RU2374091C2 - Radiator of cooling system of vehicle propulsion unit - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used at construction and manufacturing of radiators of cooling systems of propulsion units of vehicles. Radiator of cooling system consists of filler neck, left and right tank, tubular core, inlet and outlet branch pipe, installed on frame. Device is outfitted by piston, thermostat and pilot pin located in the left tank. Piston together with build in thermostat is located on pilot pin installed rigidly in casing of the left tank. The left tank is hydraulically connected to outlet branch pipe and through tubular collar to the right tank to outlet branch pipe and filler neck.

EFFECT: thermal effectiveness increasing of radiator.

1 dwg

Description

The invention relates to mechanical engineering and can be used in the design and manufacture of radiators for cooling systems of power plants of vehicles.

Known radiator [1] (prototype) of the cooling system of a power plant of a vehicle, which contains a filler neck with a plug, left and right tanks, frame, tubular core, inlet and outlet pipes.

The disadvantage of this design of the radiator is its inefficient thermal performance at various ambient temperatures, since its design is designed to ensure the temperature of the power plant at the maximum ambient temperature (up to + 45 ° C) [2, p. 195], and at ambient temperatures air below the maximum radiator is undercharged.

The invention is aimed at improving the thermal efficiency of the radiator.

The technical result is achieved by the fact that the proposed radiator containing the filler neck, left and right tanks, a tubular core, inlet and outlet pipes mounted on the frame, while it is additionally equipped with a piston, thermostat and a guide rod located in the left tank, and the thermostat is mounted in the piston, with which they are located on a guide rod mounted rigidly in the housing of the left tank, hydraulically connected to the inlet pipe, and through the tubular core with the right tank, yhodnym nozzle and filler neck.

A distinctive feature of the prototype is that the radiator is additionally equipped with a piston, thermostat and rod located in the left tank.

The drawing shows a radiator of a vehicle power plant, general view.

The radiator consists of a neck 1, which is closed by a stopper with a steam-air valve (not shown), left 3 and right 4 tanks mounted on the respective sides of the tubular core 9, which are mounted on the frame 6. The left 3 tank contains a shaft 2 on which the piston 5 is placed with a built-in thermostat 10. Rod 2 is mounted rigidly in the body of the left 3 tank, hydraulically connected to the inlet pipe 7, and through the tubular core 9 - with the right 4 tank, output pipe 8 and filler neck 1.

The radiator can be operated in four modes: initial, idle, operational and maximum, at which it operates as follows.

In the initial mode, with the idle circulation pump of the power plant (not shown), the coolant does not enter the inlet pipe 7. The piston 5, under the action of its mass, is located in the lower part of the rod 5 of the left 3 tank. Thermostat 10 is closed. Coolant fills the entire hydraulic path of the radiator, but does not circulate in it.

When the circulation pump of the power plant cooling system is operating in idle mode (minimum shaft speed), coolant is supplied to the inlet pipe 7 and piston 5, while the pressure of the coolant on the piston 5 is minimal. The piston 5 rises to the minimum height along the rod 2, allowing fluid to flow from the inlet pipe 7 through the lower row of the tubular core 9. Pump performance and heat transfer from the power plant to the coolant in this mode are minimal [4], and the thermal efficiency of the lower row of radiator tubes will be maximum. With prolonged operation in that mode and heating the coolant above the operating temperature, the thermostat 10 opens and the liquid enters the supra-piston region of the left 3 tank, passes through the upper rows of the tubular core 9, being cooled in them, then passes through the right tank 4 and the outlet pipe 8 and returns in the cooling system of the power plant. After which the thermostat 10 closes and the radiator operation cycle in this mode is repeated.

When the circulation pump of the cooling system of the power plant is in operation, the piston 5 can occupy an intermediate position on the rod 2 between the upper and lower ends of the left 3 of the tank, while its position on the rod 2 will also depend on the pressure of the coolant, which is proportional to the frequency of rotation of the power shaft installation [3, p.133]. The fluid entering the inlet pipe 7 flows only through the rows of the tubular section 9 located under its piston area.

The liquid located above the piston 5 is extruded by the piston 5 through the idle rows of the tubular section 9.

The amount of heat given off by the power plant to the coolant is also proportional to the rotational speed of the power plant shaft [4, p.140], which makes it possible to provide a rational load on the radiator with a fixed mode of operation of the power plant. The liquid will be in the range of operating temperatures, that is, it will not be supercooled and overheated, that is, effective heat transfer will be ensured. During long-term operation of the power plant at a certain frequency of the shaft, the piston 5 will occupy a fixed intermediate position on the rod 2 and in case of overheating of the liquid, the thermostat 10 will open and the liquid will enter the supra-piston area of the left tank 3. After that, the thermostat 10 closes and the radiator operation cycle is repeated in this mode .

When the circulation pump of the cooling system of the power plant is operating in maximum mode, piston 5 will occupy the upper position at the upper end of the left 3 tank. Pump performance and heat transfer from the power plant to the coolant in this mode will be maximum and the thermal efficiency of the radiator will also be maximum, since all rows of the tubular section 9 will be involved in the operation of the radiator.

Thus, the thermal efficiency of the radiator increased due to its integral performance proportional to the number of rows of the tubular section 9 when used in various operating modes due to the proportional movement of the piston 5 to the pressure of the liquid and its passage in a fixed mode through the thermostat 10.

With the integrated performance of the radiator, a certain (rational) number of rows of the tubular core 9, and not the entire cooling surface of the radiator (like the prototype), is involved in its work, which ensures more efficient heat transfer at ambient temperatures below + 45 ° C and especially in the cold season .

Information sources

1. Ivanov A.M., Solntsev A.N., Gaevsky V.V. And other Fundamentals of the design of the car .: - M. LLC Book Publishing House "Behind the Wheel", 2005. - 336 p.

2. Burkov VV, Indeykin A.I. Autotractor radiators. - L .: Engineering, 1978. - 216 p.

3. Wozniuk V.S. Hydraulics and hydraulic machines. M .: Military Publishing, 1979. - 168 p.

4. Kolchin A.I., Demidov V.P. Calculation of automobile and tractor engines. - M .: Higher school, 2002 .-- 496 p.

Claims (1)

A radiator of a power plant cooling system comprising a filler neck, a left and a right tank, a tubular core, an inlet and an outlet pipe mounted on a frame, characterized in that it is additionally equipped with a piston, a thermostat and a guide rod located in the left tank, and the thermostat is mounted in the piston with which they are located on a guide rod mounted rigidly in the housing of the left tank, hydraulically connected to the inlet pipe, and through the tubular core with the right tank, output throat and filler neck.

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