor, wherein the rotor is used as a rotating shaft for measuring the tile pit center, the fixing clamp is fixed on the rotor, one end of the connecting piece is fixed on the fixing clamp, the eddy current displacement sensor is fixed on the other end of the connecting piece, the eddy current displacement sensor is arranged along the radial direction of the rotor, the diameter parallelism deviation of the eddy current displacement sensor and the rotor is not more than +/-0.5 mm, and the angle deviation is not more than +/-12 degrees; the eddy current displacement sensor is connected with the DCS host machine by using a lead, the lead is fixed on the rotor, and the length of the lead is larger than the perimeter of the rotor. The utility model discloses simple structure, design benefit, installation make full use of compressor unit existing equipment facility, convenient to use moreover, the dependable performance, measurement accuracy is high, and the error is very little.
Description
Technical Field
The utility model relates to a steam turbine and compressor detect technical field, specifically are a measuring tool at tile nest center.
Background
The bearing support system of the compressor and the steam turbine is generally supported by a sliding bearing, the bearing system is connected with the compressor body by adopting a spigot or a pin for positioning, and the connection of the steam turbine bearing system and the cylinder body basically adopts a sliding pin and lap joint. The concentricity of the cylinder body and the bearing system can be changed due to factors such as vibration, thermal deformation, stress release and the like during the operation of the compressor and the steam turbine, so that series operation faults can be generated, and the condition of checking the concentricity (or called tile nest center) of the rotor and the cylinder body of the equipment during the overhaul of the equipment is particularly important. Currently, there are three main detection methods: firstly, a steel wire drawing method is adopted for measurement, a micrometer is adopted for measurement, and secondly, a false axis method is adopted for measurement, and a dial indicator is used for measurement, however, the two methods are low in fixed point precision, more in reference data, large in reading and accumulated error, large in disturbance degree of a steel wire or a false axis, and large in influence of gravity and disturbance degree on rotation of a gauge stand; and thirdly, the direct measurement of the running rotor is adopted, and a lever dial indicator is installed by utilizing a rotor dynamic balance screw preformed hole and the like for measurement, but the method has large limitation on measurement and data reading space, and basically cannot carry out detection under the condition that components of the compressor are not disassembled, and the measurement mode is point measurement.
Due to the reasons, the existing measurement method is low in overall measurement accuracy, but the manufacturing accuracy of the compressor and the steam turbine is higher and higher at present, and the requirements on the corresponding detection means and the detection accuracy are also correspondingly improved. In the maintenance of high-precision compressors and turbines, particularly for the structural characteristics of the existing novel compressors and turbines, position changes can be generated among various factors during operation, and basically the center of a bearing bush pit must be checked and adjusted in one operation period.
Disclosure of Invention
For providing a convenient to use and the high instrument that is used for measuring steam turbine and compressor equipment rotor and cylinder body concentricity of measurement accuracy, the utility model provides a measuring tool at tile nest center.
A measuring tool of a tile nest center is installed on a rotor at the center of an inner circle of a compressor or a steam turbine cylinder body, and is characterized by comprising a fixing clamp, a connecting piece and an eddy current displacement sensor, wherein the rotor is used as a rotating shaft for measuring the tile nest center, the fixing clamp is fixed on the rotor, one end of the connecting piece is fixed on the fixing clamp, the eddy current displacement sensor is fixed on the other end of the connecting piece, the eddy current displacement sensor is arranged along the radial direction of the rotor, the diameter parallelism deviation of the eddy current displacement sensor and the rotor is not more than +/-0.5 mm, and the angle deviation is not more than +/-12 degrees; the eddy current displacement sensor is connected with the DCS host machine by using a lead, the lead is fixed on the rotor, and the length of the lead is larger than the perimeter of the rotor.
Preferably, the fixing clamp is a combination of a hoop and a screw, a combination of a clamping plate and a screw or a magnetic seat.
Preferably, the connecting member is an L-shaped rod or bracket.
Preferably, the connecting piece and the fixing clamp are fixed by bolts or welding.
Preferably, the eddy current displacement sensor uses a 5mm eddy current displacement sensor.
The gap between the eddy current displacement sensor and the inner circle of the cylinder body is 0.5 mm-2.5 mm, and the optimal distance is 1.25mm.
The beneficial effects of the utility model reside in that: in the actual work of detecting the center of the bearing bush, only three-point data of the equipment rotor and the lower half cylinder body of the equipment are needed to be read, namely three points on the left, the right and the right are needed to judge the deviation condition of the center of the bearing bush of the rotor at the position, two points are determined along the direction of the rotor to carry out data measurement, and the deviation condition of the whole rotor and the bearing bush of the equipment cylinder body can be judged, so that the adjustment work of equipment maintenance personnel is intuitive, simple and quick; and, the utility model discloses simple structure, design benefit, installation make full use of compressor unit existing equipment facility, convenient to use, the dependable performance, measurement accuracy is high, and the error is very little.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a side view of embodiment 1 of the present invention;
the device comprises a rotor 1, a fixing clamp 2, a connecting piece 3, a current vortex displacement sensor 4, a detection point a-I, a detection point b-II, a detection point c-III, a detection point d-IV, a detection point e-V and a detection point f-VI.
Detailed Description
Example 1: when the concentricity of an equipment rotor and a cylinder body of a certain compressor is detected, a measuring tool of the center of a tile nest is used, the cylinder body needs to be opened, and the measuring tool is manufactured according to the size of an inner circle part with good surface condition at the two ends of the cylinder body. This instrument includes mounting fixture 2, connecting piece 3 and eddy current displacement sensor 4, and rotor 1 is as the rotation axis of tile nest center measurement, and mounting fixture 2 fixes on rotor 1, the practical staple bolt of mounting fixture in this embodiment. One end of the connecting piece is fixed on the hoop by using an M8-1 fastening bolt, and a 5mm eddy current displacement sensor 4 is fixed on the other end of the connecting piece 3, wherein an L-shaped rod is used as the connecting piece 3 in the embodiment. The eddy current displacement sensor 4 is arranged along the radial direction of the rotor 1, the parallelism of the eddy current displacement sensor 4 and the diameter of the rotor 1 is 0.3mm, and the angle deviation is not more than +/-12 degrees; the gap distance between the eddy current displacement sensor 4 and the inner circle of the cylinder body is 1.25mm, and the corresponding displacement value of the voltage value is 1mm/8v.
The eddy current displacement sensor 4 is connected with the DCS host machine by using a lead, the lead is fixed on the rotor, and the length of the lead is larger than the perimeter of the rotor. The data read by the eddy current displacement sensor 4 is transmitted to the DCS host, and distortion data in multi-point data are screened out through continuous trend data in actual work, so that the accuracy and precision of reading data are guaranteed.
During detection, the rotor rotates to drive the fixing clamp 2 and the eddy current displacement sensor 4 to rotate and perform reading, 3 groups of 6 data are read from the left side, the right side and the lower side, namely data of a first detection point a, data of a second detection point b, data of a third detection point c, data of a fourth detection point d, data of a fifth detection point e and data of a sixth detection point f, distortion data of each group are removed according to data trends, each group determines one datum and then serves as an operation datum, and the operation datum is a final datum basis for adjusting the tile pit during maintenance.
Claims (6)
1. A measuring tool of a tile nest center is installed on a rotor at the center of an inner circle of a compressor or a steam turbine cylinder body, and is characterized by comprising a fixing clamp, a connecting piece and an eddy current displacement sensor, wherein the rotor is used as a rotating shaft for measuring the tile nest center, the fixing clamp is fixed on the rotor, one end of the connecting piece is fixed on the fixing clamp, the eddy current displacement sensor is fixed on the other end of the connecting piece, the eddy current displacement sensor is arranged along the radial direction of the rotor, the diameter parallelism deviation of the eddy current displacement sensor and the rotor is not more than +/-0.5 mm, and the angle deviation is not more than +/-12 degrees; the eddy current displacement sensor is connected with the DCS host machine by using a lead, the lead is fixed on the rotor, and the length of the lead is larger than the perimeter of the rotor.
2. The measuring tool for the center of a tile cavity as claimed in claim 1, wherein the fixing clamp is a combination of a hoop and a screw, a combination of a clamping plate and a screw, or a magnetic base.
3. A tile socket center measuring tool as claimed in claim 1, wherein said connecting member is an L-shaped bar or bracket.
4. The measuring tool for the center of the tile socket as claimed in claim 1, wherein the fixing manner of the connecting member and the fixing jig is bolting or welding.
5. A dimple center measuring tool as claimed in claim 1 wherein said eddy current displacement sensor uses a 5mm eddy current displacement sensor.
6. A tile socket center measuring tool as claimed in claim 1, wherein the clearance between the eddy current displacement sensor and the inner circle of the cylinder is between 0.5mm and 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221359761.2U CN217687074U (en) | 2022-06-01 | 2022-06-01 | Measuring tool at center of tile pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221359761.2U CN217687074U (en) | 2022-06-01 | 2022-06-01 | Measuring tool at center of tile pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217687074U true CN217687074U (en) | 2022-10-28 |
Family
ID=83704921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221359761.2U Active CN217687074U (en) | 2022-06-01 | 2022-06-01 | Measuring tool at center of tile pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217687074U (en) |
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2022
- 2022-06-01 CN CN202221359761.2U patent/CN217687074U/en active Active
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