JPS6245103Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a ring valve mounting device for a compressor.
In particular, it relates to air compressors.

As is well known, valves used in compressors automatically open and close depending on the pressure difference between the inside and outside of the cylinder.
Since the opening/closing operation involves rapid reciprocating motion, it must be robust and less susceptible to damage. In particular, in the case of a reciprocating type compressor, the compressor is held separately between a cylinder and a cylinder cover.

On the other hand, since the outer periphery of the cylinder and the cylinder cover are fastened and fixed with several bolts, the valve itself is also supported only by the periphery. Therefore, the central portion of the valve is subject to deformation due to repeated rapid compressive forces or partial tightening of bolts when clamping the valve. In particular, when the center and periphery of the valve are divided by a cylindrical body and configured into a suction valve and a discharge valve, the seal at the joint between the cylindrical body and the cylinder cover is deformed, and the suction side and the discharge valve are separated. There is a risk of communication between the two sides.

The present invention was devised in order to eliminate this inconvenience, and its purpose is to provide play for the deformation of the valve and to provide a sufficient seal.

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

The attached drawing shows a three-stage V-type compressor that supplies compressed air for starting a diesel engine, and is driven by a motor (not shown). First, I will give an overview.

Reference numeral 1 designates a crankcase from which a first-stage cylinder 2 and a second-stage cylinder 3 are protruded in a V-shape. A first stage cylinder cover 4 is attached to the top of the first stage cylinder 2.
is clamping the first stage ring valve 5 and fastened and fixed with several bolts 6. A second stage cylinder cover 7 is also fixed to the top of the second stage cylinder 3 with a second stage ring valve 8 interposed therebetween by several bolts (not shown). In each cylinder 2, 3, a first stage piston 9 and a second stage piston 10 are reciprocated and slid by rotation of a crankshaft 11. Here, the second-stage cylinder 3 has a skirt portion 12 formed with a slightly smaller diameter, and a crown portion 1 of the second-stage piston 10.
3 is matched to the diameter of second stage cylinder 3. Therefore, within the second stage cylinder 3, the skirt portion 12
The crown portion 13 forms a donut-shaped third stage compression chamber 14. A third cylinder is provided at the middle side of the second stage cylinder 3 so as to communicate with the third stage compression chamber 14.
Stage supply ring valve 15 and third stage discharge ring valve 16
is installed protrudingly.

A large number of cooling fins 17 are protruded from the outside of each cylinder 2, 3 and each cylinder cover 4, 7, and cool air is blown by a cooling fan (not shown).

The above is an overview of the three-stage V-type compressor of this embodiment. To describe its operation, when the crankshaft 11 is rotated by a motor (not shown), the first stage piston 9 is lowered, and the compressor (not shown) Outside air is sucked in from the passage a communicating with the silencer through a chamber 19 formed in the center of the first stage cylinder cover 4, and as the piston 9 rises, the air is compressed and formed around the first stage cylinder cover 4. The liquid is discharged into a doughnut-shaped chamber 20. Compressed air from the chamber 20 passes through a passage 6 to a cooler 21
The liquid is cooled at the cylinder cover 7, and is supplied to a chamber 23 formed in the center of the second stage cylinder cover 7 through a pipe 22 provided on the top surface of the cylinder cover 7. The compressed air that enters the cylinder 3 as the second stage piston 10 descends is further compressed as the piston 10 rises, and is discharged into a donut-shaped chamber 24 formed around the second stage cylinder cover 7. . The compressed air from the chamber 24 passes through the passage c, is cooled by a cooler 25, and is then sent to the third stage supply ring valve 15 via a pipe 26 provided on the side of the second stage cylinder 3.
It is supplied to the third stage compression chamber 14 via. As the second stage piston 10 descends, the compressed air in the compression chamber 14 is further compressed, and the third stage discharge ring valve 16
, passes through a pipe 27 provided on the side of the second stage cylinder 3, and is cooled by a cooler 28 in a passage d.
Compressed air is supplied to the storage tank.

Here, in the present invention, the mounting device for the first stage ring valve 5 (the second stage ring valve 8 also has the same structure, although the dimensions are different) is configured as shown in the enlarged view of Fig. 2. . That is, the first stage ring valve 5 has two
The upper and lower valve seats 29 and 30 are fastened together by a central bolt 31, and a plurality of concentric circular grooves 32 are formed in the upper and lower valve seats 29 and 30, as in a normal annular valve. The circular groove 3 is provided between the upper and lower valve seats 29 and 30.
The arc-shaped valve plate 33 and the arc-shaped corrugated plate spring 34 are overlapped and interposed so as to close the valve plate 2. The upper valve seat 29 has a cylindrical body 35 projecting thereon, and the cylindrical body 35 fits into the partition wall 36 of the chamber 19 of the first stage cylinder cover 4.
A cylindrical groove 37 that slides up and down is provided. Cylindrical body 3
An O-ring 39 is fitted to the outer periphery of 5. A gasket packing 38 is inserted between the upper valve seat 29 and the outer periphery of the first stage cylinder cover 4.

Therefore, when the first-stage cylinder 2, first-stage cylinder cover 4, and first-stage ring valve 5 are tightened with several bolts 6, the outer peripheries of these are pressed against the gasket packing 38, etc., and are made airtight. It can be kept, but
With these bolts 6, it is difficult to maintain airtightness at the joint between the cylindrical body 35 and the partition wall 36, especially when the upper and lower valve seats 2
Since there is a possibility that the valve seats 29 and 30 may be deformed, this joint is made slidable, and even if the valve seats 29 and 30 are deformed, the O-ring 39 can maintain airtightness at all times. Therefore, a clearance 40 is provided between the top of the cylindrical body 35 and the end of the cylindrical groove 37.

In summary, the present invention provides a ring valve that is interposed between the cylinder and cylinder cover of a compressor and has a cylindrical body separating the suction side and the discharge side, and the outer circumference of the ring valve is fastened and fixed with a plurality of bolts. In addition, since this is a compressor ring valve mounting device in which the cylindrical body and the cylinder cover are slidably joined and a seal is interposed in the sliding part, the cylindrical body separates the suction side and the discharge side. By fastening and fixing the outer circumference of the plucked ring valve to a cylinder, etc., even if the center of the ring valve deforms into a curved shape, the cylinder body and cylinder cover slide to absorb the deformation. Since they are interposed, the suction side and the discharge side do not communicate with each other. Since the cylindrical body and the cylinder cover are slid together, bolt fastening work can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an enlarged view of the main part of FIG. 2, 3...1st stage, 2nd stage cylinder, 4,7...
...1st stage, 2nd stage cylinder cover, 5, 8...1st stage
Stage, second stage ring valve, 6...bolt, 35...cylindrical body, 39...O ring.

Claims (1)

[Scope of utility model registration request] In a ring valve that is interposed between the cylinder of the compressor and the cylinder cover and has a cylindrical body separating the suction side and the discharge side, the outer periphery of the ring valve is fastened and fixed with a plurality of bolts, and the cylindrical body A ring valve mounting device for a compressor, in which a cylinder cover and a cylinder cover are slidably joined, and a seal is interposed in the sliding part.