JPH05172147A - Bearing device for horizontal shaft rotary machine - Google Patents

Abstract

PURPOSE:To early find out an abnormal condition by applying a power transmission device having no mechanical contact mechanism so as to suppress noise from a bearing device, and by surely detecting sliding sound around a bearing and a seal part. CONSTITUTION:There are provided a bearing 2 for journalling a rotary shaft 1, a bearing box 3 for supporting therein the bearing 2, an oil tank 6 formed in the lower part of the bearing box 3 and storing therein lubrication oil 5, and a relay tank disposed in the per part of the bearing box 3 and communicating with the bearing 2, and an oil feed pump 8 arranged in the space of the tank 6. The outer peripheral end part of a driven disc 10 formed in one end part of the pump 8 is fitted in a concave groove in a drive disc 10 having the outer peripheral end part fixed to the rotary shaft 1 and formed in a concave shape, with a predetermined gap being held therebetween. A transmission device in which permanent magnets 13, 14 are embedded in the discs facing in the groove at equal intervals on the same circumference, and are arrayed so that the poles are repulsive and attractive one another, transmits the rotation of the rotary shaft to the oil feed pump 8 which is therefore driven for feeding oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing device for a horizontal shaft rotating machine, and more particularly to a bearing oil supply device for supplying a suitable lubricating oil to a radial bearing portion that supports a rotating main shaft.

[0002]

2. Description of the Related Art It is applied to a conventional horizontal shaft rotating machine, for example, a relatively large electric motor or a water turbine generator, and uses the rotation of a main shaft to pump up lubricating oil contained in the device to supply oil to a bearing portion. In a self-lubricating type plain bearing device, the oil ring or pump case is mounted directly on the rotating main shaft, and the lower part is set in the lubricating oil built in the lower part of the oil tank.
There are two types: an oil ring and a viscous pump system that pumps the oil using the viscosity of the lubricating oil to supply oil to the bearing, and a system that uses the power of the rotating main shaft to drive the oil supply pump to supply oil without relying on electrical means. is there.

However, the oil ring system has a poor followability in the high speed range, so that the amount of oil supply decreases, and it cannot be applied in the high speed range. Also, in the viscous pump system, the pump part is necessarily formed to have a larger diameter than the diameter of the bearing, so the temperature rise of the lubricating oil is large, and the lubrication characteristics depend on the viscosity of the oil. It is undeniable that the QH characteristics deteriorate when compared with a pump.

Therefore, the latter refueling pump system is advantageous from the viewpoint of stable pump efficiency and refueling characteristics. Such a known example is disclosed in Japanese Patent Laid-Open No. 61-79098.
In an axle bearing device that is installed on the axle that drives the wheels of an electric locomotive and supports the vehicle body, electric motor, etc., a felt-like refueling pad is brought into contact with the axle, and oil is sucked up from the oil tank using the capillary phenomenon to refuel. There is a system in which the means and the means for supplying oil to the bearing portion by driving the oil pump by using the power of the axle are combined. In this oil pump drive system, gears are used as a mechanism for transmitting power from the axles, and each gear is fixed and connected to the axle and an oil supply pump shaft arranged in oil. The discharge part of the installed oil supply pump is configured to communicate with the axle bearing part, and a combined system is disclosed in which oil is automatically supplied while the axle is driven. Further, there is a known example in which a chain, a belt or the like is used as a transmission medium of an oil supply pump and is installed inside or outside an oil tank to supply oil to a bearing portion.

[0005]

The power transmission devices in the above-mentioned prior art are all mechanisms in which the coupling portions are in mechanical contact with each other, and the rotational power is transmitted by the mutual frictional action, which causes noise. It is difficult to accurately detect abnormal sounds around the bearing sliding part or the seal part by hearing. For this reason, abnormal phenomena such as poor lubrication, one-sided contact and contact at the time of starting / rotating the rotating equipment may be overlooked, which may damage the bearing and eventually cause a burnout accident. In addition, since the coupling part of the power transmission device generates heat and wear due to mechanical friction, countermeasures are indispensable.For example, when the transmission mechanism part is outside the oil tank, a protective cover, an oil supply device, oil leakage countermeasures, etc. Ancillary equipment and its maintenance are indispensable.On the other hand, when installed in lubricating oil, the oil in the oil tank is agitated to raise the temperature, and the generation of wear debris pollutes the oil and accelerates oxidative deterioration. This will shorten the life of the lubricant.

An object of the present invention is to reduce the noise of a bearing device by applying a power transmission device without mechanical contact to drive an oil supply pump and disposing it in an oil tank.
Abnormal conditions can be diagnosed early based on the vibration noise of the seal sliding parts to prevent problems with rotating equipment, and deterioration of the lubricating oil due to wear and stirring and temperature rise can be prevented to improve reliability. To provide a bearing device for a machine.

[0007]

That is, according to the present invention, a bearing for supporting a rotating main shaft of a horizontal axis rotating machine, a bearing box having a bearing support plate for supporting the bearing therein, and a bearing box formed in a lower portion of the bearing box are formed. Installed in the oil tank with the built-in lubricating oil, the relay tank provided at the top of the bearing box to pool the lubricating oil, and the bottom of which communicates with the sliding surface of the bearing, and the space above the oil surface in the oil tank. And a lubrication pump for pumping the lubricating oil in the oil tank to the bearing portion, and as a drive device for this lubrication pump, the lubrication pump shaft is arranged in parallel with the main spindle of rotation, and a driven disk is formed and fixed at the end of the shaft. The outer peripheral edge portion is fastened and fixed to the flange portion formed on the rotating main shaft, and the outer peripheral edge portion is inserted with a predetermined gap in the concave groove of the driving disk having a concave cross section. The same circumference of the driving and driven rotating disks that are arranged and facing each other in the groove The same number of through-holes with the same diameter are opened at equal intervals, and a circular permanent magnet magnetized in the axial direction is embedded and fixed in this opening, and the magnetic poles of the opposing permanent magnets are repelled or attracted. A power transmission device configured to be arranged so as to act, driving the oil supply pump by utilizing the rotational force of the rotary main shaft, and a suction pipe having a tip portion installed in the oil under the oil tank in the oil supply pump, The intended purpose is achieved by the bearing device in which the discharge pipe connected to the relay tank arranged in the upper part is connected by piping.

[0008]

When the main machine is operated and the rotary spindle rotates, the driving disk fixed to the rotary spindle also rotates. Here, a concave groove is formed in the outer peripheral end of the driving disc, and a driven disc fixed to the shaft end of the oil pump is fitted and arranged in the groove with a predetermined gap. In addition, the circular permanent magnets that are periodically embedded and fixed on the same circumference of the opposing surfaces of the driving and driven discs facing each other in the groove are magnetized so that all the magnetic poles have the same polarity. And a transmission device is arranged so as to perform repulsion or suction, and the rotational power of the rotating main shaft is transmitted in a non-contact state to the pump shaft by using the magnetic force of the disks as a medium. Is driven. In this case, if the driving and driven disks have the same size, the oil pump is driven at a speed substantially equal to that of the rotating main shaft. However, it is also possible to obtain the required number of rotations by relatively changing the diameter ratio of the main disk and the driven disk.

As described above, the rotation main shaft is started and the oil supply pump is also operated via the transmission device, and the lubricating oil contained in the lower portion of the oil tank is pumped up from the suction pipe through the discharge pipe to the bearing box. Send oil to the upper relay tank,
The lubricating oil that has flowed into the relay tank is supplied to the bearing sliding portion that communicates from the introduction port at the bottom of the relay tank, and is used for lubrication and cooling.

Therefore, since the bearing device can be made quiet by applying the power transmission device without the mechanical contact mechanism, the sliding noise of the bearing and the seal peripheral portion at the time of starting / rotating the rotating device can be heard by hearing. It is possible to make an accurate judgment, and it is possible to detect abnormal noise due to poor lubrication, one-sided contact, contact, etc. at an early stage and prevent problems such as bearing damage.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a vertical sectional view of a bearing device in which the present invention is applied to a horizontal shaft rotating machine, and FIG. 2 is a vertical sectional view of a power transmission device according to the present invention.

In FIG. 1, a rotary spindle 1 of a horizontal axis rotating machine.
Is supported by a split-type radial bearing 2 supported by a bearing support plate 4 in a bearing box 3 which is vertically divided into two parts, and a lower half part of the bearing box 3 is an oil tank 6 and a lower part thereof is Lubricating oil 5 is built in. A relay tank 20 is provided on the top of the bearing box 3, and the radial bearing 2 is provided on the bottom of the relay tank 20.
An introduction port 21 that communicates with the sliding portion is opened. Further, labyrinth seals 7 are provided on the left and right side walls of the bearing box 3 to prevent the lubricating oil 5 from scattering.

Lubrication of the radial bearing 2 is performed by the bearing housing 3
This is performed by an oil supply pump 8 arranged inside, and this oil supply pump 8 is driven by utilizing the rotational force of the rotary main shaft 1 via a transmission device.

In the structure of this power transmission device, a ring-shaped driven disk 11 is formed and fixed to the end of the oil supply pump shaft 9, and the oil supply pump 8 arranged in parallel to the rotary main shaft 1 has a pump mount 27. It is fixed to the side wall of the space above the oil level a inside the oil tank 6 at the bottom of the bearing box 3. The outer peripheral end portion of the driven disk 11 is fastened and fixed to the flange portion 12 formed on the rotary main shaft 1 with a screw or the like, and the outer peripheral end portion of the groove 15 has a concave cross section. It is inserted and arranged with a predetermined gap c inside. Furthermore, the concave groove 1
5. On the same circumference of the opposing surfaces of the driving disk 10 and the driven disk 11 facing each other inside, the same number of through holes are opened at equal intervals, and the openings are magnetized in the axial direction. The circular permanent magnets 13 and 14 are embedded and fixed, and the magnetic poles on the respective circumferential surfaces are arranged so that all of them have the same polarity, and they are uniformly arranged to perform repulsion or attraction. ing.

That is, the oil supply pump 8 and the rotary main shaft 1 are connected to each other through the non-contact power transmission device applying the magnetic force configured as described above, and at the same time the rotary main shaft 1 of the main machine starts up, the oil supply pump 8 Also, the pump action is always obtained while the rotating main shaft 1 is rotating, but the rotation speed at this time depends on that of the rotating main shaft 1, and almost the same rotation speed is obtained.

On the other hand, an oil suction pipe 16 and a discharge pipe 17 are provided in the oil supply pump 8, and an oil filter 18 is provided at the tip of the oil suction pipe 16 and is installed at the bottom of the oil tank 6. The discharge pipe 17 communicates with the relay tank 20 via a heat exchanger 19 arranged on the outer wall of the upper part of the bearing box 3, and the bottom of the relay tank 20 has an introduction hole communicating with the sliding surface of the radial bearing 2. 21 is opened. Further, oil grooves 22 are circumferentially formed on both end portions of the inner peripheral surface of the radial bearing 2.
Is provided in the lower portion thereof, and an oil drain hole 23 is formed so as to be inclined in the axial direction and flow down to the oil drain chamber 25 side.

The lower portion of the oil tank 6 is partitioned by the bearing support plate 4 into an oil discharge chamber 25 and an oil supply chamber 26, and both chambers are communicated with each other through a communication hole 24 provided in the lower portion of the bearing support plate 4. The oil supply pump 8 and the oil suction pipe 16 are provided in the oil supply chamber 26.
The bearing device is disposed on the side.

Next, the operating principle of the above bearing device will be described. When the main machine is operated and the rotary spindle 1 is activated and rotates, the driving disk 10 fixed to the rotary spindle 1 also rotates. At this time, the outer peripheral end of the driven disc 11 fixed to the oil supply pump shaft 9 is inserted and disposed with a gap c in the concave groove 15 at the outer peripheral end of the driving disc 10 on the driving side.
Further, as shown in FIG. 2, the same number of permanent magnets 13 and 14 are embedded and fixed to the respective side end faces of the driving and driven discs 10 and 11 which face each other. In the case of the embodiment shown in FIG. Pole and N pole, and S pole and S pole are arranged in the same polarity, and are shown to perform repulsive action, and between the magnetic poles periodically arranged on the circumference of each other by repulsive force, the other side It stands still with its magnetic poles in place. When the driving disk 10 rotates in the direction of arrow N ₁ , the driven disk 11 is rotated in the direction of arrow N _{2 by} the mutual repulsive force of the permanent magnets 13 and 14 of the driving and driven disks 10 and 11. Therefore, the rotary power of the rotary main shaft 1 is transmitted to the pump shaft 9 via the magnetic force in a non-contact state to drive the oil supply pump 8. Incidentally, when the magnetic poles on the facing surface are arranged as the N pole and the S pole, they are similarly rotated by the mutual attractive force.

When the oil supply pump 8 is operated, the suction pipe 1 installed at the bottom of the oil supply chamber 26 of the oil tank 6 is operated by the pump action.
The lubricating oil 5 is sucked up from the oil filter 18 at the tip of the No. 6, and flows into the heat exchanger 19 through the discharge pipe 17, and the cooled lubricating oil is delivered into the relay tank 20. The oil that has flowed out into the relay tank 20 is introduced into the sliding surface of the radial bearing 2 through an introduction hole 21 provided in the bottom portion while forming an oil surface in this portion, and is used for lubrication and cooling.
Then, the oil that contributes to the lubricating action and has a high temperature is collected in the oil groove 22 provided on the circumference of the sliding surface, and passes through the oil drain groove 23 that is inclined and processed, as shown by the arrow b. It flows down onto the oil surface of the oil tank 6 partitioned by the support plate 4 on the oil discharge chamber 25 side. Further, the oil discharge chamber 25 and the oil supply chamber 26 communicate with each other through the communication hole 24. Even if foreign matter or the like is mixed in the oil discharge that falls from the radial bearing 2, the oil discharge chamber 25 is deposited on the oil discharge chamber 25 side and the oil supply chamber 26 side Never enter.

As described above, in the bearing device of this embodiment, by applying the transmission device applying the magnetic force, the mechanical contact mechanism of the coupling portion is eliminated and the noise can be reduced. The sound can be accurately judged by hearing, and abnormal sounds due to poor lubrication, uneven contact, contact, etc. can be detected early and troubles such as bearing damage can be prevented.

Further, since mechanical friction and wear are eliminated, maintenance of the joint portion is unnecessary, and further, the oil supply pump 8
Since the entire transmission including the above is arranged in the space above the oil surface, there is no need to stir the lubricating oil in the rotating part, and it is possible to avoid an undesired temperature rise of the lubricating oil even at high speed rotation.

By the way, the permanent magnet 1 constitutes the transmission device.
The driving and driven discs 10 and 11 for holding 3 and 14 themselves are not magnetized, but a non-magnetic material such as stainless steel or aluminum alloy is used in order to prevent the magnetic flux density of the permanent magnets 13 and 14 from being dispersed. It is a good idea to do it.

If the driving and driven disks 10 and 11 have the same size, the oil supply pump 8 is rotated at the same speed as the rotating main shaft 1.
Is driven. However, the applicable models cover a wide range from low speed to high speed machines, and it is necessary to select the number of rotations of the pump accordingly, and the required number of rotations of the oil supply pump 8 in that case is the same as in the case of the gear acceleration / deceleration ratio. Considering, for example, when the rotation speed on the side of the rotary spindle 1 is too high, the diameter of the driven disk 11 is relatively larger than that of the driving disk 10, and when it is too low, the diameter of the driven disk 11 is made smaller, and the diameter ratio of the two is reduced. The required number of rotations can be obtained with. Further, the rotational speed can be changed even if the driving and driven disks 10 and 11 have the same diameter and the number of permanent magnets 13 and 14 is different from each other.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention. In the transmission shown in FIG. 2, the cross-sectional shape of the outer peripheral end of the driven side disk fixed to the oil pump 8 is the driving circle. The plate 10 is formed in the same shape as that of the plate 10, and the mating leg portions 28, 28 'are fitted into the mutually concave groove portions 15, 15' with a gap c, and the opposing surfaces are formed as described above. Similarly, the permanent magnets 13 and 14 are arranged and fixed to form a transmission device.

According to this structure, since the facing surfaces of the magnetic poles increase, even if the load of the oil pump 8 on the driven side increases, the power of the rotary main shaft 1 is efficiently transmitted without slipping, The oil supply pump 8 can be driven, and if the number of facing surfaces is further increased, a larger load can be obtained.

FIGS. 4 and 5 show another embodiment in which the driving disc 10 is formed and fixed to the rotating spindle 1. The inner diameter portion of the driving disc 10 is larger than the outer diameter portion of the rotating spindle 1. And is formed in a tapered shape, and the side end surface of the driving disk 10 is provided with the collar portion 12.
The rotary spindle 1 and the driving disc 10 are contacted with the end face and positioned.
In the space between and, a two-divided tapered bush 29 as shown in FIG. 5 is inserted as shown by the arrow d, and the spring pressure of the bush 29 or the wedge effect is used to drive the circular disc 10 This is a method of fixing the gears, and the assembly can be easily performed even if the transmission device is enlarged.

[0027]

According to the present invention, by applying a transmission device applying magnetic force, a mechanical contact mechanism is eliminated at the connecting portion, and noise can be reduced. Therefore, the sliding sound around the bearing and the seal can be heard. It is possible to make an accurate judgment by detecting abnormal sounds due to poor lubrication, one-sided contact, contact, etc., and prevent troubles such as bearing damage.
Further, since the transmission device is arranged in the space above the oil surface in the oil tank, the lubricating oil in the oil tank is not agitated, and deterioration of the lubricating oil and temperature rise due to abrasion powder can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a bearing device for a horizontal shaft rotating machine showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a power transmission device according to the present invention.

FIG. 3 is a vertical cross-sectional view of a power transmission device showing another embodiment of the present invention.

FIG. 4 is a vertical sectional view of a driving disk fixed to a spindle according to another embodiment of the present invention.

FIG. 5 is a perspective view of a fixed bush that is divided into two parts.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotating main shaft, 2 ... Radial bearing, 3 ... Bearing box, 5 ... Lubricating oil, 6 ... Oil tank, 8 ... Oil pump, 10 ... Driving disk, 1
DESCRIPTION OF SYMBOLS 1 ... Followed disk, 12 ... Collar part, 13, 14 ... Permanent magnet, 1
5: concave groove, 28: leg.

Claims (7)

[Claims] 1. A bearing for supporting a rotating main shaft of a horizontal shaft rotating machine,
A bearing box having a bearing support plate for supporting the bearing therein, an oil tank formed in the lower part of the bearing box and containing lubricating oil, and a communicating surface provided in the upper part of the bearing box and communicating with a sliding surface of the bearing. Relay tank, an oil pump for pumping the lubricating oil in the oil tank to supply the bearing portion, and the oil pump driving device, which has a flange portion on a part of the rotary main shaft and has a groove with an outer peripheral portion having a concave shape. The drive shaft is attached and fastened, and the pump shaft end is arranged such that the pump shaft is parallel to the rotary main shaft. While fixing the ring-shaped driven discs that are fitted and arranged with a gap of, the same number of through holes are opened at equal intervals on the same circumference of the opposing faces of the driving and driven disc side faces, A permanent magnet magnetized in the axial direction is embedded and fixed in each opening And each opposing magnetic pole has a power transmission device arranged so as to generate an attraction or repulsion action, and uses the power of the rotary main shaft to supply lubricating oil to the bearing portion. Bearing device for a horizontal axis rotating machine. 2. The oil supply pump and its power transmission device according to claim 1, wherein said oil supply pump and said power transmission device are arranged in a space above the oil surface in said bearing box, and the oil suction part of said oil supply pump is partitioned by said bearing support plate. A bearing device for a horizontal axis rotating machine, which is installed such that it is always immersed in the lubricating oil in one of the compartments of the oil tank in which the amount of lubricating waste oil flowing down from the bearing portion is smaller. 3. The driving disk according to claim 1, wherein the driven disk formed at the end of the oil pump has the same outer peripheral end section as that of the driving disk. A bearing device for a horizontal axis rotating machine, wherein leg portions of mutual discs are fitted and arranged in a predetermined groove with a predetermined gap, respectively. 4. A horizontal axis rotating machine according to claim 1, wherein the number of said permanent magnets arranged at equal intervals on the same circumference of the facing surface of each of said driving and driven disks is different. Bearing device. 5. A bearing device for a horizontal shaft rotating machine according to claim 1, wherein the outer diameters of the driving and driven discs are relatively different. 6. A bearing device for a horizontal shaft rotating machine according to claim 1, wherein said driving and driven discs for embedding and fixing said permanent magnet are made of a non-magnetic material of stainless steel or aluminum alloy. 7. The drive mechanism according to claim 1, wherein the inner diameter portion of the driving disk is tapered and is larger than the outer diameter portion of the rotating main shaft, and the space is defined between the rotating main shaft and the driving disk. A bearing device for a horizontal shaft rotary machine, in which a two-divided bush having the same size as the inner diameter tapered portion of the driving disk is press-fitted and fixed.