CN2871984Y - Double-slotted piston - Google Patents

Abstract

The utility model discloses a piston of two grooves, relating to a technical scope of four-stoke combustible engine and air compressor, which is an improvement to the current piston of three ring grooves. As a whole, the model comprises a piston body (1), an air ring (5) and a skirt (7), and two oil rings (6). The piston is arranged with two ring grooves, of which the lower wall is designed with a plurality of oil holes of a channel form. The air ring and the skirt and the oil ring are arranged in a wider groove and the other oil ring in a narrower groove. An air escaping gap has an inclined angle with the surface of the air ring. Two rings in the wider groove are mutually supplementary. The ''inclined'' design of the air spring seal for the air escaping and use of the skirt can substantially increase the sealed air quantity and lengthen the period of usage of the rings. Special designs of the oil hole of channel form and the oil ring can improve the performance of the oil ring and extend the period of usage.

Description

Two groove pistons

Affiliated technical field

The utility model relates to quartastroke engine and air compressor technical field, is specifically related to a kind of novel two groove pistons.

Technical background

The piston that uses in various quartastroke engines and air compressor generally adopts the structure of three annular grooves, the twice compression ring is installed with oil ring respectively, the collar extension of compression ring (air leak) is vertical design with anchor ring, increase along with wear extent, its air leakage is just big more, and envelope gas ability reduces gradually.

Summary of the invention

In order to reduce the air leakage of piston, improve the working life of ring, the utility model has designed a kind of novel two groove pistons.

Its technical solution is: integral body is made up of piston body, compression ring and grommet thereof and two oil rings, piston body is provided with two annular grooves, sipes is last, narrow groove is following, and the lower wall of two grooves is equipped with some flute profile oilholes, leads to piston body inside, from top to bottom adorning compression ring and an oil ring in the sipes respectively, grommet is located at the compression ring inboard, and the air leak of compression ring (being the collar extension of compression ring) presents an inclination angle with the compression ring surface, and another oil ring places in the narrow groove.

After adopting above structure, the utlity model has following beneficial effect:

One, dicyclo complementation in the sipes, the inclined design of compression ring gas leakage envelope and the use of grommet can increase envelope tolerance greatly, increase the service life; Two, the particular design of flute profile oilhole and oil ring can improve the using effect of oil ring, increases the service life.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further details:

Fig. 1 is a plan view of the present utility model;

Fig. 2 is the composite structure schematic representation of compression ring of the present utility model and grommet thereof;

Fig. 3 is a compression ring structural drawing of the present utility model;

Fig. 4 is an oil ring structural drawing of the present utility model;

Fig. 5 is a compression ring air leak structural representation of the present utility model.

Embodiment

As shown in the figure, the utility model integral body is made up of piston body (1), compression ring (5) and grommet (7) thereof and two oil rings (6).Piston body is provided with two annular grooves, and sipes (3) is last, and narrow groove (2) is following, and the lower wall of two grooves is equipped with some flute profile oilholes (4), leads to piston body inside.A compression ring and an oil ring from top to bottom are housed respectively in the sipes, and the compression ring inboard is provided with a grommet.The compression ring two ends are provided with ring joint a (9) and ring joint b (10), and the air leak that forms between two ring joints (8) presents an inclination angle with the compression ring surface.The D-D section of oil ring is L-shaped, helps oil ring and smoothly machine oil is taken in oilhole.An oil ring only is housed in the narrow groove.The 180 degree angles of the collar extension of adjacent two rings must being staggered are installed when respectively encircling.

Claims (1)

1, a kind of two groove pistons, it is characterized in that: integral body is made up of piston body (1), compression ring (5) and grommet (7) thereof and two oil rings (6), piston body is provided with two annular grooves, and sipes (3) is last, and narrow groove (2) is following, the lower wall of two grooves is equipped with some flute profile oilholes (4), lead to piston body inside, from top to bottom adorning compression ring and an oil ring in the sipes respectively, grommet is located at the compression ring inboard, the air leak of compression ring (8) presents an inclination angle with the compression ring surface, and another oil ring places in the narrow groove.

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