Piezoelectric lubricating device for a bearing
AssigneeSiemens Aktiengesellschaft
InventorJohannes Daeges
Life of this patent
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Abstract
A lubricating device for a bearing across which a gas pressure gradient exists includes a piezoelectric tubule operating as a pump receiving a lubricant and introducing the lubricant into a propellant gas stream passing through the bearing due to a pressure gradient across the bearing. At least one sensor determines the operating state of the bearing and an electric current supply is connected between the at least one sensor and the piezoelectric tubule.
Claims41
Lubricating device for a bearing across which a gas pressure gradient exists, comprising a piezoelectric tubule operating as a pump receiving a lubricant and introducing the lubricant into a propellant gas stream flowing past said piezoelectric tubule in a given direction and passing through the bearing due to a pressure gradient across the bearing, said piezoelectric tubule ejecting lubricant droplets into the propellant gas stream in said given direction, at least one sensor determining the operating state of the bearing, and an electric current supply connected between said at least one sensor and said piezoelectric tubule.
Combination, comprising a bearing across which a gas pressure gradient exists, and a lubricating device for said bearing including a piezoelectric tubule operating as a pump receiving a lubricant and introducing the lubricant into a propellant gas stream flowing past said piezoelectric tubule in a given direction and passing through said bearing due to a pressure gradient across said bearing, said piezoelectric tubule ejecting lubricant droplets into the propellant gas stream in said given direction, at least one sensor determining the operating state of said bearing, and an electric current supply connected between said at least one sensor and said piezoelectric tubule.
Lubricating device for a bearing comprising:
- (a) a piezoelectric tubule operating as a pump receiving a lubricant and introducing the lubricant into the bearing, said tubule having a lubricant inlet end;
- (b) an embedding compound in which said tubule is retained;
- (c) a tapering outlet opening associated with said embedding compound;
- (d) a lubricant delivery tube disposed at said inlet end of said tubule;
- (e) a temperature sensor monitoring the bearing to be lubricated and measuring the temperature thereof;
- and
- (f) electric control means operatively connected to said piezoelectric tubule for supplying an electric voltage and a frequency thereto, said electric control means having an input side connected to said temperature sensor for controlling at least one of said frequency and said voltage in dependence on the temperature measured by said temperature sensor.
Dependencies are inferred from the claim text.