JP2704100B2 - Lubricating oil supply system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricant supply system for supplying a lubricant to a bearing such as a roller disposed in a continuous casting machine, a steel (hot or cold) rolling mill, or the like. More specifically, the present invention relates to a lubricating oil supply system having a means for monitoring the supply of lubricating oil to a bearing and capable of suitably preventing a trouble due to running out of lubricating oil in the bearing.

[0002]

2. Description of the Related Art As is well known, a rotating shaft of a roller such as a slab support roller of a continuous casting machine and a sliding shaft of a cylinder used in a press facility are supported by various bearings (bearings). ing.

[0003] Grease and lubricating oil are generally used as lubricants for bearings. However, continuous casting machines, rolling mills for steel materials, facilities for producing magnetic tapes such as video tapes and audio tapes, printing facilities, press facilities and the like are used. In equipment having a large number of rollers and cylinders and a large number of bearings, a lubricant supply system such as grease is used to supply the lubricant to each bearing at once.

FIG. 4 shows a conceptual diagram of an example of a grease supply system. In the supply system shown in FIG.
Grease is supplied from a grease tank 70 by a pump 72, branches off from a main pipe, and is distributed to a first distribution valve 74 (74A, 74A, 74A).
74B, 74C...).

Here, taking the grease supplied to the first distribution valve 74A as an example, in the illustrated example, the first distribution valve 7A is used.
The grease supplied to 4A is supplied to the four second distribution valves 76.
(76A, 76B, 76C and 76D)
It is further divided into four parts (the second distribution valve 76B is illustrated in the figure) and distributed to the third distribution valves 78 (78A, 78B, 78C and 78D). The grease is supplied to the third distribution valve 78
(A third distribution valve 78C is illustrated in the figure), and the bearings 84, which are further divided into four, and which support rollers 80 and 82, such as a continuous casting support roller of a continuous casting machine, are supported.
86, and 88, 90.

[0006] Such a lubricant is supplied not only in a system using grease as a lubricant, but also in a system supplying lubricating oil as a lubricant, or supplying lubricating oil by transporting the lubricating oil by a transport gas. In the system, lubricating oil is supplied to the bearings in substantially the same manner.

[0007] In these lubricant supply systems,
In most cases, grease or lubricating oil supplied to the bearing is not recovered, but leaks from between the seal of the bearing and the shaft and is discharged out of the system.

[0008]

In such a lubricant supply system, whether or not the lubricant is normally supplied to each bearing is monitored by a lubricant distribution valve arranged in the system. Is done in a way that confirms the operation.

However, according to this method, it is not possible to diagnose the supply state of the lubricant by monitoring each of the bearings. Therefore, a trouble such as a clogging of the lubricant transport pipe occurs and the supply of the lubricant to the bearings occurs. However, it is difficult to diagnose which bearing or distributing valve has a trouble and supply to which bearing has been stopped. In addition, in the method of checking the operation of the distribution valve, the transportation pipe is clogged after the final distribution valve (the third distribution valve 78 in the example shown in FIG. 4) and the supply of the lubricant to the bearing is stopped. In this case, this trouble cannot be detected and the location of the trouble cannot be specified.In many cases, the operation continues without lubrication supplied. Serious troubles such as breakage of the rollers, stoppage of the rollers, damage to the facilities, and adverse effects on the products occur.

Further, when grease is used as a lubricant, pipes are easily clogged due to solidification of the grease. In this case, the supply of grease from all systems thereafter is stopped, so that the equipment is not operated. In many cases.

An object of the present invention is to solve the above-mentioned problems of the prior art, and is provided in various facilities such as a continuous casting machine, a steel rolling mill, a magnetic tape manufacturing facility, a printing facility, and a press facility. It is possible to monitor the lubricating oil supply status of each bearing, which allows the bearings to always operate in a good condition. It is an object of the present invention to provide a lubricating oil supply system capable of quickly detecting an occurrence location and preventing serious troubles such as bearing damage and roller stoppage.

[0012]

In order to achieve the above object, the present invention provides a lubricating oil supply system for supplying lubricating oil to a plurality of bearings, comprising: a lubricating oil supply source for supplying lubricating oil; A gas supply source for supplying a lubricating oil transport gas, at least one mixer for making the same transport path for the lubricating oil and the transport gas supplied from the lubricating oil supply source and the gas supply source, and the mixing; At least one distributor for distributing lubricating oil and a transporting gas whose transport path is made identical by means of a dispenser and supplying the lubricating oil and the transport gas to each bearing; a discharge path for surplus lubricating oil disposed on each bearing; A lubricating oil supply system, comprising: a pressure and / or flow rate measuring means for the gas for transporting the lubricating oil disposed in a path.

It is preferable that a lubricating oil distributor is provided between the lubricating oil supply source and the mixer, and that a means for confirming the operation of the lubricating oil distributor and the mixer is further provided.

[0014]

The lubricating oil supply system according to the present invention is a system for supplying lubricating oil to a bearing by transporting the lubricating oil by a lubricating oil transport gas, and further providing a discharge path for the lubricating oil from the bearing. It has a configuration in which means for measuring the pressure and / or flow rate of the transport gas is provided in the discharge path.
A system for transporting lubricating oil using a lubricating oil transport gas is to use a mixer to make the transport path between the transport gas and a relatively small amount of lubricating oil identical, so that the lubricating oil flows through the flow of the transport gas and bearings etc. The lubricating oil is attached to the transport pipe wall by the transport gas flowing through the transport pipe for lubricating oil. (See FIG. 2), and supplied to a lubricated body such as a bearing.

As described above, in the system for transporting lubricating oil by the transport gas, the lubricating oil travels along the transport tube wall by the wind force of the transport gas and is supplied to the bearings. Therefore, if the transport gas has reached the bearing in a predetermined state (pressure, flow rate, etc.), it can be considered that the lubricating oil is being supplied to the bearing in a steady state. In the lubricating oil supply system of the present invention, a lubricating oil is supplied to each bearing by providing a lubricating oil discharge path in the bearing and installing a pressure and / or flow rate measuring means of the transport gas in the discharge path. Can be monitored.

Therefore, according to the lubricating oil supply system of the present invention, it is possible to monitor the lubricating oil supply state of each of the bearings provided in various facilities and to operate the bearings always in a good state. , Or even when the supply of lubricating oil to the bearings is stopped,
In addition, trouble occurrences can be detected quickly,
Serious troubles such as bearing breakage and roller stoppage can be prevented. Further, since the lubricating oil is transported by the transport gas, the transport pipe is less likely to be blocked due to solidification of the grease and the like, as compared with a system using grease or ordinary lubricating oil.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a lubricating oil supply system according to the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.

FIG. 1 conceptually shows an example of a lubricating oil supply system according to the present invention. Lubricating oil supply system 1 shown in FIG.
0 is a slab support roller disposed in a secondary cooling zone of a continuous casting machine, a rolling roller disposed in a hot or cold rolling mill for steel materials, and disposed in a magnetic tape manufacturing facility or a printing facility. A system for supplying lubricating oil to bearings 16, 18, 20, 22,..., Such as conveying rollers, which support rollers 12, 14,. An air unit 26 for supplying air (transport air) as a gas; a mixer 28 for making the transport path of the transport air and the lubricating oil the same; a first distribution valve 30 and a second distribution valve 32 as distributors And discharge paths 34, 36, 38, 40 for discharging the lubricating oil from the bearings.
, And pressure gauges 42, 44, 46, 48, which are installed in the respective discharge paths and measure the air pressure of the transport air. In FIG. 1, the dashed line indicates the flow of the lubricating oil, the dotted line indicates the flow of the transport air, and the solid line indicates the flow of the lubricating oil and the transport air. Each part is connected by a transport pipe along this flow.

In the example shown in FIG. 1, the lubricating oil is supplied from the tank unit 24 to the lubricating oil distributor 50 in a fixed amount. As will be described in detail later, in a lubricating oil supply system that transports and supplies lubricating oil by transport air, the lubricating oil moves on the pipe wall of the transport pipe by the wind force of the transport air. Therefore, as the lubricating oil used in the present invention, all known lubricating oils can be used as long as they have a viscosity that enables wind transport according to the flow rate of the transport air.

From the tank unit 24 to the lubricating oil distributor 50
The means for quantitatively supplying the lubricating oil is not particularly limited, and any known liquid quantitative supply means such as a method using a quantitative pump or a method using a differential pressure can be used.

The lubricating oil distributor 50 supplied with the lubricating oil from the tank unit 24 distributes the lubricating oil and supplies it to the mixer 28. The lubricating oil distributor 50 used in the present invention is not particularly limited, and any known liquid distributing means such as a method using a branch pipe and various mechanical methods can be used.
The distribution ratio of the lubricating oil by the lubricating oil distributor 50 may be all uniform, or may be such that different amounts of lubricating oil are supplied to the respective mixers 28 as needed.

In order to realize a stable supply of lubricating oil to the bearings, it is preferable that the lubricating oil distributor 50 is provided with a means for confirming its operation. The means for confirming the operation of the lubricating oil distributor 50 is not particularly limited, and a method for measuring the flow rate and pressure of the lubricating oil at the lubricating oil outlet of the lubricating oil distributor 50 and the transport pipe downstream of the lubricating oil distributor 50, Various known methods such as a method of detecting the movement of the spool with a proximity switch or the like can be used as long as the spool operates sequentially with the oil itself.

On the other hand, the air unit 26 supplies compressed air serving as a transport gas to the mixer 28. If the air unit 26 can stably supply air having a predetermined flow rate and a predetermined pressure, a combination of a compressor and a flow rate adjusting means is used. Various air supply means can be used. In the lubricating oil supply system of the present invention, the transport gas is not limited to air,
Needless to say, nitrogen, various inert gases, and other gases may be used as needed.

The mixer 28 has the same transportation route between the lubricating oil supplied from the tank unit 24 and the compressed air supplied from the air unit 26. The lubricating oil supply system 10 in the illustrated example is an example. Six mixers 28 as
(28A, 28B, 28C, 28D, 28E and 28
F).

The mixer 28 supplies the transport air and the lubricating oil to the downstream (in the flow direction of the lubricating oil and the like) transport pipe by making the transport path of the separately supplied lubricating oil and the compressed air the same. . When the transport path of the lubricating oil and the compressed air is made the same in the mixer 28, the lubricating oil adheres to the pipe wall of the transport pipe and travels along the pipe wall by the flow of the transport air. Here, the lubricating oil immediately after being discharged from the mixer 28 is shown in FIG.
As shown in FIG. 2 (a), it is in the form of water droplets, but as it progresses downstream, it becomes a state that is entirely leveled, and finally becomes bellows-like as shown in FIG. 2 (b). Proceed downstream through the wall.

The supply amount of the lubricating oil to the mixer 28 and the pressure of the compressed air (or the amount of the lubricating oil and the flow rate of the transport air, and the balance thereof) depend on the well-known lubricating oil which transports the lubricating oil with the transport gas. As with the supply system, it is appropriately determined according to various factors such as the position of the bearing (particularly the height difference of the transport route), the transport distance, the diameter of the transport pipe, the amount of lubricating oil required by the bearing, and the like.

Since the lubricating oil supply system 10 of the present invention utilizes such a system for transporting lubricating oil by transport air, the lubricating oil supply system 10 is caused by solidification of grease as compared with lubricating oil supply using only grease or lubricating oil. There are no clogging of transport pipes and there are few troubles.

In order to realize a stable supply of lubricating oil to the bearings, it is preferable that a means for confirming the operation is provided in the mixer 28 as well. Similar to the lubricating oil distributor 50 described above, there is no particular limitation on the means for confirming the operation of the mixer 28, and the flow rate of the lubricating oil in the transport pipe downstream of the mixer 28,
Any known means such as a method for measuring air pressure can be used.

In the illustrated lubricating oil supply system 10, the lubricating oil and the transportation air whose paths are made identical by the mixer 28 are distributed into four parts and supplied to the first distribution valve 30. In FIG. 1, for simplification of the drawing, the first distribution valve 30
Only A, 30B, 30C and 30D are illustrated. First
The distribution valve 30 distributes the lubricating oil and the transportation air supplied from the mixer 28 and supplies them downstream. In the illustrated example, the first distribution valve 30 distributes the supplied lubrication oil and the transportation air. It is distributed to four and supplied to the second distribution valve 32.

In the lubricating oil supply system 10 of the present invention, the available distribution valve (distributor) is not particularly limited.
Various distribution means commonly used in a system for transporting lubricating oil by a transport gas, such as a method using a branch pipe and various mechanical methods, are available. Further, the distribution ratios of the lubricating oil and the transport air by the first distribution valves 30 may all be uniform, or different amounts may be supplied to the respective second distribution valves 32 as needed.

The lubricating oil and the transportation air distributed by the first distribution valve 30 are supplied to the second distribution valve 32 and further distributed to four. In FIG. 1, only the second distribution valves 32A, 32B, 32C and 32D are illustrated by taking the supply from the first distribution valve 32C as an example to simplify the drawing. The second distribution valve 32 distributes the lubricating oil and the transportation air supplied from the first distribution valve 30 and supplies them to the bearings respectively. In the illustrated example, the second distribution valve 32 supplies the supplied lubrication oil. The oil and transportation air are divided into four parts, bearings 16, 18, 20, 22 ... respectively.
... to supply. In the illustrated example, in order to simplify the drawing, the bearings 16 and 1 are moved from the second distribution valve 32B.
Only the supply routes to 8, 20, and 22 are illustrated.

Like the first distribution valve 30 described above, there is no particular limitation on the distribution valve that can be used as the second distribution valve 32, and even if the distribution ratios of the lubricating oil and the transport air are all uniform. Or different amounts as needed.

Thus, the lubricating oil and the transportation air reach the bearings 16, 18, 20, 22,..., And the lubricating oil ensures the lubrication of each bearing. FIG.
Next, an example of the supply state of the lubricating oil to the bearing is conceptually shown with the bearing 16 as a representative example. As shown in FIG. 3, lubricating oil and transportation air are supplied from the oil supply pipe 60 into the housing of the bearing 16. A predetermined amount of the lubricating oil is stored in the housing as shown by oblique lines in FIG. 3 to ensure the lubrication of the bearing 16, and the surplus overflows from the oil drain pipe 62 to a discharge path 34 described later. On the other hand, the transport air flows into the housing from the oil supply pipe 60 and flows to the oil drain pipe 62. Note that reference numeral 12a in FIG.

Here, the lubricating oil supply system 10 of the present invention
, The discharge path 3 for discharging the lubricating oil (waste lubricating oil) supplied to each bearing and overflowing downstream
Are provided, and the waste lubricating oil is collected in a collecting tank 52 from a collecting line 51 to which each discharge path is connected. Further, pressure gauges 42, 44, 46, 48 for measuring the pressure of the transport air are provided in the respective discharge paths 34, 36,.
Are arranged, bearings 16, 18, 20, 22 ...
The air pressure of the transport air passing through is measured.

As described above, in a lubricating oil supply system for transporting lubricating oil by transport air, the lubricating oil adheres to the pipe wall of the transport pipe and travels along the pipe wall by the flow of transport air. Proceed downstream. Therefore, it can be considered that the lubricating oil is almost certainly supplied to the bearings 16, 18,... In a steady state if the transport air flows at a predetermined air pressure and flow rate to the bearings 16, 18,. .

In the lubricating oil supply system 10 of the present invention, discharge paths 34, 36 for discharging the lubricating oil and the transport air are formed in the bearings 16, 18,..., And the discharge paths 34, 36,. By arranging pressure gauges 42, 44, etc., and measuring the pressure and flow rate of the transport air,
The state of supply of lubricating oil to individual bearings can be monitored. For example, when the pressure of the pressure gauges 42, 44,... Decreases, it can be determined that the supply of the lubricating oil has stopped due to clogging of the transport pipe or disconnection (cutting) of the transport pipe upstream of the bearing. If the pressure rises, discharge path 3
It is possible to determine that the supply of the lubricating oil has stopped due to clogging or the like occurring at 4, 36...

According to the lubricating oil supply system 10 of the present invention, the bearing can always be operated in a good state, or even when the supply of the lubricating oil to the bearing is stopped, the lubricating oil can be supplied quickly. And can be easily found. Further, since the supply of the lubricating oil can be monitored for each bearing, it is possible to quickly and easily detect the location where the trouble has occurred. Therefore, it is possible to prevent troubles such as breakage of the bearing and stop of the roller due to the stop of the supply of the lubricating oil.

Therefore, the lubricating oil supply system of the present invention requires a large number of rollers and the like as in a continuous casting machine and a steel rolling mill, and is very effective in equipment using a large number of bearings. is there. In particular, in the secondary cooling zone of a continuous casting machine, when the slab support roller stops due to a bearing problem, not only the bearing damage and damage to the surface of the continuous cast piece, but also the occurrence of bulging due to it, Since this also leads to serious accidents such as breakouts, the effect of the present invention that can monitor the lubricating oil supply state for each bearing is enormous.

The method for measuring the pressure is not particularly limited, and any known means such as a method using a pressure gauge can be used. Alternatively, the flow rate of the transport air may be measured instead of the pressure. The flow rate measuring method is not particularly limited, and any known means can be used.

If necessary, pressure and / or flow rate measuring means may be provided in the transport pipe upstream of the bearing. With this configuration, it is possible to monitor the transportation state of the lubricating oil and the transportation air in the transportation pipe up to the bearing, and to more quickly detect the occurrence of the trouble and the location where the trouble has occurred. Especially when the transportation route of lubricating oil and transportation air is long,
The entire system can be easily monitored and more favorable results are obtained.

Although the lubricating oil supply system of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made without departing from the gist of the present invention. Of course it is good.

[0042]

As described above in detail, according to the lubricating oil supply system of the present invention, the lubricating oil supply state can be directly monitored for each of the bearings disposed in various facilities. When the supply of lubricating oil to the bearing is stopped, this can be quickly detected and the location of the trouble can be detected quickly, so that serious troubles such as bearing damage and roller stoppage can be prevented. Can be prevented. In addition, since the lubricating oil is transported by the transport gas, blockage of the transport pipe due to solidification of the grease and the like is extremely unlikely to occur in a system using only grease or lubricating oil.

[Brief description of the drawings]

FIG. 1 is a diagram conceptually showing a lubricating oil supply system of the present invention.

FIG. 2 is a diagram conceptually showing a state of transfer of lubricating oil in a lubricating oil supply system that transports lubricating oil by a transport gas.

FIG. 3 is a view conceptually showing an example of a supply state of lubricating oil in a bearing.

FIG. 4 is a diagram conceptually showing a conventional lubricating oil supply system.

[Explanation of symbols]

 Reference Signs List 10 Lubricating oil supply system 12, 14 Roller 16, 18, 20, 22 Bearing 24 Tank unit 26 Air unit 28 Mixer 30 First distribution valve 32 Second distribution valve 34, 36, 38, 40 Discharge path 42, 44, 46 , 48 Pressure gauge 60 Oil supply pipe 62 Oil drainage pipe

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-159892 (JP, A) JP-A-62-106196 (JP, A) JP-A-58-46293 (JP, A) JP-A-62-159 159891 (JP, A) Japanese Utility Model 3-4998 (JP, U) Japanese Utility Model 2-132198 (JP, U) Japanese Utility Model 2-125299 (JP, U) Japanese Utility Model 2-117499 (JP, U)

Claims (2)

(57) [Claims] 1. A lubricating oil supply system for supplying lubricating oil to a plurality of bearings, comprising: a lubricating oil supply source for supplying lubricating oil; a gas supply source for supplying a gas for transporting the lubricating oil; At least one mixer that makes the transportation path of the lubricating oil and the transportation gas supplied from the oil supply source and the gas supply source the same, and the lubricant and the transportation gas whose transportation path is made the same by the mixer. At least one distributor for distributing and supplying to each bearing, a discharge path for surplus lubricating oil disposed in each bearing, and a pressure and a pressure of the lubricating oil transport gas disposed in at least each discharge path. And / or a flow rate measuring means. 2. The lubricating oil according to claim 1, further comprising a lubricating oil distributor between the lubricating oil supply source and the mixer, and further comprising means for confirming the operation of the lubricating oil distributor and the mixer. Feeding system.