JP3347082B2 - Plate valve testing device with silencer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test apparatus for a plate valve used for an intake / exhaust port of an internal combustion engine or the like, and more particularly, to a test apparatus for a plate valve provided with a silencer.

[0002]

2. Description of the Related Art A plate-shaped valve called a reed valve is used for an intake / exhaust port of an internal combustion engine. FIGS. 4A and 4B show an example of a plate-like valve, wherein FIG. 4A is an external view and FIG. As shown in (B), a window 1b is provided in a frame 1a having a mountain-shaped cross section, and a valve plate 1c made of a leaf spring or the like is fixedly provided on one side so as to cover the window 1b. When the inner pressure Pi becomes greater than the outer pressure Po, the valve plate 1
c opens and gas flows from the inside to the outside as shown by the arrow,
When the inner pressure Pi becomes smaller than the outer pressure Po, the valve plate 1c closes and no gas flows. That is, it functions as a check valve.

In the case of a high-speed rotation engine, 12000 rpm
Since the plate-shaped valve is operated at a rotational speed of about m, the plate valve opens and closes accordingly. The test apparatus shown in FIG. 5 has been used as a test apparatus for such a high-speed plate-like valve. An inlet 31 and an outlet 32 are provided in the cylinder 30, and each of the ports 31, 3
Attach the plate-shaped valve 1 in the direction shown in FIG. Piston 33
Is reciprocated at high speed by the crank device 34.

[0004]

However, in such a test apparatus, since the air is exhausted and exhausted at a high speed, the noise is loud, which has been a problem. Moreover, this test device cannot pressurize the plate-like valve at high pressure when the engine explodes and burns, and cannot reproduce the state of being mounted on the engine. For this reason, there is a demand for a test device capable of applying a high pressure to the plate-shaped valve when the engine explodes and burns, and the noise of such a device is expected to be further increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a plate-shaped valve test apparatus provided with a silencer that reproduces a state of being attached to an engine as much as possible and has low noise. .

[0006]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a body having a cylindrical through hole, a plate-shaped valve installation space communicating with the through hole, and a fitting in the through hole. A fixed cylinder having a first conduction hole and a second conduction hole for conducting the interior of the cylinder and the plate-shaped valve installation space, and a cylinder rotatably fitted to the fixed cylinder; A plate-shaped valve testing device, comprising: a rotary cylinder having an inlet flow path communicating with the first conductive hole and an outlet flow path communicating with the second conductive hole to the other end. A blower fixed to the end face on the outlet flow path side and blowing air in the radial direction, and a lid provided on the end face of the blower.

[0007] A plate-like valve is mounted in the plate-like valve installation space,
This plate-like valve has a pressure somewhat higher than the atmospheric pressure, for example, 0.0
It is assumed that low-pressure air of 5 MPa is supplied, and high-pressure air of an explosion combustion pressure of the engine, for example, 0.25 to 0.7 MPa is supplied to the inlet passage. The rotating cylinder rotates at high speed according to the rotation speed of the engine. The operation in such a state will be described. During a period in which the first conduction hole and the inlet flow path are in communication, the plate-shaped valve installation space is filled with high-pressure air, and the plate-shaped valve is closed. Next, when the conduction between the first conduction hole and the inlet flow path is lost, and the conduction between the second conduction hole and the outlet flow path are conducted, the pressure in the plate-shaped valve installation space rapidly decreases, and finally the low pressure supplied to the plate-shaped valve is reduced. Lower than air pressure. Then, the plate-shaped valve is opened, and low-pressure air passes through the plate-shaped valve, passes through the outlet flow path, hits the lid, and suppresses noise. Exhaust that has hit the lid is exhausted radially by the blower, and this exhaust function can reduce exhaust resistance. When conduction between the second conduction hole and the outlet flow path is lost, the pressure in the plate-like valve installation space becomes low-pressure air pressure, and the plate-like valve is closed. As a result, a high pressure corresponding to the explosion combustion pressure of the engine is applied to the plate-shaped valve, so that it is possible to simulate a state in which the engine is equipped, and to reduce noise.

[0008] In the invention of claim 2, a muffling box for introducing and blowing out the air supply of the blower is provided.

The noise can be further reduced by not discharging the air directly from the blower to the atmosphere but passing it through the silencer box and then discharging it to the atmosphere.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a configuration of a plate-shaped valve test apparatus according to the present embodiment, FIG. 2 is a cross-sectional view of FIG. 1, (A) is an XX cross-sectional view, and (B) is a YY cross-sectional view. Figure,
(C) is a ZZ arrow view. 1 is a plate-shaped valve to be tested. Reference numeral 2 denotes a main body constituting the test apparatus. A rectangular through-hole 6 is provided in a rectangular parallelepiped, and a plate-shaped valve installation space 7 is formed in the upper part of the rectangular parallelepiped to communicate with the through-hole 6. An intake port 9 for guiding low-pressure air (for example, 0.05 MPa) is provided. Reference numeral 3 denotes a first fixed cylinder which is fitted to a depth almost half of the through hole 6, a high-pressure air intake 10 is provided at an end thereof, and the first fixed cylinder is located at a position in contact with the plate-shaped valve installation space 7 of the cylindrical portion. A conduction hole 11 is provided. 4 is the second
The fixed cylinder is fitted into the remaining half of the depth of the through hole 6, and a second conduction hole 12 is provided at a position in contact with the plate-shaped valve installation space 7 of the cylindrical portion. In addition, the first or second fixed cylinders 3 and 4 can rotate. Rotation is performed manually.

A rotating cylinder 5 is fitted on the inner surfaces of the first and second fixed cylinders 3 and 4 so as to be rotatable at a high speed. On the first fixed cylinder side of the rotary cylinder 5, there is provided an inlet passage 13 that communicates with the high-pressure air inlet 10 and the first communication hole 11.
As shown in FIGS. 1 and 2A, this flow path is composed of an axial flow path and a cross-shaped flow path connected thereto. Further, an outlet flow path 14 that is in communication with the second conduction hole 12 is provided in a portion of the rotary cylinder 5 that is fitted to the second fixed cylinder 4. This portion is a hollow cylinder, the end face of which is on the first fixed cylinder side is closed, and four conduction holes 5 a are provided at 90 ° intervals on a circumferential surface in contact with the second conduction hole 12. The second of the rotating cylinder 5
A timing belt ring 15 is attached to the outer periphery of a portion protruding outside from the fixed cylinder 4, and rotates at high speed by a timing belt (not shown). Further, a blower 20 for discharging air in the radial direction is attached to an end face of the rotary cylinder 5 and rotates integrally with the rotary cylinder 5. Further, a lid 21 is attached to the end face of the blower 20, and exhaust gas discharged from the outlet flow path 14 is applied to suppress noise. Exhaust air is blower 20
, Exhaust resistance can be reduced.

The rotary cylinder 5 is rotatably supported by bearings 16 provided on the first fixed cylinder 3 and the second fixed cylinder 4 so as to be able to rotate at high speed. An O-ring 17 is provided on the sliding surface between the first fixed cylinder 3 and the second fixed cylinder 4 to prevent air leakage. The O-ring 17 is also provided between the flange 3a of the first fixed cylinder 3 and the main body 2 and between the flange 4a of the second fixed cylinder 4 and the main body 2.

Next, the operation will be described. As an example, low-pressure air of 0.05 MPa is supplied to the intake port 9, high-pressure air of 0.25 MPa is supplied to the high-pressure air intake port 10,
It is assumed that the rotating cylinder 5 is rotating at a speed corresponding to the speed of the engine to be simulated. First inlet hole 11 and inlet channel 1
When 3 conducts, the plate-shaped valve installation space 7 has a high pressure simulating explosive combustion, and the plate-shaped valve 1 is closed. Next, when this conduction is completed and the second conduction hole 12 and the outlet flow path 14 are conducted,
The high-pressure air in the plate-shaped valve installation space 7 passes through the outlet flow path 14,
The noise is suppressed by hitting the lid 21, the exhaust resistance is reduced by the blower 20, and the air is exhausted to the atmosphere. During this time, the pressure in the plate-shaped valve installation space 7 rapidly decreases, and when it decreases to 0.05 MPa or less, the plate-shaped valve 1 is opened and low-pressure air flows in. When the conduction between the second conduction hole 12 and the outlet channel 14 ends,
One cycle is completed, and a second cycle in which the first introduction hole 11 and the inlet channel 13 are conducted is started. In the case of this embodiment, when the rotary cylinder 5 makes one rotation, the four-cycle plate-shaped valve 1
Therefore, when simulating an engine of 12000 rpm, the rotating cylinder 5 may be rotated at 3000 rpm.

FIG. 3 shows another embodiment. In this embodiment, a sound deadening box 22 is provided to cover the blower 20 in the apparatus shown in FIG. Muffling box 22
This is a box with a baffle plate inside, and a sound absorbing material is stretched on the surface that comes into contact with air. This can further reduce noise.

[0015]

As is clear from the above description, the present invention provides a cylindrical through hole and a plate-like valve installation space in a main body, a fixed cylinder is fitted into the cylindrical through hole, and the inside of the fixed cylinder is further improved. A rotating cylinder is rotatably fitted to the cylinder, high-pressure air is introduced from one end of the fixed cylinder, low-pressure air is introduced through a plate-like valve, exhausted from the rotating cylinder, and a state in which the plate-like valve is mounted on the engine is simulated. By providing a blower at the outlet end of the rotary cylinder and providing a lid on the end face of the blower, noise can be suppressed and exhaust resistance can be reduced. Further, by providing a muffling box so as to cover the blower, noise can be further suppressed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a plate-shaped valve testing device provided with a sound deadening device of the present embodiment.

2A is a cross-sectional view of FIG. 1, and FIG.
(B) is a YY sectional view, and (C) is a ZZ arrow view.

FIG. 3 is a diagram showing another embodiment of the present invention.

4A and 4B show a configuration of a plate-like valve, wherein FIG. 4A is an external view and FIG.

FIG. 5 is a diagram showing a configuration of a conventional plate valve testing device.

[Explanation of symbols]

 Reference Signs List 1 plate-shaped valve 2 main body 3 first fixed cylinder 3a flange 4 second fixed cylinder 4a flange 5 rotating cylinder 5a conduction hole 6 through hole 7 plate-shaped valve installation space 9 intake port 10 high-pressure air intake 11 first conduction hole 12th 2 conduction hole 13 inlet channel 14 outlet channel 15 ring for timing belt 16 bearing 17 O-ring 20 blower 21 lid 22 muffler box

Claims (2)

(57) [Claims] 1. A main body having a cylindrical through hole, a plate-shaped valve installation space communicating with the through hole, and a hollow cylinder fitted into the through hole, the inside of the cylinder and the plate-shaped valve installation space being connected to each other. A fixed cylinder having a first conduction hole and a second conduction hole for conducting, a cylinder rotatably fitted to the fixed cylinder, an inlet flow path communicating from one end to the first conduction hole, and the second conduction hole A rotary cylinder having an outlet flow path that communicates with the other end, and a plate-shaped valve testing apparatus, comprising: a blower fixed to an end face of the rotary cylinder on the outlet flow path side and blowing air in a radial direction; A plate-like valve testing device provided with a silencer, comprising: a lid provided on an end face of a blower. 2. A plate-shaped valve testing apparatus equipped with a muffler according to claim 1, further comprising a muffling box for introducing and blowing out air from the blower.