Low-cost air cylinder body of aviation piston engine
By integrating water and oil channels in the cylinder body of the aero piston engine, the external cooling pipelines and water pump parts are reduced, and the use of die-cast aluminum and cast iron materials is combined, the problem of increased engine volume and weight is solved, and reliability and reduction are improved. The cost.
Patent Information
- Application Number
- CN202420749608.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The existing aircraft engines require more water and oil to cool, resulting in increased engine volume and weight, a large number of parts, a large number of external pipelines, and difficulty in ensuring reliability, and the production cost of independent water pumps is high.
Design a cylinder block of a low-cost aviation piston engine. The main body of the cylinder is equipped with water passages and oil passages. The water pump runner cavity is integrated on the cylinder block, reducing the external cooling pipeline and water pump housing, and adopting die-cast aluminum and cast iron material, fasteners are bolts, and the main bearing cover is embedded in the cylinder frame to enhance support.
It reduces the size and weight of the engine, reduces the number of parts and costs, improves overall reliability, and avoids cylinder frame deformation and thread pull-off failure.
Smart Images
Figure CN222141383U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of piston engines, and more specifically to a low-cost aviation piston engine cylinder body. Background Art
[0002] With the development of aviation piston engine technology, low-cost automotive engines can be used in unmanned aircraft after design modifications. The power and torque of the engine are constantly increasing, requiring more water and oil cooling, which in turn requires the addition of an oil cooler to cool the oil, and the water pump also needs to increase its displacement to transport more water, which is bound to increase the size and weight of the engine. In addition, the oil cooler requires an external special cooling pipeline, and the water pump is fixed to the engine with fasteners, which makes the engine have a large number of parts, numerous external pipelines, increased volume and weight, and difficult to ensure reliability. In addition, the production cost of an independent water pump is also high. Utility Model Content
[0003] 1. Technical issues to be resolved
[0004] The technical problem to be solved by the utility model is that the existing engine has many assembled parts and numerous and complicated external pipelines, which increases the volume and mass of the engine and makes it difficult to ensure reliability.
[0005] (II) Technical solution
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] In the first aspect, the utility model provides a low-cost aviation piston engine cylinder block, including a cylinder body, in which a main oil channel, a water channel, an oil channel and a water pump flow channel cavity are provided; the oil channel is connected to the main oil channel and has an oil inlet hole and an oil outlet hole for connecting to an oil cooler, one end of the water channel is connected to the water pump flow channel cavity, and the other end of the water channel is provided with a water inlet hole and a water outlet hole for connecting to the oil cooler, and the water pump flow channel cavity is used to connect to a water pump.
[0008] Preferably, the cylinder body includes a first cylinder body and a second cylinder body connected to each other, and the first cylinder body is provided with the water channel, the oil channel and the water pump flow channel cavity.
[0009] Preferably, the second cylinder body comprises a cylinder body frame, a main bearing cap and a plurality of fasteners; a plurality of the main bearing caps are embedded in the cylinder body frame, and the fasteners fasten and connect the main bearing caps and the cylinder body frame.
[0010] Preferably, the second cylinder body further includes a positioning pin, and the positioning pin positions and connects the cylinder body frame and the main bearing cap.
[0011] Preferably, the cylinder frame is made of die-cast aluminum, and the main bearing cap is made of cast iron.
[0012] Preferably, the fastener is a bolt.
[0013] Preferably, there are a plurality of main bearing caps, and the plurality of main bearing caps are arranged at intervals along the length direction of the cylinder frame.
[0014] Preferably, the oil passage is also provided with an oil pressure relief oil return hole for connecting to an oil cooler.
[0015] In a second aspect, the utility model also provides an engine, comprising a low-cost aviation piston engine cylinder block as described in any one of the above technical solutions.
[0016] (III) Beneficial effects
[0017] The above technical solution of the utility model has at least the following advantages:
[0018] 1. A water channel and an oil channel are provided in the cylinder body of the utility model. The water channel and the oil channel are integrally cast when the cylinder body is produced. Therefore, when installing the oil cooler and the oil filter, it is only necessary to connect the corresponding interfaces of the oil cooler and the oil filter to the water channel and the oil channel, and no external special cooling pipeline is required, which reduces the number of parts such as hose clamps, reduces the volume of the whole machine, reduces the weight of the whole machine, reduces the cost, etc.
[0019] 2. A water pump flow channel cavity is provided in the cylinder body of the utility model, and the water pump flow channel cavity is integrated on the cylinder body, thereby reducing the number of parts such as the water pump housing and fixing bolts, reducing the volume of the whole machine, reducing the weight of the whole machine, reducing the cost, etc.
[0020] 3. The main bearing cap is embedded in the cylinder frame, which solves the problem of insufficient support of the main bearing cap by the cylinder frame, increases the rigidity of the main bearing cap, and reduces the deformation of the cylinder frame, the occurrence of faults such as the first cylinder thread pulling off, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 This is one of the structural schematic diagrams of a low-cost aviation piston engine cylinder block provided by an embodiment of the utility model.
[0023] Figure 2 This is the second structural schematic diagram of the low-cost aviation piston engine cylinder block provided by the embodiment of the utility model.
[0024] Figure 3 It is a cross-sectional view of a low-cost aviation piston engine cylinder block provided by an embodiment of the utility model.
[0025] Figure 4 This is the third structural schematic diagram of the low-cost aviation piston engine cylinder block provided by the embodiment of the utility model.
[0026] The reference numerals in the figures are:
[0027] 1. Oil inlet hole; 2. Oil outlet hole; 3. Oil pressure relief and return hole; 4. Water inlet hole; 5. Water outlet hole; 6. Water pump flow channel cavity; 7. First cylinder block; 8. Second cylinder block; 9. Main bearing cover; 10. Cylinder frame; 11. Fasteners; 12. Locating pins. DETAILED DESCRIPTION
[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.
[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate that a device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.
[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The following is a more detailed description of the specific implementation of the present utility model in conjunction with specific embodiments:
[0032] The function of the engine cooling system is to dissipate the heat absorbed by the heated parts in time to ensure that the engine works at the most suitable temperature. An oil cooler is usually installed in the existing engine cooling system. The function of the oil cooler is to cool the lubricating oil and keep the oil temperature within the normal working range. In a high-power reinforced engine, an oil cooler must be installed due to the large heat load. When the engine is running, the viscosity of the oil becomes thinner as the temperature rises, which reduces the lubrication ability. Therefore, the engine is equipped with an oil cooler, which is used to reduce the oil temperature and maintain a certain viscosity of the lubricating oil. The oil cooler is placed in the cooling water circuit and uses the temperature of the cooling water to control the temperature of the lubricating oil. When the temperature of the lubricating oil is high, it is cooled by the cooling water. When the engine starts, it absorbs heat from the cooling water to quickly increase the temperature of the lubricating oil. The oil cooler consists of a shell, a front cover, a rear cover and a copper core tube cast from an aluminum alloy. In order to enhance cooling, a heat sink is set outside the tube. The cooling water flows outside the tube, and the lubricating oil flows inside the tube, and the two exchange heat. There is also a structure that allows oil to flow outside the tube and water to flow inside the tube.
[0033] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, an embodiment of the utility model provides a low-cost aviation piston engine cylinder block, including a cylinder body, in which a main oil channel, a water channel, an oil channel and a water pump flow channel cavity 6 are arranged; the oil channel is connected to the main oil channel, and has an oil inlet hole 1 and an oil outlet hole 2 for connecting to an oil cooler, one end of the water channel is connected to the water pump flow channel cavity 6, and the other end of the water channel is provided with a water inlet hole 4 and a water outlet hole 5 for connecting to an oil cooler, and the water pump flow channel cavity 6 is used to connect to a water pump. Specifically, the engine oil enters the oil cooler and the oil filter through the oil inlet hole 1, and the cooled and filtered engine oil is supplied to the main oil channel of the cylinder body from the oil outlet hole. The cooling water enters the oil cooler from the water inlet hole 4, and flows back to the cylinder head cooling water jacket of the cylinder body from the water outlet hole 5.
[0034] As one of the optional implementations of this embodiment, the cylinder body includes a first cylinder body 7 and a second cylinder body 8 connected to each other, and a water channel, an oil channel and a water pump flow channel cavity are provided in the first cylinder body 7. Specifically, the first cylinder body is located above the second cylinder body, and the first cylinder body and the second cylinder body are assembled to form the cylinder body.
[0035] As one of the optional implementations of this embodiment, the second cylinder body 8 includes a cylinder frame 10, a main bearing cap 9 and a plurality of fasteners 11; a plurality of main bearing caps 9 are embedded in the cylinder frame 10, and the fasteners 11 fasten the main bearing caps 9 and the cylinder frame 10. The high power-to-weight ratio design requirement promotes the all-aluminum alloy design of the cylinder body. In order to avoid cracking of the main bearing seat on the cylinder frame 10, the main bearing cap 9 is embedded in the main bearing seat frame of the cylinder frame 10. If the support strength of the cylinder frame 10 is insufficient, it is easy to cause deformation of the cylinder frame 10, thereby causing crack failure, first cylinder thread pull-off and other faults. Therefore, in this embodiment, a plurality of main bearing caps 9 are embedded in the cylinder frame 10. The main bearing caps 9 have a high structural strength and can enhance the support strength of the cylinder frame 10 to resist deformation.
[0036] As one of the optional implementations of this embodiment, the second cylinder body 8 further includes a positioning pin 12, which positions and connects the cylinder body frame 10 and the main bearing cap 9. Specifically, the cylinder body frame 10 and the main bearing cap 9 are provided with corresponding pin holes, and the positioning pin 12 passes through the corresponding pin holes to achieve the positioning connection between the cylinder body frame 10 and the main bearing cap 9. More specifically, there are two positioning pins 12.
[0037] As one of the optional implementations of this embodiment, the material of the cylinder frame 10 is die-cast aluminum, and the material of the main bearing cap 9 is cast iron. The material stiffness of cast iron is greater than that of die-cast aluminum, so embedding the main bearing cap 9 in the cylinder frame 10 can improve the overall structural strength of the cylinder frame 10.
[0038] As an optional implementation of this embodiment, the fastener 11 is a bolt.
[0039] As one of the optional implementations of this embodiment, there are multiple main bearing caps 9, and the multiple main bearing caps 9 are arranged at intervals along the length direction of the cylinder frame 10.
[0040] As one of the optional implementations of this embodiment, the oil passage is further provided with an oil pressure relief oil return hole 3 for connecting to the oil cooler.
[0041] The utility model also provides an engine, comprising any one of the low-cost aviation piston engine cylinder bodies in the above embodiments.
[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A low-cost aviation piston engine cylinder block, characterized in that: include: A cylinder body, wherein a main oil channel, a water channel, an oil channel and a water pump flow channel cavity are arranged in the cylinder body; The oil channel is connected to the main oil channel and has an oil inlet hole and an oil outlet hole for connecting to the oil cooler. One end of the water channel is connected to the water pump flow channel cavity. The other end of the water channel is provided with a water inlet hole and a water outlet hole for connecting to the oil cooler. The water pump flow channel cavity is used to connect to a water pump.
2. A low-cost aviation piston engine cylinder block as claimed in claim 1, characterized in that: The cylinder body includes a first cylinder body and a second cylinder body connected to each other, and the first cylinder body is provided with the water channel, the oil channel and the water pump flow channel cavity.
3. A low-cost aviation piston engine cylinder block as claimed in claim 2, characterized in that: The second cylinder body comprises a cylinder body frame, a main bearing cap and a plurality of fasteners; a plurality of the main bearing caps are embedded in the cylinder body frame, and the fasteners fasten and connect the main bearing caps and the cylinder body frame.
4. A low-cost aviation piston engine cylinder block as claimed in claim 3, characterized in that: The second cylinder block further includes a positioning pin, and the positioning pin is used to position and connect the cylinder block frame and the main bearing cap.
5. A low-cost aviation piston engine cylinder block as claimed in claim 3, characterized in that: The material of the cylinder frame is die-cast aluminum, and the material of the main bearing cap is cast iron.
6. A low-cost aviation piston engine cylinder block as claimed in claim 3, characterized in that: The fastener is a bolt.
7. A low-cost aviation piston engine cylinder block as claimed in claim 3, characterized in that: There are a plurality of main bearing caps, and the plurality of main bearing caps are arranged at intervals along the length direction of the cylinder frame.
8. A low-cost aviation piston engine cylinder block as claimed in claim 1, characterized in that: The oil passage is also provided with an oil pressure relief oil return hole for connecting to an oil cooler.