CN214698091U - Surface pressure constant scraping blade ring and three-combination piston oil ring - Google Patents

Abstract

The utility model discloses a doctor-bar ring and three combination piston oil rings that face pressure is invariable, including doctor-bar ring base member, the height of doctor-bar ring base member is H, and H is 0.30 ~ 0.60mm, the outer disc of doctor-bar ring base member is by first transition circular arc section, major arc section, vertical platform section, second transition circular arc section slick and sly connecting in proper order and constitute; the first transition arc section is connected with the upper surface of the scraping ring base body, the second transition arc section is connected with the lower bottom surface of the scraping ring base body, and the vertical platform section is close to the lower bottom surface of the scraping ring base body. The utility model discloses simple structure, doctor-bar ring excircle facial height point is equipped with one section vertical platform section for doctor-bar ring and cylinder liner are the face contact, have increased area of contact, have reduced the contact surface pressure, reduce the contact wear of ring and cylinder liner, make doctor-bar ring long-time stable face pressure, are showing the machine oil consumption effect that improves the engine.

Description

Surface pressure constant scraping blade ring and three-combination piston oil ring

Technical Field

The utility model relates to a piston ring field specifically is a invariable doctor-bar ring of face pressure and three combination piston oil rings.

Background

The three-combination oil ring has the characteristics of excellent side surface sealing performance, light weight design and the like, is widely adopted, and particularly becomes the mainstream of application on a high-speed engine. The three-combination piston ring oil ring consists of an upper scraping ring, a lower scraping ring and a middle lining ring, and outward tension is provided for the scraping rings through the middle lining ring, so that the excircle of the scraping rings is always highly attached to the wall of the cylinder. When the scraper ring moves upwards, the scraper ring distributes engine oil at the bottom of the cylinder sleeve on the inner wall of the cylinder sleeve to provide lubrication for the movement of the ring set; when the scraper ring moves downwards, the redundant engine oil film on the inner wall of the cylinder is scraped, and engine oil consumption is controlled.

The outer circular surface of the doctor blade ring of the common three-combination oil ring at present adopts a symmetrical barrel surface structure, so that an upward oil distribution surface and a downward oil scraping surface have the same area, and an oil film with uniform film thickness is difficult to distribute in the whole stroke, so that the lubrication of a piston ring is not favorable. There is a prior art (publication: CN207847787U) that discloses a blade ring with a structure deviating from the barrel surface, which solves the problem of oil distribution to some extent, but at the beginning of running-in, the contact position of the blade ring with the cylinder is the vertex of the blade, so that the contact surface pressure formed by the very small contact surface is very large, which has 2 disadvantages: (1) when an engine is abraded in the initial stage, the surfaces of the scraping ring and the cylinder sleeve are quite rough, oil scraping on the cylinder wall is very clean due to the overlarge surface pressure of the oil scraping ring, lubrication between the ring and the cylinder sleeve is not smooth, rapid abrasion between the ring and the cylinder sleeve is caused, and even the phenomenon of pulling damage of the cylinder sleeve is caused; (2) because the contact surface presses too big, wearing and tearing aggravation causes the summit of scraping the piece ring just to be worn flat very fast, and the summit grinds the contact surface grow gradually of back scraping piece ring and cylinder liner, causes the contact surface to press to reduce gradually, causes the face to press undulant big, and is unfavorable to the frizing of scraping the piece ring.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a scraper ring and three combination piston oil rings of face pressure invariant to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a constant face pressure doctor blade ring comprising: the scraper ring comprises a scraper ring base body, wherein the height of the scraper ring base body is H, the H is 0.30-0.60 mm, and the outer circular surface of the scraper ring base body is formed by smoothly connecting a first transition circular arc section, a large circular arc section, a vertical platform section and a second transition circular arc section in sequence; the first transition arc section is connected with the upper surface of the scraping ring base body, the second transition arc section is connected with the lower bottom surface of the scraping ring base body, and the vertical platform section is close to the lower bottom surface of the scraping ring base body.

As a further aspect of the present invention: the arc radius of the large arc section is R1, R1 is 1.2H-1.4H, the horizontal width of the large arc section is t1, t1 is 15-40 mu m, the height of the vertical platform section is H1, and H1 is 0.05-0.15 mm.

As a further aspect of the present invention: the small circular arc section is arranged between the vertical platform section and the second transition circular arc section, the small circular arc section is in smooth transition connection with the vertical platform section, the circular arc radius of the small circular arc section is R5, R5 is 0.1H-0.4H, the horizontal width of the small circular arc section is t2, and t2 is 1-5 mu m.

As a further aspect of the present invention: and a honing bright belt is arranged on the vertical platform section.

As a further aspect of the present invention: any one of a nitride layer, a chromium coating layer, a CrN layer, a DLC layer and a ceramic composite coating layer is arranged on the upper surface, the lower bottom surface, the outer circular surface and the inner circular surface of the scraping ring matrix.

A three-combination piston oil ring, comprising: the scraper ring comprises an I-shaped lining ring and the scraper ring arranged on the upper surface and the lower surface of the lining ring.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model adopts an asymmetric barrel surface structure, the barrel surface degree of the large arc section of the outer circular surface close to the upper surface is larger than the barrel surface degree of the outer circular surface close to the lower bottom surface section, and the top point of the barrel surface, namely the vertical platform section is deviated to the lower side surface of the scraper ring, so that the oil distribution area on the scraper ring is increased, the oil film thickness uniformity of engine oil is effectively improved, the lubricating condition is improved, and the oil scraping is facilitated; the outer circle surface high point of the scraping ring is provided with a vertical platform section, so that the scraping ring is in surface contact with the cylinder sleeve, the contact area is increased, the contact surface pressure is reduced, the contact abrasion between the ring and the cylinder sleeve is reduced, the scraping ring keeps stable surface pressure for a long time, and the effect of improving the oil consumption of an engine is remarkable; in addition, the honing bright band is arranged on the vertical platform section, and the vertical platform section is deviated to the lower side surface, so that convenience is provided for subsequent installation due to the directions of the large and small barrel surfaces of the outer circle of the equipment easily caused by the honing bright band.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a dimensional schematic of the embodiment of FIG. 1;

fig. 3 is a schematic structural diagram of an embodiment of the present invention;

FIG. 4 is a dimensional schematic of the embodiment of FIG. 2;

FIG. 5 is a schematic view of the assembly of the scraper ring.

In the figure: 1-scraper ring matrix, 2-first transition arc section, 3-large arc section, 4-vertical platform section, 5-second transition arc section, 6-inner circular surface, 7-small arc section, 8-backing ring and 9-scraper ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a doctor blade ring with a constant surface pressure includes a doctor blade ring base 1, the height of the doctor blade ring base is H, H is 0.30-0.60 mm, and an outer circumferential surface of the doctor blade ring base is formed by sequentially and smoothly connecting a first transition arc section 2, a large arc section 3, a vertical platform section 4, and a second transition arc section 5; first transition circular arc section 2 with the upper surface of scraping piece ring base member 1 links to each other, second transition circular arc section 5 with bottom surface links to each other under the scraping piece ring base member 1, vertical platform section 4 is close to bottom surface under the scraping piece ring base member 1.

Specifically, referring to fig. 1-4, the inner circular surface 6 of the blade ring base 1 is circular arc-shaped, the radius of the inner circular surface is R4, and R4 is 0.30-0.40 mm.

Specifically, referring to fig. 1 and 2, the outer circular surface of the scraper ring base 1 is formed by smoothly connecting a first transition circular arc section 2, a large circular arc section 3, a vertical platform section 4, and a second transition circular arc section 5 in sequence; the arc radius of the first arc section 2 is R2, R2 is 0.05-0.10 mm, the arc radius of the second transition arc section 5 is R3, and R3 is 0.05-0.12 mm; the arc radius of the large arc section 3 is R1, R1 is 1.2H-1.4H, the horizontal width of the large arc section is t1, t1 is 15-40 μm, the height of the vertical platform section 4 is H1, H1 is 0.05-0.15 mm, the distance from the midpoint of the vertical platform section 4 to the lower bottom surface of the scraper ring base body 1 is H2, H2 is 0.2H-0.3H, the distance from the position where the large arc section 3 is connected with the first transition arc section 2 to the lower bottom surface of the scraper ring base body 1 is H3, and H3 is 0.65H-0.75H; be provided with the honing bright band on vertical platform section 4, because vertical platform section 4 is partial to the downside, through the direction of the big or small bucket face of the very easy equipment excircle in honing bright band, provide convenience for follow-up installation. Vertical platform section 4 is close to the lower bottom surface of doctor-blade ring base member 1, therefore make the bucket face degree of major arc section 3 great, the downside of the bucket face summit deviation doctor-blade ring of outer disc, make doctor-blade ring go upward the increase of oil distribution area, the oil film thickness homogeneity of machine oil has effectively been promoted, the lubrication condition has been improved, and the vertical platform section 4 that is equipped with, make doctor-blade ring and cylinder liner be surface contact, the area of contact has been increased, the contact surface pressure has been reduced, reduce the contact wear of ring and cylinder liner, make doctor-blade ring keep stable face pressure for a long time.

Specifically, referring to fig. 3 and 4, the outer circular surface of the blade ring base 1 is formed by smoothly connecting a first transition circular arc section 2, a large circular arc section 3, a vertical platform section 4, a small circular arc section 7 and a second transition circular arc section 5 in sequence, the small circular arc section is smoothly connected with the vertical platform section 4, the circular arc radius of the small circular arc section 7 is R5, R5 is 0.1H to 0.4H, the horizontal width of the small circular arc section is t2, t2 is 1 μm to 5 μm, the distance from the position where the small circular arc section is connected with the vertical platform section 4 to the bottom surface of the blade ring base 1 is H4, and H4 is 0.15H to 0.25H; the small arc section 7 is added, the bucket surface degree of the small arc section 7 is smaller than that of the large arc section 3, compared with a traditional scraping ring, the bucket surface cambered surface on the lower side of the outer circular surface is shorter, and oil scraping is facilitated.

The utility model discloses a doctor-bar ring compares traditional both ends and is semicircular doctor-bar ring, and the jar wall oil film thickness after going upward the oil distribution increases more than 40%, and the frictional force of ring group reduces more than 16%, and jar wall residual oil film thickness after the oil scraping down reduces more than 24%, and machine oil consumes and reduces more than 20%, and the wearing and tearing volume of doctor-bar reduces more than 60% after the operation 500h, can find out the utility model discloses have good oil consumption that falls effect to and the effect of excellent reducing wear.

Referring to fig. 5, a three-combination piston oil ring includes an i-shaped backing ring 8, and the above-mentioned wiper rings 9 disposed on the upper and lower surfaces of the backing ring.

The utility model discloses novel structure, the operation is stable, the utility model discloses when using, like fig. 3, will the utility model discloses a two scraping ring 9 and middle backing ring 8 are put into piston oil ring groove can together.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. A constant face pressure doctor blade ring, comprising: the scraper ring comprises a scraper ring base body (1), the height of the scraper ring base body is H, the H is 0.30-0.60 mm, and the outer circular surface of the scraper ring base body is formed by smoothly connecting a first transition circular arc section (2), a large circular arc section (3), a vertical platform section (4) and a second transition circular arc section (5) in sequence; first transition circular arc section (2) with the upper surface of scraping piece ring base member (1) links to each other, second transition circular arc section (5) with bottom surface links to each other under scraping piece ring base member (1), vertical platform section (4) are close to bottom surface under scraping piece ring base member (1).

2. The doctor blade ring with constant surface pressure as claimed in claim 1, wherein the large circular arc section (3) has a circular arc radius R1, R1 ═ 1.2H to 1.4H, the horizontal width of the large circular arc section is t1, t1 ═ 15 to 40 μm, the height of the vertical platform section (4) is H1, and H1 ═ 0.05 to 0.15 mm.

3. The doctor blade ring with constant surface pressure as claimed in claim 1, further comprising a small arc section (7) disposed between the vertical platform section (4) and the second transition arc section (5), the small arc section being in smooth transition connection with the vertical platform section (4), the arc radius of the small arc section (7) being R5, R5 being 0.1H to 0.4H, the horizontal width of the small arc section being t2, and t2 being 1 μm to 5 μm.

4. A constant surface pressure doctor blade ring as claimed in claim 1, characterised in that the vertical platform section (4) is provided with honing strips.

5. A doctor blade ring with constant surface pressure according to claim 1, characterized in that the doctor blade ring base body (1) is provided on its upper, lower, outer and inner circumferential surfaces with any one of a nitride layer, a chromium plated layer, a CrN layer, a DLC layer, a ceramic composite plating layer.

6. A three-combination piston oil ring, comprising: -shaped backing ring (8), and-doctor blade ring (9) according to any of claims 1-5 arranged on the upper and lower surfaces of said backing ring.

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