EP3092405A1

EP3092405A1 - Cooling and lubricating device and method for cooling and/or lubricating a transmission for a wind turbine

Info

Publication number: EP3092405A1
Application number: EP14762019.9A
Authority: EP
Inventors: Ibrahim Doertoluk; Udo Froehlich; Bernd Schnurr; Detlef Boehm
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2013-10-25
Filing date: 2014-09-12
Publication date: 2016-11-16
Also published as: WO2015058899A1; CN105874200A; US10145463B2; DE102013224339A1; US20160305538A1

Abstract

A cooling and lubricating device for a transmission (29) for a wind turbine has the following features: a transmission oil tank (31) for storing transmission oil for the transmission (29); a transmission oil line system for conducting the transmission oil between the transmission oil tank (31) and the transmission (29); a hydraulic oil tank (1) for storing hydraulic oil; a hydraulic oil line system for conducting the hydraulic oil; a hydraulic oil pumping device (2) for pumping the hydraulic oil through the hydraulic oil line system; an energy store (16) for at least temporarily maintaining a pressure within the hydraulic oil line system, said energy store (16) being chargeable using the hydraulic oil pumped by the hydraulic oil pumping device (2); and a transmission oil pumping device (17, 20, 18, 21) which is coupled to the hydraulic oil line system and to the transmission oil line system and which is designed to be driven by the hydraulic oil in order to pump the transmission oil to the transmission (29).

Description

Cooling lubricating device and method for cooling and / or lubricating

a gearbox for a wind turbine

The present invention relates to a cooling lubricating device and to a

Method for cooling and / or lubricating a gearbox for a wind turbine.

To be able to supply a transmission, for example a wind turbine with lubricating oil, a direct pump drive can be used by purely electric or electric / mechanical drive. An emergency function (= wet sump position) can be realized by geodetic pressure of a gravity tank.

Gravitational tank expensive, big and heavy, large amount of oil, expensive oil. Direct pump drive with electric motor is only suitable for battery-buffered emergency drive.

It is the object of the present invention to provide an improved cooling lubricating apparatus and method for cooling and / or lubricating a transmission for a wind turbine. This object is achieved by a cooling lubricating device and a method for cooling and / or lubricating a transmission for a wind turbine according to the main claims.

The approach described enables a 2-circuit hydraulic system for cooling lubrication systems, for example of wind turbines. In this case, a purely electric drive and an emergency system for Nasssumpfferstellung be realized in the transmission, for example, wind turbines. The approach described can be used in particular for cooling systems of wind turbines. Advantageously, is a use of

Standard hydraulic components possible. Furthermore, there is a suitability for a

Notantriebskonzept. Advantageously, an implementation of an emergency drive concept with standard hydraulic components for an electric pump drive is possible.

A cooling lubricating device for a transmission for a wind turbine has the following features: a transmission oil tank for storing transmission oil for the transmission; a transmission oil passage system for guiding the transmission oil between the transmission oil tank and the transmission; a hydraulic oil tank for storing hydraulic oil; a hydraulic oil pipe system for guiding the hydraulic oil; a Hydraulikölfördereinrichtung for conveying the hydraulic oil through the

Hydraulic oil line system; an energy storage for at least temporarily maintaining a pressure within the hydraulic oil conduit system, wherein the energy storage by the

Hydraulikölördereinrichtung funded hydraulic oil can be loaded; and a gear oil conveying device connected to the hydraulic oil line system and the

Transmission oil line system is coupled and adapted to be driven via the hydraulic oil to promote the transmission oil to the transmission. The transmission oil tank, the transmission and the transmission oil line system may be part of a transmission oil circuit. The transmission oil pipe system may include a plurality of

Have fluid lines. The hydraulic oil tank, the hydraulic oil pipe system, the

Hydraulikölfördereinrichtung and the energy storage can be part of a Hydraulikolkreislaufs. The hydraulic oil conduit system may include a plurality of fluid conduits. Hydraulikölanschlüsse the Getriebeölfördereinrichtung can with the

Hydraulic oil line system be connected so that, for example, a hydraulic motor of the gear oil delivery device can be arranged in the Hydraulikolkreislauf.

Transmission oil connections of the gear oil delivery device can with the

Be connected transmission oil line system, so that for example a transmission oil pump of the gear oil delivery device may be part of the transmission oil circuit. The Hydraulikolkreislauf and the transmission oil circuit can be designed as separate, fluidly isolated from each other circuits. At least one disposed within the transmission oil circuit

Switching element, such as a valve, can be controlled via the Hydraulikolkreislauf.

The energy storage device can be designed, for example, as a hydraulic accumulator or pressure accumulator. Such a dual-circuit hydraulic system can be an indirect drive for the

Have gear oil pumps. For example, a hydropneumatic energy storage can be used as energy storage and drive an emergency system.

According to embodiments, a mechanical pump may be provided inside or outside a transmission housing of the transmission. The mechanical pump may be coupled to the transmission and the lubrication oil supply to the bearings located in the

Wet sump operation can not be sufficiently lubricated, ensure.

The approach described can be realized inexpensively by eliminating gravity tank and large amount of oil and using standard components. There are no heating elements required, as the drive itself can act as a very powerful heater, thereby shortening the start-up phase. Low technical risk.

The described approach enables a lubricant supply for dry sump and wet sump in wind energy gearboxes. A two-circuit system comprising a hydraulic drive part on the one hand and a lubricating oil circuit on the other hand is proposed. Of the

Lubricating oil circuit has as a hydraulic active components according to an embodiment only filters, lubricating oil pumps, a thermal valve and a changeover valve. These

There are already components for a well-known lubricating oil hydraulics. All drive functions for the lubricating oil pumps, switching between different operating modes, emergency operation memory, etc., however, can be realized by means of the hydraulic drive part. This has the advantage that it can be used for standard hydraulic components and not components for the lubricating oil operation must be modified or newly developed. In addition, as an emergency energy source one compared to

Transmission oil volume compact high pressure hydraulic accumulator are used.

The hydraulic oil conduit system may be configured to move the transmission oil delivery device through the hydraulic oil delivery device and in a normal operating mode

Emergency mode by the energy storage to drive. Through the energy storage can be ensured that the transmission even in case of failure

Hydraulic oil conveyor is sufficiently supplied with gear oil.

The transmission oil delivery device can be driven via the hydraulic oil

Hydraulic motor and a drivable by the hydraulic motor transmission oil pump for conveying the transmission oil include. The motor and the pump can be connected to each other via a shaft. In this way, the hydraulic oil circuit and the transmission oil circuit can be coupled together. The gear oil delivery device may comprise a further hydraulic motor drivable via the hydraulic oil and a further drivable by the further hydraulic motor

Gear oil pump for conveying the transmission oil include. The can

Transmission oil pump and the other transmission oil pump parallel to each other in the

Be arranged transmission oil line system. In the hydraulic oil pipe system may be arranged an adjusting device, which is designed to allow either a drive of the hydraulic motor, the further hydraulic motor or both hydraulic motors via the hydraulic oil. In this way can be different

Gear oil flow rates can be realized. The cooling lubricating device may have a locking device, which in the

Transmission oil line system is arranged to enable or block a backflow of the transmission oil from the transmission to the transmission oil tank. In this case, a control input of the blocking device can be coupled to the hydraulic oil line system. Will the reflux locked, the transmission can be operated in wet sump mode. If the return flow is released, the transmission can be operated in dry sump mode.

The cooling lubricating device may include an overflow device configured to bypass the transmission oil at the locking means to limit an amount of transmission oil located within the transmission. In this way, an amount of transmission oil that is in wet sump mode in the transmission can be limited.

The hydraulic oil tank and the transmission oil tank can share a common partition

exhibit. The common partition can have a high thermal conductivity. In this way, on the one hand, the transmission oil can be warmed by the hydraulic oil and, on the other hand, the hydraulic oil can be cooled by the transmission oil.

The hydraulic oil tank may be disposed inside the transmission oil tank. In this way, a heat transfer between the hydraulic oil and the transmission oil can be optimized.

Alternatively, the hydraulic oil tank and the transmission oil tank may be arranged separately from each other. For example, the hydraulic oil tank and the transmission oil tank may be spaced apart from each other. Regardless of the arrangement of the tanks, that is, whether the tanks are designed separately or together, at least one line of the hydraulic oil line system can be guided through the transmission oil tank. For example, the oil flowing back in the hydraulic circuit can be passed through the transmission oil tank through a coiled tubing. This can be located in the transmission oil tank oil through the

Hydraulic oil to be heated.

The cooling lubricating device may include a pressure limiting valve, which is designed to heat the hydraulic oil, the hydraulic oil to the energy storage

pass by when the energy storage is filled. In this way, the hydraulic oil can be heated by waste heat generated by the Hydraulikölfördereinrichtung. An additional heater is not required.

A method of cooling and / or lubricating a transmission for a wind turbine includes the following steps: Storing gear oil for the transmission in a transmission oil tank;

Storing hydraulic oil in a hydraulic oil tank; and delivering the transmission oil to the transmission using a transmission oil delivery device driven via the hydraulic oil.

In this way, a secure lubrication and temperature control of the transmission can be achieved.

The invention will now be described by way of example with reference to the accompanying drawings. Show it:

Fig. 1 is a schematic representation of a cooling lubricating device;

Fig. 2 to 10 representations of a cooling lubricating device; and

1 1 is a flowchart of a method for cooling and / or lubricating a

Transmission.

Fig. 1 shows a schematic representation of a cooling lubricating device according to an embodiment of the present invention. The cooling lubricating device has a hydraulic oil pipe system and a transmission oil pipe system. Through lines of the hydraulic oil piping system, a hydraulic oil tank 1 for reserving hydraulic oil, a hydraulic oil conveying device 2 for conveying the hydraulic oil, and a pressure accumulator 16 are connected to each other. Through the transmission oil line system, a transmission oil tank 31 for storing transmission oil and a transmission 29 are connected to each other. A

Transmission oil delivery device has interfaces to both the hydraulic oil line system and to the transmission oil line system. The transmission oil conveying device is designed to convey the transmission oil to the transmission 29. This can be the

Transmission oil are driven via the hydraulic oil. For example, the gear oil delivery device may have at least one hydraulic motor driven by the hydraulic oil and at least one hydraulic pump driven by the hydraulic motor for conveying the transmission oil. Depending on the operating mode of the cooling lubricator may be provided for conveying the transmission oil by the Getriebeölfördereinrichtung either from the pressure accumulator 16 or from the Hydraulikölfördereinrichtung 2.

A cooling lubricating device according to embodiments of the present invention will be described below with reference to FIGS. 2 to 10 with reference to an exemplary 2-circuit hydraulic system for cooling lubricating systems of wind power plants.

Fig. 2 shows the basic structure of the system. The system has one

Hydraulic oil tank 1, a hydraulic pump 2, an electric motor 3, a 2/2 way valve 4, a 3/2 way valve 5, a 2/2 way valve 6, a 2/2 way valve 7, a 2/2 way valve 8, a

Flow control valve 9, a check valve 10, a check valve 1 1, a check valve 12, a check valve 13, a check valve 14, a pressure relief valve 15, a pressure accumulator 16, a hydraulic motor 17, a hydraulic motor 18, a transmission oil pump 20, a transmission oil pump 21, a check valve 22, a check valve 23, a fine filter 24, a coarse filter 25, a radiator 26, a thermo valve 27, a closing valve 28, a gear 29, a riser with overflow 30 and a gear oil tank 31.

According to one embodiment, both tanks 1, 31 are arranged in a housing. For example, the tank 1 may be integrated in the transmission oil tank 31, so that the

Outer surfaces of the tank 1 are wetted by as much gear oil. This ensures that the heat transfer between the hydraulic oil and the transmission oil is good.

The hydraulic oil tank 1 is connected to the hydraulic pump 2 via a pipe. Of the

Electric motor 3 is designed to drive the hydraulic pump 2. An output of the hydraulic pump 2 is via lines with an input of a 2/2 way valve 4, via the check valves 10, 1 1 with a first input of the 3/2 way valve 5, via the check valve 10 with an input of a 2/2 way valve 6, a 2/2-way valve 7, a 2/2-way valve 8, a shut-off valve connected to a port of the pressure accumulator 16 and the shut-off valve to an input of the pressure relief valve 15. An output of the pressure limiting valve 15 is connected to a return line for returning the hydraulic oil into the hydraulic oil tank 1.

An output of the 2/2 way valve 4 is connected to an input of the hydraulic motor 17, via the check valve 12 to the return line for returning the hydraulic oil in the Hydraulic oil tank 1 and connected to an input of a 2/2 way valve 8. An output of the 2/2 way valve 6 is connected via the flow control valve 9 to the input of the hydraulic motor 17. An output of the 2/2 way valve 8 is connected to an input of the 2/2 way valve 7. An output of the 2/2 way valve is connected to the return line.

An output of the hydraulic motor 17 is connected via the check valve 13 to an input of the hydraulic motor 18, the input of the 2/2 way valve 7 and a check valve to the return line. An output of the hydraulic motor 18 is connected via the check valve 14 to the return line.

The hydraulic motor 17 is configured to drive the transmission oil pump 20. Of the

Hydraulic motor 18 is configured to drive the transmission oil pump 21. An input of the transmission oil pump 20 is for conveying the transmission oil via a line with the

Transmission oil tank 31 connected. Accordingly, an input of the transmission oil pump 21 for conveying the transmission oil is connected to the transmission oil tank 31 via a pipe.

An output of the transmission oil pump 20 is connected via a series circuit of a first parallel circuit of the check valve 22 and the coarse filter 25 and a second parallel circuit of the check valve 23 and the fine filter 24 and the radiator 26 with a transmission oil input of the transmission 29. Parallel to the radiator 26, a thermo valve 27 is connected. A transmission oil output of the transmission 29 is connected to an input of the closing valve 28. An output of the closing valve 28 is connected to the transmission oil tank 31 so that the transmission oil from the transmission 29 can flow back into the transmission oil tank 31 via the closing valve 28. A control input of the closing valve 28 is connected to an output of the 3/2 way valve 5. A second input of the 3/2 way valve 5 is connected to the

Return line connected. The transmission oil output of the transmission 29 is also connected via the riser to the overflow 30 with the transmission oil tank 31. A height of the overflow 30 defines a maximum level of the transmission oil in the transmission 29. Instead of the riser, other suitable means for limiting the level of the transmission oil in the transmission 29 may be used. In Fig. 2, the transmission 29 is shown with wet sump. The electric motor 3 is in operation.

According to one embodiment, about 50dm ³ Hydraulikol and about 550dm ³ gear oil is used.

In the following FIGS. 3 to 10, the volume flows in the cooling lubricating device are shown by arrows. For hydraulic oil, a low-pressure volume flow at 1 bar and a high-pressure flow at 160 to 250 bar may be present. For transmission oil, low pressure volume flow can be 1 bar and high pressure flow rate up to 20 bar.

3 shows a filling of the pressure accumulator 16 of the already with reference to FIG. 2

described cooling lubricating device according to an embodiment of the present invention. For this purpose, the 2/2 way valve 5 is switched to the position shown. The electric motor 3 drives the hydraulic pump 2. The hydraulic pump delivers hydraulic oil into the accumulator 16 and fills it up. The oil level in the hydraulic oil tank 1 drops.

Arrows indicate a volumetric flow of hydraulic oil driven by the hydraulic pump 2 out of the hydraulic tank 1 into the pressure accumulator 16.

The transmission 29 is located in the dry sump.

4 shows a heating of the oil according to an embodiment of the present invention. If it is necessary to warm up the transmission oil, for example at temperatures below -20 ° C, the arrangement shown can be selected. The drive is the same as shown in Fig. 3. The accumulator 16 is filled, the pump 2 further promotes hydraulic oil, so that the pressure relief valve 15 opens. The hydraulic oil is over the

Pressure relief valve 15 is pressed and heats up. The heated hydraulic oil runs back into the hydraulic tank 1 and heats it. Since the hydraulic tank 1 is disposed in the transmission oil tank 31, the transmission oil also heats up. The heating effect is strong, it corresponds to the rated power of the electric motor 3. Heating elements in the transmission oil tank 31 or

Hydraulic oil tank 1 are not necessary. The drive benefits from the fact that a low-viscosity hydraulic oil can be used. This exhibits acceptable viscosity values even at low temperatures. The heat of the hydraulic oil is used to heat the transmission oil via a partition between the tanks 1, 31. The transmission 29 is located in the dry sump.

In FIGS. 5, 6 and 7 described below, it is shown how different volume flows can be generated in order to produce the wet sump in the transmission 29. It is true that with highly viscous, tough gear oil and large required

Torque for the transmission oil pumps 20 or / and 21, a small volume flow of the transmission oil is selected. It may be necessary for very cold gear oil and correspondingly high torque requirement only the drive with the smallest

To drive delivery volume and wegzuschalten this in warmer gear oil and drive the next larger to drive when reaching the desired temperature, both drives 17, 18 at the same time.

Fig. 5 relates to a first wet sump generation according to an embodiment of the present invention. It shows how the wet sump is generated in the transmission 29. First, the valve 28 is closed. For this purpose, the 3/2 way valve 5 is switched to the position shown. As a result, hydraulic oil flows from the accumulator 16 via a node 40, the check valve 1 1, the 3/2 way valve 5 and a control line 50 to the closing valve 28 and closes this. The oil drain from the transmission 29 to the transmission oil tank 31 is interrupted. From the accumulator 16 while running only a small amount

Hydraulic oil which corresponds to the switching volume of the closing valve 28. Since the pressure accumulator 16 is large-volume according to its task energy storage for emergency, its pressure level, for example, of 250 bar, barely drops.

Then, the pump 2 is brought by the electric motor 3 in motion and simultaneously switched the 2/2 way valves 4.7 in the position shown. As a result, the hydraulic oil delivered by the pump 2 from the hydraulic oil tank 1 passes through a node 41 to the 3/2 way valve 4. It does not run via the check valve 10 to the node 40, since the local pressure level is higher. From the 2/2 way valve 4, the hydraulic oil passes through a line 51 to the hydraulic motor 17 and drives it. The effluent from the hydraulic motor 17 Hydraulikol flows via check valve 13 and 2/2 way valve 7 to the hydraulic oil tank. 1 The hydraulic motor 17 driven as described drives the transmission oil pump 20 via a shaft. This promotes transmission oil, as indicated by arrows, on the coarse filter 25, fine filter 24 - and in cold gear oil bypassing the radiator 26 - to the thermal valve 27 and this to the transmission 29. The sequence of the transmission 29 is through the

Closing valve 28 is blocked, so that the transmission oil level in both the transmission 29 and in the riser with overflow 30 equally increases until the transmission fluid in the riser 30 reaches the overflow level and runs back into the transmission oil tank 31. The transmission 29 remains with the necessary, constant even with continuing running transmission oil pump

Gear oil quantity filled. Thus, the wet sump is made in the transmission 29.

According to one embodiment, the transmission oil may be in the one shown in FIG

Operating state are also heated by the heat introduced into the hydraulic oil, as described with reference to FIG. 4. For this purpose, the two tanks 1, 31 with a common wall adjacent or arranged inside each other. Alternatively, the leading back into the tank 1 return via a coiled tubing, which is immersed in tank 31, are performed.

Fig. 6 shows a second wet sump generation according to an embodiment of the present invention. The switching position of the valves is as with reference to FIG. 5

described, with the difference that the 2/2 way valve 7 is closed and the 2/2 way valve 8 is open. As a result, the hydraulic motor 18 and the transmission oil pump 21 are driven, and the hydraulic motor 17 and the transmission oil pump 21 are not driven. Fig. 7 shows a third wet sump generation according to an embodiment of the present invention. The switching position of the valves is as described with reference to Figures 5 and 6, with the difference that directional control valve 7 and 8 are closed. As a result, the hydraulic motors 17, 18 and the gear oil pumps 20, 21 are driven. As can be seen with reference to FIGS. 6, 7 and 8, when the hydraulic motors 17, 18 are the same and the transmission oil pumps 20, 21 have different displacement volumes, three different delivery rates of the transmission fluid can be set. The same applies vice versa. The greatest possible spreading of the three possible delivery flows can be achieved

different absorption volumes of the hydraulic motors 17, 18 and the transmission oil pumps 20, 21 achieve. Two times three, so six different volume flows of the gear oil can be generated when the electric motor 3 is operable at two different speeds.

Fig. 8 shows a wet sump generation and heating according to an embodiment of the present invention. Referring to Fig. 8, it will be described how to prepare the wet sump while heating the hydraulic oil and the transmission oil. The heating of the oil can be applied not only in generating the wet sump in the transmission 29 but also in the normal condition shown in FIG. It is always accompanied by a reduction of the transmission oil volume flow.

The 3/2 way valve 5 is switched to the position shown. As a result, the closing valve 28 closes as described in FIG. 5. The volume flow leading thereto is not shown for the sake of clarity, but can be seen in FIG. As soon as the closing valve 28 is closed, no further volume flow is required for this purpose. Then he drives

Electric motor 3, the hydraulic pump 2 on.

The volumetric flow generated by the hydraulic pump 2 flows to the node 43. There it branches off. The partial volume flow, which drives the hydraulic motor 17 and the transmission oil pump 20, flows via the 2/2 directional control valve 6 to the flow control valve 9. The flow control valve 9 regulates the volume flow to a fixed value which is smaller than that of the hydraulic pump 2 and reaches the hydraulic motor 17 and drives this. The difference of

Pump volume flow and the hydraulic motor 17 driving volume flow flows at node 43 to the pressure relief valve 15 and opens this. The opening pressure corresponding to the set pressure of the pressure relief valve 15 is the pressure in all

Lines between the output of the hydraulic pump 2 and the pressure relief valve 15 and the input of the hydraulic motor 17 is present and, for example, is 250 bar. The flowing to the pressure relief valve 15 volume flow causes the

Oil heating. According to an alternative embodiment, the flow control valve 9 is a controllable

Valve, ie the flow rate through this valve 9 is infinitely adjustable. Thereby, the heating power at the pressure relief valve 15 and the speed, and thus the flow rate of the hydraulic motor 17 are continuously adjusted. The higher the heating capacity the better smaller the speed and vice versa. At most, the power of the electric motor 3 is available.

Fig. 9 illustrates the plant in normal operation according to an embodiment of the present invention. The valves are in the drawn position. The transmission oil flows unimpeded from the transmission 29 via the closing valve 28 into the transmission oil tank 31. The thermo valve 27 is closed, i. the transmission oil flows with maximum volume flow through the radiator 26 to the transmission 29. According to one embodiment, a typical function of a thermovalve is open up to 40 ° C, closing from 40 ° C to 55 ° C and closing at 55 ° C. An actuation can be done by bimetal. If this operating state is reached, the cooler 26 is thus activated, not only the transmission oil, but also the hydraulic oil is cooled by the radiator 26. In Fig. 10, the emergency according to an embodiment of the present invention is shown as it arises, for example, by a power failure. The valves switch to the drawn position. A small amount of the accumulator volume 16 flows through the check valve 1 1 and the 3/2 way valve 5 to the closing valve 28 and causes its closing. The check valve 1 1 prevents the backflow of hydraulic oil from the closing valve 28, so that the closing valve 28 remains closed as long as the 3/2 way valve 5 remains in the position shown.

The remaining amount of pressure accumulator volume 16 flows through 2/2 way valve 6 and the flow control valve 9 to the hydraulic motors 17, 18 and drives them. That of the

Hydromotors 17, 18 flowing hydraulic oil flows to the hydraulic oil tank 1 to. The speed of the hydraulic motors 17, 18 is limited by the flow control valve 9 and kept constant.

By the rotation of the hydraulic motors 17, 18, the transmission oil pumps 20, 21 are driven. The displacement, which corresponds to the size of the transmission oil pumps 20, 21, is by a factor of 10 to 15 times greater than that of the hydraulic motors 17, 18, so that the movement of the

Hydraulic motors 17, 18 takes place at high pressure, while the movement of the gear pumps 20, 21 takes place with reduced by the same factor low pressure. The transmission oil pumps 20, 21 promote transmission oil from the transmission oil tank 31 via the filters 25, 24 to the transmission 29th The oil level in the transmission 29 increases until the level reaches the overflow 30 in the riser 30. Then inflowing transmission oil flows to the transmission oil tank 31, the oil level in the transmission 29 remains constant. The process continues until the accumulator 16 is empty.

According to one embodiment, the described approach is characterized by separate oil circuits for hydraulic and transmission oil, a common tank 1, 31, heating, cooling and an emergency drive. In the emergency drive, the pressure accumulator 16 drives the elements 17, 20 and 18, 21. The indirect drive 2,3 drives the elements 17, 20 and 18, 21. There is an overflow on the gearbox 29.

Fig. 1 1 shows a flow diagram of a method for cooling and / or lubricating a transmission. The method can be implemented using means of a previously described cooling lubricating device.

The method includes a step of storing transmission oil for the transmission in a transmission oil tank 101, a step of storing hydraulic oil in one

Hydraulic oil tank and a step of conveying 103 of the transmission oil to the transmission 29 using a hydraulic oil driven Getriebeölfördereinrichtung.

The same or similar elements may be provided in the following figures by the same or similar reference numerals. Furthermore, the figures of the drawings, the description and the claims contain numerous features in combination. It is clear to a person skilled in the art that these features are also considered individually or that they can be combined to form further combinations not explicitly described here.

Bezuaszeichenliste

1 hydraulic oil tank

2 hydraulic pump

3 electric motor

4 2/2 way valve

5 3/2 way valve

6 2/2 way valve

7 2/2 way valve

8 2/2 way valve

9 flow control valve

10 check valve

1 1 check valve

12 check valve

13 check valve

14 check valve

15 pressure relief valve

16 accumulator

17 hydraulic engine

18 hydraulic engine

20 transmission oil pump

21 Transmission oil pump

22 check valve

23 check valve

24 fine filters

25 coarse filters

26 coolers

27 thermo valve

28 closing valve

29 gears Riser with overflow Transmission oil tank

Storage of gear oil Storage of hydraulic oil Transfer of gear oil

Claims

claims

A cooling lubricating apparatus for a transmission (29) for a wind turbine, comprising: a transmission oil tank (31) for storing transmission oil for the transmission (29); a transmission oil line system for guiding the transmission oil between the

Transmission oil tank (31) and the transmission (29); a hydraulic oil tank (1) for storing hydraulic oil; a hydraulic oil pipe system for guiding the hydraulic oil; a hydraulic oil conveying device (2) for conveying the hydraulic oil through the hydraulic oil piping system; an energy store (16) for at least temporarily maintaining a pressure within the hydraulic oil line system, wherein the energy store (16) can be loaded by hydraulic oil conveyed by the hydraulic oil feed device (2); and a Getriebeölfördereinrichtung (17, 20, 18, 21), with the

Hydraulic oil line system and the transmission oil line system is coupled and adapted to be driven via the Hydraulikol to promote the transmission oil to the transmission (29).

2. The cooling lubricating device according to claim 1, wherein the hydraulic oil pipe system is formed to the Getriebeölfördereinrichtung (17, 20, 18, 21) in one

Normal operating mode by the Hydraulikölfördereinrichtung (2) and in an emergency operating mode by the energy storage (16) to drive. Cooling lubrication device according to one of the preceding claims, in which the gear oil delivery device (17, 20, 18, 21) has a hydraulic motor (17) which can be driven by the hydraulic oil and a drive trainable by the hydraulic motor (17)

Transmission oil pump (20) for conveying the transmission oil includes.

Cooling lubricating device according to one of the preceding claims, in which the gear oil delivery device (17, 20, 18, 21) comprises a further hydraulic motor (18) drivable via the hydraulic oil and a further transmission oil pump (21) which can be driven by the further hydraulic motor (18) for conveying the transmission oil in which the transmission oil pump (20) and the further transmission oil pump (21) are arranged parallel to one another in the transmission oil line system, and wherein in the hydraulic oil line system an adjusting device (4, 7, 8) is arranged, which is designed to selectively drive the hydraulic motor ( 17), the further hydraulic motor (18) or both hydraulic motors (17, 18) to enable the hydraulic oil.

Cooling lubricating device according to one of the preceding claims, with a locking device (28) which is arranged in the transmission oil line system to release or inhibit a backflow of the transmission oil from the transmission (29) to the transmission oil tank (31), wherein a control input of the locking device (28 ) is coupled to the hydraulic oil line system.

A cooling lubricating apparatus according to claim 5, comprising overflow means (30) adapted to bypass the transmission oil at the lock means (28) to limit an amount of transmission oil within the transmission (29).

Cooling lubricating device according to one of the preceding claims, wherein the hydraulic oil tank (1) and the transmission oil tank (31) have a common partition and the common partition has a high thermal conductivity. Cooling lubricating device according to one of the preceding claims, wherein the hydraulic oil tank (1) and the transmission oil tank (31) are made separately from each other, and at least one line of the hydraulic oil line system is guided by the transmission oil tank (31).

Cooling lubricating device according to one of the preceding claims, wherein the hydraulic oil tank (1) within the transmission oil tank (31) is arranged.

Cooling lubricating device according to one of the preceding claims, comprising a pressure limiting valve (15) which is designed to be used for heating the

Hydraulic oil to pass the hydraulic oil to the energy storage (16) when the energy storage (16) is filled.

Cooling lubricating device according to one of the preceding claims, wherein the transmission oil line system, a first line for guiding the transmission oil from the transmission oil tank (31) to a first transmission oil inlet of

A gear oil conveying means (17, 20, 18, 21), a second pipe for guiding the gear oil from the gear oil tank (31) to a second gear oil inlet of the gear oil conveying means (17, 20, 18, 21), a third pipe for guiding the gear oil from a first one first transmission oil outlet and a second

Transmission oil outlet of the gear oil delivery device (17, 20, 18, 21) to the transmission (29) and a fourth line for guiding the transmission oil from the transmission (29) to the transmission oil tank (31).

Cooling lubricating device according to one of the preceding claims, in which the hydraulic oil line system has a first line for connecting the hydraulic oil tank (1) to the hydraulic oil conveying device (2), a second line for connecting an outlet of the hydraulic oil conveying device (2) to an inlet of a 2/2 directional valve ( 4), the output of the Hydraulikölfördereinrichtung (2) via

Check valves (10, 1 1) having a first input of a 3/2 way valve (5), the output of Hydraulikölördereinrichtung (2) via the check valve (10) having an input of a 2/2 way valve (6), the output of

Hydraulic oil delivery device (2) via a 2/2 way valve (7), a 2/2 way valve (8) and a shut-off valve with a connection of the energy store (16) and the Output of Hydraulikölfördereinrichtung (2) via the shut-off valve with an input of the pressure relief valve (15), a third line to

Connecting an output of the pressure relief valve (15) with a

Return line for returning the hydraulic oil in the hydraulic oil tank (1), a fourth line for connecting an output of the 2/2 way valve (4) to an input of the Getriebeölfördereinrichtung (17, 20, 18, 21), the output of the 2/2 way valve (4) via a check valve (12) with the return line and the output of the 2/2 way valve (4) with an input of a 2/2 way valve (8), a fifth line for connecting an output of the 2/2 way valve ( 6) via a flow control valve (9) with the input of Getriebeölfördereinrichtung (17, 20, 18, 21), a sixth line for connecting an output of the 2/2 way valve (8) with an input of the 2/2 way valve (7) a seventh conduit for connecting an output of the 2/2 way valve (7) to the

An eighth conduit for connecting an output of the Getriebeölfördereinrichtung (17, 20, 18, 21) via a check valve (13) with a further input of the Getriebeölfördereinrichtung (17, 20, 18, 21), the output of the Getriebeölfördereinrichtung (17 , 20, 18, 21) having the input of the 2/2 way valve (7) and the output of the gear oil delivery means (17, 20, 18, 21) via a check valve with the return line, and a tenth conduit for connecting an output of the gear oil delivery means (17, 20, 18, 21) via a check valve with the return line.

Method for cooling and / or lubricating a transmission (29) for a

Wind turbine, the method comprising the following steps:

Storing (101) transmission oil for the transmission (29) in a transmission oil tank (31);

Storing (102) hydraulic oil in a hydraulic oil tank (1); and

Conveying (103) the transmission oil to the transmission (29) using a transmission oil delivery device (17, 20, 18, 21) driven via the hydraulic oil.