SU1183418A1 - Device for controlling ship turbine unit with variable-pitch propeller - Google Patents

Abstract

1. A DEVICE FOR CONTROLLING A SHIP TURBO-AGGREGATE WITH A SCREW OF A REGULATED PITCH, containing a turbine speed control unit connected to the turbine speed sensor and a mode setpoint device through one of the non-linear converters via another input nonlinear converter, and the other with the output of the pitch correction unit, one of the inputs of which is connected to a turbine speed sensor, characterized in that, in order to increase the efficiency of the turbo Gregat, it is equipped with a unit for generating mode correction signals, connected to one and the other of its outputs by one input by two adders, torque sensors of the propeller shaft, screw pitch and vessel speed, connected respectively to the first, second and third inputs of the mode correction signal generating unit, the fourth, fifth and sixth inputs of which are connected respectively to the turbine speed sensor and the outputs of one and the other non-linear converters connected to other inputs of the total oops.

Description

00 oo

four

2. The device according to claim 1. characterized in that the block for generating mode correction signals contains dividers, multipliers, non-linear transducers, a square root extractor and deceleration elements performed on operational amplifiers whose outputs are outputs of the block, one of the inputs - its fifth and sixth inputs, and the other inputs are connected to the outputs of one and the other multipliers, one and the other inputs of which are connected respectively to the output of the third multiplier and the outputs of the one and the other non-linear converters, i rows which are t.rvym and the third input block and merged with one input of the fourth multiplier and the first, second and third dividers, the other input of which the latter is connected to the output of the element square root,. connected by the input to the output of the third multiplier connected by one and other inputs to the outputs of the fourth and fifth multipliers, the inputs of the last of which are connected respectively to the outputs of the third nonlinear converter and the sixth multiplier, one input of which is the second input of the block and the other through the fourth the non-linear converter is connected to the seventh multiplier, the inputs of which are combined respectively with the output of the second divider, the other input of which is the fourth input of the block, through the fifth non-linear Converter with the output of the third divide, l.

one

This invention relates to automation of ship steam turbines, which drive a variable pitch propeller.

The purpose of the invention is to increase the efficiency of a turbine unit with an adjustable pitch propeller by automatically correcting the program Rotation Frequency — Pitch as the floating conditions change. FIG. 1 shows a functional diagram of the device; in fig. 2 is a functional block diagram of the formation of mode correction signals.

The device (Fig. 1) contains a mode setpoint 1, connected through nonlinear converters 2 and 3 to one inputs of adders 4 and 5, the other inputs of which are connected to one and the other outputs of the unit 6 for generating mode correction signals, the first and second inputs of which are connected to torque sensors 7 and 8 of the propeller shaft and screw pitch, respectively. The third and fourth inputs of block 6 are connected to sensors 9 and 10 of the turbine speed and speed of the vessel, respectively, and the fifth and sixth inputs of block 6 are connected to the outputs of converters 2 and 3.

The output of the adder 4 is connected to the same inputs of the frequency controller 11, the turbine rotation and the screw pitch correction unit 12 of the adjustable pitch (without position) with the pitch changing mechanism 13 connected to the output of the ct1g control unit 14, one and the other inputs of which are connected to the outputs of the block 12 and adder 5.

At the outlet of the regulator 11 a shunting valve 15 is connected ..

Block 6 (Fig. 2) contains the deceleration elements 16 and 17 performed on the operational amplifiers, dividers 18-20, multiply jHl 21-27, non-linear converters 28-X2 and square extraction element 33.

The device works as follows.

To change the ship's travel, the operator moves the travel control knob, which acts on the mode setpoint 1, the signal of which is transmitted by non-linear transducers 2 and 3.

The converter 2 generates a signal for setting the rotational speed of the turbine unit (pz) depending on the ship’s predetermined travel. This signal through the first adder 4 is fed to the tuning input of the rotational frequency controller 11, which, receiving a feedback signal from the sensor 9 and acting on the shunting valve 15, supports the predetermined rotational speed of the turbine unit and the associated screw.

The second transducer 3 generates a signal for setting the pitch of the propeller (Hz) depending on the given course of the vessel. This signal through the second adder 5 is fed to the input of the pitch control unit 14, which, acting on the pitch changing mechanism 13, rotates the propeller blades to the position of the predetermined gate.

In this way, a software link is implemented. The rotational speed is a step for different speeds of the vessel in the calculated conditions of navigation.

During the maneuvers, it is possible to overload the turbine unit with respect to the moment of resistance, caused by it the “failure of the rotation frequency and the deterioration in the pick-up capacity of the vessel. To reduce these occurrences, a block 12 is used, the output of which produces a signal proportional to the deviation of the actual rotational frequency from the one set at a higher value of the latter, if this deviation exceeds the amount of irregularity of the regulator 11.

The output signal from block 12 is fed to the second input of block 14, carried out a shift of a given step in the direction of its reduction modulo. This reduces the turbulent overload and improves the responsiveness of the vessel.

In the proposed system, the program Rotation Frequency - Step, which ensures economical operation of the turbine unit under the estimated navigation conditions, is fixed in nonlinear converters 2 and 3. When sailing in conditions different from those calculated, for example, with headwind, waves, modified draft "Overgrown housing, when the resistance to movement of the housing is different from the calculated one, this program ceases to be optimal and requires adjustment to improve the efficiency of the turbine unit. The latter is generated by block 6 and is connected via the second inputs of adders 4 and 5.

Unit 6 receives information from sensor 9, from the torque sensor 7 of the propeller shaft, from the screw pitch sensor 8, from the ship's speed sensor 10, and signals (pz) and N.Z from the nonlinear transducers 2 and 3, respectively.

Using this information, block 6 determines the effective resistance to the movement of the vessel R and, at its outputs, produces mode correction signals. These signals arrive at the second inputs of adders 4 and 5.

Block b works as follows.

Its inputs receive signals Pz and Nz from nonlinear converters 2 and 3, from vessel speed sensor 10, from rotation speed sensor 9, from screw pitch sensor 8 and from torque sensor / torque on the row shaft, and on the first and second Outputs are produced by the mode correction signals An and AH, respectively.

The signal from sensor 10 is fed to the inputs of nonlinear converters 28 and 29, the outputs of which produce signals 2 and f |, respectively, to the input of divider 18 and together with the signal n to the inputs of dividers 19 and 20, the outputs of which generate signals and, respectively.

The signal is fed to one input of the multiplier 25, to the other input of which a signal is received from the sensor 7. Its resulting output signal is fed to the input of the multiplier 24.

The other input of the divider 18 receives the signal of the criminal code from the square-root element 33 and is scaled in accordance with the coefficient Ki. As a result, the output of block 18 produces a signal

to „K | V.

This signal is fed to the inputs of nonlinear converters 30 and 32, the outputs of which produce signals f4 and fa, respectively.

The signals f4 and go to the inputs of the multiplier 21, the output of which produces the signal X. This signal is fed to the input of the converter 30, the output

which is formed signal fs. The signal fs, together with the signal H, is fed to the inputs of multiplier 22, the output of which produces a signal.

The signal, together with the signal 1h, goes to the inputs of the multiplier 23, the output of which produces a signal which, acting on another input of the multiplier 24, forms the output signal R at its output. The latter arrives at the input of the element 33, thereby closing the feedback.

Upon completion of the in-appliance transient, the output of multiplier 24 is set to a stable value of signal R.

The signal R is also fed to the inputs of multipliers 26 and 27, to the second inputs of which signals fi and f2 are received, respectively. As a result, the signals n and HR are formed at their outputs, respectively.

The signal P3 is fed to the input of the element 16, to the other input of which the signal PC arrives, and at the output a signal is generated

I

(Pz - Pts),

An

TR + 1

where T is the time constant of the retarder;

R -7-hL

Signal NS is fed to the input element

17, the other input of which receives the HK signal, and the output signal is generated

I

{Yaz-Ya ").

AND I

TR + 1

The time constants (T) of the elements 16 and 17 are formed both by the RC feedback circuits of the operational amplifiers and by the number of series-connected amplifiers with RC circuits in the vol. connection, which provides the necessary time delay signals Dp and LN,

5 (1

Thus, certain and necessary deceleration of the signals of automatic correction of the modes of the turbine unit with the CPP during sailing of the vessel under off-design conditions is provided.

Claims (2)

1. DEVICE FOR CONTROL OF A SHIP TURBO UNIT WITH A SCREW OF AN ADJUSTABLE STEP, comprising a turbine speed controller connected by inputs to a turbine speed sensor and a mode dial via one of the nonlinear converters, a screw pitch control unit connected by one input to the mode dial via another non-linear converter the driver, and the other with the output of the step correction block, one of the inputs of which is connected to the turbine speed sensor, characterized in that, in order to increase the efficiency of the turbine unit one, it is equipped with a mode correction signal generating unit, connected to one and the other of its outputs by one input with two adders, propeller shaft torque sensors, propeller pitch and ship speed sensors, respectively connected to the first, second and third inputs of the mode correction signal generating unit, fourth , the fifth and sixth inputs of which are connected respectively to the turbine speed sensor and the outputs of one and the other nonlinear converters connected to other inputs of the adders. SU ,, „1183418 I 183418 2. The device according to π. 1, characterized in that the block for generating mode correction signals contains dividers, multipliers, nonlinear converters, a square root extraction element, and deceleration elements made on operational amplifiers, the outputs of which are the outputs of the unit, one of its inputs is its fifth and sixth inputs, and other inputs connected to the outputs of one and the other multipliers, one and the other inputs of which are connected respectively to the output of the third multiplier and the outputs of one and the other nonlinear converters, the inputs of which are I block the first and third inputs and combined with one input of the fourth multiplier and the first, second and third dividers, the other input of the latter koto ryh connected to the output of the square root extraction member,. connected by an input to the output of the third multiplier, connected by one and the other inputs to the outputs of the fourth and fifth multipliers, the inputs of the last of which are connected respectively to the outputs of the third non-linear converter and the sixth multiplier, one input of which is the second input of the block, and the other through the fourth non-linear converter is connected with a seventh multiplier, the inputs of which are combined respectively with the output of the second divider, the other input of which is the fourth input of the block, and through the fifth nonlinear driver with the output of the third divide, la.