CN2207482Y - Piston arranged with automatic-sealing open clearance combined air ring - Google Patents

Abstract

The utility model discloses a piston provided with an automatic-sealing end open clearance combined air ring, which makes an engine have good sealing performance. The utility model has the main structure that the upper end part of a piston body (4) is provided with an air ring groove (2) and an oil ring groove (3), a piston ring (5) and a piston ring (6) which are mutually superposed are arranged in each air ring groove (2), the openings (7) and (8) of the ends of the piston ring (5) and the piston ring (6) are inclined planes which form a certain angle with the horizontal plane of a ring, the directions of the cuts of the inclined planes of the piston ring (5) and th piston ring (6) are opposite, and a combined oil ring which is composed of two pieces of flat oil rings (9) and flower curve ring (10) arranged in flat oil rings (9) is arranged in the oil ring groove (3). The utility model is convenient to save oil material, enhances machine efficiency, prolongs service life and reduces waste gas pollution.

Description

Piston arranged with automatic-sealing open clearance combined air ring

The utility model relates to the piston structure of internal-combustion engine or gas compressor.

The traditional internal-combustion engine and the piston of gas compressor and piston ring are a groove one ring type structure, and in actual application, because wearing and tearing constantly increase the piston ring groove end gap, so that air leakage increases, power descends, and oil consumption increases.In order to improve sealing, often adopt the multiple tracks compression; But the increase of annular groove number makes that piston is elongated to be increased the weight of, and has increased materials consumption thus and inertial force is increased; In recent years a groove two ring structures of Chu Xianing, because the ring end gap is the shape of straight end face, be easy under gas pressure, make two ring end gap alignment and cause gas leakage, and do not have corresponding oil ring groove to cooperate, practicable gas-proof piston product therefore up to the present really occurs.

The purpose of this utility model is, designs a kind of piston that automatic closed end opened gap combined gas ring is housed, and can effectively realize cylinder seal and is difficult for gas leakage, thereby save oil plant, improve gear efficiency, increase the service life.

The technical solution of the utility model is, it comprises piston body, its structural feature is, compression is arranged at top, institute piston body upper end, the piston body of compression bottom is provided with oil ring groove one, two piston rings that are superimposed with each other are housed in the described compression, and the end opening of these two piston rings is shaped as and ring body horizontal plane inclined-plane at angle, place the opening direction on end opening inclined-plane of two piston rings of described compression opposite, be equipped with in the described oil ring groove by two flat oil rings and the combined oil ring that places the curled ring between these two flat oil rings to form.

Make below in conjunction with accompanying drawing and to further specify.

Description of drawings: Fig. 1 is the piston profile structure, and Fig. 2 places two piston rings of same compression to divide body structure, and Fig. 3 is piston ring shown in Figure 2 situation when superimposed, and Fig. 4 is that combined oil ring divides body structure.In the drawings:

The 1-piston head, the 4-piston body,

The 2-compression, 5, the 6-piston ring,

The 3-oil ring groove, 7, the 8-end opening,

The 9-flat oil ring, the 10-curled ring.

By accompanying drawing as can be known, the utility model comprises piston body (4), its design feature is, there is compression (2) piston body (4) upper end (being that top (1) is following), this compression (2) can be one or two roads, on the piston body of compression (2) bottom oil ring groove (3) is arranged, two piston rings that are superimposed with each other (5) (6) (referring to that per one compression is equipped with two piston rings) are housed in the compression (2), and the end opening of these two piston rings (7) (8) be shaped as shown in Figure 2 with the ring body horizontal plane inclined-plane (also can be regarded as its end opening gap is an angular cut) of (usually this angle value in 30 °～45 ° scopes) at angle, and place the opening direction opposite (referring to Fig. 3) on end opening (7) (8) inclined-plane of two piston rings (5) (6) of a compression, be equipped with in the described oil ring groove (3) by two flat oil rings (9) and the compound oil ring that places the curled ring (10) between these two flat oil rings (9) to form. In other words, this compound oil ring is stacked by two flat oil rings (9) curled rings of clamping (10) and forms, and it is the structure of prior art.

The utility model design principle is, described piston ring is under the gas pressure effect, because of the ramp structure of end opening, the end opening of its two piston rings (inclined plane shape) can not align (opening that is the two can not be on the same bus of cylinder of piston body), makes ring end opening leakage path Area reduces and the end opening gap can be closed under gas pressure, and cylinder leakage tester amount and frictional force are reduced, and the favourable engine performance of improving supports the use with described compound oil ring, makes the service behaviour of whole piston obtain Reliable guarantee.

As known from the above; the utility model is a kind of piston that the combined gas ring (being piston ring) in self-closed end opening gap is housed; can effectively realize the cylinder excellent sealing and make it to be difficult for gas leakage; thereby the purpose that reach fuel-economizing, improves machine efficiency, increases the service life also helps protection of the environment and is not subjected to exhaust emission. This piston structure can be applicable in internal combustion engine and the aerostatic press.

Embodiment: according to this device of accompanying drawing and said structure, be used for " liberating 141 types " motor, 100 millimeters of piston diameters, apart from 7 millimeters places of end face compression (2) is set and establishes (the two 6 millimeters of twice altogether apart, groove (2) width and radial depth are respectively 3.6 millimeters and 5 millimeters, establish oil ring groove (3) for (2) 4.5 millimeters apart from groove, its width is 5 millimeters, end opening gap corresponding to the piston ring (5) (6) of groove (2) is 0.33～0.4 millimeter, and the sideshake between piston ring (5) (6) and the piston body (4) is 0.03～0.036 millimeter.

Claims (3)

1, a kind of piston that automatic closed end opened gap combined gas ring is housed, comprise piston body (4), it is characterized in that, there is compression (2) piston body (4) upper end portion, one oil ring groove (3) arranged at this groove (2) bottom, being shaped as and ring body horizontal plane inclined-plane at angle of two piston rings that are superimposed with each other (5) (6) and its end opening (7) (8) is housed in the described compression (2), place the opening direction on end opening (7) (8) inclined-plane of two piston rings (5) (6) of compression (2) opposite, be equipped with in the oil ring groove (3) by two flat oil rings (9) and the combined oil ring that places curled ring (10) therebetween to form.

2, the piston that automatic closed end opened gap combined gas ring is housed according to claim 1 is characterized in that described compression (2) is one or two roads.

3, the piston that automatic closed end opened gap combined gas ring is housed according to claim 1 is characterized in that, described piston ring (5) (6) end opening (7) (8) is 30 °～45 ° with the scope of ring body horizontal plane angulation.

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