KR100631130B1 - An inhalation and ventilation valve enables suppression of noise of a cylinder type air compressor - Google Patents

Abstract

The present invention has a valve shaft made of a predetermined thickness so that the ringing phenomenon does not occur, and excellent elasticity and airtight packings are installed on the portion where the valve shaft is seated to block fundamental noise generating factors as well as good durability. It relates to a noise reduction device of the intake and exhaust valve for a cylindrical air compressor having.

The present invention includes a body having a plurality of suction holes; A movable shaft that is elastically installed in the body by a coil spring and a stopper so as to be movable up and down through the center of the body and moves up and down; Packing for elastically supporting the contact surface of the movable shaft when the movable shaft is up and down to reduce the impact noise; An intake valve made of an elastic support for elastically supporting the lower end of the stopper; A body having a plurality of exhaust holes; A movable shaft which is elastically installed in the body by a coil spring and a stopper so as to be movable up and down through the center of the body and to open and close the exhaust hole; A packing for resiliently supporting the contact surface during vertical movement of the movable shaft; Characterized in that the exhaust valve made of an elastic support for elastically supporting the impact surface of the inner side of the body when the movable shaft up and down.

 Compressor, valve, movable shaft, noise reduction

Description

Noise reduction and intake / exhaust valve of cylinder type air compressor {AN INHALATION AND VENTILATION VALVE ENABLES SUPPRESSION OF NOISE OF A CYLINDER TYPE AIR COMPRESSOR}

1 is an exploded perspective view showing a conventional intake and exhaust valve for a cylindrical air compressor;

Figure 2a and 2b is a cross-sectional view showing the operating state of the noise reduction device on the intake valve side for the cylindrical air compressor according to the present invention,

3 is an enlarged cross-sectional view showing "A" shown in FIG. 2A;

4a and 4b is a cross-sectional view showing the operating state of the noise reduction device on the exhaust valve side of the cylindrical air compressor according to the present invention;

FIG. 5 is an enlarged cross-sectional view showing "B" shown in FIG. 4A.

* Description of Signs for Main Parts in Drawings *

4: cylinder head 26, 36: holder

100: suction valve 110, 210: body

111, 211: suction hole 113, 213: coupling groove

120, 220: movable shaft 121, 221: sealing part

121a, 221a: adhesion surface 123, 223: stopper

125, 225: Fixing bolt 127, 227: Coil spring

130, 230: packing 131, 231: contact protrusion

140, 240: elastic support 141, 241: groove

143, 243: support protrusion 150, 250: bushing

161: intake passage 200: exhaust valve

215: hitting surface 261: exhaust passage

The present invention relates to a noise reduction intake / exhaust valve of a cylindrical air compressor, and in particular, includes a valve shaft made of a predetermined thickness so as not to ring, and a packing having excellent elasticity and good airtightness at a portion where the valve shaft is seated. The present invention relates to a noise reduction device of an intake / exhaust valve for a cylindrical air compressor having a good durability as well as blocking fundamental noise generation factors by installation.

In general, a reciprocating air compressor is a device that stores compressed air in a storage tank of a constant capacity and, when necessary, enables various operations by using the high pressure storage air.

Such a conventional air compressor has a storage tank for storing compressed air, installs an electric motor and a cylinder block having a pulley installed on one side of the electric motor at an upper end of the storage tank, and transmits the power of the electric motor to the pulley. A belt is provided, and a cylinder head having an intake valve for sucking air and an exhaust valve for discharging compressed air is installed at an upper end of the cylinder block.

The cylinder block has a plurality of pistons (53a, 53b) for intake and exhaust in the interior, as shown in Figure 1, the piston is connected to a crankshaft (not shown), the one side of the crankshaft is connected to the electric pulley The motor receives the power of the motor and rotates.

The conventional air compressor configured as described above transfers the power of the electric motor to the pulley through the belt, and the pulley transfers the power to the crankshaft to move the piston installed inside the cylinder block up and down to move the intake valve (2). As the air is sucked in and compressed and exhausted through the exhaust valve 3, the compressed air is stored in the storage tank through the discharge pipe.

However, in the conventional intake and exhaust valves 2 and 3, a plurality of opening holes 22 are formed in the main body 20, and the valve plates 24 blocking the opening holes 22 are springs 21a and 21b. In the case of the intake valve 2, the valve plate 24 covers the bottom of the opening hole 22, and in the case of the exhaust valve 3, the valve plate (not shown) opens. The upper surface of the ball (not shown) is blocked and then opened by suction force or expansion force in the cylinders 51 and 52 formed by the reciprocating motion of the pistons 53a and 53b, so that air is sucked in and exhausted.

The intake / exhaust valves 2 and 3 are inserted into the cylinder head 4 and fixed through the intake and exhaust side holders 26 and 36 having a plurality of through holes 26a and 36a formed on one side wall.

However, since the valve plate 24 of the conventional suction and exhaust valves 2 and 3 is mostly made of a metal material (stainless steel), blow sound and vibration are generated while being detached from the opening hole 22 during the suction and exhaust of air. The blow sound and vibration generated in this way are transmitted to the intake hole 42 directly through the through hole 26a and transmitted to the outside, thereby causing noise.

In order to solve such a problem, the noise reduction device disclosed in Korean Utility Model Publication No. 359639 replaces the valve plate 24 made of metal material with synthetic resin material, and also slightly changes the structure of the holders 26 and 36. In this case, however, the disk-shaped valve plate 24, which is also thin in thickness, continually flows up and down inside the continuous intake / exhaust valve and strikes the lower surface of the main body 20 on the upper side, and the fixed body 28 on the lower side. Due to its thin thickness, it still acts as a factor that generates noise due to its ringing and hitting sound, and its durability is significantly reduced compared to metal valve plate by adopting the material of valve plate 24 as synthetic resin. There was a problem.

The present invention is to solve the above problems, the object of the present invention is to provide a valve shaft made of a predetermined thickness so that the ringing phenomenon does not occur, by providing a good elasticity and good airtight packing on the seat portion where the valve shaft is seated It is to provide a noise reduction intake and exhaust valve of a cylindrical air compressor having good durability as well as blocking fundamental noise generating factors.

In order to achieve the above object, the present invention is disposed inside the holder inserted into the cylinder block of the air compressor to intake / exhaust the air by driving the cylinder in the cylinder block up and down through the drive motor and the pulley interlocked therewith An intake and exhaust valve of a cylindrical air compressor having a storage tank for storing compressed air, the intake and exhaust valve comprising: a body having a plurality of suction holes inserted into the intake holder and inclined in a central direction from an upper surface to a lower surface; A movable shaft that is elastically installed in the body by a coil spring and a stopper so as to be movable up and down through the center of the body, and is opened and closed to open and close the plurality of intake holes through a sealing part protruding from a lower end thereof; It is coupled to the inside of the lower end of the body, the inner side has an inclination corresponding to the sealing part of the close contact of the movable shaft, and at the same time, it is compressed to the close contact when the valve is closed to maintain the airtight in the cylinder and when the movable shaft moves up and down A packing for elastically supporting the contact surface to reduce the impact noise; The center is penetrated and coupled to the movable shaft while being seated on the upper surface of the body, and supports the lower end of the coil spring, and elastically supports the lower end of the stopper when the movable shaft moves up and down to reduce the hitting noise. An intake valve made of a support; A body having a plurality of exhaust holes inserted into the exhaust holder and formed to be obliquely penetrating from the upper surface to the lower surface in the center direction; A movable shaft that is elastically installed in the body by a coil spring and a stopper so as to be movable up and down through the center of the body, and is configured to open and close the plurality of exhaust holes through a sealing part protruding from the lower end as it moves up and down; It is coupled to the inside of the lower end of the body, the inner side has an inclination corresponding to the sealing part of the close contact of the movable shaft, and at the same time, it is compressed to the close contact when the valve is closed to maintain the airtight in the cylinder and when the movable shaft moves up and down A packing for elastically supporting the contact surface to reduce the impact noise; The inner side of the body is seated on the upper surface of the sealing portion is coupled to the center of the movable shaft and at the same time to support the lower end of the coil spring, when the movable shaft up and down the impact surface inside the body It provides a noise reduction intake and exhaust valve of the cylindrical air compressor, characterized in that composed of an exhaust valve made of an elastic support for elastically supporting to reduce the impact noise.

In this case, the packing is made of one of graphite, viton and fluorine rubber having excellent elasticity, airtightness and durability even at high temperature.

In addition, the packing of the intake / exhaust valve is in close contact with the contact surface of the movable shaft, respectively, and a plurality of contact protrusions having hemispherical or inclined surfaces are formed along the inner circumferential surface to maintain the airtightness of the cylinder.

Furthermore, the elastic support of the intake / exhaust valve forms a plurality of support protrusions along the outer periphery of the top in order to reduce the impact noise with the mating portion.

In addition, as the movable shaft of the intake / exhaust valve is made of metal, it may have improved durability compared to a valve plate made of a conventional synthetic resin.

Therefore, in the present invention described above, the packing and the resilient support body disposed on the intake / exhaust side body, respectively, can significantly reduce the noise generated in the parts hitting each other during the up and down movement of the movable shaft. Durability can be improved.

(Example)

The noise reduction device of the intake / exhaust valve for the cylindrical air compressor according to the present invention will be described in detail with reference to the drawings.

2A and 2B are cross-sectional views showing an operating state of a noise reduction device on the intake valve side of a cylindrical air compressor according to the present invention, and FIG. 3 is an enlarged cross-sectional view showing "A" shown in FIG. 2A, and FIG. 4A and 4B are sectional views showing the operating state of the noise reduction device on the exhaust valve side of the cylindrical air compressor according to the present invention, and FIG. 5 is an enlarged sectional view showing "B" shown in FIG. 4A.

The noise reduction intake and exhaust valve for the cylindrical air compressor according to the present invention has a similar structure to each other, first, the configuration of the intake valve is as follows.

In the intake valve 100 according to the present invention, as shown in FIG. 2A, a body 110 is disposed inside the intake holder 26 inserted into the cylinder head 4, and the body 110 is disposed on an upper surface thereof. A plurality of suction holes 111 are formed to penetrate in the center direction toward the lower surface.

In addition, the stop shaft 123 is coupled to the movable shaft 120 by a fixing bolt 125 at an upper end thereof so as to be movable up and down through the center of the body 110, and the stopper 123 and the body 110. It is elastically coupled to the body 120 by a conical coil spring 127 disposed between.

Furthermore, the movable shaft 120 opens and closes the plurality of intake holes 111 through the sealing part 121 protruding from the lower end when the movable shaft 120 moves up and down for intake.

The coil spring 127 is supported at its lower end by an elastic support 140 through which the center is coupled to the movable shaft 120 while being seated on the upper surface of the body 110. That is, the lower end of the coil spring 127 is inserted into the groove 141 of the elastic support 140.

At this time, the elastic support 140 is formed by a plurality of support protrusions 143 along the upper outer periphery as shown in Figure 3 by hitting the lower end of the stopper 123 when the movable shaft 120 is up and down elastically The noise can be reduced, and the material of the elastic support 140 is preferably made of a rubber material.

In addition, the coupling groove 113 formed inside the lower end of the body 110 has an inclination corresponding to the contact surface 121a of the movable shaft 120, and at the same time, the cylinder is pressed against the contact surface 121a when the valve is closed. The packing 130 is coupled to maintain the airtight inside and to elastically support the contact surface 121a when the movable shaft moves up and down.

The packing 130 has a plurality of hemispherical contact protrusions 131 are formed in close contact with the contact surface 121a of the movable shaft 120 along an inner circumferential surface to minimize the area of contact with the contact surface 121a, thereby hitting noise. Can be reduced. In this case, the contact protrusion 131 may be formed to have a predetermined inclined surface.

The packing 130 may be made of graphite, which is a refined natural impression graphite product without using additives capable of maintaining heat resistance, flexibility, compression restoring force, and airtightness at high temperatures (about 300 to 650 ° C.). , Likewise made of fluororubber or viton having good elasticity at high temperatures.

On the other hand, the movable shaft 120 is made of a metal material or a material having a corresponding durability, and thus may have improved durability compared to the valve plate made of a conventional synthetic resin.

In the intake valve 100 configured as described above, as the pressure inside the cylinder decreases as shown in FIG. 2B, the movable shaft 120 in the state in which the intake hole 111 of the body 110 is closed moves downward. An intake passage 161 through which air can be introduced into the cylinder is secured.

At this time, while the lower end of the stopper 123 moves downward, the upper end of the elastic support 127 is hit, but the noise is greatly reduced by being elastically supported by the plurality of support protrusions 143.

Subsequently, when the movable shaft 120 is raised again to close the intake hole 111 again, the movable shaft 120 returns to its original position while the sealing portion 121 of the movable shaft 120 hits the packing 130. It is, but also by the plurality of contact protrusions 131 having a resilient hitting noise is significantly reduced.

On the other hand, the structure of the exhaust valve 200 of the present invention shown in Figure 4a is made of a similar configuration of the intake valve 100, the resilient support 240 is included inside the body 210 It is seated on the upper surface of the sealing portion 221 in the state is coupled to the center through the movable shaft and at the same time supports the lower end of the conical coil spring 227.

In this case, a plurality of support protrusions () are formed on the outer circumference of the upper end of the elastic supporter 240 as shown in FIG. 5 to elastically hit the impact surface 215 inside the body 210 when the movable shaft 220 moves up and down. Supporting can reduce the hitting noise.

As the elastic support 240 is disposed inside the body 210, the thickness of the body 210 is somewhat thicker than that of the body 110 of the intake valve.

The exhaust valve 100 is an exhaust passage for exhausting air to the outside of the cylinder while the movable shaft 220 in the state in which the exhaust hole 211 of the body 210 is closed upward as shown in FIG. 4B. Secure (261).

At this time, while the elastic support 240 moves upward with the movable shaft 220 to strike the striking surface 215 of the body 210, in this case, the striking noise is caused by the plurality of support protrusions 243. Greatly reduced.

Subsequently, when the movable shaft 220 descends to close the exhaust hole 211 again, the movable shaft 220 returns to its original position while the sealing portion 221 of the movable shaft 220 strikes the packing 230. In this case, the hitting noise is significantly reduced by the plurality of contact protrusions 231 having elasticity as well.

In the present invention described above, by having a packing and an elastic support body disposed on the intake / exhaust side body, the noise generated in the parts hitting each other during the vertical movement of the movable shaft can be significantly reduced, and the durability of the valve There is an advantage that can be improved.

Claims (5)

The storage tank is disposed inside the holder inserted into the cylinder block of the air compressor and has a storage tank for storing the compressed air by intake / exhaust air as the cylinder in the cylinder block is reciprocated up and down through a drive motor and a pulley interlocking with the drive motor. In the intake / exhaust valve of a cylindrical air compressor, A body having a plurality of suction holes inserted into the intake holder and formed to be inclined toward the lower surface from the upper surface to the lower surface thereof; A movable shaft that is elastically installed in the body by a coil spring and a stopper so as to be movable up and down through the center of the body, and is opened and closed to open and close the plurality of intake holes through a sealing part protruding from a lower end thereof; It is coupled to the inside of the lower end of the body, the inner side has an inclination corresponding to the sealing part of the close contact of the movable shaft, and at the same time, it is compressed to the close contact when the valve is closed to maintain the airtight in the cylinder and when the movable shaft moves up and down A packing for elastically supporting the contact surface to reduce the impact noise; The center is penetrated and coupled to the movable shaft while being seated on the upper surface of the body, and supports the lower end of the coil spring, and elastically supports the lower end of the stopper when the movable shaft moves up and down to reduce the hitting noise. An intake valve made of a support; A body having a plurality of exhaust holes inserted into the exhaust holder and formed to be obliquely penetrating from the upper surface to the lower surface in the center direction; A movable shaft that is elastically installed in the body by a coil spring and a stopper so as to be movable up and down through the center of the body, and opens and closes the plurality of exhaust holes through a sealing part protruding from the lower end as it moves up and down; It is coupled to the inside of the lower end of the body, the inner side has an inclination corresponding to the sealing part of the close contact of the movable shaft, and at the same time, it is compressed to the close contact when the valve is closed to maintain the airtight in the cylinder and when the movable shaft moves up and down A packing for elastically supporting the contact surface to reduce the impact noise; It is included in the inner body of the body is seated on the upper surface of the sealing portion is coupled to the central shaft through the movable shaft and at the same time to support the lower end of the coil spring, when the movable shaft up and down the elastic operation of the impact surface of the inner body Noise reduction intake and exhaust valve of the cylindrical air compressor, characterized in that consisting of an exhaust valve made of an elastic support for reducing the hitting noise by supporting. The noise reduction intake and exhaust valve of claim 1, wherein the packing is made of one of graphite, viton, and fluorine rubber having excellent elasticity and airtightness even at a high temperature. The cylinder of claim 1, wherein the packing of the intake / exhaust valve is in close contact with the contact surface of the movable shaft, and a plurality of contact protrusions having hemispherical or inclined surfaces are formed along the inner circumferential surface to maintain the airtightness of the cylinder. Noise reduction intake and exhaust valve of air compressor. The noise reduction intake and exhaust valve of claim 1, wherein the elastic support of the intake / exhaust valve has a plurality of support protrusions formed along an outer circumference of the upper end. The noise reduction intake and exhaust valve of claim 1, wherein the movable shaft of the intake / exhaust valve is made of a metal material.

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