SU832237A1 - System for oil supplying into friction assemblies and actuating mechanisms - Google Patents

Description

(54) OIL SUPPLY SYSTEM OF FRICTION KNOTS AND EXECUTIVE MECHANISMS

The invention relates to oil supply systems, mainly friction units and actuators of turbine units and other equipment of thermal and nuclear power plants. A known system for lubricating the components of steam turbine units, containing the main tank, pumps, coolers, intermediate pressure tank between the main tank and the pump, connected to the pressure lines after the cooler. The disadvantages of this system are large suction and discharge lines, large suction and discharge lines. The number of joints, connectors, valves and fittings in these lines is high, the pressure drop of oil in the cooler is soiled and oil is lost in the system, which significantly reduces the reliability of the oil supply. Also known is the oil supply system of the friction units and actuators, mainly steam turbines, containing the main and pressure tanks with nozzles, between which a pump with suction and pressure lines, a cooler, a lubrication line and an oil overflow line 2 are connected. the number of working, backup and emergency equipment, valves and fittings inevitably leads to a lengthening of the supply line, an increase in the number of joints and connectors and is the reason for their lack of reliability. Possible violation of the density and tightness of the oil pipelines, connectors, valves, sealings of the cooler tube plates (due to a large pressure drop between oil and cooling water) breakdowns and equipment replacement, valves are associated with permanent or periodic losses of oil from the oil system, oiling equipment, cooling and waste waters of inland waters, rivers and canals. The purpose of the invention is to increase the reliability and efficiency of environmental protection. This goal is achieved by the fact that the system is equipped with an intermediate tank connected to the discharge line with an overflow line, in which a cooler is included, the branch pipes are placed inside the tanks and equipped with glasses.

holes that cover them with a gap, and holes are made in the bottoms and walls of the pressure and overflow lines. The intermediate tank overflow line is connected to the pump’s suction line, and the suction and pressure nozzles are located above the working oil level in the tanks.

FIG. 1 is a schematic diagram of the oil supply system; FIG. 2 - the same, with an additional overflow line and water lock ..

Pump 1 communicates with the main tank 2 through a vertical pipe 3 placed with a gap in the glass 4 and suction line 5. The pressure line 6 of the pump 1 is connected to the pressure tank 7, the pressure pipe 8 of which is placed in the glass 9, the pipe 10 feed in the glass 11 , and the overflow pipe 12 is in glass 13. The working oil level 14 is set in the pressure tank 7. The pressure tank 7 by the supply line 15 is in communication with the lubrication unit 16, for example a turbine bearing. The main tank 2 through the overflow line 17 and the overflow pipe 12, between which the hydraulic lock 18 is placed, is connected to the pressure tank 7. In the glass 13, a side opening 19 is placed between the working level 14 and the lower allowable level 20.

An intermediate tank 22 is connected to the oil discharge line 21 from the bearings 16, whose overflow pipes 23 are located with a gap in the cups 24. Coolers are installed on the overflow lines 25 of the intermediate tank 22, and overflow lines 27 are connected to the main tank 2 and to the suction line 5 pump 1. The glass 9 is filled with a hole 28, and the suction line 29 is connected to the bottom 30 of the glass 4 and the outlet 12 of the overflow after the hydraulic lock 18. The glasses 4,9, 11,13 and 24 are made removable, are located the bottoms 30 up and are installed with annular gaps between them and pipes 3,8,10,12 and 2 3

The intermediate tank 22 is located above the main tank 2 by the value of the hydraulic resistance of the oil channel of the cooler 26 at the nominal flow rate, expressed in units of height of the liquid column. Vertical and pressure patruk 3 and 8 are located (removed) above the working level 14 of oil in the tanks

2 and 7.

When the pump 1 is operating, the oil from the main tank through the annular gap between the cup 4 and the branch pipe

3 is fed along the suction and pressure lines 5 and b of pump 1 to the pressure head

tank 7. In order to maintain the supply, the pressure tank 7 contains a pressure connection 8 with a cup 9 enclosing it, a delivery connection 10

with glass 11 and overflow pipe 12 with glass 13. Glass 9 at discharge port 8 prevents free knocking out and jet oil outflow in the gas-air atmosphere of tank 7, intensive mixing of oil with air and its pollution.

Under normal operating conditions, a certain operating oil level 14 is maintained in the pressure tank 7, under the action of which it is supplied to the bearing 16 and other consumers (lubrication unit) through the supply nozzle 10 and supply line 15. Under the operating conditions and emergency situations, takan 11 limits the content of air and other impurities in the oil in front of the bearing 16, the formation of a bore and prevents disruption of the supply.

Reducing oil consumption when changing the operating mode of the installation, which is equipped with the proposed oil supply system, overflows the pressure tank 7 and drains it from the overflow pipe 12 through the overflow line 17 to the main tank 2 The hydraulic lock 18 (figure 2) in the vertical section of the overflow line 17 keeps it closed the volume of the overflow line 17 and the nozzle 12 of the overflow is a stable vacuum due to the removal of air bubbles by the flow The oil is drained until the air penetrates through the holes 19 in the glass 13 and the vacuum is dropped in the overflow pipe 12.

The heated oil used in bearings 16 enters the intermediate tank 22 via the discharge line 21, is sucked from impurities and through the overflow pipe 23 via the overflow line 25 through the cooler 26 is discharged into the main tank 2. After the cooler 26 through the overflow line 27 (Fig.2) can flow directly to suction line 5 of pump 1.

If a malfunction occurs in the pressure line 6 or in the pump 1, an additional backup system is turned on, and the pressure line 6 is lifted out of service by lifting the removable cups 4 and 9 of the pipes 3 and 8. Similarly, these issues are resolved in the event of faults in chillers 26 and lines 25 and 27 of overflow.

The removal of oil from the line section and equipment removed to the reserve, if it is necessary to repair it, is carried out by using known drainage systems or drain plugs with raised, removable cups of pipes connecting the area. Performing an overstory 28 in the bottom of 30 cup 9 prevents the occurrence of the opposite

overflow of oil from the pressure tank 7 when the pump 1 stops and eliminates the need to lift the glass 9 in the event of a malfunction in the pressure line b. After the shutdowns associated with the discharge of oil from the pressure line b and the main tank 2, the charging of the suction line 5 and the vertical nozzle 3 is simplified by making the suction line 29 connecting the cup 4 to the vertical section of the overflow line 17.

Branch pipes 3,8,10 / 12 and 23 tanks 2,7 and 22 with removable glasses 4,9, 11, 13 and 24 provide normal

operation and repair of equipment and components of the oil supply system) served as valves such as valves, gate valves, check valves (a glass with a hole in the wall or bottom). This reduces the loss of oil through the connector, the loss of pressure and the length of the supply line, greatly simplifying the circuit. In addition, removable cups on the nozzles prevent additional jet aeration, oil contamination, funnel formation and ensure systematic removal of contaminated portions along the overflow line.

Installing an intermediate tank with a cooler in its overflow line allows to minimize the pressure of the oil and the cooling medium in the cooler, eliminate pressure pulsations affecting the density of the heat exchange element of the cooler, reduce the likelihood of accidental destruction, and therefore prevent contamination of the surrounding

environment and improve the reliability of the oil supply unit.

Claims (3)

1. An oil supply system for friction units and actuators, mainly steam turbines, containing a main and pressure tanks with nozzles, between which it is included 0 a pump with suction and pressure lines, a cooler, lines for draining and supplying lubrication units and an overflow line for oil, in order to increase reliability and 5 of environmental protection efficiency, the system is equipped with an intermediate tank connected to the discharge line with a overflow line, in which a chiller is included, the branch pipes are placed inside 0 tanks and are equipped with glasses, covering them with a gap, and in the bottoms and walls of glasses of pressure and overflow lines holes are made. 2. The system according to claim 1, with the t of l ica yusch and with the fact that the overflow line 5, the intermediate tank communicates with the pump suction line. 3. The system according to claim 1, which means that the suction and pressure pipes are located 0 VlEe working level of oil in the tanks. Sources of information taken into account in the examination 1. Author's certificate of the USSR 375443, cl. F 16 N 7/38, 1973. five 2. Oil supply system of the turbine unit of 500 MW. Kharkov Turbine Plant, drawing B-82D1, 1967. P1t302g Qii / 2L Z4 30 jif 30 30   / / /five FIG. 2