JPH0433426Y2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] This invention relates to a valve gear for a reciprocating compressor having a ring-shaped discharge valve.

[Conventional technology]

FIG. 3 is a sectional view showing a conventional valve device disclosed in, for example, Japanese Utility Model Application No. 58-73974. In the figure, 1 is a valve presser, 2 is a valve seat plate, 3 is a ring-shaped discharge valve, 4 is a ring-shaped valve presser spring, and the valve device integrates each of the above parts and a thrust washer 5. It is composed of rivets 6.

Next, the operation will be explained. The gas compressed in the compression chamber (not shown) pushes up the ring-shaped discharge valve 3 against the pressure of the valve pressing spring 4 and the ring-shaped discharge valve 3 against the valve seat plate 2, and is discharged from the discharge hole 2a. be done. As shown in FIG. 4, this valve pressing spring 4 is curved upward on both sides with the center line O--O as the center of the curve. Further, the valve retainer 1 contacts the upwardly curved portions a and b of the valve retainer spring 4 through the thrust washer 5 at portions A and B shown in FIG.

No discharge hole is provided on the compression side where the valve pressing spring 4 and the ring-shaped discharge valve 3 contact each other in the cross-sectional assembled state from the O--O center line.

While the compressed gas is being discharged from the discharge hole 2a, the ring-shaped discharge valve 3 and the valve pressing spring 4 are in the operating state shown in FIG. 6. Therefore, while the compressor is operating, the upwardly curved portions a and b of the valve presser spring 4 repeat minute movements at the contact portions A and B with the thrust washer 5.

[Problem that the invention attempts to solve]

Since the conventional valve device is configured as described above, when the compressor is operating, the valve pressing spring 4 repeats minute scraping and at the same time causes a rotational movement around the rivet 6, sometimes causing the discharge hole 2a to rotate. O- shown in Figure 4
There was a problem that the O center line was large and caused a large loss in the discharge of compressed gas.

This invention was made in order to solve the above-mentioned problems, and the purpose is to obtain a valve device that can obtain stable performance without changing the component parts.

[Means for solving problems]

The valve device according to this invention has the inner shape of a valve pressing spring that presses down a ring-shaped discharge valve, and the shape of a part of the central support portion of the valve holder to the valve seat plate.

[Effect]

The valve device according to this invention restricts the movement of the valve presser spring in the rotational direction by matching the shapes of the valve presser spring and the central support of the valve holder.

[Example of idea]

Next, this invention will be explained with reference to one embodiment.

FIG. 1a shows a plan view of the valve pressing spring viewed from the bottom (valve seat plate side), and FIG. 1b shows a plan view of the valve pressing spring. Reference numerals 1 to 6 indicate the same or equivalent parts as those of the conventional device to avoid duplication of explanation. In the figure,
The shaded area indicates the contact surface to the valve seat plate 2, and the outer shape of the central contact surface 1a is partially aligned with the position side shape of the valve presser spring 4, and the valve presser spring 4 is assembled in the vertical direction. It is formed of a dimension that does not obstruct movement and can restrict movement of the valve pressing spring 4 in the rotational direction.

Because of this structure, the valve press spring 4 is caused by a slight slippage due to changes in pressure and gas flow caused by the movements of the valve press spring 4 and the ring-shaped discharge valve 3 during compressor operation as shown in FIG. This can prevent the valve pressing spring 4 from occasionally covering the discharge hole as it rotates repeatedly.

When the valve pressing spring 4 is above the discharge hole 2a, the pressing force applied to the ring-shaped discharge valve 3 increases significantly.
The performance of the compressor may be reduced, such as a decrease in volumetric efficiency and loss of work due to overcompression of the compressor, or an increase in the temperature of the discharged gas, and an increase in noise due to an increase in the speed of the ring-shaped discharge valve 3 hitting the valve seat plate 2. However, since the valve pressing spring 4 is regulated by this invention, it is possible to prevent this from happening.

FIG. 2 shows another embodiment of this invention. In the figure, the inner shape of the outer contact surface 1-b of the valve retainer 1 is made to match the outer shape of the valve retainer spring 4, and regulates the rotation direction. In the second embodiment, the central space immediately after discharge is wider than that in FIG. 1, which improves the gas flow and improves compression efficiency.

[Effect of idea]

As described above, according to this invention, the shape of the valve presser spring and the corresponding part of the valve holder are made the same shape, and the structure is configured to prevent rotation of the valve presser spring, thereby improving compression efficiency, noise, etc. effective.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of this invention, a
is a plan view of the valve holder viewed from the bottom (valve seat plate side), b
2 shows a plan view of the valve pressing spring, and FIG. 2 shows another embodiment of this invention, where a is a plan view of the valve pressing spring viewed from the bottom (valve seat plate side), and b is a plan view of the valve pressing spring. A plan view, FIG. 3 is a sectional view of a conventional valve device, and FIG. 4 is a sectional view of a conventional valve device.
The figure is an explanatory diagram of the same valve holder, and Figure 5 is a sectional view of the same.
FIG. 6 is a diagram showing the operating state of the valve. In the figure, 1 is the valve holder, 1a is the central contact surface of the valve holder, 1b is the outer contact surface of the valve holder, 2 is the valve seat plate, 2a
3 is a discharge hole, 3 is a ring-shaped discharge valve, 4 is a valve presser, 5 is a thrust washer, and 6 is a rivet. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] (1) A valve seat plate having a discharge hole for compressed gas provided in the cylinder head, and a valve seat plate fixed at a predetermined distance from the discharge hole of the valve seat plate. Valve holder and
A ring-shaped discharge valve mounted between the valve holder and the valve seat plate, a ring-shaped valve pressing spring that presses the discharge valve against the valve seat plate, and a space between the ring-shaped valve pressing spring and the valve holder. A reciprocating compressor valve device comprising a thrust washer installed in a reciprocating compressor, characterized in that a central support portion of the valve holder to the valve seat plate is partially matched to the inner shape of the valve presser spring. Machine valve equipment. (2) The valve device for a reciprocating compressor according to claim 1, wherein the outer support portion of the valve holder for the valve seat plate is matched to the outer shape of the valve holder spring plate.