JP2015127578A - Bearing oil supply device and ventilator including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing oil supply device which applies a lubrication oil according to the degree of deterioration of lubrication oil used positions and improves the life of the lubrication oil, and to provide a ventilator including the bearing oil supply device.SOLUTION: A bearing oil supply device comprises: a lubrication oil tank 32 in which a lubrication oil 31 from bearings of a first stage rotor blade 23, a second stage rotor blade 24, and a motor 14 is circulated and stored; a first division part 33A and a second division part 33B which divide an inner space of the lubrication oil tank 32 into multiple sections (two sections in one embodiment); and a first oil tank 34A, a second oil tank 34B, and a third oil tank 34C which are divided by the division parts 33A, 33B.

Description

  The present invention relates to a bearing oil supply device for lubricating oil used for a bearing such as an axial fan and a ventilator including the same.

  Large axial fans are used as, for example, ventilators (for example, induction fans) in thermal power plants, and these are suitable for increasing the capacity of boilers and are often used because they consume less power at partial loads. Has been. A bearing oil supply device that circulates and reuses lubricating oil is used for the bearing portion of this axial fan (Patent Document 1).

Japanese Patent Laid-Open No. 11-324997

  By the way, since the conventional bearing oil supply apparatus employs a circulation system for circulating the lubricating oil, the lubricating oil is deteriorated with use. The deteriorated lubricating oil is collected in the oil tank. Usually, it is operated by renewal of oil (oil renewal) every 2 to 3 years, and flushing to remove floating rust attachments and residual foreign matters.

  In addition, depending on the usage conditions and environment, the lubricating function may be significantly reduced due to oxidation, deterioration, wear and rusting of sliding parts, and contamination of dust, resulting in vibration of the axial fan and reduced ventilation capacity. Will be. In addition, it is difficult to confirm the non-conforming position in order to identify the problem location of the lubricating oil system.

  In addition, the amount of lubricating oil discarded for replacement or flushing when the lubricating oil is deteriorated or contaminated (a few tons for a large axial fan, several tons) and operating time Is a big challenge. There is also a problem that the disposal cost of discarded oil is high. Moreover, even when flushing, it may deteriorate early due to the effect of residual oil, and an increase in the number of flushing times and waste oil discharge cannot be avoided.

  Therefore, the appearance of a bearing oil supply device that can apply the lubricating oil according to the degree of deterioration at the location where the lubricating oil is used and can improve the life of the lubricating oil is eagerly desired.

  In view of the above problems, the present invention provides a bearing oil supply device that can apply a lubricating oil according to the degree of deterioration at a location where the lubricating oil is used and can improve the life of the lubricating oil, and a ventilator equipped with the same. The issue is to provide.

  The first invention of the present invention for solving the above-mentioned problem is to divide and divide the inside of the lubricating oil tank into a plurality of sections, and a lubricating oil tank that circulates and stores the lubricating oil from the rotor blade and motor bearings. The bearing oil supply device is characterized in that the oil of the system is divided and supplied for each partition portion and the oil tank divided by each partition portion.

  According to a second aspect of the present invention, in the first aspect of the invention, there is provided a bearing oil supply device including a communication pipe that communicates between the partition portions.

  A third invention is the bearing oil supply device according to the first or second invention, further comprising an oil water condensing device having a cooling part in the middle of the return oil line from the system.

  According to a fourth invention, in any one of the first to third inventions, a dehumidifying device is provided in the middle of a sealing air supply line for sealing the space in which the moving blade is contained. It is in the bearing oil supply device.

  According to a fifth aspect of the present invention, there is provided a ventilator including an axial fan and the bearing oil supply device according to any one of the first to fourth aspects.

  According to the present invention, since the oil tank is partitioned by the partition portion, the application destination of the lubricating oil of the system is fixed, so that it is easy to specify at the time of, for example, oxidation, moisture mixing, rusting in each oil supply system Become.

FIG. 1 is a schematic view of an axial fan including a bearing oil supply device according to the first embodiment. FIG. 2 is a schematic view of an axial fan including the bearing oil supply device according to the second embodiment. FIG. 3 is a schematic view of an axial fan including a bearing oil supply device according to the third embodiment. FIG. 4 is a schematic view of an axial fan including a bearing oil supply device according to the fourth embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

FIG. 1 is a schematic view of an axial fan including a bearing oil supply device according to the first embodiment.
As shown in FIG. 1, an induction blower 11 which is a bearing fan constituting a blower applied to a bearing oil supply device according to the present embodiment has an inner cylinder 13 attached at a predetermined interval in a cylindrical outer cylinder 12. A motor 14 is attached to the proximal end portion of the outer cylinder 12. A first main shaft 17 and a second main shaft 19 are fixed to the drive shaft 15 of the motor 14 via an intermediate shaft 16 and the like, enter the central portion of the inner cylinder 13, and the first main shaft 17 is a first stage bearing 21. The second main shaft is rotatably supported by the second stage bearing 22.
A first stage moving blade 23 is mounted on the first main shaft 17, and a second stage moving blade 24 is mounted on the second main shaft 19.

  When the drive shaft 15 of the motor 14 is driven and rotated, the first main shaft 18 and the second main shaft 19 are rotationally driven through the intermediate shaft 16 and the like, and the outer cylinder is driven by the first stage moving blade 23 and the second stage moving blade 24. The air is sucked in from the inlet side of 12, compressed inside, and discharged from a discharge side (left side in the figure) (not shown). In addition, you may make it provide a stationary blade as needed.

  Here, as the blower, in addition to the induction blower as in the present embodiment, for example, a gas recirculation fan, a forced blower, and the like can be exemplified, but the present invention is not limited to these.

  In the bearing oil supply apparatus 10A of the present embodiment, a lubricating oil tank 32 that circulates and stores lubricating oil 31 from the bearings of the first stage moving blade 23, the second stage moving blade 24, the motor 14, and the like, and this lubricating oil tank The first partition part 33A and the second partition part 33B that divide the inside 32 into a plurality of sections (two sections in this example), the first oil tank 34A and the second oil tank partitioned by the partition parts 33A and 33B 34B and the third oil tank 34C.

The first oil reservoir 34A is to the second stage bearing 22 of the second stage blade 24, with the first lubricating oil supply line L _1, with delivering the lubricating oil 31, returns the first lubricating oil line the L ₂ back to store lubricant.

The second oil tank 34B is the first stage bearing 21 of the first stage blade 23, with the second lubricating oil supply line L _11, together with the feed Kyusuru to suck lubricating oil 31 in pump P, the second lubricating oil return line L ₁₂ returns to store lubricant.

The third oil tank 34C is to stage the bearings 14a and oil pump 14b of the motor 14, by using the third lubricating oil supply line L _21, together with the feed Kyusuru to suck lubricating oil 31 in the pump P, the third to store lubricant return the lubricating oil return line L _22.
Each first lubricating oil supply line L ₁ , second lubricating oil supply line L ₁₁ , and third lubricating oil supply line L ₂₁ is provided with a filter 41 to remove foreign matter such as rust and dust. Yes. Note that the second lubricating oil supply line L _11, the oil cooler 42 is interposed, and lubricating oil so as to feed in a cold state. In FIG. 1, P is a lubricating oil pump, M is a motor for driving the lubricating oil pump, 32a is a level meter of the lubricating oil tank, 32b is an oil supply port, 32c is an air breather, 32d is an intake strainer, and 32e is a drain valve. Each is illustrated.

  According to the present embodiment, the first oil tank 34A, the second oil tank 34B, and the third oil tank 34C divided by the partition portions 33A and 33B are partitioned, and the application destination of the system lubricant is fixed. Therefore, it becomes easy to identify, for example, oxidation, moisture mixing, and rusting in each oil supply system.

  Therefore, compared to the case where all the lubricating oil is returned to one oil tank without being divided by the partition as in the conventional case, the lubricating oil of the deteriorated system and the lubricating oil of the still healthy system are not. There will be no deterioration due to mixing.

  Further, it becomes possible to perform oil replenishment and flushing according to the system of the deteriorated lubricating oil, and the amount of waste oil to be discarded is smaller than in the past.

  In addition, the deterioration of the lubricating oil can be monitored by visual observation or sampling oil deterioration test (water content in oil, kinematic viscosity, oxidation stability, contamination degree (NAS grade), appearance (hue), etc.). However, the present invention is not limited to this.

FIG. 2 is a schematic view of an axial fan including the bearing oil supply device according to the second embodiment. In addition, about the member which overlaps with the member of Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.
The bearing oil supply apparatus 10B according to the present embodiment is further divided in the first embodiment by three first communication pipes 51A, second communication pipes 51B, and third communication pipes 51C that communicate the partition portions 33A and 33B. The first oil tank 34A, the second oil tank 34B, and the third oil tank 34C can be moved relative to each other. In the drawing, symbols V ₁ and V ₂ indicate valves at the time of communication.

  Thereby, by sharing the lubricating oil 31 of the first to third oil tanks 34A to 34C divided into lines, for example, the stop of the blower due to vibration in the system due to the rapid deterioration of the lubricating oil 31 or the like in advance. It can be avoided.

  Therefore, according to the degree of deterioration of the lubricating oil stored in the systematically divided first to third oil tanks 34A to 34C, the accident of stopping the blower is made in advance by communicating with the oil tank that has deteriorated rapidly. It will be avoided.

FIG. 3 is a schematic view of an axial fan including a bearing oil supply device according to the third embodiment. In addition, about the member which overlaps with the member of Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.
The bearing oil supply device 10C according to the present embodiment is the same as the second embodiment except that the first lubricating oil return line L ₂ , the second lubricating oil return line L ₁₂ , and the third lubricating oil return line L ₂₂ are further provided with a cooling unit 63. The first to third oil water condensing devices 61 </ b> A to 61 </ b> C are provided, respectively, and the water in the lubricating oil 31 that passes therethrough is condensed by the cooling unit 63 using the cooling water CW provided in the condensing unit 62. Removes moisture from the lubricating oil. In the figure, reference numeral 65 denotes condensed water, and V ₁₁ denotes a valve.

According to this embodiment, in each of the bearings 21, 22 and 14a, the water-in-oil emulsion lubricating oil having hydrophilicity subjected to thermal deterioration, oxidation deterioration and hydrolysis at the friction surface and the sliding portion is provided. Trapping is performed in the middle of the recovery path to prevent moisture from being brought into the first to third oil tanks 34A to 34C. Accordingly, it is possible to extend the life of the lubricating oil 31 that is circulated and used for each system.
In addition, although a present Example is set as the Example which applied the 1st-3rd oil water condensing apparatus 61A-61C in Example 2, you may apply similarly also in Example 1. FIG.

FIG. 4 is a schematic view of an axial fan including a bearing oil supply device according to the fourth embodiment. In addition, about the member which overlaps with the member of Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.
Bearing lubrication device 10D according to this embodiment, in the third embodiment, in the middle of the air supply line L ₃₁ of the air 71 for sealing to seal the inside space of the inner cylinder 13, a dehumidifier 72 for cooling the cooling water CW I have. In the figure, reference numeral 73 is sealed air introducing fan 74 damper, V ₁₂ illustrates the valve.

In the present embodiment, a dehumidifying cylinder 75 containing a dehumidifying agent, for example, is interposed in the air supply line L ₃₁ along with the dehumidifying device 72. Here, examples of the dehumidifying agent include aluminum oxide (Al ₂ O ₃ ).

According to the present embodiment, when air for air sealing is introduced from the atmosphere, moisture in the air 71 can be removed by the dehumidifying device 72 and the dehumidifying cylinder 75 and lubrication of drain water generated when compressed. It is possible to prevent degradation due to hydrolysis and decrease in emulsification due to mixing in the oil 31.
In addition, although a present Example is set as the Example which applied the dehumidification apparatus 72 in Example 3, you may apply similarly in Example 1 or 2. FIG.

10A to 10D Bearing oil supply device 31 Lubricating oil 32 Lubricating oil tank 33A First partition 33B Second partition 34A to 34C First to third oil tanks 51A to 51C First to third communication pipes 61A to 61C First to third 3-oil water condensing device 72 Dehumidifier

Claims (5)

A lubricating oil tank that circulates and stores lubricating oil from the rotor blade and motor bearings;
A partition section for dividing the inside of the lubricating oil tank into a plurality of sections;
A bearing oil supply device, wherein the oil in the system is divided and supplied for each oil tank divided by each partition. In claim 1,
A bearing oil supply device comprising a communication pipe communicating between the partition portions. In claim 1 or 2,
A bearing oil supply device comprising an oil water condensing device having a cooling part in the middle of a return oil line from the system. In any one of Claims 1 thru | or 3,
A bearing oil supply apparatus comprising a dehumidifier in the middle of a sealing air supply line that seals a space in which the moving blade is contained. An axial fan,
A ventilator comprising the bearing oil supply device according to any one of claims 1 to 4.

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