Double-winding low-voltage motor pump

Abstract

The invention relates to the field of motor pumps, in particular to a duplex-winding low-voltage motor pump. The double-low-pressure integrated controller and the hydraulic steering pump are connected to the two ends of the driving motor respectively. The driving motor comprises a double-winding stator assembly and a rotor assembly rotationally arranged on the inner side of the double-winding stator assembly, the input end of the hydraulic steering pump is connected with the rotor assembly, the hydraulic steering pump is provided with an oil inlet and an oil outlet, the double-low-pressure integrated controller comprises two sub-controllers, the double-winding stator assembly comprises two sets of stator coil windings, and the double-winding stator assembly comprises two sets of stator coil windings. And the two sub-controllers are respectively in control connection with the two sets of stator coil windings. The hydraulic steering pump is provided with the two sets of stator coil windings capable of running simultaneously or independently, when one set of stator coil winding breaks down, the other set of stator coil winding can be kept in the running state, the hydraulic steering pump is effectively driven by driving the rotor assembly to provide hydraulic steering assistance for a vehicle, and driving safety is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of motor pumps, in particular to a double-winding low-voltage motor pump. Background Art

[0002] The steering systems of existing commercial vehicles are all hydraulic systems, and the hydraulic pressure is driven by the engine or drive motor to drive the hydraulic oil pump. Due to the large engine speed range of traditional vehicles, usually 500-3200rpm, the hydraulic oil pump needs to consider the output flow demand when the engine is idling and must use a larger flow rate. When the engine is running at high speed, the product power consumption is greater due to the large displacement; in the electric hydraulic steering gear of the new energy vehicle system, when the controller calibration is not comprehensive and the steering working conditions are incomplete, there will be occasional problems of stalling, the stator coil winding of the drive motor fails, causing the drive motor to fail, the hydraulic oil pump cannot be driven, the steering system directly loses hydraulic power, and the steering hand force varies greatly, threatening the driving safety of the vehicle. Summary of the invention

[0003] The purpose of the present invention is to address the problems existing in the background technology and to propose a dual-winding low-voltage motor pump, which has two sets of stator coil windings that can operate simultaneously or individually. When one set of stator coil windings fails, the other set of stator coil windings can remain in operation, and the hydraulic steering pump can be effectively driven by driving the rotor assembly to provide hydraulic steering assistance to the vehicle, thereby ensuring driving safety.

[0004] The technical solution of the present invention is a dual-winding low-voltage motor pump, comprising a driving motor and a dual low-voltage integrated controller and a hydraulic steering pump respectively connected to both ends of the driving motor; the driving motor comprises a dual-winding stator assembly and a rotor assembly rotatably arranged inside the dual-winding stator assembly, the input end of the hydraulic steering pump is connected to the rotor assembly, the hydraulic steering pump has an oil inlet and an oil outlet, the dual low-voltage integrated controller comprises two sub-controllers, the dual-winding stator assembly comprises two sets of stator coil windings, and the two sub-controllers are respectively controlled and connected to the two sets of stator coil windings.

[0005] Preferably, a power plug-in is integrated at the upper front end of the dual low-voltage integrated controller, and a fixing point for pairing with a plug harness is provided at the lower front end.

[0006] Preferably, the drive motor further comprises a rear cover and a front cover respectively connected to both ends of the dual-winding stator assembly, the rear cover is connected to the dual low-voltage integrated controller, and the front cover is connected to the hydraulic steering pump.

[0007] Preferably, a double equipotential grounding hole is provided on the rear cover.

[0008] Preferably, the three-phase input ends of the two sets of stator coil windings are equipped with three-phase positioning injection molding positioning sleeves to position the three-phase terminals.

[0009] Preferably, the rigid drive connection shaft between the rotor assembly and the hydraulic steering pump is oil lubricated, and a grease filling hole is provided on the front cover.

[0010] Preferably, the output powers of the two sets of stator coil windings when running simultaneously are the same.

[0011] Preferably, when the rotor assembly of the drive motor rotates and outputs, the two sets of stator coil windings of the dual-winding stator assembly output together, control the rotation and operation of the same rotor assembly, and output full power; when one set of stator coil windings fails, the other set of stator coil windings drives the rotor assembly to operate, the flow rate of the hydraulic steering pump remains unchanged, the output power is halved, and the output pressure is halved.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects:

[0013] The present invention has two sets of stator coil windings that can operate simultaneously or independently. When one set of stator coil windings fails, the other set of stator coil windings can maintain an operating state, and the hydraulic steering pump is effectively driven by driving the rotor assembly. The hydraulic steering system is used to provide hydraulic steering assistance for the vehicle. Under the premise of ensuring that the steering hand force of the system remains unchanged, only the steering angle of the vehicle is reduced, the safety function level of the steering system is improved, and driving safety is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0015] Figure 2 It is an exploded view of a local structure of an embodiment of the present invention;

[0016] Figure 3 It is a schematic diagram of the distribution of two sets of stator coil windings in a double-winding stator assembly;

[0017] Figure 4 A schematic diagram of the pipe connection between the oil tank and the steering gear according to the embodiment of the present invention;

[0018] Figure 5 This is a schematic diagram of the control principle structure of the dual low-voltage integrated controller.

[0019] Figure numerals: 1. Dual low-voltage integrated controller; 2. Rear cover; 3. Dual-winding stator assembly; 4. Front cover; 5. Hydraulic steering pump; 6. Oil inlet pipe; 7. High-pressure pipe; 8. Oil return pipe. DETAILED DESCRIPTION

[0020] like Figure 1-Figure 5As shown, a dual-winding low-voltage motor pump proposed in this embodiment includes a driving motor and a dual low-voltage integrated controller 1 and a hydraulic steering pump 5 respectively connected to both ends of the driving motor, and is powered by a 24V low-voltage battery. The driving motor includes a dual-winding stator assembly 3, a rotor assembly rotatably arranged inside the dual-winding stator assembly 3, and a rear cover 2 and a front cover 4 respectively connected to both ends of the dual-winding stator assembly 3. The rear cover 2 is connected to the dual low-voltage integrated controller 1, and the front cover 4 is connected to the hydraulic steering pump 5.

[0021] The dual low voltage integrated controller 1 includes two sub-controllers. Figure 3 As shown, the double-winding stator assembly 3 includes two sets of stator coil windings, which are coaxially distributed from the inside to the outside. Two sub-controllers are respectively connected to the two sets of stator coil windings.

[0022] The output power of the two sets of stator coil windings is the same when they are running at the same time. When the rotor assembly of the drive motor rotates and outputs, the two sets of stator coil windings of the dual-winding stator assembly 3 output together, control the same rotor assembly to rotate and run, and output full power. When one set of stator coil windings fails, the other set of stator coil windings drives the rotor assembly to run, the flow of the hydraulic steering pump 5 remains unchanged, the output power is halved, and the output pressure is halved. The dual low-voltage integrated controller 1 adopts a dual power input design. The two power plug-ins of the controller PCB board are designed on both sides, and the power input is exactly the same. One set of power components drives one set of stator coil windings to work, which can effectively split the system power current in half, solving the problem that electronic components cannot withstand the high-power and high-current solutions of current low-voltage system products.

[0023] The integration of the dual low-voltage integrated controller 1 and the drive motor can effectively shorten the length of the three-phase output wiring harness and reduce the external radiation of the product. The dual low-voltage integrated controller 1 has a power plug-in integrated in the upper front end, and adopts a high-current low-voltage aviation plug-in, which is convenient for the installation of the whole vehicle and improves the assembly efficiency. The lower front end of the dual low-voltage integrated controller 1 is provided with a fixed point for pairing with the plug harness. The above setting method can prevent premature failure of the product caused by shaking between the plug and the socket when the product is running. The three-phase output of the dual low-voltage integrated controller 1 adopts a quick jack socket design, which is convenient for the rapid assembly of the controller in batches.

[0024] The rear cover 2 is provided with double equipotential grounding holes to facilitate the design and installation of the vehicle system ground wire. The three-phase input ends of the two sets of stator coil windings are equipped with three-phase positioning injection molding positioning sleeves to position the three-phase terminals.

[0025] The input end of the hydraulic steering pump 5 is connected to the rotor assembly. The hydraulic steering pump 5 has an oil inlet and an oil outlet. The hydraulic steering pump 5 adopts a bass gear pump. The maximum working noise of the system can be guaranteed to be 65dB (A) at a distance of 150mm. The hydraulic steering pump 5 has high overall efficiency and high working speed. The hydraulic system efficiency can reach more than 85%. A sealed cavity design is adopted between the drive motor and the hydraulic steering pump 5 to effectively store grease. The rigid drive connection shaft between the rotor assembly and the hydraulic steering pump is lubricated with oil. A grease filling hole is set on the front cover 4 to facilitate the product to add grease without removing the pump head.

[0026] This embodiment has two sets of stator coil windings that can operate simultaneously or separately. When one set of stator coil windings fails, the other set of stator coil windings can remain in operation. The hydraulic steering pump 5 is effectively driven by driving the rotor assembly, and the hydraulic steering system is used to provide hydraulic steering assistance for the vehicle. Under the premise of ensuring that the steering hand force of the system remains unchanged, only the steering angle of the vehicle is reduced, the safety function level of the steering system is improved, and driving safety is guaranteed. The entire motor pump is integrated into an integrated design, and the whole machine has only one hydraulic steering pump 5, and one hydraulic steering pump 5 has an oil inlet and an oil outlet. On the basis of ensuring the functional safety level, the steering system design is simplified.

[0027] For the hydraulic steering system using the motor pump, the motor pump is installed horizontally, the oil pot is above the motor pump, and the oil pot outlet, oil inlet pipe 6, hydraulic steering pump 5 oil inlet, hydraulic steering pump 5 oil outlet, high-pressure pipe 7, steering gear, oil return pipe 8 and oil pot oil return port are connected in a closed loop. The motor pump with integrated design can still use another set of stator coil windings to drive the rotor assembly when one set of stator coils fails, thereby driving the hydraulic steering pump 5 through the rotor assembly, and using the hydraulic steering system to provide hydraulic steering assistance to ensure driving safety.

[0028] The operation strategy of this dual-winding low-voltage motor pump is as follows:

[0029] When CAN is normal:

[0030] 1. When the handbrake is pulled up and the gear is in neutral, the hydraulic steering pump 55 works at an idle speed of 1500r / min;

[0031] 2. After the rotation angle sensor changes, the speed is adjusted within the range of 1500-2500r / min according to the rotation speed;

[0032] 3. When the handbrake or neutral gear is changed, the hydraulic steering pump 5 works at an idle speed of 2000r / min;

[0033] 4. After the rotation angle sensor changes, the speed is adjusted within the range of 2000-3500r / min according to the rotation speed;

[0034] 5. After the rotation angle sensor loses connection, the product runs at a constant speed of 2500r / min;

[0035] 6. If one end of the two sets of stator coil windings is damaged, the other end will be immediately accelerated to 3000rpm;

[0036] 7. The power incoming current is limited to approximately 120A.

[0037] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A dual-winding low-voltage motor pump, characterized in that: The invention comprises a driving motor and a dual low-voltage integrated controller (1) and a hydraulic steering pump (5) respectively connected to both ends of the driving motor; the driving motor comprises a dual-winding stator assembly (3) and a rotor assembly rotatably arranged inside the dual-winding stator assembly (3); an input end of the hydraulic steering pump (5) is connected to the rotor assembly; the hydraulic steering pump (5) has an oil inlet and an oil outlet; the dual low-voltage integrated controller (1) comprises two sub-controllers; the dual-winding stator assembly (3) comprises two sets of stator coil windings; and the two sub-controllers are respectively connected to the two sets of stator coil windings.

2. A dual-winding low-voltage motor pump according to claim 1, characterized in that: The upper front end of the dual low-voltage integrated controller (1) is integrated with a power plug-in, and the lower front end is provided with a fixing point for matching with a plug harness.

3. A dual-winding low-voltage motor pump according to claim 1, characterized in that: The drive motor also includes a rear cover (2) and a front cover (4) respectively connected to the two ends of the dual-winding stator assembly (3); the rear cover (2) is connected to the dual low-voltage integrated controller (1); and the front cover (4) is connected to the hydraulic steering pump (5).

4. A dual-winding low-voltage motor pump according to claim 3, characterized in that: The rear cover (2) is provided with double equipotential grounding holes.

5. A dual-winding low-voltage motor pump according to claim 3, characterized in that: The three-phase input ends of the two sets of stator coil windings are equipped with three-phase positioning injection-molded positioning sleeves to position the three-phase terminals.

6. A dual-winding low-voltage motor pump according to claim 3, characterized in that: The rigid drive connection shaft between the rotor assembly and the hydraulic steering pump is lubricated with oil, and a grease filling hole is provided on the front cover (4).

7. A dual-winding low-voltage motor pump according to claim 1, characterized in that: The output power is the same when the two sets of stator coil windings run simultaneously.

8. A dual-winding low-voltage motor pump according to claim 7, characterized in that: When the rotor assembly of the driving motor rotates and outputs, the two sets of stator coil windings of the double-winding stator assembly (3) output together to control the same rotor assembly to rotate and operate, and output full power; when one set of stator coil windings fails, the other set of stator coil windings drives the rotor assembly to operate, the flow rate of the hydraulic steering pump (5) remains unchanged, the output power is halved, and the output pressure is halved.

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