JPS6140952Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a valve device for a compressor that uses an annular suction valve to open and close a suction port provided in an annular shape on the valve seat of a reciprocating compressor in which a plurality of cylinders are arranged side by side in the direction of the crankshaft. This is related to the improvement of.

First, regarding this type of conventional valve device, the first
This will be explained with reference to FIGS. 2 and 3. Figure 1 shows
Figure 2 is a plan view of the cylinder top, and Figure 2 is A of Figure 1.
- It is a sectional view taken along the A line. In the figure, 1 is a cylinder, 1a is provided at the periphery of the cylinder opening,
Suction valve engaging portion inclined toward the center of the cylinder, 1
b is a valve receiving part provided on the periphery of the cylinder opening and is a stepped part of an arbitrary depth, and 2 is an engaging part 1 on the outer periphery.
a, an annular suction valve having a protrusion that engages with the valve receiving portion 1b; 3, a pin that restricts movement of the suction valve 2; 4;
5 is a suction gas passage, 5 is a piston that slides inside the cylinder 1, 6 is a valve seat, 6a is a communication port provided in the valve seat 6 that communicates with the suction gas passage 4, and 6b is an annular opening into the cylinder 1. The suction port communicates with the communication hole 6a. 6c is a discharge port, 7 is a discharge valve for opening and closing the discharge port 6c, 8 is a discharge valve holder, and 9 is a rivet for fastening the discharge valve 7 and the discharge valve holder 8 to the valve seat 6. A cylinder cover 10 is attached to sandwich the valve seat 6, and has a suction chamber 10a communicating with the suction gas passage 4 and the communication port 6a, and a discharge chamber 10b located above the valve seat 6. Reference numeral 11 denotes a gasket that maintains airtightness between the cylinder 1 and the suction chamber 10a, and between the suction chamber and the outside world, and its shape is shown in FIG. 1
2 is a disc spring that maintains airtightness between the suction chamber 10a and the discharge chamber 10b.

In the conventional compressor valve device having the above configuration, as shown in FIG. 1, the distance l between the valve receiving portions 1b of the adjacent cylinders 1 is equal to the valve receiving relief of the packing 11 in FIG. It is restricted by the width m between the parts and must be l≧m. That is, in order to maintain airtightness between adjacent cylinders, the width m is generally required to be 3 to 5 mm or more. Therefore, if the distance from the outer circumference of the cylinder to the outer circumference of the valve receiving part is n, the cylinder pitch P is P≧ The relationship D + 2n + l ≧ D + 2n + m must be satisfied, and the cylinder pitch P becomes larger than necessary. Therefore, the cylinder part of the compressor becomes larger, and as a result, each component of the compressor (crank case, cylinder cover, crankshaft) becomes larger. This has the drawback of increasing the length of the compressor, making the shape of the compressor larger.

The present invention has been made in view of the above points.

An embodiment of the present invention will be described below with reference to FIGS. 4 and 5. FIG. 4 is a top plan view of the cylinder according to the present invention, and FIG. 5 is a packing according to the present invention, which corresponds to the conventional one shown in FIG. 3.

That is, as shown in Figure 4, with respect to the crankshaft direction.
By providing the suction valve engaging portion 1a and the suction valve receiving portion 1b at the periphery of the opening of one cylinder so as to form an angle of 45°, the cylinder pitch P only needs to satisfy the relationship P≧D+l. , compared to the conventional one
Since the cylinder pitch can be shortened by 2n, the crankcase, crankshaft, and cylinder cover can be shortened by 2n in the crankshaft direction, making it possible to obtain a compact, lightweight, and low-cost compressor.

Furthermore, since the suction valve engaging portion 1a is inclined toward the center of the cylinder as described above, when forming this inclined surface, the compressor or cylinder block must be inclined and machined, which is troublesome and difficult. However, the spacer 1 has a trapezoidal cross section as shown in FIG.
3 and fastened to the pin 3 through the hole 13a, a spacer mounting step 14 is provided on a part of the periphery of the cylinder opening at a position of 45° with respect to the crankshaft direction as described above, and the suction valve is connected to the Processing can be facilitated by forming a joint. 15 in the figure is a spacer 13
This is an adhesive that fills the gap between the spacer mounting step 14 and the spacer mounting step 14 to prevent an increase in clearance volume.

As described above, the present invention connects the engaging part and valve receiving part provided on the periphery of the cylinder opening to the crankshaft, which engages with the annular suction valve which has the protruding part serving as the engaging part and the valve receiving support part on the outer periphery. An engaging part provided at an angle of 45 degrees with respect to the direction and having an inclination is formed by another spacer, and when the spacer is attached to the spacer mounting stepped part on the periphery of the cylinder opening to which the spacer is attached, the spacer and the stepped part are Since this gap is filled with adhesive, the cylinder pitch is small, that is, the crankcase, crankshaft, cylinder cover, and cylinder block are small, and the increase in clearance volume is suppressed. You can get a cheap compressor.

[Brief explanation of drawings]

Fig. 1 is a plan view of the cylinder top of a conventional compressor, Fig. 2 is a sectional view taken along line A-A in Fig. 1,
Fig. 3 is a plan view of the packing, Fig. 4 is a plan view of the cylinder top of an embodiment of the present invention, Fig. 5 is a plan view of the packing of the invention, and Fig. 6 shows the suction valve engaging portion with a spacer. FIG. In the figure, 1 is a cylinder, 1a is a suction valve engaging part inclined toward the center of the cylinder, 1b is a suction valve receiving part, 2 is a suction valve, 3 is a pin, 6 is a valve seat, 11 is a packing, and 13 is a A spacer forms a suction valve engaging portion, 14 is a spacer attachment portion, and 15 is an adhesive. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) In a reciprocating compressor in which a plurality of cylinders are arranged adjacent to each other in the direction of the crankshaft and a piston slides inside the front cylinder, the cylinder center is located at the periphery of the cylinder opening. An engaging portion having an inclination toward the center of the cylinder and symmetrical to the center of the cylinder, and a valve receiving portion of an arbitrary depth facing the engaging portion in a cross shape, and an annular suction port facing the cylinder opening. an annular suction valve that opens and closes the suction port, the valve seat having a valve seat and an engagement protrusion that faces the valve seat, protrudes a part of its outer circumferential portion, and engages the engagement portion and the valve receiving portion; and in which the movement of the suction valve is guided by a pin implanted in the engaging portion, the engaging portion and the valve receiving portion forming an angle of 45° with respect to the axial direction of the crankshaft. A valve device for a compressor, characterized in that the valve device is provided at the periphery of the cylinder opening. (2) Practical use characterized in that a spacer having a trapezoidal cross section is provided at the periphery of the cylinder opening to form the inclined engagement part, and the pin is embedded in the engagement step part of a constant depth. A valve device for a compressor according to claim (1) of patent registration. (3) The compressor valve device according to claim 2, wherein the spacer is attached to the engaging step portion with an adhesive.