JPH04109495U - Dynamic air pressure generator - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention is capable of generating pressurization, depressurization, or an intermediate pressure from its output port using a single blower having an air outlet and a suction port. It is an object of the present invention to provide a dynamic air pressure generator that can minimize the number of on-off valves and simplify the structure of the flow path and the interlocking opening/closing mechanism of the on-off valves. [Structure] Therefore, the pressure passage and pressure reduction passage connected to the outlet and suction port of one blower are merged in a V-shape and connected to the pressure regulating tank, and a switching valve installed at the junction and a pressure reduction passage are connected to the pressure regulating tank. The exhaust valve at the exhaust port branched into the pressure path and the intake valve at the intake port branched into the pressure reduction path are connected so that when the pressure reduction path side of the switching valve is closed, the exhaust valve closes, the intake valve opens, and the switching valve is closed. When the pressure path side is closed, the exhaust valve is opened and the intake valve is closed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a dynamic wind pressure generator, and more specifically, it is used in a dynamic wind pressure environment test equipment. The present invention relates to a dynamic air pressure generator capable of adjusting pressure over a wide range.

0002

[Conventional technology]

The conventional dynamic air pressure generator uses two blowers 101 and 102 as shown in Figure 8(a). An on-off valve 105 is provided in the pressurizing path 104 connected to the outlet 103 of the blower 101, and on the other hand, An on-off valve 108 is provided in the pressure reducing path 107 connected to the suction port 106 of the blower 102, and both pressurizing paths 10 4 and the decompression path 107 to form a connecting path 109 leading to the test object. The flow rate supplied from the wind fan 101 through the pressurizing path 104 is adjusted by the on-off valve 105. , the flow rate exhausted from the blower 102 through the pressure reducing path 106 is linked to the on-off valve 105. It is adjusted by an on-off valve 108.

0003 Therefore, as shown in FIG. 8(b), some systems use a single blower 110. Immediately A pressurizing passage 112 connected to the air outlet 111 of the blower 110 and a depressurizing passage connected to the suction opening 113 The passage 114 is merged to form a connecting passage 115, and the pressure passage 112 and the pressure reduction passage 114 are each opened. In addition to providing closing valves 116 and 117, the exhaust gas when these valves are closed is Alternatively, for intake, an exhaust path 118 and an intake path 119 are branched on the front side of the on-off valve. An exhaust valve 120 and an intake valve 121 are provided respectively, and the on-off valve 11 is provided with an exhaust valve 120 and an intake valve 121. 6, 117, the opening and closing of the exhaust valve 120 and the intake valve 121 are linked.

0004 However, the former structure requires two blowers, which can result in high costs. It is unavoidable. In addition, the latter structure requires at least four valves such as on-off valves; As the interlocking opening/closing mechanism becomes more complex, the number of parts increases, and the flow path becomes more complex. Therefore, there was a problem that the conductance deteriorated.

[0005]

[Problem that the idea aims to solve] In view of the above-mentioned situation, this invention aims to solve the problem by having an air outlet and an inlet. Use a single blower to generate pressurized, depressurized, or intermediate pressure from its output outlet. In addition to minimizing the number of on-off valves, the structure of the flow path And to provide a dynamic air pressure generator capable of simplifying the interlocking opening/closing mechanism of the opening/closing valve. At the point.

[0006]

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a blower having an air outlet and a suction port, and The pressure passage connected to the air outlet and the pressure reduction passage connected to the suction port merge to form a pressure regulating tank. Continuously connect the output port to the pressure regulating tank, the exhaust port to the pressure path, and the intake port to the pressure reduction path. The opening amount to the pressure regulating tank can be reciprocally increased or decreased at the confluence of the pressurization path and depressurization path. In addition to providing a switching valve for the When the pressure reducing side of the switching valve is closed, the exhaust valve is closed, the intake valve is open, and the switching valve is not applied. The pressure created by interlocking each valve so that when the pressure path side is closed, the exhaust valve opens and the intake valve closes. A dynamic air pressure generator was constructed which consisted of a control chamber.

[0007] In addition, as the switching valve, the end of the converging wall of the pressure passage and the pressure reduction passage is used as the center of rotation, and the tip A switching valve was used that was able to move between the outer wall of the pressure reducing path and the outer wall of the pressurizing path.

[0008] The switching valve, the exhaust valve, and the intake valve are fixed to their rotating shafts by a clamp. The blocks were linked to each other with transmission rods to make them work together.

[0009]

[Effect]

In the dynamic wind pressure generator of the present invention, which has the above-mentioned contents, first, the switching valve is connected to the pressurized road side. With the exhaust valve closed and the intake valve open, set the depressurization side to closed. The air blown out from the blower outlet passes through the pressure path of the pressure adjustment chamber and is regulated. It is fed under pressure to a pressure tank, where it stays and pressurized, and the test object is loaded from its output port. Pressurized air is supplied to the airtight test chamber where the The air from the chamber is exhausted, but since the intake valve is open, outside air is not allowed to enter through the intake port. It is sucked in and supplied to the blower.

0010 Also, set the switching valve to close the pressurizing road side and open the pressure reducing road side, and open the exhaust valve. When the intake valve is closed, the pressure of the air blown out from the blower outlet is adjusted. The pressure is sent to the pressure regulating tank through the chamber's pressurizing path, but the flow path is blocked by a switching valve. Since it is closed and the exhaust valve is open, all the air is exhausted to the outside through the exhaust port. On the other hand, the pressure reducing path is opened by the switching valve and the intake valve at the intake port is closed, so the pressure regulating valve is closed. The air in the tank passes through the pressure reducing path and is exhausted from the blower inlet, thus leaving the pressure regulating tank. The pressure inside the tank is reduced, and air flows into the pressure regulating tank from the output port, making it airtight. This reduces the pressure within the laboratory.

[0011] On the other hand, if the opening/closing state of each valve mentioned above is set to an intermediate state, that is, switching The pressure path side of the valve is open, but at the same time, the pressure reduction path side opens slightly from the fully closed state, and also Open the exhaust valve slightly from the fully closed state, and close the intake valve slightly from the fully open state. When the blower is set to the same position, the air blown out from the blower outlet is It is fed under pressure from the pressure path of the bar to the pressure regulating tank, but some of it is fed through the slightly open exhaust valve. The air that is exhausted to the outside through the exhaust port, while the air that is exhausted from the blower suction port, is Inhalation is taken from the intake port through the intake valve that is fully open, and the intake valve is reduced through the partially opened switching valve. Air passes through the pressure path side, air from the pressure regulating tank is exhausted through the pressure reduction path, and air is exhausted from the pressure path. The pressure inside the pressure regulating tank is determined by the balance between the amount being pumped and the amount exhausted from the pressure reducing path. Power is determined. Therefore, the pressure can be regulated by adjusting the opening/closing status of each of these valves. The pressure inside the tank is set appropriately.

0012 In addition, the end of the converging wall of the pressure path and the pressure reduction path is the center of rotation, and the tip is connected to the outer wall of the pressure reduction path. A switching valve that can be moved between the outer walls of the pressure path is used, so one switching valve can be used to move between the pressure path sides. It is possible to set the opening/closing of the decompression path side and the opening/closing of the decompression path side to mutually contradictory states at the same time. Become.

[0013]

【Example】 Next, the present invention will be further explained in detail based on the embodiments shown in the accompanying drawings. 1 and 2 show typical embodiments of the present invention, in which A is a blower and B is a pressure regulator. Each nodal chamber is shown.

[0014] The blower A has an impeller 2 inside that is rotated by a motor 1. An air outlet 3 is provided in the tangential direction of the impeller 2, and an inlet is provided on the side of the rotation axis of the impeller 4, and the rotation of the impeller 2 opens the suction port 4. Air is taken in from the outlet 3 and dynamic air pressure is generated from the outlet 3. Furthermore, the above-mentioned suction A duct 5 is connected to the inlet 4, whereby a duct opening 6 of the duct 5 and the outlet 3 are adjacent to each other and are set to be on substantially the same plane, and in this example, the air outlet 3 and the duct opening 6 are arranged horizontally. Here, even if the rotation speed of the impeller 2 is constant, the suction port 4 If the amount of air taken in from the outlet 3 decreases, the amount and pressure of air blown out from the outlet 3 will decrease. Power also decreases.

[0015] The pressure adjustment chamber B is a duct connected to the air outlet 3 and suction port 4 of the blower A. Connected to the duct port 6, pressurized by the air blown out from the air outlet 3 and exhausted from the duct port 6 The desired dynamic air pressure can be generated by balancing the reduced pressure caused by the air. It is. Then, completely block the exhaust of air blown out from the air outlet 3, and Maximum pressure is generated when sufficient external air is taken in from outlet 6, and The blown air is completely released to the outside, and the air exhausted from the duct port 6 is controlled by the pressure adjustment channel. The minimum pressure occurs when confined within chamber B. In this invention, the pressure The most important structural requirements are the structure and mechanism for adjusting the

[0016] To be more specific, the pressure adjustment chamber B includes a valve connected to the air outlet 3. and a depressurization path 8 connected to the duct port 6 which is continuous with the suction port 4. Both have a pressure regulating tank 9 to which the pressurizing path 7 and the depressurizing path 8 merge and connect, and furthermore, The pressure adjustment tank 9 has an output port 10, the pressure path 7 has an exhaust port 11, and the pressure reduction path 8 has an intake port 12. An opening for the pressure regulating tank 9 is provided at the confluence 13 of the pressure passage 7 and the pressure reduction passage 8. In addition to providing a switching valve 14 that increases and decreases the amount reciprocally, exhaust valves are provided at the exhaust port 11 and the intake port 12. 15 and an intake valve 16 are respectively provided, and the pressure reducing path 8 side of the switching valve 14 is closed (the pressurizing path 7 side is completely closed). When the valve is open), the exhaust valve 15 is closed and the intake valve 16 is fully open. When the pressure passage 7 side of the exchange valve 14 is closed (the pressure reduction passage 8 side is fully open), the exhaust valve 15 is fully open, and the intake valve 16 is fully open. Each valve is linked so that the valve is closed. Here, fully opening the valve means setting it in advance. is the maximum open state within the specified range, closed means completely closed, and open means completely closed. This includes the opening of some parts.

[0017] More specifically, the pressure passage 7 and the pressure reduction passage 8 are designed to improve the conductance of the flow passages. They are arranged in a V-shape in plan view, and at the merging part 13, they are connected to each other by a single merging wall 17. The rotating shaft 18 of the switching valve 14 is arranged close to the end of the merging wall 17. The tip of the valve body 19 fixed to the rotation shaft 18 is connected between the outer wall 20 of the pressure reducing path 8 and the outer wall 21 of the pressurizing path 7. It is not movable, and the rotation range is set to approximately 90 degrees. In addition, it is fixed to the rotation shaft 18. An airtight sliding piece 22 is attached to the proximal edge of the valve body 19, which has been fixed in place. It is in close contact with the receiving member 23 having a cylindrical inner surface fixed to the end of the merging wall 17, and this part is always Maintaining airtightness. Also, the tip of the valve body 19 is also attached to the inner surfaces of the outer walls 20 and 21. The pressure reducing path 8 side or the pressurizing path 7 side can be tightly sealed.

[0018] In addition, the tip of the switching valve 14 is closer to the outlet 3 and the duct opening than the outer walls 20 and 21, which are in close contact with each other. 6 side, the exhaust port 11 is branched and provided on the side of the pressurizing path 7, and the same An intake port 12 is provided in a branched manner on the side of the pressure reduction path 8. And the exhaust port 11 and the intake Inside the port 12, an exhaust valve 15 and an intake valve 16 are provided as described above. The exhaust valve 15 and intake The respective rotation shafts 24 and 25 of the valve 16 are positioned approximately in a straight line with the rotation shaft 18 of the switching valve 14. ing. Additionally, a wire mesh 26 is provided at the exhaust port 11 and the intake port 12 to prevent foreign matter from entering. It is provided.

[0019] The pressure adjustment chamber B passes through the center of the merging wall 17, the rotation shaft 18, and the output port 10. It is formed approximately symmetrically with respect to a vertical plane and is fixed to a dedicated pedestal 27. Also, the above The rotation shaft 18 passes through the pressure adjustment chamber B above and below, and its lower end is connected to the chamber B. It is connected to a fixed servo motor 28 and can rotate the valve body 19 of the switching valve 14 by a predetermined angle. I'm trying to do that. A crank 29 is fixed to the upper end of the rotation shaft 18. As shown in Fig. 3, transmission rods 30 and 31 whose lengths can be adjusted are pivotally attached to the free ends of the The other end of each transmission rod 30, 31 is connected to the protruding end of the rotation shaft 24 of the exhaust valve 15 and the rotation of the intake valve 16. It is pivotally connected to cranks 32 and 33 fixed to the protruding ends of the shaft 25, respectively. Here, the said A pointer 34 is provided protruding from the base end of the crank 29, and a scale plate 35 is fixed to the upper surface of the chamber. This makes it possible to visually check the open/closed status of each valve.

[0020] In addition, a potentiometer 36 is attached to the upper end of the rotating shaft 18, and the rotation angle of the rotating shaft 18 is The angle of rotation is controlled by converting the angle into an electrical signal and inputting it to a control circuit (not shown). There is. Furthermore, a proximity switch 37 is installed near the crank 29 to prevent the crank 29 from turning. Monitor end position to prevent excessive rotation.

[0021] Next, the settings of each valve and the air flow will be described. The switching valve 14 is connected to the pressure reducing path 8 The valve body 19 of the switching valve 14 can be moved between the outer wall 20 of the switching valve 14 and the outer wall 21 of the pressure passage 7. When the pressure reducing path 8 side is closed (the pressurizing path 7 side is fully open), the exhaust valve 15 is closed and the intake valve 16 is fully open, and also remove the valve body 19 of the switching valve 14. When the pressure passage 7 side is closed (the decompression passage 8 side is fully open) in close contact with the wall 21, the exhaust Set so that the air valve 15 is fully open and the intake valve 16 is closed. And the switching valve 14 is inside it. When the valve rotates in between, the exhaust valve 15 and the intake valve 16 rotate in conjunction with each other depending on the rotation angle. That's what I do. Here, by changing the lengths of the transmission rods 30 and 31, the exhaust valve The opening and closing states of intake valve 15 and intake valve 16 can be slightly shifted or finely adjusted.

[0022] Here, the blower A and the pressure adjustment chamber B are arranged as shown in FIGS. 4 and 5. It is installed on a cart 38 that can be moved and shucked up, and its output port 10 is equipped with a bellows. The chamber 39 is connected via a venturi tube 40 to an airtight test chamber C in which the test object is mounted. There is.

[0023] Therefore, first, the switching valve 14 is set to fully open the pressure passage 7 side and close the pressure reduction passage 8 side. When the exhaust valve 15 is closed and the intake valve 16 is fully opened, the air flows from the air outlet 3 of the blower A. The entire amount of the blown air passes through the pressurizing path 7 of the pressure regulating chamber B and enters the pressure regulating tank. 9, stays there and pressurizes it, and attaches the test object from its output port 10. Pressurized air is supplied to the airtight test chamber C to increase its internal pressure, while the suction port 4 of the blower A is The air in the pressure adjustment chamber B is exhausted from the air, but the intake valve 16 is open. Therefore, outside air is sucked in through the intake port 12 and supplied to the blower A. to this setting Therefore, the highest dynamic wind pressure can be applied to the test object.

[0024] In addition, the switching valve 14 is set to close the pressure path 7 side and fully open the pressure reduction path 8 side, and When the air valve 15 is fully open and the intake valve 16 is closed, air is blown from the air outlet 3 of the blower A. The air is sent under pressure to the pressure regulation tank 9 side through the pressure passage 7 of the pressure regulation chamber B. However, since the flow path is closed by the switching valve 14 and the exhaust valve 15 is opened, the exhaust port 11 and exhaust to the outside, and on the other hand, the switching valve 14 opens the pressure reduction path 8 side, and the intake port Since the intake valve 16 of No. 2 is closed, the air in the pressure regulating tank 9 passes through the pressure reducing path 8. The air is exhausted from the suction port 4 of the blower A, and the pressure inside the pressure regulating tank 9 is therefore reduced. As a result, air flows into the pressure regulating tank 9 from the output port 10, and the pressure in the airtight test chamber C is increased. It reduces it.

[0025] On the other hand, if the open/close state of each valve mentioned above is set to an intermediate state, The pressure passage 7 side of the replacement valve 14 is open, but at the same time, the pressure reduction passage 8 side is slightly opened from the completely closed state. Also, the exhaust valve 15 is slightly opened from the fully closed state, and the intake valve 16 is completely opened. When the air blower A is set to a slightly closed state, the air blown out from the outlet 3 of the blower A is , is fed under pressure from the pressure path 7 of the pressure adjustment chamber B to the pressure adjustment tank 9, but a part of it is is exhausted to the outside through the exhaust port 11 from the slightly open exhaust valve 15, while the suction of the blower A The air exhausted from the inlet 4 passes through the widely opened intake valve 16 and is sucked in from the intake port 12. At the same time, air flows from the pressure regulating tank 9 through the pressure reducing path 8 side of the partially opened switching valve 14. is exhausted through the pressure reducing path 8, and the amount of air sent from the pressurizing path 7 and the amount exhausted from the pressure reducing path 8 are The pressure inside the pressure regulating tank 9 becomes lower than the maximum pressure due to the balance with the amount of air being blown. It is determined. Therefore, by adjusting the opening/closing status of each of these valves, the pressure regulating tank can be adjusted. The pressure in the chamber 9 and, by extension, the pressure in the airtight test chamber C are set appropriately.

[0026] Next, another embodiment of the pressure regulating chamber B is shown in FIGS. 6 and 7. Shown in Figure 1 In the relationship between the plate-shaped switching valve 1 and the outer walls 20 and 21, the switching valve 1 is in an intermediate state, that is, a pressure regulating tank. The change in pressure is very small even when you shake it from side to side from the position pointing toward the center of the The pressure changes significantly just before the open or fully closed state. This finely adjusts the pressure However, the present invention can also be implemented as follows. That is, as shown in FIG. Or when it comes into contact with the outer wall 21, it will be in a fully open or fully closed state, and the pressure adjustment in the intermediate state will be It eliminates or narrows the scope of impossibility.

[0027] In addition, the one shown in FIG. 7 uses the same switching valve 1 as the switching valve 1 shown in FIG. , the surfaces of the outer walls 20 and 21 facing the switching valve 1 form an arcuate surface 42 and bulge inward. It is something that Its operation is similar to that of the structure shown in FIG. 6 described above.

[0028] Furthermore, in this embodiment, the switching valve 1, the exhaust valve 15, and the intake valve 16 are linked, but It is also possible to control them independently by computer. In other words, each When opening or closing a valve, the pressure must be increased or decreased rapidly in a short period of time. However, it is possible if each valve is controlled independently.

[0029]

[Effect of the idea]

According to the dynamic air pressure generator of the present invention, which is constructed as described above, the airflow has an outlet and a suction port. A wind fan, a pressurizing path connected to the air outlet, and a depressurizing path connected to the suction port merge. Continuous to the pressure regulation tank, the pressure regulation tank has an output port, the pressure path has an exhaust port, and the pressure reduction path has an output port. Each has an intake port, and the opening amount for the pressure adjustment tank is set at the confluence of the pressure path and pressure reduction path. In addition to installing a switching valve that increases and decreases reciprocally, an exhaust valve and an intake valve are installed at the exhaust port and intake port. When the pressure reducing path side of the switching valve is closed, the exhaust valve closes, the intake valve opens, and Each valve is linked so that when the pressure path side of the switching valve is closed, the exhaust valve opens and the intake valve closes. Since it consists of a pressure adjustment chamber made of A wind fan is used to generate pressurization, depressurization, or an intermediate pressure from its output port. In addition, the number of on-off valves is kept to a minimum of three, and the structure of the flow path and Simplify the interlocking opening/closing mechanism of the opening/closing valve, improve conductance, and reduce the number of parts. It has the remarkable effect of reducing costs by minimizing Ru.

[Brief explanation of drawings]

FIG. 1 is a simplified partial cross-sectional plan view of a dynamic wind pressure generating device of the present invention.

FIG. 2 is also a simplified side view.

FIG. 3 is an enlarged plan view of a portion of the pressure regulating chamber.

FIG. 4 is a plan view of the dynamic air pressure generator of the present invention connected to an airtight test chamber.

FIG. 5 is a side view as well.

FIG. 6 is a cross-sectional view showing another embodiment of the pressure adjustment chamber.

[Fig. 7] A cross-sectional view showing still another embodiment.

FIG. 8 is a simplified diagram showing a conventional example, in which (a) shows an example using two blowers, and (b) shows an example using one blower.

[Explanation of symbols]

A Blower B Pressure adjustment chamber C Airtight test chamber 1 Motor 2 Impeller 3 Air outlet 4 Suction port 5 Duct 6 Duct port 7 Pressure path 8 Pressure reduction path 9 Pressure adjustment tank 10 Output port 11 Exhaust port 12 Intake port 13 Merging section 14 Switching Valve 15 Exhaust valve 16 Intake valve 17 Merging wall 18 Rotating shaft 19 Valve body 20 Outer wall 21 Outer wall 22 Sliding piece 23 Receiving member 24 Rotating shaft 25 Rotating shaft 26 Wire mesh 27 Frame 28 Servo motor 29 Crank 30 Transmission rod 31 Transmission Crank 32 Crank 33 Crank 34 Pointer 35 Dial plate 36 Potentiometer 37 Proximity switch 38 Cart 39 Bellows 40 Venturi tube 41 Arc surface 42 Arc surface

Claims (3)

[Scope of utility model registration request] Claim 1: An air blower having an air outlet and a suction port, a pressurizing path connected to the air outlet and a pressure reducing path connected to the suction port merge and connect to a pressure regulating tank, and the pressure regulating tank includes: The output port and the pressure path have an exhaust port, and the pressure reduction path has an intake port, and a switching valve is provided at the confluence of the pressure path and the pressure reduction path to reciprocally increase or decrease the opening amount to the pressure regulating tank, An exhaust valve and an intake valve are provided at the exhaust port and intake port, respectively. When the pressure reducing path side of the switching valve is closed, the exhaust valve is closed and the intake valve is open. When the switching valve's pressurizing path side is closed, the exhaust valve is closed. A pressure regulating chamber that interlocks each valve so that the intake valve is opened and the intake valve is closed;
A dynamic wind pressure generator characterized by the following. 2. As the switching valve, a switching valve is used whose rotation center is an end of a confluence wall of the pressure-reducing path and the pressure-reducing path, and whose tip is movable between the outer wall of the pressure-reducing path and the outer wall of the pressurizing path. The dynamic wind pressure generating device according to claim 1. 3. The dynamic air pressure generating device according to claim 1, wherein the switching valve, the exhaust valve, and the intake valve are interlocked by linking cranks fixed to their rotating shafts with a transmission rod. .