SU1276860A1 - Bearing unit - Google Patents

Abstract

The invention relates to the field of electromagnetization, in particular, to support bearings of turbo-generator FP. 1 of tori with forced lubrication, and allows to increase reliability and efficiency. In emergency mode, when the supply of oil from the oil supply source is stopped, the supply of the working area of the bearing to the oil is dried out from the tank. In the release of oil from the cavity of the oil inside the tank, a vacuum is formed. The valve under the effect of the atmospheric pressure difference, which is inside the overflow pipe 8, and the pressure inside the tank rises and, opening the windows, allows sufficient air to pass from the pipe 8 to the tank to fill the cavity inside the tank above the oil layer, break the vacuum and provide free flow of oil from the tank into the working area of the bearing. 3 il. (L 1} t of oil source 5geni to О5 00 О5

Description

The invention relates to electrical engineering, in particular to the reference helixes of turbine generator set with forced lubrication.

The purpose of the invention is to increase reliability and economy by eliminating the formation of a vacuum in the emergency lubrication tank and ensuring the free flow of oil from the tank into the emergency mode with low oil consumption through the overflow device during normal operation.

FIG. 1 shows the proposed sub1IPNIC node, general view; in fig. 2): 1 I in FIG. one; in fig. 3 node II in FIG. one.

The subsurface unit consists of a liner 1, on which the rotor 2 rests, the kriipki 3 of the underbody case, the stand (not shown), the labyrinth oil traps 4, the hermetic case of the emergency lubricant tank 5 installed on the mat of the elevator, and the pressure points of the tank under pressure; 1 pipe 6, connected to a source of low supply, metering pipe 7, connected to the working area of the ninpik nodes - the gap between the liner and the rotor nanfi. a single pipe 8 connected to a carter.m 9 of a nodpigram and a closed clan. 10. The valve consists of a cylinder 0 and with windows 12 entering the overflow pipe with a gap 13 to allow free movement inside the pipe 8 rigidly connected to the lid - flat Krypzha 14 with a throttling hole 15, the outer diameter of which is more than the outer diameter of the overflow pipe, forming protruding edges 16 and ensuring at the same time tight closure of the latter when the clamp is on the end of the pipe. Labyrinth oil mounts embrace the rotor with a gap 17. The bearing has a discharge pipe 18 through which the crankcase 9 (internal cavity) of the bearing is connected to the atmosphere.

The prevention of excessive valve lift and valve escape from the pipe is ensured by choosing the distance between the end of the overflow pipe 8 and the bottom of the tank body 5, which should be less than the valve length.

The hole 15 in the lid 14 is selected from the condition of limiting the oil flow through the overflow pipe to a size of 2-3% of the oil flow through the bearing.

In the normal operating mode, when the oil under pressure from the pump comes from the source of low-pressure gas injection into the tank through the discharge pipe 6 and continuously passes into the working head of the pump through the dosing pipe 7, the valve 10 under the action of gravity and oil pressure in the tank is in the lower position and tightly closes the pipe 8, since the windows 12 in the cylinder 11 are not closed by the pipe 8 and the lid

14. The oil flow through the overflow pipe 8 in this mode is determined by the size of the hole 15 in the cap 14 of the valve 10 and is characterized by a small value due to the small size of the hole 15.

In emergency mode, when the supply of oil from the supply source stops, oil is supplied from the tank under the influence of gravity of the oil, the valve 10 is released under the influence of atmospheric pressure inside the overflow the pipes 8, due to the connection with the atmosphere, through the crankcase, drainage, the pipe and the gaps between the oil traps and the shaft, and the pressure inside the tank rises and, opening the windows 12, passes air from the pipe 8 into the tank in an amount sufficient to fill the cavity inside the tank above the oil layer, break the vacuum and

0 ensure free flow of mael from the tank into the working area of the support.

Depending on the magnitude of the pressure difference in the pipe 8 and in the tank, i.e. on the magnitude of the vacuum in the tank, it is determined the speed and height of the lift valve 10 and, therefore, the size of the opening of the windows 12 in the valve, thus ensuring regulation of the rate at which the oil flows out of the tank into the working area of the pad. At the final stage of emergency mode, when the rotation speed

 the rotor and oil consumption are significantly reduced, and the pressure difference in the pipe 8 and in the tank is not enough to lift the valve 10, the air entering the tank is surrounded by an opening 15 of small diameter in the valve 14.

5The advantage of the device is to improve the reliability and efficiency by eliminating damage to the liner and the axle rotor in emergency mode and reducing the electric power consumption due to a decrease in oil consumption during normal operation.

Claims (1)

Invention Formula A bearing unit, in particular, a turbo-generator, containing an insert enclosed in a building consisting of a sink and a lid, labyrinth oil traps, covering the air gap with a gap, an emergency lubrication tank with an overflow pipe disposed inside; through the carcter, and the discharge pipe, characterized in that, in order to increase reliability and efficiency, it is equipped with an installed on the overflow pipe with a valve made in the form of a hollow cylinder with side windows, covered with an overflow gap 5 with a pipe and rigidly connected with a lid made with a throttling hole and a protruding edge in contact with the end of the overflow pipe. four