RU1778330C - Automatic and remote control system of power plant cooling - Google Patents

Abstract

Usage: the invention relates to the automation of propulsion systems, in particular to systems for automatically controlling the performance of a motor-fan, and can be used for remote and automatic control of cooling of a power plant. Purpose: improving reliability. SUMMARY OF THE INVENTION: the system comprises a motor-fan, an electric motor-fan control circuit with an operating mode switch and a remote control switch, a temperature-relay sensor and a contactor device. The system also contains a pneumatic line, including a temperature sensor, connected by its output signal to the control device, a positioner. The system is equipped with a first electro-pneumatic valve with two inputs and two outputs and a second electro-pneumatic valve with three inputs and one output. Between the first output of the electro-pneumatic valve and the first input of the second electro-pneumatic valve is a container. An adjustable throttle connected to the atmosphere is connected to the second output of the first electro-pneumatic valve. The first input of the electro-pneumatic valve is connected to the power supply line of the positioner, the second input is connected to the remote control switch, the second input of the electro-pneumatic valve is connected to the positioner, the third input is connected to the mode switch, and the output of the second electro-pneumatic valve is connected to the membrane cavity of the motor-fan. The system allows pneumatic unloading of the motor-fan at the moment of its start in remote mode, and the motor-fan is launched with a minimum angle of rotation of the blades. Positive effect: reduced aerodynamic drag, minimal energy consumption at startup, increased reliability and durability of starting contact electrical equipment. 2 ill. VI 00 from W about

Description

The invention relates to the field of automation of propulsion systems,

in particular to automatic control systems, productive

motor fan, and can be used in temperature control systems of heat carriers of heat engines, for example, diesel locomotive.

A known machine for automatically controlling the temperature of coolants of a diesel engine 2TE116, comprising motor fans, an electric control line for turning on the motor fans, including a mode switch, a remote control switch, contact devices and temperature sensors.

The closest in technical essence and the achieved result to the proposed solution is the automatic control system for cooling the power plant, mainly a diesel locomotive, containing at least one fan motor, an electric line for controlling the operation of the fan motor, including a mode switch, a switch remote control, contactor device, temperature sensors-relays, pneumatic line for controlling the operation of the motor-fan, including a series-connected a control device connected to a temperature sensor and a positioner to a power line.

A disadvantage of the known system is that when it is switched to the remote mode, the start of the motor-fans is performed with maximum productivity, because with this scheme of connecting control devices to a motor fan with rotary blades in the membrane cavity of the motor fan, the pressure level remains at which the blades are installed with the maximum

,

angle of rotation, which leads at startup to increased costs of electric energy, burning electrical contactors, reducing efficiency.

The aim of the invention is to increase durability

The goal is achieved in that, in contrast to the known automatic control system for cooling a power plant, mainly a diesel locomotive, containing at least one fan motor, an electric line for controlling the operation of the motor fan, including a switch

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operating modes, a remote control switch, a contactor device, temperature sensors, a pneumatic control line for the motor-fan, including a control device connected in series with a temperature sensor, and a positioner with a power line, the proposed system is equipped with a first electro-pneumatic valve with two inputs and two outputs, the second electro-pneumatic valve with three inputs and one output, a capacitance located between the first output of the first electro-pneumatic valve and the first the course of the second electro-pneumatic valve, and an adjustable throttle connected on the one hand to the second output of the first electro-pneumatic valve and on the other with the atmosphere, the first input of the first electro-pneumatic valve connected to the power line of the positioner, the second input to the remote control switch, the second input of the second electro-pneumatic valve to the positioner, the third input to the mode switch, and the output of the second electro-pneumatic valve to the motor-fan.

Fig. 1 is a functional diagram of a power plant remote and automatic cooling control system; Fig. 2 is a schematic diagram of an embodiment of a pneumatic unloading assembly of motor fans.

The system comprises a motor fan 1, an electric control line for turning on the motor fan 1, including an automatic-remote operation mode switch 2, a remote control switch 3. The operation mode switch 2 provides electrical activation of the motor fan 1 in an automatic system operation mode, short circuit electric circuit - temperature sensor-relay and contactor device 5, which provides direct switching on of motor-fan 1. Remote control switch 3 is intended n for energizing the fan motor 1 to the remote operating mode.

The system also includes a pneumatic control line for the operation of the motor-fan 1, which includes a temperature sensor 6 installed

in the coolant pipe and connected by its output signal to the control device 7, the positioner 8 connected to the power line. The control device 7 is connected in series with the positioner 8, where the control signal from the control device 7 is converted to the control signal for the movement of the membrane of the rotor mechanism of the blades of the motor fan 1. The system is equipped with a first electro-pneumatic valve 9 with two inputs and two outputs and a second electro-pneumatic valve 10 with three inputs and one output, Between the first output of the first electro-pneumatic valve 9 and the first input of the second electro-pneumatic valve 10 is a container 11. With a second output th electropneumatic valve 9 is connected to an adjustable throttle 12 communicates with the atmosphere. The first input of the first electro-pneumatic valve 9 is connected to the power line of the positioner

8, the second input to the remote control switch 3, the second input of the second electro-pneumatic valve 10 is connected to the positioner 8, the third

the input is to the switch of operating modes 2, and the output of the second electro-pneumatic valve 10 is to the membrane cavity of the motor-fan 1.

In FIG. 2 is a detailed schematic diagram of an embodiment of a pneumatic unloading assembly of a motor-fan 1, which is two electro-pneumatic valves interconnected

9.10. Valves 9, 10 are structurally identical to each other and represent, in this embodiment, an unloading unit, electro-pneumatic converters. Each of them contains: two separated cavities (respectively, b and d and e and f), connected by channels 1 and 11, the core of the electromagnet with a double-sided shutter 13, 1, mounted on a flat

a rubber fabric membrane freely moving between the nozzles Cj-C and. when applying an electrical signal to the electric coils 15 of each of these valves, while. opening and closing one of the nozzles.

The nozzle C of the electro-pneumatic valve 9 is connected to the input signal from the pneumatic power line of the positioner 8 and in the absence of an electric

This signal from the remote control switch 3 is a normally open contact, and the nozzle C "of the electro-pneumatic valve 9 connected to the atmosphere through an adjustable throttle 12 is a normally closed contact. Similarly, in the valve 10 in the absence of an electrical signal, in this case from the mode switch 2,

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nozzle C5, connected with pressure Ррм6 of positioner 8, is a normally open contact, and nozzle С 4. connected to the membrane cavity, and motor fan 1, is a normally closed contact.

The proposed system works as follows.

When the temperature of the coolant changes, the pneumatic output signal PA of the temperature sensor 6 changes, which enters the control device 7, where it is converted into an RFID control signal. The control signal Rtspr arrives at the positioner 8, which in turn generates a signal. directly acting on the membrane of the actuator of the rotation of the blades of the motor-fan 1, where it is converted into a movement of the membrane, the position of which determines the angle of the rotation of the blades of the motor-fan 1, and therefore the cooling mode, and this mechanism works in this way that, the greater the pressure in the membrane cavity, the smaller the angle of rotation of the blades.

In the automatic mode of operation of the system, the mode switch 2 (Fig. 1) is in such a position that no electric power is supplied to the coils 15 of the electro-pneumatic valves 9, 10 (Fig. 2). Moreover, under the action of the nozzle springs C Ј and. of these valves are closed, and nozzles C and C3 are open. The input signal of valve 9 from the pneumatic supply line to positioner 8 (Fig. 1) enters chamber b through channel 1 between chambers and flows into chamber d, through the second outlet of valve 9 to container 11, In this case, the pneumatic signal Rp ° t of the positioner 8 enters through the inlet of the electro-pneumatic valve 10 into chamber e and through channel 11 into chamber f, then through the second

its exit is into the membrane cavity of the rotation mechanism of the blades of the motor-fan 1, while the performance of the motor-fan 1 is controlled in the usual way. Thus, in the automatic mode of operation of the system, the inclusion of electro-pneumatic valves 9, 10 in the system does not affect the control process, since the pressure in the membrane cavity a is controlled by the Rdriv of the positioner 8, but the RPit pressure is shut off from the pneumatic line by

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C4, tank 11, chamber d, nozzle C2, and adjustable throttle The conductivity of the regulated choke 12 determines the time for which all air from the membrane cavity a will escape into the atmosphere, which led to a gradual decrease in the pressure of the membrane cavity a and, accordingly, an increase in the angle reversal of the jaws of the motor-fan torus 1 to the smallest.

Thus, pneumatic unloading of the motor

positioner 8 into the tank 11 is reached. "torus 1 at the time of its launch

preparation for pneumatic unloading of the motor-fan torus 1 when it is launched in the remote mode of the system.

In the remote operating mode, the mode switch 2 is in a position in which electric power is supplied to the coil 15 of the electro-pneumatic valve 10. Then, under the influence of 25 on the coil 15 of the electromagnet, the shutter Ik is drawn , overcoming the force of the spring, and thereby closes the nozzle Cj, while simultaneously opening the previously inlet of the closed nozzle C, while the signal RCVI & from the positioner 8 and into the membrane cavity a of the fan motor 1, a signal previously supplied to the capacitor 11 is received from the pneumatic supply line of the positioner 8. Thus, the maximum pressure is created in the membrane cavity, which determines the minimum angle of rotation of the blades, but the motor valve torus 1 does not rotate, because the remote control switch 3 is in the Off position. To turn on the motor-1 of the fan 1 in the remote mode, the remote switch 3 must be set to the On position, the electric circuit connected to the contact device 5} and the motor fan 1 will begin to rotate with a minimum angle of rotation of the blades. At the same time, an electric signal starts to be supplied to the coil 15 of the electro-pneumatic valve 9; in this case, the nozzle C (Fig. 2) closes, and the nozzle Cj opens, then from the membrane cavity 55 of the motor-fan 1 air will be blown into the atmosphere through camera f open sop35

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The application of the proposed system will reduce the cost of electric energy for its start-up in the remote mode, eliminate the raising of electric contactors, thereby increase the reliability and durability of contact electric equipment and the fan motor, as well as increase the efficiency of the entire installation.

Claims (1)

Invention formula A system for remote and automatic cooling control from a plant, mainly a locomotive containing at least one motor fan, an electric motor control line for the motor, including a press switch, a remote control switch, a contactor, sensors a temperature switch, a pneumatic control line of the motor-fan, including a series-connected control device connected to the temperature dates, and a positioner with a power line, characterized in that, in order to increase duration, it is equipped with a first solenoid valve with two inputs and outputs, a second solenoid valve with three inputs and one stroke, a container located between the first output of the first solenoid valve and the first input of the second tropnevalve, and an adjustable throttle connected to one with the second output of the first electric valve, and on the other with the mososphere, the first input of the solenoid valve connected to the line Bore C4, tank 11, chamber d, open nozzle C2 and adjustable throttle 12. The conductivity of the regulated throttle 12 determines the time during which all air from the membrane cavity a enters the atmosphere, which will cause a gradual decrease in pressure in the membrane cavity a and, accordingly, increase the angle of rotation of the blades of the motor-fan 1 to the maximum. In this way, pneumatic unloading of the motor-vels “torus of torus 1 at the moment of its start-up will be performed. at 5 5 0 5 0 remote mode The application of the proposed system will reduce the cost of electric energy for its remote start-up, eliminate the burning of electrical contactors, thereby increasing the reliability and durability of contact electrical equipment and the fan motor, as well as increase the efficiency of the entire installation. The claims A system for remote and automatic cooling control of a power plant, mainly a diesel locomotive, containing at least one motor fan, an electric motor-fan operation control line including an operating mode switch, a remote control switch, a contactor device, temperature sensors, a pneumatic line controlling the operation of the motor-fan, including a control device connected in series with a temperature sensor and a positioner with a line Itani, characterized in that, in order to increase durability, it is equipped with a first electro-pneumatic valve with two inputs and two outputs, a second electro-pneumatic valve with three inputs and one output, a container located between the first output of the first electro-pneumatic valve and the first the input of the second solenoid valve, and an adjustable throttle connected on one side to the second output of the first solenoid valve, and on the other with the atmosphere, the first input of the first solenoid valve connected to the power line of the positioner, W swarm input - to a remote control switch, the second input of the second electro-pneumatic valve is coupled to the position t Ј Nehru, the third input - to the switch of operating modes, and the output of the second solenoid valve - to the motor-fan. Figure 2.