JPS6018635Y2 - Compressor valve device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a valve device for a compressor.

A suction valve plate that opens and closes the intake air passage formed in the valve seat is installed on the inner surface of the cylinder side of the valve seat held between the cylinder head and the cylinder of the compressor. Compressor valve systems are known in which a discharge valve plate is provided for opening and closing a discharge air passage formed in a seat, and a single spring is used to bias the suction valve plate and the discharge valve plate into the closed position.

The present invention makes the sliding displacement for opening and closing of the discharge valve plate smooth in this type of compressor valve device, and also allows the compressed air from the compressor to pass through the inner diameter hole of the discharge valve plate quickly and easily. It is an object of the present invention to enable smooth discharge and to easily and reliably regulate the lifting height of a discharge valve plate.

According to the present invention, in order to achieve this purpose, a valve seat is installed on the inner surface of the cylinder side of the valve seat sandwiched between the cylinder head and the cylinder of the compressor so as to close the intake air passage of the valve seat. An air passage hole that matches the discharge air passage in the valve seat is formed near the periphery of the suction valve plate, and the inner end of a spindle is fixed to the center of the suction valve plate, and this spindle is placed in the center of the valve seat. A central protruding portion to the outside is slidably penetrated and protruded to the outside of the valve seat on the cylinder head side, and a spring receiver is fixed to the outer end of the spindle, and the central protruding portion of the valve seat on the cylinder head side of the valve seat is fixed to the outer end of the spindle. An annular discharge valve plate is installed on the outer periphery so as to close the discharge air passage, and a compression valve spring is interposed between the spring receiver and the discharge valve plate, and this valve spring pushes the discharge valve plate into the valve seat. At the same time, the same valve spring presses the suction valve plate against the inner surface of the valve seat via the spring receiver and the spindle, and a cylindrical valve plate guide is fitted on the outer periphery of the central protrusion surrounding the spindle. The circumferential surface of the valve plate guide is slidably in contact with the inner diameter hole of the discharge valve plate and serves as a guide portion that guides the discharge valve plate along the valve plate guide. A discharge air passage that is recessed inward is formed over the entire longitudinal length of the valve plate guide, and a convex portion that protrudes radially outward is formed on the tip side of the valve plate guide except for the part where the discharge air passage is located. and the convex portion serves as a means for limiting the lift of the discharge valve plate by impacting against the discharge valve plate, while the spring receiver serves as a means for limiting the lift of the suction valve plate by impacting against the central protrusion of the valve seat. Configures a valve device for a compressor.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a valve body 1 is held between a cylinder head A and a cylinder B, and a piston C is provided in the cylinder B so as to be slidable therein.

Gaskets 3 and 4 are interposed between the cylinder head A and the valve seat 2 which forms the main part of the valve body 1, and a gasket 5 is interposed between the cylinder B and the valve seat 2 to maintain airtightness. Make it.

A disk-shaped suction valve 6 is installed on the lower surface of the valve body 1, and a hole 8 is formed in the center thereof as shown in FIG. 2, and an air passage hole 9 is formed around the hole 8.

The lower end of the spindle 7 shown in FIG.

A discharge valve plate 11 is installed on the upper surface of the valve body 1.

The spindle 7 established in the central hole 8 of the suction valve plate 6 passes upward through the hole 24 of the central protrusion 14 integrally provided in the central part of the valve seat 2 to project upward.

A valve spring 13 in the form of a conical coil is interposed in a compressed state between the spring receiver 12 fixed to the upper end of the spindle 7 by a nut 20 and the discharge valve plate 11.

The valve spring abuts the discharge valve plate 11 as shown at 13' in FIGS. 4 and 5.

A cylindrical valve plate guide 15 is fitted onto the outer periphery of the central protrusion 14 and fixed with a snap ring 19.

As shown in FIG. 3, the valve plate guide 15 has longitudinal (vertical) discharge air passages 23 formed in the form of grooves on its outer surface, and the protrusions between adjacent discharge air passages 23 The outer surface is a guide portion 17 having an arcuate cross section.

A hole is provided in the center of the discharge valve plate 11, and the discharge valve plate 11 is fitted onto the outside of the valve plate guide 15 through this hole.

The hole of the discharge valve plate 11 is in close contact with the guide portion 17 and is guided by it, so that the discharge valve plate 11 can be smoothly slid up and down along the valve plate guide 15.

A convex portion 22 is formed at the upper end of the valve plate guide 15 to protrude outward in the radial direction except for the position where the discharge air passage 23 is located.

The discharge valve plate 11 can only rise to the point where it touches this convex portion 22.

The upper end of the central protrusion 14 is a protruding end 16 that protrudes upward from the valve plate guide 15.

As shown in FIG. 4, the lifting height L2 of the suction valve plate 6 is limited by the lower conical surface 12' of the spring receiver 12, which has descended via the spindle 7, hitting the protruding end 16 of the central protrusion 14. .

Moreover, as shown in FIG. 5, the lift height L1 of the discharge valve plate 11 is
The discharge valve plate 11 is limited by hitting the curved plate 22 as described above.

In the states shown in FIGS. 4 and 5, and in intermediate states, the single valve spring 13 acts directly on the discharge valve plate 11 and indirectly acts on the suction valve plate 6 via the spring receiver 12 and the spindle 7. acting on both valve plates 11, 6
to the closed position.

Since the compressor valve device of the present invention has the above-described configuration, when the piston C enters the downward stroke in the cylinder B, the force of the valve spring 13 is overcome by the pressure difference, and the suction valve plate 6 separates from the valve seat 2 and opens the valve.

At this time, the intake air is transferred from the intake air passage 18 to the intake valve plate 6.
The air flows into the cylinder B through the air passage hole 9 and the outer periphery of the intake valve plate 6.

At this time, the conical surface 12' of the spring receiver 12 comes into contact with the upper surface of the convex portion 16 of the central protrusion 14 of the valve seat 2, thereby keeping the lift of the suction valve plate 6 constant.

Note that since the conical surface 12' of the spring receiver 12 is closed, the air on the high pressure side is prevented from flowing back into the cylinder B through the gap between the spindle door and the hole 24.

When the piston C enters the upward stroke, the suction valve plate 6 is pressed against the valve seat 2 by the force of the valve spring 13.

On the other hand, due to the pressure difference, the discharge valve plate 11 is struck by the force of the valve spring 13 and moves away from the valve seat 2 to open the valve.

At this time, the lift height L□ of the discharge valve plate 11 is such that this valve plate is
It is restricted by hitting the convex part 22 of the central protrusion 14 of.

In this state, the compressed air in cylinder B is discharged from the discharge air passage 1.
0, and is sent to the discharge side from the inner diameter side of the discharge valve plate 11, the discharge air passage 23 of the valve plate guide 15, and the outer periphery of the discharge valve plate 11.

At this time, the discharge valve plate 11 is guided by the guide surface of the guide part 17 on the outer periphery of the valve plate guide 15 while the inner diameter hole of the discharge valve plate 11 is guided by the convex part 2.
It rises smoothly until it hits 2.

After the discharge valve plate 11 rises and leaves the valve seat,
By forming the discharge air passage 23 in a particularly groove shape, compressed air can easily pass through the inner diameter hole of the discharge valve plate 11, and the discharge can be quickly carried out through both the inside and outside of the discharge valve plate. .

As described above, in the present invention, not only can a single valve spring apply biasing force to both the suction valve plate and the discharge valve plate, but also the discharge valve plate can be applied to the valve plate on the outer periphery of the central protrusion of the valve seat. The guide surface of the guide part of the guide guides the discharge valve plate smoothly in the vertical direction to ensure accurate and reliable displacement of the discharge valve plate, and the guide part of the discharge valve plate has a groove-shaped discharge air passage in its longitudinal direction. By doing so, compressed air can be discharged through the discharge valve plate inner diameter hole while guiding the discharge valve plate.
Discharge can be done quickly and smoothly.

Further, by forming a convex portion on the outer periphery of the upper end portion of the cylindrical valve plate guide that fits into the central protrusion, the lift height of the discharge valve plate can be correctly regulated.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the valve device of the present invention applied to a compressor, Fig. 2 is a plan view of the suction valve plate, and Fig. 3 is a cross-sectional view of the valve plate guide portion in Fig. 1 seen from below. FIG. 4 is an explanatory diagram of the action of the valve device of the present invention in the suction stroke, and FIG. 5 is an explanatory diagram of the action in the discharge stroke. A...Cylinder head, B...Cylinder C...Zeston, 1...Valve body, 2
... Valve seat, 3゜4.5 ... Gasket, 6 ... Suction valve plate, 7 ... Spindle, 8 ... Hole part, 9...air passage hole part,
10...Discharge air passage, 11...Discharge valve plate, 12...Spring holder, 13...
・Valve spring, 14... Central protrusion, 15.
...Valve plate guide, 16...Tip, 17.
...Guide section, 18...Intake air passage, 1
9... Snap ring, 22... Convex portion, 23... Discharge air passage, 24... Hole.

Claims (1)

[Scope of utility model registration request] On the inner surface of the cylinder side of the valve seat sandwiched between the cylinder head and cylinder of the compressor, there is a discharge air passage in the valve seat near the periphery of the suction valve plate, which is installed to close the intake air passage in the valve seat. The inner end of a spindle is fixed to the center of the intake valve plate, and the spindle is slidably passed through an outwardly extending central protrusion in the center of the valve seat. , protrude to the outside of the valve seat on the cylinder head side, and fix the spring receiver to the outer end of the spindle.
A compression valve spring is interposed between the outer periphery of the central protrusion of the valve seat on the cylinder head side and an annular discharge valve plate so as to close the discharge air passage. The same valve spring retainer presses the suction valve plate against the valve seat inner surface through the spindle, and the outer periphery of the central protrusion surrounding the spindle has a cylindrical valve plate guide surface. A guide part is used to slidably contact the inner diameter hole of the discharge valve plate and guide the discharge valve plate along the valve plate guide, and a discharge air passage recessed inward from the outer surface of the guide part is provided in the valve body guide. The body guide is formed over the entire length in the longitudinal direction, and a convex part is provided on the distal end side of the valve plate guide that protrudes radially outward except for the part where the discharge air passage is located, and this convex part is connected to the discharge valve plate. A valve for a compressor, characterized in that the spring receiver serves as means for limiting the lift of the discharge valve plate by impact, and the spring receiver acts as a means for limiting the lift of the suction valve plate by impact against the central protrusion of the valve seat.