Heavy-duty engine layered water jacket

Abstract

The utility model discloses a heavy-duty engine layered water jacket which comprises a cylinder sleeve and a cylinder body, a cylinder sleeve outer circle protrusion is arranged on the outer wall face of the cylinder sleeve, the cylinder sleeve outer circle protrusion makes contact with the inner wall face of the cylinder body to form an auxiliary support, and the cylinder sleeve outer circle protrusion divides a water jacket area defined by the cylinder sleeve and the cylinder body into an upper layer and a lower layer. The water jackets comprise an upper water jacket and a lower water jacket. Cooling of the inner wall face of the air cylinder sleeve in the upper-layer water jacket area can be guaranteed not to be affected, the problem that the span between the upper end and the lower end of the water jacket is large can be solved through the auxiliary support, vibration of the air cylinder sleeve is reduced, and therefore cavitation erosion risks are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a layered water jacket of a heavy-duty engine. Background Art

[0002] For heavy-duty engines, the load is large and high, and the cooling of the inner wall of the cylinder liner is very important. A wet cylinder liner is used, and the outer wall of the cylinder liner and the inner wall of the cylinder body form a water jacket. The cylinder liner is in direct contact with the coolant, which can effectively reduce the temperature of the inner wall of the cylinder liner and reduce the deformation and wear of the cylinder liner.

[0003] The existing patent, patent number CN201620368684.5, discloses a cylinder liner and cylinder body structure of dry-wet hybrid form, including a cylinder body and a cylinder liner, the cylinder liner includes an upper thick-walled section and a lower thin-walled section, the upper end of the thick-walled section is provided with an outer peripheral support surface, and the connection between the thick-walled section and the thin-walled section forms a support shoulder; an inner hole support surface is provided near the opening at the upper end of the cylinder chamber, and the inner hole support surface cooperates with the outer peripheral support surface for positioning; a positioning support cylinder is provided in the lower part of the cylinder chamber, the outer wall of the positioning support cylinder is connected to the inner wall of the cylinder chamber through a support connecting plate, and a step support surface is provided on the top of the positioning support cylinder; the support shoulder of the cylinder liner is sealed and cooperated with the step support surface at the top of the positioning support cylinder for positioning, and the thin-walled section of the cylinder liner is assembled in the positioning support cylinder in a clearance fit manner; a concave cavity is provided on the inner wall of the cylinder chamber outside the thick-walled section of the cylinder liner, and the outer wall of the cylinder liner, the outer wall of the positioning support cylinder, the inner wall of the cylinder chamber, the support connecting plate and the partition form a water jacket cavity surrounding the cylinder liner. The utility model realizes the dry-wet combination of the cylinder sleeve.

[0004] The support methods of the cylinder liner are divided into upper support and middle support according to the position of the support shoulder. When the cylinder center distance is sufficient, the upper support arrangement is generally adopted. This arrangement has small cylinder bore deformation, low oil consumption, small cylinder liner vibration, and low cavitation risk. However, heavy-duty engines generally have a larger engine stroke, and the corresponding cooling water jacket composed of the outer wall of the cylinder liner and the inner wall of the cylinder body is also larger. The upper end of the water jacket has a large span from the lower end, and there is no support within the entire water jacket. The cylinder liner vibrates greatly and the risk of cavitation is high. Utility Model Content

[0005] In view of the above problems, the utility model provides a layered water jacket for a heavy-duty engine, which can not only ensure that the cooling of the inner wall of the cylinder liner in the upper water jacket area is not affected, but also use auxiliary supports to reduce the problem of large span between the upper and lower ends of the water jacket, reduce the vibration of the cylinder liner, and thus reduce the risk of cavitation.

[0006] The utility model adopts the following technical solutions to achieve the above purpose:

[0007] A layered water jacket of a heavy-duty engine comprises a cylinder liner and a cylinder block, wherein a cylinder liner supporting shoulder is provided on the top of the cylinder liner, and the cylinder liner supporting shoulder and the bottom of the cylinder liner are both protruded relative to the outer wall surface of the cylinder liner, and a cylinder liner outer circular protrusion is provided on the outer wall surface of the cylinder liner, and the cylinder liner outer circular protrusion divides the outer wall surface of the cylinder liner into an upper wall surface of the cylinder liner and a lower wall surface of the cylinder liner; the cylinder liner outer circular protrusion abuts against the inner wall surface of the cylinder block and divides the inner wall surface of the cylinder block into an upper wall surface of the cylinder block and a lower wall surface of the cylinder block, the cylinder liner supporting shoulder, the upper wall surface of the cylinder liner, the upper wall surface of the cylinder block and the cylinder liner outer circular protrusion form an upper water jacket, and the cylinder liner outer circular protrusion, the lower wall surface of the cylinder liner, the lower wall surface of the cylinder block and the bottom of the cylinder liner form a lower water jacket.

[0008] Preferably, the upper wall of the cylinder body is provided with a first water hole connected to the upper water jacket, and the lower wall of the cylinder body is provided with a second water hole connected to the lower water jacket, and the first water hole is connected to the second water hole.

[0009] The beneficial effects of the utility model are:

[0010] The heavy-duty engine layered water jacket of the utility model adds an outer circular protrusion on the outer wall surface of the cylinder liner as an auxiliary support, opens a water hole at a suitable position of the cylinder body, and allows the upper water jacket and the lower water jacket formed by the outer wall surface of the cylinder liner and the inner wall surface of the cylinder body to be connected, which can ensure that the cooling of the inner wall surface of the cylinder liner in the upper water jacket area is not affected, and can also use the auxiliary support to reduce the problem of large span between the upper and lower ends of the water jacket, reduce the vibration of the cylinder liner, and thus reduce the risk of cavitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of a layered water jacket for a heavy-duty engine provided by an embodiment of the utility model;

[0012] Figure 2 A schematic diagram of the structure of a cylinder liner in a layered water jacket of a heavy-duty engine provided by an embodiment of the utility model;

[0013] Figure 3 A schematic structural diagram of a cylinder block in a layered water jacket of a heavy-duty engine provided in an embodiment of the utility model.

[0014] In the accompanying drawings, 1-cylinder liner, 2-cylinder body, 3-cylinder liner support shoulder, 4-bottom of cylinder liner, 5-cylinder liner outer circular protrusion, 6-cylinder liner upper wall, 7-cylinder liner lower wall, 8-cylinder body upper wall, 9-cylinder body lower wall, 10-upper water jacket, 11-lower water jacket, 12-first water hole, 13-second water hole. DETAILED DESCRIPTION

[0015] The following is combined with Figures 1 to 3The utility model is described in detail with specific implementation modes.

[0016] Please also see Figures 1 to 3 The present embodiment provides a layered water jacket for a heavy-duty engine, including a cylinder liner 1 and a cylinder block 2. A cylinder liner support shoulder 3 is provided on the top of the cylinder liner 1. The cylinder liner support shoulder 3 and the bottom 4 of the cylinder liner 1 are both protruded relative to the outer wall surface of the cylinder liner 1. A cylinder liner outer circular protrusion 5 is provided on the outer wall surface of the cylinder liner 1. The cylinder liner outer circular protrusion 5 divides the outer wall surface of the cylinder liner 1 into a cylinder liner upper wall surface 6 and a cylinder liner lower wall surface 7. The cylinder liner outer circular protrusion 5 abuts against the inner wall surface of the cylinder block 2 and divides the inner wall surface of the cylinder block 2 into a cylinder block upper wall surface 8 and a cylinder block lower wall surface 9. The cylinder liner support shoulder 3, the cylinder liner upper wall surface 6, the cylinder block upper wall surface 8 and the cylinder liner outer circular protrusion 5 form an upper water jacket 10. The outer circular protrusion 5 of the cylinder liner, the lower wall surface 7 of the cylinder liner, the lower wall surface 9 of the cylinder body and the bottom 4 of the cylinder liner form a lower water jacket 11.

[0017] When the layered water jacket of the heavy-duty engine of the utility model is in use, in order to avoid the problems of lack of support, large vibration and easy cavitation of the cylinder liner 1 in the entire water jacket range, that is, the area between the cylinder liner support shoulder 3 and the bottom 4 of the cylinder liner, a cylinder liner outer circular protrusion 5 is arranged on the upper position of the outer wall surface of the cylinder liner 1. The cylinder liner outer circular protrusion 5 contacts the inner wall surface of the cylinder body 2 to form an auxiliary support, and the cylinder liner outer circular protrusion 5 divides the water jacket area surrounded by the cylinder liner 1 and the cylinder body 2 into two layers, namely, an upper water jacket 10 and a lower water jacket 11.

[0018] In this embodiment, the upper wall of the cylinder block 2 is provided with a first water hole 12 connected to the upper water jacket 10, and the lower wall of the cylinder block 2 is provided with a second water hole 13 connected to the lower water jacket 11. The first water hole 12 is connected to the second water hole 13, thereby allowing the upper water jacket 10 and the lower water jacket 11 to be connected. This can not only ensure that the cooling of the cylinder liner upper wall surface 6 in the area of ​​the upper water jacket 10 is not affected, but also reduce the problem of large span between the upper and lower ends of the water jacket through the cylinder liner outer circle protrusion 5, reduce the vibration of the cylinder liner 1, and thus reduce the risk of cavitation.

[0019] Although the present invention has been described in detail above with specific implementation methods, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A heavy-duty engine layered water jacket, comprising a cylinder liner and a cylinder block, characterized in that: A cylinder liner supporting shoulder is provided on the top of the cylinder liner, and the cylinder liner supporting shoulder and the bottom of the cylinder liner are both protruded relative to the outer wall surface of the cylinder liner, and a cylinder liner outer circular protrusion is provided on the outer wall surface of the cylinder liner, and the cylinder liner outer circular protrusion divides the outer wall surface of the cylinder liner into an upper wall surface of the cylinder liner and a lower wall surface of the cylinder liner; the cylinder liner outer circular protrusion abuts against the inner wall surface of the cylinder body, and divides the inner wall surface of the cylinder body into an upper wall surface of the cylinder body and a lower wall surface of the cylinder body, the cylinder liner supporting shoulder, the upper wall surface of the cylinder liner, the upper wall surface of the cylinder body and the cylinder liner outer circular protrusion form an upper water jacket, and the cylinder liner outer circular protrusion, the lower wall surface of the cylinder liner, the lower wall surface of the cylinder body and the bottom of the cylinder liner form a lower water jacket.

2. The heavy-duty engine layered water jacket according to claim 1, characterized in that: The upper wall of the cylinder body is provided with a first water hole connected to the upper water jacket, and the lower wall of the cylinder body is provided with a second water hole connected to the lower water jacket, and the first water hole is connected to the second water hole.

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