JP2002227855A - Bearing protector for rotary machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely interrupt air including dust and fine foreign matter under an inferior environment around the outside of a bearing with the inside of a bearing oil tank, so as to prevent infiltration of the outside foreign matter into a bearing slide surface. SOLUTION: A hold plate is integrally provided in an inner end side of a bearing cover to additionally have a cutout stepped part in a rotary shaft side, the cutout stepped part of the hold plate arranges one or a plurality of hair collector units consisting of resin system material formed in circular annular shape divided in one ring or in a plurality in a circumferential direction to be clamped to a metal or non-metal-made hair collector unit clamp with dimensional accuracy determined so as to generate an internal diametric side end thereof almost equal to or several mm smaller than a shaft and a bearing clearance, and a retainer plate provided so as to retain this hair collector unit is constituted by fixing it by a fixing metal fitting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing protection device provided with a bearing cover for a rotating machine or the like, and a brush dust intrusion prevention device for preventing the brush dust of the rotating electric machine from entering the machine.

[0002]

2. Description of the Related Art In a rotating machine, a sliding bearing or a thrust bearing existing in a bearing device forms a rotating fluid lubricating oil film on a bearing sliding surface in order to support a bearing load, and slides by a sliding surface friction coefficient. Alleviates kinetic friction heat and heat caused by stirring. For this reason, lubricating oil is contained in a bearing cover provided on the left or right or one side of the bearing as an oil tank, or lubricating oil is fed into the oil tank using a circulation pump or the like.

[0003] In a bearing oil bath of a rotating machine, a slip surface oil film is formed by the slip surface motion of the bearing, and the friction coefficient of the bearing slip surface becomes so small as to be inferior to solid friction.

As described above, it is necessary for the sliding bearing to maintain a fluid lubricating state in which an oil film of an appropriate tens of microns to several hundreds of microns is formed, and once a minute foreign matter equivalent to the oil film thickness is once formed on the bearing sliding surface. If the bearing enters, the sliding bearing will be burnt. If the bearing becomes fatal, the rotary machine must be stopped and restored, resulting in enormous damage.

[0005] Therefore, prevention of minute foreign matter from entering the lubricating oil in the bearing oil tank is extremely important for bearing management.
Recently, the analysis and control of bearing lubricating oil has been strictly applied as a bearing diagnosis technology for weight contamination of foreign matter in oil of lubricating oil, weight contamination degree of foreign matter in oil, NAS standards, and the severity of wear caused by "metal wear particles" in oil. It has been implemented.

Therefore, in general, a so-called labyrinth seal bearing cover is also used as a partition between the bearing oil tank and the outside, which also serves to prevent oil vapor generated in the bearing oil tank from being discharged out of the oil tank.

FIG. 5 shows a configuration of a conventional bearing protection device for a horizontal shaft type rotary machine.

In FIG. 5A, reference numeral 1 denotes a rotating shaft of a horizontal shaft type rotating machine, to which a load such as a weight of a rotating portion of the rotating machine or a thrust generated from a directly connected prime mover is applied. It is. Reference numeral 35 denotes a slide bearing for supporting such a rotating shaft 1.
6 is supported. Further, the sliding bearing 35 is
Bearing cover 1 whose top opening is closed by bearing lid 37
7 and is immersed in lubricating oil in an oil tank 16 located inside.

As shown in FIG. 5 (b), a plurality of aluminum teeth 20 are disposed concentrically with the rotating shaft 1 at appropriate intervals in the axial direction at the X portion shown on the atmosphere side of the bearing cover 17. An annular ring 19 that has been planted is mounted by welding or the like.

In this case, the aluminum teeth 20 are uniformly disposed on the rotating shaft 1.
Are set concentrically with the rotating shaft so that an appropriate gap 22 is maintained between the sliding surface 25 and the sliding surface 25.

FIG. 6 shows the structure of a conventional bearing protection device for a vertical rotating machine.

In FIG. 6A, reference numeral 1 denotes a rotating shaft of a vertical rotating electric machine. The rotating shaft 1 is supported by a guide bearing (or thrust bearing) 41 supported by a guide bearing support 43. This guide bearing (or thrust bearing) 41
Is covered by a bearing cover 17 and is immersed in lubricating oil in an oil tank 16 located inside the bearing cover 17.

Reference numeral 42 denotes a bearing housing, 44 denotes a lower oil tank, 45 denotes an oil cylinder, 46 denotes an oil drain, and 47 denotes a seal ring. These are components of the bearing device.

As shown in FIG. 6 (b), a plurality of aluminum teeth 20 are arranged on the upper part (Y part in the drawing) of the bearing cover 17 concentrically with the rotating shaft 1 at appropriate intervals in the axial direction. An annular ring 19 that has been planted is mounted by welding or the like.

The annular ring 19 has an annular chamber 12 formed at a portion corresponding to an axial intermediate region, and has a pressure higher than the pressure in the oil tank through an intermediate air hole 21 provided in communication with the annular chamber 12. By supplying air with pressure to the high pressure region A, leakage of oil vapor in the bearing oil tank 16 is prevented, and fine foreign substances contained in the atmosphere outside the oil tank are prevented from entering the oil tank.

On the other hand, a small gap 22 facing the rotating shaft 1 is provided below the bearing oil tank (part Z in the drawing) as a seal against the atmosphere outside the bearing as shown in FIG. 6C. The seal ring 47 prevents minute foreign substances contained in the outside atmosphere from entering.

In this case, the aluminum teeth 20 are uniformly disposed on the rotating shaft 1.
Are set concentrically with the rotating shaft so that an appropriate gap 22 is maintained between the sliding surface 25 and the sliding surface 25.

FIG. 7 shows a configuration of a brush powder intrusion prevention device for preventing the intrusion of brush powder into the machine in a conventional vertical shaft type rotating electric machine.

In FIG. 7, reference numeral 27 denotes a slip ring shaft for transmitting and receiving an exciting current of the vertical rotating electric machine. A slip ring 28 is attached to a support extending horizontally from the slip ring shaft 27. Reference numeral 29 denotes a current collecting brush that contacts the slip ring 28 and collects current. The current collecting brush 29 is held by a brush holder 30 supported by a brush holder support 31.

Reference numeral 26 denotes a slip ring shaft 27 located below the slip ring 28 and the current collecting brush 29.
A partition plate provided to face the convex portion 27a having
An appropriate gap 34 exists between the partition plate 26 and the rotating slip ring projection 27a to avoid contact.

[0021]

However, in a bearing protection device having a conventional structure as shown in FIGS.
Even if the inner diameter of the rotary member is maintained at an appropriate gap 22 with the sliding surface 25 during the assembly, if the rotating portion is displaced by the secondary element during actual operation, this relationship may not be maintained.

For this reason, in a poor environment outside the bearing, dust and minute foreign matter entering the atmosphere cannot pass through this gap due to long-term operation and cannot enter the bearing oil tank. Always physically does not allow
A bearing seal structure capable of maintaining a zero seal gap was required.

In particular, in the bearing protection device having the conventional structure, in the case of poor atmospheric environmental conditions outside the bearing at the time of stoppage, the presence of the seal gap prevents dust and minute foreign matters outside the bearing from entering the bearing oil tank. Did not.

On the other hand, in the conventional vertical shaft type rotating electric machine as shown in FIG. 7, a brush powder intrusion prevention device provided at a portion for transmitting and receiving an exciting current is partitioned so as to face the convex portion 27a of the slip ring shaft 27. Although the plate 26 is provided, the gap between the sealing portion of the projection 27a on the rotating side and the sealing portion of the partition plate 26 on the stationary side cannot be made zero.

For this reason, the brush powder 32 floating in the space 33 in the slip ring housing from the seal gap 34 enters the rotor side inside the rotating electric machine, and eventually scatters throughout the rotating electric machine.

The brush powder 32 scattered to the rotor side is
It adheres to the excitation conductor and the like provided on the rotor, and has an adverse effect such as a decrease in insulation resistance of the excitation circuit. In addition, there has been a problem in that each part inside the rotating electric machine is contaminated with the brush powder 32 due to ventilation that spreads inside the rotating electric machine due to long-term operation.

[0027] The present invention has been made in view of the above-described circumstances, and it has been proposed that the outside and the gap from the gap where the bearing cover exists are provided.
It is an object of the present invention to provide a bearing protection device that can completely prevent foreign matter from entering the atmosphere and a brush powder intrusion prevention device that can prevent intrusion of rotary electric machine brush powder into the machine.

[0028]

In order to achieve the above object, the present invention provides a bearing protection device for a rotary machine and an excitation current in a rotary electric machine in any operation state including a stop state by the following means. And a device for preventing the intrusion of the brush powder generated from the portion where the brush powder flows into the machine.

The invention corresponding to claim 1 is different from the bearing cover of a bearing device in which lubricating oil is contained in a bearing cover installed on the left or right or one side of a bearing for supporting a rotating shaft of a horizontal shaft type rotating machine. Located inside the bearing cover, which is under pressure, to partition the external communication part, shuts off the air containing dust and minute foreign matter around the outside of the bearing and the inside of the bearing oil tank, and prevents the above foreign matter from entering the bearing sliding surface In the bearing protection device described above, a metal or non-metal hair collecting body clamp is held by the notch step of the holding plate integrally provided on the inner end side of the bearing cover and having a notch step on the rotating shaft side. Let me
One or a plurality of hair collecting bodies made of a resin-based material formed in an annular shape and divided into a single ring or a plurality of rings in a circumferential direction, the inner diameter side end of which is substantially the same as the bearing clearance with respect to the rotating shaft. Alternatively, the dimensional accuracy is determined so as to be smaller by several mm, and the diametrical arrangement is performed in the axial direction, and a pressing plate provided to press the hair collecting body is fixed to the holding plate by a fixing bracket.

According to a second aspect of the present invention, in the bearing protection device according to the first aspect of the present invention, the hair collecting body is made of a polyimide resin material and the air temperature outside the bearing oil tank is increased to several hundred degrees Celsius. It is a bearing protection device in an exposed environment.

For example, in a thermal power generation facility, when the environment outside the bearing is high temperature and is contained in a large amount in the external air such as coal dust, the shaft of the Zeal part is damaged by foreign matter entering the conventional labyrinth seal part. This is effective for preventing shaft vibration from increasing due to heat generation of the seal portion and for preventing the sliding surface of the bearing from being damaged.

According to a third aspect of the present invention, in the bearing protection device according to the first aspect of the present invention, the material of the hair collection body is made of a cobalt-based alloy material, and the peripheral speed of the hair collection body is several hundred m / sec. It is an effective bearing protection device used for rotating machines under high speed.

The invention corresponding to claim 4 exists above the bearing cover of a bearing device in which lubricating oil is contained in a bearing cover for accommodating a guide bearing or a thrust bearing for supporting a rotating shaft of a vertical shaft type rotating machine. In the bearing cover, which is at different pressures, it is arranged to partition the external communication part, shuts off the air containing dust and minute foreign matter around the bearing outside and the inside of the bearing oil tank, and the gravity of the external foreign matter on the bearing sliding surface or In a bearing protection device for preventing intrusion due to the flow of air around a bearing cover, metal is provided on the notch step portion of a holding plate integrally provided on an inner end side of the bearing cover and having a notch step portion on a rotating shaft side. Or let it be gripped by a non-metallic hair collection body clamp,
One or a plurality of hair collecting bodies made of a resin-based material formed in an annular shape and divided into a single ring or a plurality of rings in a circumferential direction, the inner diameter side end of which is substantially the same as the bearing clearance with respect to the rotating shaft. Alternatively, the dimensional accuracy is determined so as to be smaller by several mm, and the hair collecting body is arranged in the axial direction, and a holding plate provided so as to press the hair collecting body between the holding plate and the holding member is fixed to the holding plate by a fixing bracket. Configuration.

According to a fifth aspect of the present invention, there is provided a bearing device in which lubricating oil is accommodated in a bearing cover accommodating a guide bearing or a thrust bearing for supporting a rotating shaft of a vertical shaft type rotating machine. It is arranged so as to partition the external communication part inside the bearing cover that has different pressures, shuts off the air including dust and minute foreign matter around the outside of the bearing and the inside of the bearing oil tank, and prevents the above-mentioned foreign matter from entering the bearing slip surface. In a bearing protection device for preventing intrusion due to the flow of air around a bearing cover, metal is provided on the notch step portion of a holding plate integrally provided on an inner end side of the bearing cover and having a notch step portion on a rotating shaft side. Or let it be gripped by a non-metallic hair collection body clamp,
One or a plurality of hair collecting bodies made of a resin-based material formed in an annular shape and divided into a single ring or a plurality of rings in a circumferential direction, the inner diameter side end of which is substantially the same as the bearing clearance with respect to the rotating shaft. Alternatively, the dimensional accuracy is determined so as to be smaller by several mm, and the hair collecting body is arranged in the axial direction, and a holding plate provided so as to press the hair collecting body between the holding plate and the holding member is fixed to the holding plate by a fixing bracket. Configuration.

A sixth aspect of the present invention is the same as the bearing protection device of the fourth aspect of the present invention, in the vicinity of the lower side of a portion for transmitting and receiving an exciting current of a vertical rotating electric machine having a slip ring and a current collecting brush. Component parts are provided to prevent brush powder from entering the machine.

[0036]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a main part of a first embodiment of a bearing protection device for a horizontal shaft rotating machine according to the present invention. The same parts as those in FIG. explain.

In FIG. 1, reference numeral 1 denotes a rotating shaft of a horizontal rotating machine, and the rotating shaft 1 is supported by a slide bearing (not shown). The sliding bearing is covered by bearing covers 17 installed on the left and right sides of the bearing, and the bearing cover 17 is immersed in lubricating oil stored as an oil tank 16.

A holding plate 3 having a notch step 15 on the rotating shaft side is integrally provided on the inner end side (shaft end) of the bearing cover 17, and the notch step 15 is made of metal or non-metal. The two hair collection bodies 5 are arranged around the rotation shaft 1 around the rotation shaft 1 formed in an annular shape by being gripped by the hair collection body clamp 6 of
Pressing plate 4 provided to press down these hair collection bodies 5
And these are integrally fixed with mounting bolts 7.

In this case, the inner diameter side of the hair collection body 5 (the tip side in contact with the rotating shaft 1) is set to be substantially the same as the rotating shaft and the bearing gap or several mm smaller than the outer diameter of the shaft. However, due to the spring characteristics of the hair collection body 5, the hair collection body is assembled so that the inner diameter of the hair collection body can contact and slide with the mating shaft.

That is, the contact part 2 between the rotating shaft 1 and the inner diameter side end of the hair collecting body 5 in FIG. 1 is fixed by bringing the tip end of the hair collecting body 5 into close contact with the entire circumference of the rotating part by the fixture. From the state where the shaft at the time of stop of the horizontal shaft bearing comes into close contact with the bearing slip surface,
Due to the rotation, an oil film is formed on the sliding surface of the horizontal shaft bearing, and the hair collecting body 5 is always in contact with any movement of the shaft until the shaft floats up to the vicinity of the center of the bearing. Is to prevent it from occurring.

The hair collection body 5 is formed by bundling resin-based materials having a wire diameter of about 50 to 300 microns in a ring shape. The hair collection body itself is ring-shaped and the material is very soft. Therefore, the accuracy of the inner diameter side tip of the hair collection body 5 can be maintained in the following manner.

In other words, simply by attaching the hair collecting body 5 to the holding base 3 and the holding plate 4, it is not possible to machine the inner diameter side end of the hair collecting body 5 with a lathe or the like for accurately setting dimensions.

Therefore, in this embodiment, the hair collection body 5 is
A metal hair collecting body clamp 6 made of a metal or a non-metal made with a specified dimensional accuracy of the inner diameter is gripped and integrally formed into a ring or a plurality of rings divided in a circumferential direction.
Is machined with dimensional accuracy concentric with the rotating shaft 1 of the holding table 3 and fitted to the notch step 15 on the shaft side, whereby the inner diameter of the hair collection body 5 concentric with the outer diameter of the rotating shaft 1 can be realized. .

By the way, as described above, the inner diameter of the hair collecting body 5 is set to be substantially the same as the shaft-bearing clearance or several mm from the outer diameter of the shaft.
Because of its small size, the hair collecting body 5 is pressed against the outer diameter of the rotating shaft due to the spring characteristics.

Confirmation of the sealing effect of the hair collection body 5 according to the present embodiment, confirmation of zero wear of the hair collection body 5 due to long-time operation, and temperature rise due to frictional heat with the rotating shaft 1 Confirmation of a temperature of 20 ° C. or less is confirmed by the results of a long-term durability verification test, and the function as a bearing protection device including the life is sufficiently satisfied.

Therefore, with such a bearing protection device, the gap between the hair collecting body 5 and the peripheral surface of the rotary shaft 1 is completely closed in any operation state including a stop state. Intrusion of dust and foreign matter contained in the atmosphere into the bearing cover 17 can be completely prevented.

When the environment outside the bearing oil tank is poor, for example, by a cooling method using open pipe ventilation of the rotating electric machine, when dust or foreign matter mixed in the external air passes through the inside of the rotating electric machine, the dust or foreign matter is generated around the bearing oil tank. Also, these external dusts and foreign substances may be scattered.

In the conventional bearing protection device, in such a situation, when there is a gap with the rotating shaft, external foreign matter enters the bearing oil tank and enters the bearing slip surface, so that the bearing slip surface is reduced. In some cases, eventually resulting in bearing burnout.

In the bearing protection device of the present embodiment, since there is no gap between the bearing oil tank and the rotating shaft in any state, no dust and foreign matter outside the bearing oil tank enter the bearing oil tank at all. It is also effective for bearing protection.

In the first embodiment, as the material of the hair collection body 5, a ring-shaped resin material having a wire diameter of about 50 to 300 μm is used. Alternatively, a polyimide resin material may be used.

In the case of a general hair-forming material made of a resin material, there is a problem in heat resistance when the outside air temperature of the bearing is 100 ° C. or more.
In a short operation, the function of the bearing protection device of the horizontal rotating machine may be lost.

In such an environment, by using a polyimide resin material as the material of the hair collection material 5, the function as a bearing protection device for a rotating electric machine can be exhibited.

Further, as the material of the hair collection body 5, a cobalt-based alloy material that withstands a high peripheral speed and has excellent heat resistance may be used.

The above-mentioned resin-based hair growth material has a problem in heat resistance when the seal peripheral speed of the bearing protection device is as high as several hundred m / sec. The function of the bearing protection device is lost.

Even in such an environment, the use of the cobalt-based alloy material as the material of the hair collecting body material 5 enables the function as a bearing protection device for a rotating electric machine to be exhibited.

FIG. 2 is a sectional view showing a main part of a bearing protection device for a vertical rotating machine according to a second embodiment of the present invention. The same parts as those in FIG. The description is omitted, and the same parts as those in FIG.

In the second embodiment, different pressures are present above a bearing cover of a bearing device in which lubricating oil is contained in a bearing cover for accommodating a guide bearing or a thrust bearing for supporting a rotating shaft of a vertical shaft type rotating machine. The bearing cover is arranged so as to partition the external communication part, and shuts off the air containing dust and minute foreign matter around the outside of the bearing from the inside of the bearing oil tank, and the gravity of the foreign matter on the bearing sliding surface or the bearing cover. The present invention is applied to a bearing protection device for preventing intrusion due to the flow of surrounding air, and its configuration is completely the same as that of FIG. 1 except that the rotating shaft is a vertical shaft. Same as the form.

FIG. 3 is a sectional view showing a main part of a third embodiment of the present invention, in which the same parts as those of FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. The same parts as those in FIG. 6 are described with the same reference numerals.

In the third embodiment, a lubricating oil is accommodated in a bearing cover for accommodating a guide bearing or a thrust bearing for supporting the rotating shaft of a vertical shaft rotating machine. In the bearing cover, which is at different pressures, it is arranged so as to partition the external communication part, shuts off the air containing dust and minute foreign matter around the outside of the bearing and the inside of the bearing oil tank, and the bearing of the above foreign matter on the bearing slip surface It is applied to a bearing protection device that prevents intrusion due to the flow of air around the cover, and its configuration is as shown in FIG. 1 except that the rotating shaft is a vertical shaft.
Is exactly the same as that of the first embodiment, and its operation and effect are the same as those of the first embodiment.

In the second and third embodiments, the material of the hair collecting body 5 may be a polyimide resin material or a cobalt-based alloy material.

FIG. 4 is a sectional view showing a main part of a device for preventing brush powder of a vertical shaft rotating electric machine from entering a machine of a rotating electric machine according to a third embodiment of the present invention. Are denoted by the same reference numerals, and the description thereof is omitted. The same components as those in FIG.

In FIG. 4, reference numeral 27 denotes a slip ring shaft of a vertical rotating electric machine to which an annular slip ring 28 is attached. On the outer peripheral surface of the slip ring 28,
A brush holder 3 in which a plurality of current collecting brushes 29 are held on a brush holder support 31 at appropriate intervals in a circumferential direction.
It is pressed by 0.

The slip ring shaft 27 is provided with a ring-shaped convex portion 27 a projecting in the radial direction at a position below the slip ring 28.

The exciting current of the vertical rotating electric machine is
9, the slip ring 28 slides on the end face of the brush, and a large amount of brush powder 32 is generated.

In this embodiment, the ring-shaped convex portion 27a
The same configuration as the bearing protection device shown in FIG. 1 is applied to the outer peripheral surface of the entire surface 14 as a brush powder intrusion prevention device. In this case, the holding base 3 is integrally attached to the shaft-side end of the partition plate 26 disposed opposite to the brush holder support 34, and has an annular shape fitted into the notch step 15 of the holding base 3. The inner diameter side end of the hair collection body 5 is configured to be in close contact with the outer peripheral surface (contact surface) 2 of the ring-shaped convex portion 27a.

Therefore, with such a configuration, the sliding surface 2 of the convex portion 27a on the rotating side and the partition plate 26 on the stationary side are formed.
Is completely closed by the hair collecting body 15, and the brush powder 32 is completely scattered from the space 33 formed by the partition plate 26 and the slip ring housing (not shown) to the rotor side inside the rotary electric machine. Can be prevented.

[0068]

As described above, according to the present invention, it is possible to reliably shut off the air containing dust and minute foreign matter in a poor environment around the outside of the bearing from the inside of the bearing oil tank, and the above-mentioned foreign matter on the sliding surface of the bearing. A bearing protection device for preventing the intrusion of the bearing can be provided.

Although the bearing protection device according to the present invention aims to prevent foreign matter from entering the bearing, it is also effective in preventing oil mist and oil droplets generated inside the bearing from leaking to the outside.

Further, according to the present invention, there can be provided a brush powder intrusion prevention device which can prevent the brush powder of the vertical rotating electric machine from entering the rotating machine.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a cross section of a main part of a bearing protection device for a horizontal shaft type rotating machine as a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a cross section of a main part of a bearing protection device for a vertical rotating machine according to a second embodiment of the present invention;

FIG. 3 is a configuration diagram showing a cross section of a main part of a bearing protection device for a vertical rotating machine according to a third embodiment of the present invention;

FIG. 4 is a cross-sectional configuration diagram showing a main part of a brush powder intrusion prevention device provided in a portion of an upright rotating electric machine that transmits and receives an exciting current as a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram showing a cross section of a main part of a bearing protection device for a conventional horizontal shaft type rotating machine.

FIG. 6 is a cross-sectional view of a main part of a conventional bearing protection device for a vertical rotating machine.

FIG. 7 is a configuration diagram showing a cross-section of a main part of a portion for transmitting and receiving an excitation current of a conventional vertical rotating electric machine including a slip ring and a current collecting brush.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotation axis (horizontal axis or vertical axis), 2 ... Contact surface, 3 ... Holder, 4 ... Holding plate, 5 ... Hair collection body, 6 ... Hair collection body clamp, 7
... Mounting bolts, 12 ... Ring chamber, 13 ... Backing ring, 14 ... Contact area, 15 ... Notch step, 16 ... Bearing oil tank, 17 ... Bearing cover, 18 ... Bearing external dust, 19 ... Ring ring, 20 ... Aluminum Tooth, 22 ... setting gap, 25
... Sliding surface, 26 ... Partition plate, 27 ... Slip ring shaft, 2
8: Slip ring, 29: Current collecting brush, 30: Brush holder, 31: Brush holder support, 32: Brush powder, 33: Slip ring, space in housing, A
... High pressure range, B ... Atmosphere

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masatoshi Kato 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Corporation Head Office (72) Inventor Masatoshi Ando 2-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa F-term (reference) in Toshiba i-Tech Corporation 3J016 AA01 BB02 3J043 AA16 CA13 CB13 DA06 DA09

Claims (6)

[Claims] 1. A bearing device in which lubricating oil is accommodated in a bearing cover installed on the left or right or one side of a bearing that supports a rotating shaft of a horizontal shaft type rotating machine, wherein the bearing cover has a different pressure existing in the bearing cover. The bearing protection device, which is arranged to partition an external communication part, blocks air including dust and minute foreign matter around the outside of the bearing from the inside of the bearing oil tank, and prevents the above-described foreign matter from entering the bearing sliding surface. The metal or non-metallic hair collecting body clamp is gripped by the notch step of the holding plate integrally provided on the inner end side of the bearing cover and having a notch step on the rotating shaft side, and is circumferentially held. One or a plurality of hair-collecting bodies made of a resin-based material formed into a ring or a plurality of ring-shaped annular parts are formed so that the inner diameter side end thereof is substantially the same as the bearing clearance with respect to the rotating shaft or several m.
m, and is arranged in the axial direction with dimensional accuracy determined so as to be smaller, and a holding plate provided so as to hold down the hair collecting body is fixed to the holding plate by a fixing bracket. Bearing protection device for shaft type rotating machines. 2. A bearing cover in which lubricating oil is contained in a bearing cover installed on the left or right or one side of a bearing for supporting a rotating shaft of a horizontal shaft type rotating machine, wherein the bearing cover has a different pressure existing in the bearing cover. In a bearing protection device that is arranged to partition an external communication part, blocks high-temperature air including dust and minute foreign matter around the outside of the bearing from the inside of the bearing oil tank, and prevents the above-described foreign matter from entering the bearing sliding surface. The metal cover or the non-metallic hair collection body clamps the notch step of the holding plate integrally provided on the inner end side of the bearing cover and having the notch step on the rotation shaft side, thereby forming a circumference. One or a plurality of hair collecting bodies made of a polyimide resin material formed into a ring or a ring divided into a plurality of rings in the direction are substantially the same as the bearing gap with respect to the rotating shaft at the inner diameter side end or A few mm smaller The dimensional accuracy is determined, and the hair collecting body is arranged in the axial direction, and a holding plate provided to press the hair collecting body between the holding plate and the holding plate is fixed to the holding plate by a fixing bracket. Bearing protection device for horizontal shaft type rotating machinery. 3. A bearing cover of a bearing device in which lubricating oil is contained in a bearing cover installed on the left or right or one side of a bearing for supporting a rotating shaft of a horizontal shaft type high-speed rotating machine, the bearing cover having different pressures existing in the bearing cover. It is arranged so as to partition the internal and external communication parts, shuts off high temperature and high pressure air including dust and minute foreign matter around the outside of the bearing and the inside of the bearing oil tank, and prevents the above foreign matter from entering the bearing sliding surface. In the bearing protection device, the notch step portion of the holding plate integrally provided on the inner end side of the bearing cover and having a notch step portion on the rotating shaft side is held by a metal or non-metal hair collection body clamp. One or a plurality of hair collecting bodies made of a cobalt-based alloy material formed into a ring or a plurality of rings divided into a plurality of rings in the circumferential direction. Almost the same or several mm smaller A configuration in which the dimensional accuracy is determined so as to be arranged in the axial direction, and a holding plate provided so as to press the hair collection body between the holding plate and the holding plate is fixed to the holding plate by a fixing bracket. A bearing protection device for a horizontal shaft type rotating machine, characterized in that: 4. A bearing cover in which lubricating oil is contained in a bearing cover for accommodating a guide bearing or a thrust bearing for supporting a rotating shaft of a vertical shaft type rotating machine, wherein the bearing cover has a different pressure and is located above the bearing cover. , Which is arranged to partition the external communication part, shuts off the air containing dust and minute foreign matter around the outside of the bearing from the inside of the bearing oil tank, and the gravity of the foreign matter above the bearing slip surface or the flow of air around the bearing cover. In a bearing protection device for preventing intrusion by a metal, non-metallic hair collection made of metal or non-metal is provided on the notch step of the holding plate integrally provided on the inner end side of the bearing cover and having a notch step on the rotating shaft side. One or a plurality of hair collection bodies made of a resin-based material formed in an annular shape and divided into one ring or a plurality of pieces in the circumferential direction by being gripped by a body clamp. Bearing clearance About the same, or the number m
A configuration in which the dimensional accuracy is determined so as to be smaller in the axial direction and is arranged in the axial direction, and a holding plate provided so as to hold the hair collection body between the holding plate and the holding plate is fixed to the holding plate by a fixing bracket. A bearing protection device for a vertical rotating machine, characterized in that: 5. A bearing having a different pressure existing under the bearing cover of a bearing device in which lubricating oil is accommodated in a bearing cover accommodating a guide bearing or a thrust bearing for supporting a rotating shaft of a vertical shaft rotating machine. It is arranged so as to partition the inside and outside communication parts, shuts off the air containing dust and minute foreign matter around the outside of the bearing and the inside of the bearing oil tank, and the flow of air around the bearing cover of the above foreign matter to the bearing sliding surface In a bearing protection device for preventing intrusion by a metal, non-metallic hair collection made of metal or non-metal is provided on the notch step of the holding plate integrally provided on the inner end side of the bearing cover and having a notch step on the rotating shaft side. One or a plurality of hair collection bodies made of a resin-based material formed in an annular shape and divided into one ring or a plurality of pieces in the circumferential direction by being gripped by a body clamp. And bearing clearance Pot the same or number m
A configuration in which the dimensional accuracy is determined so as to be smaller in the axial direction and the hair collecting body is fixed to the holding plate by a fixing metal, and a holding plate provided so as to be pressed between the holding plate and the holding plate. A bearing protection device for a vertical rotating machine, characterized in that: 6. A component similar to that of the bearing protection device according to claim 4, wherein a component similar to that of the bearing protection device according to claim 4 is provided near a lower side of a portion for transmitting and receiving an excitation current of a vertical rotating electric machine having a slip ring and a current collecting brush,
A brush powder intrusion prevention device for preventing the intrusion of brush powder into the machine.