JPS6019949Y2 - rotary oil cooler - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary oil cooler in which a cylinder through which hot oil passes is rotated in a refrigerant to cool the oil.

Conventionally, oil coolers attached to engines have a double-tube heat exchanger installed inside the engine's radiator tank, and high-temperature oil is passed through the heat exchanger, and engine cooling water is supplied from the inside and outside of the double-tube. Many were stationary types that cooled the oil.

However, installing an oil heat exchanger inside a small radiator tank is difficult in terms of design and manufacturing, and it has been difficult to create an oil cooler with sufficient performance.

Furthermore, if the oil cooler is provided outside the radiator, a separate pump will be required to flow the cooling water, which is not economically advisable.

The present invention aims to provide an effective oil cooler that eliminates the drawbacks of conventional oil coolers, and the oil cooler is installed outside the engine radiator, and the refrigerant is controlled by the dynamic pressure of the oil. This is a rotary oil cooler with a novel structure in which fluid is caused by the rotation of the oil cooler itself.

The illustrated embodiment will be described below.

FIG. 1 is a longitudinal sectional side view of a first embodiment of a rotary oil cooler, in which both ends of a rotating cylinder 1 are narrowed to reduce its diameter, a bearing 2 is connected thereto, and an oil inlet is watertightly attached to an outer cylinder 3. It is rotatably fitted into the pipe 4 and outlet pipe 5.

Reference numeral 6 denotes a bearing that connects the outer cylinder 3 and the multi-tubes 4 and 5 in a watertight manner, and also receives thrust by slidingly contacting the bearing 2.

The outer periphery of a spiral blade 7 is fixed to the inner surface of the rotating cylinder 1, and the core 8 is fixed to the inner periphery of the spiral blade 7.

Wing plates 9 are attached to the outer surface of the rotating cylinder 1 in a scattered manner.

The vane plate 9 is provided with an angle of attack so that the rotation of the rotary cylinder 1 causes the coolant in the outer cylinder 3 to flow from the inlet 10 to the outlet 11.

With the above structure, when high-temperature oil pumped by the pump flows into the rotating cylinder 1 from the inlet pipe 4, the oil passes between the inner surface of the cylinder 1 and the core 8 and flows into the outlet pipe 5. During this time, the spiral blade 7 is pushed and the cylinder 1 is
Rotate.

As a result, the vane plate 9 attached to the outer surface of the cylinder 1 and having an angle of attack rotates in the coolant filled between the cylinder 1 and the outer cylinder 3, causing the coolant to flow from the inlet 10 to the outlet 11.

While the rotating cylinder 1 is rotated and the oil flows along the spiral blades 7, the heat of the oil is transmitted to the cylinder 1 and the blade plate 9, and is transferred from the outer surface of the cylinder 1 and the blade plate 9 into the cooling liquid. The oil is cooled and flows out from the outlet pipe 5.

That is, the spiral blades 7 and the blade plates 9 also serve as heat transfer fins.

FIG. 2 shows a second embodiment in which the structure of the bearing part of the rotating cylinder 1 is changed, and the inlet pipe 4 and the outlet pipe 5 are oil-tightly fixed to the rotating cylinder 1 via the bearing 2, and the container pipe 4°5 is rotatably supported by a bearing 6, and oil is supplied to tubes 4 and 5 rotating together with the cylinder 1 via rotary joints 12 and 13.

In the structure of the first embodiment, if oil leaks from the bearing 2, it will mix in the coolant, so consideration must be given to preventing oil leakage, but in the second embodiment, this is not a concern.

The rest of the structure is the same as that of the first embodiment, and the heat exchange function is also the same.

As can be seen from the above embodiment, the oil cooler of the present invention pumps high-temperature oil between the rotating cylinder 1 and the core 8.
The heat of the oil is transmitted to the cylinder 1 and the blade plate 9 by passing through a narrow passage formed between the cylinder 1 and the blade plate 9.
Since the heat transfer efficiency is good and the rotary cylinder 1 is caused to rotate and the coolant is also caused to flow, a coolant circulation pump or a driving power device is not required.

In particular, in the present invention, the spindle-shaped core 8 is held in the center of the rotating cylinder 1 via the spiral blade 7, and both ends of the rotating cylinder 1 are tapered gradually following the shape of the core 8, so that the inlet pipe 4 The oil flowing into the rotating cylinder 1 is guided near the inner surface of the rotating cylinder 1, and as a result, heat transfer through the rotating cylinder wall, that is, cooling is performed well, and the torque for rotating the cylinder 1 is increased. be able to.

This effect changes depending on changes in the engine rotational speed, and as the engine rotational speed increases and the temperature rise of the oil increases, the degree of cooling increases, and oil cooling can always be performed in accordance with the operating conditions of the engine.

In addition, since it is installed separately from the engine radiator, there are fewer restrictions on installation space, size, and shape, and the diameter of the rotating cylinder can be made sufficiently large to increase the heat transfer area.
Efficient cooling can be achieved by freely selecting the size, number, etc. of the spiral blades 7 and blade plates 9.

Although the above embodiment uses a cooling liquid, it is also possible to make the blade plate 9 larger and configure it as an air-cooled type.

In this case, the outer cylinder 3 may be omitted and the rotary cylinder 1 may be rotated in the atmosphere.

Further, the spiral blades 7 and the blade plates 9 can be made continuous or intermittent depending on the situation.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing a first embodiment of the present invention, and FIG. 2 is a longitudinal sectional side view showing a second embodiment. 1: Rotating cylinder, 2: Bearing, 3: Outer cylinder, 4: Inlet pipe, 5:
Outlet pipe, 6: bearing, 7: spiral blade, 8: core, 9: vane plate.

Claims (1)

[Scope of utility model registration request] A spindle-shaped core 8 is attached to the inner surface via a spiral blade 7 and held at the center of the rotating cylinder 1, and oil inlet pipes 4 are provided at both ends of the rotating cylinder 1, both ends of which are tapered to follow the shape of the core 8. A rotary oil cooler comprising an outlet pipe 5 inserted oil-tightly, a rotary cylinder 1 rotatably supported, and a vane plate 9 attached to the outer surface of the cylinder 1 at an angle of attack.