Brushless fuel pump

Abstract

A brushless fuel pump comprises a machine shell, a pump assembly and an upper end cover are arranged at the two ends of the machine shell, riveting rings are integrally arranged at the two ends of the machine shell, the machine shell is fixedly connected with the pump assembly and the upper end cover through the riveting rings in a pressing riveting mode, the connecting mode is simple and reliable, the structural strength is high, and the sealing performance and integrity of a pump body in the high-pressure working environment can be effectively guaranteed; a brushless motor is arranged in an inner cavity of the machine shell and comprises a support, a rotor is arranged in the support in a rotating mode, a plurality of inner stator punching sheets with winding wires are arranged on the side wall of the inner side of the support, the outer side of the support is sleeved with outer stator punching sheets, and the outer stator punching sheets are arranged on the outer side of the outer stator punching sheets. A structure that an inner stator punching sheet and an outer stator punching sheet are combined is adopted, optimization of a magnetic field and improvement of motor torque and efficiency are facilitated, the pump assembly comprises a wheel shell, an impeller connected with a rotor is arranged in the wheel shell, an oil inlet is further formed in the wheel shell, and an oil outlet communicated with an inner cavity of the support is formed in the upper end cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fuel pump, in particular to a brushless fuel pump. BACKGROUND

[0002] The fuel pump is the core component of the automobile fuel supply system, and its function is to pump the fuel out of the fuel tank and deliver it to the engine with certain pressure and flow. The traditional DC brush fuel pump adopts brush and commutator for commutation, and has inherent defects such as brush wear, electric spark, loud noise, limited service life, etc. Especially in the high-temperature and high-pressure fuel environment, the reliability and durability are challenged. SUMMARY

[0003] The utility model discloses a brushless fuel pump which is stable in structure, good in sealing, excellent in heat dissipation and lubrication, and strong in reliability.

[0004] The utility model discloses a brushless fuel pump, including the casing, the both ends of casing are equipped with pump assembly, upper end cover, the both ends of casing are equipped with riveting ring integrally, the casing is connected with pump assembly, upper end cover through riveting ring riveting fixed connection, the inner chamber of casing is equipped with brushless motor, the brushless motor includes the support, the rotor is rotatably equipped with in the support, the inside wall of support is equipped with a plurality of pieces of inner stator lamination with winding, the outer stator lamination is equipped with on the outside of support, the pump assembly includes the wheel shell, the wheel shell is equipped with with the impeller that rotor is connected in, the wheel shell is equipped with still with the oil inlet on the upper end cover, is equipped with with the oil outlet that the inner chamber of support communicates with on the upper end cover.

[0005] Adopt the above-mentioned structure, through the riveting ring of the integral molding of the both ends of casing and pump assembly and upper end cover carry out riveting fixed connection, and the connection mode is simple and reliable, and the structural strength is high, can effectively guarantee the sealing property and integrality of pump body under the high pressure working environment, avoids the problems such as welding deformation or screw loosening, adopts the structure that inner stator lamination and outer stator lamination combine, helps to optimize the magnetic field, improves motor torque and efficiency.

[0006] As preferred, the inner wall of the support is provided with an oil passing groove between the adjacent two inner stator laminations in the axial direction, and the side end of the support facing the pump assembly is provided with an oil inlet groove communicated with the oil passing groove. By adopting the above structure, the oil passing groove is arranged in the axial direction on the inner wall of the support, and the oil inlet groove is arranged at the end, so that a part of the fuel can flow through the motor inside through these grooves from the wheel cavity, directly cooling and lubricating the heating components such as the rotor and the stator, significantly improving the working efficiency and long-term operation reliability of the motor, and prolonging the service life.

[0007] As preferred, the inner end face of the support is provided with a support ring for supporting the rotor, and the outer side of the support ring is provided with a plurality of support pieces.

[0008] As preferred, the inner stator punching pieces are 6, and the 6 inner stator punching pieces are uniformly distributed on the inner side wall of the support.

[0009] As preferred, the wheel shell is internally provided with a wheel cavity in communication with the inner cavity of the support and the oil inlet, the impeller is rotatably arranged in the wheel cavity, and the shaft end of the rotor penetrates through the wheel shell and is connected with the impeller.

[0010] As preferred, the impeller is uniformly provided with blades, and a bearing is arranged between the shaft end of the rotor and the wheel shell.

[0011] As preferred, the upper end cover is provided with an electric control assembly, the electric control assembly comprises a wire slot, the support is provided with a plurality of insertion pieces electrically connected with the winding of the inner stator punching piece, the insertion pieces penetrate through the upper end cover and extend into the wire slot, and the outer side wall of the wire slot is provided with a clamping block. With the above structure, the wire slot of the electric control assembly is integrated on the upper end cover, and the direct electrical connection through the insertion pieces extending from the support reduces the intermediate wires and contact points, reduces the contact resistance and failure rate, the clamping block on the outer side of the wire slot also helps to fix the wire harness, and the stability and vibration resistance of the electrical connection are improved.

[0012] As preferred, the support is provided with 3 insertion pieces.

[0013] As preferred, the oil outlet is provided with a one-way valve, and the upper end cover is further provided with a pressure relief port in communication with the inner cavity of the support. With the above structure, the one-way valve is arranged in the oil outlet of the upper end cover, which can effectively prevent the backflow of fuel and maintain the pipeline pressure, and the pressure relief port arranged at the same time can be used as a safety channel to prevent the system pressure from being too high, thereby improving the safety and stability of the fuel supply system.

[0014] The utility model discloses have structure stable, good sealing, excellent heat dissipation and lubrication effect, strong reliability and the like advantages. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the embodiment of the utility model;

[0016] Figure 2 It is a side view of the embodiment of the utility model;

[0017] Figure 3 It is a plan view of the embodiment of the utility model;

[0018] Figure 4 It is the utility modelFigure 3 AA section view;

[0019] Figure 5 This is a structural schematic diagram of the bracket of this utility model.

[0020] In the diagram: 1. Housing; 11. Riveting ring; 2. Pump assembly; 21. Wheel housing; 22. Impeller; 23. Oil inlet; 24. Wheel cavity; 25. Blade; 26. Bearing; 3. Upper end cover; 31. Oil outlet; 32. Check valve; 33. Pressure relief port; 4. Brushless motor; 41. Bracket; 42. Rotor; 43. Winding; 44. Inner stator lamination; 45. Outer stator lamination; 46. Oil passage groove; 47. Oil inlet groove; 48. Support ring; 49. Support plate; 5. Electrical control assembly; 51. Wire insertion groove; 52. Insert; 53. Locking block. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0022] Example: Figures 1 to 5 The brushless fuel pump shown includes a housing 1, with a pump assembly 2 and an upper cover 3 at both ends of the housing 1. Riveting rings 11 are integrally formed at both ends of the housing 1. The housing 1 is fixedly connected to the pump assembly 2 and the upper cover 3 by riveting the riveting rings 11. The connection method is simple and reliable, with high structural strength, which can effectively ensure the sealing and integrity of the pump body under high pressure working environment and avoid problems such as welding deformation or loose threads.

[0023] The inner cavity of the casing 1 is provided with a brushless motor 4, the brushless motor 4 comprises a support 41, a rotor 42 is rotatably arranged in the support 41, 6 inner stator sheets 44 with windings 43 are arranged on the inner side wall of the support 41, the 6 inner stator sheets 44 are uniformly distributed on the inner side wall of the support 41, an outer stator sheet 45 is sleeved on the outer side of the support 41, the structure of the combination of the inner stator sheet 44 and the outer stator sheet 45 helps to optimize the magnetic field and improve the motor torque and efficiency; the inner wall of the support 41 is provided with an oil passage 46 between the adjacent two inner stator sheets 44 along the axial direction, the side end of the support 41 towards the pump assembly 2 is provided with an oil inlet groove 47 communicated with the oil passage 46, the axial oil passage 46 is arranged on the inner wall of the support 41, and the oil inlet groove 47 is arranged at the end, so that a part of the fuel can flow through the motor inside from the wheel cavity 24 through these grooves, directly cooling and lubricating the heating components such as the rotor 42 and the stator, significantly improving the working efficiency and long-term operation reliability of the motor, prolonging the service life, the inner end face of the support 41 is provided with a support ring 48 for supporting the rotor 42, the outer side of the support ring 48 is provided with a plurality of support sheets 49, the design of the support ring 48 and the support sheet 49 enhances the stability of the rotor 42 support, reduces the running noise and wear.

[0024] The pump assembly 2 comprises a wheel shell 21, the wheel shell 21 is provided with an impeller 22 connected with the rotor 42, the wheel shell 21 is further provided with an oil inlet 23, the wheel shell 21 is provided with a wheel cavity 24 communicated with the inner cavity of the support 41 and the oil inlet 23, the impeller 22 is rotatably arranged in the wheel cavity 24, the shaft end of the rotor 42 penetrates through the wheel shell 21 and is connected with the impeller 22, the impeller 22 is uniformly provided with blades 25, and the shaft end of the rotor 42 and the wheel shell 21 are sleeved with a bearing 26.

[0025] The upper end cover 3 is provided with an electric control assembly 5, the support 41 is provided with three insertion sheets 52 electrically connected with the windings 43 of the inner stator sheets 44, the insertion sheets 52 penetrate through the upper end cover 3 and extend into the wire slot 51, and the wire slot 51 is integrated on the upper end cover 3 and is directly electrically connected through the insertion sheets 52 extending from the support 41, this direct connection reduces the intermediate wires and contacts, reduces the contact resistance and failure rate, and the clamping block 53 on the outer side of the wire slot 51 also helps to fix the wire harness, improves the stability and vibration resistance of the electrical connection.

[0026] The upper end cover 3 is provided with an oil outlet 31 communicated with the inner cavity of the bracket 41, the oil outlet 31 is provided with a one-way valve 32, and the upper end cover 3 is further provided with a pressure relief port 33 communicated with the inner cavity of the bracket 41; the one-way valve 32 arranged in the oil outlet 31 of the upper end cover 3 can effectively prevent fuel backflow and maintain pipeline pressure; the pressure relief port 33 arranged simultaneously can serve as a safety channel to prevent system pressure from being too high, thereby improving the safety and stability of the fuel supply system.

[0027] The above-mentioned embodiment is only a preferred scheme of the present application, and does not limit the present application in any form, and other variants and modifications can be made without departing from the technical scheme recited in the claims.

Claims

1. A brushless fuel pump comprising a casing (1) provided with a pump assembly (2) and an upper end cover (3) at both ends, characterized in that: Both ends of the shell (1) are integrally provided with riveting rings (11), the shell (1) is fixedly connected with the pump assembly (2) and the upper end cover (3) through the riveting rings (11), a brushless motor (4) is arranged in the inner cavity of the shell (1), the brushless motor (4) comprises a support (41), a rotor (42) is rotatably arranged in the support (41), a plurality of inner stator sheets (44) provided with windings (43) are arranged on the inner side wall of the support (41), an outer stator sheet (45) is arranged on the outer side of the support (41), the pump assembly (2) comprises a wheel shell (21), the wheel shell (21) is provided with an impeller (22) connected with the rotor (42), the wheel shell (21) is further provided with an oil inlet (23), and the upper end cover (3) is provided with an oil outlet (31) in communication with the inner cavity of the support (41).

2. The brushless fuel pump of claim 1, wherein: The inner wall of the support (41) is provided with an oil passing groove (46) between the adjacent two inner stator sheets (44) along the axial direction thereof, and the side end of the support (41) facing the pump assembly (2) is provided with an oil inlet groove (47) in communication with the oil passing groove (46).

3. The brushless fuel pump of claim 1, wherein: The inner end face of the support (41) is provided with a support ring (48) for supporting the rotor (42), and the outer side of the support ring (48) is provided with a plurality of support sheets (49).

4. The brushless fuel pump of claim 1, wherein: The inner stator sheet (44) is 6 pieces, and the 6 inner stator sheets (44) are uniformly distributed on the inner side wall of the support (41).

5. The brushless fuel pump of claim 1, wherein: The wheel shell (21) is provided with a wheel cavity (24) in communication with the inner cavity of the support (41) and the oil inlet (23), the impeller (22) is rotatably arranged in the wheel cavity (24), and the shaft end of the rotor (42) penetrates through the wheel shell (21) and is connected with the impeller (22).

6. The brushless fuel pump of claim 5, wherein: The impeller (22) is uniformly provided with blades (25), and a bearing (26) is arranged between the shaft end of the rotor (42) and the wheel shell (21).

7. The brushless fuel pump of claim 1, wherein: The upper end cover (3) is provided with an electric control assembly (5), the electric control assembly (5) comprises a wire slot (51), the support (41) is provided with a plurality of tabs (52) electrically connected with the windings (43) of the inner stator sheets (44), the tabs (52) extend into the wire slot (51) through the upper end cover (3), and the outer side wall of the wire slot (51) is provided with a clamping block (53).

8. The brushless fuel pump of claim 7, wherein: The support (41) is provided with 3 tabs (52).

9. The brushless fuel pump of claim 1, wherein: The oil outlet (31) is provided with a one-way valve (32), and the upper end cover (3) is further provided with a pressure relief port (33) in communication with the inner cavity of the support (41).

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