SU1527445A1 - Intake valve for sealed-away refrigeration compressors - Google Patents

Abstract

The invention relates to a compressor engineering and can be used in hermetic refrigeration compressors. The closure plate 4 is provided with protrusions 9 and 10 and has a rigid bending zone 1 and an elastically flexing zone II. Zone 1 closes the suction port of the seat. The protrusions 9 and 10 are located in zone 1 on a common axis intersecting the axis of symmetry of plate 4 at a right angle from 0 to 0.15 diameter of cylinder 1 from its center towards zone II. As the suction progresses, the protrusions 9 and 10 move in the recesses 7 and 8 of the seal 5 up to the stop at the end 2, which serves as a lift stop. Such an embodiment of the valve eliminates self-oscillation and increases the stroke of the plate. 2 hp f-ly, 2 ill.

Description

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The invention relates to compressor building and can be used in hermetic refrigeration compressors.

A known valve for hermetic refrigeration compressors mounted on the end of a cylinder with an intermediate seal, provided with a recess, contains a lift stop, a saddle with a suction inlet, and a flat locking plate between them that has a shaped outer and inner contours, a cantilever fastening portion and a zoo-shaped projection in contact with the lift limiter and entering the seal groove (USSR Copyright Certificate V 449509, class F 16 K 15/16, 07/07/81).

The disadvantages of the known valve are the location of the limiter in the area opposite to the fixing, which limits the magnitude of the plate stroke, as well as high self-oscillations of the thin plate, which are unacceptable because of the noise generated.

The purpose of the invention is to minimize valve-induced volumetric and indicated compressor losses while at the same time preventing natural oscillations of the valve plate.

The goal is achieved by the fact that the locking plate and the sleep seal, the wife with the second protrusion and the notch, respectively, the locking plate has an elastic bending zone that overlaps the suction inlet and is located between the last and the anchorage area of the elastic-bending zone, the protrusions are located in the hard zone on a common axis intersecting the symmetry axis the plates are at a right angle at a distance from 0 to 0.15 of the diameter of the cylinder from its center towards the elastocross zone, and the limiter of the lift is the end of the cylinder.

In addition, the outer and inner contours of the child zone are profiled by circular arcs with diameters ranging from 0.84 to 0.9 and 0.3 cylinder diameters, respectively.

In addition, the elastic-bending zone is made in the form of one or several strips of constant cross section.

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FIG. 1 shows the cylinder, intermediate seal and closure plate (disassembled) | in fig. 2 - cylinder with suction valve, side view.

The suction valve for hermetic refrigeration compressors, mounted on the end face 2 of cylinder 1 with intermediate seal 5, provided with a notch 7, contains a lift limiter, a saddle 3 with an attachment Dq and a hole 11 and a flat locking plate 4 between the opening 11, with shaped outer and inner contours, between them a cantilever-securing portion 6 and a tongue-like protrusion 9, which is in contact with the lift stop and entering into the recess 7 of the seal 5. The closure plate 4 and the seal 5 are provided with a second slope In addition to the recess 10 and the recess 8, respectively, the locking plate has a rigid I-bending zone I and an elastic-bending zone II located between the latter and the securing portion 6. Lugs 9 and 10 are located in a rigid zone I on a common axis intersecting from the symmetry of plate 4 at a right angle at a distance from 0 to 0.15 of the diameter of cylinder 1 from its center towards the elastically bending zone II, and the lifting limiter is end 2 cylinder 1.

The outer and inner contours of the hard zone I are profiled by circular arcs with diameters ranging from 0.84 to 0.9 and 0.3 of the diameter of the cylinder, lindra, respectively.

Elastic-bending zone II is made in the form of one or several strips of constant cross-section.

The valve operates as follows.

During the suction process, the elastic zone II of the plate 4 under the pressure of the gas bends and the rigid zone I moves away from the saddle 3 into the inside of the cylinder 1, opening the suction opening 11. In this case, the projections 9 and 10 move in the recesses 7 and 8 of the intermediate seal 5 until it stops at the end 2 The plate 4 is prevented from falling out and moving by the securing section 6.

With this valve arrangement, it becomes possible to increase the stroke of the plate, since its protrusions are close

for termination. In addition, self-oscillations are eliminated by increasing stiffness.

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formula of invention

Claims (3)

1. Suction valve for hermetic refrigeration compressors, mustache -; - mounted on the cylinder end with intermediate seal, provided with a notch, containing a lift stop, a seat with a suction inlet and a flat locking plate with an opening that lies between them and a shaped outer and inner contours, section cantilever fastening and a tongue-shaped protrusion, which is in contact with the lift stop and is included in the seal groove, due to the fact that the locking plate and the sleep seal wife second projection and recess, respectively, the locking plate has perekry1527A45 the bending-rigid suction inlet zone and the elastically-bending zone located between the latter and the securing section, the protrusions are placed in the rigid zone in a common 0 five 0 an axis intersecting the axis of symmetry of the plate at a right angle at a distance from 0 to 0.15 diameter from its center towards the elastically-bending zone, and the limit stop of the lift is the end of the cylinder. 2. A valve according to claim 1, characterized in that the outer and inner contours of the rigid zone are profiled with circular arcs with diameters ranging from 0.84 to 0.9 and 0.3 cylinder diameters, respectively. 3. The valve according to claim 1, characterized by the fact that the elastic-flexible zone is made in the form of one or several strips of constant cross section. Phage, g