CN111207001A - Wet cylinder sleeve with spiral rectifying fins for engine - Google Patents
Wet cylinder sleeve with spiral rectifying fins for engine Download PDFInfo
- Publication number
- CN111207001A CN111207001A CN202010022646.5A CN202010022646A CN111207001A CN 111207001 A CN111207001 A CN 111207001A CN 202010022646 A CN202010022646 A CN 202010022646A CN 111207001 A CN111207001 A CN 111207001A
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- China
- Prior art keywords
- spiral
- wet cylinder
- engine
- cylinder sleeve
- cylinder liner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/16—Cylinder liners of wet type
Abstract
The invention relates to a wet cylinder sleeve with spiral rectifying fins for an engine, belonging to the technical field of low-temperature starting preheating and normal working heat dissipation of the engine. Spiral rectifying fins are arranged on the outer side wall surface of the wet cylinder sleeve which is in contact with the preheated water at equal intervals. The spiral rectifying rib starts from the base line of the spiral rectifying rib and extends to the finishing line of the spiral rectifying rib. The section of the spiral rectifying rib is semicircular. In the process of low-temperature starting (normal operation) of the engine, the spiral rectifying fins promote the preheating (cooling water) in the water jacket to regularly flow along the direction of the spiral fins, thereby effectively eliminating backflow or dead water areas formed by mutual interference of the preheating water flowing along different directions, improving the convection heat exchange efficiency of the preheating water, enabling the local low-temperature (high-temperature) area on the surface of the wet cylinder sleeve contacted with the backflow or dead water area to be heated (cooled) more quickly, and simultaneously effectively improving the uniformity of the surface temperature distribution of the wet cylinder sleeve.
Description
Technical Field
The invention relates to a wet cylinder sleeve with spiral rectifying fins for an engine, belonging to the technical field of low-temperature starting preheating and normal working heat dissipation of the engine.
Background
When the engine is started in a severe cold area, the air inlet temperature is low, the viscosity of oil is high, the friction resistance of each part of the engine body is high, and the starting is very difficult. Therefore, a warm-up system is required to assist the starting of the engine. In general, key parts such as the surface of the wet cylinder sleeve and the like are preheated by heating and circulating preheated water. In the process, the temperature rise speed of the wet cylinder sleeve of the engine is an important index for inspecting the performance of the preheating system. Meanwhile, the temperature difference among the cylinders needs to be well controlled, the temperature unevenness on the surface of the wet cylinder sleeve is restrained, and the fatigue damage of the engine body caused by the temperature unevenness is avoided. In a traditional engine water jacket, due to the fact that the water jacket structure is complex, preheated water flowing in different directions interferes with each other, backflow or dead water areas are easily formed in the water jacket, the heat convection efficiency between the preheated water in the areas and a wet cylinder sleeve is poor, the surface temperature of the wet cylinder sleeve is low, the surface of the wet cylinder sleeve is heated unevenly, and the starting performance of an engine is affected. Simply increasing the power of the heating device cannot fundamentally solve the above-mentioned problems under the limited conditions of volume, mass, etc. of the heating device (e.g., a warming pan) outside the engine, and even further aggravates the non-uniformity of the temperature distribution under some working conditions. In addition, when the engine normally works, the surface temperature of the wet cylinder sleeve nearby is easily overhigh due to the low heat exchange efficiency of the local area in the water jacket, the problem of uneven temperature distribution is caused, and the working state and the service life of the engine are influenced.
Disclosure of Invention
The invention aims to provide a wet cylinder sleeve with spiral rectifying fins for an engine, which improves the structure of a water jacket, improves the flowing state of preheated (cooling) water, promotes the convective heat exchange process between the preheated (cooling) water and the wet cylinder sleeve, and improves the efficiency and the performance of the engine in low-temperature starting, heating and normal working heat dissipation.
The invention provides a wet cylinder sleeve with spiral rectifying fins for an engine, wherein 2-6 spiral rectifying fins are processed on the outer surface of a wet cylinder sleeve base body at equal intervals along the circumferential direction, each spiral rectifying fin starts from a spiral rectifying fin base line and is screwed in clockwise or anticlockwise, and the spiral rectifying fins extend to the end line of the spiral rectifying fins around the outer surface of the wet cylinder sleeve base body to end, and the ratio of the outer diameter d of the wet cylinder sleeve to the thread pitch h of the spiral rectifying fins is as follows: h is 1 (1-2).
In the wet cylinder liner with the spiral rectifying fins, the cross sections of the spiral rectifying fins are semicircular, rectangular, parallelogram, trapezoid, triangle or polygon with round corners.
In the above wet cylinder liner with spiral flow-straightening fins, the wall thickness c of the wet cylinder liner2Thickness c of spiral fin1The ratio of the components is as follows: c. C2:c1＝1:(0.1-0.9)。
In the wet cylinder sleeve with the spiral rectifying fins, an x axis is defined as the axial direction of the wet cylinder sleeve, a z axis is defined as the axial direction of a crankshaft in an engine crankcase, a y axis is perpendicular to the x axis and the z axis, a positive direction is defined according to a right-hand coordinate system rule, and the included angle between a connecting line of a starting point of the spiral rectifying fins and the axial line of the wet cylinder sleeve in a y-z plane and the z axis is 0-90 degrees, namely the installation angle α of the wet cylinder sleeve.
The invention provides a wet cylinder sleeve with spiral rectifying fins for an engine, which has the advantages that:
according to the wet cylinder sleeve with the spiral rectifying fins for the engine, the flow direction of preheating (cooling) water in the cylinder sleeve is regulated through the spiral rectifying fins in the process of low-temperature starting (normal operation) of the engine, backflow or dead water areas formed by mutual interference of the preheating (cooling) water in different flow directions are effectively reduced and eliminated, the convection heat exchange efficiency of corresponding areas is improved, and an extremely low (high) temperature area is avoided from being locally formed in the cylinder sleeve. Therefore, the temperature rise (cooling) of the surface of the wet cylinder sleeve is accelerated, the surface temperature difference is reduced, and the distribution uniformity of the surface temperature of the wet cylinder sleeve in the preheating (cooling) process is improved.
Drawings
FIG. 1 is a perspective view of a wet cylinder liner with spiral flow straightening ribs for an engine according to the present invention.
FIG. 2 is a cross-sectional view A-A of the wet liner shown in FIG. 1.
In fig. 1 and 2, 1 is a wet liner base, 2 is a spiral straightening fin, 3 is a reference line of the spiral straightening fin, and 4 is a finish line of the spiral straightening fin.
Detailed Description
The invention provides a wet cylinder sleeve with spiral rectifying fins for an engine, which is structurally shown in figure 1, wherein 2-6 spiral rectifying fins 2 are machined on the outer surface of a wet cylinder sleeve base body 1 at equal intervals along the circumferential direction, each spiral rectifying fin 2 starts from a spiral rectifying fin base line 3, and is screwed in clockwise or anticlockwise, and extends to a spiral rectifying fin terminal line 4 around the outer surface of the wet cylinder sleeve base body, and the ratio of the outer diameter d of the wet cylinder sleeve to the thread pitch h of the spiral rectifying fins is as follows: h is 1 (1-2).
In the wet cylinder sleeve with the spiral rectifying fins, the cross sections of the spiral rectifying fins are semicircular, rectangular, parallelogram, trapezoid, triangle or polygon with round corners.
The thickness c of the wet cylinder sleeve of the engine with the spiral rectifying fins2Thickness c of spiral fin1The ratio of the components is as follows: c. C2:c 11, (0.1-0.9) as shown in fig. 2.
The wet cylinder sleeve with the spiral rectifying fins is characterized in that an x axis is defined as the axial direction of the wet cylinder sleeve, a z axis is defined as the axial direction of a crankshaft in a crankcase of an engine, a y axis is perpendicular to the x axis and the z axis, and a positive direction is defined according to a right-hand coordinate system rule, and the included angle between the connecting line of the starting points of the spiral rectifying fins and the axial line of the wet cylinder sleeve in a y-z plane and the z axis is 0-90 degrees, which is the value range of the installation angle α of the wet cylinder sleeve, as shown in figure 1.
The wet cylinder liner for an engine having a helical flow straightening fin of the present invention may be used in an engine in which the wet cylinder liner installation angle α may be the same or different for cylinders at different locations in an engine when the wet cylinder liner is installed in a crankcase housing.
The working principle of the wet cylinder liner of the present invention is described below with reference to the embodiments of the present invention:
as shown in fig. 1, a plurality of spiral straightening fins are uniformly distributed on the outer surface of the wet cylinder sleeve along the circumferential direction, and each fin starts from a base line of the spiral straightening fin and rotates along the outer wall surface of the wet cylinder sleeve to a finish line of the spiral straightening fin, so that the flow direction of the preheating (cooling) water in the water jacket area is adjusted. Wet cylinderThe ratio of the sleeve outer diameter d to the thread pitch h of the spiral fairing rib is in the range of 1:1 to 1: 2. As shown in FIG. 2, wet liner wall thickness c2Thickness c of spiral rectifying rib1The ratio of the spiral flow straightening fins to the wet cylinder sleeve ranges from 1:0.1 to 1:0.9, as shown in figure 1, an x axis is defined as the axial direction of the wet cylinder sleeve, a z axis is the axial direction of a crankshaft in an engine crankcase, a y axis is perpendicular to the x axis and the z axis, a positive direction is defined according to a right-hand coordinate system rule, and the included angle between the connecting line of the starting point of the spiral flow straightening fins and the axial line of the wet cylinder sleeve in a y-z plane and the z axis is 0-90 degrees, wherein the installation angle α of the wet cylinder sleeve is the value.
In the present embodiment, the outer diameter d of the wet liner is 148mm, and the pitch h of the spiral straightening rib 2 is 150 mm. The section of the spiral rectifying rib 2 is semicircular, and the thickness c of the rib12.5mm, cylinder liner wall thickness c28.25 mm. Each spiral rectifying fin starts from a base line of the spiral rectifying fin and rotates around the outer wall surface of the wet cylinder sleeve by 0.5 circle in the clockwise direction to reach a finish line of the spiral rectifying fin.
The wet cylinder liner of this embodiment is installed into the engine crankcase such that the setting angle α is 0.
Injecting preheated water into the water inlet of the water jacket at the ambient temperature of-43 ℃. The preheated water flows through the outer surface of the wet cylinder sleeve of each cylinder and the inner surface of the crankcase along the channel in the water jacket in sequence, so that the effect of improving the surface temperature of the engine body is achieved, and the engine can be started conveniently. Because the flow direction of the preheated water is modulated by the spiral rectifying fins on the outer surface of the wet cylinder sleeve, the backflow area in the water sleeve is obviously reduced, the heat exchange efficiency of the area is improved, the temperature rise rate is accelerated, and the uniformity of the temperature distribution on the surface of the cylinder sleeve is further improved.
The outer surface of the wet cylinder sleeve is properly added with the spiral rectifying fins in different shapes, and the installation angle of the wet cylinder sleeve is adjusted in a certain range, so that the flow direction of preheated water is adjusted, the area of a dead water area is reduced, the heat convection efficiency is improved, the temperature rise rate of the surface of the wet cylinder sleeve is improved in the low-temperature starting process of the engine, meanwhile, the temperature difference of the surface of each wet cylinder sleeve is reduced, and the low-temperature starting performance of the engine is improved. Due to the improvement of the heat convection efficiency, the performance of the cooling water for radiating heat of the engine during the normal operation of the engine is also improved.
Claims (4)
1. The utility model provides a wet cylinder liner that is used for engine to have spiral rectification fin, its characterized in that has 2-6 spiral rectification fins along the equidistant processing of wet cylinder liner hoop on the surface of wet cylinder liner base member, and each spiral rectification fin is followed spiral rectification fin baseline, and clockwise precession or anticlockwise precession is followed to every spiral rectification fin, and it ends to extend to spiral rectification fin finish line around wet cylinder liner base member surface, and the ratio of wet cylinder liner external diameter d and the pitch h of spiral rectification fin is: h is 1 (1-2).
2. The wet cylinder liner with helical fairing ribs as recited in claim 1, wherein said helical fairing ribs are semi-circular, rectangular, parallelogram-shaped, trapezoidal, triangular or polygonal with rounded corners in cross-section.
3. The engine wet cylinder liner with helical fairing ribs as recited in claim 1, further comprising: thickness c of wet cylinder liner2Thickness c of spiral fin1The ratio of the components is as follows: c. C2:c1＝1:(0.1-0.9)。
4. The wet cylinder liner for an engine with spiral flow-straightening fins as claimed in claim 1, wherein an x-axis is defined as an axial direction of the wet cylinder liner, a z-axis is defined as an axial direction of a crankshaft in a crankcase of the engine, a y-axis is perpendicular to the x-axis and the z-axis, a positive direction is defined according to a right-hand coordinate system rule, and an included angle between a connecting line of a starting point of the spiral flow-straightening fins and the axial line of the wet cylinder liner in a y-z plane and the z-axis is in a range of 0-90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022646.5A CN111207001A (en) | 2020-01-09 | 2020-01-09 | Wet cylinder sleeve with spiral rectifying fins for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022646.5A CN111207001A (en) | 2020-01-09 | 2020-01-09 | Wet cylinder sleeve with spiral rectifying fins for engine |
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| Publication Number | Publication Date |
|---|---|
| CN111207001A true CN111207001A (en) | 2020-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010022646.5A Pending CN111207001A (en) | 2020-01-09 | 2020-01-09 | Wet cylinder sleeve with spiral rectifying fins for engine |
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| Country | Link |
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| CN (1) | CN111207001A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB469831A (en) * | 1936-02-19 | 1937-08-04 | Arthur Freeman Sanders | Improvements in, and in the manufacture of, cylinder-liners for internal-combustion engines |
| JPS55139942A (en) * | 1979-04-17 | 1980-11-01 | Kubota Ltd | Cylinder of forced high speed water cooled engine |
| JPH01227850A (en) * | 1988-03-08 | 1989-09-12 | Nissan Motor Co Ltd | Engine cooler |
| CN2098558U (en) * | 1991-08-22 | 1992-03-11 | 上海柴油机厂 | Cylinder cover with spiral groove |
| CN102168625A (en) * | 2011-05-25 | 2011-08-31 | 中国兵器工业集团第七○研究所 | Cylinder sleeve with spiral recess |
| CN110005542A (en) * | 2019-05-07 | 2019-07-12 | 哈尔滨工程大学 | A kind of wet liner device applied to marine low-speed machine |
-
2020
- 2020-01-09 CN CN202010022646.5A patent/CN111207001A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB469831A (en) * | 1936-02-19 | 1937-08-04 | Arthur Freeman Sanders | Improvements in, and in the manufacture of, cylinder-liners for internal-combustion engines |
| JPS55139942A (en) * | 1979-04-17 | 1980-11-01 | Kubota Ltd | Cylinder of forced high speed water cooled engine |
| JPH01227850A (en) * | 1988-03-08 | 1989-09-12 | Nissan Motor Co Ltd | Engine cooler |
| CN2098558U (en) * | 1991-08-22 | 1992-03-11 | 上海柴油机厂 | Cylinder cover with spiral groove |
| CN102168625A (en) * | 2011-05-25 | 2011-08-31 | 中国兵器工业集团第七○研究所 | Cylinder sleeve with spiral recess |
| CN110005542A (en) * | 2019-05-07 | 2019-07-12 | 哈尔滨工程大学 | A kind of wet liner device applied to marine low-speed machine |
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Application publication date: 20200529 |
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