CN203114448U

CN203114448U - Piston ring capable of avoiding scuffing of cylinder bore

Info

Publication number: CN203114448U
Application number: CN 201320010179
Authority: CN
Inventors: 王洋; 肖明雅
Original assignee: Anhui Quanchai Engine Co Ltd
Current assignee: Anhui Quanchai Engine Co Ltd
Priority date: 2013-01-09
Filing date: 2013-01-09
Publication date: 2013-08-07
Anticipated expiration: 2023-01-09

Abstract

The utility model provides a piston ring capable of avoiding scuffing of a cylinder bore. An upper gas ring groove which is provided with an upper gas ring, a middle gas ring groove which is provided with a middle gas ring and an oil ring groove which is provided with an oil ring are manufactured in a piston body. The axis of a piston pin hole is deviated from the axis of a piston by 0.5-1 millimeter. The piston ring is capable of effectively avoiding 'scuffing of the cylinder bore'.

Description

Can prevent the piston ring of scuffing of cylinder bore

Technical field

The utility model relates to the piston ring of diesel engine, specifically can prevent the piston ring of scuffing of cylinder bore.

Background technique

The piston ring, particularly top piston ring of existing diesel engine institute adapted, the trapezoidal angle that adopts is generally 12 ° now, and the area of contact between piston ring working surface and casing wall is little.When piston stroking upward, piston ring can not play good cloth oil effect; Can not reduce the friction between piston ring and the casing wall well, increase " scuffing of cylinder bore " risk.Therefore, " scuffing of cylinder bore " phenomenon appears easily.The consequence of " scuffing of cylinder bore ", gently then because gas leakage influences power, heavy then make cylinder sleeve scrap.

Summary of the invention

The purpose of this utility model is a kind of novel piston ring of design, makes piston when operation, and piston ring is not prone to " scuffing of cylinder bore " phenomenon.

The utility model is to realize purpose of design like this.

Process compression 3, middle compression 5 and oil ring groove 7 at piston body 1; Make that trapezoidal side 11 and the angle between the trapezoidal bottom surface 12 of going up compression 3 are 15 °; Middle compression 5 adopts rectangular configuration; Oil ring groove 7 outer rings increase dovetail groove, and inner ring adopts rectangular configuration.The last compression ring made from spheroidal graphite cast iron KV1 2, the angle that is processed between upper side 8 and the bottom surface 10 is 15 °, and cylindrical working surface 9 embedded chrome platings are installed in the compression 3 then.

The middle compression ring made from special cast iron F14 4, be processed into circumscribed twist type ring; After middle compression ring working surface 14 phosphatizations are handled, be installed in the middle compression 5.Oil ring working surface 15 chromium plating of the oil ring made from alloy cast iron material 6, the remaining surface phosphatization is installed in the oil ring groove 7 after handling.Centered by piston axis, piston pin hole axis 16 and the piston axis 13 0.5-1 mm that setovers in the direction of the clock.

From the stressed of piston and characteristics of motion analysis, motor of the present utility model is when work, and the size and Orientation that acts on side pressure on the piston all constantly changes.When being slided along cylinder wall, piston produces transverse shakiness.Particularly near compression stroke terminal point and working stroke initial point, can not form piston to the violent bump of cylinder wall because of the flip-flop of side pressure direction.

Because with piston pin hole axis 16 and piston axis biasing 0.6mm, so in the piston arrives budc, in cylinder, produced deflection under the gas pressure effect before this, little by little changed into by the main thrust face by inferior thrust face and be adjacent to cylinder wall, thereby subdue piston to the bouncing of cylinder, increase the durability of piston.Reduce the collision between piston and casing wall, thereby reduce the scuffing of cylinder bore risk.

The utility model because the trapezoidal angle of employing is 15 ° last compression ring 2, can better play the effect of sealing and cloth oil, frizing, reduces the wearing and tearing between cylinder sleeve and piston ring, reduces the scuffing of cylinder bore risk, reduces consumption of lubricating oil, improves emission effect.

Description of drawings

Fig. 1 is compression 3, middle compression 5 and oil ring groove 7 structural representations gone up of the present utility model.

Fig. 2 is piston body 1 schematic representation.

Fig. 3 is last compression ring 2 structural representations.

Fig. 4 is middle compression ring 4 structural representations.

Fig. 5 is oil ring 6 structural representations.

Fig. 6 is that piston pin hole axis 16 concerns schematic representation with piston axis 13 positions.

Embodiment

Below in conjunction with accompanying drawing, a non-limiting examples is illustrated.

Referring to Fig. 1: 3 is last compression, and 5 is middle compression, and 7 is oil ring groove, and 11 is the trapezoidal side of

last compression

3, and 12 is the trapezoidal bottom surface of last compression 3.

Referring to Fig. 3: 2 is last compression ring, and 8 is the upper side of last compression ring, and 9 is the cylindrical working surface of last compression ring, and 10 is the bottom surface of last compression ring.

Referring to Fig. 4: 4 is middle compression ring, and 14 is middle compression ring working surface.

Referring to Fig. 5: 6 is oil ring, and 15 is the oil ring working surface.

Referring to Fig. 6: 13 is piston axis, and 16 is the piston pin hole axis.

The utility model can play the effect of sealing and cloth oil, frizing better, reduces the wearing and tearing between cylinder sleeve and piston ring, reduces " scuffing of cylinder bore " risk, reduces engine oil consumption, improves and discharges.

Claims

1. can prevent the piston ring of scuffing of cylinder bore, it is characterized in that: be processed with compression (3) at piston body (1), compression ring (2) is installed; Be processed with middle compression (5), middle compression ring (4) is installed; Be processed with oil ring groove (7), oil ring (6) is installed.

2. the piston ring that can prevent scuffing of cylinder bore according to claim 1 is characterized in that: going up the trapezoidal side (11) of compression (3) and the angle between trapezoidal bottom surface (12) is 15 °; Middle compression (5) adopts rectangular configuration; Oil ring groove (7) outer ring increases dovetail groove, and inner ring adopts rectangular configuration.

3. the piston ring that can prevent scuffing of cylinder bore according to claim 1 is characterized in that: the upper side (8) of the last compression ring made from spheroidal graphite cast iron KV1 (2) and the angle between bottom surface (10) are 15 °, cylindrical working surface (9) embedded chrome plating; The middle compression ring made from special cast iron F14 (4) is circumscribed twist type ring, and middle compression ring working surface (14) is handled through phosphatization; Oil ring working surface (15) chromium plating of the oil ring made from alloy cast iron material (6), the remaining surface phosphatization is handled.

4. the piston ring that can prevent scuffing of cylinder bore according to claim 1 is characterized in that: centered by piston axis, and piston pin hole axis (16) and piston axis (13) the 0.5-1 mm that setovers in the direction of the clock.