JPH02150598A - Bearing high pressure oil system with accumulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a bearing high pressure oil device for supplying high pressure oil to a bearing surface when starting or stopping a machine, protecting the bearing from damage, and safely starting or stopping the machine.

[Conventional technology]

FIG. 2 is a system diagram of a conventional bearing high pressure oil system. In FIG. 2, the hydraulic pump 1 is driven by a drive motor to circulate oil from the oil tank 16 to form high pressure oil, and the safety valve 3
High-pressure oil is supplied to a thrust bearing 8 housed in an oil tank 16 through check valves 4 and 5, a suction filter 6, and a line filter 7. The suction filter 6, the hydraulic pump 1. Check valve 4.
Thrust bearing 8 via line filter 7 and check valve 5
The line that supplies oil to is called a high-pressure oil supply line 10. The high pressure oil supplied to the thrust bearing 8 is supplied to the pressure switch 9.
The hydraulic pressure is controlled by 3, and 3 is a safety valve.

[Problem to be solved by the invention]

However, in conventional high-pressure oil systems, when the power supply is lost in a hydroelectric power plant, for example, the drive motor 2 cannot be driven, so high-pressure oil cannot be supplied to the bearing surface, especially when a large-capacity machine is under high load. The problem with bearings was that they could only start the generator. Furthermore, in the process of stopping the generator, there is a problem in that if the in-house power supply is lost, the oil film on the bearings runs out, reducing the life of the bearings. SUMMARY OF THE INVENTION An object of the present invention is to provide a bearing high-pressure oil device that can supply high-pressure oil to a bearing surface even when auxiliary power is lost.

[Means to solve the problem]

The above purpose is to provide a bladder type accumulator connected in parallel to a high-pressure oil supply line, and a solenoid valve and a fixed orifice connected in series to the high-pressure oil supply line. This is accomplished by a bearing high pressure oil system with an accumulator that opens to supply high pressure oil from the bladder type accumulator to the bearing.

[For use]

When the auxiliary power supply is normal, a predetermined amount of high-pressure oil is stored in the bladder type accumulator by the pressure oil pump, so when starting or stopping the machine, even if the auxiliary power supply is lost, the electromagnetic oil connected to the high-pressure oil supply line is The valve can be opened to supply high pressure oil from the bladder type accumulator to the bearing.

【Example】

The present invention will be described in detail below based on the drawings. FIG. 1 is a system diagram of a bearing high pressure oil device with an accumulator according to an embodiment of the present invention. In FIG. 1, the same parts as in FIG. 2 are given the same numbers. In FIG. 1, a hydraulic pump 1 is driven by a drive motor 2 to circulate oil from an oil tank 16 to form high pressure oil, and a check valve 5. There is a high pressure oil supply line 10 passing through a suction filter 6 and a line filter 7. Four bladder-type accumulators 11 connected in parallel to the high-pressure oil supply line 10 and the high-pressure oil supply line 1
Solenoid valve 13 connected in series to 0. Fixed orifice 14
and a check valve 15. The bladder 12 in the accumulator 11 is maintained at a predetermined pressure of N.
During normal operation when auxiliary power is supplied, pressure oil is accumulated in the accumulator 11 by the operation of the pressure oil pump 1 and the drive motor 2. In addition to the high-pressure oil supply line 10 shown in Figure 1, a high-pressure oil supply line (not shown) is connected in parallel, and when starting or stopping the machine when the auxiliary power supply is normal, the high-pressure oil supply line (not shown) is connected in parallel. Pressure oil is supplied to the thrust bearing 8. When the auxiliary power supply is lost, the electromagnetic valve 13 can be opened to supply pressure oil from the accumulator 11 to the thrust bearing 8 even if the pressure oil pump 1 and the drive motor 2 do not operate. 3 is a safety valve, 9 is the high pressure oil supply line 10
This is a pressure switch that adjusts the oil pressure. The hydraulic pressure and N2 gas pressure inside the bladder 12 are adjusted by the safety valve 3, and check valves 5° 17 are installed at both ends of the high-pressure oil supply line 10 to which the accumulator 11 is connected. Pressure drop due to oil leakage is prevented. The maximum supply of pressure oil can be adjusted by setting the fixed orifice 14 whose oil flow resistance has been measured in advance. For example, if the required minimum pressure is 170kg/c+n''G, the required oil amount is 121!, and 7 minute bearings are equipped with 4 accumulator cylinders with a capacity of 1001. The maximum working pressure is 250kg/cm2G, there will be no pressure replenishment from the pump inside the device. In the case of a water turbine generator that can refuel for approximately 6.3 minutes, the time required for high-pressure refueling is approximately 1 to 1.5 minutes per startup, so using this device, pump 1 can be refueled without driving. The main engine can be started safely 4 to 6 times in succession. When the auxiliary power source is normal, the hydraulic pump 1 is driven to accumulate high-pressure oil in the accumulator 11, and the oil is discharged from the accumulator 11. The thrust bearing 8 can be refueled by releasing high pressure oil.

【Effect of the invention】

According to this invention, a bladder-type accumulator connected in parallel to a high-pressure oil supply line is installed, and high-pressure oil is accumulated in the accumulator when the auxiliary equipment power supply is normal, and when the machine is started or stopped, the high-pressure oil stored in the accumulator is by emitting
High-pressure oil can be supplied to the bearing from a solenoid valve and a fixed orifice connected in series to the high-pressure oil supply line. Therefore, even when the auxiliary power supply is lost, the machine can be started or stopped safely.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a bearing high pressure oil system with an accumulator according to an embodiment of the present invention, and FIG. 2 is a system diagram of a bearing high pressure oil system according to a conventional example. 1: Hydraulic pump, 2: Drive motor, 8-nilus thrust bearing,
lO: High pressure oil supply line, 11: Accumulator, 12
Nibrada, 13: Solenoid valve, 14: Fixed orifice, 16
:Oil tank.

Claims (1)

[Claims] 1) In a high-pressure oil device that supplies high-pressure oil from an oil tank to a bearing by a high-pressure oil supply line having a hydraulic pump and a drive motor, a bladder-type accumulator connected in parallel to the high-pressure oil supply line and the high-pressure oil supply line A high-pressure bearing with an accumulator, characterized in that a solenoid valve and a fixed orifice are connected in series, and when the machine is started or stopped, the solenoid valve is opened to supply high-pressure oil from the bladder-type accumulator to the bearing. oil equipment.