JPH1162971A - Thrust bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent cost increase required for restoration caused by time and labor for repair by providing a feed oil pipe with an orifice for regulating the flow rate of lubricating oil, and detecting abnormality of flow rate of the lubricating oil. SOLUTION: An easily detachable orifice 36 for regulating the flow rate of lubricating oil fed to each pad 4 is installed in each feed oil pipe 35. When foreign matters are accumulated upstream of the orifice 36, the flow rate of the lubricating oil fed to the pad 4 decreases. Abnormality of this flow rate is detected by a comparator 38 through a high pressure flow meter 33 and an amplifier 37, and an alarm 39 sounds an alarm to inform an operator on the basis of an output signal of the comparator 38. In this case, only the orifice 36 of the feed oil pipe 35 in a path feeding lubricating oil to the pad 4 where the alarm is generated is detached to easily perform inspection and repair so as to reduce restoration cost, and reliability to a static pressure oil-fed type thrust bearing is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust bearing applied to a shaft of various types of rotating bodies.

[0002]

2. Description of the Related Art FIGS. 2 and 3 are explanatory views of a conventional hydrostatic oil-supply type thrust bearing used for a shaft support of various rotating bodies. In the figure, a static pressure oil supply type thrust bearing supports a thrust load of the rotating shaft 1 while rotating a rotating body (not shown). Therefore, a collar 3 is attached to a lower end of the rotating shaft 1 via a pin 2 and the collar 3 is attached. It is supported by a plurality of pads 4. Under the pad 4, members for equalizing the thrust load such as the pivot receiver 5, the upper rocker 6, the connection pin 7, and the lower rocker 8 are provided. Even if the collar 3 is inclined with respect to the bottom surface of the housing 12, each member is provided. The pads 4 incline according to the collar 3 to automatically adjust the height with respect to the bottom surface of the housing 12, and the plurality of pads 4 uniformly support the thrust load of the collar 3 by the principle of flap. ing. The collar 3 is supported in the radial direction via a driven shaft 9, a self-aligning bearing 10, a holding plate 11, and the like, so that the collar 3 does not shift in the radial direction.

The surface of the pad 4 is supplied with high-pressure lubricating oil via an oil supply pipe 35 so that the pad 4 supports the collar 3 in a non-contact manner.
Oil film is formed. The lubricating oil is supplied to the surface of the pad 4 via the high-pressure pump Pi, the primary filter 31, the collecting pipe 32, the oil supply pipe 35, the oil supply hole 4a in the pad 4, the orifice 36 mounted in the oil supply hole 4a, and the like. ,
High-pressure lubricating oil is supplied between the collar 3 and the pad 4. Lubricate between the collar 3 and the pad 4 to make the housing 1
The lubricating oil accumulated in the tank 2 is collected in the tank 35 by the drain pump Po, and the height of the lubricating oil level in the tank 35 is kept constant.

[0004]

As described above, in the conventional thrust bearing, the orifice 36 for adjusting the flow rate of the lubricating oil for lubricating between the collar 3 and the pad 4 is attached to the oil supply hole 4a in the pad 4. If foreign matter accumulates in the orifice 36, the flow rate of the lubricating oil supplied to the pad 4 decreases, the load capacity of the pad 4 decreases, and the collar 3 and the pad 4 come into direct contact with each other and seizure occurs. May occur.

When the collar 3 and the pad 4 are burned in such a manner, the rotating shaft 1, the pin 2, the collar 3, and the pad 4
It has to be repaired by opening the orifice 36 and exchanging the orifice 36, etc., which has the disadvantage that the repair requires a lot of manpower and time, and the cost required for recovery is high.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and a lubricating oil is forcibly supplied to a pad for supporting a thrust load of a rotating shaft through an oil supply pipe. An orifice for adjusting the flow rate of the lubricating oil is provided in the oil supply pipe in the thrust bearing, and an abnormality in the flow rate of the lubricating oil in the oil supply pipe is detected.

As described above, in the thrust bearing according to the present invention, the orifice for adjusting the flow rate of the lubricating oil is installed on the oil supply pipe which can be easily removed.
The flow rate of the lubricating oil supplied to each pad is detected by, for example, a high-pressure flow meter, and whether or not the flow value is normal is determined by a comparator. Is automatically detected, and when foreign matters accumulate in the orifice, the flow rate of the lubricating oil supplied to the pad decreases. By detecting this flow rate abnormality,
Only the orifice of the oil supply pipe that supplies the lubricating oil to the pad can be removed for easy inspection and repair.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a hydrostatic lubrication type thrust bearing according to an embodiment of the present invention. In the figure, the hydrostatic lubrication type thrust bearing according to the present embodiment is used for a shaft support of various kinds of rotating bodies, and has a simple orifice for adjusting a flow rate of lubricating oil for lubricating between a collar and a pad. If the flow rate is abnormal, the flow rate of the lubricating oil supplied to each pad is detected by a high-pressure flow meter, and the flow rate value is determined by a comparator to determine whether the flow rate is normal. An alarm is issued by an alarm. In the drawing, reference numeral 1 denotes a rotating shaft of a rotating body (not shown), 2 denotes a pin for attaching the collar 3 of the thrust bearing to the rotating shaft 1, 4 denotes a pad for supporting the collar 3, and 4 a supplies lubricating oil to the surface of the pad 4. Lubrication holes,
5 is a pivot receiver for the pad 4, 6 is an upper rocker of the thrust bearing, 9 is a driven shaft of the same thrust bearing, 10 is a self-aligning bearing of the same thrust bearing, 11 is a holding plate of the same thrust bearing, 12 Is also the housing of the thrust bearing, 31 is a primary filter of lubricating oil, 32 is a collecting pipe for lubricating oil, 33 is a high-pressure flow meter for detecting the flow rate of lubricating oil, 34 is a secondary filter of lubricating oil, and 35 is lubricating oil. Supply pipe to the pad 4; 36, an orifice for adjusting the flow rate of the lubricating oil; 37, an amplifier for amplifying the output signal of the high-pressure flowmeter 33; 38, the flow rate of the lubricating oil based on the output signal of the amplifier 37; A comparator 39 for determining whether the value is a value or not is an alarm device for notifying an abnormality in the flow rate of the lubricating oil.

That is, in the present hydrostatic lubrication type thrust bearing, a collar 3 is attached to the lower end of the rotating shaft 1 via a pin 2 to support a thrust load of the rotating shaft 1 while rotating a rotating body (not shown). The collar 3 is supported by a plurality of pads 4. Under the pad 4, members for equalizing the thrust load such as the pivot receiver 5, the upper rocker 6, the connection pin 7, and the lower rocker 8 are provided. Even if the collar 3 is inclined with respect to the bottom surface of the housing 12, each member is provided. The pads 4 incline according to the collar 3 to automatically adjust the height with respect to the bottom surface of the housing 12, and the plurality of pads 4 uniformly support the thrust load of the collar 3 by the principle of flap. ing. The collar 3 is supported in the radial direction via a driven shaft 9, a self-aligning bearing 10, a holding plate 11, and the like, so that the collar 3 does not shift in the radial direction.

High-pressure lubricating oil is supplied to the surface of the pad 4 through an oil supply pipe 35 so that the pad 4 supports the collar 3 in a non-contact manner.
Oil film is formed. The lubricating oil is supplied to the surface of the pad 4 via the high-pressure pump Pi, the primary filter 31, the collecting pipe 32, the oil supply pipe 35, the oil supply hole 4a in the pad 4, the orifice 36 mounted in the oil supply hole 4a, and the like. ,
High-pressure lubricating oil is supplied between the collar 3 and the pad 4. Lubricate between the collar 3 and the pad 4 to make the housing 1
The lubricating oil accumulated in the tank 2 is collected in the tank 35 by the drain pump Po, and the height of the lubricating oil level in the tank 35 is kept constant.

Further, as shown in the figure, the present static pressure oil supply type thrust bearing is provided on each oil supply pipe 35 from which orifices 36 for adjusting the flow rate of lubricating oil supplied to each pad 4 can be easily removed. ing. In addition, each pad 4
A flow meter 33 for detecting the flow rate of the lubricating oil is provided in the path of the lubricating oil supplied to the pad 4. The flow rate of the lubricating oil supplied to each pad 4 is detected by the flow meter 33. The output signal of 33 is input to a comparator 38 via an amplifier 37, and the comparator 38 determines whether or not the flow rate of the lubricating oil is a normal value. If the flow rate value is abnormal, an alarm 39 is activated. It has become.

In a conventional thrust bearing, an orifice for adjusting a flow rate of lubricating oil for lubricating between a collar and a pad is attached to an oil supply hole in the pad. It must be repaired by opening the rotating shaft, pins, collars, pads, etc., and replacing orifices, etc. I have.

On the other hand, in the present hydrostatic type thrust bearing, the orifice 36 is installed in an oil supply pipe 35 from which the oil can be easily removed, and the flow rate of the lubricating oil supplied to each pad 4 is measured by the high-pressure flow meter 33. The comparator 38 detects whether the flow rate value is normal or not, and if the flow rate value is abnormal, the alarm 39 issues an alarm.

When foreign matters accumulate upstream of the orifice 36, the flow rate of the lubricating oil supplied to the pad 4 decreases. The comparator 38 detects this flow rate abnormality via the high-pressure flow meter 33 and the amplifier 37, and based on the output signal of the comparator 38,
9 issues an alarm and informs the operator. In this case, it is possible to easily perform inspection and repair by removing only the orifice 36 of the oil supply pipe 35 in the path for supplying the lubricating oil to the pad 4 that has issued the alarm, and the restoration cost is reduced. Further, the reliability of the hydrostatic thrust bearing is improved.

[0015]

The thrust bearing according to the present invention is constructed as described above, and when foreign matters accumulate in the orifice, the flow rate of lubricating oil supplied to the pad decreases. By detecting this flow rate abnormality, only the orifice of the oil supply pipe that supplies the lubricating oil to the pad is removed and easily inspected.
Since it can be repaired, no labor or time is required for the repair, and the cost required for recovery is reduced.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a hydrostatic lubricating thrust bearing according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of an orifice thereof. It is.

FIG. 2 is a cross-sectional view of a conventional hydrostatic lubrication type thrust bearing.

FIG. 3A is a development view of a collar, a pad and the like in a circumferential direction, and FIG. 3B is a cross-sectional view of the orifice.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary shaft 2 Pin 3 Collar 4 Pad 4a Oil supply hole 5 Pivot receiver 6 Upper rocker 9 Follower shaft 10 Self-aligning bearing 11 Holding plate 12 Housing 31 Primary filter 32 Collecting pipe 33 High pressure flow meter 34 Secondary filter 35 Oil supply pipe 36 Orifice 37 amplifier 38 comparator 39 alarm

Claims (1)

[Claims] In a thrust bearing in which lubricating oil is forcibly supplied to a pad for supporting a thrust load of a rotating shaft via an oil supply pipe, an orifice for adjusting a flow rate of the lubricating oil is provided in the oil supply pipe. A thrust bearing characterized by comprising means for detecting an abnormality in the flow rate of lubricating oil in an oil supply pipe.