KR100904899B1 - Oil supply apparatus for large electromotor - Google Patents

Abstract

An oil supply device of a large motor is provided to reduce the size of a product by supplying the jack-up oil and the lubricating oil at the same time through a pair of oil supply units. A jack-up line oil supply unit(100) includes a multiple pump unit and two jack-up oil blocks(130). Two pumps(120) of the multiple pump unit are operated by a single actuator(110). The jack-up oil block includes a filter. The filter filters the oil pressed by the multiple pump unit. A lubricating line oil supply unit(200) includes a multiple pump unit, two lubricating oil blocks(230), a cooler(240), and a cooling oil block(250). The lubricating oil block includes the filter for filtering the oil pressed by the multiple pump unit. The cooler cools down the filtered oil. The cooling oil block discharges the cooled oil to the lubricating line.

Description

Oil supply apparatus for large electric motors

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device, and more particularly, to an oil supply device for a large electric motor, which enables the supply of jack-up and lubricating oil of a rotary shaft of a large electric motor at a time by a pair of oil supply units.

Generally, when a large motor such as a large motor, a pump or a generator is operated, the rotating shaft of the electric motor is slightly lifted by a hydraulic device, and then the rotating shaft is rotated.

This is because the self-weight of the large electric motor is very heavy, so a process of lifting the rotary shaft a little is necessary for the normal operation of the rotary shaft.

Such a device is called a jack up device, and supplying oil to the jack up device is called a jack up line.

In addition, lubricating oil must be supplied to the bearing supporting the rotating shaft, and in the case of the large motor as described above, a lubrication line for supplying lubricating oil is required.

At this time, the configuration of supplying the lubricating oil to the lift process or the bearing of the rotating shaft as described above is a well-known technique, detailed description thereof will be omitted.

Meanwhile, the conventional jack up line and the lubrication line are connected to four oil supply devices L-1, L-2, J-1, and J-2 to the rotating shaft 11 of the large electric motor 10 as shown in FIG. To supply oil for jack up and lubrication.

That is, the rotary shaft 11 may be divided into a load side rotating shaft 11a and its no load side rotating shaft 11b, and a jack-up line for lifting the rotating shaft 11a on one side of the load side rotating shaft 11a. The oil supply device J-1 and a lubrication line oil supply device L-1 for supplying lubrication oil of the bearing are provided to supply oil through the jackup line 21 and the lubrication line 31.

In addition, the same jack-up line oil supply device J-2 and lubrication line oil supply device L-2 as described above are provided on one side of the non-loading side rotating shaft 11b.

In this case, the oil supply device may include, for example, a pump for discharging the oil and a motor for driving the pump.

Conventionally, four or two pairs of oil supply devices were required for the lift and lubrication oil supply of the rotary shaft 11.

However, in the related art, as described above, two pairs of four oil supply devices are required, and thus, the size and overall weight of the product increase, and there is a problem of cost increase.

In addition, in the case of the conventional jack-up line or lubrication line, there is a problem in that leakage occurs in the pipe connection due to the need for complicated piping.

An object of the present invention is to provide an oil supply device for a large electric motor that can supply the jack-up and lubricating oil of the rotary shaft of the large electric motor at a time by a pair of oil supply units.

According to an aspect of the present invention, there is provided an oil supply apparatus including a jackup line for supplying oil to lift both sides of a rotating shaft of a large electric motor, and a lubrication line for supplying lubricating oil to a bearing supporting the rotating shaft. It further comprises a multiple pump having an actuator of the pump and a plurality of pumps driven by the actuator, characterized in that the oil supply device of a large electric motor for supplying oil to the jack-up line and the lubrication line by each of the pumps, respectively. .

In addition, the oil supply device comprising a jack-up line for supplying oil to lift both sides of the rotary shaft of the large electric motor and a lubrication line for supplying lubricating oil to the bearing for supporting the rotary shaft, wherein And a pair of jack-up line oil supply parts and a lubrication line oil supply part each supplying, wherein the jack-up line oil supply part includes a multiple pump unit driven by two pumps by a single actuator, and pressurized by each of the multiple pump units. A block for two jack-up oils having a filter for filtering oil and discharging oil to the jack-up line side, wherein the lubrication line oil supply unit includes a multiple pump unit driven by two pumps by a single actuator; Filter is provided to filter oil pressurized by multiple pump units Have different characteristics to the two lubricating oils block and the oil supply of a large electric motor of a cooler for cooling the filtered oil, a cooling oils block for discharging the cooling oil by the cooler toward the lubrication line device.

In this case, the block for the jack-up oil is a block body having a hexahedral shape, the filter is installed, the switch and the flow control valve is provided in the block body, and formed inside the block body to the filter, the switch and the flow control valve It is desirable to minimize the pipe connection, including a flow path for the oil to flow to prevent leakage of oil.

In the case of the cooling oil block, a block body having a hexahedron shape, a switch and a flow rate control valve installed in the block body, and a flow path formed inside the block body to allow oil to flow through the switch and the flow rate control valve. It is desirable to prevent leakage of oil, including.

Conventionally, two pairs of oil supply devices were required. However, the present invention as described above requires only one pair of supply devices, thereby reducing the size and overall weight of the product, thereby reducing the cost and installing the product. It has the effect of improving the ease of use and preventing the leakage of oil.

The oil supply apparatus for supplying oil to the jack-up line and the lubrication line as described above, the present invention comprises a multiple actuator having a single actuator and a plurality of pumps driven by the actuator, It is an oil supply device of a large electric motor which supplies oil to the jack up line and the lubrication line, respectively.

Conventionally, four or two pairs of oil supply devices were required for the lifting and lubrication oil supply of the rotating shaft as described above.

However, according to the present invention, the jack up and lubrication of the rotating shaft can be performed with only a pair of oil supply devices.

In this case, the actuator may be provided with one and two pumps driven by the actuator may be used to jack up the rotary shaft and supply oil for lubrication.

In other words, as described above, an oil supply device comprising a jack up line for supplying oil to lift both sides of a rotating shaft of a large electric motor, and a lubrication line for supplying lubricating oil to a bearing for supporting the rotating shaft, wherein the single actuator and And a pair of multiple pump units having two pumps driven by the actuator, supplying oil to the jack-up line-in by the one multiple pump unit while the lubrication line by the other multiple pump units Oil can be supplied.

Hereinafter will be described in more detail with reference to the accompanying drawings and embodiments.

Example

The oil supply device A to be described in this embodiment includes a jack-up line oil supply unit 100 and a lubrication line oil supply unit 200 as shown in FIGS. 2 and 3.

FIG. 2 is a conceptual diagram of one embodiment of the present invention, and FIG. 3 is a perspective view of an important part of the hydraulic circuit of this embodiment.

3 shows only the flow in one direction of the two-way flow of oil.

The jack-up line oil supply unit 100 filters a multiple pump unit P1 in which two pumps 120 are driven by a single actuator 110, and filters oil pressurized by each of the multiple pump units P1. It includes a filter 132 and two jack-up oil block 130 for discharging oil to the jack-up line 21 side.

In FIG. 2, the jack up oil block 130 is represented by a dotted line.

The multiple pump unit P1 refers to the driving of two pumps 120 by a single actuator 110. In this embodiment, a motor is used as the actuator and a gear pump is used as the pump 120. It was.

A so-called double gear pump is used as the multiple pump unit P1.

However, the actuator 110 is to drive the pump so that the oil is discharged, even if it is an actuator of a different type other than the motor as long as it achieves this purpose, all belong to the scope of the present invention.

On the other hand, the pump 120 in the present embodiment illustrates a gear pump, but the pump is to pressurize, transfer the oil as described above, as long as the pump to achieve this purpose, all other types of the present invention It belongs to the category.

Meanwhile, although the pump 120 is provided in the present embodiment, it is illustrated that the load side shaft 11a (see FIG. 1) and the unloaded shaft 11b (FIG. 1) of the rotary shaft 11 (see FIG. 1) are illustrated. It is clear that the scope of the present invention is not limited by the number of the pump as long as the object is achieved to pressurize and convey the oil.

On the other hand, the jack-up oil block 130 is provided with a filter 132 as described above to filter the oil pressurized by the multi-pump unit (P1), the oil is filtered to the jack-up line 21 side The discharge will be described later.

On the other hand, the jack-up line 21 is shown in two directions toward the left and right sides in FIG. 2, which shows the direction toward the load side shaft 11a and the unload side shaft 11b of the rotating shaft 11 described in FIG. 1, respectively. It is.

Meanwhile, the lubrication line oil supply unit 200 includes a multiple pump unit P2 in which two pumps are driven by a single actuator, and a filter 232 for filtering oil pressurized by each of the multiple pump units P2. The apparatus includes two block 230 for lubricating oil, a cooler 240 for cooling the filtered oil, and a block for cooling oil 250 for discharging oil cooled by the cooler to the lubrication line side.

Since the multiple pump unit P2 includes a single actuator 210 and two pumps 220 similarly to that of the jack-up line oil supply unit 100, the detailed description thereof will be omitted.

Meanwhile, the lubricating oil block 230 is also the same as described above in that the filter 232 is provided and the filtered oil is discharged as described above.

The cooler 240 is for cooling the oil filtered by the lubricating oil block 230, and any method such as air cooling or water cooling may be used for the cooling.

However, in the present embodiment, a water cooling type is preferable in which cooling water flows for rapid cooling because it is used in a large electric motor.

To this end, a configuration in which cooling water is introduced and discharged to one side of the cooler should be provided, and detailed description thereof will be omitted since such a cooling configuration is widely known.

On the other hand, in the present embodiment, the cooler 240 is installed in each of the respective lubricating oil blocks 230, illustrating the case where two are installed.

However, the cooler 240 is intended to cool the oil as described above, it is obvious that the present invention is not limited by the number as long as this object is achieved.

Meanwhile, the oil cooled by the cooler 240 is discharged to the lubrication line via the cooling oil block 250. The cooling oil block 250 includes a block body 251 having a hexahedron shape, and the block body. And a flow rate control valve 253 provided at 251 and a flow path (not shown) formed in the block body 251 to allow oil to flow into the flow rate control valve 253.

The above-described flow rate control valve 253 and various gauges are provided in the block body 251 to reduce the number of pipe connections to prevent leakage.

That is, unlike the present invention, there is a concern that oil leakage may occur at the pipe connection because each switch or valve is connected by a pipe connection. However, the present invention eliminates this concern by the block configuration as described above. It becomes possible.

In the present embodiment, the block main body 251 is provided with a hexahedral shape.

However, the block body 251 has a flow path therein as described above, and aims to mount the flow control valve 253. As long as the object is achieved, other shapes, for example, a hexahedron Of course, even if the shape of the spherical and the like all belong to the scope of the present invention.

In addition, in the present embodiment, the pressure gauge 254 and the thermometer 255 are installed in the block 250 for the cooling oil, so that the pressure and the temperature that are currently operating can be checked in real time.

The configuration of the cooling oil block 250 is similar to the block 130 for jack-up oil.

That is, the jack-up oil block 130 may include a block body 131 having a hexahedron shape in which the filter 132 is installed, a switch 135 and a flow control valve 136 installed in the block body 131, It is formed in the block body 131 includes a filter (132), a flow path (not shown) for the oil to flow to the switch 135 and the flow control valve 136.

On the other hand, the switch 135 is used to control the flow of the flow rate it is preferable to use a pressure switch.

The pressure switch interrupts the flow of the flow rate according to the pressure of the fluid to be applied, and includes a high low pressure pressure switch and a hydraulic protective pressure switch.

The high and low pressure switch is a combination of a high pressure cut-off and a low pressure cut-off, each of which is independent and only the contact portion is collected in one place. Therefore, two sets of bellows, lever and contact adjusting screw are provided.

For example, when the discharge pressure is abnormally high or the suction pressure is abnormally low by the high and low pressure switch, the contact is interrupted to interrupt the operation of the actuator to interrupt the flow of the flow.

On the other hand, the hydraulic protection switch refers to a switch that stops the operation of the actuator by disconnecting the contact when the hydraulic pressure falls below a pressure within a certain degree within a certain time.

Although a plurality of such pressure switches are provided, it is possible to safely protect the hydraulic circuit of the present invention by variously adjusting the threshold pressure value (pressure value for breaking the contact point) of the pressure switch, and in the present embodiment, two such pressure switches are provided. Device.

In addition, since the block body 131 and the flow control valve 136 are similar to the case of the block 250 for cooling oil described above, a detailed description thereof will be omitted.

On the other hand, in this embodiment, it is illustrated that the filter 132 is provided on the front surface of the block main body 131.

However, the filter 132 is intended to filter oil, and as long as this object is achieved, it is obvious that all of the filters 132 belong to the present invention.

Meanwhile, the filter 132 may further include a check valve CV and a relief valve 134 on one side.

The check valve CV is to prevent the back flow of the fluid as is widely known, it is preferable to prevent the back flow of the oil is installed on one side of the filter 132.

In addition, by installing a relief valve 134 on one side of the filter 132, when the filter 132 is clogged or the oil pressure abnormally rises for other reasons, it is preferable to drain the oil to protect the hydraulic circuit of the present invention. Do.

Such a relief valve and a check valve may be installed on one side of the filter 232 of the block 230 for lubricating oil described above.

With the oil supply device of the present invention as described above, jack-up and lubrication of the rotating shaft can be enabled by only a pair of oil supply devices.

In addition, the block 230 for lubricating oil is similarly a block body 231 having a hexahedron shape in which the filter 232 is installed, a switch 233 installed in the block body 231, and the block body 231. And a flow path formed inside the filter to allow oil to flow toward the filter 232 and the switch 233.

Meanwhile, it is also preferable to circulate and reuse the oil.

That is, a part of the oil via the rotary shaft 11 or the bearing is re-injected into the jack-up line oil supply unit 100, while the remaining oil is re-injected into the lubrication line oil supply unit 200 to circulate and re-enable the oil. It is preferable to use in terms of cost reduction.

To this end, the first suction line 310 is installed on the load side shaft 11a and the no load side shaft 11b of the rotary shaft 11 and connected to each pump 120 of the jack up line oil supply unit 100. Third suction lines branched from the second suction line 320, the first suction line 310 and the second suction line 320, respectively, and connected to the respective pumps 220 of the lubrication line oil supply unit 200. It is also possible to further include 330 and the fourth suction line 340, to recycle the oil through the respective suction lines (310, 320, 330, 340).

In this case, the oil sucked through the first suction line 310 and the second suction line 320 is separately input to each pump 120 of the jack-up line oil supply unit 100, and then the load-side shaft 11a ) And the oil discharged through the jack-up line 21 of the no-load side shaft 11b and sucked through the third and fourth suction lines 330 and 340 are pumps 220 of the lubrication line oil supply unit 200. Jacks and lubrication lines 31 which are separately inputted to the lubrication line 31 and discharged to the lubrication line 31 on the load side shaft 11a and the unloaded shaft 11b side and connected to the load side shaft 11a side. It is also preferable to prevent the oil flowing through) and the oil flowing through the jack-up line 21 and the lubrication line 31 connected to the no-load side shaft 11b from intermixing with each other.

This is because the pressure applied to the load side shaft 11a and the unloaded shaft 11b of the rotary shaft 11 is different from the oil passing through the load side shaft 11a side and the unloaded side shaft 11b side. When oil is mixed, pressure fluctuations may occur and damage to the hydraulic circuit components involved may be prevented.

Meanwhile, in FIG. 2, the components of the present invention described above are shown, and the piping structure for oil flow between the components is not shown.

This is not illustrated because the piping structure is a well known technique.

Meanwhile, FIG. 3 shows that some relief valves have not been described.

That is, the relief valves of the reference numerals V1 and V2 are installed before and after the pump 120 of the jack-up line oil supply unit 100, and when the pressure above the designed value acts to protect the circuit by draining them.

This is the same also in the case of the reference numerals V3 and V4, detailed description thereof will be omitted.

The operation of supplying oil to the rotating shaft 11 of the large-sized electric motor by the oil supply device of the present invention as described above will be described.

First, oil is sucked through the first and second suction lines 310 and 320.

The sucked oil flows through the pump 120 and the block 130 for the jack-up oil and flows through the jack-up line 21 toward the load side shaft 11a and the unloaded shaft 11b of the rotary shaft 11.

Meanwhile, the third and fourth suction lines 330 and 340 branched from the first and second suction lines 310 and 320 are introduced into the pump 220 side of the lubrication line oil supply unit 200, and the lubricating oil block 230 and After passing through the cooler 240 and the block 250 for the cooling oil, the lubrication line 31 flows to the load side shaft 11a and the unload side shaft 11b of the rotary shaft 11.

The oil introduced into the rotary shaft 11 through the jack up line 21 and the lubrication line 31 is sucked back through the first and second suction lines 310 and 320.

1 is a conceptual diagram of an oil supply method of a conventional jack up and lubrication line,

2 and 3 are conceptual views showing the oil supply apparatus and method according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: large electric motor 11: a rotating shaft

11a: load side shaft 11b: no load side shaft

L: Lubrication Line Oil Supply J: Jack Up Line Oil Supply

110,120,130,140: Lubrication Line

200, 210,220: Jack Up Line

310,320,330,340: 1, 2, 3, 4 suction line

Claims (9)

An oil supply device comprising a jackup line for supplying oil to lift both sides of a rotating shaft of a large electric motor, and a lubrication line for supplying lubricating oil to a bearing supporting the rotating shaft. It further comprises a multiple actuator having a single actuator and a plurality of pumps driven by the actuator, Oil supply device for a large electric motor, characterized in that for supplying oil to the jack-up line and the lubrication line by the respective pumps. An oil supply device comprising a jackup line for supplying oil to lift both sides of a rotating shaft of a large electric motor, and a lubrication line for supplying lubricating oil to a bearing supporting the rotating shaft. Further comprising a pair of multiple pump units having a single actuator and two pumps driven by the actuator, The oil supply device for a large electric motor, characterized in that the oil is supplied to the jack-up line-in by the one multiple pump unit while the oil is supplied to the lubrication line by the other multiple pump unit. An oil supply device comprising a jackup line for supplying oil to lift both sides of a rotating shaft of a large electric motor, and a lubrication line for supplying lubricating oil to a bearing supporting the rotating shaft. Further comprising a pair of jack-up line oil supply and lubrication line oil supply for supplying oil to the jack-up and lubrication line, respectively, The jack-up line oil supply unit includes a multiple pump unit driven by two pumps by a single actuator, and a filter for filtering oil pressurized by each of the multiple pump units, while two jacks for discharging oil to the jack-up line side. A block for jack up oil, The lubrication line oil supply unit includes two pump units for driving two pumps by a single actuator, two lubricating oil blocks equipped with a filter for filtering oil pressurized by each of the multiple pump units, and the filtered oil. And a cooler for cooling the cooling oil and a cooling oil block for discharging oil cooled by the cooler to the lubrication line side. The method of claim 3, The block for jack-up oil includes a block body having a hexahedron shape in which the filter is installed, a switch and a flow control valve installed in the block body, and formed inside the block body to flow oil into the filter, the switch, and a flow control valve. An oil supply device for a large electric motor, characterized in that it comprises a flow path to be made.  The method of claim 3, The cooling oil block includes a block body having a hexahedron shape, a flow control valve installed in the block body, and a flow path formed inside the block body to allow oil to flow to the flow control valve. Oil supply of the electric motor.  The method of claim 3, A part of oil passing through the rotating shaft or bearing is re-injected to the jack-up line oil supply, while the remaining oil is re-injected to the lubrication line oil supply to circulate and reuse the oil. Device. The method of claim 3, First and second suction lines installed on the load side shaft and the no load side shaft of the rotary shafts and connected to the respective pumps of the jack up line oil supply unit; And a third suction line and a fourth suction line branched from the first suction line and the second suction line, respectively, and connected to the respective pumps of the lubrication line oil supply unit. The oil sucked through the first and second suction lines is separately introduced into each pump of the jack up line oil supply unit, and then is separately discharged to the jack up lines of the load side shaft and the no load side shaft. The oil sucked through the third and fourth suction lines is separately introduced into each pump of the lubrication line oil supply unit, and is separately discharged into the lubrication lines on the load side shaft and the no load side shaft side, The oil supply device for a large electric motor, wherein the oil flowing through the jack-up line and the lubrication line connected to the load side shaft side and the oil flowing through the jack-up line and the lubrication line connected to the non-load side shaft side are not mixed with each other. The method of claim 3, The oil supply device for a large electric motor, characterized in that it further comprises a check valve and a relief valve provided on one side of each filter. The method of claim 3, The block for lubricating oil includes a block body having a hexahedron shape in which the filter is installed, a switch installed in the block body, a filter formed inside the block body, and a flow path for oil to flow to a switch side. Oil supply device for large electric motors.

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