JP2759634B2 - Transmission control device for underwater vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift control device for a power unit of an underwater vehicle.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a shift control line system of a conventional underwater vehicle power unit.

The type shown in FIG. 4 is for increasing the degree of vacuum at the outlet of the condenser 3 between the condenser 3 and the water supply pump 4 and also increasing the inlet pressure of the downstream water supply pump 4. Condensate pump 4a
It is the same as the model of FIG.

In FIG. 4, the controller 6 is not shown in order to avoid redundancy.

[0005] In these figures, 1 is a combustor for generating steam, 2 is a turbine that rotates by the steam generated in the combustor 1, and 3 is a turbine for rotating a propeller (not shown), and 3 is steam discharged from the turbine 2. Condenser 4 for cooling water and returning it to water, 4 is a water supply pump for supplying water generated in the condenser 3 to the combustor 1, 4a is the above-described condensate pump, 5a
Controls the amount of steam generated by returning an appropriate amount of water supplied to the combustor 1 to the upstream side of the water supply pump 4 to thereby control the amount of steam generated.
A return pipe for controlling the number of rotations of 5, a water control valve interposed in the return pipe 5a, 6 detects the number of rotations of the turbine 2,
Thereby, a controller for controlling the opening degree of the water control valve 5, 9 is a main steam pipe for supplying steam from the combustor 1 to the turbine 2, and 10 is a gas for ejecting lithium into the combustor 1 and not shown. Oxidizing agent SF ₆ that causes an oxidation reaction with fuel
Is an SF ₆ control valve for controlling the pressure.

The operation principle of the above-mentioned device is itemized for simplicity as follows (1) to (8). The description is based on FIG. 3, and the rotation speed is based on the rotation speed of the shaft of the turbine 2 as shown. (1) A control current proportional to the difference between the current rotational speed and the set rotational speed is supplied from the controller 6 to the water control valve 5. (2) The opening of the water control valve 5 is determined in proportion to the magnitude of the control current. (3) The amount of water returned through the return pipe 5 a controlled by the water control valve 5 is determined by the opening of the water control valve 5 and the discharge pressure of the water supply pump 4. (4) The amount of water supplied to the combustor 1 is determined by the difference between the amount of water discharged from the water supply pump 4 and the amount of water returned. (5) The amount of heat (combustor output) given to the water supply in the combustor 1 is determined by the opening of the SF ₆ control valve 10. (6) The opening degree of the SF ₆ control valve 10 is determined by the combustor outlet steam temperature. (7) The output of the turbine 2 is determined by the steam conditions (pressure and temperature) at the turbine inlet, the degree of vacuum of the condenser 3, the amount of steam flowing into the turbine, and the turbine efficiency. (8) The number of revolutions is determined by the shaft end output obtained by subtracting the auxiliary equipment drive output of the feed water pump 4 and the like and the mechanical loss from the turbine output.

[0007]

The conventional underwater vehicle power unit has the following problems to be solved. (1) Rapid shifting is difficult. That is, in the conventional device, steps must be taken according to the following arrows in order to realize a shift.

[0008] Shift command → water control valve control signal change → water control valve opening change → water feed return change → combustor inflow water supply change → combustor outlet steam temperature change → SF ₆ control valve opening change →
Change in combustor output → change in turbine output → change in rotation speed → achieved shift.

[0009] Among them, there is a problem that the response delay of the change in the combustor output is extremely large, and it is difficult to perform a quick shift. (2) It is difficult to secure low-speed output. That is, SF ₆
Due to clogging of the nozzle, the lower limit opening of the SF ₆ control valve 10 is determined, the combustor output becomes larger than the target lower limit, and there is a problem that it is difficult to secure a low speed output.

In order to solve the above-mentioned problems, the present invention provides an underwater vehicle in which the dryness and wetness of steam entering a turbine are quickly controlled or the outlet pressure of a condenser is quickly controlled to improve the shift response. It is an object of the present invention to provide a shift control device.

[0011]

According to the present invention, there is provided an underwater vehicle speed control apparatus as described in the following (1) and (2) as means for solving the above-mentioned problems. (1) A combustor that generates steam, a turbine that operates with steam from the combustor to rotate a propeller, a condenser that condenses steam discharged from the turbine, and a condenser that condenses steam discharged from the turbine. A water supply pump for supplying water to the combustor, a return pipe provided to allow water to return from the discharge side to the inlet side of the water supply pump, and a main steam pipe for communicating the combustor with the turbine. In the shift control device for an underwater vehicle including: a spray nozzle provided so as to be able to jet water toward the main steam pipe, a spray pipe communicating the spray nozzle with the discharge port side of the water supply pump, A shift control device for an underwater vehicle, comprising: an ON-OFF control valve disposed in the middle of the spray pipe. (2) A combustor that generates steam, a turbine that operates by the steam from the combustor to rotate a propeller, a condenser that condenses steam discharged from the turbine, and a condenser that condenses steam discharged from the turbine. A water supply pump for supplying water to the combustor, a condensate pump interposed on the upstream side of the water supply pump, and a flow provided so that water can return from the discharge side of the water supply pump to the inlet side. A transmission control device for an underwater vehicle including a road and a main steam pipe communicating the combustor and the turbine;
A reservoir tank for air / water separation interposed between the water supply pump and the condensate pump, a pipe communicating the reservoir tank with the inlet side of the condensate pump, and an ON-
A shift control device for an underwater vehicle, comprising: an OFF valve.

[0012]

The present invention is configured as described above and has the following effects. (1) In the configuration of the above (1), when shifting from high-speed rotation to low-speed rotation, ON-OFF on the spray pipe is required.
The control valve is opened and the water supply is sprayed from the spray nozzle into the main steam pipe. The sprayed feedwater mixes with the superheated steam at the combustor outlet to become wet steam and flow into the turbine.

In the wet steam range, the turbine efficiency becomes extremely poor, so that a low-speed output can be ensured.

At the time of shifting from low-speed rotation to high-speed rotation, the ON-OFF control valve is closed, the amount of spray water is exhausted, and wet steam is rapidly eliminated. (2) In the configuration of (2) above, at the time of transition from high-speed rotation to low-speed rotation, the control unit of the underwater vehicle sends a shift signal to an ON-OFF valve serving as a turbine exhaust pressure adjustment valve. Sent and the ON-OFF valve opens. As a result, the compressed non-condensable gas turns on in the reservoir tank for steam separation.
-It is sent to the inlet of the condensate pump via the OFF valve and the pipe. Then, the suction characteristics of the condensate pump deteriorate due to the non-condensable gas, and the degree of vacuum of the condenser decreases. As a result, turbine exhaust pressure increases, turbine output decreases,
The rotation speed becomes low speed, and low speed output is secured. When shifting from low-speed rotation to high-speed rotation, the ON-OFF valve forming the turbine exhaust pressure adjustment valve closes, the suction characteristics of the condensate pump improve, the degree of vacuum in the condenser increases, and the turbine output recovers quickly. Then, it becomes high-speed rotation.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described with reference to FIG. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted unless necessary.

In FIG. 1, reference numeral 8 denotes a water supply spray nozzle provided so as to be capable of jetting water into a main steam pipe 9;
Is a spray pipe communicating between the water supply spray nozzle 8 and the discharge port side of the water supply pump 4, and 7 is an ON-OFF control valve interposed in the middle of the spray pipe 7a. Other configurations are the same as the conventional example.

Next, the operation of the above configuration will be described.

When a control signal for shifting from high-speed rotation to low-speed rotation is issued from the control unit of the underwater vehicle (not shown), the ON-OFF control valve 7 on the spray pipe 7a opens, and water is supplied through the spray pipe 7a. Spray is performed from the water supply spray nozzle 8 into the main steam pipe 9. The diameter and number of the water supply spray nozzles 8 are determined in accordance with the water supply spray nozzles 8.
, And the amount of water required to turn the superheated steam at the outlet of the combustor 1 into wet steam.

A main steam pipe 9 is provided by a water supply spray nozzle 8.
The supply water sprayed therein mixes with superheated steam at the outlet of the combustor 1 and flows into the turbine 2 as wet steam. In the wet steam range, the turbine efficiency is extremely deteriorated, so that the rotation speed is rapidly reduced, and the low-speed output is secured.

ON when shifting from low-speed rotation to high-speed rotation
Since the OFF control valve 7 is closed and the amount of spray water into the main steam pipe 9 disappears and the wet steam correspondingly disappears rapidly, the rotation quickly shifts to high speed.

Next, a second embodiment according to the second aspect of the present invention will be described with reference to FIG.

In FIG. 2, reference numeral 11 denotes an air / water separation reservoir tank interposed between the water supply pump 4 and the condensate pump 4a, and 11a denotes a gas phase of the air / water separation reservoir tank 11 and a condensate pump 4a. A pipe communicating with the inlet side, 12 is a pipe 11a
This is a turbine exhaust pressure adjusting valve including an ON-OFF valve interposed in the turbine. The return pipe 5a is opened in the gas-water separation reservoir tank 11 as shown in the drawing, and the returned water is ready to be sucked by the water supply pump 4.

The other structure is the same as that of the conventional example shown in FIG.

Next, the operation of the above configuration will be described.

At the time of the transition from the high-speed rotation to the low-speed rotation, a shift signal is sent from a control unit (not shown) of the underwater vehicle to the turbine exhaust pressure regulating valve 12, and the turbine exhaust pressure regulating valve 12
open. As a result, the non-condensable gas compressed in the water / water separation reservoir tank 11 is sent to the inlet of the condensate pump 4a through the pipe 11a via the turbine exhaust pressure regulating valve 12. Then, the suction characteristics of the condensate pump 4a deteriorate due to the non-condensable gas, and the degree of vacuum of the condenser 3 decreases. As a result, the exhaust pressure of the turbine 2 increases, the turbine output decreases, and the rotation speed becomes low. Thus, a low-speed output is ensured. At the time of shifting from low-speed rotation to high-speed rotation, the turbine exhaust pressure regulating valve 12 is closed, non-condensable gas to the inlet of the condensate pump 4a is cut off, the suction characteristics of the condensate pump 4a are improved, and the condenser 3 , The turbine output is quickly recovered, and high-speed rotation is achieved.

As described above, according to the first embodiment, the ON-O
According to the second embodiment, by opening the FF control valve 7 to rapidly increase the wet steam in the main steam pipe 9 toward the turbine 2 and reduce the output of the turbine 2,
By opening the turbine exhaust pressure regulating valve 12 composed of an N-OFF valve, non-condensable gas is sent from the water / water separation reservoir tank 11 to the inlet side of the condensate pump 4a, and the exhaust pressure of the turbine 2 is increased to increase the output of the turbine 2. Has the advantage that a low-speed output can be ensured for each.

According to the first embodiment, ON-OFF
By closing the control valve 7, the wet steam generated in the main steam pipe 9 is rapidly eliminated, and the output of the turbine 2 is increased, and according to the second embodiment, the ON-OF
By closing the turbine exhaust pressure regulating valve 12 composed of the F valve, the supply of the non-condensable gas to the inlet of the condensate pump 4a is cut off, and the exhaust pressure of the turbine 2 is rapidly decreased to increase the output of the turbine 2. Each has the advantage that high speed rotation can be reached quickly.

[0028]

According to the first aspect of the present invention, the following effects can be obtained since the above configuration is adopted. (1) By spraying the water supply in the main steam pipe,
Since the turbine output immediately decreases, there is no delay in the response of the combustor, and thus quick shift control is possible. (2) Conventionally, the clogging of the SF ₆ nozzles of the combustor, S
The lower limit flow rate of F ₆ is limited, therefore, at least the combustor output for low speed operation, but it was impossible decrease the combustor output, low speed can operate the turbine output by water spray according to the present invention Output can be reduced. (3) During low-speed operation, the condenser heat capacity is reduced, so that the degree of vacuum of the condenser is improved. Therefore, the rise from the low-speed operation to the high-speed operation can be smoothly performed.

According to the second aspect of the present invention, the following effects can be obtained since the above configuration is adopted. (4) By sending the non-condensable gas to the inlet side of the condensate pump, the suction characteristics of the condensate pump become extremely poor.
The degree of vacuum in the condenser is reduced and the exhaust pressure of the turbine is increased smoothly, so that quick shift control is possible. (5) Conventionally, due to clogging of the SF ₆ nozzle of the combustor, S
The lower limit flow rate of F ₆ is limited, the combustor output but it was impossible decrease, the turbine output by operating the ON-OFF valve which forms a turbine exhaust pressure control valve according to the present invention low-speed operation possible output Can be dropped.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams of a shift control device for an underwater vehicle according to a first embodiment of the present invention, wherein FIG. 1A is a system diagram of a shift control line, and FIG.
Is an enlarged vertical sectional view of the enclosure B in (a),

FIG. 2 is a system diagram of a shift control line including a shift control device for an underwater vehicle according to a second embodiment of the present invention;

FIG. 3 is a system diagram of a conventional shift control line,

FIG. 4 is a system diagram of another conventional shift control line.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Combustor 2 Turbine 3 Condenser 4 Feedwater pump 4a Condensate pump 5 Water control valve 5a Return pipe 6 Controller 7 ON-OFF control valve 8 Feedwater spray nozzle 9 Main steam pipe 10 SF ₆ Control valve 11 Reservoir for steam separation Tank 11a Pipe 12 Turbine exhaust pressure adjustment valve (ON-OFF valve)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F42B 19/12-19/14 F42B 19/18 G05D 13/62 B63G 8/10 F01K 15/02 F22D 11 / 00

Claims (2)

(57) [Claims] 1. A combustor for generating steam, a turbine operated by the steam from the combustor to rotate a propeller, a condenser for condensing steam discharged from the turbine, and a condenser for condensing steam discharged from the turbine. A water supply pump that supplies water from the
In a shift control device for an underwater vehicle including a return pipe provided to allow water to return from the discharge side to the inlet side of the water supply pump and a main steam pipe communicating the combustor and the turbine, A spray nozzle provided in the main steam pipe so as to be capable of jetting water, a spray pipe communicating the spray nozzle with a discharge port side of a water supply pump, and an ON-OFF interposed in the middle of the spray pipe. A shift control device for an underwater vehicle, comprising: a control valve. 2. A combustor for generating steam, a turbine operated by steam from the combustor to rotate a propeller, a condenser for condensing steam discharged from the turbine, and a condenser for condensing steam discharged from the turbine. A water supply pump that supplies water from the
A condensate pump interposed on the upstream side of the water supply pump, a flow path provided to allow water to return from the discharge side to the inlet side of the water supply pump, and a main line communicating the combustor with the turbine. In a transmission control device for an underwater vehicle including a steam pipe, a reservoir tank for separating steam and water interposed between the feed pump and the condensate pump, and an inlet side of the reservoir tank and the condensate pump A transmission control device for an underwater vehicle, comprising: a pipe that communicates with an ON-OFF valve; and an ON-OFF valve interposed in the pipe.