CN2225544Y

CN2225544Y - Fully sealed slide and float piston ring

Info

Publication number: CN2225544Y
Application number: CN 95241821
Authority: CN
Inventors: 刘志强
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-03
Filing date: 1995-07-03
Publication date: 1996-04-24
Anticipated expiration: 2005-07-03

Abstract

The utility model discloses a fully sealed slide and float piston ring, which can prevent an engine from blow-by and blow-by caused by abrasion. A novel star-shaped stagger and superimposed type interface is adopted, and the inner lower side of the interface uses an arc cutting groove and the arc projecting part for completing the omnibearing sealing and the sliding and floating type automatic compensation after the abrasion. The sealing performance can be ensured on an initial stage and after abrasion. The power performance and the economy of the engine can be improved, and the overhaul period can be deferred. According to the calculation for the cylinder diameter with 100 millimeters, the interstice of the interface is increased by 4 mm and the blow-by phenomenon can not occur.

Description

Hermetically sealed slide and float type piston ring

The utility model relates to a kind of reciprocating engine and piston type air compressor, the cylinder piston ring.

All adopt plane or slope surface port in the full cylinder of existing piston formula motor, and leave the piston ring of certain interval, make piston when compression and work done, produce certain air leakage, and along with the wearing and tearing opened gap can constantly increase, the motor gas blowby is increased, and power descends, and oil consumption raises.

The purpose of this utility model is, a kind of improved piston ring is provided, and it can prevent to scurry crankcase under the port gap of high-temperature high-pressure gas by piston ring effectively.And can be along with the automatic compensation of the increase slide and float type of wear extent, make it not frayed influence in the thresold size of using and keep good sealing state, effectively prolong the overhaul life of motor, improve power character and Economy.

The purpose of this utility model is implemented by following manner.

Adopt the staggered stacked step-like interface of a kind of " " shape at the interface position of rectangular cross-section piston ring, and be respectively equipped with the garden arc grooving that can coincide mutually and the projection of garden arc at the two ends of the inner underside joint of this interface.If the pressurized gas on piston top are scurried under last interface, just sealed by the piston ring of cylinder wall and interface lower half portion.When under lower interface, scurrying, then sealed by the protuberance branch of the garden arc grooving of inner underside and garden arc by the back clearance of this ring.As wearing and tearing along with this ring, the gap of last lower interface can constantly increase, but as long as the gap that is increased is no more than the limit size at staggered stacked position, the garden arc grooving and the projection of interface inner underside, will slide floating position automatically, make it still can keep good sealing state.

Below in conjunction with accompanying drawing structure of the present utility model and embodiment are explained in detail.

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

Fig. 2 is a plan view of the present utility model.

Fig. 3 is the sectional drawing of A-A among the utility model Fig. 1.

Fig. 4 is the sectional drawing of B-B among the utility model Fig. 1.

Fig. 5 is the schematic representation of the utility model when not wearing and tearing.

Fig. 6 realizes the phase diagram of sliding floating compensation after being the utility model wearing and tearing.

The feature of the present utility model that sees figures.1.and.2 is, one " " shape stacked step-like interface 1,2 that interlocks is arranged at the interface position.And a garden arc grooving 6 and a projection 7 that coincide mutually arranged respectively at the left and right two ends of inner underside interface of this interface.When interface closed up, the axial thickness after interface end 1 and 2 is interlocked equated that with other position the warp-wise thickness when arc grooving 6 and projection 7 coincide equates with other position.

With reference to Fig. 3: 1 and 2 are respectively two joints at left and right two ends among Fig. 1, Fig. 2,3 is that piston, 4 is that cylinder sleeve, 5 is the gap, back, high temperature, pressurized gas are when the gap by piston 3 and cylinder sleeve 4 enters gap 5, by interface right-hand member 2 and cylinder sleeve 4 sealings and can not scurry down.

With reference to Fig. 4: when high temperature and high pressure gas enters gap 5 by piston 3 and cylinder sleeve 4, sealed by the garden arc projection 7 of interface left end 1 and interface right-hand member 2, thereby gas can not be scurried down.

With reference to Fig. 5 and Fig. 6, obviously the utility model is after wearing and tearing, and the gap of interface obviously increases.Just left end joint 1 has floated a position with grooving 6 with right-hand member joint 2 and projection 7 relative cunnings, but its sealability is not constituted influence.

When assembling, because the utility model has good and stable sealing, but the mechanical strength of jointing significantly decreases.So this piston ring can not be used in first road, first road must be selected common flat mouthful of chrome-faced ring for use, and to guarantee the utility model under good condition, long-term and stable plays a role.Because the utility model has good and stable sealability, so the 3rd road ring just can directly assemble oil ring, every cylinder only needs three road rings like this, promptly first road is flat mouthful chrome-faced ring, second road is the utility model, the 3rd road is common oil ring, has also effectively reduced the back pressure of the first road ring simultaneously, has reduced cylinder sleeve and wearing for piston amount.

Claims

1, a kind of hermetically sealed slide and float type piston ring is characterized in that having adopted staggered splice mouthful of " " shape of a kind of being ((1), (2), and below interface interior the undercut slots (6) of the garden arc that can coincide mutually and the projection (7) of garden arc are arranged respectively.

2, piston ring according to claim 1 is characterized in that: interface left end (1) inner underside has the grooving (6) of a garden arc, and the inner underside of right-hand member (2) has a garden arc projection (7).

3, piston ring according to claim 1 is characterized in that: when closed up at the two ends of interface, the axial thickness at interface position equated that with other position jointing has its radial thickness of position of grooving and projection to equate with other position.