Electronic oil pump outer rotor suspension device and electronic oil pump

Abstract

An electronic oil pump outer rotor suspension device comprises an outer rotor rotation supporting assembly, and the outer rotor rotation supporting assembly comprises an outer rotor and a rotation supporting assembly. The outer rotor and the rotary supporting assembly are of an integrated structure or a split structure; the outer rotor is embedded and fixed on the inner surface of the rotary supporting assembly; the outer surface of the rotary supporting assembly is arranged in the oil pump. An electronic oil pump comprises a pump cover, a driving shaft, a pump body, a motor, a control unit and a bottom cover. A double-end-face oil inlet and double-end-face oil discharge structure is arranged; the pump cover driving shaft and the inner rotor are driven in a press-fitting mode or a flat-position mode or a spline mode.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the oil pump technical field of the suspension system of the hybrid car and the fuel car, specifically relates to an electronic oil pump outer rotor suspension device and electronic oil pump. BACKGROUND

[0002] Pure electric, hybrid car and fuel car suspension system, and the need to use oil pump of full active suspension system, oil pump contains the hydraulic structure of electronic oil pump and mechanical oil pump.

[0003] Electronic oil pump oil suction principle introduction:

[0004] Electronic oil pump receives the action instruction from host computer, enters control state after initialization, and rotates the inner rotor of oil pump through the drive shaft of motor. As shown in Figure 8 When the inner rotor of oil pump rotates clockwise around center O1, the outer rotor rotates in the same direction around rotor center O2. At this time, the inner rotor tooth line and the outer rotor tooth line form a sealed cavity, and with the rotation of the rotor, the sealed volume of the oil suction cavity formed between the two meshing points of the inner and outer rotor tooth lines gradually expands, forming a vacuum degree, and the oil pump sucks oil under the pressure of atmosphere; at the same time, the sealed volume of the oil discharge cavity formed between the two meshing points of the inner and outer rotor tooth lines gradually shrinks, and the oil is discharged from the oil cavity, and the tooth lines of the inner and outer rotors form the maximum space between the two meshing points Figure 8 Lower oil sealing point), the oil suction is completed, and the oil discharge starts;

[0005] When the rotor continues to rotate, the sealed volume of the oil discharge cavity formed between the two meshing points of the inner and outer rotor tooth lines gradually decreases, and the oil is extruded, so that the oil is discharged through another oil distribution window, i.e. oil discharge port, until the tooth of the inner rotor meshes with the two teeth of the outer rotor Figure 8 Upper oil sealing point), the oil discharge is completed; the inner rotor forms 5 times of oil suction and discharge with the outer rotor per revolution, and when the inner rotor continuously rotates, the oil suction and discharge process of gear pump is completed.

[0006] The hydraulic pump is used for quick response adjustment of the damper of the speed reducer in the intelligent suspension system, and the structure can effectively make the pump have high rotation speed, i.e. 2W rpm, and the conventional hydraulic pump has 2000-5000 rpm; in the case of high rotation speed, the pump is prone to heat and wear; in the case of low rotation speed, the pump is prone to leakage and has low volumetric efficiency in the case of low rotation speed.

[0007] The volumetric efficiency of the pump is equal to the actual flow of the pump divided by the theoretical flow of the pump; and the volumetric efficiency of the pump represents the ability of the pump to resist leakage, and the conventional one is 40-50%;

[0008] The existing state high-pressure electronic oil pump 5000 rpm speed, pressure 90 bar, power is expected to 4000w-5000w;

[0009] Chinese patent CN2023211688429 provides an oil pump dynamic sealing device, the upper and lower end faces of the outer rotor and the inner rotor are in contact with the sealing strip, the sealing strip is embedded in the groove provided in the corresponding position of the pump cover and / or the pump body; a sealing ring is provided between the inner rotor and the pump body;

[0010] Application publication CN116557288A provides a non-inductive electronic oil pump, including a hydraulic module, a motor module, a PCBA module, the PCBA module includes a PCBA cover plate and a control panel, the motor module includes an integrated injection molding motor rotor and an embedded motor stator; the PCBA cover plate is tightly closed on the pump body and is sealed, the control panel is in contact with the oil body in the pump body, and the embedded motor stator and the pump body are integrally injection molded;

[0011] Both of them adopt split outer rotor and inner rotor, and realize sealing through sealing ring and groove of end face part; the shaft direction is rubbed with the pump body; the end face is rubbed with the pump body and the pump cover;

[0012] Due to the new energy industry, intelligent driving, and unmanned driving, the comfort and function of the whole vehicle are required to improve the suspension system of the whole vehicle, overcome the above defects, improve the volumetric efficiency of the pump, and meet the working condition requirements of high speed and low torque. Practical new type content

[0013] The utility model aims at providing an electronic oil pump outer rotor suspension device, which comprises an outer rotor rotating support assembly, the outer rotor rotating support assembly comprises an outer rotor and a rotating support assembly; the outer rotor and the rotating support assembly are an integral structure or a split structure; the outer rotor is embedded and fixed to the inner surface of the rotating support assembly; and the outer surface of the rotating support assembly is arranged in the oil pump.

[0014] The technical scheme provided by the present application also has the following technical features:

[0015] Preferably, in an embodiment of the present application, the rotating support assembly comprises a rotating part and a rolling part, the rotating part comprises an inner rotating member and an outer rotating member; and the rolling part comprises a rolling body.

[0016] Preferably, in an embodiment of the present application, the rolling body is a ball bearing, and a retainer is arranged in a matched mode.

[0017] Preferably, in an embodiment of the present application, the rotating support assembly is used for adjusting the distance gap between the outer rotor and the pump body.

[0018] Preferably, in an embodiment of the present application, the rotating support assembly is used for adjusting the distance gap between the outer rotor and the pump cover.

[0019] Preferably, in an embodiment of the present application, the rotating support assembly is used to adjust the distance gap between the outer rotor and the pump body and the pump cover.

[0020] Preferably, in an embodiment of the present application, the outer rotor and the pump cover are not in contact.

[0021] Preferably, in an embodiment of the present application, the outer rotor and the pump body are not in contact.

[0022] Preferably, in an embodiment of the present application, no sealing element or / and sealing strip is arranged between the outer rotor and the pump cover; no sealing element or / and sealing strip is arranged between the outer rotor and the pump body.

[0023] Preferably, in an embodiment of the present application, the outer rotor is provided with an inner rotor, no sealing element or / and sealing strip is arranged between the inner rotor and the pump cover; no sealing element or / and sealing strip is arranged between the inner rotor and the pump body.

[0024] Preferably, in an embodiment of the present application, the oil film gap between the outer rotor and the pump cover is 0.02-0.05mm.

[0025] Preferably, in an embodiment of the present application, the oil film gap between the outer rotor and the pump body is 0.02-0.05mm.

[0026] An electronic oil pump is obtained by using the above-mentioned electronic oil pump outer rotor suspension device, comprising a pump cover, a drive shaft, a pump body, a motor, a control unit, and a bottom cover; a double-end-face oil inlet and a double-end-face oil outlet structure are arranged; the pump cover drive shaft and the inner rotor are in press-fitting drive or flat position drive or spline drive.

[0027] Preferably, in an embodiment of the present application, the outer rotor rotating support assembly is assembled in the pump body by using a press-fitting or hot sleeve process, which is used to accurately control the height distance of the outer rotor in the hydraulic cavity of the pump body, so that the outer rotor is suspended in the hydraulic cavity with an installation gap of 0-0.05mm.

[0028] Preferably, in an embodiment of the present application, the installation gap is 0.02mm.

[0029] The present application has the following beneficial effects:

[0030] 1. The present application provides an electronic oil pump, which can be driven by a very low mechanical loss, a higher mechanical efficiency, or a smaller torque, the hydraulic end gap of the pump can be controlled to a minimum value to improve the volumetric efficiency, thereby meeting the high speed and high mechanical efficiency requirements, the mechanical efficiency can be improved to 90%, and the working conditions of the suspension oil pump, high pressure, high volumetric efficiency, high speed, and fast response are better adapted.

[0031] 2, the overall pump power of the structure outer rotor of the application is about 2500W under the condition of approaching 0 friction, and is reduced by about 2000W (the power is reduced, the volume of the motor is reduced, the weight is reduced, and the weight reduction reaches 2000g, the energy consumption is reduced by about 40% in proportion; the starting response of the conventional high-pressure pump is 100ms-200ms at 0-7000rpm; 0-7000rpm can be completed in 20ms; the technical characteristics of excellent low energy consumption, high efficiency, and high speed are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a sectional view of an electronic oil pump of the utility model;

[0033] Figure 2 is an explosion view of an electronic oil pump of the utility model;

[0034] Figure 3 is a front view of an electronic oil pump of the utility model;

[0035] Figure 4 is a top view of an electronic oil pump of the utility model;

[0036] Figure 5 is a left view of an electronic oil pump of the utility model;

[0037] Figure 6 is a sectional view of an electronic oil pump of the utility model;

[0038] Figure 7 is a schematic view of oil inlet and oil discharge of an electronic oil pump of the utility model;

[0039] Figure 8 is a schematic view of oil suction principle of an electronic oil pump of the prior art;

[0040] In the drawing:

[0041] 1, pump cover

[0042] 2, drive shaft

[0043] 3, inner rotor

[0044] 4, outer rotor rotating support assembly

[0045] 41, outer rotor

[0046] 42, rotating support assembly

[0047] 5, pump body

[0048] 6, motor

[0049] 7, control unit

[0050] 8, bottom cover. DETAILED DESCRIPTION

[0051] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate the present application, and are not limiting to the present application.

[0052] In the description of the present application, it should be pointed out that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0055] As Figures 1-7 An outer rotor suspension device of an electronic oil pump, comprising an outer rotor rotating support assembly 4, the outer rotor rotating support assembly 4 comprising an outer rotor 41 and a rotating support assembly 42; the outer rotor 41 and the rotating support assembly 42 are an integral structure or a split structure; the outer rotor 41 is embedded and fixed on the inner surface of the rotating support assembly 42; the outer surface of the rotating support assembly 42 is arranged in the oil pump; through the outer rotor rotating support assembly 4, the friction is reduced, the controllable gap setting is realized, so as to reduce the friction force, and the process expectation is achieved, so that the good working condition is maintained.

[0056] Specifically, in an embodiment of the present application, the rotating support assembly 42 comprises a rotating part and a rolling part, the rotating part comprises an inner rotating part and an outer rotating part; the rolling part comprises a rolling body; the present embodiment can adopt a ball bearing.

[0057] Specifically, in an embodiment of the present application, the rolling body is a ball, and a retainer is arranged in a matched manner; the present embodiment can adopt a ball bearing.

[0058] Specifically, in one embodiment of the present application, the rotating support assembly 42 is used to adjust the distance gap between the outer rotor 41 and the pump body 5.

[0059] Specifically, in one embodiment of the present application, the rotating support assembly 42 is used to adjust the distance gap between the outer rotor 41 and the pump cover 1.

[0060] Specifically, in one embodiment of the present application, the rotating support assembly 42 is used to adjust the distance gap between the outer rotor 41 and the pump body 5, the pump cover 1.

[0061] Specifically, in one embodiment of the present application, the outer rotor 41 and the pump cover 1 do not contact, and the gap is provided with an oil film, thereby reducing the friction and achieving the process expectation, so as to maintain good working condition.

[0062] Specifically, in one embodiment of the present application, the outer rotor 41 and the pump body 5 do not contact, and the gap is provided with an oil film, thereby reducing the friction and achieving the process expectation, so as to maintain good working condition.

[0063] Specifically, in one embodiment of the present application, no sealing element or / and sealing strip is arranged between the outer rotor 41 and the pump cover 1; no sealing element or / and sealing strip is arranged between the outer rotor 41 and the pump body 5, without the need to use the sealing element, the sealing strip, the structure for supporting the outer rotor and reducing the friction is cancelled, and the cost and structural complexity are reduced.

[0064] Specifically, in one embodiment of the present application, the outer rotor 41 is provided with the inner rotor 3, no sealing element or / and sealing strip is arranged between the inner rotor 3 and the pump cover 1; no sealing element or / and sealing strip is arranged between the inner rotor 3 and the pump body 5, without the need to use the sealing element, the sealing strip, the structure for supporting the outer rotor and reducing the friction is cancelled, and the cost and structural complexity are reduced.

[0065] Specifically, in one embodiment of the present application, the oil film gap between the outer rotor 41 and the pump cover 1 is 0.02-0.05 mm, which realizes the technical requirement of high-speed working condition.

[0066] Specifically, in one embodiment of the present application, the oil film gap between the outer rotor 41 and the pump body 5 is 0.02-0.05 mm.

[0067] Specifically, in one embodiment of the present application, an electronic oil pump comprises a pump cover 1, a driving shaft 2, a pump body 5, a motor 6, a control unit 7, and a bottom cover 8; a double-end-face oil inlet and a double-end-face oil outlet structure are arranged; the pump cover 1, the driving shaft 2, and the inner rotor 3 are in press-fit driving or flat-bit driving or spline driving.

[0068] Specifically, in one embodiment of the present application, the outer rotor rotating support assembly 4 is assembled in the pump body using a press-fitting or shrink-fitting process to precisely control the height distance of the outer rotor in the hydraulic cavity of the pump body, so that the outer rotor is suspended in the hydraulic cavity with an installation gap of 0-0.05 mm, and the gap is provided with an oil film, thereby reducing the friction and achieving the process expectation to keep the outer rotor in good working condition.

[0069] Specifically, in one embodiment of the present application, the installation gap is 0.02 mm, and the most ideal installation and running condition is achieved.

[0070] The main part of the present application is the outer rotor ball structure, and the rotating support assembly of the outer rotor rotating support assembly adopts a bearing to form a ball bearing integrated with the outer rotor, which can be combined and separated. The yellow and purple red parts; the powder metallurgy material of the outer rotor ball part can be heat treated and surface hard anodized, or high carbon steel material can be used, and the structural strength is stable and resistant to pressure up to 200 bar.

[0071] The outer rotor integrated ball structure is assembled in the pump body, which can adopt a press-fitting or shrink-fitting process; the height distance of the outer rotor in the hydraulic cavity of the pump body can be precisely controlled, so that the outer rotor is suspended in the hydraulic cavity, and the minimum gap of about 0.02 mm is well controlled to ensure that there is an oil film gap on the upper and lower end faces, and the gap is not too large to cause a decrease in volumetric efficiency.

[0072] Due to the need for suspension and other high-pressure environments, the pressure is about 200 bar, and the speed requirement is 1-2 W, so even a small contact will cause an increase in torque. This structure can avoid this problem; it provides mechanical efficiency and volumetric efficiency, reduces the power consumption of the motor, and at the same time improves the instantaneous response speed, the starting torque is low, the response speed is fast, and the suspension oil pump has a particularly high demand for this, reaching 1 W in 200 ms.

[0073] At the same time, the structure of double-end face oil inlet and double-end face oil outlet further reduces the hydraulic friction work, provides efficiency, and reduces torque. For example, new energy vehicles, new energy suspension supports, and aircraft lubrication.

[0074] The present application controls the distance of the outer rotor through the bearing to ensure that the upper and lower end faces do not produce friction with the pump body and the pump cover, and the oil film gap is 0.02-0.05 mm, which greatly reduces the friction.

[0075] The bearing linkage does not require the entire surface of the outer rotor to be in contact with the aluminum alloy pump body, which reduces the friction torque and saves a lot of power consumption, especially in high-speed and high-pressure conditions.

[0076] The driving shaft part of the present application can be press-fitted with the inner rotor or driven by the flat bit or spline drive of the inner rotor.

[0077] The control unit of the application can be used in 48V, 400V and 800V platforms.

[0078] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. An electronic oil pump outer rotor suspension device, characterized by: The outer rotor rotating support assembly (4) comprises an outer rotor (41) and a rotating support assembly (42); the outer rotor (41) and the rotating support assembly (42) are in an integrated structure or a split structure; the outer rotor (41) is embedded and fixed to the inner surface of the rotating support assembly (42). The outer surface of the rotating support assembly (42) is arranged in the oil pump.

2. An outer rotor suspension for an electric oil pump as claimed in claim 1, characterized in that The rotating support assembly (42) comprises a rotating part and a rolling part; the rotating part comprises an inner rotating member and an outer rotating member; the rolling part comprises a rolling body; the rolling body is a ball, and a retainer is arranged in a matched mode.

3. An outer rotor suspension for an electric oil pump as defined in claim 1, characterized in that The rotating support assembly (42) is used for adjusting the distance gap between the outer rotor (41) and the pump body (5), and is used for adjusting the distance gap between the outer rotor (41) and the pump cover (1).

4. An outer rotor suspension for an electric oil pump as defined in claim 1, characterized in that The outer rotor (41) and the pump cover (1) are not in contact; the outer rotor (41) and the pump body (5) are not in contact.

5. An electronic oil pump outer rotor suspension device according to claim 1, wherein No sealing element or / and sealing strip is arranged between the outer rotor (41) and the pump cover (1); no sealing element or / and sealing strip is arranged between the outer rotor (41) and the pump body (5).

6. An electronic oil pump outer rotor suspension device according to claim 1, wherein The outer rotor (41) is arranged in a matched mode with the inner rotor (3); no sealing element or / and sealing strip is arranged between the inner rotor (3) and the pump cover (1); no sealing element or / and sealing strip is arranged between the inner rotor (3) and the pump body (5).

7. An electronic oil pump outer rotor suspension device as claimed in claim 1, characterized in that The oil film gap between the outer rotor (41) and the pump cover (1) is 0.02-0.05 mm; the oil film gap between the outer rotor (41) and the pump body (5) is 0.02-0.05 mm.

8. An electric oil pump using the outer rotor suspension device according to any one of claims 1 to 7, characterized by The pump cover (1), the driving shaft (2), the pump body (5), the motor (6), the control unit (7) and the bottom cover (8) are arranged in a matched mode; a double-end-face oil inlet and a double-end-face oil outlet structure is arranged; the pump cover (1), the driving shaft (2) and the inner rotor (3) are arranged in a press-fit driving mode, a flat-bit driving mode or a spline driving mode.

9. An electric oil pump as claimed in claim 8, characterized in that The outer rotor rotating support assembly (4) is assembled in the pump body, the installation gap is 0-0.05 mm, and the outer rotor (41) is suspended in the hydraulic cavity of the pump body.

10. An electric oil pump as claimed in claim 9, characterized in that The installation gap is 0.02 mm.

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