JP2011208510A - Method and device for supplying lubricating oil for turbine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a lubricating oil with no problem by adapting to an increase in the size of a turbine power generation plant while suppressing an increase in the size of a lubricating oil supply facility.SOLUTION: A booster device 26 is immersed in the lubricating oil o stored in an oil tank 22. The lubricating oil o discharged from a main oil pump 24 direct-coupled to a rotor shaft 14a drives a booster turbine 28, and the low-pressure lubricating oil o discharged from the booster turbine 28 is supplied to a bearing device such as rotor shafts 12a, 14a. The lubricating oil o is returned to the main oil pump 24 by a booster pump 30, and a part of the lubricating oil o is supplied to the bearing device through a bypass pipe 60. The discharge pressure of the main oil pump 24 is set to a discharge pressure capable of supplying the part of the discharged lubricating oil to the outlet side lubricating oil of the booster turbine through a bypass flow passage while maintaining a lift which allows the lubricating oil discharged from the booster pump to reach the main oil pump by the rotational torque of the booster device 26.

Description

  The present invention relates to a lubricating oil supply method and apparatus for supplying lubricating oil to a turbine rotor shaft in a turbine plant or supplying hydraulic oil for operating a hydraulic actuator provided in the turbine plant.

  For turbine plants such as steam turbines and gas turbines, lubrication oil is supplied to rotor shafts and generator bearings, and hydraulic oil is supplied to hydraulic actuators that drive hydraulic control systems such as control valves and servo valves. Oil supply facilities are provided. The configuration of this lubricating oil supply facility will be described with reference to FIG.

  In FIG. 3, in the turbine power plant 100, the rotor shafts 102a and 104a of various high-pressure and low-pressure turbines 102 and 104 and the rotating shaft 106a of the generator 106 are connected in series. The lubricating oil supply facility 110 includes an oil tank 112 in which the lubricating oil o is stored, a non-volumetric pump such as a centrifugal pump, a main oil pump 114 whose rotation shaft is directly connected to the rotor shaft 104a, and the lubricating oil as a rotor. It comprises a bearing device for a shaft and a rotating shaft, and a lubricating oil supply system that supplies the hydraulic actuator.

  The oil tank 112 is provided with two ejector devices 116 and 118 and an auxiliary electric pump 120 driven by a motor 122 while being immersed in the lubricating oil o. A small-flow and high-pressure lubricating oil is discharged from the main oil pump 114 driven by the rotor shaft 104a to the pipe 124. The lubricating oil is supplied as hydraulic oil for a hydraulic actuator (not shown) through a pipe 126 in which a check valve 128 is partially provided. Other lubricating oil is supplied as drive fluid to the ejector devices 116 and 118 in the oil tank 112.

  The large-flow / low-pressure lubricating oil o discharged from the ejector device 116 passes through the conduit 130 provided with the check valve 131, is cooled by the oil cooler 132, and impurities are removed by the filter 134. Thereafter, the lubricating oil o is supplied to bearing devices (not shown) of the rotor shafts 104a and 106a, the rotating shaft 106a of the generator 106, and the like. In the bearing device, a fluid bearing in which a lubricating oil film is interposed between the rotating shaft and the bearing pad is formed. In the lubricating oil o, impurities such as metal powder and oil carbide are mixed. Since these contaminants bite into the rotating shaft and the bearing pad and damage them, it is necessary to remove them with the filter 134.

  On the other hand, the lubricating oil o discharged from the ejector device 118 is supplied to the main oil pump 114 through the pipe line 136 in order to continue the operation of the main oil pump 114. In general, in the turbine power plant, the turbines 102 and 104 and the main oil pump 114 are placed above the oil tank 112, so that the ejector devices 116 and 118 have a lift that allows the lubricating oil o to reach the main oil pump 114. Needed.

  The flow rate of the lubricating oil o discharged from the main oil pump 114 is insufficient until the turbines 102 and 104 become rated operation after starting, or during low speed operation such as turning operation. In order to assist the discharge flow rate of the main oil pump 114, the electric pump 120 is driven, and the lubricating oil o is supplied to the pipelines 130 and 136 via the pipeline 138 provided with the check valve 140. Patent Document 1 discloses a lubricating oil supply facility for a steam turbine provided with an ejector device in an oil tank.

  Turbine power generation plants have become larger year by year as electric power demand increases. Therefore, a lubricating oil supply facility that can supply a large amount of lubricating oil has become necessary. Further, since the filter 134 is provided in the pipe line 130, it has become necessary to increase the lift of the ejector device 116. Furthermore, when a large filter is provided in the pipe line 130 with an increase in the flow rate of the lubricating oil, the pressure loss increases, so the discharge pressure of the ejector device 116 needs to be increased.

  However, the ejector device has a limit in discharge pressure, and it has been difficult to cope with the trend of increasing the flow rate and pressure. Further, the specifications of the ejector device are determined, and it has been difficult to respond flexibly to a wide operation range.

  Therefore, it has been proposed to use a booster device including a booster turbine and a booster pump sharing a rotating shaft instead of the ejector device. Patent Document 2 discloses a lubricating oil supply facility provided with such a booster. Hereinafter, the lubricating oil supply facility disclosed in Patent Document 2 will be described with reference to FIG.

  In FIG. 4, a turbine power plant 200 includes a turbine 202, rotor shafts 204a and 204b connected in series, and bearing boxes 206a to 206c including bearings 208a to 208c that support the rotor shafts. . Lubricating oil supply equipment 210 includes an oil tank 212, a main oil pump 214 directly connected to the rotor shaft 204 a, and a pressure increasing device 216 immersed under the surface of the lubricating oil o stored in the oil tank 112. ing. The booster 216 includes a booster turbine 218 that shares a rotating shaft and a booster pump 220.

  When the turbine power plant 200 is started, the oil pump 222 for supplementarily supplying the bearing oil and the hydraulic fluid of the control mechanism is operated to guide the lubricating oil o to the booster turbine 218. The booster turbine 218 is rotated by being given a driving force by the energy of the lubricating oil o, and drives the booster pump 220 directly connected thereto. The booster pump 220 supplies the suction oil of the main oil pump 214 via the suction oil pipe 224. The booster pump 220 needs a head that allows the lubricating oil o to reach the main oil pump 214 on the upper floor.

  Lubricating oil o that has been depressurized by working in the booster turbine 218 is supplied to the oil cooler 228 through the oil pipe 226, and is heat-exchanged with the cooling water introduced from the cooling water pipe 230 by the oil cooler 228. To be cooled. The cooled lubricating oil o passes through the oil pipe 232, passes through the bearing oil supply mother pipe 234, passes through the bearing supply pipes 236a to 236c, and is supplied to the bearings 208a to 208c. The supplied lubricating oil o temporarily retains in the bearing housings 206a to 206c after lubricating and cooling the bearing, and then passes through the return oil pipes 238a to 238c and the return oil mother pipe 240, respectively. It is returned to the oil tank 212.

  The main oil pump 214 discharges the lubricating oil o as the rotor shaft 104 a rotates, and the discharged lubricating oil o is introduced into the booster turbine 218 via the discharge pipe 242. Note that when the turbine power plant 200 enters a rated operation, the oil pump 222 is stopped. The two oil pumps 244 connected to the oil pipe 226 supply the lubricating oil o to the bearings 208a to 208c and the like when the turbine power plant 200 is stopped. Partition plates 246 and 248 are provided in the oil cooler 228. The partition plate forms a U-shaped flow path between the cooling water and the lubricating oil o, thereby increasing the contact area between the cooling water and the lubricating oil o and improving the heat exchange efficiency.

JP 58-113508 A JP-A 61-268367

  Since the booster 216 shown in FIG. 4 can obtain a higher discharge pressure than the ejector device, it can cope with an increase in the size of the turbine power plant. However, when the turbine is replaced with a large machine in order to increase the power generation amount of the turbine power plant, it is necessary to increase the usage amount of the lubricating oil, and therefore it is also necessary to change the specifications of the main oil pump. Since the main oil pump is directly connected to the rotor shaft, the rotational speed is limited. In such a case, it is common to replace the pump with a structure capable of increasing the flow rate without changing the discharge pressure of the main oil pump.

  However, in order to increase the flow rate, it is necessary to lengthen the impeller of the pump, and the main oil pump must be enlarged. When the flow rate of the main oil pump is increased, the booster turbine must be increased in size, and the entire lubricating oil supply facility must be increased in size, resulting in a high cost.

  In view of the problems of the prior art, the present invention makes it possible to increase the flow rate of the lubricating oil in response to the increase in the size of the turbine power plant while suppressing the increase in the size of the lubricating oil supply facility. The purpose is to prevent the supply of lubricant.

  To achieve this object, a lubricating oil supply method for a turbine according to the present invention includes an oil tank storing lubricating oil, a main oil pump connected to a rotor shaft of the turbine, and a liquid level below the lubricating oil. And a booster composed of a booster turbine and a booster pump that share a rotating shaft, supply lubricating oil discharged from the main oil pump as hydraulic oil to a hydraulic actuator in the turbine plant, and Lubricating oil is supplied to the booster turbine to drive the booster turbine, and the lubricating oil after driving the booster turbine is supplied to the bearing device of the rotor shaft, and the lubricating oil is returned to the main oil pump by the booster pump. In the turbine lubricating oil supply method, a part of the lubricating oil discharged from the booster pump is partly passed through the bypass channel. The flow rate of the lubricating oil supplied to the bearing device is increased by combining with the lubricating oil on the outlet side of the bottle, and the discharge pressure of the main oil pump is increased by the rotational torque of the booster pump. The discharge pressure is set so that a part of the discharged lubricating oil can be supplied to the outlet side lubricating oil of the booster turbine through the bypass flow path while maintaining the head that can reach the upper limit.

  In the method of the present invention, a part of the lubricating oil discharged from the booster pump is merged with the outlet side lubricating oil of the booster turbine, so that the flow rate of the lubricating oil supplied to the bearing device is increased. In order to make this possible, the booster device maintains a lift at which the booster pump discharge lubricant can reach the main oil pump, and a part of the discharge lubricant oil is passed through the bypass passage to the outlet side of the booster turbine. Enough rotation torque to be able to be supplied to the lubricating oil. The discharge pressure of the main oil pump is set to a discharge pressure sufficient to exert this rotational torque.

By setting the discharge pressure of the main oil pump to such a discharge pressure, high-pressure lubricating oil can be supplied to the hydraulic actuator and the amount of lubricating oil to the bearing device such as the rotor shaft can be increased. It can cope with conversion.
Further, even if the discharge pressure of the main oil pump is increased, the discharge flow rate does not increase, so that the impeller and casing of the main oil pump and booster turbine are not increased in size. Therefore, the cost is not increased, and the degree of freedom in designing the container and the basic structure for storing the main oil pump can be expanded.

  On the other hand, when the discharge flow rate of the main oil pump is increased, it is necessary to increase the flow path area and the like, which leads to an increase in size of the main oil pump and the booster turbine. According to the method of the present invention, the lubricating oil supply capacity can be improved without increasing the size of the lubricating oil supply equipment, and the turbine power plant can be increased in size.

  In the method of the present invention, the flow rate of the lubricating oil supplied to the bearing device may be adjusted by adjusting the flow rate of the lubricating oil flowing through the bypass passage. Thereby, the flow rate of the lubricating oil supplied to the bearing device can be adjusted over a wide range.

  The turbine lubricating oil supply device of the present invention that can be directly used for carrying out the method of the present invention includes an oil tank that stores lubricating oil, a main oil pump that is connected to and driven by a rotor shaft of the turbine, A booster composed of a booster turbine and a booster pump that are immersed under the surface of the lubricating oil and share a rotating shaft, and the lubricating oil discharged from the main oil pump is used as hydraulic oil in a hydraulic actuator in the turbine plant The lubricating oil is supplied to the booster turbine to drive the booster turbine, and the lubricating oil after driving the booster turbine is supplied to the bearing device of the rotor shaft, and the lubricating oil is supplied to the main oil pump by the booster pump. In the lubricating oil supply device for the turbine, the outlet side flow path of the booster pump and the outlet side flow path of the booster turbine By connecting the bypass flow path and the lift torque of the booster pump so that the discharge lubricating oil of the booster pump can reach the main oil pump, a part of the discharged lubricating oil is passed through the bypass flow path of the booster turbine. A main oil pump having a discharge pressure that can be supplied to the outlet side lubricating oil, and a part of the lubricating oil discharged from the booster pump is passed through the bypass flow path so as to merge with the outlet side lubricating oil of the booster turbine. It is configured.

  In the device of the present invention, high pressure lubricating oil can be supplied to the hydraulic actuator by providing the main oil pump with the discharge pressure. Moreover, since the rotational torque of the booster can be increased, a part of the discharged lubricating oil is used as the lubricating oil on the outlet side of the booster turbine while maintaining the discharge pressure of the booster pump at the head that can supply the lubricating oil to the main oil pump. Can be supplied. Therefore, the amount of lubricating oil supplied to the bearing device can be increased while allowing the main oil pump to continue to operate.

  Further, even if the discharge pressure of the main oil pump is increased, the discharge flow rate does not increase, so that the main oil pump and the booster turbine are not enlarged. Therefore, the size of the lubricating oil supply facility is not increased, the lubricating oil supply capability can be improved at a low cost, and the size of the turbine power plant can be increased.

  In the device of the present invention, it is preferable to provide a throttle mechanism for adjusting the flow rate of the lubricating oil in the bypass flow path. As a result, the amount of lubricating oil supplied to the bearing device can be adjusted over a wide range, and it is easy to cope with an increase in the size of the turbine power plant.

  According to the method of the present invention, an oil tank that stores lubricating oil, a main oil pump that is connected to and driven by a rotor shaft of the turbine, and a booster turbine that is immersed under the surface of the lubricating oil and shares a rotating shaft. And a booster pump comprising a booster pump, and the lubricating oil discharged from the main oil pump is supplied as hydraulic oil to a hydraulic actuator in the turbine plant, and the lubricating oil is supplied to the booster turbine to supply the booster In the turbine lubricating oil supply method in which the turbine is driven and the lubricating oil after driving the booster turbine is supplied to the bearing device of the rotor shaft and the lubricating oil is returned to the main oil pump by the booster pump. Part of the discharged lubricating oil is merged with the outlet side lubricating oil of the booster turbine through the bypass flow path, and the bearing device is While increasing the flow rate of the lubricating oil supplied to the main oil pump, the discharge lubrication of the main oil pump is maintained while maintaining the head where the boosting pump discharge lubricating oil can reach the main oil pump by the rotational torque of the booster. Since a part of the oil is set to a discharge pressure that can be supplied to the outlet side lubricating oil of the booster turbine through the bypass flow path, the turbine can be manufactured at low cost without causing an increase in the size of the lubricating oil supply device. It can cope with the enlargement of power plants.

  According to the device of the present invention, the oil tank storing the lubricating oil, the main oil pump connected to the rotor shaft of the turbine, and the oil immersed in the liquid surface of the lubricating oil share the rotating shaft. A booster composed of a booster turbine and a booster pump, supplying the lubricating oil discharged from the main oil pump as hydraulic oil to a hydraulic actuator in the turbine plant, and supplying the lubricating oil to the booster turbine In the turbine lubrication oil supply device that drives the booster turbine and supplies the lubricating oil after driving the booster turbine to the bearing device of the rotor shaft and returns the lubricating oil to the main oil pump by the booster pump, the booster pump The bypass channel connecting the outlet side channel of the booster turbine and the outlet side channel of the booster turbine, and the rotational torque of the booster The discharge pressure of the star pump discharge oil has a discharge pressure capable of supplying a part of the discharge lubricant oil to the booster turbine outlet side lubricant oil via the bypass flow path while maintaining a head that can reach the main oil pump. A main oil pump, and a part of the lubricating oil discharged from the booster pump is passed through the bypass flow path and merged with the outlet side lubricating oil of the booster turbine. An effect can be obtained.

It is a block diagram of the lubricating oil supply equipment which concerns on one Embodiment of this invention method and apparatus. It is front sectional drawing of the pressure | voltage rise apparatus integrated in the said embodiment. It is a block diagram of the conventional lubricating oil supply equipment. It is a block diagram of another conventional lubricating oil supply equipment.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this embodiment are not intended to limit the scope of the present invention to that unless otherwise specified.

  An embodiment of the method and apparatus of the present invention will be described with reference to FIGS. In FIG. 1, in a turbine power plant 10, rotor shafts 12a and 14a of various high-pressure and low-pressure turbines 12 and 14 and a rotating shaft 16a of a generator 16 are connected in series. The lubricating oil supply facility 20 supplies lubricating oil to the hydraulic actuators and the rotor shafts 12 a and 14 a of the turbine power plant 10. The main oil pump 24 is configured by an oil tank 22 in which the lubricating oil o is stored, a non-volumetric pump such as a centrifugal pump, and the rotating shaft is directly connected to the rotor shaft 14a, and the lubricating oil is supplied to the rotor shaft, the rotating shaft, and the hydraulic pressure. It is comprised with the lubricating oil supply system supplied to an actuator.

  The oil tank 22 is provided with a booster 26 and an auxiliary electric pump 34 driven by a motor 36 in a state immersed in the lubricating oil o. The booster 26 is configured by a booster turbine 28 and a booster pump 30 that are connected by a rotating shaft 32. The main oil pump 24 and the inlet of the booster turbine 28 are connected by a discharge pipe 38. The outlet of the booster turbine 28 and the bearing boxes (not shown) provided on the rotor shafts 12a and 14a and the rotating shaft 16a of the generator 16 are connected by a bearing oil supply mother pipe 40 and bearing oil supply pipes 42a to 42h. Yes.

  The bearing oil supply mother pipe 40 is provided with an oil cooler 44 that cools the lubricating oil o and a filter 46 that removes impurities from the lubricating oil o. An oil pipe 48 that supplies hydraulic oil to a hydraulic actuator (not shown) that drives a hydraulic control system such as a control valve and a servo valve is connected to the discharge pipe 38 upstream of the oil cooler 44. The oil pipe 48 is provided with a check valve 50. The bearing oil supply mother pipe 40 and the outlet of the electric pump 34 are connected by an oil pipe 52 provided with a check valve 54.

  An oil pipe 56 that supplies lubricating oil o from the booster pump 30 to the main oil pump 24 is provided between the outlet of the booster pump 30 and the main oil pump 24. A check valve 58 is interposed in the oil pipe 56 and an oil pipe 52 is connected thereto. On the downstream side of the check valve 58, the oil pipe 58 and the discharge pipe 38 are connected by a bypass pipe 60. The bypass pipe 60 is provided with a flow restricting mechanism including an orifice 62.

  Next, the configuration of the booster 26 will be described with reference to FIG. In FIG. 2, the booster turbine 28 includes a casing 64 having an inlet 66 and an outlet 68 for the lubricating oil o, and an impeller 70 provided inside the casing 64. The booster pump 30 includes a casing 72 having an inlet 74 and an outlet 76 for the lubricating oil o, and an impeller 78 provided inside the casing 72.

  The impeller 70 and the impeller 78 are connected by a rotating shaft 80. The impeller 70 is given a driving force by the energy of the lubricating oil o supplied from the main oil pump 24, and the impellers 70 and 78 and the rotary shaft 80 rotate together in the direction of arrow a. When the impeller 78 rotates in the direction of arrow a, the lubricating oil o is sucked from the inlet 74 and discharged from the outlet 76 to the oil pipe 56. The casing 64 and the casing 72 are connected by a cylindrical casing 82.

In such a configuration, a part of the high-pressure lubricating oil o discharged from the main oil pump 24 is sent to the hydraulic actuator as hydraulic oil through the oil pipe 48. The hydraulic actuator is
Drives hydraulic control systems such as control valves and servo valves.
The remaining lubricating oil o is sent to the booster turbine 28 to rotate the booster turbine 28 in the direction of arrow a. The lubricating oil o after the work of rotating the booster turbine 28 becomes a low pressure and is discharged to the bearing oil supply mother pipe 40. The lubricating oil o discharged to the bearing oil supply mother pipe 40 is cooled by the oil cooler 44, and impurities are removed by the filter 46. Thereafter, the lubricating oil o is supplied to bearing devices such as the rotor shafts 12a and 14a and the generator shaft 16a.

  Note that the flow rate of the lubricating oil o discharged from the main oil pump 24 is insufficient during the period from the start of the turbines 12 and 14 to the rated operation or when performing low speed operation such as turning operation. In order to assist the discharge flow rate of the main oil pump 24, the electric pump 34 is driven. The lubricating oil o discharged by the electric pump 34 is supplied to the bearing oil supply mother pipe 40 and the oil pipe 56 via the oil pipe 52.

When the impeller 78 rotates in the direction of arrow a together with the impeller 70, the lubricating oil o stored in the oil tank 22 is drawn from the inlet 74 and discharged from the outlet 76 to the oil pipe 56. The lubricating oil o discharged to the oil pipe 56 is sent to the main oil pump 24 in order to continue the operation of the main oil pump 24.
Usually, since the main oil pump 24 is placed above the oil tank 22, the booster pump 30 needs a head for causing the lubricating oil o to reach the main oil pump 24.

Part of the lubricating oil o discharged from the booster pump 30 joins the lubricating oil o flowing through the bearing oil supply mother pipe 40 through the bypass pipe 60. The discharge pressure of the main oil pump 24 increases the rotational torque of the booster 26 so that the set circulating amount of the lubricating oil o discharged from the booster pump 30 can be returned to the main oil pump 24. And a discharge pressure capable of supplying the remaining lubricating oil o to the bearing oil supply mother pipe 40.
Since the main oil pump 24 has a discharge pressure that satisfies such a condition, the main oil pump 24 can be operated in a steady manner, and a part of the lubricating oil o is supplied to the bearing oil supply mother pipe 40 to thereby provide a bearing device. The amount of lubricating oil supplied to can be increased.

  Since the bypass pipe 60 is provided with a flow path restriction mechanism including the orifice 62, the flow rate of the lubricating oil o flowing through the bypass pipe 60 can be adjusted by the orifice 62.

  According to this embodiment, the discharge pressure of the main oil pump 24, the amount of lubricating oil discharged from the booster pump 30, not only the amount of lubricating oil necessary for steady operation of the main oil pump 24, but also a part of it are used as bearings. Since the discharge pressure is required to obtain the rotational torque of the booster 26 that can be supplied to the oil supply mother pipe 40, the amount of lubricating oil sent to the bearing device can be increased. Therefore, it is possible to cope with an increase in the demand for the amount of lubricating oil due to the enlargement of the turbine power plant 10.

Further, even if the discharge pressure of the main oil pump 24 is increased, the discharge flow rate of the main oil pump 24 does not increase. Therefore, the impeller of the booster turbine 28 that receives the main oil pump 24 and the lubricating oil o discharged from the main oil pump 24. There is no need to enlarge the casing or casing. Therefore, even if the turbine power plant 10 is increased in size, it is not necessary to modify the existing lubricating oil supply facility to increase in size, and the facility cost is not increased.
Further, since the bypass pipe 60 is provided with a flow path restricting mechanism including the orifice 62, the amount of lubricating oil sent to the bearing device can be adjusted to be the optimum amount of lubricating oil for the bearing device.

For example, in the conventional lubricating oil supply facility 210 shown in FIG. 4, when the discharge flow rate of the lubricating oil of the main oil pump 214 is 11,000 L (liter) / min and the discharge pressure is 10 kg / cm ² , the booster turbine 218 The lubricating oil discharge flow rate is 11,000 L / min.
When it is desired to increase the discharge flow rate of the booster turbine 218 to 14,000 L / min due to an increase in the size of the turbine power plant 200, the turbine oil plant 200 is usually replaced with a main oil pump and a booster turbine having a discharge flow rate of 14,000 L / min. Therefore, the main oil pump and the booster turbine are increased in size and the cost is increased.

On the other hand, in the lubricating oil supply facility 20 of the present embodiment shown in FIG. 1, the main oil pump 24 having a discharge flow rate of 7,000 L / min and a discharge pressure of 20 kg / cm ² is used to increase the booster turbine 28 to 7,000 L. / Min. Of lubricating oil should be discharged. In addition to this, 17,000 L / min of lubricating oil can be supplied to the bearing device by joining 7,000 L / min of lubricating oil from the bypass pipe 60 to the bearing oil supply mother pipe 40. In this embodiment, since the discharge flow rate of the main oil pump 24 can be kept low, the main oil pump 24 and the booster turbine 28 are not increased in size and the cost is not increased.

  According to the present invention, a sufficient amount of lubricating oil can be supplied without increasing the size of the lubricating oil supply facility even if the turbine power plant is increased in size. Further, the design flexibility of the lubricating oil supply facility can be expanded without increasing the cost of the lubricating oil supply facility.

DESCRIPTION OF SYMBOLS 10 Turbine power generation plant 12, 14 Turbine 12a, 14a Rotor shaft 16 Generator 16a, 32, 80 Rotating shaft 20 Lubricating oil supply equipment 22 Oil tank 24 Main oil pump 26 Booster
28 Booster Turbine 30 Booster Pump 34 Electric Pump 36 Motor 38 Discharge Pipe 40 Bearing Oil Supply Mother Pipe 42a-h Bearing Oil Supply Pipe 44 Oil Cooler 46 Filter 48, 52, 56 Oil Pipe 50, 54, 58 Check Valve 60 Bypass Pipe 62 Orifice 64, 72, 82 Casing 66, 74 Inlet 68, 76 Outlet 70, 78 Impeller o Lubricating oil

Claims (4)

An oil tank that stores lubricating oil, a main oil pump that is connected to and driven by the rotor shaft of the turbine, and a booster turbine and a booster pump that are immersed under the surface of the lubricating oil and share a rotating shaft. Equipment, and
The lubricating oil discharged from the main oil pump is supplied as hydraulic oil to the hydraulic actuator in the turbine plant, and the lubricating oil is supplied to the booster turbine to drive the booster turbine, and the lubricating oil after driving the booster turbine. In the turbine lubricating oil supply method in which the lubricating oil is returned to the main oil pump by a booster pump.
A part of the lubricating oil discharged from the booster pump is merged with the lubricating oil on the outlet side of the booster turbine via the bypass channel, and the flow rate of the lubricating oil supplied to the bearing device is increased.
The discharge pressure of the main oil pump is adjusted so that a part of the discharge lubricant oil passes through the bypass flow path while maintaining a lift in which the discharge lubricant oil of the booster pump can reach the main oil pump by the rotational torque of the booster. The turbine lubricating oil supply method is characterized in that it is set to a discharge pressure that can be supplied to the outlet side lubricating oil of the booster turbine.   The method of supplying a lubricating oil for a turbine according to claim 1, wherein the flow rate of the lubricating oil supplied to the bearing device is adjusted by adjusting the flow rate of the lubricating oil flowing through the bypass passage. . An oil tank that stores lubricating oil, a main oil pump that is connected to and driven by the rotor shaft of the turbine, and a booster turbine and a booster pump that are immersed under the surface of the lubricating oil and share a rotating shaft. An apparatus,
The lubricating oil discharged from the main oil pump is supplied as hydraulic oil to the hydraulic actuator in the turbine plant, and the lubricating oil is supplied to the booster turbine to drive the booster turbine, and the lubricating oil after driving the booster turbine. In the turbine lubricating oil supply device, the lubricating oil is returned to the main oil pump by a booster pump.
A bypass flow path connecting the outlet side flow path of the booster pump and the outlet side flow path of the booster turbine, and a lift at which the discharge lubricating oil of the booster pump can reach the main oil pump is maintained by the rotational torque of the booster. A main oil pump having a discharge pressure capable of supplying a part of the discharged lubricating oil to the outlet side lubricating oil of the booster turbine through the bypass flow path,
A lubricating oil supply device for a turbine, characterized in that a part of lubricating oil discharged from a booster pump is passed through the bypass flow path and merged with the outlet side lubricating oil of the booster turbine.   4. The lubricating oil supply device for a turbine according to claim 3, wherein a throttle mechanism for adjusting a flow rate of the lubricating oil is provided in the bypass passage.

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