Roots-type magnetorheological fluid medium high-pressure retarder and automobile

Abstract

The present invention provides a Roots-type magnetorheological fluid medium high-pressure retarder and a car, and relates to the technical field of retarders. The Roots-type magnetorheological fluid medium high-pressure retarder comprises a working housing, a Roots-type transmission assembly, and a magnetic field generating component capable of generating a magnetic field and adjusting the magnetic field strength; a working cavity for the movement of the Roots-type transmission assembly is arranged in the working housing, an oil inlet and an oil outlet connected to the working cavity are provided on the working housing, an oil inlet pipe is connected to the working housing at the oil inlet, and an oil outlet pipe is connected to the working housing at the oil outlet; the working cavity is filled with magnetorheological fluid working medium, and a magnetic field generating component is arranged in the oil inlet pipe and / or the oil outlet pipe. The car comprises a car body and a Roots-type magnetorheological fluid medium high-pressure retarder; the Roots-type magnetorheological fluid medium high-pressure retarder is arranged on the car body, and the Roots-type magnetorheological fluid medium high-pressure retarder is connected to the car drive shaft through a speed reduction and torque increase gear pair. The technical effect of fast retarder response and large braking force is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of retarders, and in particular to a Roots-type magnetorheological fluid medium high-pressure retarder and a vehicle. Background Art

[0002] According to different working principles, automobile retarders can be divided into typical structural forms such as engine retarder, hydraulic retarder, electric turbine retarder, motor retarder and aerodynamic retarder.

[0003] The retarding efficiency of the hydraulic retarder is higher than that of the engine retarder, and it can travel downhill at a relatively high speed. During operation, the control valve is operated to apply pressure to the oil pool, so that the working fluid is filled into the working chamber between the rotor and the stator. The kinetic energy of the vehicle is consumed by the friction of the working fluid and the impact on the stator and converted into heat energy, which increases the temperature of the working fluid, thereby converting mechanical energy into heat energy, and then dissipating the heat energy to achieve the deceleration of the vehicle. However, the low-speed braking force of the hydraulic retarder is insufficient and the reaction speed is slow.

[0004] Therefore, providing a Roots-type magnetorheological fluid medium high-pressure retarder and a vehicle with fast response and strong braking force has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a Roots-type magnetorheological fluid medium high-pressure retarder and a vehicle, so as to alleviate the technical problems of slow reaction and small braking force of the retarder in the prior art.

[0006] In a first aspect, an embodiment of the present invention provides a Roots-type magnetorheological fluid medium high-pressure retarder, comprising a working housing, a Roots-type transmission assembly, and a magnetic field generating member capable of generating a magnetic field and adjusting the magnetic field strength;

[0007] A working cavity for the movement of the Roots-type transmission assembly is arranged in the working housing, an oil inlet and an oil outlet communicating with the working cavity are opened on the working housing, an oil inlet pipe is connected to the oil inlet of the working housing, and an oil outlet pipe is connected to the oil outlet of the working housing;

[0008] The working cavity is filled with magnetorheological fluid working medium, and the magnetic field generating element is arranged in the oil inlet pipe and / or the oil outlet pipe.

[0009] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the magnetic field generating element is an electromagnetic coil;

[0010] The electromagnetic coil is arranged in the oil inlet pipe and / or the oil outlet pipe, and the electromagnetic coil can be connected to the vehicle-mounted controller.

[0011] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the magnetic field generating element includes an insulating porous plate and a coil;

[0012] The insulating porous plate is arranged in the oil inlet pipe and / or the oil outlet pipe, the coil is wound on the insulating porous plate, and the coil can be connected to the vehicle-mounted controller.

[0013] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the above-mentioned Roots-type transmission assembly includes a rotating shaft and a Roots rotor;

[0014] The Roots rotor is sleeved on the rotating shaft, and the rotating shaft is inserted in the working cavity.

[0015] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the Roots rotor comprises a power Roots rotor and an output Roots rotor that can mesh with each other;

[0016] The rotating shaft includes a power shaft and an output shaft;

[0017] The power Roots rotor is fixedly sleeved on the power shaft, and the output Roots rotor is fixedly sleeved on the output shaft.

[0018] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the working housing comprises an upper housing, a middle housing and a lower housing;

[0019] One side of the middle shell is connected to the upper shell to form the working chamber, and the other side of the middle shell is connected to the lower shell.

[0020] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a heat sink is provided on the lower shell.

[0021] In a second aspect, an embodiment of the present invention provides a vehicle, comprising a vehicle body and the Roots-type magnetorheological fluid medium high-pressure retarder;

[0022] The Roots-type magnetorheological fluid medium high-pressure retarder is arranged on the vehicle body, and the Roots-type magnetorheological fluid medium high-pressure retarder is connected to the vehicle transmission shaft through a speed reduction and torque increase gear pair.

[0023] In combination with the second aspect, an embodiment of the present invention provides a possible implementation of the second aspect, wherein the above-mentioned automobile further includes an auxiliary pump, and both the oil inlet pipe and the oil outlet pipe are connected to the auxiliary pump.

[0024] In combination with the second aspect, an embodiment of the present invention provides a possible implementation of the second aspect, wherein the above-mentioned automobile further includes a storage box for storing a magnetorheological fluid working medium;

[0025] The auxiliary pump is connected to the storage tank;

[0026] The oil inlet pipe and the oil outlet pipe are both connected to the storage tank.

[0027] Beneficial effects:

[0028] The present invention provides a Roots-type magnetorheological fluid medium high-pressure retarder, comprising a working housing, a Roots-type transmission component and a magnetic field generating component capable of generating a magnetic field and adjusting the magnetic field strength; a working cavity for the Roots-type transmission component to move is arranged in the working housing, an oil inlet and an oil outlet connected to the working cavity are arranged on the working housing, an oil inlet pipe is connected to the oil inlet of the working housing, and an oil outlet pipe is connected to the oil outlet of the working housing; the working cavity is filled with magnetorheological fluid working medium, and a magnetic field generating component is arranged in the oil inlet pipe and / or the oil outlet pipe.

[0029] Specifically, when braking is required, the magnetorheological fluid working medium can enter the working chamber through the oil inlet pipe, and be driven by the Roots transmission component to be discharged from the oil outlet. When braking, the magnetorheological fluid working medium flows in the pipeline until it encounters resistance and forms an obstacle, thereby realizing the braking function, and the magnetic field is generated by the magnetic field generating element, thereby changing the viscosity of the magnetorheological fluid working medium, thereby realizing the adjustment of the magnitude of the braking torque; when braking is not required, the magnetic field generating element is closed, and the high-pressure chamber of the working chamber is directly connected to the storage box by controlling the unloading valve, so that the magnetorheological fluid working medium no longer flows through the pipeline. Through such a setting, the magnetorheological fluid working medium is transported into the working chamber through the oil inlet pipe and the magnetic field generating element is turned on to quickly realize the braking function, so the response is fast and the braking force is strong.

[0030] The present invention provides a car, comprising a car body and a Roots-type magnetorheological fluid medium high-pressure retarder; the Roots-type magnetorheological fluid medium high-pressure retarder is arranged on the car body, and the Roots-type magnetorheological fluid medium high-pressure retarder is connected to the car drive shaft through a speed reduction and torque increase gear pair. Compared with the prior art, the car has the above advantages, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of a Roots-type magnetorheological fluid medium high-pressure retarder provided in an embodiment of the present invention;

[0033] Figure 2 A cross-sectional view of a Roots-type magnetorheological fluid medium high-pressure retarder provided by an embodiment of the present invention;

[0034] Figure 3 A flow chart of the use of a Roots-type magnetorheological fluid medium high-pressure retarder provided in an embodiment of the present invention.

[0035] icon:

[0036] 100-working housing; 101-oil inlet; 102-oil outlet; 103-working chamber; 110-upper housing; 120-middle housing; 130-lower housing;

[0037] 200-Roots transmission assembly; 210-power Roots rotor; 220-output Roots rotor; 230-power shaft; 240-output shaft;

[0038] 300-magnetic field generating parts;

[0039] 400-magnetorheological fluid working medium;

[0040] 500-Radiator;

[0041] 600- auxiliary pump;

[0042] 700 - Storage box;

[0043] 800-Unloading valve. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0049] See also Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a Roots-type magnetorheological fluid medium high-pressure retarder, including a working housing 100, a Roots-type transmission assembly 200 and a magnetic field generating element 300 capable of generating a magnetic field and adjusting the magnetic field strength; a working cavity 103 for the movement of the Roots-type transmission assembly 200 is provided in the working housing 100, an oil inlet 101 and an oil outlet 102 connected to the working cavity 103 are provided on the working housing 100, an oil inlet pipe is connected to the oil inlet 101 of the working housing 100, and an oil outlet pipe is connected to the oil outlet 102 of the working housing 100; the working cavity 103 is filled with a magnetorheological fluid working medium 400, and a magnetic field generating element 300 is provided in the oil inlet pipe and the oil outlet pipe.

[0050] When braking, the pressure in the working chamber 103 can reach 7 MPa, and can reach a maximum of 15-20 MPa, which is a high-pressure environment.

[0051] Specifically, when braking is required, the magnetorheological fluid working medium 400 can enter the working chamber 103 through the oil inlet pipe, and be driven by the Roots-type transmission assembly 200 to be discharged from the oil outlet 102. When braking, the magnetorheological fluid working medium 400 flows in the pipeline until it encounters resistance and forms an obstacle, thereby realizing the braking function, and the magnetic field is generated by the magnetic field generating element 300, thereby changing the viscosity of the magnetorheological fluid working medium 400, thereby realizing the adjustment of the magnitude of the braking torque; when braking is not required, the magnetic field generating element 300 is closed, and the high-pressure chamber of the working chamber 103 is directly connected to the storage box 700 by controlling the unloading valve 800, so that the magnetorheological fluid working medium 400 no longer flows through the pipeline. Through such a setting, the magnetorheological fluid working medium 400 is transported into the working chamber 103 through the oil inlet pipe and the magnetic field generating element 300 is turned on to quickly realize the braking function, so the response is fast and the braking force is strong.

[0052] Among them, the working cavity 103 is filled with magnetorheological fluid working medium 400, so that the roots-type transmission component 200 will drive the magnetorheological fluid working medium 400 to be discharged along the pipeline when rotating, thereby forming resistance; in addition, the roots-type transmission component 200 will drive the magnetorheological fluid working medium 400 in the high-pressure cavity of the working cavity 103 to be discharged from the oil outlet 102 when rotating, but the displacement of the oil outlet 102 is limited, so when the roots-type transmission component 200 is used, high pressure will be formed in the working cavity 103, and resistance will be formed during the flow of the magnetorheological fluid working medium 400, thereby achieving braking. In addition, the magnetic field generating element 300 can change the viscosity of the magnetorheological fluid working medium 400, thereby further increasing the resistance of the magnetorheological fluid working medium 400 to be discharged from the oil pipe connected to the oil outlet 102, that is, increasing the resistance of the magnetorheological fluid working medium 400 flowing through the oil circuit, thereby increasing the shear stress, thereby generating a large torque.

[0053] In addition, the magnetic field generating element 300 can be separately arranged in the oil inlet pipe.

[0054] In addition, the magnetic field generating element 300 can be separately disposed in the oil outlet pipe.

[0055] Furthermore, a magnetic field generating element 300 is disposed in both the oil inlet pipe and the oil outlet pipe.

[0056] It should be pointed out that the Roots-type magnetorheological fluid medium high-pressure retarder provided in this embodiment is not sensitive to medium impurities, so this structure does not require a filtering device, has low requirements for system cleanliness, and can use large-particle iron powder as raw material. Therefore, the magnetorheological fluid working medium 400 has a large viscosity gradient under the action of the magnetic field, and can increase the shear stress to a greater extent, thereby generating a large torque.

[0057] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the magnetic field generating element 300 adopts an electromagnetic coil; the electromagnetic coil is arranged in the oil inlet pipe and the oil outlet pipe, and the electromagnetic coil can be connected to the vehicle-mounted controller.

[0058] Specifically, the magnetic field generating element 300 may be an electromagnetic coil, and the energization of the electromagnetic coil and the intensity of the current flowing through the electromagnetic coil may be conveniently controlled by the vehicle-mounted controller.

[0059] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional scheme of this embodiment, the magnetic field generating element 300 includes an insulating porous plate and a coil; the insulating porous plate is arranged in the oil inlet pipe and / or the oil outlet pipe, the coil is wound on the insulating porous plate, and the coil can be connected to the vehicle-mounted controller.

[0060] Among them, by using an insulating porous plate to carry the coil, the structural strength of the magnetic field generating element 300 can be improved, and the magnetorheological fluid working medium 400 in the pipeline can pass through the porous plate smoothly.

[0061] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the Roots-type transmission assembly 200 includes a rotating shaft and a Roots rotor; the Roots rotor is sleeved on the rotating shaft, and the rotating shaft is inserted into the working cavity 103 .

[0062] The Roots rotor includes a power Roots rotor 210 and an output Roots rotor 220 that can mesh with each other; the rotating shaft includes a power shaft 230 and an output shaft 240; the power Roots rotor 210 is fixedly sleeved on the power shaft 230, and the output Roots rotor 220 is fixedly sleeved on the output shaft 240.

[0063] Specifically, the power shaft 230 can be connected to a power device such as a gearbox of the vehicle, so as to transmit power to the power Roots rotor 210, and then the power Roots rotor 210 is engaged with the output Roots rotor 220 in the working cavity 103, and then the power is transmitted to the output shaft 240 through the output Roots rotor 220, and then the power is transmitted to the wheels through the output shaft 240. During this process, when braking is required, the power Roots rotor 210 and the output Roots rotor 220 both need to cut the magnetorheological fluid working medium 400 when rotating, thereby achieving braking.

[0064] See also Figure 1 , Figure 2 and Figure 3As shown, in an optional solution of this embodiment, the working shell 100 includes an upper shell 110, a middle shell 120 and a lower shell 130; one side of the middle shell 120 is connected to the upper shell 110 to form a working chamber 103, and the other side of the middle shell 120 is connected to the lower shell 130.

[0065] Specifically, grooves are provided on the upper shell 110 and the lower shell 130 . After the upper shell 110 and the lower shell 130 are connected, the grooves on the upper shell 110 and the middle shell 120 are interconnected to form the working chamber 103 .

[0066] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, a heat sink 500 is provided on the lower housing 130 .

[0067] Specifically, a radiator 500 is disposed on the lower housing 130 , and the heat generated in the working cavity 103 can be quickly dissipated through the radiator 500 .

[0068] The radiator 500 may be a plate heat exchanger, which exchanges heat with the cooling water of the automobile engine.

[0069] In addition, an oil-water exchange structure with a large flow rate may be directly formed in the working housing 100 to directly exchange heat with the cooling water.

[0070] It should be noted that the Roots-type magnetorheological fluid medium high-pressure retarder provided in this embodiment can use a magnetorheological fluid with a large particle mass ratio, so a large retarding torque can be generated under the action of a magnetic field. In addition, air can be sucked in, so when no-load braking is not required, the oil inlet pipe of the working housing 100 can be closed, and then air can be introduced into the working housing 100, so that the no-load resistance is small. And when braking, the retarding torque can be increased by increasing the vacuum degree.

[0071] This embodiment provides a car, including a car body and a Roots-type magnetorheological fluid medium high-pressure retarder; the Roots-type magnetorheological fluid medium high-pressure retarder is arranged on the car body, and the Roots-type magnetorheological fluid medium high-pressure retarder is connected to the car drive shaft through a speed reduction and torque increase gear pair.

[0072] Specifically, the automobile provided in this embodiment has the advantages of the above-mentioned Roots-type magnetorheological fluid medium high-pressure retarder compared with the prior art, which will not be described in detail here.

[0073] In an optional solution of this embodiment, the automobile further includes an auxiliary pump 600 , and both the oil inlet pipe and the oil outlet pipe are connected to the auxiliary pump 600 .

[0074] The automobile further comprises a storage tank 700 for storing the magnetorheological fluid working medium 400 ; the auxiliary pump 600 is connected to the storage tank 700 ; and both the oil inlet pipe and the oil outlet pipe are connected to the storage tank 700 .

[0075] Specifically, the auxiliary pump 600 can deliver the magnetorheological fluid working medium in the storage box 700 to the working cavity 103 , and the auxiliary pump 600 can pump the magnetorheological fluid working medium 400 in the working cavity 103 out of the storage box 700 .

[0076] A relief valve 800 is also provided, through which the connection between the auxiliary pump 600 and both the oil inlet pipe and the oil outlet pipe can be controlled.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Roots-type magnetorheological fluid medium high-pressure retarder, characterized in that: It comprises: a working housing (100), a Roots-type transmission assembly (200), and a magnetic field generating element (300) capable of generating a magnetic field and adjusting the magnetic field strength; A working cavity (103) for the Roots-type transmission assembly (200) to move is arranged in the working housing (100); an oil inlet (101) and an oil outlet (102) in communication with the working cavity (103) are provided on the working housing (100); an oil inlet pipe is connected to the oil inlet (101) of the working housing (100); and an oil outlet pipe is connected to the oil outlet (102) of the working housing (100); The working cavity (103) is filled with a magnetorheological fluid working medium (400), and the magnetic field generating element (300) is arranged in the oil inlet pipe and / or the oil outlet pipe.

2. The Roots-type magnetorheological fluid medium high-pressure retarder according to claim 1, characterized in that: The magnetic field generating element (300) adopts an electromagnetic coil; The electromagnetic coil is arranged in the oil inlet pipe and / or the oil outlet pipe, and the electromagnetic coil can be connected to the vehicle-mounted controller.

3. The Roots-type magnetorheological fluid medium high-pressure retarder according to claim 1, characterized in that: The magnetic field generating element (300) comprises an insulating porous plate and a coil; The insulating porous plate is arranged in the oil inlet pipe and / or the oil outlet pipe, the coil is wound on the insulating porous plate, and the coil can be connected to the vehicle-mounted controller.

4. The Roots-type magnetorheological fluid medium high-pressure retarder according to claim 1, characterized in that: The Roots-type transmission assembly (200) comprises a rotating shaft and a Roots rotor; The Roots rotor is sleeved on the rotating shaft, and the rotating shaft is inserted into the working cavity (103).

5. The Roots-type magnetorheological fluid medium high-pressure retarder according to claim 4, characterized in that: The Roots rotor comprises a power Roots rotor (210) and an output Roots rotor (220) which are capable of meshing with each other; The rotating shaft comprises a power shaft (230) and an output shaft (240); The power Roots rotor (210) is fixedly sleeved on the power shaft (230), and the output Roots rotor (220) is fixedly sleeved on the output shaft (240).

6. The Roots-type magnetorheological fluid medium high-pressure retarder according to claim 1, characterized in that: The working housing (100) comprises an upper housing (110), a middle housing (120) and a lower housing (130); One side of the middle shell (120) is connected to the upper shell (110) to form the working chamber (103), and the other side of the middle shell (120) is connected to the lower shell (130).

7. The Roots-type magnetorheological fluid medium high-pressure retarder according to claim 6, characterized in that: A heat sink (500) is disposed on the lower housing (130).

8. A car, characterized in that: It comprises a vehicle body and a Roots-type magnetorheological fluid medium high-pressure retarder as claimed in any one of claims 1 to 7; The Roots-type magnetorheological fluid medium high-pressure retarder is arranged on the vehicle body, and the Roots-type magnetorheological fluid medium high-pressure retarder is connected to the vehicle transmission shaft through a speed reduction and torque increase gear pair.

9. The automobile according to claim 8, characterized in that: An auxiliary pump (600) is also included, and both the oil inlet pipe and the oil outlet pipe are connected to the auxiliary pump (600).

10. The automobile according to claim 9, characterized in that: It also includes a storage box (700) for storing the magnetorheological fluid working medium (400); The auxiliary pump (600) is connected to the storage tank (700); Both the oil inlet pipe and the oil outlet pipe are connected to the storage tank (700).

Images