A dual shaft liquid immersed electric machine

Abstract

The utility model discloses a double shaft liquid immersion type motor, apply to engine fuel pump, including the casing, rear end cover, front end cover, resolver, stator part, rotor part, bearing and motor lead -out wire, rotor one end of rotor part passes through and extends out rear end cover position and is connected with the pre -booster pump shaft extension end, and the rotor of this rotor part extends to front end cover position and is connected with the main pump shaft extension end, be equipped with the oil groove between casing and stator part wall surface, the left side bottom of rear end cover is equipped with the oil inlet, the right side top of front end cover is equipped with the oil outlet, the utility model discloses adopting stator oil immersion mode cooling, has improved the heat dissipation effect of motor whole, and adopts double shaft extension end structure form, drives both ends arrangement pre -booster pump motor and main pump motor high -speed rotation, simultaneously will main pump motor and pre -booster motor merge for a motor, reduces the complexity of overall structure.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically a dual-shaft immersion motor. Background Technology

[0002] With the continuous development of engine technology, the demand for motors used in fuel pumps has increased significantly, leading to a diversification of motor types. The requirements for their performance, such as high power density and small size, are also becoming increasingly stringent. The overall structure of the motor is complex. Currently, most fuel pump systems consist of a main pump and a pre-boost pump, each driven by a separate motor. Moreover, most motors are cooled by circulating oil in the casing. While the stator can be adequately cooled by this method, the rotor temperature dissipates slowly, resulting in poor heat dissipation and making it difficult to further increase the motor's power density. To address this, a dual-shaft liquid-immersed motor is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a dual-shaft immersion motor to solve the problems of complex overall structure and poor heat dissipation of the motor used in fuel pumps mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A dual-shaft immersion motor, used in an engine fuel pump, includes a housing, a rear end cover, a front end cover, a rotary transformer, a stator assembly, a rotor assembly, bearings, and motor leads. One end of the rotor of the rotor assembly extends laterally through and out of the rear end cover and connects to the pre-boost pump shaft extension. The other end of the rotor of the rotor assembly extends laterally to the front end cover and connects to the main pump shaft extension. An oil groove is formed between the housing and the stator assembly wall. An oil inlet is formed at the bottom left side of the rear end cover, and an oil outlet is formed at the top right side of the front end cover. Both the oil inlet and outlet communicate with the inner cavity of the housing.

[0005] Furthermore, the dual-shaft immersion motor also includes a sealed terminal block and a connector. The motor leads are connected to the connector using a sealed terminal block to ensure that oil does not leak from the leads when the internal oil pressure is high.

[0006] Furthermore, the front cover is detachably connected to the right side of the housing, and the rear cover is detachably connected to the left side of the housing.

[0007] Furthermore, the joint between the outer wall of the front cover and the inner wall of the housing, as well as the joint between the outer wall of the rear cover and the inner wall of the housing, are sealed with sealing rings.

[0008] The beneficial effects of this utility model are: This invention employs stator oil immersion for cooling, which significantly improves the overall heat dissipation of the motor. It also adopts a dual-shaft extension structure to drive the pre-boost pump motor and the main pump motor arranged at both ends to rotate at high speed. At the same time, the main pump motor and the pre-boost motor are combined into one motor, reducing the complexity of the overall structure, reducing the space occupied by the motor and the number of installation interfaces, and improving the reliability of the system. Attached Figure Description

[0009] Figure 1 This is a cross-sectional view of the structure of the dual-shaft immersion motor of this utility model.

[0010] In the diagram: 1. Housing; 2. Front cover; 3. Rear cover; 4. Oil inlet; 5. Oil outlet; 6. Sealing ring; 7. Stator assembly; 8. Oil tank; 9. Rotor assembly; 10. Bearing; 11. Rotary transformer; 12. Pre-boost pump shaft extension end; 13. Main pump shaft extension end; 14. Sealing terminal block; 15. Connector. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Please see Figure 1 This invention provides a technical solution for a dual-shaft immersion motor used in an engine fuel pump. The motor includes a housing 1, a rear end cover 3, a front end cover 2, a rotary transformer 11, a stator component 7, a rotor component 9, a bearing 10, and motor leads. One end of the rotor component 9 extends laterally through the rear end cover 3 and connects to a pre-boost pump shaft extension end 12. The other end of the rotor component 9 extends laterally to the front end cover 2 and connects to a main pump shaft extension end 13. An oil groove 8 is provided between the housing 1 and the stator component 7. An oil inlet 4 is provided at the bottom left side of the rear end cover 3, and an oil outlet 5 is provided at the top right side of the front end cover 2. Both the oil outlet 5 and the oil inlet 4 communicate with the inner cavity of the housing 1 to accommodate cooling oil for cooling the stator component 7 and the housing 1.

[0013] It should be noted that the joint between the outer wall of the front cover 2 and the inner wall of the housing 1, as well as the joint between the outer wall of the rear cover 3 and the inner wall of the housing 1, are sealed with sealing rings. The overall structure of the sealing rings is an "O" shape. The sealing rings fill the gaps when the front cover 2 and the housing 1 are joined, and the gaps when the rear cover 3 and the housing 1 are joined, thereby improving the overall sealing performance of the motor and effectively preventing cooling oil from leaking outside the housing 1. The front cover 2 is detachably connected to the right side of the housing 1, and the rear cover 3 is detachably connected to the left side of the housing 1. The front cover 2 and the rear cover 3 can be detachably connected to the two sides of the housing 1 by fasteners, which are, but are not limited to, screws, bolts, or bolts.

[0014] In this embodiment, the dual-shaft immersion motor also includes a sealed terminal block 14 and a connector 15. The motor lead wires are wired using the sealed terminal block 14 and connected to the connector 15 to ensure that oil does not leak from the lead wires when the oil pressure inside the housing 1 is high.

[0015] This dual-shaft liquid-immersed motor can withstand a cooling oil pressure of at least 10MPa. To meet the motor's heat dissipation requirements, the motor is immersed in oil for cooling through the combination of oil groove 8, oil inlet 4, and oil outlet 5. This provides sufficient cooling for the main heat-generating components of the motor, thereby improving the motor's power density. An oil groove 8 is opened between the casing 1 and the stator component 7 wall to ensure that the cooling oil can pass through normally under high flow rates, reduce the pressure loss at the oil inlet 4 and oil outlet 5, and seal the motor. This dual-shaft liquid-immersed motor has a simple structure and adopts a dual-shaft extension form, which can drive two electric pumps to run simultaneously, thereby reducing system complexity. Furthermore, the pre-boost pump shaft extension end 12 and the main pump shaft extension end 13 at both ends of the motor can be connected to the fuel pump.

[0016] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0017] The above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be understood that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present utility model, and these all fall within the protection scope of the present utility model. In the present utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "joining", "fixing", etc. should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components. Among them, there are various ways of detachable installation, such as by plugging and snapping, or by bolt connection, etc.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-shaft immersion motor, used in an engine fuel pump, characterized in that: The device includes a housing, a rear end cover, a front end cover, a rotary transformer, a stator assembly, a rotor assembly, bearings, and motor leads. One end of the rotor of the rotor assembly extends laterally through the rear end cover and connects to the pre-boost pump shaft extension. The other end of the rotor of the rotor assembly extends laterally to the front end cover and connects to the main pump shaft extension. An oil groove is provided between the housing and the stator assembly wall. An oil inlet is provided at the bottom left side of the rear end cover, and an oil outlet is provided at the top right side of the front end cover. Both the oil inlet and outlet communicate with the inner cavity of the housing.

2. The dual-shaft immersion motor according to claim 1, characterized in that: It also includes a sealed terminal block and a connector. The motor lead wire is connected to the connector using a sealed terminal block to ensure that oil does not leak from the lead wire when the oil pressure inside the housing is high.

3. The dual-shaft immersion motor according to claim 1, characterized in that: The front cover is detachably connected to the right side of the housing, and the rear cover is detachably connected to the left side of the housing.

4. The dual-shaft immersion motor according to claim 1, characterized in that: The joint between the outer wall of the front cover and the inner wall of the housing, as well as the joint between the outer wall of the rear cover and the inner wall of the housing, are all sealed with sealing rings.

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