JP2531224Y2 - Lubricating oil changing device for vertical mill rollers - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil changing device for a vertical mill roller in which a used lubricating oil in a roller bearing is replaced with a new lubricating oil by using a lubricating oil changing unit having a portable structure.

[0002]

2. Description of the Related Art A roller of a vertical mill is provided with a roller bearing on a roller shaft, and the roller bearing is lubricated by oil bath lubrication using a lubricating oil. Dispersion and absorption of impact pressure, prevention of rust generation, cleaning of foreign substances, etc. are performed. In addition, since the rollers are heated during the operation of the vertical mill and the high-temperature gas is introduced, the lubricating oil that lubricates the roller bearings in the oil bath is lubricated at elevated temperatures for a long time. When used, the properties are deteriorated, so the deteriorated used lubricating oil is replaced with new lubricating oil, and the operation of the vertical mill is continued.

[0003] In a vertical mill operated under the introduction of a high-temperature gas, the deterioration of properties progresses quickly, so that the frequency of replacing the lubricating oil tends to increase.

[0004] Conventionally, it has been known that the roller bearing portion of a vertical mill is lubricated by oil bath lubrication (Ger Schneider Aufveriteung-Technik 537, 1971).

In this type of roller bearing, an oil bath having a hermetically sealed structure is formed in the roller bearing inside the roller, and the lubricating oil charged in the oil bath with the rotation of the roller bearing. With this, the oil bath is lubricated. When the used lubricating oil is replaced with new lubricating oil, the operation of the vertical mill is stopped, the interior is released, the rollers are disassembled, and the lubricating oil is replaced.

[0006]

However, in the conventional structure described above, when the used lubricating oil is replaced with new lubricating oil, after stopping the operation of the vertical mill, the inside of the mill is released and the rollers are disassembled. Since the replacement of the lubricating oil is performed, the above replacement work is also complicated, the working environment is not good, a lot of time is consumed for replacement, and the operation of the boiler or the like may be stopped, which is not preferable. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to deteriorate the properties of lubricating oil which lubricates the inside of a roller bearing with an oil bath due to long-time operation of a vertical mill. When replacing the used lubricating oil with new lubricating oil, connect the lubricating oil changing unit with a portable structure to the end of the roller shaft so that the used lubricating oil in the roller bearing and the new lubricating oil in the changing unit And to obtain a lubricating oil changing device for a vertical mill roller which can exchange lubricating oil without stopping the operation of the vertical mill.

[0008]

In order to achieve the above object, according to the present invention, an oil supply pipe to the roller bearing and a return pipe from the bearing are provided at the roller shaft end of the roller bearing to be oil-bath lubricated. The end of the oil supply pipe and the end of the return pipe are respectively connected to a connection portion of a lubricating oil exchange unit in a detachable manner, and the exchange unit is connected to the lubrication oil supply tank via an oil supply pump through an oil supply pump. An oil supply line connected to the oil supply line and a return line for discharging used lubricating oil from the return line to the outside through the return pump and the measuring tank are provided,
The present invention is characterized in that used lubricating oil in a roller bearing is replaced with lubricating oil in an oil supply tank.

[0009]

In this way, when the vertical mill is operated for a long time, the properties of the lubricating oil that is lubricating the inside of the roller bearings with the oil bath are deteriorated, and the used lubricating oil is replaced with a new lubricating oil. The transportable lubricating oil replacement unit is connected to the roller shaft end to guide the new lubricating oil in the replacement unit to the roller bearings and return the used lubricating oil in the roller bearings to the replacement unit. Lubricating oil can be exchanged without discharging the system to the outside and stopping the operation of the vertical mill, which facilitates the above-mentioned exchange work, and effectively consumes exchange time and lowers the working environment. Can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of a lubricating oil changing device for a vertical mill roller according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of the lubricating oil changing unit.

1 and 2, a vertical mill 10 includes a plurality of rollers 16 provided on a rotary table 12. The rotary table 12 is mounted on a speed reducer 14 driven by a drive source (not shown). And rotated at low speed. The roller 16 has a roller shaft (not shown) and a roller bearing 17 inside. The roller shaft is mounted on a mounting member 18, and the upper end of the mounting member 18 is subjected to a pressing force by a pressurizing means 20 mounted on a casing 19, and the mounting member 18 is rotated around a support shaft 21 at the lower end of the mounting member 18. Is rotated, and the roller 16 is turned on the rotary table 12.
It is designed to be pushed down. The material fed from the coal feeder 26 is pulverized between the rotary table 12 and the rollers 16 under the introduction of hot gas, and the pulverized material is moved up the pulverizing chamber 28 to be classified. Only the fine powder classified by the means 30 is transported as fuel to the boiler by a transport pipe from an opening 34 provided at the outlet of the distributor 32.

The coarse particles classified by the classification means 30 fall into the pulverizing chamber 28 and, together with the supplied material,
The powder is pulverized between the rotary table 12 and the roller 16 and the closed circuit pulverization is repeatedly performed to obtain fine powder as described above.

The roller 16 has a roller shaft and a roller bearing portion 17 which are hermetically sealed by a cover material and a bearing material. An oil bath is formed in a lower space of the hermetically sealed structure so that lubricating oil is retained therein. As the roller 16 rotates, the roller bearing portion 17 is lubricated with the lubricating oil in an oil bath.
The charging of the lubricating oil into the oil bath can be performed by operating a lubricating oil changing unit 50 described later.

An oil supply pipe 24 to the roller bearing 17 and a return pipe 24 from the roller bearing are provided at the end of the roller shaft. The oil supply pipe 24 has a connection pipe 27 having a stop valve 23. The return pipe 24 is connected to the connection sections 63 and 65 of the exchange unit 50 via connection pipes 29 each having a stop valve 25.
Each is detachably connected. Replacement unit 50
Has a lubrication tank 52 for storing and supplying new lubricating oil.
Oil supply pump 5 for supplying lubricating oil in oil supply tank 52
4 and the like, a return pump 68 for returning used lubricating oil from the return pipe 24, and a return line 64 including a measuring tank 70 for measuring used lubricating oil and the like. ing. The refueling pump 54 and the return pump 68 are connected to an air motor 76 and an air motor 78, respectively, and the air from the air line 80 drives the air motors 76 and 78 via a valve 82, respectively.

The oil supply line 62 is provided with a filter 56 on the downstream side of the oil supply pump 54.
Is provided. The shut-off valve 60 is opened and closed by an operation using compressed air from the air line 80.

The return line 64 is provided with a connecting portion 65 at the end, a flow site 66 on the upstream side of the return pump 68, and the measuring tank 70 on the downstream side. During operation of the lubricating oil changing unit 50, the measuring tank 70 visually or by a sensor 80 detects the flow balance between the new lubricating oil flow rate in the oil supply pipe 62 and the used lubricating oil flow rate in the return pipe 64, and further detects the flow rate. The occurrence of unbalance can be monitored, and the occurrence of flow unbalance can be communicated by an alarm or the like.

A pipe 72 is provided below the measuring tank 70, and the used lubricating oil is discharged out of the system through the pipe 72.
Accepted in another container or the like.

The fuel supply line 62 is provided with switching valves 74 and 75, and the lines 77 and 79 are switched by switching the switching valves 74 and 75.
At the same time, the internal circulation of the oil supply line 62 and the return line 64 is performed via the measuring tank 70, so that the flow rate of the lubricating oil at the start of the operation of the replacement unit 50 can be adjusted.

Next, the operation will be described.

When the properties of the lubricating oil for lubricating the inside of the roller bearing portion 17 with the oil bath deteriorate with the long-time operation of the vertical mill 10, and the used lubricating oil is replaced with new lubricating oil, the lubricating oil is replaced. The unit 50 is disposed adjacent to the vertical mill 10, and the connection 63 of the connection pipe 27 of the oil supply pipe 22 of the vertical mill 10 and the connection 65 of the connection pipe 29 of the return pipe 24 are connected to the oil supply pipe of the exchange unit 50. The oil supply pump 54 and the return pump 68 are driven by the operation of the compressed air in the air line 80, and the shut-off valve 60 is connected to the connection portion 63 of the cylinder 62 and the connection portion 65 of the return line 64. It is opened. The new lubricating oil in the oil supply tank 52 is supplied from the oil supply line 62 to the roller bearing 1 via the oil supply tube 22.
The used lubricating oil supplied and introduced to the roller bearing portion 17 at a sufficient flow rate and charged into the roller bearing portion 17 is replaced with the above-mentioned new lubricating oil, and is returned from the return pipe 24 via the return line 64. It reaches the measuring tank 70, is discharged out of the system via the pipe 72, and the used lubricating oil is collected. Since the lubricating oil flow rate is measured by the measuring tank 70, the drive of the shut-off valve 60, the oil supply pump 54 and the return pump 68 is stopped after the measurement of the amount of new lubricating oil to be charged into the roller bearing portion 17 and the charging are completed. Then, the connection portions 63 and 65 are detached and attached together with the closing operation of the valves 23 and 25, and the replacement of the lubricating oil of one roller 16 is completed.

Next, the roller bearing 1 of the other roller 16
In order to change the lubricating oil in the vertical mill 10, all the rollers 1 of the vertical mill 10 are sequentially and repeatedly performed.
The change of the lubricating oil for 6 is completed.

The above-mentioned replacement of the lubricating oil can be performed without stopping the operation of the vertical mill, so that the above-mentioned replacement work can be facilitated, and further, the replacement time can be shortened, and the working environment can be reduced. Can be prevented from decreasing.

[0024]

[Effects of the Invention] As described above, according to the present invention,
If the properties of the lubricating oil that is lubricating the inside of the roller bearings with the long-term operation of the vertical mill deteriorate and the used lubricating oil is replaced with new lubricating oil, a lubricating oil replacement unit with a portable structure must be installed. Connected to the end of the roller shaft, the used lubricant in the roller bearing and the new lubricant in the replacement unit can be replaced, and the lubricant can be replaced without stopping the operation of the vertical mill. The replacement work can be facilitated, the replacement time can be shortened, and the working environment can be prevented from being lowered.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vertical mill roller lubricating oil changing device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of the lubricating oil changing unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vertical mill 17 Roller bearing part 22 Oil supply pipe 24 Return pipe 50 Lubricating oil exchange unit 52 Oil supply tank 54 Oil supply pump 62 Oil supply pipe 64 Return pipe 68 Return pump 70 Measuring tank

Claims (1)

(57) [Scope of request for utility model registration] An oil supply pipe to the roller bearing and a return pipe from the bearing are provided at an end of the roller shaft of the roller bearing to be lubricated with the oil bath, and the ends of the oil supply pipe and the return pipe are lubricated. Each of the oil exchange units is detachably connected to a connection portion of the oil exchange unit, and the exchange unit is connected to an oil supply pipe connected to an oil supply pipe via an oil supply pump from an oil supply tank for supplying lubricating oil, and used from a return pipe. A return line for discharging used lubricating oil to the outside of the system via a return pump and a measuring tank, and replacing used lubricating oil in the roller bearings with new lubricating oil in the oil supply tank. Lubricating oil exchange device for mill rollers.