Split type electronic water pump

Abstract

The utility model provides a kind of split type electronic water pump, including pump head assembly, connecting disc assembly, motor assembly and control assembly, pump head assembly includes pump head, water inlet and water outlet, connecting disc assembly is provided with impeller between pump head assembly, motor assembly includes casing, motor stator assembly, water-tight compartment and motor rotor assembly, motor rotor assembly includes permanent magnet, rotor core and machine shaft, the top of machine shaft is detachably connected with impeller;Through the detachable connection between impeller and motor rotor, split type structure is formed, avoid when impeller or motor rotor is damaged or fails, the overall failure of water pump, lead to water pump scrap, reduce the maintenance and replacement cost of equipment;The overall platform of other components outside initial impeller can change the flow of water pump by replacing single circle flow different impeller, meet the medium flow and lift demand required by thermal management system, reduce design cost and use cost, power consumption is lower, save whole vehicle electric energy.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to a split-type electronic water pump. Background Technology

[0002] Traditional water pumps typically encapsulate multiple core components (such as motor, frequency converter, pump head, impeller, and rotor) into a single unit.

[0003] When a traditional water pump malfunctions, due to its enclosed structure, internal issues such as rotor dynamic balance and impeller slippage are difficult to observe and detect directly, making fault diagnosis and maintenance challenging. Therefore, it requires specialized tools and knowledge to troubleshoot the fault. Ordinary users or technicians cannot handle it themselves. When the internal rotor or impeller is damaged, it is usually impossible to replace it individually; the entire component must be replaced, resulting in high maintenance costs.

[0004] Furthermore, existing water pumps can only adjust the flow rate within a limited range. If a larger flow rate is required, a more powerful water pump must be replaced. This cannot meet the medium flow rate and head requirements of the thermal management system, thus increasing operating costs. Utility Model Content

[0005] The present invention aims to provide a split-type electronic water pump, which allows for individual impeller replacement to change the pump's flow rate, thereby meeting the medium flow rate and head requirements of the thermal management system and reducing design and operating costs.

[0006] Therefore, the technical solution adopted by this utility model is as follows: a split-type electronic water pump, comprising a pump head assembly, a connecting plate assembly, and a motor assembly arranged sequentially from front to back. The motor assembly includes a housing, a motor stator assembly, a water-proof chamber, and a motor rotor assembly arranged sequentially from the outside to the inside. The pump head assembly includes a pump head connected to the housing, a water inlet located at the front end of the pump head, and a water outlet located on the right side of the pump head. An impeller is arranged between the connecting plate assembly and the pump head assembly. The motor rotor assembly includes a permanent magnet, a rotor core, and a shaft arranged sequentially from the outside to the inside of the water-proof chamber. The top end of the shaft is threadedly connected to the impeller, and the rotation direction of the impeller is opposite to the thread locking direction.

[0007] As a preferred embodiment of the above solution, the connecting plate assembly includes a connecting plate disposed between the pump head and the housing, a pump head sealing ring is provided at the connection between the upper part of the connecting plate and the inner wall of the pump head, a connecting plate sealing ring is provided at the connection between the lower part of the connecting plate and the inner wall of the housing, and a water-proof chamber sealing ring is provided at the connection between the upper end face of the water-proof chamber and the lower part of the connecting plate.

[0008] More preferably, the motor stator assembly includes a stator core disposed outside the waterproof chamber, and stator windings are axially wound around the stator core.

[0009] More preferably, the permanent magnet body is provided with a rotor plastic-coated part, the rear end of the machine shaft is provided with a first bearing connected to the water-proof chamber, a first gasket is provided between the first bearing and the rotor plastic-coated part, a flat key for transmitting power is provided between the machine shaft and the rotor core, the front end of the machine shaft is provided with a second bearing connected to the connecting plate, and a second gasket is provided between the second bearing and the machine shaft step.

[0010] More preferably, the impeller has a nut insert installed inside for threaded connection with the machine shaft.

[0011] The beneficial effects of this utility model are as follows: By connecting the impeller and the motor rotor by threads to form a split structure, the overall failure of the water pump is avoided when the impeller or the motor rotor is damaged or fails, thus reducing the maintenance and replacement costs of the equipment; moreover, the rotation direction of the impeller is opposite to the direction of the threaded locking, which ensures that the impeller and the shaft are locked together during operation, preventing the impeller from loosening; by manufacturing the other parts of the water pump as a whole, the flow rate of the water pump can be changed by replacing impellers with different single-turn flow rates, which can meet the medium flow rate and head requirements of the thermal management system, reducing design and operating costs, lowering power consumption, and saving the vehicle's total energy. Attached Figure Description

[0012] Figure 1 This is a top view of the structure of this utility model (rotated 90° counterclockwise).

[0013] Figure 2 This is a front view of the present invention.

[0014] Figure 3 This is a side view of the present invention. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figures 1-3 As shown, a split-type electronic water pump includes a pump head 1 assembly, a connecting plate 32 assembly, and a motor assembly arranged sequentially from front to back. The motor assembly includes a housing 13, a motor stator assembly, a water-proof chamber 28, and a motor rotor assembly arranged sequentially from the outside to the inside. The pump head 1 assembly includes a pump head 1 connected to the housing 13, an inlet located at the front end of the pump head 1, and an outlet located on the right side of the pump head 1. An impeller 2 is arranged between the connecting plate 32 assembly and the pump head 1 assembly. The motor rotor assembly includes a permanent magnet 22, a rotor core 21, and a shaft 3 arranged sequentially from the outside to the inside within the water-proof chamber 28. The top end of the shaft 3 is threadedly connected to the impeller 2, and the rotation direction of the impeller 2 is opposite to the threaded locking direction.

[0017] The connecting plate 32 assembly includes a connecting plate 32 disposed between the pump head 1 and the housing 13. A pump head sealing ring 31 is provided at the connection between the upper part of the connecting plate 32 and the inner wall of the pump head 1, a connecting plate sealing ring 30 is provided at the connection between the lower part of the connecting plate 32 and the inner wall of the housing 13, and a water-proof chamber sealing ring 29 is provided at the connection between the upper end face of the water-proof chamber 28 and the lower part of the connecting plate 32.

[0018] The motor stator assembly includes a stator core 7 disposed outside the water-proof chamber 28, a stator winding 6 axially wound around the stator core 7, and the stator winding 6 is wound on the upper frame 24 and the lower frame 19 at the upper and lower ends of the stator core 7.

[0019] The permanent magnet 22 is provided with a rotor plastic coating 23. The rear end of the shaft 3 is provided with a first bearing connected to the water-proof chamber 28. A first shim is provided between the first bearing and the rotor plastic coating 23. A flat key 8 for transmitting power is provided between the shaft 3 and the rotor core 21. The front end of the shaft 3 is provided with a second bearing connected to the connecting plate 32. A second shim is provided between the second bearing and the step of the shaft 3.

[0020] The impeller 2 has a nut insert installed inside for threaded connection with the shaft 3. The nut insert improves the strength and stability of the threaded connection.

[0021] The control assembly includes a controller 10 and a rear cover connected to the rear end of the housing 13. A mounting cavity for mounting the controller 10 is formed between the rear cover and the housing 13. The mounting cavity is filled with potting compound 11 for fixing the controller 10 and its electronic components. A rear cover sealing ring 16 is provided between the rear cover and the housing 13. The controller 10 is connected to the pump head 1, the connecting plate 32, and the housing 13 by mounting screws 5 via three-phase stator pins 18. The rear cover is connected to the housing 13 by rear cover mounting screws 15. The controller 10 is connected to the housing 13 by controller mounting screws 17. The water-proof chamber 28 is connected to the connecting plate 32 by water-proof chamber mounting screws 26.

[0022] The impeller 2 rotates in the opposite direction to the threaded locking direction. The threaded hole on the impeller 2 and the threaded rod on the shaft 3 become tighter and tighter as they rotate. Traditional water pumps adjust the flow rate through the controller 10, but the adjustment range is limited to the overall power range. By making the impeller 2 detachable, different impellers can be replaced, allowing the water pump flow rate to exceed the power range of the controller 10, thus increasing the power. If the water pump flow rate cannot be further increased by the controller 10 alone, the power can also be increased by adjusting the number of turns of the motor stator.

[0023] The rear end of the housing 13 is connected to the insert assembly 14, and the insert assembly 14 and the housing 13 are provided with an insert assembly sealing ring 12. The housing 13 is provided with a mounting bracket 25 for mounting the water pump on the vehicle and is connected to the lower frame 19 of the stator winding 6.

[0024] By connecting the impeller 2 to the motor rotor via a threaded connection, a split structure is formed. This prevents the entire water pump from failing and becoming unusable if either the impeller 2 or the motor rotor is damaged or malfunctions, thus reducing equipment maintenance and replacement costs. Furthermore, the rotation direction of the impeller 2 is opposite to the threaded locking direction, ensuring that the impeller 2 is locked to the shaft 3 during operation, preventing the impeller 2 from loosening. By manufacturing all other components of the water pump as a single unit, the water pump flow rate can be changed by replacing the impeller 2 with one of different single-turn flow rates, meeting the medium flow rate and head requirements of the thermal management system. This reduces design and operating costs, lowers power consumption, and saves overall vehicle energy.

[0025] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A split-type electronic water pump, characterized in that: The device includes a pump head (1) assembly, a connecting plate (32) assembly, and a motor assembly arranged sequentially from front to back. The motor assembly includes a housing (13), a motor stator assembly, a water-proof chamber (28), and a motor rotor assembly arranged sequentially from the outside to the inside. The pump head (1) assembly includes a pump head (1) connected to the housing (13), an inlet located at the front end of the pump head (1), and an outlet located on the right side of the pump head (1). An impeller (2) is arranged between the connecting plate (32) assembly and the pump head (1) assembly. The motor rotor assembly includes a permanent magnet (22), a rotor core (21), and a shaft (3) arranged sequentially from the outside to the inside within the water-proof chamber (28). The top end of the shaft (3) is threadedly connected to the impeller (2), and the rotation direction of the impeller (2) is opposite to the threaded locking direction.

2. A split-type electronic water pump according to claim 1, characterized in that: The connecting plate (32) assembly includes a connecting plate (32) disposed between the pump head (1) and the housing (13). A pump head sealing ring (31) is provided at the connection between the upper part of the connecting plate (32) and the inner wall of the pump head (1). A connecting plate sealing ring (30) is provided at the connection between the lower part of the connecting plate (32) and the inner wall of the housing (13). A water-proof chamber sealing ring (29) is provided at the connection between the upper end face of the water-proof chamber (28) and the lower part of the connecting plate (32).

3. A split-type electronic water pump according to claim 1, characterized in that: The motor stator assembly includes a stator core (7) disposed outside the water-proof chamber (28), and a stator winding (6) is axially wound around the stator core (7).

4. A split-type electronic water pump according to claim 3, characterized in that: The permanent magnet (22) is provided with a rotor plastic coating (23). The rear end of the shaft (3) is provided with a first bearing (9) connected to the water-proof chamber (28). A first gasket (20) is provided between the first bearing (9) and the rotor plastic coating (23). A flat key (8) for transmitting power is provided between the shaft (3) and the rotor core (21). The front end of the shaft (3) is provided with a second bearing (4) connected to the connecting plate (32). A second gasket (27) is provided between the second bearing (4) and the step of the shaft (3).

5. A split-type electronic water pump according to claim 1, characterized in that: The impeller (2) is internally fitted with a nut insert for threaded connection with the shaft (3).

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