CN2437865Y - Compound piston ring - Google Patents

Abstract

The utility model relates to a clamped position compound piston ring which can increase the motive power of an engine, reduce fuel consumption and reduce exhaust emission. The utility model is formed by overlapping a main ring and a minor ring which are provided with notches, and the outer diameters of the main ring and the minor ring are same; the inner edge of the main ring is provided with a step, the step is provided with a groove, the inner edge of the minor ring is provided with a convex clamp, and the size of the convex clamp inosculates with the groove; when the two rings re overlapped, the convex clamp is tightly matched and clamped on the groove to position, and the notch positions of the two rings are passed. After the two rings are overlapped into a compound ring, the notches of the two rings are bridged with each other, particularly, after the cylinder body of the engine is abrased, the notches of the two rings are also bridged because of the external tension of the rings, and the oil leak and air leakage of the piston ring are decreased.

Description

Screens combined type piston ring

The utility model relates to a kind of piston ring structure, especially can reduce the inside and outside combination combined type piston ring of engine cylinder-body wearing and tearing back gas leak of the oil leakage.

At present, generally the piston ring of Shi Yonging is made up of single iron hoop, for the ease of installing, a breach is all arranged, on the pot type piston ring because breach can not seal at work, so produce a certain amount of gas leak of the oil leakage phenomenon, particularly after the engine cylinder-body wearing and tearing, because the outer tension force of piston ring strengthens breach, the airtight performance of piston ring reduces, the compression ratio of engine piston work descends, produces gas leakage, and engine power decline, oil consumption increase, tail gas pollution are increased.

The purpose of this utility model provides a kind of inside and outside combination combined type piston ring, and it can not only be convenient to install as the pot type piston ring, and can strengthen the seal of piston ring greatly.

The purpose of this utility model is achieved in that with two identical and notched main rings of external profile diameter and inner loop and is superimposed together, the main ring inner edge has a step, one groove is arranged on the step, the inner loop inner edge has a convex clip, convex clip size is coincide with groove, and the convex clip drive fit was stuck on the groove gap position with the location and the two rings that staggers when two rings was superimposed.After two rings was overlapped into composition ring, the mutual Mi of the breach of two rings closed, and making does not have breach on the whole, and especially after the engine cylinder-body wearing and tearing, because the outer tension force of ring, the still mutual Mi of the breach of two rings closes, thereby reduces the gas leak of the oil leakage of piston ring.

Owing to adopted such scheme, increased the seal of piston ring greatly, prolong its working life, and engine power increase, oil consumption decline, exhaust emissions are descended.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 main ring front view

Fig. 2 main ring left view

Fig. 3 is the I-I cross-sectional schematic of Fig. 1

Fig. 4 inner loop front view

Fig. 5 inner loop left view

1. main rings, 2. main ring inner edge steps, 3. main ring stepped recesses, 4. inner loops, 5. inner loop inner edge convex clips, 6. main ring breach, 7. inner loop breach among the figure

In Fig. 1, Fig. 2 and Fig. 3, a breach (6) is arranged on the main ring (1), a step (2) is arranged on the main ring inner edge, a groove (3) is arranged on main ring inner edge step (2), bottom portion of groove and main ring are flat.

Dotted line among Fig. 3 is represented the position of inner loop (4) relative main ring when primary and secondary ring is superimposed.

On the inner loop shown in Fig. 4 (4), a breach (7) is arranged, at the inner edge of inner loop (4) convex clip (5) is arranged, its size matches with groove on the main ring step (2), is used for that primary and secondary ring is located and the breach of the primary and secondary ring that staggers.Inner loop (4) external profile diameter is identical with main ring (1) outer rim, and the inner edge diameter is identical with the external profile diameter of main ring inner edge step (2).

Fig. 5 shows on the plane of inner loop (4) without any step.

Claims (1)

1. screens combined type piston ring, with two identical and notched main rings of external profile diameter and the inner loop composition that is superimposed together, it is characterized in that: a breach is arranged on the main ring, the main ring inner edge has a step, one groove is arranged on the step, one breach is arranged on the inner loop, and the inner loop inner edge has a convex clip, and the convex clip drive fit was stuck on the groove gap position with the location and the two rings that staggers when two rings was superimposed.