JPS6311878Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating machine with a lubricated vane pump.

As an example of a rotary machine with a lubricated vane pump,
As shown in No. 53-114509, there is an automotive AC generator (hereinafter referred to as a generator) with a vacuum pump.

FIG. 1 is a structural sectional view of an example in which a vacuum pump is directly connected to a generator. They are connected by volute serrations 10a.

A bearing 7 for receiving the rotor 4 and an oil seal 8 for sealing the generator and vacuum pump 9 are incorporated inside the bracket 6. Furthermore, engine oil is mainly used to lubricate the vacuum pump 9.

In this structure, if the lubricating oil of the vacuum pump 9 deteriorates or foreign matter gets mixed in, affecting the oil seal 8 and causing shaft wear, etc., and the lubricating oil leaks from the oil seal 8, the inside of the generator In order to prevent contamination and poor insulation, remove the bracket 6 from between the bearing 7 and the oil seal 8 as shown in Figures 2 and 3.
An inclined through hole 11 is provided in the oil seal 8.
The lubricating oil of the vacuum pump leaking from the vacuum pump flows through the through hole 11 and flows out from the oil outflow guide 12 to the outside of the generator.

However, with this method, when installing the generator to the engine, the position of the through hole is ±10 ~ due to belt tension, etc.
The angle varies by 20 degrees, so depending on the angle, it may not work as it was intended to drain oil.

The present invention eliminates the problems of the prior art mentioned above,
To provide an oil spill machine which can surely drain vacuum pump lubricating oil leaking from an oil seal to the outside of a generator and can be adapted to the mounting angle of the generator.

The present invention provides a gap between the bearing and the oil seal, a semicircular arc-shaped groove depressed from the outer diameter of the bearing on the inner peripheral surface of the bracket in this gap, and a through hole from this groove to the outside of the rotating machine. This is intended to effectively and reliably cause the lubricating oil leaking from the oil seal portion to flow out of the rotating machine from the through hole.

Examples of the present invention are shown below in Figures 4, 5, and 6.
To explain with the drawing, a gap is provided between the bearing 7 and the oil seal 8, and the inner circumferential surface of the bracket 1 in the gap is
5 is a semicircular arc-shaped groove 14 depressed from the outer diameter part of the bearing 7.
will be established. A through hole 1 is provided from the groove 14 to the outside of the rotating machine.
3 (the through hole 13 may be either the thrust direction through hole 13a or the radial direction through hole 13b), the lubricating oil leaking from the oil seal 8 flows into the generator beyond the bearing 7. It accumulates in the semicircular arc-shaped groove 14 without any
It flows through the through hole 13 and flows out of the generator. Moreover, by forming the semicircular arc-shaped groove 14, even if there are variations in the installation of the generator, leaked oil can be sufficiently collected and drained. Furthermore, if the through hole 13 itself is made elongated and an oil outflow guide to the outside of the generator is provided, the oil outflow can be effectively and reliably smoothed out.

According to the above means, the lubricating oil leaked from the oil seal does not flow into the inside of the generator.
Therefore, adverse effects on the bearing can be prevented. Furthermore, by making the semicircular arc-shaped groove and the through hole elongated, it is possible to greatly improve the range of applications for the generator installation angle.

[Brief explanation of drawings]

Figure 1 is a structural cross-sectional view of an example in which the vacuum pump of the generator is directly connected, Figures 2 and 3 are cross-sectional views of main parts showing a conventional oil spill mechanism, and rear views of the bracket, Figures 4 and 3. 5 and 6 are sectional views of essential parts showing the oil spill mechanism according to the present invention. 13... Through hole, 13a... Slight direction through hole, 13b... Radial direction through hole, 14... Semicircular arc groove, 15... Bracket inner peripheral surface.

Claims (1)

[Scope of utility model registration request] In a mechanism in which one end of the rotor shaft is extended to the non-drive side of a rotating machine and a lubricated vane pump is directly connected, an oil seal is placed with a gap between the rear bracket of the non-drive side bearing and the rotating shaft. A rotating machine with a lubricated vane pump, characterized in that a semicircular groove is provided in the gap, and the groove is communicated with outside air through a through hole provided in the bracket.