JPS6241927A - Supercharger bearing lubricating oil pump - Google Patents

Abstract

PURPOSE:To eliminate the necessity of an additional power source, by utilizing compressed air fed from a supercharger as a drive power source for a lubricating oil pump for lubricating bearings in the supercharger. CONSTITUTION:Compressed air which is fed from a supercharger and led by an air pipe 8 through a hole 7 formed in the wall surface of a body 4 positioned in the rear of a diffuser 6, drives a lubricating oil pump (air turbine pump) 9 for feeding lubricating oil which lubricates bearings in the supercharger. An auxiliary air source 10 is adapted to be used when the compress air from the supercharger cannot drive the air turbine pump 9 during starting or stopping of the engine. As the auxiliary air source 10, compressed air for starting the engine, and air from an auxiliary blower in the engine.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power source for driving a bearing lubricating oil pump of a supercharger.

<Conventional Technology> Conventionally, a dedicated independent electric pump, a pump directly connected to the rotor shaft, etc. are used to lubricate the bearing for a supercharger.

According to such conventional methods, for example, in the case of a pump that is directly connected to the rotor shaft of a supercharger, the space at the front and rear ends of the rotor shaft is occupied by the pump and its accessories.
This is disadvantageous in handling the supercharger when removing the rotor shaft of the supercharger.

On the other hand, when an electric pump is used, the power source is required outside the supercharger, and the independence of the supercharger is lost.

(Problems to be Solved by the Invention) The present invention solves problems such as disadvantages in maintaining the turbocharger due to the conventional lubrication device in the bearing for the turbocharger, and problems such as impairing the independence of the turbocharger. The present invention aims to provide a rational lubricating oil pump for supercharger bearings.

(First stage for solving the problem) Therefore, the present invention provides a lubricating oil pump for a supercharger bearing that is driven by a part of the compressed air generated from the supercharger itself, and is driven by a part of the compressed air generated from the supercharger itself, and if necessary The use of an air turbine pump which is adapted to be switched to an air source provides a solution to the above problems.

(Operation) Compressed air that is partially branched from the high pressure side of the blower of the supercharger is discharged after driving the air turbine pump.

In addition, in operating ranges where the pressure/flow rate required to drive the pump is not obtained when the main engine starts and stops, an external air source such as compressed air for starting the main engine or air supplied from the main engine's auxiliary blower can be used as an auxiliary air source. The compressed air is used to drive the air turbine pump.

The operation of this air turbine pump sends lubricating oil to the bearings of the supercharger.

<Embodiment> Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 indicates a rotor shaft of a supercharger, and a blower 2 is attached to the low-cool shaft 1.
, turbine N3 is installed. 4 is the supercharger body, 5 is the whirlpool chamber, and 6 is the diffuser.

A hole 7 is formed in a portion located behind the diffuser 6 in terms of air flow, for example, on the wall surface of the main body 4, and the end of an air pipe 8 connected to the inlet side of the air turbine pump is inserted into this hole 7. Concatenated. Therefore, the compressed air generated in the supercharger and guided by the air pipe 8 through the hole 7 drives the air turbine pump 9.

10 indicates an auxiliary air source used when the engine is stopped. As this auxiliary air source 10, for example, compressed air for starting the main engine, air supplied from an auxiliary blower of the main engine, etc. are used.
The compressed air sent from the supercharger is switched to use when the pressure/flow rate required to drive the air turbine pump 9 cannot be obtained.

The lubricating oil sent by driving the air turbine pump 9 lubricates the bearings of the supercharger.

(Effects of the Invention) As explained above in detail, the present invention uses compressed air generated by the supercharger itself as a power source for driving the lubricating oil pump necessary for lubricating the bearings of the supercharger. This eliminates the need for a single power source, and in terms of space, the pump position can be moved arbitrarily due to the air piping, allowing for rational design.

Furthermore, even when compressed air cannot be obtained from the supercharger, it is possible to switch to an auxiliary air source, which can be easily obtained by requesting an auxiliary blower or the like of the main engine.

[Brief explanation of the drawing]

The figure is a schematic explanatory diagram of the piping state of a supercharger bearing lubricating oil pump showing an embodiment of the present invention. Explanation of the main parts of the diagram 4 - Supercharger body 7 - Hole 9 - Air turbine pump 10 - (auxiliary) air source Patent applicant Mitsubishi Heavy Industries, Ltd.
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Claims (1)

[Claims] A lubricating oil pump for supercharger bearings characterized by the use of an air turbine pump driven by a portion of the compressed air generated by the supercharger itself, which can be switched to another air source if necessary. and supercharger bearing lubricating oil pump.