CN201144738Y - Piston and piston ring assembly - Google Patents

Abstract

The utility model discloses a piston and a piston ring component, and belongs to the sealing device of the internal combustion engine. The piston and the piston ring component comprise a piston and a piston ring. In the structure, the piston is provided with a gas ring groove and an oil ring groove; an upper gas ring and a lower gas ring are arranged in the gas ring groove which are served as two piston rings; an oil ring is arranged in the oil ring groove; the upper gas ring and the lower gas ring are provided with a ladder-like opening on the plane; and the oil ring is provided with a slope type lap opening. The piston and the piston ring component effectively improve the sealing performance inside the cylinder, have the prolonged service life, and are suitable for small gasoline engines.

Description

Piston and piston-ring packing

Technical field

The utility model belongs to the seal arrangement of internal-combustion engine, particularly piston and piston-ring packing.

Background technique

Piston and piston-ring packing are the important seal arrangements of internal-combustion engine, usually on the piston of compact internal combustion engine three road piston ring grooves are arranged, wherein twice compression, one oil ring groove, the opening of used piston ring is straight mouthful, though each piston ring staggers the direction of opening mutually when mounted, but gas leakage is still arranged, and the pressure in the cylinder is generally at 9-10Kg/cm ², for keep cylinder pressure need be after piston ring scuffing rering more.

The model utility content

In order to overcome the relatively poor deficiency of existing piston and piston-ring packing sealing, the purpose of this utility model provides a kind of piston and piston-ring packing, and this piston and piston-ring packing can improve sealability, prolong the working life of piston and piston-ring packing.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of piston and piston-ring packing, comprise piston, piston ring, it is characterized in that: one compression arranged on the described piston with oil ring groove, compression ring, two piston rings of lower air ring are housed in the compression, an oil ring is housed in the oil ring groove.

The described opening of going up compression ring, lower air ring is an opening stepped on its plane.

The opening of described oil ring is sloping formula overlap joint opening.

Because the utility model will be gone up lower air ring and be installed in one piston ring groove, an oil ring is housed in the oil ring groove, and make the opening of compression ring into stepped opening, the opening of oil ring is sloping formula overlap joint opening, this structure effectively raises sealing, border entrucking application test factually, cylinder pressure is by 9-10Kg/cm ²Bring up to 11-12Kg/cm ², and the cylinder that do not expand, the piston ring replacement cycle is brought up to ten thousand kilometers of 15-20 by travelling 100,000 kilometers, and fuel consumption per hundred kilometers reduces 5-10%.

The beneficial effects of the utility model are the sealings that effectively raise in the cylinder, have prolonged the working life of piston and piston-ring packing, are fit to put-put and use.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model,

Fig. 2 is the stereogram of compression ring among Fig. 1,

Fig. 3 is the stereogram of oil ring among Fig. 1,

Fig. 4 is an oil ring interface section partial enlarged drawing among Fig. 3.

Among the figure, 1. cylinder sleeve, 2. oil ring groove, 3. oil ring, 4. lower air ring is 5. gone up compression ring, 6. compression, 7. piston, 8. stepped opening, 9. sloping formula overlap joint opening.

Embodiment

Embodiment of the present utility model is, as shown in the figure:

Embodiment 1, and a kind of piston and piston-ring packing comprise piston 7, piston ring, it is characterized in that: one compression 6 arranged on the described piston with oil ring groove 2, compression ring 5,4 two piston rings of lower air ring are housed in the compression, an oil ring 3 is housed in the oil ring groove, assembly is installed in the cylinder liner 1.

Embodiment 2, a kind of piston and piston-ring packing, comprise piston 7, piston ring, it is characterized in that: one compression 6 arranged on the described piston with oil ring groove 2, compression ring 5,4 two piston rings of lower air ring are housed in the compression, an oil ring 3 is housed in the oil ring groove, and the opening of last compression ring, lower air ring is a stepped opening 8 stepped on its plane, and the opening of oil ring is sloping formula overlap joint opening 9.

Claims (3)

1. piston and piston-ring packing comprise piston, piston ring, it is characterized in that: one compression arranged with oil ring groove on the described piston, compression ring, two piston rings of lower air ring are housed in the compression, an oil ring is housed in the oil ring groove.

2. piston according to claim 1 and piston-ring packing is characterized in that: the described opening of going up compression ring, lower air ring is opening stepped on its plane.

3. piston according to claim 1 and piston-ring packing is characterized in that: the opening of described oil ring is sloping formula overlap joint opening.

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