CN1060557C

CN1060557C - Sealed piston ring

Info

Publication number: CN1060557C
Application number: CN96119166A
Authority: CN
Inventors: 高敦华
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-14
Filing date: 1996-10-14
Publication date: 2001-01-10
Anticipated expiration: 2016-10-14
Also published as: CN1179515A

Abstract

The present invention alters a notch which leaks gas and is arranged on the existing piston ring in a reciprocating piston engine into a closed notch in the shape of a long arc which does not leak gas and has the gas sealing function. The present invention has the advantages of advanced sealing function, less processing procedure, high yield and low production cost.

Description

Sealed piston ring

The present invention relates to a kind of piston ring.

Piston ring is a most important Sealing in the reciprocating-piston engine, but the compressed gap blow-by of existing piston ring, no matter be that various otch such as right angle incision, angular cut, stepped shaft otch are not closed, the working clearance that all keeps certain distance, this gap gas leakage causes the gap further to be expanded in the wearing and tearing, gas leakage seriously develops on the piston ring scurries under the gas, leak the energy, local temperature rise, the main leakage path of worsening condition initiating failure.

The object of the invention: with the piston ring work of always leaking gas, inc above-mentioned various otch make long arc otch such as Fig. 1 of air tight closing seam, the structure diagram of sealed piston ring in cylinder: cut closure into.Public limit otch long arc is formed inner edge point beak 4 the inside and outside ring week of cutting sth. askew respectively, the special-shaped long arc point beak that 5, two elasticity of outer rim point beak are overlapping, sharp beak sharp angle and otch, start, end right heart angle, garden θ determine by the radially long and running parameter of ring.

Fig. 2, along the otch sealing gland enlarged diagram of seal ring in the sideshake horizontal sectional drawing on the annular groove; Fig. 3 is an otch sealing gland enlarged diagram in A-A vertical cross section: ring is compressed in the annular groove of piston 7 by cylinder 6, during work, the downward pressure ring of high-pressure gas is in the annular groove bottom side, and along sideshake on the annular groove 8 enter ring back clearance 9 in encircle side pressure inner edge point beak 4 in outer rim point beak 5, the inside and outside driving fit of otch, combustion gas is not scurried down, force to compress circumferential long arc otch on the contrary, the annular groove bottom side does not have leakage, cause sealing gland, this cut closure, the piston ring that utilizes gas pressure to strengthen the closure of incisions gap function is called for short: sealed piston ring.Sealed piston ring has been got rid of the leakage path that the ring gap exists, and improves cylinder pressure, and the otch that has solved piston ring not closed breakthroughly, long-standing compressed gap sealing problem.

The feature of sealed piston ring: the long arc otch of cut closure, elasticity overlap joint and the pressurized seal that vertical incision is strengthened.Linear incision on ring week, cut into the sharp angle long arc along ring week, α＜10 °, the average arc length that the otch long arc of ring side is inclined cross inside and outside ring week start, end with the mean screw diameter of ring right heart angle, garden θ represent, the θ of different series ring does not wait, and θ is by the radial length and the decision of otch sharp angle of ring; α greatly then θ is little, and θ is if little then otch arc weak point can not closure be difficult to sealing, and the θ of sealed piston ring is preferred in ° scope of 10 °＞α＞3 by the running parameter of ring, θ＞0.6[radian].The expansion girth of sealed piston ring, all greater than the girth that encircles external diameter, having increased a length is: the footpath inner edge long arc point beak of product mutually in θ [radian] and the ring, when being used for the shortening of external diameter wearing and tearing girth, the variation of filling vacancies in the proper order girth is extended in the otch slippage, keeps otch overlap joint elastic closure to adapt to the pressurized gas sealing.

Comparative test result shows: when replacing in the motor common opened gap ring with sealed piston ring: cylinder pressure increases, and three traditional ring piston engines can be subtracted into a compression ring, the double ring piston engine of an oil ring.Subtract the ring back: cylinder pressure improves 10-15%, and fuel consumption is reduced, and has tangible sealed energy-saving effect.

Claims

1, a kind of sealed piston ring of steel, include an axial relative upper and lower surface, the otch of radially relative surface, inside and outside garden and one and a parallel sealing, it is characterized in that: cut closure, the no gap of elasticity overlap joint, otch is cut into along the ring perimeter arcs with sharp angle, is divided into the closed special-shaped long arc point beak of two elasticity overlap joints of inside and outside edge the inner and outer rings of cutting sth. askew week, public limit otch long arc changes with the otch sharp angle, otch sharp angle＜10 °

2, according to the said sealed piston ring of claim 1, the average arc length that the otch long arc start, end that it is characterized in that encircling the side are inclined cross inside and outside ring week with the mean screw diameter of ring right heart angle, garden θ represent, the θ of different series ring does not wait, θ is by the radial length and the decision of otch sharp angle of ring, α greatly then θ is little, and θ is if little then otch arc weak point can not closure be difficult to sealing.θ＞0.6[radian], according to the running parameter difference, θ is preferred in ° scope of 10 °＞α＞3.

3, it is characterized in that according to the said sealed piston ring of claim 1: the expansion girth of ring is all greater than the girth that encircles external diameter, having increased a length is: the footpath inner edge long arc point beak of product mutually in θ [radian] and the ring, when being used for the shortening of external diameter wearing and tearing girth, the otch slippage, elastic extension, fill vacancies in the proper order the variation of girth, keep the closed pressurized gas that adapt to of otch overlap joint to seal.