Novel rotor engine cooling water jacket structure
The asymmetric partitioned cooling water jacket structure solves the problem of uneven cooling in rotary engines, achieving efficient cooling and energy optimization, and improving the reliability and stability of the engine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HARBIN DONGAN AUTO ENGINE CO LTD
- Filing Date
- 2026-03-18
- Publication Date
- 2026-04-24
AI Technical Summary
Existing rotary engine cooling water jackets suffer from poor cooling efficiency, energy waste, and large temperature gradients, leading to localized overheating, high risk of knocking, and poor engine stability and durability.
The cooling water jacket structure, which adopts an asymmetric partition design, optimizes coolant flow by enhancing cooling in high-temperature areas and reducing cooling in low-temperature areas, and by utilizing cooling units of different sizes and connecting ring flow guiding structures.
It achieves targeted and efficient cooling, reduces the risk of knocking, improves engine reliability and lifespan, while optimizing energy utilization, reducing thermal stress, and improving overall engine efficiency and stability.
Smart Images

Figure CN121916077A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of rotary engine cooling equipment, specifically relating to a novel rotary engine cooling water jacket structure. Background Technology
[0002] Existing rotary engine cooling water jackets typically employ a method of uniformly arranging cooling water channels around the cylinder cavity inside the cylinder block. This uniformly distributed water jacket structure has the following drawbacks:
[0003] Poor cooling efficiency: Insufficient cooling intensity for high-temperature areas (such as the area around the combustion chamber), unable to remove a large amount of heat in time, which can easily lead to local overheating, causing knocking, cylinder block deformation, or even cracking.
[0004] Cooling waste: Providing similar cooling intensity to high-temperature areas (such as the intake area) with low-temperature areas results in unnecessary pumping power loss and reduces the overall efficiency of the engine.
[0005] Large temperature gradient: There is a huge temperature difference inside the cylinder block, which generates thermal stress and affects the stability and durability of the engine. Summary of the Invention
[0006] The purpose of this invention is to solve the problems of uneven heat dissipation, localized overheating, and energy waste caused by insufficient cooling of high-temperature areas and excessive cooling of low-temperature areas in existing uniformly distributed water jackets. The technical solution is as follows:
[0007] A novel rotary engine cooling water jacket structure is characterized by comprising several cooling units 1 and a connecting upper ring 3 that connects the cooling units 1 in a circular fashion. One of the cooling units 1 has a mounting through hole 2 at the center of its inner surface. A connecting lower ring 4 is fixedly connected between the lower surfaces of the cooling units 1. A connecting support plate 5 is connected between the openings on the side surfaces of the connecting lower ring 4. Several water outlet ports 6 are connected to the outer surface of the connecting support plate 5. A water inlet port 7 is connected between one side of the openings of the connecting upper ring 3 and the connecting lower ring 4. The cooling units 1 are arranged in a circular shape, and each cooling unit 1 has a different size. The interior of each cooling unit 1 is interconnected with the interior of the connecting upper ring 3 and the connecting lower ring 4. Bolts for connection to the rotary engine are inserted through the mounting through hole 2. The cooling units 1, the connecting upper ring 3 and the connecting lower ring 4, the water outlet port 6, and the water inlet port 7 are interconnected.
[0008] The beneficial effects of this invention are as follows:
[0009] Targeted and efficient cooling: By strengthening the cooling of high-temperature areas, local overheating is effectively prevented, the risk of knocking is reduced, and the reliability and service life of the engine are improved.
[0010] Optimized energy utilization: Reduced overcooling of low-temperature regions and reduced pumping losses in the cooling system, thereby improving the overall thermal efficiency of the engine.
[0011] Balanced thermal management: The asymmetric partition design helps reduce the temperature gradient inside the cylinder block, significantly reducing thermal stress and improving the structural stability and durability of the cylinder block. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention. Detailed Implementation
[0013] Reference Figure 1 The novel rotor engine cooling water jacket structure is characterized by comprising a plurality of cooling units 1 and a connecting upper ring 3 that connects the plurality of cooling units 1 in a tangential manner. One of the cooling units 1 has a mounting through hole 2 in the middle of its inner surface. A connecting lower ring 4 is fixedly connected between the lower surfaces of the plurality of cooling units 1. A connecting support plate 5 is connected between the openings on the side surfaces of the connecting lower ring 4. A plurality of water outlet ports 6 are connected to the outer surface of the connecting support plate 5. A water inlet port 7 is connected between the openings on one side of the connecting upper ring 3 and the connecting lower ring 4.
[0014] A novel rotary engine cooling water jacket structure is installed in the elliptical cylinder body of the rotary engine and arranged around the cylinder cavity.
[0015] Its core improvement lies in the fact that the cooling water jacket structure adopts an asymmetrical partition design, which divides the water jacket into several cooling units of different sizes according to the heat load differences in different areas of the cylinder block circumference.
[0016] Larger cooling unit 1: Corresponding to the combustion chamber, spark plug mounting position and the area swept by the rotor working surface. This unit is characterized by a denser distribution of water channels, a larger cross-sectional area of water channels, or a closer proximity to the cylinder cavity surface, in order to enhance the heat exchange capacity and coolant flow rate in this area.
[0017] Smaller cooling unit 1: For areas with lower temperatures, such as the air intake, this unit is characterized by a relatively sparse distribution of water channels, a small cross-sectional area of the water channels, or a distance from the cylinder cavity surface, in order to provide basic cooling and reduce flow resistance.
[0018] Furthermore, several cooling units 1 are connected by a smooth transition connecting upper ring 3 and connecting lower ring 4 flow guiding structure to ensure smooth flow of coolant and avoid the generation of eddies and dead zones.
[0019] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A novel rotary engine cooling water jacket structure, characterized in that: It includes several cooling units (1) and a connecting upper ring (3) that connects several cooling units (1) in a tangential manner. One of the cooling units (1) has a mounting through hole (2) in the middle of its inner surface. A connecting lower ring (4) is fixedly connected between the lower surfaces of several cooling units (1). A connecting support plate (5) is connected between the openings on the side surfaces of the connecting lower ring (4). Several water outlets (6) are connected to the outer surface of the connecting support plate (5). A water inlet (7) is connected between the connecting upper ring (3) and one side of the opening of the connecting lower ring (4).
2. The novel rotary engine cooling water jacket structure according to claim 1, characterized in that: Several cooling units (1) are arranged in a circular shape, and each cooling unit (1) is of a different size.
3. The novel rotary engine cooling water jacket structure according to claim 1, characterized in that: Each of the cooling units (1) is internally connected to the upper connecting ring (3) and the lower connecting ring (4).
4. The novel rotary engine cooling water jacket structure according to claim 1, characterized in that: The mounting through hole (2) is fitted with bolts that are connected to the rotary engine.
5. The novel rotary engine cooling water jacket structure according to claim 1, characterized in that: The cooling unit (1), the upper connecting ring (3) and the lower connecting ring (4), the water outlet (6) and the water inlet (7) are internally interconnected.