Oil cooler for aviation piston engine and production method of oil cooler

Abstract

The oil cooler for the aviation piston engine comprises a shell provided with a heat exchange chamber and a water chamber, a through hole communicated with the interior of the shell is formed in the shell, a connector corresponding to the through hole is arranged outside the shell, a mounting base is fixedly connected to the position, located at the through hole, of the shell, and the mounting base is fixedly connected with the heat exchange chamber. Matching threads are arranged between the connector and the installation base, and the connector and the installation base are fixed in a sealing and bonding mode. According to the scheme, the problem that in the prior art, oil coolers are high in production cost is solved.

Description

Technical Field

[0001] The invention relates to cooling equipment for an aviation engine, in particular to an oil cooler for an aviation piston engine. Background Art

[0002] In the field of aviation piston engines, external oil coolers are usually used to cool the lubricating oil and control the lubricating oil temperature to ensure safe engine operation. Common oil coolers include air-cooled and water-cooled types. Among them, water-cooled oil coolers have been increasingly widely used due to their high heat exchange efficiency, small size, high integration and flexible layout.

[0003] Chinese patent document CN211116170U discloses an oil cooler for an aircraft engine, comprising a body having an oil chamber and a water chamber, wherein the oil chamber is connected to an oil inlet pipe and an oil outlet pipe, and is characterized in that: a cooling water chamber is arranged at the upper part of the body, a partition is arranged at the middle part of the cooling water chamber, the partition divides the cooling water chamber into a water inlet chamber and a water outlet chamber, the water inlet chamber is connected to a water inlet pipe, the water inlet pipe is connected to a water outlet of a cylinder head, a water hole is arranged on the partition, the water outlet chamber is connected to a water outlet pipe, and the water inlet chamber and the water outlet chamber are communicated with the water chamber.

[0004] The oil cooler of the above-mentioned prior art has a compact structure and improves the cooling effect. In actual production, the oil cooler is manufactured by integral welding, that is, the various pipes and the shell of the main body are also welded to ensure the sealing performance. However, most of the current aircraft engines are customized, which easily leads to large differences in the space used to install the oil cooler, resulting in the oil cooler forming a variety of structural forms. As far as the water outlet of the oil cooler is concerned, two different structural forms of top water outlet and side water outlet can be formed. At the same time, due to the different installation positions, the structural form of whether the cold liquid filling and degassing functions are integrated will also be formed. Therefore, each structural form of the oil cooler needs to be processed and produced separately and quality inspected. When each oil cooler is welded and produced, the equipment used for welding and the corresponding operation control are unique, which leads to a high production cost of the oil cooler. Summary of the invention

[0005] The purpose of the present invention is to provide an oil cooler for an aviation piston engine to solve the problem of high production cost of the oil cooler in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an oil cooler for an aviation piston engine, comprising a shell having a heat exchange chamber and a water chamber, the shell being provided with a through hole communicating with the interior of the shell, the outside of the shell being provided with a connecting head corresponding to the through hole, a mounting seat being fixedly connected to the through hole on the shell, a matching thread being provided between the connecting head and the mounting seat, and the connecting head being sealed and bonded and fixed to the mounting seat.

[0007] The beneficial effect of this solution is that by setting the mounting seat and setting the matching threads between the connector and the mounting seat, the connector can be adjusted according to the installation needs, and then sealed and bonded to make the oil cooler meet the requirements of connection strength and sealing. Compared with the oil cooler produced by welding in the prior art, the matching threads and sealing and bonding are universal settings, so that oil coolers of different structural forms can be produced in the same way, and different finished oil coolers can be obtained by simply adjusting the connector accordingly, thereby greatly reducing the production cost of the oil cooler.

[0008] Preferably, the mating threads between the connector and the mounting seat are sealed and bonded with a sealant. With such a setting, the sealant fills the thread gap of the mating threads, and the distribution area of ​​the sealant is larger through the mating threads, which is beneficial to improving the bonding strength between the connector and the mounting seat. At the same time, after the sealant is cured, the gap of the mating threads is blocked, so that the sealing effect between the connector and the mounting seat is better and the connection strength is greater, which is beneficial to further improve the quality of the oil cooler.

[0009] Preferably, a sealing ring is further arranged between the mounting seat and the connector. Such an arrangement is conducive to further improving the sealing performance between the mounting seat and the connector, thereby improving the sealing performance of the entire oil cooler.

[0010] Preferably, the mounting seat includes an inlet pipe mounting seat and an outlet pipe mounting seat, the water chamber includes an inlet cavity and an outlet cavity, and the inlet pipe mounting seat is provided in at least three directions of the inlet cavity adjacent to the heat exchange chamber, and the outlet pipe mounting seat is provided in at least two directions of the outlet cavity. With such a setting, the connection positions of the inlet and outlet pipes of the oil cooler can be selected in a variety of ways according to installation requirements, so that the oil cooler can meet different functional requirements.

[0011] Preferably, the mounting seat further comprises an oil pipe mounting seat, and the oil pipe mounting seat is arranged on a side of the water chamber away from the heat exchange chamber. Such an arrangement is advantageous for the connection and arrangement of the oil pipeline.

[0012] In a second aspect, the present invention provides a method for producing an oil cooler for an aviation piston engine, comprising the following steps: S1. Prepare a housing and a connector of an oil cooler, wherein the housing is fixedly connected to a mounting seat threadedly matched with the connector; S2. Apply sealant to the threaded surfaces of the corresponding mounting seat and connector, then connect the connector to the mounting seat, and adjust the connector to the designed position for positioning; S3. Curing the sealant between the mounting seat and the connector to securely connect the connector to the mounting seat.

[0013] The beneficial effect is that by adopting the production method of the present invention, oil coolers with different structural forms can be obtained by adjusting the connector under the same production method, thereby greatly improving the production efficiency of the oil cooler and reducing the production cost of the oil cooler.

[0014] Preferably, in step S1, the connector includes a plurality of connectors adapted to the housing, and a corresponding connector is selected to match the housing as required. Such a setting is conducive to producing oil coolers of more structural forms, thereby further reducing production costs.

[0015] Preferably, in step S2, before applying sealant to the threaded surfaces of the mounting seat and the connector, an accelerator compatible with the sealant is first sprayed on the threaded surfaces and then dried. This arrangement is conducive to further improving the quality of the oil cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of an embodiment of an oil cooler for an aviation piston engine of the present invention when a connector is not installed; Figure 2 The present invention is a schematic diagram of an embodiment of an oil cooler for an aviation piston engine when a connector is installed. DETAILED DESCRIPTION

[0017] The following is further described in detail through specific implementation methods: The figure marks in the drawings of the specification include: water chamber 1, heat exchange chamber 2, partition 3, water inlet pipe mounting seat 4, water outlet pipe mounting seat 5, oil pipe mounting seat 6, degassing pipe mounting seat 7, water filling port seat 8, degassing pipe connector 9, oil pipe connector 10, plug 11, curved water inlet pipe connector 12, water outlet pipe connector 13, straight water inlet pipe connector 14.

[0018] Embodiment 1: As shown in the attached Figure 1 and Figure 2 As shown: An oil cooler for an aviation piston engine, comprising a shell having a heat exchange chamber 2 and a water chamber 1, a through hole communicating with the interior of the shell is provided on the shell, a connector corresponding to the through hole is provided on the outside of the shell, a mounting seat is fixedly connected to the through hole on the shell, and the connector is detachably connected to the mounting seat. In this embodiment, the detachable connection between the mounting seat and the connector is preferably a threaded connection. A sealing ring is also provided between the mounting seat and the connector.

[0019] In this embodiment, a partition 3 is provided inside the shell to divide the water chamber 1 into a water inlet chamber and a water outlet chamber, and a water through hole is provided on the partition 3 to connect the water inlet chamber and the water outlet chamber. In this embodiment, the through hole includes a water through hole for supplying water in and out of the shell and an oil through hole for supplying oil in and out of the shell. In this embodiment, the mounting seat includes a water inlet pipe mounting seat 4, a water outlet pipe mounting seat 5 and an oil pipe mounting seat 6. The water inlet pipe mounting seat 4 and the water outlet pipe mounting seat 5 are respectively arranged at the corresponding water through holes, and the oil pipe mounting seat 6 is arranged at the oil through hole. In this embodiment, a water inlet pipe mounting seat 4 is arranged in at least three directions of the water inlet chamber adjacent to the heat exchange chamber 2. Specifically, two water inlet pipe mounting seats 4 are arranged in one direction in which the water inlet chamber is adjacent to the heat exchange chamber 2 and is also adjacent to the water outlet chamber; and one water inlet pipe mounting seat 4 is arranged in the direction in which the water inlet chamber is adjacent to the heat exchange chamber 2 and is opposite to the water outlet chamber. Therefore, in this embodiment, the water inlet cavity is provided with five water inlet pipe mounting seats 4, so that the water inlet cavity of the oil cooler can be connected to the water inlet pipe connector in three directions. In actual use, the water inlet pipe mounting seats 4 are connected with a straight-through water inlet pipe connector 14 or a curved water inlet pipe connector 12 as required, and the unused water inlet pipe mounting seats 4 can be sealed with a plug 11.

[0020] A water outlet pipe mounting seat 5 is provided in at least two directions of the water outlet chamber. Specifically, a water outlet pipe mounting seat 5 is provided in a direction where the water outlet chamber is adjacent to the heat exchange chamber 2 and adjacent to the water inlet chamber; and a water outlet pipe mounting seat 5 is provided in a direction where the water outlet chamber is facing away from the heat exchange chamber 2, so that the water outlet chamber of the oil cooler can be selectively connected to the water outlet pipe connector 13 in two directions. In actual use, the water outlet pipe mounting seat 5 that is not connected to the water outlet pipe connector 13 can be selectively connected to the water inlet seat 8. In this embodiment, the oil pipe mounting seat 6 is provided on the side of the water chamber 1 away from the heat exchange chamber 2. Specifically, two oil pipe mounting seats 6 are provided, and are distributed at both ends of the water chamber 1, and are respectively used to connect the oil pipe connectors 10 of the oil inlet pipe and the oil outlet pipe. A degassing pipe mounting seat 7 is also provided on the shell body on the side of the water chamber 1 facing away from the heat exchange chamber 2, so that the degassing pipe connector 9 is connected using the degassing pipe mounting seat 7.

[0021] Embodiment 2: A method for producing an oil cooler for an aviation piston engine, comprising the following steps: S1. Prepare a shell and a connector of the oil cooler, wherein the shell is fixedly connected with a mounting seat threadedly matched with the connector. In this embodiment, the shell of the oil cooler is a universal component, and the specific structure of the shell is described in the first embodiment.

[0022] S2, applying sealant to the threaded surfaces of the corresponding mounting seat and connector, then connecting the connector to the mounting seat, and adjusting the position of the connector to the designed position for positioning. In this embodiment, before applying sealant to the threaded surfaces of the mounting seat and connector, first use an accelerator compatible with the sealant to spray the threaded surfaces and then dry them. The drying method can be standing and blowing dry.

[0023] S3, curing the sealant between the mounting seat and the connector to connect and fix the connector to the mounting seat. Specifically, the oil cooler coated with the sealant is placed in a constant temperature box together with the positioning tooling, and the curing operation is performed according to the technical requirements of the sealant.

[0024] Finally, the connection strength and sealing of the cured oil cooler are tested.

[0025] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An oil cooler for an aviation piston engine, comprising a shell having a heat exchange chamber and a water chamber, the shell being provided with a through hole communicating with the interior of the shell, and the exterior of the shell being provided with a connector corresponding to the through hole, characterized in that: A mounting seat is fixedly connected to the through hole of the shell, a matching thread is arranged between the connecting head and the mounting seat, and the connecting head and the mounting seat are sealed and bonded and fixed.

2. The oil cooler for an aviation piston engine according to claim 1, characterized in that: The matching threads between the connector and the mounting seat are sealed and bonded with sealant.

3. The oil cooler for an aviation piston engine according to claim 2, characterized in that: A sealing ring is also arranged between the mounting seat and the connecting head.

4. An oil cooler for an aviation piston engine according to claim 1, 2 or 3, characterized in that: The mounting seat includes an inlet pipe mounting seat and an outlet pipe mounting seat, the water chamber includes an inlet cavity and an outlet cavity, and inlet pipe mounting seats are arranged in at least three directions of the inlet cavity adjacent to the heat exchange chamber, and outlet pipe mounting seats are arranged in at least two directions of the outlet cavity.

5. The oil cooler for an aviation piston engine according to claim 4, characterized in that: The mounting seat also includes an oil pipe mounting seat, and the oil pipe mounting seat is arranged on a side of the water chamber away from the heat exchange chamber.

6. A method for producing an aircraft engine oil cooler according to any one of claims 1 to 5, comprising the following steps: S1. Prepare a housing and a connector of an oil cooler, wherein the housing is fixedly connected to a mounting seat threadedly matched with the connector; S2. Apply sealant to the threaded surfaces of the corresponding mounting seat and connector, then connect the connector to the mounting seat, and adjust the connector to the designed position for positioning; S3. Curing the sealant between the mounting seat and the connector to securely connect the connector to the mounting seat.

7. The method for producing an oil cooler for an aviation piston engine according to claim 6, characterized in that: In the step S1, the connector includes a variety of connectors that are compatible with the housing, and a corresponding connector is selected to match the housing as needed.

8. The method for producing an oil cooler for an aviation piston engine according to claim 7, characterized in that: In the step S2, before applying the sealant to the threaded surfaces of the mounting seat and the connector, an accelerator compatible with the sealant is first sprayed on the threaded surfaces and then dried.

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