Piston ring with groove, which has periodically varying forms

FIELD: machine building.

SUBSTANCE: groove is located between two portions of the working surface in relation to the cross section of the piston ring. Two working surface portion are spaced apart, being substantially spherically convex, and each has the highest point. The groove has a periodically varying depth and periodically changing the width and depth of the course number of periods changes and changes in the number of stroke width the same periods.

EFFECT: invention provides the sufficient lubrication conditions due to a more uniform distribution in the circumferential direction of the lubricating oil supplied in the groove.

12 cl, 11 dwg

 



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to production of piston ring with axial height <2 mm. Piston ring has at least one rib, radially outer working surface, radially inner peripheral surface as well as top and bottom side surfaces extending there between. Note here that appropriate rib is provided with outline conically converging radially outward. Then, working surface and side surfaces of appropriate conical rib are coated with at least one wear-proof ply. Thereafter solely side surface making the scraping edge of appropriate rib is subjected to at least partial removal of material.

EFFECT: higher reliability of piston ring.

6 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: sleeve assembly seal comprises main compression ring and extra rings fitted in piston ring grooves. Extra [-like rung has top and bottom annular flanges adjoining the piston groove ends and interconnected by lateral cylindrical plate pressed against compression ring cylindrical surface. Extra ring top flange has through slits while its butt has end horns. Besides, debending horns are made at extra ring flanges, all over its edges. Proposed device decreases gas leaks in crankcase, rules out ring pumping effects and reduces oil ageing.

EFFECT: higher engine efficiency, decreased oil consumption.

1 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: piston groove 6 accommodates top scraper 3 and bottom scraper 5 with expansion flexible split ring 4 arranged there between and provided with grooves to communicate the cavity between cylinder wall 1 and outer diameter surface of ring 4 with bottom cavity of piston groove 5. Working surfaces of scrapers 3 and 5 are shaped to remove surplus oil from cylinder wall 1 solely in down motion of piston 2 while required thickness of hydrodynamic lube layer is formed on wall of cylinder 1.

EFFECT: minimum mechanical losses and oil consumption.

3 cl, 1 dwg

Ice piston seal // 2447306

FIELD: engines and pumps.

SUBSTANCE: piston groove 8 accommodates top ring 3 and bottom ring 4. Note here that top edge of top ring 3 is located to acute angle to its bottom edge while ring larger horizontal side face the axis of cylinder 1. Oil scraper extra ring 5 is arranged under bottom ring 4. Extra ring bottom face is located to acute angle to top face. Larger vertical side of ring 5 faces the wall of cylinder 5 while clearance is arranged between top ring outer cylindrical surface and cylinder wall. Extra ring bottom face inclination is smaller than that of top ring top face. Groove is made under extra ring bottom face to communicate via grooves with piston inner space.

EFFECT: higher efficiency and engine output, reduced consumption of fuel and oil.

3 cl, 1 dwg

FIELD: mechanical engineering; engines.

SUBSTANCE: invention relates to oil control rings installed on pistons of internal combustion engines and compressors. Proposed oil control device of cylinder-piston group has box-section steel ring in piston groove with upper and lower scrapers whose working surfaces are made conical with vertices of cones pointed upwards and expander placed in between and made in form of split ring member with side working surface provided with barrel-shape projections in contact with cylinder surface. height of projections is not less than clearance between cylinder and piston. Lower scraper of ring is made tilted on form of cone with vertex pointed upwards. Periodical round or oval holes are made over circumference of mating of lower tilted scraper and vertical wall of ring. Longitudinal axes of oval holes should be located over circumference of axis of mating.

EFFECT: reduced oil burning losses owing to provision of effective removal of excess oil from surface of cylinder.

4 dwg

The invention relates to a compressor engineering and can be used in compressors with dry-running

The invention relates to mechanical engineering, in particular to the structures of parts of internal combustion engines, and can be used for compressors

Piston seal // 2046227

The invention relates to a sealing technique and can be used for sealing pistons and mechanisms

Piston seal // 2037705

FIELD: mechanical engineering; engines.

SUBSTANCE: invention relates to oil control rings installed on pistons of internal combustion engines and compressors. Proposed oil control device of cylinder-piston group has box-section steel ring in piston groove with upper and lower scrapers whose working surfaces are made conical with vertices of cones pointed upwards and expander placed in between and made in form of split ring member with side working surface provided with barrel-shape projections in contact with cylinder surface. height of projections is not less than clearance between cylinder and piston. Lower scraper of ring is made tilted on form of cone with vertex pointed upwards. Periodical round or oval holes are made over circumference of mating of lower tilted scraper and vertical wall of ring. Longitudinal axes of oval holes should be located over circumference of axis of mating.

EFFECT: reduced oil burning losses owing to provision of effective removal of excess oil from surface of cylinder.

4 dwg

Ice piston seal // 2447306

FIELD: engines and pumps.

SUBSTANCE: piston groove 8 accommodates top ring 3 and bottom ring 4. Note here that top edge of top ring 3 is located to acute angle to its bottom edge while ring larger horizontal side face the axis of cylinder 1. Oil scraper extra ring 5 is arranged under bottom ring 4. Extra ring bottom face is located to acute angle to top face. Larger vertical side of ring 5 faces the wall of cylinder 5 while clearance is arranged between top ring outer cylindrical surface and cylinder wall. Extra ring bottom face inclination is smaller than that of top ring top face. Groove is made under extra ring bottom face to communicate via grooves with piston inner space.

EFFECT: higher efficiency and engine output, reduced consumption of fuel and oil.

3 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: piston groove 6 accommodates top scraper 3 and bottom scraper 5 with expansion flexible split ring 4 arranged there between and provided with grooves to communicate the cavity between cylinder wall 1 and outer diameter surface of ring 4 with bottom cavity of piston groove 5. Working surfaces of scrapers 3 and 5 are shaped to remove surplus oil from cylinder wall 1 solely in down motion of piston 2 while required thickness of hydrodynamic lube layer is formed on wall of cylinder 1.

EFFECT: minimum mechanical losses and oil consumption.

3 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: sleeve assembly seal comprises main compression ring and extra rings fitted in piston ring grooves. Extra [-like rung has top and bottom annular flanges adjoining the piston groove ends and interconnected by lateral cylindrical plate pressed against compression ring cylindrical surface. Extra ring top flange has through slits while its butt has end horns. Besides, debending horns are made at extra ring flanges, all over its edges. Proposed device decreases gas leaks in crankcase, rules out ring pumping effects and reduces oil ageing.

EFFECT: higher engine efficiency, decreased oil consumption.

1 cl, 6 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of piston ring with axial height <2 mm. Piston ring has at least one rib, radially outer working surface, radially inner peripheral surface as well as top and bottom side surfaces extending there between. Note here that appropriate rib is provided with outline conically converging radially outward. Then, working surface and side surfaces of appropriate conical rib are coated with at least one wear-proof ply. Thereafter solely side surface making the scraping edge of appropriate rib is subjected to at least partial removal of material.

EFFECT: higher reliability of piston ring.

6 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: sealing assembly of piston engine is intended for internal combustion engine with sealed working chamber (3) of variable volume. Assembly contains open sealing ring shaped in the form of annular flange (8) with sealing surface (9), and connected with it bushing (10) with outer cylindrical surface which is in contact with the sealing surface of engine cylinder (1), and device limiting displacement of the sealing assembly relative to piston (2) in direction of its longitudinal axis (7). Assembly is provided with closed continuous shielding element (5) with screening annular flange (6) located on the side surface of annular flange (8) of sealing ring, closest to sealed working chamber (3) of the engine. Screening annular flange (6) has external diameter exceeding internal diameter of sealing ring bushing (10).

EFFECT: technical result consists in improvement of engine capacity gas density upon increased reliability of sealing operation and reduced thermal tension of the piston.

7 cl, 10 dwg

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engines. The piston unit comprises an internal combustion engine piston ring (3) and the scraper ring (4), located in the piston bore (5). The scraper ring (4) is located under the compression ring (3). The total height of the compression and oil scraper rings (3), (4) is not less than their radial thickness. The gap in the oil ring lock (4) is located at 180 concerning the gap in the lock compression ring (3). The clearance between the compression surfaces of the inner diameters of rings and oil scraper (3). (4) and the bottom of the piston bore (5) is equal to the gap between the piston (2) and the cylinder wall (1). The embodiments of the piston unit are disclosed.

EFFECT: invention provides the removal of the gas-dynamic losses and improves the heat transfer between the piston head and the cylinder.

7 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention relates to the piston ring (1), which has an outer working surface (3), two lateral sides (5, 6) and an inner circumferential surface (7). The working surface (3) is profiled. Profile of the working surface is substantially spherically convex and has a highest point (B1). The axial position of the highest point (B1) is changed periodically in a circumferential direction.

EFFECT: invention provides carrier mirror lubricating oil, evenly distributed over the circumferential surface of the piston.

7 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: groove is located between two portions of the working surface in relation to the cross section of the piston ring. Two working surface portion are spaced apart, being substantially spherically convex, and each has the highest point. The groove has a periodically varying depth and periodically changing the width and depth of the course number of periods changes and changes in the number of stroke width the same periods.

EFFECT: invention provides the sufficient lubrication conditions due to a more uniform distribution in the circumferential direction of the lubricating oil supplied in the groove.

12 cl, 11 dwg

Up!