JPS5857091A - Reciprocation type compressor - Google Patents

Abstract

PURPOSE:To obtain a small size and make compression at least twice or more per rotation of a drive shaft by providing a waved groove with a fixed period and amplitude on the periphery of a piston to be fitted with inner exposed ends of pins of a cylinder to be slided. CONSTITUTION:When a drive shaft 1 is driven for rotation, since projections 1a, 1b, 1c, and 1d on the drive shaft 1 are fitted into grooves 2a, 2b, 2c, and 2d on the inner circumference of a cylindrical piston 2 to be easily slided, the piston 2 is given a rotational force. In this construction, since a waved groove 2l with a fixed period and amplitude is provided on the periphery of the piston 2 to be fitted with inner exposed ends of pins 4a-4d of a cylinder 3 to be easily slided, in this example, the piston 2 is slided four times toward compression to make four compressions per rotation of the drive shaft 1. This construction permits to obtain a small-sized compressor capable to make compression at least twice or more per rotation of the drive shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention was proposed for the purpose of providing a small-sized reciprocating compressor capable of performing compression twice or more per revolution of the drive shaft. A cylindrical piston is fitted to the outer periphery of one end of the shaft so as to be slidable along the axial direction, has a communication hole between it and the drive shaft, and has a communication hole and a check valve at the top; A reciprocating compressor consisting of a cylinder that is slidably housed in the axial direction and has a valve plate with a valve hole and a check valve, and a casing that houses the cylinder and has a gas suction port and a gas discharge port. A wave-shaped groove having a predetermined period and amplitude meandering in a direction perpendicular to the axis of the drive shaft is provided on either the outer circumferential surface of the piston or the inner circumferential surface of the cylinder; The other side is provided with a pin that slidably engages with the corrugated groove, so that when the drive shaft rotates,
The piston is held so as to slide relative to the cylinder only in the axial direction, and when the piston slides in the suction direction, the gas sucked from the suction port is slid in the compression direction. The present invention relates to a reciprocating compressor characterized in that the compressor is configured to discharge from the discharge port.

The present invention will be specifically explained below with reference to embodiments shown in FIGS. 1 to 3.

In FIG. 1, reference numeral 1 denotes a drive shaft that is driven and rotated by a drive source (not shown), and the drive shaft 1 is provided at one end to protrude radially at equal intervals along the circumferential direction, as shown in FIG. It has a plurality of (four in this example) protrusions 1a, 1b, 1c, and 1d. 2 is a cylindrical piston, and on the inner periphery of the piston 2 are protrusions 1a and 1 of the drive shaft 1 along the circumferential direction.
Grooves 2a and 2b that fit into grooves 2a and 2b, respectively.
, 2c, and 2d are provided as shown in Fig. 3,
The piston 2 is fitted concentrically to the outer periphery of the drive shaft 1 so as to be relatively slidable along the axial direction thereof.

Further, the inner periphery of the piston 2 is provided with the groove 2a.

Grooves 2e+2f are located between adjacent grooves 2b, 2c, and 2d.

2g and 2h are provided as shown in FIG. It's communicating. Reference numeral 14 denotes a disk-shaped check valve whose central portion is fixed to the outer end surface of the top portion 21 of the piston 2 by an en 15 as shown in FIG. The communication hole 2k provided as shown in FIG. It is set to be sent.

Further, on the outer periphery of the piston 2, a wave-shaped groove 2t having a constant period and a constant amplitude is provided, as shown in FIG. .

As shown in FIGS. 1 and 2, the cylinders 6 into which the piston 2 fits are fixed radially at equal intervals along the circumferential direction, and have a plurality of cylinders (in this example, four cylinders) with exposed inner ends. The piston 2 has pins 4a, 4b, 4c, and 4d, and the exposed inner ends of these pins are slidably fitted into the corrugated groove 20t provided on the outer periphery of the piston 2, as described above. Reference numeral 5 denotes a valve plate fixed to the cylinder B as shown in FIG. The valve 16 allows the gas in the space Sl to
The water flows only into a space S2 formed by the outer surface of the valve plate 5 and the rear casing 7 through the valve hole 5a.

6 is the front casing, and the cylinder 3 is connected to the cylinder 3 by the hinge 9.
The cylinder B is connected to the cylinder B so as to restrict displacement of the cylinder B in the axial direction. 8 is a tightening bolt that connects the front casing 6 and the rear casing 7, 10 is an O-ring, 11 is a bearing, 12 is a shaft sealing device, 13 is a piston ring, 19 is a suction port, 20 is a discharge port, respectively. , and these members are arranged at the positions shown, respectively.

In the illustrated example, the piston 2 has a corrugated groove 2 on its outer peripheral surface.
The case where the piston 2 is slid in the axial direction by fitting the pin of the cylinder B to this is shown.
A configuration may also be adopted in which a wave-shaped groove is provided on the inner circumferential surface of the cylinder 3, and a pin that fits into the wave-shaped groove is provided on the piston 2 side to cause the piston 2 to reciprocate in the axial direction.

An embodiment of the compressor of the present invention is configured as described above, and when the drive shaft 1 is driven and rotated by a drive source (not shown), the protrusions la, 1b, Ic,
1d are grooves 2a, 2b on the inner circumference of the cylindrical piston 2,
Since the piston 2 is slidably fitted in the pistons 2c and 2d, rotational force can be applied to the piston 2. In this case, the wave-shaped groove 2t on the outer periphery of the piston 2 and the pins 4a, 4b, 4c of the cylinder 6,
Since the inner end exposed portion 4d is slidably fitted, the piston 2 slides in the axial direction with a period and amplitude determined by the shape of the wave groove 2t, and repeats reciprocating motion within the cylinder 3. . When the piston 2 moves in the suction direction due to the reciprocating motion of the piston 2, the outside air sucked in from the suction port 19 is
It enters the cavity 2j through the communication holes 2e, 2f, 2g, and 2h of the piston 2, and further enters the space Sl through the communication hole 2k and the valve 14. Then, when the piston 2 moves in the compression direction, the gas in the space Sl is pushed out through the valve hole 5a and the check valve 16, and after being temporarily stored in the space $2, it becomes high pressure gas from the discharge port 20. It is discharged.

In this example, since the shape of the wave-shaped groove 2t on the outer periphery of the piston 2 is formed as shown in FIG.
per revolution, the piston 2 slides in the compression direction 4 times and
compression is performed.

The illustrated example shows an example of a reciprocating compressor for vehicle air conditioning in which compression is performed four times per rotation of the drive shaft. ), and by appropriately changing the number and arrangement of the pins of the cylinder 6, it is possible to realize a compressor that performs compression twice or more per rotation of the drive shaft 10. Moreover, it goes without saying that the present invention can be applied to a hermetically sealed electric compressor in which a motor is integrally sealed, and other compressors.

Since the compressor of the present invention has the above-mentioned configuration and operation, as can be seen from FIG. A practical effect can be achieved in that a reciprocating compressor capable of performing compression at least twice or more can be realized.

[Brief explanation of the drawing]

The attached drawings are a schematic illustration of an embodiment of the invention [&l, Part 1]
The figure is a vertical cross-sectional view, Figure 2 is a cross-sectional view taken along the ■-■ line in Figure 1, and Figure 6 is a cross-sectional view taken along the
The figure is a perspective view of the piston. 1: Drive shaft, 2: Piston, 2a, 2b, 2c,
2d: Fitting groove with projections 1a, 1b, Ic, and 1d of drive shaft 1, 2e, 2f12gl 2h: Communication hole, 21:
Top, 2J: cavity, 2: communication hole, 2t: corrugated groove,
Roniji cylinder, 4a, 4b, 4c, 4d: bottle, 5: valve plate with valve 5a, 6: front casing, 7: rear casing, 11: bearing, 12: shaft sealing device, 14.1
6: Check valve, 19: Suction port, 20: Discharge port, Sl, S
l: Space. Horse 1 Figure Horse 2 Figure Tail 3 Procedural Amendment January 6, 1980 Commissioner of the Patent Office Shima 1) Haruki Tono1, Indication of the case 1981 Patent Application No. 1538422, Title of invention Reciprocating type Compressor 3, Relationship with the amended person case Patent Applicant Address: 2-5-1 Marunouchi, Chiyoda-ku, Tokyo 100 Name (620) Mitsubishi Heavy Industries, Ltd. Representative Yano - 4, Sub-Agent Address: Toranomon Industrial Building, 2-29 Toranomon-chome, Minato-ku, Tokyo 105 TEL (501) 3706Z Contents of Amendment (1) The scope of the claims will be amended as shown in the attached sheet. (2) On page 2, line 10 of the specification, the phrase "slidably accommodated along the axial direction" is corrected to "slideably accommodated relatively along the axial direction." (3) In the second line from the bottom of the second page, "relatively only in the axial direction" is corrected to "relatively in the axial direction." (4) Correct the ``Wave groove 20zJ'' on the last line of the 4th page to ``Wave groove 2tJ''. , or conversely, insert a structure in which cylinder A is configured to reciprocate in the axial direction. [Claims] ``A drive shaft is fitted to the outer periphery of one end of the drive shaft so as to be slidable along the axial direction, has a communication hole between it and the drive shaft, and has a communication hole and a check valve at the top. a cylindrical piston having a cylindrical piston, a cylinder accommodating the piston so as to be relatively slidable along the axial direction, and having a valve plate having a valve hole and a check valve; In a reciprocating compressor comprising a casing having a discharge port and a discharge port, either the outer circumferential surface of the piston or the inner circumferential surface of the cylinder is provided with a predetermined period and amplitude of meandering in a direction perpendicular to the axis of the drive shaft. A corrugated groove is provided, and a pin is provided on the other side of the corrugated groove to slidably engage with the corrugated groove when the drive shaft rotates. The pin is held so as to slide relative to the cylinder in the axial direction, and when the piston slides in the suction direction, the gas sucked from the suction port is compressed. A reciprocating compressor configured to discharge from the discharge port. Procedural amendment 1981: March 119 Haruki Shimada, Commissioner of the Patent Office1, Indication of the case 1982 Patent Application No. 1538422, Title of invention Reciprocating compressor 3, Name of the person making the amendment Related Patent Applicant Address: 15-1 Marunouchi 2-chome, Chiyoda-ku, Tokyo 100
Number: Name (620) Mitsubishi Heavy Industries, Ltd. Representative Uji Yano 4, Sub-Agent Address: Toranomon Industrial Building, 2-29 Toranomon-chome, Minato-ku, Tokyo 105 TEL (501) 3706 Name
(6501) Patent Attorney Teru Ito (2 others) 7. Contents of amendment (1) The scope of claims is amended as shown in the attached sheet. (2) 7. of the procedural amendment dated January 5, 1981. Correction details f21. Delete f31. (Delete “1111 reciprocating compressor on the outer periphery of one end of the drive shaft” from page 2, line 6 to page 6, line 4 of the 31 Specification, and insert the following phrase in the corresponding part.・It has a cylindrical piston attached to the drive shaft and a cylinder that houses the piston.
A groove meandering in a direction perpendicular to the axis of the drive shaft is provided on either the outer peripheral surface of the piston or the inner peripheral surface of the cylinder, and a pin that engages with the groove is provided on the other side, so that rotation of the drive shaft causes the piston to connect with the piston. A reciprocating compressor characterized in that the cylinder is held so that it can move relative only in the axial direction, and that suction and discharge ports are provided that communicate with a cylinder chamber within the cylinder that is closed by the top surface of the piston. ” A compressor according to the claims above.

Claims (1)

[Claims] A cylindrical piston that is fitted to the outer periphery of one end of a drive shaft so as to be slidable along the axial direction, has a communication hole between it and the drive shaft, and has a communication hole and a check valve at the top; A reciprocating type consisting of a cylinder that houses the cylinder and has a valve plate with a valve hole and a check valve, and a casing that houses the cylinder and has a gas suction port and a gas discharge port. A wave-shaped groove having a predetermined period and amplitude meandering in a direction perpendicular to the axis of the drive shaft is provided on either the outer circumferential surface of the piston or the inner circumferential surface of the cylinder in the compressor; The other side is provided with a pin that slidably engages with the wave-shaped groove to hold the piston so that it slides only in the axial direction relative to the cylinder when the drive shaft rotates, and to A reciprocating compressor characterized in that the gas sucked in from the suction port when sliding in the suction direction is discharged from the discharge port when sliding in the compression direction.