Spraying type oil cooling structure of permanent magnet starter generator

Abstract

The utility model provides a spraying type oil cooling structure of a permanent magnet starter generator. The spraying type oil cooling structure comprises an engine and a motor, one end of a motor casing of the motor is connected with an engine casing of the engine, and the other end of the motor casing is connected with an engine casing part of the engine; the interior of the motor shell is connected with an armature through an armature retaining shoulder, an engine rotating shaft of the engine is connected with a motor rotor of the motor through a key, and an oil nozzle is mounted on an engine case; a bearing I and a bearing II are installed on the engine rotating shaft, and one end of the oil nozzle is connected with a switching oil pipe. According to the utility model, a spray type oil cooling oil nozzle structure and an oil path in a power generation state are designed according to the structure and layout of the motor, so that the heat dissipation and cooling effect of the motor is improved, the stability and practical value of the motor are improved, and reference and guidance are provided for heat dissipation and cooling of motors with similar structures.

Description

Technical Field

[0001] The utility model relates to a spray oil cooling structure of a permanent magnet starter generator, belonging to the technical field of oil cooled motors in aviation Background Art

[0002] With the rapid development of the national aerospace field, the demand and requirements for engines are constantly increasing, which also increases the demand for supporting components such as motors. Among them, the starter generator plays an extremely important role due to its performance of both starting and generating electricity. The permanent magnet starter generator has a simple structure and stable performance, so it is widely used in the aerospace field and other fields.

[0003] Currently, for small-volume, high-speed, and high-power starter generators, when acting as a generator to provide power for the engine system, the motor works for a long time, has a high temperature, and is difficult to dissipate heat. The high temperature will affect the stability of the motor operation and there is a risk of fire and other accidents. Therefore, currently, solving the heat dissipation and cooling problems of small-volume, high-speed, and high-power starter generators is a technical difficulty and key point. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a spray oil cooling structure of a permanent magnet starter generator, and this spray oil cooling structure of the permanent magnet starter generator is for a small-volume, high-speed, and high-power starter generator.

[0005] The utility model is achieved through the following technical solutions.

[0006] The spray oil cooling structure of a permanent magnet starter generator provided by the utility model includes an engine and a motor; one end of the motor housing of the motor is connected to the engine casing of the engine, and the other end is connected to the engine casing component of the engine; an armature is connected inside the motor housing through an armature shoulder, the engine rotating shaft of the engine is key-connected to the motor rotor of the motor, and an oil injector is installed on the engine casing; a bearing I and a bearing II are installed on the engine rotating shaft, and one end of the oil injector is connected with a transfer oil pipe.

[0007] The engine casing is connected to the motor housing through screws.

[0008] One end of the bearing I is provided with an upper shoulder of the bearing I and a lower shoulder of the bearing I, and the other end is provided with a bush, and the bearing I is axially limited through the engine casing component, the upper shoulder of the bearing I, the lower shoulder of the bearing I, and the bush.

[0009] One end of the bearing II is provided with a bushing, and the other end is provided with a shoulder of the bearing II, and the bearing II is axially limited through the bushing and the shoulder of the bearing II.

[0010] Sealing rings are provided at the joints of the fuel injector with the engine casing and the adapter oil pipe.

[0011] The nozzle of the fuel injector is a structure of an oil pipe axially extending from a ring.

[0012] Two fuel injection holes are provided on the lower side of the oil pipe, and one fuel injection hole is provided on the left side.

[0013] A groove for circulating lubricating oil is provided between the motor housing and the engine casing component.

[0014] The beneficial effects of the present utility model are as follows: aiming at the structure and layout of the motor, the fuel injector structure and oil circuit of the spray-type oil cooling in the power generation state are designed, so as to improve the heat dissipation and cooling effect of the motor, achieve the effect of improving the stability and practical value of the motor, and provide reference and guidance for the heat dissipation and cooling of motors with similar structures. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic diagram of the oil circuit of the present utility model;

[0017] Figure 3 is a partial view of the housing oil circuit of the present utility model;

[0018] Figure 4 is a schematic structural diagram of the fuel injector of the present utility model;

[0019] Figure 5 is Figure 4 a cross-sectional view taken along the A-A direction in

[0020] Figure 6 is a partial view of the fuel injector of the present utility model;

[0021] In the figure: 1 - engine casing, 2 - motor housing, 3 - armature, 4 - motor rotor, 5 - engine casing component, 6 - bearing Ⅰ, 7 - upper shoulder of bearing Ⅰ, 8 - lower shoulder of bearing Ⅰ, 9 - engine rotating shaft, 10 - bush, 11 - screw, 12 - key, 13 - bushing, 14 - bearing Ⅱ, 15 - shoulder of bearing Ⅱ, 16 - fuel injector, 17 - sealing ring, 18 - adapter oil pipe, 19 - lead wire. Detailed Embodiments

[0022] The technical solution of the present utility model will be further described below, but the scope of protection claimed is not limited thereto.

[0023] As Figure 1As shown in the figure, the engine casing 1 is connected to the motor housing 2 by screws 11. The armature 3 is axially positioned by the armature shoulder inside the motor housing 2. The engine casing component 5 contacts the motor housing 2 to restrict the axial movement of the motor stator. The bearing I 6 and the bearing II 14 are installed on the engine shaft 9. The bearing I 6 is axially limited by the engine casing component 5, the upper shoulder 7 of the bearing I, the lower shoulder 8 of the bearing I, and the bush 10. The bearing II 14 is limited by the bush 13 and the shoulder 15 of the bearing II. The engine shaft 9 and the motor rotor 4 are connected by a key 12 to transmit torque. The cooled fuel injector 16 is installed on the engine casing 1 and is oil-sealed by a sealing ring 17. The transfer oil pipe 18 is the inlet for the cooling lubricating oil. The motor is connected to the controller through the lead wire 19.

[0024] As Figures 4 - 6 shown, for the design of a small-volume, high-speed, high-power starter-generator, a simple fuel injector 16 structure is designed to achieve the heat dissipation and cooling of the motor. The fuel injector 16 with an oil-cooling structure is a ring-like structure. The nozzle of the fuel injector 16 is a tubing structure axially extending from the ring. Two spray holes are opened on the lower side of the tubing, and one spray hole is opened on the left side. The lubricating oil enters from the right-side oil hole and sprays out from the left-side and lower-side spray holes. The fuel injector 16 is connected to the engine casing 1 through four screw holes, and a weight reduction design is adopted around the ring of the fuel injector 16.

[0025] As Figure 2 shown, the lubricating oil enters from the transfer oil pipe 18 as indicated by the arrow and then flows into the fuel injector 16. When the lubricating oil enters the fuel injector 16, the lubricating oil is sprayed (as Figure 2 indicated by the arrow) onto the motor rotor 4. The lubricating oil attached to the motor rotor 4 generates centrifugal force as the rotor rotates, and thus spills onto the armature 3 to achieve oil cooling of the motor. The lubricating oil sprayed from the fuel injector 16 flows out from both ends of the bearings (6 - bearing I and bearing II 14) and finally returns to the engine casing 1. The lubricating oil seal at the inlet is achieved by the four sealing rings 17 as Figure 1 shown. In addition, as Figure 1 , Figure 3 shown, a groove structure is designed on the motor housing 2 to enhance the cooling and heat dissipation effect of the motor, that is, at the contact above the motor housing 2 and the engine casing component 5, there is a groove design for the flowing lubricating oil. The lubricating oil flows in the groove to achieve the cooling of the motor, and its cooling effect is good and the cooling oil circuit structure is simple.

Claims

1. A permanent magnet generator spray oil cooling structure, comprising an engine and a motor, wherein one end of the motor housing (2) of the motor is connected to the engine casing (1) of the engine, and the other end is connected to the engine casing component (5) of the engine, characterized in that: The motor housing (2) is internally connected to an armature (3) via an armature shoulder, an engine shaft (9) of an engine is connected to a motor rotor (4) of the motor via a key (12), and an oil nozzle (16) is installed on the engine casing (1); a bearing I (6) and a bearing II (14) are installed on the engine shaft (9), and one end of the oil nozzle (16) is connected to a transfer oil pipe (18).

2. The permanent magnet generator spray oil cooling structure according to claim 1, characterized in that: The engine casing (1) is connected to the motor casing (2) via screws (11).

3. The permanent magnet generator spray oil cooling structure according to claim 1, characterized in that: One end of the bearing I (6) is provided with a bearing I upper shoulder (7) and a bearing I lower shoulder (8), and the other end is provided with a shaft bushing (10). The bearing I (6) is axially limited by the engine casing component (5), the bearing I upper shoulder (7), the bearing I lower shoulder (8), and the shaft bushing (10).

4. The spray oil cooling structure of the permanent magnet generator according to claim 1, characterized in that: One end of the bearing II (14) is provided with a shaft sleeve (13), and the other end is provided with a bearing II shoulder (15), and the bearing II (14) is axially limited by the shaft sleeve (13) and the bearing II shoulder (15).

5. The permanent magnet generator spray oil cooling structure according to claim 1, characterized in that: The connection between the oil injection nozzle (16), the engine casing (1) and the oil transfer pipe (18) is provided with a sealing ring (17).

6. The permanent magnet generator spray oil cooling structure according to claim 1, characterized in that: The oil nozzle of the oil injection nozzle (16) is an oil pipe structure extending axially from a circular ring.

7. The permanent magnet generator spray oil cooling structure according to claim 6, characterized in that: Two oil spray holes are arranged on the lower side of the oil pipe, and one oil spray hole is arranged on the left side.

8. The permanent magnet generator spray oil cooling structure according to claim 1, characterized in that: A groove for circulating lubricating oil is provided between the motor housing (2) and the engine casing component (5).

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