JPH0276926A - Lubricating device for rotary electric appliance bearing - Google Patents

Abstract

PURPOSE:To eliminate oil property change, etc., due to wear or damage of component parts or agitation of lubricating oil to provide stable auxiliary oil supply by dripping the lubricating oil reserved in an oil reservoir on a bearing metal using gravity when forcible oil supply is stopped. CONSTITUTION:An oil reservoir 12 is placed on a split bearing metal 6. When the bearing metal 6 is lubricated forcibly, the lubricating oil flows from an oil feed pipe 4 through an oil passage into the inside of the bearing metal 6, to lubricate the hearing metal 6. When the forcible oil supply is stopped, oil supply to the inside of the bearing metal 6 is cut off and the lubricating oil is the oil reservoir 12 is dripped into the inside of the bearing metal 6 through the oil passage 13 due to gravity to lubricate the bearing metal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bearing lubrication system for a horizontal axis rotating electrical machine that uses both a forced lubrication system and an auxiliary lubrication system, and particularly relates to the structure of the auxiliary lubrication system.

[Conventional technology]

An auxiliary lubrication device is often used in combination with a forced lubrication device as a bearing lubrication device for a horizontal axis rotating electric machine. This is because, even if oil cannot be supplied due to a failure in the piping system, the auxiliary oil supply device continues to supply lubricating oil to the bearing metal of the rotating electrical machine, which is still rotating, until the rotating electrical machine stops.

The structure of a conventional bearing oil supply device will be explained with reference to FIGS. 2 to 4. Figure 2 is a front view of the bearing lubrication system, with bearing stand 1 and cover 2.
An oil tank and a shaft metal (not shown) are housed in the space covered by the space, and the rotating shaft 3 passes through it. Then, lubricating oil is supplied to the bearing metal from the side via an oil supply pipe 4 by an electric oil supply pump (not shown). After lubricating the bearing metal, the lubricating oil is stored in the oil tank, and excess lubricating oil is discharged from the oil drain pipe 5. 3 and 4 are side sectional views of FIG. 2, where FIG. 3 shows an auxiliary oil supply means using an oil ring, and FIG. 4 shows an auxiliary oil supply means using an oil disk.

In FIG. 3, lubricating oil from the oil supply pipe 4 is supplied to the upper side of the two-split bearing metal 6 in the cover 2 through the oil pipe 7 to lubricate the inside of the bearing metal 6. After lubrication, the lubricating oil falls from the bottom of the bearing metal 6 and is stored in an oil tank (not shown).The oil ring 8 hooked on the zero-rotation shaft 3 slides on the upper surface of the rotating rotary shaft 3. The lubricating oil stored in an oil tank (not shown) is scraped up and supplied to the inside of the bearing metal 6 and the upper surface of the rotating shaft 3.

This state continues as long as the rotating shaft 3 is rotating even if the forced lubrication stops, and the fourth
In the figure, this auxiliary oil supply is provided by an oil disc 9. That is, the oil disk 9 is fixed to the rotating shaft 3, and an oil receiver 10 is provided on the upper part of the bearing metal 6.

The bottom surface of the oil receiver 10 communicates with the inside of the bearing metal 6 through an oil supply hole 11.

As the rotating shaft 3 rotates, the oil disk 9 also rotates, and the lubricating oil stored in an oil tank (not shown) is scooped up and falls into the oil pan IO. The lubricating oil in the oil pan 10 passes through the oil supply hole 11 and is supplied to the inside of the bearing metal 6. This state continues even if forced lubrication is stopped as long as the rotating shaft 3 is rotating, and functions as auxiliary lubrication.

(Problems to be Solved by the Invention) Since the above-mentioned auxiliary lubrication device is constantly operating even when forced lubrication is being performed (when auxiliary lubrication is not required), the oil ring type does not cause wear or damage to the oil ring 8 itself. In the oil disk method, the oil is scraped up, causing an increase in air bubbles in the oil or the generation of oil mist, both of which are undesirable phenomena.

In view of the above-mentioned problems, an object of the present invention is to provide an auxiliary lubrication device that does not cause a change in the state of lubricating oil or wear or damage the structure even if the auxiliary lubrication device operates when it is unnecessary. It is about providing.

[Means to solve the problem]

In order to achieve the above-mentioned object, this invention supplies lubricating oil to the bearing metal by a forced lubrication device during normal operation, and supplies lubricating oil to the bearing metal by an auxiliary lubrication device when the forced lubrication device stops. The oil tank is arranged above the bearing metal and has a function of storing lubricating oil that is forcibly supplied during normal operation and dripping the stored lubricating oil using gravity when forced lubrication is stopped; It shall have an auxiliary oil supply device consisting of an oil passage that communicates the bottom part with the inside of the bearing metal and allows free flow of lubricating oil.

[For production]

When forced lubrication is being performed, some of the lubricating oil that is supplied inside the bearing metal flows backwards through the oil supply hole and into the oil tank, and when the tank is full, it overflows and falls into the oil tank. Continue. When the forced oil supply to the bearing metal stops, the lubricating oil filled in the oil tank is dripped by gravity into the bearing metal through the oil supply hole, and acts to lubricate the bearing metal until the rotating electric machine stops. .

〔Example〕

FIG. 1 is a side cross-sectional view of a bearing oil supply system for a rotating electric machine, which is an embodiment of the present invention. Parts having the same functions as the structural parts shown in FIGS. 3 and 4 are given the same reference numerals. , the explanation is omitted. The auxiliary oil supply means in this embodiment are as follows:
An oil tank 12 is placed on the upper side of a bearing metal 6 having a two-part structure. The bearing metal 6 and the oil tank 12 are attached by a method such as a snap-locking method. The bottom surface of the oil tank 12 and the inside of the bearing metal 6 communicate with each other through an oil passage 13, so that lubricating oil can flow in either direction. In such a structure, when the bearing metal 6 is lubricated by forced oiling, lubricating oil flows from the oil supply pipe 4, passes through the oil passage 7, and is supplied to the inside of the bearing metal 6.

This oil supply lubricates the bearing metal 6, and a portion of the oil flows backward through the oil passage 13 and flows into the oil tank 12. If this state continues and the oil tank 12 is filled, the lubricating oil will overflow and fall into an oil tank (not shown), so the oil tank 12 will always be full while forced lubrication is being performed. When forced lubrication is stopped, the supply of lubricating oil to the inside of the bearing metal 6 is cut off, so the lubricating oil in the oil tank 12 flows through the oil passage 13 by gravity and drips into the inside of the bearing metal 6, providing a lubricating effect. will be held. That is, it performs an auxiliary lubrication function as a backup when forced lubrication is stopped.

〔Effect of the invention〕

According to this invention, as an auxiliary lubrication device, lubricating oil that is forced to be supplied is always stored in an oil tank, and when forced lubrication is stopped, the lubricating oil stored in the oil tank is dripped onto the bearing metal using gravity. Therefore, there are no moving parts in the structural parts, only stationary parts, and there is no wear or damage to structural parts or changes in oil quality due to stirring of the lubricating oil, which were problems in the past, and stable auxiliary lubrication is now possible. Ta.

[Brief explanation of the drawing]

Figure 1 is a side cross-sectional view of a bearing oil supply system for a rotating electric machine which is an embodiment of the present invention, Figure 2 is a front view of a conventional bearing oil supply system, and Figure 3 shows an oil ring system as a means for supplementary oil supply. It also serves as a conventional bearing oil supply! Figure 4 is a side sectional view of the conventional bearing feed kjA2, which uses an oil disc system as the auxiliary oil feeder means.

Claims (1)

[Claims] 1) In a bearing lubrication system for a rotating electrical machine, a forced lubrication device supplies lubricating oil to the bearing metal during normal operation, and an auxiliary lubrication device supplies lubricating oil to the bearing metal when the forced lubrication device stops. an oil tank that stores lubricating oil that is forcibly supplied during normal operation and drips the stored lubricating oil using gravity when forced lubrication is stopped; and the bottom of the oil tank and the inside of the bearing metal. 1. A bearing oil supply device for a rotating electric machine, comprising an auxiliary oil supply device comprising an oil passage through which lubricating oil can freely flow.