RU84468U1 - DEVICE FOR REGULATING THE TEMPERATURE REGIME OF SHIP DIESELS - Google Patents

Abstract

1. A device for controlling the temperature of marine diesel engines, comprising an open inner circuit, including an expansion tank of open type and a closed inner circuit, including an expansion tank of closed type; temperature and load sensors; control valve; comparison block; the control unit further comprises a switch of the expansion tanks, the input of which is connected to the internal circuit of the cooling system, and the output is connected to the expansion tanks. ! 2. The device according to claim 1, characterized in that the switch contains an electric heating element mounted outside the cooling medium, the input of which is connected to the control unit, the output through a solid filler, the rod is connected to a control valve.

Description

The utility model relates to engine building and can be used in internal combustion engines of raid and port vessels, as well as in diesel engines of fishing vessels, etc.

The operation of most of the above-mentioned vessels under operating conditions is characterized by frequent and abrupt changes of modes, therefore, regulation of the temperature regime is of current importance.

Known engine cooling system [1]. The cooling system consists of an internal circuit and an external circuit. The internal circuit of the cooling system contains a cooling jacket, a circulation pump, an actuator, an expansion tank. The proposed internal circuit of the cooling system is an open type system, so the temperature of the cooling water in it cannot exceed 95 ° C, because as studies show, at a temperature of cooling water above 95 ° C, wall boiling is observed and there is a risk of film boiling in the stump space, which is not permissible in ICE.

The closest technical solution is the cooling system of a transport internal combustion engine [2]. The cooling system consists of an internal circuit of open and closed types. The open type internal circuit is connected to the internal circuit using a three-way valve, which is driven in 1 action by an electric actuator made in the form of an electric motor with a gearbox. This system has the following disadvantages.

The electric actuator is large, which negatively affects the overall size of the marine diesel installation. In addition, the electric actuator has a high cost, which leads to a rise in the cost of diesel.

The inventive device solves the problem of creating a cooling system with open and closed internal circuits, which depending on the load switch from one state to another.

The technical result in this case is the creation of a simple, compact, cheap design of the temperature switch of the cooling system.

The technical result is achieved in that in the known device for regulating the temperature of cooling water, comprising an open inner circuit including an expansion tank of an open type and a closed inner circuit including an expansion tank of a closed type; temperature and load sensors; control valve; comparison block; the control unit further comprises a switch of the expansion tanks, the input of which is connected to the internal circuit of the cooling system, and the output is connected to the expansion tanks. In addition, the switch contains an electric heating element installed outside the cooling medium, the input of which is connected to the control unit, the output is through a solid filler, the rod is connected to a control valve.

The drawing (Fig. 1) shows a device for controlling the temperature of a marine diesel engine. The device comprises a switch housing 1; switch nozzles: 2 - for receiving cooling water from the internal circuit, 3 - for communication with the expansion tank 22 of the open type, 4 - for communication with the expansion tank 23 of the closed type; channel of the internal circuit of the cooling system 5; cooling water supply ducts 6, 7 to expansion tanks 22, 23; stock 8; control valve 9; valve seats 10, 11; rubber sleeve 12; solid filler 13; glass 14; heat-insulating cylinder 15; heat exchanger 16; electric heating element 17; O-rings 18, 19; spring 20; mounting screws 21; expansion tank open type 22, expansion tank closed type 23; diesel 24; comparison unit 25; control unit 26; the setter 27; temperature sensors 28 and load 29; power supply unit 30; make contact 31; power supply channels 32, 33, signal supply channels 34, 35, 36; channels of the internal circuit of the cooling system 37, 38, 39, 40.

The main parts for opening and closing the valve 9 are the solid filler 13 and the electric heating element 17 and the spring 20.

Currently, thermostats of cooling systems widely use sensitive elements with solid filler, which have the following advantages [4, p. 201]:

- develop significant permutation forces - 100 kgf or more;

- have large displacements per unit mass of filler - the stroke of the rod reaches 20 mm or more at 1-8 g of filler;

- insensitive to the influence of external pressure on the characteristic of the sensor;

- have increased stability;

- have increased resistance to mechanical damage, vibration, shaking and corrosion;

- have a simple design, have small dimensions, weight and cost. The use of a solid filler in our device will make it possible to obtain a compact switch having a simple design and low cost.

In addition, to drive 2-3 g of filler, small power is required, therefore, in the design of the switch for driving solid filler, an electric heating element 17 is used, and it is installed outside the aqueous medium. This design allows the convenience of installation and operation of the electric heating element 17 and the ability to automatically adjust the proposed device [3, 5 (p. 301)].

A device for controlling the temperature of marine diesel engines is as follows. Moreover, depending on operating conditions, two operating modes can be applied.

1. The vessel operates constantly at rated loads and the temperature regime of the cooling water must be constant.

In this case, the closing contact 31 is turned off, the valve 9 is in the closed position under the action of the spring 20, i.e. pressed against the seat 10, as a result of which the pipe 4 is closed, cooling water does not pass into the expansion tank 23 of the closed type. Then the pipe 3 is open and the cooling water of the cooling system from the diesel 24 passes through the channels 37, 38 through the pipes 2, 3 of the switch and through the channel 6 enters the expansion tank 22 of the open type and the internal circuit of the cooling system becomes open. Another part of the cooling water flow through channel 39 goes to the temperature regulator and heat exchanger (these positions are not shown in FIG. 1) and returns to diesel 24 through channel 40. In this case, the pressure in the cooling system becomes lower than atmospheric and the temperature of the cooling water is maintained according to the set value , for example 80-85 ° C.

2. The vessel is constantly operating at idle and partial loads. In this case, the temperature regime in the cooling system should be high, for example 95-100 ° C. In this case, the signals from the temperature sensors 28, load 29 and the setter 27 are received in the comparison unit 25, where a mismatch signal is generated, which is transmitted to the control unit 26. The control unit 26 generates a control signal, which is supplied to the electric heating element 17. From the electric heating element 77 heat exchanger 16 and as a result of heat transfer transfers heat through the glass 14 to the solid filler 13. As a result of heat exchange, the solid filler expands and actuates the stem 8 with valve 9. Valve 9 opens yvaet nozzle 4 closes conduit 3, whereby through nozzles 5, a body 1, pipe 4, the cooling channel system 7 is connected to the expansion tank 23 closed type, wherein the inner contour of the cooling system becomes closed. At the same time, the pressure and temperature of the cooling water in the internal circuit increase, for example, to 95-100 ° C.

Before stopping the diesel, the make contact 31 is turned off and the power supply is de-energized. The cooling system goes into operating mode No. 1, at low loads, the diesel engine drops to a low level, for example, to 60-65 ° C and the diesel engine is stopped.

Thus, a device for regulating the temperature conditions of marine diesel engines on raid and port vessels, etc. allows you to maintain the nominal temperature regime of the cooling system and, accordingly, operate at the optimum thermal state at all operating modes of the diesel engine, which increases the technical and economic indicators of its operation.

Information sources

1. Patent 2085753. Russia, F01P 3/20. ICE cooling system / V.N. Timofeev, V.L. Lavrentiev. Published in BI No. 21 07/27/97.

2. Patent 56967. Russia, IPC F01P 7/16. The cooling system of a transport internal combustion engine / V.N. Timofeev, D.V. Timofeev. Publ. in BI №27 09/27/2006.

3. Patent 2270923. Russia, IPC F01P 7/16. Electric thermostat / V.N. Timofeev, N.P. Kuzin, A.N. Krasnov. Publ. 27.02.2006.

4. Petrichenko P.M. Liquid cooling systems for high-speed internal combustion engines. L., "Mechanical Engineering", 1975. 224 p.

5. Internal combustion engines. In 3 book Book 2. Dynamics and design: Textbook for high schools / V.N. Lukanin, I.V. Alekseev, M.G. Shatrov and others. - M.: Higher. school, 2005 .-- 400 p .: ill.

Claims (2)

1. A device for controlling the temperature of marine diesel engines, comprising an open inner circuit, including an expansion tank of open type and a closed inner circuit, including an expansion tank of closed type; temperature and load sensors; control valve; comparison block; the control unit further comprises a switch of the expansion tanks, the input of which is connected to the internal circuit of the cooling system, and the output is connected to the expansion tanks. 2. The device according to claim 1, characterized in that the switch contains an electric heating element mounted outside the cooling medium, the input of which is connected to the control unit, the output is through a solid filler, the rod is connected to a control valve.