JP2020020432A - Grease supply device and wind power generation system using the same - Google Patents

Abstract

To provide a grease supply device in which an increase in the number of movable parts to be maintained is suppressed as much as possible, and dischargeability of old grease and suppliability of new grease is increased, which therefore increase replaceability of grease in a rotary machine, and to provide a wind power generation system using the grease supply device.SOLUTION: The grease supply device of the present invention, comprises: a grease temperature detection part detecting the grease temperature inside a rotary machine; a grease supply mechanism having a force-feeding part adjusting the supply amount of grease to be supplied to the rotary machine and temperature adjustment part adjusting the temperature of grease to be supplied to the rotary machine; and a grease supply mechanism control device instructing the temperature and supply amount of grease to be supplied to the rotary machine with respect to the temperature adjustment part and the force-feeding part based on the grease temperature detected by the grease temperature detection part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fat and oil supply device and a wind power generation system using the same.

  Japanese Patent Application Laid-Open No. 2013-228063 (Patent Document 1) is a background art of the present technical field. This gazette describes a grease supply system for a rolling bearing. The grease supply system includes a discharge unit for forcibly discharging grease from the rolling bearing, a discharge measurement unit for measuring a discharge amount of grease, and a discharge amount. A replenishing amount setting unit that sets a grease replenishing amount based on the grease discharge amount measured by the measuring unit, and a replenishing unit that automatically replenishes the rolling bearing with the set replenishing amount of grease. Is described.

JP 2013-228063 A

  The grease supply system described in Patent Document 1 describes that grease is forcibly discharged from a rolling bearing by a discharge portion, and a screw pump is used in the discharge portion.

  That is, in the grease supply system described in Patent Document 1, it is necessary to add a movable part to be maintained, such as a screw pump.

  Accordingly, the present invention provides an oil and fat supply device that minimizes the number of movable parts to be maintained as much as possible, improves the drainage of old oil and fat, increases the supply of new oil and fat, and improves the exchangeability of oil and fat in a rotary machine. A wind power generation system using the same is provided.

  In order to solve the above problems, a fat and oil supply device of the present invention includes a fat and oil temperature detecting unit that detects a temperature of fat and oil inside a rotating machine, a pressure feeding unit that adjusts a supply amount of fat and oil to be supplied to the rotating machine, A temperature control unit that adjusts the temperature of the fat or oil supplied to the machine, and a fat or oil supply mechanism having a temperature control unit and a pressure feeding unit based on the temperature of the fat or oil detected by the fat or oil temperature detection unit. A fat / oil supply mechanism control device for instructing the temperature of the supplied fat / oil and the supply amount of the fat / oil.

  Further, the wind power generation system of the present invention has such a fat and oil supply device.

  ADVANTAGE OF THE INVENTION According to this invention, the addition of the movable part which becomes a maintenance object is refrained as much as possible, the oil-fat supply apparatus which improves the discharge property of old oil-fat, improves the supply property of new oil-fat, and improves the exchangeability of the oil-fat in a rotary machine And a wind power generation system using the same.

  Problems, configurations, and effects other than those described above will be apparent from the following description of the embodiments.

It is an overall view showing the appearance of a wind power generation system. FIG. 2 is an explanatory diagram illustrating a fat and oil supply device according to the first embodiment. FIG. 8 is an explanatory diagram illustrating an oil and fat supply device according to a second embodiment. FIG. 13 is an explanatory diagram illustrating a fat and oil supply device according to a third embodiment.

  Preferred embodiments for implementing the present invention will be described below with reference to the drawings. The embodiments described below are merely examples, and are not intended to be construed as being limited to specific embodiments of the present invention. In addition, the same components are denoted by the same reference numerals, and in cases where they are duplicated, the description thereof may be omitted.

  FIG. 1 is an overall view showing the appearance of the wind power generation system.

  Wind power generation systems are being widely adopted as a pillar of renewable energy.

  Generally, a wind power generation system has a rotor 2 provided with a blade 1 on an upper part of a tower 4 and a nacelle 3 provided with a gearbox (not shown) and a generator (not shown), and rotates. The rotating power of the rotor 2 is transmitted to a generator (not shown) to generate power.

  The wind power generation system includes a blade 1 and a rotation support mechanism (not shown) for the rotor 2, a driving device (not shown) for the blade 1, a speed increaser (not shown), a generator (not shown), a driving mechanism for the nacelle ( (Not shown).

  Rolling bearings are mainly used to support the rotating parts of these rotating machines, and most of them are lubricated with oils and fats. In particular, grease, which is a semi-solid lubricant, is often used for fats and oils. In this embodiment, grease is used as a specific example of fats and oils.

  Grease is used in rotating machines, and as time goes by, oil content comes off and deterioration progresses. Alternatively, contamination proceeds due to reaction products such as oxides, wear particles, and the like.

  Therefore, in this embodiment, such deteriorated and contaminated grease causes wear and damage of the bearings and gears inside the rotating machine and becomes a factor of shortening the service life. Is replaced with new grease (or additional grease is additionally supplied). This prevents damage to bearings and gears inside the rotating machine, and maintains the rotating machine in an appropriate state.

  In addition, grease exchange work by disassembling or dismantling a rotating machine requires a predetermined number of working days.For example, in a wind power generation system, a place where frequent access by workers at high places or at sea is difficult. Replacement work.

  Therefore, in this embodiment, the discharge of old grease and the supply of new grease are realized without performing the disassembly and disassembly of the rotating machine.

  In the present embodiment, the oil supply device is used for a wind power generation system. That is, the wind power generation system described in the present embodiment includes the rotor 2 including the blade 1 that rotates by receiving wind, the nacelle 3 that supports the load of the rotor 2, and the tower 4 that supports the nacelle 3. The oil supply device is installed, for example, inside the nacelle 3.

  FIG. 2 is an explanatory diagram illustrating the oil and fat supply device according to the first embodiment.

  FIG. 2 shows a rotating machine (part) of a wind power generation system and a fat and oil supply device. The oil supply device shown in FIG. 2 is installed inside the nacelle 3 shown in FIG.

  The rotating machine 5 of the wind power generation system supports a rotating shaft 6 with a bearing 7. The bearing 7 is a rolling bearing.

  Above the rotary machine 5 is an oil supply port 8, and below the rotary machine 5 is an oil outlet 10. The grease supply mechanism 14 is connected to the grease supply port 8 to supply grease to the rotating machine 5. The grease supplied to the oil supply port 8 passes through the inside of the rotary machine 5 and reaches the bearing 7. There is a space around the bearing 7 called a grease reservoir 9, and grease accumulated in the grease reservoir 9 passes through the inside of the rotary machine 5 and is discharged to the outside from the grease discharge port 10.

  The grease supplied to the rotary machine 5 from the oil supply port 8 lubricates the bearing 7 and is discharged to the outside from the oil discharge port 10 via the oil storage 9.

  New grease supplied from the oil supply port 8 located above the rotary machine 5 is supplied to the bearing 7. The old grease existing in the bearing 7 and the grease reservoir 9 is pushed out by the new grease and is discharged from the grease discharge port 10 located below the rotary machine 5. The discharged old grease is temporarily stored and discarded during periodic inspections of the wind power generation system.

  In this embodiment, new grease supplied from above is changed in the axial direction of the rotating shaft 6 and is supplied to the bearing 7 along the axial direction of the rotating shaft 6.

  The oil supply mechanism 14 includes a tank 11 for storing grease, a pumping unit 12 such as a pump for pumping grease, and a temperature adjusting unit 13.

  The oil supply device described in the present embodiment includes an oil supply mechanism 14, an oil temperature detection unit 15 that detects the temperature of grease inside the rotary machine 5, and a rotation speed detection unit 16a that detects the rotation speed of the rotary machine 5. And a control unit 17 for controlling the supply of oil and fat.

  The fat / oil supply mechanism control device 17 controls the fat / oil supply operation based on a preset fat / oil supply timing (once / day, once / week, etc.).

  Further, the fat and oil supply operation may be controlled based on a fat and oil supply command (not shown) from the outside. The oil supply command from outside refers to, for example, a case where a sound larger than normal or a vibration larger than normal is detected from the rotating shaft 6 or the bearing 7, a case where the oil temperature detection unit 15 detects a temperature higher than normal, and Includes a case where an operator who is remotely operating instructs supply of grease.

  The oil temperature detection unit 15 has, in particular, a temperature sensor, which is installed in the bearing 7 and the oil sump 9 and directly or indirectly detects the temperature of grease inside the rotary machine 5. In particular, it is preferable that this temperature sensor be installed in the bearing 7 and the oil reservoir 9 on the oil outlet 10 side. This is because the temperature of old grease can be detected more accurately. In addition, the temperature sensor may be installed in another portion of the rotating machine 5 and directly or indirectly detects the temperature of grease inside the rotating machine 5.

  Then, the oil / fat temperature detection unit 15 transmits the detected temperature to the oil / fat supply mechanism control device 17.

  The rotation speed detecting means 16a directly or indirectly detects the rotation speed of the rotary shaft 6 in the rotary machine 5, and transmits the detected rotation speed to the oil supply mechanism control device 17.

  In this embodiment, the rotation speed of the rotation shaft 6 is detected by a rotation speed detection sensor (not shown) installed near the rotation shaft 6, and the rotation speed is detected by the rotation speed detection means 16a based on the detected rotation speed. The rotation speed of the shaft 6 is calculated.

  The grease stored in the tank 11 is supplied to a temperature control unit 13 having a heater via a pipe by a pressure feeding unit 12 communicating with the tank 11. The grease whose temperature has been adjusted by the temperature adjusting unit 13 is supplied from the oil supply port 8 to the inside of the rotary machine 5.

  The grease supply mechanism controller 17 adjusts the grease temperature when the grease temperature inside the rotary machine 5 is lower than a predetermined temperature based on a grease supply timing set in advance or a grease supply command from the outside. Order to increase.

  That is, the oil / fat supply mechanism control device 17 causes the temperature adjustment unit 13 to increase the grease temperature, or the pressure feeding unit 12 to increase the grease supply amount, or the rotating machine control device 16 to send the rotating shaft 6 Command to increase the rotation speed of. In addition, you may implement these in combination.

  The rotating machine control device 16 controls the rotation speed of the rotating shaft 6 detected by the rotation speed detecting means 16a. Normally, the pitch of the blade 1 (see FIG. 1) is controlled, and when the rotation speed is desired to be increased, the blade is controlled to the fine side. In this embodiment, if the temperature (A) of grease inside the rotary machine 5 detected by the oil temperature detection unit 15 is low when discharging old grease or supplying new grease, When it is determined, the rotation speed of the rotating shaft 6 is increased by the rotating machine control device 16 to increase the temperature of the grease inside the rotating machine 5.

  When increasing the supply amount of grease, the temperature of grease is increased and the supply amount of grease is increased. That is, the supply amount of grease for increasing the temperature is increased.

  When supplying and discharging grease, the temperature of the grease is preferably equal to or higher than a measured value (the temperature detected by the oil temperature detection unit 15), and is preferably 130 ° C to 180 ° C at the maximum. On the other hand, the temperature of grease inside the rotary machine 5 due to frictional heat or the like generated by the operation of the rotary machine 5 is 50 ° C. to 80 ° C. Therefore, the heating of the grease in the temperature control unit 13 is extremely effective.

  It should be noted that a command to the temperature control unit 13 as to how much the grease temperature should be raised or a command to the pumping unit 12 as to how much grease should be supplied (how much supply amount). Is determined in consideration of the operating state and the environmental state of the wind power generation system.

  When increasing the rotation speed of the rotating shaft 6, the temperature of the grease is increased by increasing the internal temperature of the rotating machine 5 by utilizing the frictional heat generated by the operation of the rotating machine 5.

  The oil supply mechanism control device 17 described in the present embodiment is configured to control the temperature control unit 13 and the pressure feeding unit 12 based on the rotation speed of the rotary machine 5 detected by the rotation speed detection unit 16a that detects the rotation speed of the rotary machine 5. , The temperature of the grease supplied to the rotary machine 5 and the supply amount of the grease are commanded.

  That is, if the rotation speed of the rotary machine 5 is higher or lower than a predetermined rotation speed range at the time of supplying grease, the grease supply mechanism controller 17 commands the rotary machine controller 16 to supply grease. The rotation speed is controlled to be suitable for the supply of water. When the rotation speed of the rotating machine 5 becomes suitable for supplying grease, the grease supply mechanism control device 17 supplies grease to the rotating machine 5.

  In the case of a wind power generation system, the rotation speed suitable for supplying grease is preferably in a range of a predetermined rotation speed, and for example, a rotation speed lower than 1/2 of the rated rotation speed is preferable. This is to prevent the supply and discharge of grease from applying an extra load to the rotating shaft 6 and the bearing 7. When the supply and discharge of grease are assumed, the rotation speed is preferably 1 rpm (one rotation per minute) or more. This is because it is considered that the rotational speed can be controlled when supplying and discharging grease.

  That is, the grease supply mechanism control device 17 described in the present embodiment is configured such that the rotation speed of the rotary machine 5 is in a predetermined rotation speed range with respect to the rotation machine control device 16 that controls the rotation speed of the rotary machine 5. To the temperature control unit 13 and the pressure feeding unit 12 about the temperature of grease supplied to the rotary machine 5 and the supply amount of grease.

  The old grease loses its oil content, or has a reduced fluidity due to a reaction product such as an oxide or abrasion particles, and is hardly discharged from the rotating machine 5.

  According to the present embodiment, the temperature inside the rotary machine 5 is increased by using grease heated by the oil supply mechanism 14 or by utilizing frictional heat generated by the operation of the rotary machine 5. Accordingly, old grease existing inside the rotating machine 5 is warmed, the viscosity is reduced, the fluidity is increased, and the grease is easily discharged.

  In this state, when new grease is supplied, old grease is pushed out and discharged from the rotating machine 5. In addition, new grease easily spreads to the bearing 7.

  Furthermore, according to the present embodiment, even in the existing rotary machine 5, the oil supply unit is connected to the oil supply port 8, and the oil supply unit is connected to the oil temperature detection unit 15 and the rotation speed detection unit 16 a, so that a large amount is provided. The present invention can be applied to the existing rotating machine 5 without performing additional work or remodeling work.

  The grease temperature can be directly detected by providing a small hole in the rotating machine 5 and introducing a temperature sensor into the inside of the rotating machine 5. The temperature can also be detected indirectly by the temperature sensor.

  The rotation speed can be detected from a control signal of the rotary machine control device 16, an acceleration sensor (not shown) installed on the rotary machine 5, a rotation speed sensor (not shown), and the like. It can also be detected indirectly from the rotation speed of another rotating machine connected to the rotating machine 5. In the case of a wind power generation system, for example, the rotation speed of a shaft inside a speed increaser (not shown) or a generator (not shown) may be indirectly detected from the rotation speed of the rotor 2.

  In other words, in the present embodiment, in supplying and discharging grease, from the viewpoint of maintaining the reliability of the rotating machine 5, the number of movable parts to be maintained should be reduced as much as possible. An oil / fat supply device that can be easily installed can be provided. And a fat supply apparatus can be installed in a wind power generation system, without doing large addition work or remodeling work to the rotary machine 5.

  The grease supply device described in the present embodiment includes a grease temperature detection unit 15 that detects grease temperature inside the rotary machine 5, a grease supply unit 12 that adjusts a supply amount of grease supplied to the rotation machine 5, and a rotation machine 5. A grease supply mechanism 14 having a temperature adjustment unit 13 that adjusts the temperature of grease supplied to the grease 5, and a grease temperature detected by the grease temperature detection unit 15. And a grease supply mechanism control device 17 for instructing the grease temperature and grease supply amount to be supplied to the rotary machine 5.

  The wind power generation system described in the present embodiment has such a fat and oil supply device.

  That is, the present embodiment relates to a fat and oil supply device that supplies grease to the rotating machine 5 and a wind power generation system using the same. In particular, the present embodiment discharges old grease inside the rotating machine 5 and To supply new grease to

  According to the present embodiment, it is possible to provide an oil and fat supply device that enhances the discharge property of old grease inside the rotating machine 5 and the supply property of new grease to the inside of the rotating machine 5 and appropriately maintains the state of grease. . Further, damage to the lubricated bearing 7 can be prevented, and a highly reliable wind power generation system can be provided.

  FIG. 3 is an explanatory diagram illustrating the oil and fat supply device according to the second embodiment.

  FIG. 3 shows a modification of the first embodiment. The description of the same configuration and effect as those of the first embodiment will be omitted.

  In this embodiment, an additional oil supply port 8a and an additional oil discharge port 10a are provided in the vicinity of the oil reservoir 9 of the rotating machine 5. This is different from the first embodiment.

  When it is desired to further enhance the effect of discharging old grease inside the rotary machine 5, an additional oil supply port 8a is opened, and the oil supply mechanism 14 or another oil supply mechanism is connected thereto to supply heated grease. I do. Further, the additional discharge port 10a is opened.

  According to the present embodiment, the heated grease can be directly supplied to the vicinity of the oil reservoir 9 where the grease is likely to stay, so that the effect of increasing the temperature of the old grease, decreasing the viscosity, and improving the fluidity of the surrounding grease is obtained. And the old grease is easily discharged from the rotating machine 5.

  In addition, by opening the additional discharge port 10a in the vicinity of the oil reservoir 9 where grease easily stays, the number of discharge paths is increased, and old grease is easily discharged from the rotary machine 5.

  That is, the wind power generation system described in the present embodiment communicates with the fat and oil supply mechanism, has an additional fat and oil supply port 8a different from the normal fat and oil supply port 8, and further has a normal fat and oil discharge port 10. It has another additional fat and oil outlet 10a.

  FIG. 4 is an explanatory diagram illustrating the oil and fat supply device according to the third embodiment.

  FIG. 4 shows a modification of the first embodiment. The description of the same configuration and effect as those of the first embodiment will be omitted.

  In the present embodiment, a heating device 18 is installed near the oil reservoir 9 of the rotating machine 5 (outer wall of the rotating machine 5). This is different from the first embodiment.

  The heating device 18 includes, for example, a heater, a heat storage device, a heat transfer pipe, and the like, and raises the temperature of grease inside the rotating machine 5. When the heating device 18 is a heater, it is heated and heated by external power. When the heating device 18 is a heat storage device, heat generated by the operation of the rotating machine 5 is stored, and is heated by the heat. When the heating device 18 is a heat transfer pipe, a pipe is installed between the rotary machines so as to transfer heat generated by the operation of another rotary machine, for example, a generator or a speed increaser, to the rotary machine 5. The grease inside the rotating machine 5 is warmed using the movement of the medium flowing through the rotating machine 5.

  That is, the wind power generation system described in the present embodiment includes the heating device 18 that increases the temperature of the outer wall of the rotating machine 5.

  According to the present embodiment, even when the temperature of the grease inside the rotary machine 5 is low in winter or the like and the supply of the heated grease by the oil supply mechanism 14 is not always sufficient, the temperature of the grease inside the rotary machine 5 is reduced. It can be raised to a predetermined range. Furthermore, even if the heat generated by the operation of the rotary machine 5 (increase the rotation speed of the rotary shaft 6) is not always sufficient, the temperature of the grease inside the rotary machine 5 is raised to a predetermined range. be able to.

  Therefore, the fluidity of the grease inside the rotating machine 5 can be more stably increased, and the grease is easily discharged. In particular, when it is desired to discharge old grease, the grease supplied to the rotating machine 5 is, for example, grease or the equivalent of the specification of the rotating machine 5, grease or the equivalent of the use history of the rotating machine 5, or these. Grease base oil or equivalent is preferred.

  When a base oil having a viscosity lower than that of grease is used, it is effective to enhance the discharge property of old grease. However, after confirming the completion of the discharging operation, it is necessary to supply the grease used for the operation again and manage the grease state inside the rotating machine 5 to a state suitable for lubrication.

  The oil supply device described in these embodiments is not necessarily required to be installed in all rotating machines of the wind power generation system.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and includes various modifications. The first, second, and third embodiments need not be used individually, and may be used in combination. Further, in these embodiments, the oil / fat supply device of the present invention has been described for use in a wind power generation system, but may be used for a rotating machine of a hydroelectric power generation system, for example.

DESCRIPTION OF SYMBOLS 1 Blade 2 Rotor 3 Nacelle 4 Tower 5 Rotating machine 6 Rotating shaft 7 Bearing 8 Oil supply port 8a Additional oil supply port 9 Oil pool 10 Oil discharge port 10a Additional oil discharge port 11 Tank 12 Pressure feed unit 13 Temperature control unit 14 Oil supply mechanism 15 Oil temperature detection unit 16 Rotary machine control device 17 Oil supply mechanism control device 18 Heating device

Claims (9)

A fat temperature detecting unit that detects the temperature of fat inside the rotating machine,
A fat-feeding unit having a pressure feeding unit that adjusts a supply amount of fats and oils supplied to the rotary machine, and a temperature control unit that adjusts the temperature of fats and oils supplied to the rotary machine,
An oil supply that instructs the temperature adjustment unit and the pressure feeding unit based on the temperature of the oil detected by the oil temperature detection unit and the temperature of the oil and the supply amount of the oil to be supplied to the rotating machine. A mechanism control device;
A fat and oil supply device characterized by having: Having a rotating machine control device to control the rotating speed of the rotating machine,
The rotation speed of the rotation machine is instructed to the rotation machine control device, and the temperature of the oil and the supply amount of the oil and fat to be supplied to the rotation machine are instructed to the temperature adjustment unit and the pressure feeding unit. The fat and oil supply device according to claim 1, further comprising a fat and oil supply mechanism control device. A rotation speed detection unit that detects a rotation speed of the rotating machine,
Based on the rotation speed of the rotary machine detected by the rotation speed detection unit, the temperature control unit and the pumping unit are instructed on the temperature of the fat and oil supplied to the rotary machine and the supply amount of the fat and oil. A grease supply mechanism control device,
The fat and oil supply device according to claim 1, comprising: A rotating machine having a rotating shaft supported by a bearing, a fat supply port for supplying fat to the bearing, and a fat discharge port for discharging the fat to the outside;
A fat temperature detecting unit that detects the temperature of fat inside the rotary machine, a pressure feeding unit that adjusts a supply amount of fat that is supplied to the fat supply port, and a temperature that adjusts the temperature of the fat that is supplied to the fat supply port An oil supply mechanism having an adjusting unit, and a temperature of the oil supplied to the rotary machine with respect to the temperature adjusting unit and the pumping unit based on the oil temperature detected by the oil temperature detecting unit. A fat and oil supply device comprising: a fat and oil supply mechanism control device for instructing a supply amount of the fat and oil. Having a rotating machine control device to control the rotating speed of the rotating machine,
The rotation speed of the rotation machine is instructed to the rotation machine control device, and the temperature of the oil and the supply amount of the oil and fat to be supplied to the rotation machine are instructed to the temperature adjustment unit and the pressure feeding unit. The wind power generation system according to claim 4, further comprising an oil / fat supply mechanism control device. A rotation speed detection unit that detects a rotation speed of the rotating machine,
Based on the rotation speed of the rotary machine detected by the rotation speed detection unit, the temperature control unit and the pumping unit are instructed on the temperature of the fat and oil supplied to the rotary machine and the supply amount of the fat and oil. A grease supply mechanism control device,
The wind power generation system according to claim 4, comprising: Communicating with the oil supply mechanism,
7. The wind power generation system according to claim 4, further comprising an additional oil / fat supply port different from the oil / fat supply port.   The wind power generation system according to claim 4, further comprising an additional oil / fat outlet other than the oil / fat outlet.   The wind power generation system according to claim 4, further comprising a heating device configured to increase a temperature of an outer wall of the rotating machine.

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