Transmission

• US 20110233003A1
• Filed: 10/30/2009
• Published: 09/29/2011
• Est. Priority Date: 11/03/2008
• Status: Abandoned Application

• Current Assignee: Aerodyn Engineering GmbH
• Original Assignee: Aerodyn Engineering GmbH
• Inventors: Siegfriedsen, Sonke
• Application Number:
  US13/126,316
• Publication Number:
  US 20110233003A1
• Time in Patent Office: Days
• US Class Current: 184/26
• CPC Class Codes: F03D 15/00 Transmission of mechanical power
• CPC Class Codes: F05B 2260/98 Lubrication
• CPC Class Codes: F16H 57/04 Features relating to lubrication or cooling or heatingin hydrokinetic gearing F16H41/30; control of lubrication or cooling in hydrostatic gearing F16H61/4165
• CPC Class Codes: F16H 57/0435 Pressure control for supplying lubricant; Circuits or valves therefor
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

A transmission, having a connection for the supply of transmission oil and a connection for the discharge of transmission oil, characterized by a compressor which generates an overpressure in the transmission interior space, wherein the magnitude of the overpressure is controlled as a function of the air temperature outside the transmission and/or as a function of the temperature in the transmission interior and/or as a function of the temperature difference between the temperature of the lubricating oil supplied to the transmission and the temperature of the lubricating oil discharged from the transmission.

Claims

1. A transmission, having a connection for the supply of transmission oil and a connection for the discharge of transmission oil, comprising:

a compressor which generates an overpressure in an interior space of the transmission, wherein a magnitude of the overpressure is controlled as a function of air temperature outside the transmission or as a function of a temperature in the interior space or as a function of a temperature difference between the a temperature of lubricating oil supplied to the transmission and a temperature of lubricating oil discharged from the transmission.

2. The transmission according to claim 1, further comprising a control system that limits the overpressure created by the compressor to a value that is smaller relative to an injection pressure of the lubricating oil.

3. The transmission according to claim 2, wherein a level of the overpressure is in addition controlled as a function of an oil level in the interior space, a flow velocity in an oil drain, a viscosity or a difference of a volume flow of lubricating oil fed to and discharged from the transmission.

4. The transmission according to claim 1, wherein the compressor has a filter device for separating off aerosols or moisture.

5. A lubricating-oil circuit comprising:

a compressor which generates an overpressure in an interior space of the transmission, wherein a magnitude of the ovwressure is controlled as a function of air temperature outside the transmission or as a function of a temperature in the interior space or as a function of a temperature difference between a temperature of lubricating oil supplied to the transmission and a temperature of lubricating oil discharged from the transmission,

a line feeding lubricating oil to the transmission,

a line discharging lubricating oil from the transmission; and

a pump connected to the line feeding lubricating oil and the line discharging lubricating oil.

6. The lubricating-oil circuit according to claim 5, further comprising a tank arranged in the lubricating-oil circuit for providing or keeping lubricating oil at a specified temperature.

7. The lubricating-oil circuit according to claim 5, wherein the line feeding lubricating oil exhibits heating elements for keeping the lubricating on at a specified temperature.

8. The lubricating-oil circuit, according to claim 5, wherein the transmission is the transmission of a wind turbine.

9. The lubricating-oil circuit according to claim 5, wherein the level of the overpressure is controlled asas a function of the air temperature outside the wind turbine.

10. method for lubricating a transmission using oil, comprising the steps of;

feeding oil to those components of the transmission that are in need of lubrication,

discharging the oil from the transmission, and

creating a controlled pressure in an interior space of the transmission that is higher relative to atmospheric air pressure surrounding the transmission, as a function of the air temperature outside the transmission or a temperature in the interior space or a temperature difference between the lubricating oil supplied to the transmission and lubricating oil discharged from the transmission, to effect a predetermined oil outflow from the transmission.

11. The method according to claim 10, further comprising:

creating an overpressure in the transmission interior space which is smaller than an injection pressure of the transmission oil.

12. The method according to claim 11, wherein a level of the overpressure is additionally controlled as a function of an oil level in the interior space, a flow velocity in an oil drain, a viscosity or a difference of a volume flow of lubricating oil fed to and discharged from the transmission.

13. The method according to claim 10, further comprising:

creating an air pressure in the interior space using air purified from aerosols or dried air.

14. The method according to claim 10, further comprising:

keeping the oil fed to the transmission at a specific temperature.