A high-power cylindrical shell motor cooling device

Abstract

This utility model discloses a cooling device for a high-power cylindrical shell motor, relating to the field of underwater unmanned submersible technology. The device consists of a spiral water chamber, an extension section, an inlet / outlet water circulation assembly, and connecting components. The spiral water chamber includes a cylindrical tube (10), spiral blades (11), and a sealing flange (7). The inlet / outlet water circulation assembly includes a water pipe, a circulation pump (15), a cooler (16), and inlet / outlet water connectors. The extension section (1) is installed at both ends of an integrated cylindrical shell motor (3). When in use, this device is mounted on the casing of a high-power cylindrical shell motor for cooling during land-based load testing. Water is directly flushed onto the motor casing, resulting in high cooling efficiency and closely approximating the actual operating environment of the motor. The spiral water chamber design allows water to flow along a designed path for cooling, resulting in lower flow resistance and more uniform cooling. By combining an external cooler and a pressurized water pump circulation system, the cooling performance can be maintained stably for extended periods.

Description

Technical Field

[0001] This utility model relates to the field of underwater unmanned submersible technology, and in particular to a high-power cylindrical shell motor cooling device. Background Technology

[0002] Underwater vehicles have limited space, so to achieve greater propulsion power, they are often equipped with high-power electric motors as power conversion components. Electric motors have limited efficiency; they cannot convert 100% of the input electrical energy into mechanical energy. Therefore, the higher the power, the greater the heat generated. When the heat generation exceeds the heat dissipation, the motor temperature will continue to rise, potentially leading to problems such as demagnetization of permanent magnets and short circuits in the coils. Therefore, heat dissipation is a key issue that high-power motors must address.

[0003] To meet the heat dissipation requirements of the motor, improve space utilization, and increase the power density of the motor, the motor housing is sometimes integrated with the submarine housing, and the water flow outside the submarine housing during operation is used to cool the motor directly, thereby enhancing the motor's heat dissipation capacity.

[0004] However, when this type of high-power motor with an integrated casing is subjected to land-based loading tests (horsepower tests), its temperature will rise sharply due to the lack of continuous water flow washing over the casing, making it impossible to carry out long-term loading. Moreover, the heat dissipation environment of the motor during loading is very different from the actual environment.

[0005] To simulate the real-world environment of integrated-shell motors and enhance their heat dissipation during load testing, enabling them to withstand long-term stable load testing, a high-power cylindrical-shell motor cooling device is needed. Summary of the Invention

[0006] The purpose of this utility model is to provide a cooling device for a high-power cylindrical housing motor, which is used to dissipate heat from the motor during the loading test of the integrated cylindrical housing motor. It can also simulate the real environment of the actual application of the integrated housing motor, enhance the heat dissipation capacity of the motor during the load test, and enable the motor to be stably loaded for a long time.

[0007] The technical solution proposed in this utility model is implemented as follows: A high-power cylindrical shell motor cooling device is composed of a spiral water chamber, an extension section (1), an inlet and outlet water circulation assembly and a connecting assembly. The spiral water chamber includes a cylindrical tube (10), a spiral blade partition (11) and a sealing flange (7). The inner wall of the cylindrical tube (10) is machined with a spiral groove, and a spiral blade partition is installed in the groove. One side of the spiral blade partition (11) is embedded in the spiral groove of the inner wall of the cylindrical tube (10), and the other side is installed and closely attached to the motor shell (2). The two ends of the cylindrical tube are respectively connected to a sealing flange with screws. An O-ring 3 (8) is installed at the contact point between the inner ring of the sealing flange and the motor shell. The water circulation assembly includes a circulation pump (15), a cooler (16), an inlet pipe (14), and an outlet pipe (17). The outlet of the cooler (16) is connected to the inlet of the circulation pump (15). The outlet of the circulation pump (15) is connected to the inlet connector (12) of the spiral water chamber cylinder (10) through the inlet pipe (14). The outlet connector (9) of the spiral water chamber cylinder (10) is connected to the outlet pipe (17). The outlet pipe (17) is connected to the inlet of the cooler (16) to form a circulation pipeline. The extension section (1) includes two sections. The two extension sections (1) are respectively installed at both ends of the integrated motor (3) and fixed with screws 1 (5) to extend the motor housing (2). An O-ring seal 1 (4) is installed between the motor housing (2) and the extension section (1). The spiral blade baffle (11) is made of PVC material. Multiple ring-shaped PVC materials are used, with one side embedded in the spiral groove of the inner wall of the cylindrical tube (10). Each piece is glued at the end with PVC glue to form a spiral whole. A spiral water channel is formed between the motor housing (2), the inner wall of the cylindrical tube (10), and the spiral blade baffle (11). There is an internal pipe thread at the top of each end of the cylindrical tube (10). Copper pipe fittings are installed in the internal pipe threads to form the water inlet connector (12) and the water outlet connector (9).

[0008] Working Principle / Mechanism: This utility model relates to a high-power cylindrical casing motor cooling device, used to dissipate heat from the motor during load testing of an integrated cylindrical casing motor. The device consists of a spiral water chamber enclosing the cylindrical casing of the motor, with flowing water or other working fluid circulating within for cooling. For ease of access, ordinary water is generally used. Within the spiral water chamber, the water flows gradually from one end of the motor casing to the other along a pre-machined spiral path, carrying away heat from the motor casing and turning it into hot water. This hot water then flows to an external cooler for further cooling. After cooling, the water is pressurized by a pump and re-enters the spiral water chamber, continuously circulating the system.

[0009] The spiral water chamber consists of a cylindrical tube and two sealing flanges. The cylindrical tube is the core component, with spiral grooves machined into its interior. Multiple spiral baffles, made of bonded PVC plastic, are installed within these grooves, forming a spiral water channel. The inner diameter of the spiral baffles is approximately equal to the diameter of the motor housing, ensuring that water flows along a spiral path rather than passing directly through gaps. Each end of the cylindrical tube has an internal thread machined to install brass pipe fittings as the inlet and outlet. Each end of the cylindrical tube is connected to a sealing flange using screws, with O-rings for sealing. An O-ring is also designed at the contact point between the inner ring of the sealing flange and the motor housing to prevent cooling water from overflowing after entering the spiral water chamber.

[0010] The device has two cylindrical transition sections (extension sections) for extending the motor housing. This allows the relatively short motor housing to be extended to facilitate the installation of the device's spiral water chamber, eliminating any dead cooling angles in the entire motor housing. When the cylindrical transition sections are connected to the motor housing, O-rings are used for sealing, making the extension and the motor housing a watertight unit. This ensures that when water is added to the outer surface of the entire cylindrical housing for cooling, moisture will not seep into the motor and cause a hazard.

[0011] This device is used for cooling high-power cylindrical housing motors during land-based load testing. By extending the motor housing, the entire motor housing can be cooled. Water is used to directly wash the motor housing, resulting in high cooling efficiency and closely mimicking the real-world environment of the motor's application. The spiral water chamber design allows the water to flow along a designed path for cooling, resulting in lower flow resistance and more uniform cooling. By combining an external cooler and a pressurized water pump circulation system, the cooling performance can remain stable for extended periods.

[0012] The beneficial effects of this utility model are as follows: 1. Water is used as the cooling medium, which is simple, readily available, and low in cost. 2. Water is used as the cooling medium and acts directly on the motor housing without any intermediate layers, which is closer to the actual operating environment of the motor and results in high cooling efficiency. 3. The cooling water can be circulated after being cooled by an external cooler, saving water resources. 4. The spiral waterway design allows water to flow along a spiral path, resulting in low flow resistance and energy savings. 5. The inlet and outlet are designed at the beginning and end of the spiral waterway, respectively, and extended through a cylindrical transition section, allowing water to flow across the entire cylindrical surface of the motor housing, ensuring cooling without dead zones. 6. The cooling power can be adjusted by regulating the water flow rate according to the water pump, simulating the water flow speed at different speeds of a submarine, demonstrating great cooling potential. 7. PVC material is embedded in the spiral groove and bonded together to serve as a spiral waterway partition, which is inexpensive and easy to install. Furthermore, PVC has a certain degree of self-lubrication, preventing scratches on the motor housing surface when installed. Attached Figure Description

[0013] Figure 1A schematic diagram of an extended motor housing in a high-power cylindrical housing motor cooling device; Figure 2 A schematic diagram of the composition and operation of a high-power cylindrical casing motor cooling device (Method 1); Figure 3 A schematic diagram of the composition and operation of a high-power cylindrical casing motor cooling device (Method 2); In the diagram: 1-Extension section, 2-Motor housing, 3-Integrated housing motor, 4-O-ring 1, 5-Screw 1, 6-O-ring 2, 7-Sealing flange, 8-O-ring 3, 9-Outlet connector, 10-Cylindrical tube, 11-Waterway baffle, 12-Inlet connector, 13-Screw 2, 14-Inlet pipe, 15-Circulating pump, 16-Cooler, 17-Outlet pipe. Detailed Implementation

[0014] The technical solution and advantages of this utility model will be further described below with reference to the accompanying drawings and embodiments. As shown in the figures: Example 1: The installation method of a high-power cylindrical casing motor cooling device is as follows: Install the two extension sections (1) at both ends of the integrated motor (3) and fix them with screws 1 (5). Extend the motor housing (2) and install O-rings 1 (4) between the motor housing (2) and the extension section (1) to ensure a seal.

[0015] Spiral grooves are machined on the inner wall of the cylindrical tube (10). A single annular PVC water channel baffle (11) is bent into a spiral shape and installed along the spiral groove inside the cylindrical tube (10). Multiple water channel baffles are bonded together with PVC glue to form a whole spiral shape. After installing the inlet connector (12) and outlet connector (9) on the cylindrical tube (10), a sealing flange (7) is installed at each end. The cylindrical tube (10) and the sealing flange (7) are fixed by screws 2 (13), and an O-ring 3 (8) is installed between them for sealing. After placing the O-ring 2 (6) inside the sealing flange (7), insert the cylindrical tube (10) and the sealing flange (7) from one end of the extension section (1) through the chamfer and move it gradually so that the cylindrical tube (10) is in the center of the motor housing (2). Then connect the outlet of the cooler (16) to the inlet of the circulating pump (15). The outlet of the circulating pump (15) is connected to the inlet connector (12) of the cylindrical tube (10) through the inlet pipe (14). The outlet connector (9) of the cylindrical tube (10) is connected to the outlet pipe (17). Finally, the outlet pipe (17) is connected to the inlet of the cooler (16) to complete the circulation pipeline.

[0016] A high-power cylindrical housing motor cooling device has two operating modes: Method 1: By starting the circulating pump, the circulating water comes out of the cooler and is pressurized by the circulating pump. It enters the cylindrical tube (10) through the water inlet connector (12). It moves forward along the spiral water channel in the spiral water chamber. During the process, it carries away the heat on the surface of the motor housing (2). Then it reaches the water outlet connector (9) of the spiral water chamber. Then it reaches the cooler (16) under pressure for cooling. The above process is repeated continuously.

[0017] Method 2: When a cooler (16) and a circulating pump (15) are not available, this cooling device can also be operated directly using the tap water network system without circulation. That is, pressurized tap water enters the cylindrical cylinder (10) through the inlet connector (12), and moves continuously along the spiral water channel in the spiral water chamber. During the process, it carries away the heat on the surface of the motor housing (2), and then reaches the outlet connector (9) of the spiral water chamber and is discharged into the sewer. However, this operating method wastes more water resources than the circulation method.

Claims

1. A cooling device for a high-power cylindrical casing motor, characterized in that: It consists of a spiral water chamber, an extension section (1), an inlet and outlet water circulation assembly and a connecting assembly. The spiral water chamber includes a cylindrical tube (10), a spiral blade partition (11) and a sealing flange (7). The inner wall of the cylindrical tube (10) is machined with a spiral groove, and a spiral blade partition is installed in the groove. One side of the spiral blade partition (11) is embedded in the spiral groove on the inner wall of the cylindrical tube (10), and the other side is installed and closely attached to the motor housing (2). Both ends of the cylindrical tube are connected to a sealing flange with screws. An O-ring 3 (8) is installed at the contact point between the inner ring of the sealing flange and the motor housing.

2. The high-power cylindrical housing motor cooling device according to claim 1, characterized in that: The water circulation assembly includes a circulation pump (15), a cooler (16), an inlet pipe (14), and an outlet pipe (17). The outlet of the cooler (16) is connected to the inlet of the circulation pump (15). The outlet of the circulation pump (15) is connected to the inlet connector (12) of the spiral water chamber cylinder (10) through the inlet pipe (14). The outlet connector (9) of the spiral water chamber cylinder (10) is connected to the outlet pipe (17). The outlet pipe (17) is connected to the inlet of the cooler (16) to form a circulation pipeline.

3. The high-power cylindrical housing motor cooling device according to claim 1, characterized in that: The extension section (1) consists of two sections. The two extension sections (1) are installed at both ends of the integrated motor (3) and fixed with screws 1 (5) to extend the motor housing (2). An O-ring seal 1 (4) is installed between the motor housing (2) and the extension section (1).

4. The high-power cylindrical housing motor cooling device according to claim 1, characterized in that: The spiral blade partition (11) is made of PVC material. Multiple ring-shaped PVC materials are used, and one side is embedded in the spiral groove of the inner wall of the cylindrical tube (10). Each piece is glued with PVC glue at the end to form a spiral whole. A spiral waterway is formed between the motor housing (2), the inner wall of the cylindrical tube (10) and the spiral blade partition (11).

5. The high-power cylindrical housing motor cooling device according to claim 1, characterized in that: A pipe thread is opened at the top of each end of the cylindrical tube (10), and a copper pipe fitting is installed on the pipe thread to form a water inlet fitting (12) and a water outlet fitting (9).

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