JP6193729B2 - Wind tunnel equipment - Google Patents

Description

  The present invention relates to a wind tunnel device, and more particularly to a wind tunnel device used in an engine or vehicle test.

  An engine bench is known as an engine test apparatus. The engine bench is a device that evaluates whether a test engine has a predetermined performance. The test engine is mounted on a table, and its output shaft is connected to a dynamometer via a shaft. The engine performance is measured and evaluated by measuring the torque and the rotational speed while absorbing the rotational force of the engine output shaft with the dynamometer.

  In such an engine bench, a wind tunnel device is used for cooling a test engine, a radiator, and the like. The wind tunnel device cools the object to be cooled by blowing air from the blower toward the object to be cooled to bring the surroundings of the object to be cooled into a blowing state. In recent years, it has been desired that a wind tunnel device for an engine bench reproduces the air blowing state when the vehicle is traveling.

  Various proposals have been made for wind tunnel devices so that a desired air volume distribution can be reproduced. For example, in the wind tunnel device disclosed in Patent Document 1, the inside of a casing is divided into a lattice shape, and fans are provided in each lattice space. Can be adjusted. In the wind tunnel device of Patent Document 2, the casing is partitioned into a lattice shape, and an opening / closing valve is provided in each lattice space. The air volume is adjusted. In the wind tunnel device of Patent Document 3, the casing is partitioned in a lattice shape, and a large number of movable blades are provided at the outlet. And the whole air volume distribution is adjusted by operating many movable blades.

Japanese Patent Fair 5-64728 JP-A-11-160195 JP2012-112821

  However, the conventional wind tunnel device has a problem that it is very difficult to accurately form a desired air volume distribution around the object to be cooled. For example, since the wind tunnel device of Patent Document 1 has a fan in each lattice space, unevenness in the air volume distribution has already occurred in each lattice space. For this reason, since the inside of each lattice space cannot be made into desired air volume distribution, it cannot be made into desired air volume distribution as a whole. Furthermore, the wind tunnel device of Patent Document 1 has a problem that it cannot be miniaturized because a fan is provided inside each lattice space, and is not suitable for an engine bench.

  The wind tunnel devices of Patent Document 2 and Patent Document 3 have a problem in that it is difficult to individually adjust the air volume of each lattice space independently, and thus it is impossible to achieve a desired air volume distribution as a whole. For example, if the air volume in one grid space is adjusted by a valve or the like, the air volume in the surrounding grid space will increase or decrease by itself, and the overall air volume distribution will also change. Therefore, the conventional wind tunnel device measures the air volume distribution after opening and closing the valve and the movable vane plate, and measures the air volume distribution by opening and closing the valve and the movable vane plate where the desired air volume distribution is not achieved. Was repeated. For this reason, there is a problem that a great deal of time and labor are required until the entire air flow distribution becomes a desired one.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a wind tunnel device capable of easily creating a desired air volume distribution.

  In order to achieve the above object, the invention according to claim 1 has a blower for blowing air, a chamber for storing air from the blower and having pressure adjusting means, and an end connected to the chamber. A plurality of pipe members, a plurality of valve members provided on the plurality of pipe members, respectively, for adjusting the amount of air flowing through the pipe members, and by controlling the valve members, thereby passing the pipes from the chamber. Control means for controlling the amount of air flowing through the blower, and the air blown from the blower is adjusted in pressure in the chamber, then passes through the plurality of pipe members, and the amount of air is adjusted by the valve member. Provided is a wind tunnel device that is blown.

  According to the present invention, after the air from the blower is adjusted to a constant pressure in the chamber, the air volume is adjusted to be divided into a plurality of pipe members and the air is blown. Stable supply with air volume. Therefore, a desired air volume distribution can be easily created.

  A second aspect of the present invention includes a lattice unit in which a plurality of cylindrical lattice spaces are formed by dividing the inside of the cylindrical body into a lattice shape, and the plurality of lattice spaces include The tips of the plurality of pipe members are connected.

  According to the present invention, the air volume is adjusted by the valve member in each pipe and then supplied to each grid space. Therefore, the air supplied to each grid space is directed in one direction inside the grid space. It flows in the rectified state. As a result, air of a constant pressure is blown out from each lattice space in a rectified state, so that a desired air volume distribution can be formed in front of the lattice unit.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a target value of the air volume blown from each lattice space is input to the control means as a control pattern, and according to the control pattern, The plurality of valve members are controlled simultaneously.

  According to the present invention, the air adjusted to a constant pressure by the chamber is divided into a plurality of pipe members and the air volume is adjusted to blow air, so that air of a predetermined pressure is stably supplied at a desired air volume. The desired air volume distribution can be easily created.

Schematic diagram showing the configuration of the wind tunnel device of the present embodiment Front view of lattice unit Explanatory drawing explaining a control pattern

  Hereinafter, preferred embodiments of a wind tunnel device according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a configuration of a wind tunnel device 10 to which the present invention is applied. FIG. 2 is a front view seen from the outlet side of the lattice unit. In the present embodiment, an example of the wind tunnel device 10 for cooling the radiator 11 will be described. However, the cooling target is not limited to the radiator 11 and may be a test engine or the like.

  As shown in FIG. 1, the wind tunnel device 10 mainly includes a lattice unit 12, a tube 14, a chamber 16, and a blower 18. The blower 18 has a blowing port connected to the chamber 16, and air blown from the blower 18 flows into the chamber 16.

  The chamber 16 is formed in a size having a sufficient capacity with respect to the blown air volume of the blower 18 and is provided with a relief valve 22 for pressure adjustment. The interior of the chamber 16 is maintained at a constant pressure by the relief valve 22. Therefore, the air flowing into the chamber 16 from the blower 18 is stored in the chamber 16 and is maintained at a constant pressure.

  A plurality of tubes 14 are connected to the chamber 16. In the example of the present embodiment, the same number of tubes 14 as the lattice spaces 20 described later are provided, and the tips thereof are connected to the lattice spaces 20, respectively. Therefore, the air in the chamber 16 is divided into a plurality of tubes 14 and then supplied to each lattice space 20 of the lattice unit 12.

  The entire lattice unit 12 is formed in a rectangular tube shape, and the inside thereof is divided into a lattice shape by a plurality of parallel vertical plates 30 and a plurality of parallel horizontal plates 32. Thereby, a plurality of lattice spaces 20 as shown in FIG. 2 are formed. The lattice space 20 is formed in a rectangular tube shape, and one side thereof (the radiator 11 side) is opened. Moreover, the front-end | tip of the pipe | tube 14 is connected to the opposite end surface, respectively. The lattice space 20 and the tube 14 are formed with substantially the same size, and when air flows from the tube 14 to the lattice space 20, the air flows without being expanded or compressed.

  By the way, each of the pipes 14 is provided with a valve 24 for adjusting the air volume and a flow meter 26. The valve 24 is a valve that adjusts the flow rate through each pipe 14, and is controlled by the control device 28. On the other hand, the flow meter 26 is a sensor that measures the flow rate of air flowing through each pipe 14, and outputs a signal indicating a measured value to the control device 28. The control device 28 controls the valve 24 in accordance with the measured value, thereby controlling the amount of air flowing through each pipe 14, that is, the amount of air flowing through each lattice space 20.

  The target value of the valve 24 is input to the control device 28 in advance. This target value can be input for each valve 24. Furthermore, the target values of a plurality of valves 24 can be input as a control pattern. For example, a control pattern in which all the valves 24 are controlled to the same opening degree to create a uniform air volume distribution, or the valves 24 corresponding to the central lattice space 20 are controlled to an opening degree smaller than the other to reduce the central air volume. A control pattern can be selected. When these control patterns are selected, the control device 28 simultaneously controls the openings of the plurality of valves. Thereby, the air volume of the lattice space 20 corresponding to the valve is adjusted simultaneously.

  3A and 3B show examples of control patterns. Here, A, B, C... From the top in the vertical direction of FIG. 3 and a, b, c. For example, the second lattice space 20 from the top and the third from the left is the lattice space 20Bc. In FIG. 3, “×” means that the corresponding valve 24 is fully closed, no mark means that it is fully open, and “/” means the other (partially closed state).

  In the control pattern shown in FIG. 3A, the valve 24 corresponding to the lattice space 20Cd is fully closed, and the valves corresponding to the surrounding lattice spaces 20Bc, 20Bd, 20Be, 20Cc, 20Ce, 20Dc, 20Dd, and 20De are arranged. The opening is set to 1/2. This makes it possible to create an air volume distribution in which the air volume at the center is small and the air volume increases as the distance from the periphery increases. Therefore, when the radiator 11 is arranged at the center, it is possible to reproduce a situation where the air volume is large around the radiator 11.

  In the control pattern shown in FIG. 3B, the valve 24 corresponding to the lattice spaces 20Dd and 20Ed in the lower center has an opening of 1/3, and the upper lattice spaces 20Aa, 20Ab, 20Ac, 20Ae, 20Af, and 20Ag The corresponding valve 24 has an opening of 1/3. Thereby, the air volume of the center lower part and the upper part becomes small. Therefore, it is possible to reproduce the situation when there is a shield at this position.

  The valve control pattern is not limited to the above-described example, and various measures such as a pattern in which the air volume is increased only on the right side or the left side, and a pattern in which only a part of the air volume is decreased are possible. As a result, it is possible to reproduce a case where only a part of the radiator 11 is exposed to a large amount of air or, conversely, a state where it is difficult for the part of the radiator 11 to hit air.

  Next, the operation of the wind tunnel device 10 configured as described above will be described. In the above-described wind tunnel device 10, air is supplied to the chamber 16 by driving the blower 18. Since the relief valve 22 is provided in the chamber 16, the inside of the chamber 16 is always maintained at a substantially constant pressure. After the air in the chamber 16 is divided into a plurality of pipes 14, the flow rate is controlled by a valve 24 and flows into each lattice space 20. At that time, since air maintained at a constant pressure flows in the chamber 16, the air flows in a rectified state in one direction in the lattice space 20. Further, since there is no valve member such as the blower 18 or the valve 24 in each lattice space 20, the air in the lattice space 20 is blown out to the outside in its rectified state. Therefore, air in a rectified state is blown out from each lattice space 20 toward the radiator 11. Since the air in the rectified state is blown out from all the lattice spaces 20 in the same direction, the air from the adjacent lattice spaces 20 reaches the radiator 11 without interfering with each other. Therefore, a desired air volume distribution can be formed around the radiator 11.

  In the above-described embodiment, the same number of lattice spaces 20 as the tubes 14 are provided. However, the present invention is not limited to this. For example, a large lattice space 20 is formed, and a plurality of tubes 14 are formed in the lattice space 20. May be connected.

  In addition, the embodiment described above is an example in which the lattice unit 12 is provided, but the present invention is not limited to this, and the tips of the plurality of tubes 14 are arranged in parallel without providing the lattice unit 12. May be. However, the use of the lattice space 12 makes it easier to obtain a rectified state up to the object to be cooled, making it easier to form a desired air volume distribution.

  DESCRIPTION OF SYMBOLS 10 ... Wind tunnel apparatus, 11 ... Radiator, 12 ... Lattice unit, 14 ... Pipe, 16 ... Chamber, 18 ... Blower, 20 ... Lattice space, 22 ... Relief valve, 24 ... Valve, 26 ... Flow meter, 28 ... Control device, 30 ... Vertical partition plate, 32 ... Horizontal partition plate

Claims (3)

A blower that blows air;
A chamber in which air from the blower is stored and pressure adjusting means;
A plurality of pipe members whose ends are connected to the chamber;
A plurality of valve members which are respectively provided on the plurality of pipe members and adjust the air volume of the air flowing through the pipe members;
Control means for controlling the volume of air flowing from the chamber through the pipe by controlling the valve member; and
The air blown by the blower is characterized in that the air blown from the blower is pressure-adjusted in the chamber, passes through the plurality of pipe members, and is blown with the air volume adjusted by the valve member. A lattice unit in which a plurality of cylindrical lattice spaces are formed by dividing the inside of the cylindrical body into a lattice shape,
The wind tunnel device according to claim 1, wherein tips of the plurality of pipe members are connected to the plurality of lattice spaces.   The target value of the air volume blown from each lattice space is input to the control means as a control pattern, and the plurality of valve members are simultaneously controlled according to the control pattern. The wind tunnel device according to 1 or 2.

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