JP2016125414A - Steam turbine installation, vessel, and method of controlling steam turbine installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a trouble due to the thermal contraction of an annular partitioning portion partitioning a high-pressure side turbine and a low-pressure side turbine.SOLUTION: A steam turbine installation includes: a high-pressure steam turbine 21 which rotates a rotor shaft 90 by main steam; a middle-pressure steam turbine 22 which rotates the rotor shaft 90 by reheat steam; an annular partitioning portion 23 which forms an inner peripheral surface opposite to an outer peripheral surface of the rotor shaft 90, partitions the high-pressure steam turbine 21 and the middle-pressure steam turbine 22, and forms a part of a reheat steam chamber 20d supplying steam discharged from the high-pressure steam turbine 21 to the middle-pressure steam turbine 22; a temperature sensor 23c which measures the temperature of the annular partitioning portion 23; and a control portion which controls so as to lower a number of rotations of the rotor shaft 90 when the temperature measured by the temperature sensor 23 is lower than predetermined temperature.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a steam turbine facility, a ship, and a method for controlling a steam turbine facility.

Conventionally, a ship using a steam turbine as a marine main engine is known (for example, refer to Patent Document 1). In such a ship, it is necessary to warm up the steam turbine even when it is anchored in order to be able to leave the shore immediately. By warming up the steam turbine, the step of warming up step by step is not required when leaving the shore, so that the shore can be taken off immediately.
Patent Document 1 discloses a technique for measuring the temperatures of the inner wall surface and the outer wall surface of a turbine casing to appropriately determine whether or not the steam turbine is in a warm air state.
In the steam turbine system disclosed in Patent Document 1, main steam supplied from a main boiler flows into a high-pressure turbine (high-pressure side turbine), and exhaust steam discharged from the high-pressure turbine is heated by a reheater to be reheated. It becomes steam and the reheated steam flows into the intermediate pressure turbine (low pressure side turbine).

JP 2012-180775 A

In the case of a steam turbine system as disclosed in Patent Document 1, the rotor shaft constituting the high-pressure turbine and the rotor shaft constituting the intermediate-pressure turbine are connected on the same axis. An annular partition portion that partitions the high pressure side and the medium pressure side is provided at a position where the rotor shaft is connected.
When a low temperature medium exists in the flow path to which the reheat steam is supplied from the reheater, and this medium flows into the intermediate pressure turbine, the annular partition is cooled. When the annular partition portion is cooled, the annular partition portion is thermally contracted to reduce the inner diameter of the inner peripheral surface, or is thermally contracted in the axial direction, and the clearance between the rotor shaft and the labyrinth portion is narrowed. When the degree of this heat shrinkage is large, the labyrinth portion arranged on the inner peripheral surface of the annular partitioning portion may come into contact with the rotor shaft to generate vibration and noise, or the rotor shaft may be damaged.

  In patent document 1, the temperature of the inner wall surface and outer wall surface of the compartment which accommodates a steam turbine is measured with a temperature sensor. However, the temperature of the inner wall surface and the outer wall surface of the turbine casing may not change even if a low-temperature medium that causes heat shrinkage of the annular partition flows into the intermediate pressure turbine. In this case, it cannot be detected by the temperature sensor that heat shrinkage has occurred in the annular partition. Therefore, there is a concern that the annular partition portion is cooled and thermally contracted, and the above-described problems occur.

  The present invention has been made in view of such circumstances, and includes a steam turbine facility that suppresses problems caused by thermal contraction of an annular partition that partitions between a high-pressure turbine and a low-pressure turbine, and includes the same. It aims at providing the control method of a ship and a steam turbine installation.

In order to achieve the above object, the present invention employs the following means.
The steam turbine equipment according to the first aspect of the present invention includes a rotor shaft, a high-pressure turbine that rotates the rotor shaft by high-pressure steam, and a low-pressure side that rotates the rotor shaft by low-pressure steam discharged from the high-pressure turbine. Forming an inner peripheral surface that opposes the outer peripheral surface of the rotor shaft between the turbine, the high-pressure turbine, and the low-pressure turbine, partitioning the high-pressure turbine and the low-pressure turbine, and An annular partition that forms part of a low-pressure steam chamber that supplies low-pressure steam discharged from the high-pressure turbine to the side turbine, a first temperature measurement unit that measures the temperature of the annular partition, and the first temperature And a control unit that controls to reduce the rotational speed of the rotor shaft when the temperature measured by the measurement unit falls below a predetermined temperature.

In the steam turbine equipment according to the first aspect of the present invention, the annular partition that partitions between the high-pressure turbine and the low-pressure turbine forms a part of the low-pressure steam chamber. Therefore, a low-temperature medium exists for some reason in the flow path to which the low-pressure steam is supplied, and when this medium flows into the low-pressure side turbine, the annular partition that forms a part of the low-pressure steam chamber is cooled.
According to the steam turbine equipment according to the first aspect of the present invention, the temperature of the annular partition measured by the first temperature measurement unit is a predetermined temperature (for example, the temperature of the inner peripheral surface of the passenger compartment housing the annular partition). When it falls below, the control unit controls to reduce the rotational speed of the rotor shaft. For this reason, even when a low-temperature medium inflow occurs and the annular partition portion undergoes thermal contraction, the inner peripheral surface of the annular partition portion contacts the rotor shaft, causing vibration or noise, or the rotor shaft Can be prevented from being damaged.

In the steam turbine equipment according to the first aspect of the present invention, the control unit rotates the rotor shaft when the temperature measured by the first temperature measurement unit continues below a predetermined temperature for a predetermined time. You may make it control so that a number may fall.
By doing in this way, the state where the temperature measured by the first temperature measurement unit is lower than the predetermined temperature continues for a predetermined time, and the possibility that the annular partition is thermally contracted is extremely high. The number of rotations can be reduced.

  The steam turbine equipment according to the second aspect of the present invention includes a rotor shaft, a high-pressure turbine that rotates the rotor shaft by high-pressure steam, and a low-pressure side that rotates the rotor shaft by low-pressure steam discharged from the high-pressure turbine. Forming an inner peripheral surface that opposes the outer peripheral surface of the rotor shaft between the turbine, the high-pressure turbine, and the low-pressure turbine, partitioning the high-pressure turbine and the low-pressure turbine, and An annular partition that forms part of a low-pressure steam chamber that supplies low-pressure steam discharged from the high-pressure turbine to the side turbine, a first temperature measurement unit that measures the temperature of the annular partition, and the low-pressure turbine A switching valve for switching whether or not to supply the warming steam having a temperature higher than a predetermined temperature to the flow path for supplying the low-pressure steam to the temperature, and the temperature measured by the first temperature measuring unit And a control unit for controlling the switching valve to supply the hot air steam when below the predetermined temperature to the flow path.

In the steam turbine equipment according to the second aspect of the present invention, the annular partition that partitions between the high-pressure turbine and the low-pressure turbine forms a part of the low-pressure steam chamber. Therefore, a low-temperature medium exists for some reason in the flow path to which the low-pressure steam is supplied, and when this medium flows into the low-pressure side turbine, the annular partition that forms a part of the low-pressure steam chamber is cooled.
According to the steam turbine equipment according to the second aspect of the present invention, the temperature of the annular partition measured by the first temperature measurement unit is a predetermined temperature (for example, the temperature of the inner peripheral surface of the passenger compartment housing the annular partition). When it falls below, the control unit controls the switching valve to supply the warm-up steam to the flow path for supplying the low-pressure steam. For this reason, it is possible to suppress warm contraction of the annular partition portion by mixing warm steam having a temperature higher than a predetermined temperature with a low temperature medium flowing into the low pressure steam chamber. Therefore, the trouble that the labyrinth part arranged on the inner peripheral surface of the annular partitioning part contacts the rotor shaft to generate vibration and noise, or the trouble that the rotor shaft is damaged can be suppressed.

In the steam turbine equipment according to the second aspect of the present invention, the control unit supplies the warm-up steam when a state in which the temperature measured by the first temperature measurement unit is lower than the predetermined temperature continues for a predetermined time. You may make it control the said switching valve to supply to the said flow path.
By doing so, when the temperature measured by the first temperature measurement unit is lower than the predetermined temperature continues for a predetermined time, and the possibility that the annular partition is thermally contracted is extremely high, the low-pressure steam is generated. The switching valve can be controlled to supply the warm-up steam to the supply flow path.

Any one of the steam turbine facilities described above is configured such that a temperature of an inner peripheral surface of a casing that houses the high-pressure turbine, the low-pressure turbine, and the annular partition, and a portion of the casing that houses the annular partition. A second temperature measuring unit for measuring, and the predetermined temperature may be a temperature measured by the second temperature measuring unit or a temperature obtained by subtracting a threshold temperature from the temperature measured by the second temperature measuring unit. .
By doing in this way, the temperature of the annular partition part which a 1st temperature measurement part measures is lower than the temperature of the inner peripheral surface of a vehicle room which a 2nd temperature measurement part measures, or the temperature which subtracted the threshold temperature from it, It is possible to appropriately detect a state in which the possibility that the annular partition portion is thermally contracted is extremely high. Accordingly, it is possible to suppress the problem that the labyrinth part arranged on the inner peripheral surface of the annular partitioning part contacts the rotor shaft to generate vibration and noise, or the problem that the rotor shaft is damaged.

In the steam turbine equipment configured as described above, the first temperature measurement unit is a space that is sandwiched between the outer peripheral surface of the annular partitioning portion and the inner peripheral surface of the casing and is not in communication with the low-pressure steam chamber. You may make it measure temperature.
By doing in this way, the temperature of an annular partition part can be measured, without making a 1st temperature measurement part contact the annular partition part which deform | transforms by heat contraction directly. Therefore, the malfunction that a 1st temperature measurement part is damaged by the thermal contraction of an annular partition part can be suppressed. Moreover, the temperature of the annular partition can be measured so that the temperature change due to the medium flowing into the low-pressure steam chamber is not directly received. Therefore, when the temperature of the low-pressure steam flowing into the low-pressure steam chamber changes within a range that does not cause heat shrinkage of the annular partition, the operation state of the steam turbine equipment (for example, the rotational speed of the turbine) should be maintained without change. Can do.

The ship concerning one mode of the present invention is provided with the steam turbine equipment in any one of the above, and the propulsion device which generates propulsion power with the rotation power which the steam turbine equipment generates.
By doing in this way, the ship provided with the steam turbine equipment which suppressed the malfunction by the cyclic | annular partition part which partitions off between a high pressure side turbine and a low pressure side turbine thermally contracting can be provided.

  The steam turbine equipment control method according to the first aspect of the present invention includes a rotor shaft, a high-pressure turbine that rotates the rotor shaft by high-pressure steam, and the rotor shaft that rotates by low-pressure steam discharged from the high-pressure turbine. And forming an inner peripheral surface that opposes the outer peripheral surface of the rotor shaft between the high-pressure turbine and the low-pressure turbine, and partitioning the high-pressure turbine from the low-pressure turbine. A method for controlling steam turbine equipment, comprising: an annular partition that forms part of a low-pressure steam chamber that supplies the low-pressure steam discharged from the high-pressure turbine to the low-pressure turbine, the temperature of the annular partition A first temperature measuring step for measuring the rotation of the rotor shaft when the temperature measured by the first temperature measuring step is lower than a predetermined temperature. And a control step of controlling.

  According to the control method of the steam turbine equipment according to the first aspect of the present invention, the temperature of the annular partition measured by the first temperature measurement step is a predetermined temperature (for example, the inner peripheral surface of the passenger compartment that houses the annular partition). When the temperature is lower than the (temperature), the control process controls to reduce the rotational speed of the rotor shaft. Therefore, even when the annular partition is thermally contracted due to the inflow of a low-temperature medium, the labyrinth disposed on the inner peripheral surface of the annular partition contacts the rotor shaft, causing a problem of vibration and noise, or A problem that the rotor shaft is damaged can be suppressed.

  The steam turbine equipment control method according to the second aspect of the present invention includes a rotor shaft, a high-pressure turbine that rotates the rotor shaft by high-pressure steam, and the rotor shaft that rotates by low-pressure steam discharged from the high-pressure turbine. And forming an inner peripheral surface that opposes the outer peripheral surface of the rotor shaft between the high-pressure turbine and the low-pressure turbine, and partitioning the high-pressure turbine from the low-pressure turbine. An annular partition that forms part of a low-pressure steam chamber that supplies low-pressure steam discharged from the high-pressure turbine to the low-pressure turbine, and a flow path that supplies the low-pressure steam to the low-pressure turbine from a predetermined temperature. A steam turbine equipment control method comprising a switching valve for switching whether or not to supply high-temperature warm-up steam, wherein the temperature of the annular partition is measured Comprising a first temperature measuring step, and a control step of temperature to which the first temperature measuring step of measuring to control the switching valve to supply the hot air steam when below the predetermined temperature to the flow path.

  According to the control method for steam turbine equipment according to the second aspect of the present invention, the temperature of the annular partition measured by the first temperature measurement step is a predetermined temperature (for example, the inner peripheral surface of the passenger compartment that houses the annular partition). When the temperature is lower, the control step controls the switching valve so as to supply the warm-up steam to the flow path for supplying the low-pressure steam. For this reason, it is possible to suppress warm contraction of the annular partition portion by mixing warm steam having a temperature higher than a predetermined temperature with a low temperature medium flowing into the low pressure steam chamber. Therefore, the trouble that the labyrinth part arranged on the inner peripheral surface of the annular partitioning part contacts the rotor shaft to generate vibration and noise, or the trouble that the rotor shaft is damaged can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the steam turbine equipment which suppressed the malfunction by the annular partition part which partitions off between a high pressure side turbine and a low pressure side turbine thermally contracted, the ship provided with the same, and the control method of a steam turbine equipment are provided. can do.

It is a schematic block diagram which shows the steam turbine equipment of 1st Embodiment. It is a longitudinal cross-sectional view which shows the high intermediate pressure steam turbine shown in FIG. It is AA arrow sectional drawing of the high intermediate pressure steam turbine shown in FIG. FIG. 3 is a cross-sectional view of the passenger compartment shown in FIG. It is a flowchart explaining the operation | movement which the steam turbine equipment of 1st Embodiment performs. It is a figure which shows the change by the elapsed time of the temperature of each part about the high intermediate pressure steam turbine of 1st Embodiment, and the change by the elapsed time of the rotation speed of a rotor shaft. It is a schematic block diagram which shows the steam turbine installation of 2nd Embodiment. It is a flowchart explaining the operation | movement which the steam turbine equipment of 2nd Embodiment performs.

[First Embodiment]
Hereinafter, steam turbine equipment according to a first embodiment of the present invention will be described with reference to the drawings.
The steam turbine equipment 100 according to the present embodiment is used for propulsion of a ship such as an LNG ship. The marine vessel includes a steam turbine facility 100, a speed reducer (not shown) that reduces and transmits the rotational power generated by the steam turbine facility 100, and a propulsion device that generates a propulsive force by the rotational power transmitted through the speed reducer. A propeller (not shown).

As shown in FIGS. 1 and 2, the steam turbine equipment 100 of the present embodiment includes a main boiler 10, a high intermediate pressure steam turbine 20, a reheater 30, a low pressure steam turbine 40, a reverse turbine 50, A condenser 60, a condensate pump 70, a control unit 80, and a rotor shaft 90 are provided.
The main boiler 10 burns fuel and an oxidant supplied from a burner (not shown) in a furnace, and generates high-temperature (for example, about 560 ° C.) main steam (high-pressure steam) by heat generated by the combustion. Device. The main steam generated by the main boiler 10 is supplied to the main steam inlet 20 a (see FIG. 2) of the high intermediate pressure steam turbine 20 through the main steam pipe 1.

As shown in FIG. 1, a forward switching valve 1 a and a forward steering valve 1 b are provided on the flow path of the main steam pipe 1.
The forward switching valve 1a is a valve that is opened when the main steam is supplied from the main boiler 10 to the high intermediate pressure steam turbine 20 in order to obtain thrust for moving the ship forward. The forward switching valve 1a is switched to a closed state to stop the ship.
The forward control valve 1b is a valve whose opening degree is switched in order to control the flow rate of the main steam supplied from the main boiler 10 to the high intermediate pressure steam turbine 20 when the forward switching valve 1a is in the open state. The forward control valve 1b is switched to a closed state when the ship is moved backward. The opening degree of the forward control valve 1b is controlled by the control unit 80.

As shown in FIG. 2, the high intermediate pressure steam turbine 20 includes a high pressure steam turbine 21 (high pressure side steam turbine), an intermediate pressure steam turbine 22 (low pressure side steam turbine), an annular partition 23, and a thermal shield ring 24. And a passenger compartment 25.
The high-pressure steam turbine 21 is a rotating member that is rotated by main steam supplied from the main boiler 10 via the main steam pipe 1. As shown in FIG. 2, the high-pressure steam turbine 21 is obtained by attaching a plurality of stages of moving blades disposed along the axis X direction to a rotor shaft 90 extending in the axis X direction.

  The intermediate pressure steam turbine 22 is a rotating member that is rotated by reheat steam (low pressure steam) supplied from the reheater 30 via the reheat steam pipe 3. As shown in FIG. 2, the intermediate-pressure steam turbine 22 has a rotor shaft 90 extending in the axis X direction and a plurality of stages of moving blades arranged along the axis X direction.

  The reheater 30 heats the exhaust steam discharged from the high pressure steam turbine 21 through the steam pipe 2 to generate reheat steam, and supplies the intermediate pressure steam turbine 22 through the reheat steam pipe 3. There is an exchanger. The reheater 30 heats the exhaust steam with heat generated in the main boiler 10 to generate high-temperature (for example, 560 ° C.) reheat steam. A reheat steam stop valve 3 a is provided on the flow path of the reheat steam pipe 3.

  The low-pressure steam turbine 40 is a rotating member that is rotated by exhaust steam supplied from the intermediate-pressure steam turbine 22 via the steam pipe 4. The exhaust steam discharged from the low-pressure steam turbine 40 is supplied to the condenser 60 through the condensate pipe 5.

  The reverse turbine 50 is a rotating member that is rotated by main steam supplied through the reverse main steam pipe 6 branched from the middle of the main steam pipe 1. The reverse turbine 50 is used when the ship reverses. The rotor shaft (not shown) included in the reverse turbine and the rotor shaft (not shown) included in the low-pressure steam turbine 40 are an integral rotating shaft disposed on the same axis (not shown). This rotating shaft is a separate rotating shaft independent of the rotor shaft 90. Each of these pair of rotating shafts is connected to a speed reducer. Rotational power output from each of the pair of rotating shafts is transmitted to a propeller (not shown) via a speed reducer.

On the flow path of the reverse main steam pipe 6, a reverse intermediate valve 6a and a reverse control valve 6b are provided.
The reverse intermediate valve 6a is a valve that is opened when main steam is supplied from the main boiler 10 to the reverse turbine 50 in order to obtain thrust for moving the ship backward. When the ship navigates the harbor or when the ship is stopped, the reverse intermediate valve 6a is switched to the open state. On the other hand, when the ship sails in the open ocean, the reverse intermediate valve 6a is switched to the closed state.
The reverse operation valve 6b is a valve whose opening degree is switched in order to control the flow rate of the main steam supplied from the main boiler 10 to the reverse turbine 50 when the reverse intermediate valve 6a is open. The opening degree of the reverse operation valve 6 b is controlled by the control unit 80.

The condenser 60 is a device that condenses exhaust steam supplied from the low-pressure steam turbine 40 via the condensate pipe 5 to generate condensate.
The condensate pump 70 is a device that supplies the condensate condensed in the condenser 60 to the main boiler 10 via the water supply pipe 8.

  The control unit 80 is a device that controls each part of the steam turbine equipment 100 of the present embodiment. The controller 80 controls the output of the main boiler 10 by controlling the amount of fuel and oxidant supplied to the burner (not shown) of the main boiler 10. Further, the control unit 80 adjusts the opening of various valves such as the opening of the forward control valve 1b and the opening of the reverse control valve 6b. In this way, the control unit 80 controls the rotational speed of the rotor shaft of the high and medium pressure steam turbine 20 and the rotational speed of the rotor shaft of the low pressure steam turbine 40.

Next, the structure of the high and medium pressure steam turbine 20 will be described in more detail with reference to FIGS.
As shown in FIG. 2, the high intermediate pressure steam turbine 20 includes an annular partition 23, a thermal shield ring 24, and a vehicle compartment 25.
The high-pressure steam turbine 21, the intermediate-pressure steam turbine 22, the annular partition 23, and the thermal shield ring 24 are accommodated in the passenger compartment 25 around the axis X. The outer peripheral surfaces of the annular partitioning portion 23 and the thermal shield ring 24 are supported in a state of being in contact with the inner peripheral surface of the passenger compartment 25.
As shown in FIG. 3, the passenger compartment 25 has a structure in which an upper passenger compartment 25a and a lower passenger compartment 25b are fastened with fastening bolts.

  The annular partition 23 is a member that partitions between the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 that are accommodated in the passenger compartment 25. The annular partition 23 has an inner peripheral surface that faces the outer peripheral surface of the rotor shaft 90. As shown in FIG. 2, the inner peripheral surface is provided with a plurality of seal rings 23 b for forming a seal region for steam with the outer peripheral surface of the rotor shaft 90.

  The main steam is guided from the main steam inlet 20a to the nozzle chamber 20b formed inside the annular partition 23. The main steam guided to the nozzle chamber 20 b is guided to the first stage stationary blade of the high-pressure steam turbine 21. The main steam that has worked to change the high-temperature and high-pressure energy of the main steam into rotational power in the high-pressure steam turbine 21 becomes exhaust steam and is led to the reheater 30 from the main steam outlet 20c.

  The reheat steam chamber 20 d formed in the high intermediate pressure steam turbine 20 is a space for supplying the reheat steam guided from the reheater 30 to the reheat steam inlet 20 e to the first stage stationary blades of the intermediate pressure steam turbine 22. . The reheat steam chamber 20d is an annular space extending around the axis X. The reheat steam chamber 20 d is partly formed by the outer peripheral surface of the annular partition 23 and the other part is formed by the inner peripheral surface of the thermal shield ring 24.

  The high intermediate pressure steam turbine 20 has a space S <b> 1 (a space communicating with the rear of the first stage moving blade of the high-pressure steam turbine 21) sandwiched between the outer peripheral surface of the annular partition 23 and the inner peripheral surface of the casing 25. The space S1 does not communicate with the nozzle chamber 20b and the reheat steam chamber 20d. A seal region formed by a plurality of seal rings 23b exists between the space S1 communicating with the rear of the first stage rotor blade of the high-pressure steam turbine 21 and the reheat steam chamber 20d. A seal region is also provided between the space S1 and the first stage first stage nozzle outlet in the high-pressure steam turbine 21 after the nozzle chamber 20b.

  Thus, the space S1 is a space that is not directly subjected to the temperature change of the reheat steam flowing into the reheat steam chamber 20d. Similarly, the space S1 is a space that is not directly subjected to the temperature change of the main steam flowing into the nozzle chamber 20b. Moreover, since a part of outer peripheral surface of the annular partition part 23 forms the reheat steam chamber 20d, the temperature of the annular partition part 23 varies depending on the temperature of the medium flowing into the reheat steam chamber 20d. Therefore, when the temperature of the annular partition 23 changes, the temperature of the space S1 also changes under the influence.

  In the present embodiment, in order to estimate the temperature of the annular partition 23 that changes depending on the temperature of the medium flowing into the reheat steam chamber 20d, the temperature sensor 23c (first sensor) that measures the temperature of the space S1 in the high and medium pressure steam turbine 20 is used. A temperature measuring unit) was provided. The temperature sensor 23c does not directly measure the temperature of the annular partition 23, but indirectly measures the temperature change of the annular partition 23 by measuring the temperature of the space S1. The temperature measured by the temperature sensor 23c is transmitted to the control unit 80 via a signal line (not shown).

  As shown in FIG. 3, the tip of the temperature sensor 23 c is disposed at a position where it does not contact the annular partition 23. A space is provided between the tip of the temperature sensor 23c and the annular partition 23 so that the annular partition 23 does not come into contact with the annular partition 23 even if thermal deformation occurs. A thermocouple (not shown) for measuring the temperature is provided at the tip of the temperature sensor 23c. Since an appropriate interval is provided between the tip of the temperature sensor 23c and the annular partition 23, the position at which the temperature sensor 23c is fixed changes due to thermal deformation of the annular partition 23, and the temperature due to the thermocouple. Measurement is not impossible.

As shown in FIG. 3, a drain pipe (not shown) that guides drain water staying in the space S <b> 1 to the condenser 60 is provided in the casing 25 that forms a part of the space S <b> 1.
As shown in FIG. 2, the thermal shield ring 24 is a cylindrical member that constitutes a part of the reheat steam chamber 20d. The thermal shield ring 24 prevents the passenger compartment 25 from coming into direct contact with high-temperature (for example, 560 ° C.) reheat steam. Since the passenger compartment 25 is not heated by the high-temperature reheat steam, the life of the passenger compartment 25 can be extended and the creep strength in the high temperature region can be ensured.

  A space S <b> 2 is formed between the outer peripheral surface of the thermal shield ring 24 and the inner peripheral surface of the passenger compartment 25 facing it. A part of the exhaust steam discharged from the high-pressure steam turbine 21 is extracted and guided into the space S2. The exhaust steam discharged from the high-pressure steam turbine 21 is at a lower temperature (for example, 370 ° C.) than the reheat steam. Therefore, the passenger compartment 25 is protected from the heat of the reheated steam by the exhaust steam discharged from the high-pressure steam turbine 21.

Next, a temperature sensor provided in the high and medium pressure steam turbine 20 will be described with reference to FIGS. 3 and 4.
The high intermediate pressure steam turbine 20 of the present embodiment includes a temperature sensor 23c, a temperature sensor 26a, a temperature sensor 26b, a temperature sensor 27a, a temperature sensor 27b, a temperature sensor 28a, a temperature sensor 28b, and a temperature sensor 29a. And a temperature sensor 29b.

The temperature sensors 26a, 27a, 28a, and 29a are sensors that measure the temperature in the vicinity of the inner peripheral surface of the passenger compartment 25, respectively. The temperatures measured by the temperature sensors 26a, 27a, 28a, 29a are transmitted to the control unit 80 via signal lines (not shown).
As shown in FIG. 4, the temperature sensors 26 a, 27 a, 28 a, and 29 a are embedded in the wall surface of the passenger compartment 25 so that the tips thereof are located in the vicinity of the inner peripheral surface of the passenger compartment 25. The temperature measuring elements of the temperature sensors 26a, 27a, 28a, and 29a are arranged at the distal end portion. Therefore, the temperatures detected by the temperature sensors 26 a, 27 a, 28 a, and 29 a are close to the inner peripheral surface of the passenger compartment 25.

The temperature sensors 26b, 27b, 28b, and 29b are sensors that measure the temperature in the vicinity of the outer peripheral surface of the passenger compartment 25, respectively. The temperatures measured by the temperature sensors 26b, 27b, 28b, and 29b are transmitted to the control unit 80 via signal lines (not shown).
As shown in FIG. 4, the temperature sensors 26 b, 27 b, 28 b, and 29 b are arranged so that their tips are located in the vicinity of the outer peripheral surface of the passenger compartment 25. The temperature measuring elements of the temperature sensors 26b, 27b, 28b, and 29b are arranged at the distal end portion. Therefore, the temperature detected by the temperature sensors 26 b, 27 b, 28 b, and 29 b is close to the outer peripheral surface of the passenger compartment 25.

As shown in FIG. 4, the positions on the axis X where the temperature sensors 26a, 27a, 28a, 29a are arranged are different from each other. The positions on the axis X where the temperature sensors 26b, 27b, 28b, 29b are arranged are different positions.
A position on the axis X where the temperature sensor 26a is arranged and a position on the axis X where the temperature sensor 23c is arranged coincide with each other at the position P.
The position on the axis X where the temperature sensor 26a is arranged and the position on the axis X where the temperature sensor 23c is arranged preferably coincide with each other at the position P. It suffices if they are almost identical to the extent that there is no error.

  Next, the operation | movement which the steam turbine equipment 100 of this embodiment performs is demonstrated using the flowchart shown in FIG. Each process in the flowchart shown in FIG. 5 is executed when the control unit 80 reads a control program from a storage unit (not shown).

  In step S501, the control unit 80 determines whether or not the activation of the steam turbine equipment 100 is completed. If the activation is completed, the process proceeds to step S502. When the activation of the steam turbine facility 100 is not completed, the control unit 80 ends the process of this flowchart once and starts the process of this flowchart again.

  In step S502, the control unit 80 measures the temperature Tn of the space S1 using the temperature sensor 23c. The temperature sensor 23c has temperature measuring elements arranged in the space S1 shown in FIGS. 2 and 3, and the space S1 is in contact with the outer peripheral surface of the annular partition 23. The space S1 is a space that does not directly communicate with the reheat steam chamber 20d and the nozzle chamber 20b. Therefore, although the temperature Tn measured by the temperature sensor 23c does not exactly match the temperature of the annular partition 23, it can be handled as substantially the same temperature.

In step S503, the control unit 80 measures the temperature Tci of the inner peripheral surface of the portion of the passenger compartment 25 that houses the annular partition 23 using the temperature sensor 26a. As shown in FIG. 3, the inner peripheral surface of the passenger compartment 25 where the temperature sensor 26a detects the temperature Tci is a position in contact with the space S1. Further, the positions where the temperature sensor 23c and the temperature sensor 26a are arranged coincide with each other at a position P on the axis X. Therefore, the temperature change of the annular partition 23 and the temperature of the passenger compartment 25 at the same axial position P can be detected.
Usually, the temperature of the annular partition 23 that directly contacts the high-temperature steam is the highest, the next highest temperature is the temperature Tn of the space S1 sandwiched between the annular partition 23 and the vehicle compartment 25, and the outer periphery is in contact with the outside air. The temperature Tci of the passenger compartment 25 is the lowest.

  In step S504, the control unit 80 determines whether or not the temperature Tn of the space S1 affected by the temperature change of the annular partition 23 is lower than the temperature obtained by subtracting the threshold temperature α from the temperature Tci of the inner peripheral surface of the passenger compartment 25. . If it is determined that Tn <Tci−α is satisfied, the control unit 80 proceeds to step S505, and otherwise proceeds to step S506.

When the control unit 80 determines YES in step S504, the temperature Tn of the space S1 affected by the temperature change of the annular partition 23 is lower than the temperature Tci of the inner peripheral surface of the passenger compartment 25, and the temperature difference is a threshold value. The temperature is higher than α. The interior of the passenger compartment 25 exhibits a temperature gradient in which the temperature gradually decreases from the inside toward the outside in a normal state. Therefore, in a normal state, the temperature Tn of the space S1 that is affected by the temperature change of the annular partition 23 becomes higher than the temperature Tci of the inner peripheral surface of the passenger compartment 25.
Therefore, when the control unit 80 determines YES in step S504, the low temperature medium flows into the reheat steam chamber 20d for some reason, and the annular partition 23 is cooled by the low temperature medium. I can judge.

In step S504, the threshold temperature α can be set to any value greater than or equal to 0. For example, it is desirable to set any value between 10 ° C. and 20 ° C.
In addition, when the control unit 80 determines in step S504 that Tn <Tci−α is satisfied, the process proceeds to step S505. However, other modes may be used. For example, the control unit 80 sets the duration β (for example, an arbitrary time of 5 minutes or more), and when the state satisfying Tn <Tci−α continues for the duration β, the process proceeds to step S505. You may make it advance.

  In this case, the processes in steps S502, S503, and S504 are continuously executed over the duration β, and the process proceeds to step S505 when the determination in step S504 remains YES over the duration β. By providing the duration β in this way, even if the condition of Tn <Tci−α is satisfied due to some unexpected factor, the rotational speeds of the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 are immediately reduced. There can be no.

  In step S505, the control unit 80 controls the output / rotation speed of the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 to be reduced by reducing the opening degree of the forward control valve 1b. The reason why the output and rotational speed of the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 are reduced is to suppress the occurrence of a temperature difference between the annular partition 23 and the rotor shaft 90 by reducing the flow rate of the main steam. It is. By suppressing the occurrence of these temperature differences, the problem that the seal ring 23b of the annular partition 23 that thermally contracts due to the low temperature medium flowing into the reheated steam chamber 20d contacts the outer peripheral surface of the rotor shaft 90 is suppressed. be able to. The control unit 80 proceeds to step S507 after executing the process of step S505.

  In step S506, the control unit 80 performs normal operation because the temperature Tn of the space S1 that is affected by the temperature change of the annular partition 23 is higher than the temperature Tci of the inner peripheral surface of the passenger compartment 25. . The normal operation is an operation for appropriately controlling the opening degree of the forward control valve 1b so that the steam turbine equipment 100 is operated at a predetermined target load. After executing the normal operation, the control unit 80 advances the process to step S502 again.

  In step S507, the control unit 80 measures the temperature Tn of the space S1 affected by the temperature change of the annular partition 23 using the temperature sensor 23c. Moreover, the control part 80 measures temperature Tci of the internal peripheral surface of the part which accommodates the annular partition part 23 among the compartment 25 using the temperature sensor 26a by step S508.

  In step S509, the control unit 80 determines whether or not the temperature Tn of the space S1 affected by the temperature change of the annular partition 23 is higher than the temperature obtained by subtracting the threshold temperature α from the temperature Tci of the inner peripheral surface of the passenger compartment 25. . If it is determined that Tn> Tci−α is satisfied, the control unit 80 advances the process to step S510, and if not, executes the process of step S505 again.

  When the control unit 80 determines that Tn> Tci−α is satisfied in step S509 described above, the process proceeds to step S510. However, other modes may be used. For example, the control unit 80 sets a duration γ (for example, an arbitrary time of 5 minutes or more), and when the state satisfying Tn <Tci−α continues for the duration γ, the process proceeds to step S510. You may make it advance.

  In this case, the processes in steps S507, S508, and S509 are continuously executed over the duration γ, and the process proceeds to step S510 if the determination in step S509 remains YES over the duration γ. By providing the duration time γ in this way, even if the condition of Tn> Tci-α is satisfied due to some unexpected factor, the output and the rotational speed of the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 are immediately increased. It can be made not to let you. Note that the above-described duration β and duration γ may be set to the same value.

  In step S <b> 510, the control unit 80 controls to increase the output / rotation speed of the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 by increasing the opening degree of the forward control valve 1 b. The reason why the output and the rotational speed of the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 are increased is that the thermal contraction of the annular partition 23 caused by the flow of the low-temperature medium into the reheat steam chamber 20d is eliminated. The controller 80 proceeds to step S502 after executing the process of step S510.

Next, with respect to the steam turbine equipment 100 of the present embodiment, the change due to the elapsed time of the temperature of each part and the change due to the elapsed time of the rotation speed of the rotor shaft will be described with reference to FIG.
As shown in FIG. 6, the temperature Tr of the reheat steam supplied to the reheat steam chamber 20d is about 550 ° C. when the elapsed time is 0 minutes. On the other hand, the temperature Tr decreases after the elapsed time of 20 minutes elapses, and is about 340 ° C. during the period of time from 150 minutes to 200 minutes. This indicates that a low temperature medium flows into the reheat steam chamber 20d for some reason.

  As shown in FIG. 6, the temperature Tn of the space S1 affected by the temperature change of the annular partition 23 is about 480 ° C. when the elapsed time is 0 minutes. Further, the temperature Tci of the inner peripheral surface of the passenger compartment 25 is about 450 ° C. when the elapsed time is 0 minutes. Thus, when the elapsed time is 0 minutes, the temperature Tn of the space S1 that is affected by the temperature change of the annular partition 23 becomes a temperature state during normal operation that is higher than the temperature Tci of the inner peripheral surface of the passenger compartment 25. ing.

On the other hand, the temperature Tn and the temperature Tci decrease after the elapsed time of 20 minutes, and the temperature Tn falls below the temperature Tci when the elapsed time is about 80 minutes. The gradient of the temperature drop of the temperature Tn is large because the annular partition 23 that forms a part of the reheat steam chamber 20d is more strongly affected by the temperature of the low-temperature medium flowing into the reheat steam chamber 20d. It is.
The difference between the temperature Tn and the temperature Tci gradually increases after the elapsed time exceeds about 80 minutes, and the difference between the temperature Tn and the temperature Tci exceeds 20 ° C. when the elapsed time reaches about 130 minutes.

  Assume that the threshold temperature α is set to 20 ° C. in the process of step S504 in FIG. 5 described above. In this case, when the elapsed time is about 130 minutes and the difference between the temperature Tn and the temperature Tci exceeds 20 ° C., the control unit 80 determines YES in step S504 and executes the process of step S505. Thereby, the rotation speed R of the rotor shaft shown in FIG. 6 decreases. Here, the rotational speed R of the rotor shaft is the rotational speed of the rotor shaft 90.

In the example shown in FIG. 6, the temperature Tr increases after the elapsed time of 200 minutes has elapsed, and becomes about 550 ° C. again when the elapsed time reaches 340 minutes. This indicates that the influence of the low-temperature medium flowing into the reheat steam chamber 20d for some reason has been eliminated.
As the temperature Tr increases, the temperature Tn and the temperature Tci increase after an elapsed time of 200 minutes, and the temperature Tn exceeds the temperature Tci when the elapsed time is about 270 minutes.

When the elapsed time is about 260 minutes and the difference between the temperature Tn and the temperature Tci falls below 20 ° C., the control unit 80 determines YES in step S509 and executes the process of step S510. Thereby, the rotation speed R of the rotor shaft shown in FIG. 6 increases.
As described above, the steam turbine equipment 100 according to the present embodiment includes a labyrinth portion formed by the seal ring 23b and the labyrinth portion formed by the seal ring 23b when the low temperature medium flows into the reheat steam chamber 20d and the annular partition portion 23 is thermally contracted. Before the contact abnormality occurs, the rotation speed R of the rotor shaft 90 is reduced. Thereby, the malfunction that the seal ring 23b attached to the inner peripheral surface of the heat-shrinkable annular partition 23 contacts the rotor shaft 90 can be suppressed, or the magnitude of vibration and noise caused by the contact can be suppressed.

The operation and effect of the steam turbine equipment 100 of the present embodiment described above will be described.
In the steam turbine equipment 100 of the present embodiment, the annular partition 23 that partitions the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 forms a part of the reheat steam chamber 20d. Therefore, a low temperature medium exists for some reason in the reheat steam pipe 3 to which the reheat steam is supplied from the reheater 30, and when this medium flows into the intermediate pressure steam turbine 22, a part of the reheat steam chamber 20d is formed. The annular partition 23 to be formed is cooled.

  According to the steam turbine equipment 100 of the present embodiment, when the temperature Tn of the space S1 that is affected by the temperature change of the annular partition 23 measured by the temperature sensor 23c is lower than Tci-α, the controller 80 controls the high-pressure steam turbine 21. In addition, control is performed so as to reduce the output and the rotational speed of the intermediate pressure steam turbine 22. Therefore, even when the annular partition 23 is unexpectedly thermally contracted by the inflow of a low-temperature medium, the inner peripheral surface of the annular partition 23 contacts the rotor shaft 90 to generate vibration or noise, or the rotor shaft Can be prevented in advance.

In the steam turbine equipment 100 of the present embodiment, the control unit 80, when the state where the temperature Tn of the space S1 affected by the temperature change measured by the temperature sensor 23c is lower than Tci-α continues for the duration β. You may make it control so that the output and rotation speed of the high pressure steam turbine 21 and the intermediate pressure steam turbine 22 may be reduced.
By doing in this way, when the temperature Tn measured by the temperature sensor 23c is lower than Tci-α for the duration β, there is a high possibility that the annular partition 23 is thermally contracted. The output and rotation speed of the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 can be reduced.

In the steam turbine equipment 100 of the present embodiment, the temperature sensor 23c is a space S1 sandwiched between the outer peripheral surface of the annular partition 23 and the inner peripheral surface of the vehicle compartment 25 and is not in communication with the reheat steam chamber 20d. The temperature of S1 is measured.
By doing in this way, the temperature change of the annular partition part 23 can be measured, without making the temperature sensor 23c directly contact the annular partition part 23 which deform | transforms by heat shrink. Therefore, the malfunction that the temperature sensor 23c is damaged by the thermal contraction of the annular partition 23 can be suppressed. In addition, the temperature Tn of the space S1 that is affected by the temperature change of the annular partition 23 can be measured so that the temperature change due to the medium flowing into the reheat steam chamber 20d is not directly received. Therefore, when the temperature of the reheat steam flowing into the reheat steam chamber 20d changes within a range in which the annular partition 23 is not thermally contracted, the operating state of the steam turbine equipment 100 (for example, the rotational speed of the turbine) is changed. Can be maintained without.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The second embodiment is a modification of the first embodiment, and is the same as the first embodiment unless otherwise described below.
The steam turbine equipment 100 according to the first embodiment reduces the output and rotational speed of the high-pressure steam turbine 21 and the intermediate-pressure steam turbine 22 when the temperature Tn measured by the temperature sensor 23c satisfies Tn <Tci−α. It was.
On the other hand, the steam turbine equipment 100 ′ of the second embodiment supplies heating steam to the reheat steam pipe 3 when the temperature Tn measured by the temperature sensor 23 c is Tn <Tci−α.

  As shown in FIG. 7, the steam turbine equipment 100 ′ of the present embodiment includes a reheat steam warm pipe valve 1 c. The reheat steam warm pipe valve 1c is a valve that switches whether steam is supplied to the reheat steam pipe 3 from a low-pressure high-temperature steam source (not shown) for warm pipe use. The temperature of the steam supplied to the reheat steam pipe 3 via the reheat steam warm pipe valve 1c is, for example, 350 ° C. or more and 500 ° C. or less.

Next, the operation | movement which steam turbine equipment 100 'of this embodiment performs is demonstrated using the flowchart shown in FIG. Each process in the flowchart shown in FIG. 8 is executed by the control unit 80 reading a control program from a storage unit (not shown).
Note that the processing of steps S801 to S804 and S806 to S809 shown in FIG. 8 is the same as the processing of steps S501 to S504 and S506 to S509 shown in FIG. . Below, the process of step S805 and step S810 shown in FIG. 8 is demonstrated.

  In step S805, the control unit 80 transmits a control signal to the reheat steam warm pipe valve 1c, and transmits an open signal to the reheat steam warm pipe valve 1c. The reason why the reheat steam warm pipe valve 1c is in the open state is that the seal ring 23b of the annular partition 23 that is thermally contracted by the inflow of a low-temperature medium into the reheat steam chamber 20d contacts the outer peripheral surface of the rotor shaft 90. It is for suppressing. By opening the reheat steam warm pipe valve 1c, steam flows into the reheat steam pipe 3 from a low-pressure high-temperature steam source (not shown). As a result, high-temperature steam flows into the reheat steam chamber 20d through the reheat steam pipe 3, and the annular partition 23 is prevented from being thermally contracted. The control unit 80 advances the process to step S807 after executing the process of step S805.

  In step S810, the control unit 80 transmits a control signal to the reheat steam warm pipe valve 1c to close the reheat steam warm pipe valve 1c. The reason why the reheat steam warm pipe valve 1c is closed is that the thermal contraction of the annular partition 23 due to the flow of the low temperature medium into the reheat steam chamber 20d is eliminated. After executing the process of step S810, the control unit 80 advances the process to step S802.

According to the steam turbine equipment 100 ′ of the present embodiment described above, when the temperature Tn of the space S1 affected by the temperature change of the annular partition 23 measured by the temperature sensor 23c is lower than Tci−α, the controller 80 A control signal is transmitted to the reheat steam warm pipe valve 1c, and the reheat steam warm pipe valve 1c is opened.
Therefore, before the annular partition 23 is thermally contracted by the inflow of a low-temperature medium and a contact abnormality between the labyrinth formed by the seal ring 23b and the rotor shaft 90 occurs, the inner peripheral surface of the annular partition 23 becomes the rotor shaft. It is possible to suppress the occurrence of vibrations and noises coming into contact with 90, or damage to the rotor shaft 90.

In the steam turbine equipment 100 of the present embodiment, the control unit 80 causes the reheat steam warm pipe to operate when the state where the temperature Tn measured by the temperature sensor 23c is lower than Tci-α continues for the duration β. A control signal may be transmitted to the valve 1c and an open signal may be transmitted to the reheat steam warm pipe valve 1c.
By doing so, the state where the temperature Tn measured by the temperature sensor 23c is lower than Tci-α continues for the duration β, and the possibility that the annular partition 23 is thermally contracted is extremely high. The hot steam warm pipe valve 1c can be opened.

[Other Embodiments]
In the above description, the temperature sensor 23c measures the temperature of the space S1 sandwiched between the outer peripheral surface of the annular partition 23 and the vehicle compartment 25 as the temperature of the annular partition 23, but in another aspect. There may be.
For example, the temperature measuring element of the temperature sensor 23c may be brought into contact with the outer peripheral surface of the annular partition 23 and the temperature of the outer peripheral surface of the annular partition 23 may be directly measured. In this case, it is desirable to provide a mechanism for keeping the relative position of the temperature measuring element constant with respect to the outer peripheral surface of the annular partition 23 in consideration of the thermal contraction of the annular partition 23.

1 main steam pipe 1a forward switching valve 1b forward control valve 1c reheat steam warm pipe valve 2 steam pipe 3 reheat steam pipe 4 steam pipe 5 condensate pipe 6 reverse main steam pipe 6a reverse reverse valve 6b reverse control valve 8 water supply pipe 10 Main boiler 20 Medium-high pressure steam turbine 20a Main steam inlet 20b Nozzle chamber 20c Main steam outlet 20d Reheat steam chamber (low pressure steam chamber)
20e Reheat steam inlet 21 High-pressure steam turbine (high-pressure side turbine)
22 Medium-pressure steam turbine (low-pressure turbine)
23 annular partition part 23b seal ring 23c temperature sensor (first temperature measurement part)
24 Thermal shield ring 25 Car interior 26a Temperature sensor (2nd temperature measurement part)
26b Temperature sensor 30 Reheater 40 Low pressure steam turbine 50 Reverse turbine 60 Condenser 70 Condensate pump 80 Controller 90 Rotor shaft 100, 100 ′ Steam turbine equipment S1, S2 Space X axis

Claims (9)

A rotor shaft;
A high-pressure turbine that rotates the rotor shaft with high-pressure steam;
A low-pressure turbine that rotates the rotor shaft by low-pressure steam discharged from the high-pressure turbine;
An inner peripheral surface opposite to the outer peripheral surface of the rotor shaft is formed between the high-pressure turbine and the low-pressure turbine, and the high-pressure turbine and the low-pressure turbine are partitioned, and the low-pressure turbine is supplied to the turbine. An annular partition that forms part of a low-pressure steam chamber for supplying low-pressure steam discharged from the high-pressure turbine;
A first temperature measurement unit for measuring the temperature of the annular partition;
A steam turbine facility comprising: a control unit that controls to reduce the rotational speed of the rotor shaft when a temperature measured by the first temperature measurement unit is lower than a predetermined temperature.   2. The control unit according to claim 1, wherein the control unit controls the rotation speed of the rotor shaft to be reduced when a state in which the temperature measured by the first temperature measurement unit is lower than the predetermined temperature continues for a predetermined time. Steam turbine equipment. A rotor shaft;
A high-pressure turbine that rotates the rotor shaft with high-pressure steam;
A low-pressure turbine that rotates the rotor shaft by low-pressure steam discharged from the high-pressure turbine;
An inner peripheral surface opposite to the outer peripheral surface of the rotor shaft is formed between the high-pressure turbine and the low-pressure turbine, and the high-pressure turbine and the low-pressure turbine are partitioned, and the low-pressure turbine is supplied to the turbine. An annular partition that forms part of a low-pressure steam chamber for supplying low-pressure steam discharged from the high-pressure turbine;
A first temperature measurement unit for measuring the temperature of the annular partition;
A switching valve for switching whether or not to supply warm steam higher than a predetermined temperature to a flow path for supplying the low pressure steam to the low pressure side turbine;
Steam turbine equipment comprising: a control unit that controls the switching valve to supply the warm-up steam to the flow path when the temperature measured by the first temperature measurement unit is lower than the predetermined temperature.   The control unit controls the switching valve to supply the warm-up steam to the flow path when a state in which the temperature measured by the first temperature measurement unit is lower than the predetermined temperature continues for a predetermined time. The steam turbine equipment according to claim 3. A casing that houses the high-pressure turbine, the low-pressure turbine, and the annular partition,
A second temperature measuring unit that measures the temperature of the inner peripheral surface of the portion of the vehicle compartment that houses the annular partition,
The predetermined temperature is a temperature obtained by subtracting a threshold temperature from a temperature measured by the second temperature measuring unit or a temperature measured by the second temperature measuring unit. Steam turbine equipment.   The said 1st temperature measurement part measures the temperature of the space which is pinched | interposed by the outer peripheral surface of the said annular partition part, and the internal peripheral surface of the said vehicle interior, and is not connected with the said low pressure steam chamber. The steam turbine equipment described. A steam turbine facility according to claim 6;
A marine vessel comprising a propulsion device that generates a propulsive force by rotational power generated by the steam turbine facility. A rotor shaft, a high-pressure turbine that rotates the rotor shaft by high-pressure steam, a low-pressure turbine that rotates the rotor shaft by low-pressure steam discharged from the high-pressure turbine, the high-pressure turbine, and the low-pressure turbine Is formed between the high pressure side turbine and the low pressure side turbine, and the low pressure exhausted from the high pressure side turbine to the low pressure side turbine. A steam turbine equipment control method comprising an annular partition that forms part of a low-pressure steam chamber for supplying steam,
A first temperature measurement step for measuring the temperature of the annular partition;
A control method for steam turbine equipment, comprising: a control step of controlling to reduce the rotational speed of the rotor shaft when the temperature measured by the first temperature measurement step is lower than a predetermined temperature. A rotor shaft, a high-pressure turbine that rotates the rotor shaft with high-pressure steam, a low-pressure turbine that rotates the rotor shaft with low-pressure steam discharged from the high-pressure turbine, the high-pressure turbine, and the low-pressure turbine Forming an inner peripheral surface opposed to the outer peripheral surface of the rotor shaft between the high pressure side turbine and the low pressure side turbine, and low pressure steam discharged from the high pressure side turbine to the low pressure side turbine An annular partition that forms part of the low-pressure steam chamber for supplying the low-pressure steam, and a switching valve that switches whether or not to supply warm-up steam having a temperature higher than a predetermined temperature to the flow path for supplying the low-pressure steam to the low-pressure turbine. A steam turbine equipment control method comprising:
A first temperature measurement step for measuring the temperature of the annular partition;
A control method for steam turbine equipment, comprising: a control step of controlling the switching valve to supply the warm-up steam to the flow path when the temperature measured in the first temperature measurement step is lower than the predetermined temperature.

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