CN1916406A

CN1916406A - Piston-reciprocating gas compressor

Info

Publication number: CN1916406A
Application number: CNA2006101150088A
Authority: CN
Inventors: 井上弘; 河本明
Original assignee: Anest Iwata Corp
Current assignee: Anest Iwata Corp
Priority date: 2005-08-19
Filing date: 2006-08-18
Publication date: 2007-02-21
Also published as: JP2007051615A; US20070041847A1

Abstract

A drive shaft is driven by an electric motor in a motor casing. A crankshaft integrally connected with the drive shaft is provided in a crankcase. A piston is reciprocated by the crankshaft in a cylinder. A gas is introduced from the outside into the motor casing and forwarded into the crankcase. The gas is further guided into a space on the piston through a gas-guiding groove formed in the inner circumference of the cylinder. The piston moves up to compress the gas in the space while the piston closes the upper end of the gas-guiding groove, so that the gas is discharged to the outside.

Description

Gas compressor with reciprocating piston

Technical field

The present invention relates to by making piston move back and forth the gas compressor with reciprocating piston of pressurized gas.

Background technique

As shown in Figure 2, known a kind of gas compressor with reciprocating piston, wherein a side and the opposite side at the roof 22 of cylinder 21 provides venting check valve 23 and inhalation check valve 24.On venting check valve 23 and inhalation check valve 24, provide suction chamber 26 with inlet 25 and discharge chamber 28 respectively with outlet 27.At the crankcase 29 that is arranged in below the cylinder 21, bent axle 31 one are connected on the live axle 30.Electric motor 32 by being positioned at crankcase 29 outsides drives live axles 30, makes bent axle 31 move back and forth piston 34 in the cylinder 21 via piston rod 33.From for example N of 25 gases that suck that enters the mouth ₂Be introduced in the space on the piston 34 via inhalation check valve 23, be compressed and discharge via venting check valve 24 and outlet 27.

In this gas compressor with reciprocating piston,, leak on piston 34 peripheral part ground and be back in the crankcase 29 thereby be introduced in gas in the space on the piston 34, and discharge into the atmosphere from vent 35 along with moving back and forth of piston 34.If this gas is poisonous, then can cause environmental pollution.

In sucking pressurized gas and boosting type compressor with its further compression, restarting or non-loaded operation period, pressing chamber is depressurized in sucking step, makes to be incorporated into that gas in the crankcase 29 flow in the space on the piston 34 and to mix and make its concentration reduction with the gas from inlet 25 between the interior week of the periphery of piston 34 and cylinder 21 via vent 35.

In addition, in order to cool off electric motor 32, must in motor shell 36, provide vent 40 and the blowing fan is installed on live axle 30 to carry out the pressure cooling.Therefore sealing electric motor fully, thus cause noise leakage and/or make dust in air and solid constituent is retained in the various piece of electric motor 32 and motor shell 36.

In the boosting type compressor, gas is incorporated in the space on the piston 34, is compressed and discharges from exporting 27 via venting check valve 24 via inlet 25 and inhalation check valve 34, in this boosting type compressor, it is big to increase the current value of the electric motor 32 that directly is installed on the crankcase 29 that the torque ripple of each commentaries on classics becomes.

In order to overcome the shortcoming in the conventional piston gas compressor with reciprocating, the vent 35 of removing crankcase 29 is with pressurized crankcase 29 and electric motor 32.If pressurized crankcase 29 and electric motor 32, the temperature inside of crankcase 29 and electric motor 32 raises, thereby cause the bearing 35,35 of live axle 30 and bent axle 31 and the damage of Sealing 37, cause the deterioration of oil or leakage and reduce the performance and the serviceability of compressor.

Summary of the invention

In order to overcome shortcoming of the prior art, the purpose of this invention is to provide a kind of gas compressor with reciprocating piston, this gas compressor with reciprocating piston overcomes the related shortcoming of electric motor that is installed in the crankcase outside.

Description of drawings

The features and advantages of the present invention will be from becoming more apparent about embodiment's following explanation as shown in drawings, in these accompanying drawings:

Fig. 1 is the vertical cross section that illustrates according to gas compressor of the present invention; And

Fig. 2 is the vertical cross section of traditional gas compressor.

Embodiment

Fig. 1 is the embodiment according to gas compressor with reciprocating piston of the present invention.

In the roof 2 of cylinder 1, provide venting check valve 3, and on roof 2, form discharge chamber 5 with outlet 4.The lower end of cylinder 1 is connected on the pressurized crankcase 6.The motor shell 8 that has gas introducing hole 7 at the place, end is connected on the side of crankcase 6 via gas port 9,9.

Provide motor 10 in motor shell 8, and live axle 11 is formed with bent axle 13, this bent axle 13 is installed in the bearing 12,12 in the crankcase 6 pivotally.

The end in cylinder 1 of the piston rod 15 of piston 14 is pivotally mounted on the bent axle 13 by bearing 16.

In the internal surface of cylinder 1, be formed with gas guide groove 17.The internal communication of the lower end of gas guide groove 17 and crankcase 6.When piston 14 is in extreme lower position, the spatial communication on the piston 14 in the upper end of gas guide groove 17 and the cylinder 1, and piston 14 1 moves up, piston 14 and piston ring are with regard to the upper end of confined bed air drain.

Venting check valve 3 can be owing to the pressurized gas in the crankcase 6 not be opened, but is set to open when the gas in the space of coming by the piston 14 that moves up in the compression cylinder 1.

Move back and forth piston 14 by live axle 11.Then, usual pressure gas in the crankcase 6 or pressurized gas N for example ₂Be transferred to space on the piston 14 via gas guide groove 17, be compressed and discharge via venting check valve 3 and tap hole 4.

Replace gas guide groove 17, breather check valve can be used for piston 14.

Above only relate to one embodiment of the present of invention.Those skilled in the art can make various changes and improvements under the situation of the scope that does not depart from claim.

Claims

1. gas compressor with reciprocating piston comprises:

Electric motor;

Motor shell, motor shell comprise this electric motor, and have gas introducing hole, introduce hole by this gas and introduce gas from the outside;

Live axle, this live axle be by described electrical motor driven, and extend in motor shell;

Bent axle, this bent axle one is connected on the live axle;

Crankcase, this crankcase comprises described bent axle, and has gas port and be communicated with crankcase to allow motor shell;

Piston, this piston is moved back and forth by described bent axle; With

Cylinder, this cylinder comprises described piston, and in the bottom in interior week, has gas guide groove, when piston is in lower position, to allow the spatial communication on the piston in crankcase and the cylinder, make and the gas in the crankcase to be directed in the described space by the gas guide groove between the interior week of the periphery of piston and cylinder, when piston moved up, the upper end of gas guide groove was closed, and made that the gas in the space on the piston is compressed and discharges from cylinder.

2. according to the gas compressor with reciprocating piston of claim 1, wherein gas is discharged by the venting check valve in the cylinder wall.