Piston ring structure
By designing the staggered outer circular milling groove and sheet ring structure, the problems of oil suction and air leakage during the suction stroke of the diesel engine are solved, which significantly reduces the oil consumption and air leakage, and achieves better engine thermal management.
Patent Information
- Application Number
- CN202421027238.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-05-13
AI Technical Summary
During the intake stroke of diesel engine, the oil is suctioned and raised due to high negative pressure, resulting in an increase in oil consumption. The prior art is difficult to effectively solve the problem of the oil flowing through the piston ring closed gap.
A piston ring structure is designed, including the arrangement of outer circular milling slots and openings on the main body ring and sheet ring, and the positions of both are staggered by 180° to adapt to the width and depth of outer circular milling slots and sheet rings to prevent oil Run up through the piston ring closed opening gap.
It effectively reduces the engine oil consumption and air leakage, especially under negative pressure conditions, which significantly reduces the engine oil consumption and air leakage, which proves the effectiveness of the new piston ring structure.
Smart Images
Figure CN222162769U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to a piston ring structure. Background Art
[0002] With the continuous increase in emission requirements, engine thermal management is becoming more and more important. The temperature required for post-treatment under different working conditions is obtained to ensure that the post-treatment can work normally under some special working conditions and the engine meets the emission requirements. The design of the piston ring group usually only considers the three strokes of compression, power and exhaust among the four strokes, but almost does not consider the intake stroke. The reason is that the intake stroke has almost no effect on the engine's leakage and oil consumption. However, the application of the intake throttle on the diesel engine leads to the generation of high negative pressure in the engine, which further causes the oil to be sucked back and rushed up during the intake stroke, resulting in a significant increase in oil consumption. The engine factory and the piston ring factory have done a lot of work around this problem, further reducing the problem of oil back-sucking and rushing up under negative pressure, but due to the existence of the piston ring closed gap, the oil still rushes up through the ring closed gap. Therefore, it is necessary to develop a new type of piston ring structure. Utility Model Content
[0003] Purpose of the utility model: To solve the above problems, the utility model provides a piston ring structure, which solves the problem of engine oil rising through the closed gap of the piston ring.
[0004] Technical solution: To achieve the above-mentioned purpose, the piston ring structure described in the utility model includes a main ring with an outer circle milling groove and a thin sheet ring fitting the outer circle milling groove, the main ring is provided with a first opening, the thin sheet ring is provided with a second opening, and the positions of the first opening and the second opening are staggered.
[0005] Furthermore, the outer circular milling groove is arranged at the edge of the main body ring.
[0006] Furthermore, the width of the outer circle milling groove is adapted to the width of the thin-sheet ring.
[0007] Furthermore, the first opening and the second opening are staggered by 180°.
[0008] Furthermore, the depth of the outer circle milling groove is adapted to the thickness of the thin-sheet ring.
[0009] Beneficial effects: Compared with the prior art, the utility model has the following significant effects: by installing the thin-sheet ring into the milled groove of the outer circle of the main ring and staggering the two openings by 180°, it prevents the engine oil from rising and leaking through the closed gap of the piston ring, and at the same time reduces the amount of leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic back view of the three-dimensional structure of the utility model.
[0011] Figure 2 It is a front schematic diagram of the three-dimensional structure of the utility model.
[0012] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the utility model.
[0013] Figure 4 It is a front view of the main body ring, the thin sheet ring and the combined structure of the main body ring and the thin sheet ring of the utility model.
[0014] Figure 5 This is a schematic diagram of the actual placement of the utility model. DETAILED DESCRIPTION
[0015] The utility model discloses a piston ring structure. Figures 1 to 5 As shown, the piston ring structure provided by the utility model is further described in detail below: the piston ring structure includes a main ring 1 with an outer circular milling groove 3, and a thin sheet ring 2 that fits the outer circular milling groove 3, wherein the main ring 1 is provided with a first opening 4, and the thin sheet ring 2 is provided with a second opening 5, the first opening 4 and the second opening 5 are staggered by 180°, the outer circular milling groove 3 is provided at the edge of the main ring 1, and the width and thickness of the outer circular milling groove 3 are respectively adapted to the width and thickness of the thin sheet ring 2, that is, the outer circular milling groove 3 has the same diameter as the thin sheet ring 2. The piston ring structure is applied to a certain national VI diesel engine, and a 1000-hour loading verification is carried out. Without changing the first ring and the oil ring, the second ring adopts the piston structure, and the full-speed full-load test engine oil consumption is 0.03% (no obvious change), when the negative pressure is -60Kpa, the engine oil consumption is 0.055% (decreased by about 70%), and the air leakage is reduced by 15%. The piston ring structure was applied to a certain National VI gas engine and was verified for 1,000 hours. When the oil ring remained unchanged, the first and second rings adopted this piston structure. The oil consumption of the full-speed and full-load test engine was 0.034% (no significant change). When the negative pressure was -65Kpa, the oil consumption was 0.05% (a decrease of about 60%), and the air leakage decreased by 8%. The piston ring structure prevents the oil from rising and leaking through the closed gap of the piston ring, and reduces the air leakage.
Claims
1. A piston ring structure, characterized in that: The invention comprises a main body ring (1) provided with an outer circular milling groove (3) and a thin sheet ring (2) fitted with the outer circular milling groove (3); the main body ring (1) is provided with a first opening (4), the thin sheet ring (2) is provided with a second opening (5), and the first opening (4) and the second opening (5) are staggered in position.
2. The piston ring structure according to claim 1, characterized in that: The outer circular milling groove (3) is arranged at the edge of the main body ring (1).
3. The piston ring structure according to claim 1, characterized in that: The width of the outer circular milling groove (3) is adapted to the width of the thin-film ring (2).
4. The piston ring structure according to claim 1, characterized in that: The first opening (4) and the second opening (5) are staggered by 180°.
5. The piston ring structure according to claim 1, characterized in that: The depth of the outer circular milling groove (3) is adapted to the thickness of the thin-film ring (2).