JP2011007246A - Structure for laying temperature sensor for rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability in disassembling/assembling of a support part for supporting a bearing.SOLUTION: The structure for laying a temperature sensor includes: the bearing 4 supporting a rotating shaft 2; a hollow-sleeve shaped support part 10 that supports the bearing 4 at the inner circumference and can be divided to an upper half part 10A and a lower half part 10B; an oil thrower 12 that is supported at the inner circumference of the support part 10 to surround the rotating shaft 2, can be divided to an upper half part 12A and a lower half part 12B, and prevents leakage of lubrication oil to the outside of the support part 10; and the temperature sensor 14 having a temperature detecting part 16 arranged to contact the bearing 4 and a conductor 18 led out of the temperature detecting part 16 to the outside of the support part 10. The conductor 18 of the temperature sensor 14 is routed between the upper half part 12A and the lower half part 12B of the oil thrower 12 to be led out to the outside of the support part 10.

Description

  The present invention relates to a temperature sensor laying structure for a rotary machine.

  Conventionally, in a rotating machine, it is necessary to install a temperature sensor in order to measure the temperature of the bearing in order to prevent overheating of the bearing that supports the rotating shaft.

  FIG. 1 is a diagram showing a conventional temperature sensor laying structure. As shown in FIG. 1, a bearing 52 that supports the rotating shaft 50 is fixed to an inner peripheral portion of a hollow cylindrical support portion 58 provided in the gear box 56. The bearing 52 shown in FIG. 1 is a tilting pad bearing. The bearing box 56 has an upper half 56A and a lower half 56B, and the upper half 56A is configured to be separable from the lower half 56B.

  In order to prevent leakage of the lubricating oil to the outside of the gear box 56, an oil drain 60 is provided inside the support portion 58 so as to partition the outside and the space where the bearing 52 is disposed. The oil drainer 60 is a disk-shaped component having a circular opening at the center through which the rotary shaft 50 passes.

  As shown in FIG. 1, a temperature sensor 62 that measures the temperature of the bearing 52 is provided. The temperature sensor 62 is a thermocouple, and a tip portion which is a detection portion 64 is embedded in the bearing 52 (bearing pad 54), and a lead wire 66 is provided in a support portion 58 between the bearing 52 and the oil drainer. It is pulled out to the outside of the gear box 56 through. The conducting wire 66 is fixed to the support portion 58 by a fitting 68.

  Although not showing the structure of the conventional example shown in FIG. 1, Patent Document 1 is an example of a document showing a configuration in which a temperature sensor is provided on a tilting pad bearing.

JP 2004-100729 A (paragraph 0034)

  In the conventional example shown in FIG. 1, when removing the upper half portion 56A of the gear box 56 for maintenance or the like, the wire 68 is restrained (tightened) by the fitting 68 so as not to break the wire 66 of the temperature sensor 62. ) To release the lead wire 66 from the gear box 56, and while pushing the lead wire 66 into the gear box 56, the upper half 56A of the gear box 56 is separated from the lower half 56B. Go. For this reason, careful work is required, and workability of disassembly and assembly is reduced.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a temperature sensor laying structure for a rotary machine that can improve the workability of disassembly / assembly of a structure (support) that supports a bearing. To do.

  In order to solve the above problems, a temperature sensor laying structure for a rotating machine according to the present invention includes a bearing that supports a rotating shaft, a hollow cylinder that supports a bearing at an inner peripheral portion and can be divided into an upper half and a lower half. It is supported on the inner periphery of the support part so as to surround the rotating shaft and can be divided into an upper half part and a lower half part to prevent leakage of lubricating oil to the outside of the support part An oil drainer, and a temperature sensor having a temperature detection unit disposed so as to be in contact with the bearing, and a conductor drawn from the temperature detection unit to the outside of the support unit, and the conductor of the temperature sensor includes: It is passed between the upper half part and the lower half part of the oil drainer, and is drawn out to the outside of the support part.

  According to the configuration of the present invention described above, the temperature sensor is not installed by penetrating the support portion, but the conductor of the temperature sensor is passed between the upper half and the lower half of the oil drainer. Since it is pulled out to the outside, it is possible to disassemble and assemble the upper half of the support part without affecting the conductor of the temperature sensor. Therefore, the workability at the time of disassembling / assembling the upper half of the support portion can be improved.

  Further, in the temperature sensor laying structure of the rotating machine described above, the sleeve includes a sleeve having a hollow portion for allowing the conducting wire of the temperature sensor to pass therethrough, and a fitting for fixing the conducting wire to the sleeve, The lower half is formed with a recess in which a part of the upper edge is cut out to fit the sleeve.

  According to the above configuration, the fitting is not fixed directly to the oil drain, but is fixed via the sleeve fitted into the recess in the lower half of the oil drain. For this reason, in disassembling / assembling the oil drain, it is possible to easily attach / separate the sleeve to / from the lower half of the oil drain. The upper half of the oil drainer can be attached and removed regardless of the sleeve. Therefore, workability at the time of disassembling and assembling the oil drainer can be improved.

  Further, in the temperature sensor laying structure of the rotary machine, a first groove and a second groove extending in a radial direction of the oil drain are formed on both sides of the recess on the upper surface of the lower half of the oil drain, and the sleeve A third groove communicating with the first groove and the second groove is formed on the upper surface of the first groove, and a seal member is provided in the first groove, the second groove, and the third groove.

  According to said structure, a sealing member improves by providing a sealing member in a 1st groove | channel, a 2nd groove | channel, and a 3rd groove | channel, and it can reduce oil leakage effectively.

  Further, in the temperature sensor laying structure of the rotating machine described above, the sleeve includes a sleeve having a hollow portion for allowing the conducting wire of the temperature sensor to pass therethrough, and a fitting for fixing the conducting wire to the sleeve, In the upper half portion, a recess is formed in which a part of the lower edge portion is cut out to fit the sleeve.

  According to the above configuration, the fitting is not directly fixed to the oil drain, but is fixed via the sleeve fitted into the recess in the upper half of the oil drain. For this reason, in disassembling / assembling the oil drainer, the sleeve can be easily attached to / separated from the upper half of the oil drainer. The lower half of the oil drainer can be attached to and detached from the lower half of the support portion regardless of the sleeve. Therefore, workability at the time of disassembling and assembling the oil drainer can be improved.

  In the temperature sensor laying structure of the rotary machine, a first groove and a second groove extending in a radial direction of the oil drain are formed on both sides of the recess in the upper half of the oil drain, and the lower surface of the sleeve A third groove communicating with the first groove and the second groove is formed, and a seal member is provided in the first groove, the second groove, and the third groove.

  According to said structure, a sealing member improves by providing a sealing member in a 1st groove | channel, a 2nd groove | channel, and a 3rd groove | channel, and it can reduce oil leakage effectively.

  In the temperature sensor laying structure of the rotary machine, the sleeve has a locking means for preventing axial movement with respect to the recess.

  According to said structure, it can prevent that a sleeve slips out from an oil drain.

  According to the temperature sensor laying structure of the rotating machine of the present invention, it is possible to improve the workability of disassembling / assembling of the support portion that supports the bearing.

It is a figure which shows the laying structure of the conventional temperature sensor. It is a figure which shows the temperature sensor installation structure of the rotary machine which concerns on 1st Embodiment of this invention. It is the III-III arrow line view of FIG. It is the IV-IV sectional view taken on the line of FIG. It is a perspective view which shows the structure of the lower half part of the sleeve and oil drain in the temperature sensor installation structure of the rotary machine which concerns on 1st Embodiment of this invention. It is a perspective view which shows the structure of the lower half part of the sleeve and oil drain in the temperature sensor laying structure of the rotary machine which concerns on the modification of 1st Embodiment of this invention. It is a figure which shows the temperature sensor installation structure of the rotary machine which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the structure of the upper half part of the sleeve and oil drain in the temperature sensor installation structure of the rotary machine which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the structure of the upper half part of the sleeve and oil drain in the temperature sensor laying structure of the rotary machine which concerns on the modification of 2nd Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

[First Embodiment]
FIG. 2 is a view showing a temperature sensor laying structure of the rotating machine according to the first embodiment of the present invention. 3 is a view taken in the direction of arrows III-III in FIG.
The rotary machine to which the temperature sensor laying structure of the present invention is applicable is, for example, a turbo compressor or a turbine.

As shown in FIG. 2, a bearing 4 that supports the rotating shaft 2 is fixed to an inner peripheral portion of a hollow cylindrical support portion 10 provided in the gear box 8. The bearing 4 in the configuration example shown in FIG. 2 is a tilting pad bearing, and has a bearing pad 6 on the inner periphery. However, the bearing 4 is not limited to the tilting pad bearing, and may be other sliding bearings or rolling bearings.
Lubricating oil is supplied to the bearing 4 by lubricating oil supply means (not shown).

  When the rotary machine is a turbo compressor or a turbine, a compressor impeller or a turbine impeller is connected to the outer side of the gear box 8 of the rotary shaft 2.

  As shown in FIGS. 2 and 3, the gear box 8 has an upper half 8A and a lower half 8B, and the upper half 8A is separable from the lower half 8B. The upper half part 8A and the lower half part 8B are fastened by fastening means such as a bolt (not shown) and are fixed to each other. At the time of maintenance, the fastening is released and the upper half 8A is separated from the lower half 8B, so that the inside of the gear box 8 is opened, and the bearing 4 and the oil drainer 12 can be disassembled and assembled.

  The support portion 10 in the configuration example shown in FIGS. 2 and 3 has a form protruding from the outer surface of the gear box 8 in the axial direction of the rotary shaft 2, and a part of the upper half portion 8 </ b> A of the gear box 8. And a lower half 10B formed as a part of the lower half 8B of the gear box 8.

  In order to prevent the lubricating oil from leaking to the outside of the gear box 8, an oil drain 12 is provided inside the support portion 10 so as to partition the outside and the space in which the bearing 4 is disposed. The oil drainer 12 is a disk-shaped component having a circular opening at the center for passing the rotating shaft 2, and a plurality of fins 12 c are provided on the inner peripheral portion at intervals in the axial direction.

The oil drain 12 has an upper and lower divided structure composed of an upper half 12A and a lower half 12B, and is configured such that the upper half 12A and the lower half 12B can be separated when the gear box 8 is disassembled.
A protrusion 12 d extending in the circumferential direction is provided on the outer peripheral surface of the oil drainer 12, and the protrusion 12 d is fitted into the annular groove 11 provided in the inner periphery of the support 10, so that the axial direction relative to the support 10 is The movement is constrained.

  In order to measure the temperature of the bearing 4, a temperature sensor 14 is provided. As this temperature sensor 14, a thermocouple, a resistance temperature detector, etc. can be used, for example.

  4 is a cross-sectional view taken along line IV-IV in FIG. As shown in FIG. 4, the temperature sensor 14 is drawn out from the temperature detection unit 16 disposed so as to contact the bearing 4 (the bearing pad 6 in the illustrated example) to the outside of the support unit 10. A conductor 18. When the temperature sensor 14 is a thermocouple, the temperature detector 16 is a temperature measuring contact, and when the temperature sensor 14 is a resistance temperature detector, the temperature detector 16 is a resistance element.

As shown in FIGS. 2 and 4, the conductor 18 of the temperature sensor 14 is drawn between the upper half 12 </ b> A and the lower half 12 </ b> B of the oil drain 12 and pulled out to the outside of the support 10.
The temperature sensor laying structure of the first embodiment further includes a sleeve 28 having a hollow portion 30 for passing the conducting wire 18 of the temperature sensor 14 and a fitting 20 for fixing the conducting wire 18 to the sleeve 28. Yes.

FIG. 5 is a perspective view showing the configuration of the sleeve 28 and the lower half 12B of the oil drainer 12 in the first embodiment of the present invention.
As shown in FIGS. 4 and 5, the lower half portion 12 </ b> B of the oil drain 12 is formed with a recess 26 in which a part of the upper edge portion is notched and the sleeve 28 is fitted. The recess 26 extends in the axial direction and communicates one surface and the other surface of the lower half 12B.

The upper surface 28a of the sleeve 28 is formed into a flat surface, and forms a dividing surface between the upper half 12A and the upper surface 12b of the lower half 12B of the oil drain 12.
The sleeve 28 has flanges 32 and 34 at both ends as locking means for preventing axial movement with respect to the recess 26. In a state where the sleeve 28 is fitted in the recess 26, the two flange portions 32 and 34 engage with one surface and the other surface of the lower half portion 12B of the oil drain 12, respectively. Restrained in the axial direction.

  Note that the locking means for preventing the axial movement of the sleeve 28 with respect to the lower half 12B is not limited to the configuration in which the flanges 32 and 34 are provided at both ends of the sleeve 28. For example, a groove is provided in the middle of the concave portion 26 in the axial direction, and a protrusion that fits in the groove is provided in the middle portion of the sleeve 28 in the axial direction. It is good also as a structure which prevents the movement of the axial direction of the sleeve 28 by combining.

  A seal member 35 is provided between the upper half 12A and the lower half 12B of the oil drain 12. As the seal member 35, for example, a paste-like sealant applied and solidified or an elastic seal member can be used.

  The fitting 20 in the configuration example shown in FIG. 4 is a compression fitting 20, and includes a hollow main body 22 that is screwed to the sleeve 28 on the outside of the support portion 10, and a hollow adjustment bolt 24 that is screwed to the main body 22. Have The conducting wire 18 is passed through the hollow portion of the main body 22 and the adjusting bolt 24. By loosening the adjusting bolt 24, the insertion amount of the conducting wire 18 to the bearing 4 side can be adjusted, and by tightening the adjusting bolt 24, the conducting wire 18 Is fixed.

  According to the configuration of the first embodiment described above, the temperature sensor is not installed by penetrating the support portion, but the conductor 18 of the temperature sensor 14 is between the upper half 12A and the lower half 12B of the oil drain 12. The upper part 10A (8A) of the support part 10 (gear box 8) can be disassembled and assembled without affecting the conducting wire 18 of the temperature sensor 14 because it is drawn out to the outside of the support part 10. can do. Therefore, the workability at the time of disassembling / assembling the upper half portion 10A (8A) of the support portion 10 (gear box 8) can be improved.

Further, according to the configuration of the first embodiment, the fitting 20 is not directly fixed to the oil drain 12 but is fixed via the sleeve 28 that fits into the recess 26 of the lower half 12B of the oil drain 12.
For this reason, in the disassembling / assembling of the oil drainer, the sleeve 28 can be easily mounted / separated from the lower half 12B of the oil drainer 12. The upper half 12 </ b> A of the oil drainer 12 can be attached and detached regardless of the sleeve 28. Therefore, workability at the time of disassembling / assembling the oil drainer 12 can be improved.

[Modification of First Embodiment]
FIG. 6 is a perspective view showing the configuration of the sleeve 28 and the lower half 12B of the oil drainer 12 in a modification of the first embodiment of the present invention.
On the upper surface 12b of the lower half 12B of the oil drain 12, first and second grooves 36 and 37 extending in the radial direction of the oil drain 12 (arrow R direction in the drawing) are formed on both sides of the recess 26.
A third groove 38 communicating with the first groove 36 and the second groove 37 is formed on the upper surface 28 a of the sleeve 28. The third groove 38 in the illustrated example extends in the radial direction of the oil drain 12, similarly to the first groove 36 and the second groove 37.

  A seal member 35 is provided in the first groove 36, the second groove 37, and the third groove 38. As a form of the sealing member 35, the first groove 36, the second groove 37, and the third groove 38 may be filled with a paste-like sealing agent, or the first groove 36, the second groove 37, and the first groove 36 may be provided. An elastic seal member fitted into the three grooves 38 may be used.

  According to such a modification of the first embodiment, the sealing member 35 is provided in the first groove 36, the second groove 37, and the third groove 38, thereby improving the sealing performance and effectively preventing oil leakage. Can be reduced.

[Second Embodiment]
FIG. 7 is a view showing a temperature sensor laying structure according to the second embodiment of the present invention. FIG. 8 is a perspective view showing the configuration of the sleeve 28 and the upper half 12A of the oil drain 12 in the second embodiment.
In the first embodiment described above, the configuration in which the sleeve 28 is fitted in the recess 26 provided in the lower half 12B of the oil drain 12 is adopted. However, in the second embodiment, the recess provided in the upper half 12A of the oil drain 12 A configuration is adopted in which the sleeve 28 is fitted to 26a.

  That is, in the second embodiment, the upper half 12A of the oil drain 12 is formed with a recess 26a in which a part of the lower edge is cut out and the sleeve 28 is fitted. The recess 26a extends in the axial direction and communicates one surface and the other surface of the upper half 12A.

The lower surface 28b of the sleeve 28 is formed into a flat surface, and forms a split surface between the lower half 12B and the lower surface 12a of the upper half 12A of the oil drain 12.
The sleeve 28 has flanges 32 and 34 at both ends as locking means for preventing axial movement with respect to the recess 26. In the state where the sleeve 28 is fitted in the recess 26, the two flange portions 32, 34 engage with one surface and the other surface of the upper half portion 12A of the oil drain 12, respectively, so that the sleeve 28 is in relation to the upper half portion 12A. Restrained in the axial direction.

  The locking means for preventing the axial movement of the sleeve 28 with respect to the upper half 12 </ b> A is not limited to the configuration in which the flanges 32 and 34 are provided at both ends of the sleeve 28. For example, a groove is provided in the middle of the recess 26a in the axial direction, and a projection that fits in the groove is provided in the middle of the sleeve 28 in the axial direction. When the sleeve 28 is fitted in the recess 26a, the projection and the groove are engaged. It is good also as a structure which prevents the movement of the axial direction of the sleeve 28 by combining.

  The structure of the other part of 2nd Embodiment is the same as 1st Embodiment.

  According to the configuration of the second embodiment described above, the temperature sensor is not installed by penetrating the support portion, but the conductor 18 of the temperature sensor 14 is between the upper half 12A and the lower half 12B of the oil drain 12. The upper part 10A (8A) of the support part 10 (gear box 8) can be disassembled and assembled without affecting the conducting wire 18 of the temperature sensor 14 because it is drawn out to the outside of the support part 10. can do. Therefore, the workability at the time of disassembling / assembling the upper half portion (8A) of the support portion 10 (gear box 8) can be improved.

Further, according to the configuration of the second embodiment, the fitting 20 is not directly fixed to the oil drain 12 but is fixed via the sleeve 28 that fits into the recess 26 a of the upper half 12 </ b> A of the oil drain 12.
For this reason, in disassembling / assembling the oil drainer 12, the sleeve 28 can be easily mounted / separated from the upper half 12A of the oil drainer 12. The lower half 12B of the oil drain 12 can be attached to and detached from the lower half 10B of the support portion 10 independently of the sleeve 28. Therefore, workability at the time of disassembling / assembling the oil drainer 12 can be improved.

[Modification of Second Embodiment]
FIG. 9 is a perspective view showing the configuration of the sleeve 28 and the lower half 12B of the oil drainer 12 in a modification of the second embodiment of the present invention.
On the lower surface 12a of the upper half 12A of the oil drain 12, a first groove 36a and a second groove 37a extending in the radial direction of the oil drain 12 (in the direction of arrow R in the figure) are formed on both sides of the recess 26a.
On the lower surface 28b of the sleeve 28, a third groove 38a communicating with the first groove 36a and the second groove 37a is formed. The third groove 38a in the illustrated example extends in the radial direction of the oil drain 12 similarly to the first groove 36a and the second groove 37a.

  Seal members 35 are provided in the first groove 36a, the second groove 37a, and the third groove 38a. As a form of the sealing member 35, the first groove 36, the second groove 37, and the third groove 38 may be filled with a paste-like sealing agent, or the first groove 36, the second groove 37, and the first groove 36 may be provided. An elastic seal member fitted into the three grooves 38 may be used.

  According to such a modification of the second embodiment, the sealing member 35 is provided in the first groove 36a, the second groove 37a, and the third groove 38a, thereby improving the sealing performance and effectively preventing oil leakage. Can be reduced.

  Although the embodiments of the present invention have been described above, the embodiments of the present invention disclosed above are merely examples, and the scope of the present invention is not limited to these embodiments. . The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

2 Rotating shaft 4 Bearing 8 Gear box 10 Support part 10A Upper half part 10B of support part Lower half part 12 of support part Oil drain 12A Upper half part 12B of oil drain Lower part 14 of oil drain 14 Temperature sensor 16 Detection part 18 Conductor 20 Fitting 26, 26a Recess 28 Sleeve 30 Hollow 35 Seal member 36, 36a First groove 37, 37a Second groove 38, 38a Third groove

Claims (6)

A bearing that supports the rotating shaft;
A hollow cylindrical support that supports the bearing at the inner periphery and can be divided into an upper half and a lower half,
An oil drainer that is supported by the inner peripheral portion of the support portion so as to surround the rotation shaft, can be divided into an upper half portion and a lower half portion, and prevents leakage of lubricating oil to the outside of the support portion;
A temperature sensor having a temperature detection unit disposed so as to contact the bearing and a lead wire drawn from the temperature detection unit to the outside of the support unit;
A temperature sensor laying structure for a rotary machine, wherein the lead wire of the temperature sensor is passed between an upper half portion and a lower half portion of the oil drainer and pulled out to the outside of the support portion. A sleeve having a hollow portion for passing a conductor of the temperature sensor;
A fitting for fixing the conducting wire to the sleeve;
The temperature sensor laying structure for a rotary machine according to claim 1, wherein a part of an upper edge portion of the lower part of the oil drainer is notched and a recess into which the sleeve is fitted is formed. A first groove and a second groove extending in a radial direction of the oil drain are formed on both sides of the recess on the upper surface of the lower half of the oil drain,
A third groove communicating with the first groove and the second groove is formed on the upper surface of the sleeve,
The temperature sensor laying structure for a rotary machine according to claim 2, wherein seal members are provided in the first groove, the second groove, and the third groove. A sleeve having a hollow portion for passing a conductor of the temperature sensor;
A fitting for fixing the conducting wire to the sleeve;
The temperature sensor laying structure for a rotary machine according to claim 1, wherein a concave portion into which a part of the lower edge portion is cut out and the sleeve is fitted is formed in the upper half portion of the oil drain. A first groove and a second groove extending in the radial direction of the oil drain are formed on both sides of the recess in the upper half of the oil drain,
A third groove communicating with the first groove and the second groove is formed on the lower surface of the sleeve,
The temperature sensor installation structure of the rotary machine of Claim 4 with which the sealing member is provided in the said 1st groove | channel, the said 2nd groove | channel, and the said 3rd groove | channel.   The temperature sensor laying structure according to claim 2 or 4, wherein the sleeve has a locking means for preventing axial movement with respect to the recess.

Images