CN212643366U - Pump type magnetorheological fluid retarder - Google Patents
Pump type magnetorheological fluid retarder Download PDFInfo
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- CN212643366U CN212643366U CN202020195151.8U CN202020195151U CN212643366U CN 212643366 U CN212643366 U CN 212643366U CN 202020195151 U CN202020195151 U CN 202020195151U CN 212643366 U CN212643366 U CN 212643366U
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Abstract
The utility model discloses a pump type magnetorheological fluid retarder, a retarder shaft is connected with a pump torsion-resistant drive; the steel plate is arranged in the retarder body, and the retarder body is partitioned into a left high-low pressure area channel and a right working cavity; the magnetizable material silicon steel plate and the working magnetic coil are arranged on the side of the working cavity; the pump is arranged in a right working cavity which is separated from the retarder body and the steel plate; the working cavity and the high-low pressure area channel are filled with working medium magnetorheological fluid; the magnetorheological fluid valve is arranged in a left channel of a steel plate hole in a high-pressure area of the steel plate; in the working temperature range, the viscosity of the magnetorheological fluid is less influenced by the temperature under the action of the magnetic field, the magnetorheological fluid is proportional to the magnetic field intensity, the controllability is excellent, the maximum braking force is controllable and can be far greater than a common hydraulic retarder, the braking force is stable, the low rotating speed can also generate the same braking force, the required retarding braking force can be generated at any speed, the magnetorheological fluid is not only used for long slopes under mountain roads, but also can be widely used for the requirement of frequent deceleration of urban vehicles; the brake can be implemented by replacing the main brake, and the use frequency of the main brake can be greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of vehicle retarder, and relates to a pump type magnetorheological fluid retarder; it is especially suitable for various vehicles, such as cars, trucks, bus engineering vehicles, etc.
Background
Due to the fact that urban road intersections are multiple, bus stops are dense, passenger flow is large, and buses are frequently braked; the mountain roads are steep and have many sharp bends, and medium and large trucks and buses running on the mountain road section for a long time also need to be braked frequently.
Under the condition of long-time frequent work, the brake shoes are quickly worn, the service life of the brake friction plates is short, and the loss of braking force or great reduction of braking performance is caused by the heat fading of the brake, which also becomes the main cause of traffic accidents. Therefore, it is necessary to equip an auxiliary braking system.
The retarder is used as an auxiliary braking component of the vehicle, reduces the load of the braking system of the original vehicle by acting on the transmission system of the original vehicle, enables the vehicle to uniformly decelerate, improves the reliability of the braking system of the vehicle, prolongs the service life of the braking system, and can greatly reduce the use cost of the vehicle.
The common retarder includes an engine retarder, an exhaust brake, an eddy current retarder, a hydraulic retarder and a magneto-rheological disk retarder. Some low-speed braking force is very small, some low-speed braking force is very large in power consumption, some low-speed braking force is very large in weight, and some low-speed braking force is very small.
The common hydraulic retarder has a stator and a rotor, and needs to increase or decrease the medium and oil storage in a working cavity, so that the structure is complex.
The existing magnetorheological fluid brakes and retarders utilize the magnetorheological fluid to generate resistance by utilizing shearing force or extrusion force when the magnetorheological fluid is in a magnetic field with certain strength, and the resistance is generated by friction, so the generated braking force is limited; the area of a brake disc of the ordinary magnetorheological fluid retarder is small, and the efficiency of the non-circulation heat exchange of the magnetorheological fluid is low; the problems that the magnetorheological fluid cannot be used in a vehicle in batch due to the limitations of abrasion and moment on the size, higher performance requirements on the magnetorheological fluid, high cost, large size and the like exist.
Disclosure of Invention
The utility model discloses a pump type magnetorheological fluid retarder, which aims to solve the problem that the hydraulic retarder with a stator and a rotor in the prior art has a complex structure; the problems that the braking force generated by a magnetorheological fluid brake and a retarder in the prior art is limited, the moment is limited by the size and the like are solved.
The utility model comprises an input gear, a retarder shaft, a retarder body, a steel plate, an O-shaped ring seal, an end cover, a working magnetic coil, a silicon steel plate, a magnetorheological fluid valve and a pump; a stator is not required; the retarder shaft is in torsion-resistant driving connection with the pump; the steel plate is arranged in the retarder body, and the retarder body is partitioned into a left high-low pressure area channel F and a right working cavity E; a silicon steel plate made of magnetizable materials and a working magnetic coil are arranged on the side of the working cavity E; the pump is arranged in a right working cavity E which is separated from the retarder body and the steel plate; the working cavity E and the high-low pressure area channel F are filled with working medium magnetorheological fluid and are ensured to be free of air; the steel plates are provided with round holes respectively facing the high-pressure and low-pressure areas of the rotor; the magnetorheological fluid valve is arranged in a left channel F of a steel plate hole in a high-pressure area of the steel plate and is fixed on the steel plate; when the working magnetic coil is not electrified, the high-low pressure area channel F is directly communicated with the working cavity E and the high-pressure area and the low-pressure area of the pump, no pressure difference is generated, and braking cannot be performed; the working element of the pump rotates in the magnetorheological fluid with very low viscosity and is self-lubricated; when current is loaded on the magnet exciting coil, under the action of a magnetic field, the viscosity of the medium magnetorheological fluid in the working cavity E is rapidly improved, the magnetorheological fluid with high viscosity cannot pass through a magnetorheological fluid valve, a channel F in a high-low pressure area is closed, and high-low pressure difference is instantly generated in the high-low pressure area of the working cavity E to form braking resistance; and current is loaded on the working excitation coil according to the requirement to generate magnetic fields with different strengths, so that the viscosity of the magnetorheological fluid is adjusted and changed, the viscosity of the magnetorheological fluid in the working cavity E is controlled, different back pressures are generated, and different braking forces are generated.
According to an optimized scheme, the magnetorheological fluid valve comprises an excitation coil and a silicon steel plate; the magnet exciting coil core iron is of a hollow structure; the magnet exciting coil is arranged at a round hole of the steel plate facing the low-pressure area, the steel plate is provided with a plurality of small holes or high-strength steel nets in the range corresponding to the hollow holes of the magnet exciting coil core iron; a magnetorheological fluid valve for controlling the on-off of the channel F is formed; when the excitation coil is electrified, the high-viscosity magnetorheological fluid blocks the small holes to be incapable of flowing back due to the porous structure, and the channels of the high-pressure area and the low-pressure area are cut off, so that the high-pressure area and the low-pressure area generate pressure difference to generate braking force. When the braking force is small, the current of the magnet exciting coil can be adjusted at the same time, so that a small amount of magnetorheological fluid in a high-low pressure area passes through, and the braking resistance is reduced; when the brake is released, the current of the magnet exciting coil is zero; realizing no-load separation; reduce no-load loss and realize the lubrication of the rotor.
In another optimized scheme, the magnetorheological fluid valve comprises a one-way valve plate, a mandril, a sealing ring, a piston, an oil seal and a return spring; the oil seal, the body and the piston cylinder form a closed cavity, the right side of the piston is arranged at the ejector rod, one end of the return spring acts on the shell, and the other end of the return spring acts on the one-way valve sheet; the steel plate high-pressure port faces the oil outlet or the return port in the low-pressure area; when the magnetorheological fluid has the maximum viscosity, the one-way valve plate is in an open state; when compressed air or hydraulic oil is introduced, the piston is pushed to the left side, the valve plate is closed, the channel of the high-low pressure area of the rotor is closed, and braking force is generated.
When the pump is a rotor pump or a gear pump, the end cover is provided with a magnetizable material silicon steel plate installation cavity, and the working magnetic coil, the core iron and the silicon steel plate are integrally packaged and arranged in the installation cavity of the end cover; when the pump is a screw rotor pump; the rotor is directly matched with the shell; the working magnetic coil is arranged on the outer circle of the rotor and can also be arranged on the left side of the rotor; the rotor can adopt a set of inner rotor and outer rotor which are arranged in the body; the rotor or the gear can adopt a cascade series structure; when the axial size of the cascade connection is overlarge, the left end working cavity can be additionally provided with the excitation coil.
The spiral rotor pump can be a single-shaft type, or a double-shaft type, or a triple-shaft type, and when the spiral rotor pump is adopted, the magnet exciting coil and the magnet exciting coil are arranged on the excircle.
The utility model is arranged behind the gearbox and is arranged in parallel or in series with the output shaft of the gearbox, and the retarder shaft keeps rotating when the vehicle runs no matter in parallel or in series; when the retarder shaft and the input gear are arranged in parallel, the retarder shaft is connected with the input gear in a torsion-resistant manner; when the retarder shaft is arranged in series, the front end of the retarder shaft is connected with an output shaft of the gearbox through a flange, and the output is connected with a transmission shaft; the retarder shaft keeps rotating when the vehicle runs; the input and output ports of the working cavity E are respectively connected with the inlet and the outlet of the heat exchanger; the low-pressure port is an oil return port and is directly communicated with an oil outlet of the heat exchanger; the rotor, the shell and the heat exchanger form a closed cavity; when the heat exchanger works, no magnetic field exists in the heat exchanger; the magnetorheological fluid circularly flows at low viscosity in the heat exchanger for heat exchange, and heat is exchanged to the cooling fluid. The heat exchanger can be arranged behind the pump and also can be arranged outside the shell; a cooling water channel can be arranged on the shell simultaneously, so that the cooling effect is improved; the outlet of the heat exchanger is throttled by a small-opening or multi-opening steel plate; the inlet adopts large-caliber backflow; an oil filling screw plug is arranged on the upper side of the working cavity E of the retarder body; an oil drain plug screw is arranged on the lower side of the high-low pressure area channel F; without the medium being forced or removed from the working chamber E.
The working temperature of the utility model is generally between 40 ℃ below zero and 160 ℃; and the inlet and the outlet are respectively provided with an inlet temperature sensor and an outlet temperature sensor for measuring the temperature of the inlet and the outlet. The viscosity output and back pressure of the magnetorheological fluid can reach 3 to 4MPa at most, and can be higher as required; the low-pressure port is an oil return port and is directly communicated with an oil outlet of the heat exchanger; the pressure resistance of the heat exchanger is at least 4 MPa; the maximum braking torque of the magnetorheological fluid can reach 10000Nm, and the power consumption is small; the high-temperature and low-speed braking force in the use temperature range is far higher than that of other ordinary retarders, so that the braking force is less influenced by the speed and the temperature in the temperature range.
The utility model discloses can match various version heat exchangers and aluminum alloy material's drum heat exchanger.
The utility model has the advantages of: the viscosity of the magnetorheological fluid is less influenced by the temperature under the action of a magnetic field within the working temperature range, the magnetorheological fluid is proportional to the magnetic field intensity, the controllability is excellent, the maximum braking force is controllable and can be far larger than that of a common hydraulic retarder, the braking force is stable, the same braking force can be generated at low rotating speed, the required retarding braking force can be generated at any vehicle speed basically, the magnetorheological fluid is not only used for long slopes under mountain roads, but also can be widely used for the requirement of frequent deceleration of urban vehicles; even if the brake can be occasionally applied instead of the main brake according to the requirement, the use frequency of the main brake can be greatly reduced. Small size, light weight, low power consumption, high power, good heat dissipation and convenient arrangement. The rotor, the shell and the heat exchanger form a closed cavity, only an oil filling hole capable of exhausting is arranged, and an oil discharging hole for replacing media is arranged below the oil filling hole. Therefore, the consumption of the medium of the magnetorheological fluid is reduced, and the structure is greatly simplified; the consumption of the magnetorheological fluid is less, so that the cost is in a controllable range.
Drawings
Fig. 1 is a schematic structural view of an inner meshing cycloid rotor pump type magnetorheological fluid retarder according to a first embodiment of the utility model;
fig. 2 is a cross-sectional view of a first embodiment of the utility model a-a;
FIG. 3 is a cross-sectional view of a first embodiment of the utility model B-B;
fig. 4 is a schematic structural view of an inner meshing cycloid gerotor pump type magnetorheological fluid retarder with a channel F mechanically opened and closed according to a second embodiment of the utility model;
fig. 5 is a schematic structural view of an inner gearing involute or cycloid gear pump type magnetorheological fluid retarder with a magnet exciting coil arranged at a low-pressure return port of a steel plate according to a third embodiment of the utility model;
in the figure: the automatic retarder comprises an input gear 1, a retarder shaft 2, a retarder body 3, a front bearing 4, a rear bearing at the right end of the shaft 5, an outer oil seal 6, an outer oil seal 7, an inner oil seal 8, an inner oil seal 9, an inner rotor 10, an outer rotor 11, a steel plate 12, a right end cover 13, a working magnetic coil 14, an inlet temperature sensor 15, an outlet temperature sensor 16, a magnet exciting coil 17, a steel plate 18, a one-way valve plate 19-1, a push rod 19-2, a return spring 19-3, a seal ring 19-4, a piston 19-5, an oil seal 19-6, a silicon steel plate 20, an oil filling plug 21, an oil discharging plug 22, an exhaust one-way valve 23, a working cavity E and.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings.
The first embodiment of the utility model is an inner gearing cycloid rotor pump type magnetorheological fluid retarder; as shown in fig. 1, 2 and 3, the input gear is arranged in parallel and is connected with the retarder shaft in a torsion-proof manner through a spline; the retarder comprises an input gear 1, a retarder shaft 2, a retarder body 3, a front bearing 4, a rear bearing 5 at the right end of the shaft, an outer oil seal 6, an outer oil seal 7, an inner oil seal 8, an inner oil seal 9, a pump, a steel plate 12, a right end cover 13, a working magnetic coil 14, an inlet temperature sensor 15, an outlet temperature sensor 16, an excitation coil 17, steel plates 18 and 20, a silicon steel plate, a 21 oil filling plug screw, a 22 oil drain plug screw, a 23 exhaust check valve, an E working cavity and an F high-low pressure area channel; an inner rotor 10 and an eccentric outer rotor 11 are arranged in the body 3; the working magnetic coil 14 is arranged in the space containing cavity at the left side of the end cover 13 and the right side of the silicon steel sheet 20; the core iron of the working magnetic coil 14 and the silicon steel sheet 20 are integrally packaged, and the retarder body 3, the silicon steel sheet 20 of the steel plate 12 and the end cover 13 form a working cavity E at intervals; the left side of the steel plate 12 and the right end of the body 3 form a high-low pressure area channel F; the working cavity E and the high-low pressure area channel F are filled with magnetorheological fluid and are ensured to be free of air; the retarder takes magnetorheological fluid with adjustable viscosity as a working medium; the retarder shaft 2 is connected with an inner rotor of the retarder in a torsion-resistant manner and drives the inner rotor to rotate; the magnetorheological fluid valve structure is arranged on the high-low pressure area channel to control the on-off of the channel F; the working magnetic coil 14 can be axially arranged at the outer edge of the rotor and embedded in the retarder body 3; can also be arranged at two ends and is sealed on the end cover 13 or the left side of the body 3 through a steel plate; the right end of the core iron with an inner hole of the excitation coil 17 is fixed on the steel plate 12 and sealed at the end face, and the inner hole is communicated with the high-pressure area hole of the steel plate 12; the excitation steel plate 18 is fixed at the left end of the coil 17 and sealed at the end face, or the outer edge of the steel plate 18 is seated on the wall of the channel F to increase the stress capacity; the area of the steel plate 18 opposite to the inner hole of the coil core iron is not filled with one or more small holes and is directly communicated with the channel F; when the coil is not electrified, the high-low pressure area channel F is directly communicated with the working cavity E and the high-pressure area of the rotor through the steel plate 12, the inner hole of the core iron of the coil 17 and the plurality of small holes of the steel plate 18, no pressure difference is generated, braking cannot be performed, and the rotor rotates in the magnetorheological fluid with very low viscosity and is self-lubricated; when current is loaded on the magnet exciting coil 17, under the action of a magnetic field, the viscosity of medium magnetorheological fluid in the core iron of the coil 17 is rapidly improved, and the magnetorheological fluid with high viscosity cannot flow to the high-low pressure area channel F through the small holes of the steel plate 18 and flows back to the low pressure area of the working cavity E; the channel F of the high-low pressure area is closed, and the high-low pressure area of the working cavity E instantly generates high-low pressure difference to form braking resistance; the current is loaded on the working magnet exciting coil 14, so that the viscosity of the magnetorheological fluid is adjusted and changed, and different braking forces are generated; when the braking force is small, the current of the magnet exciting coil 17 can be adjusted at the same time, so that a small amount of magnetorheological fluid in a high-low pressure area passes through, and the braking resistance is reduced; when the brake is released, the current of the working magnet exciting coil 14 and the working magnet exciting coil 17 is zero, and the brake is released; the on-off of the high-pressure and low-pressure areas of the rotor is realized by the viscosity change principle of the magnetorheological fluid valve, namely, the gap between the rotor and the shell is enlarged, so that the pressure difference of the high-pressure and low-pressure areas cannot be established, no-load separation is realized, and no-load separation is realized; reduce no-load loss and realize the lubrication of the rotor.
The utility model discloses second embodiment is the inner gearing cycloid impeller pump formula magnetorheological suspensions retarber for adopting mechanical type mode break-make passageway F, as shown in figure 4: a high-pressure port of the steel plate 12 faces an oil outlet, and a one-way valve plate 19-1, an ejector rod 19-2 and a return spring 19-3 are arranged on the left side of the oil outlet; the lower part of the return spring 19-3 acts on the shell, and the upper part acts on the one-way valve plate 19-1, so that the one-way valve plate 19-1 can be bounced off when the magnetorheological fluid has the maximum viscosity; an oil seal 19-6 is arranged at the right side of the sealing ring 19-4 and the piston 19-5 at the ejector rod to form a closed cavity together with the piston cylinder of the body; when compressed air or hydraulic oil is supplied, the piston 19-5 is pushed to the left side, so that the valve plate is closed, a channel of a high-low pressure area of the rotor formed by the cavity B is closed, and braking force is generated.
The third embodiment of the utility model is an internal meshing involute gear or an internal meshing cycloid rotor pump type magnetorheological fluid retarder, which arranges a magnetorheological fluid valve of an on-off channel F at a low-pressure area return port of a steel plate 12; as shown in fig. 2, 3, 4, and 5: the excitation coil 17 is arranged on the left side of the round hole of the steel plate 12 facing the low-pressure area, fixed and sealed at the end face; the reflux hole porous structure can prevent the high-viscosity magnetorheological fluid from refluxing when the excitation coil is electrified, and cut off the channel of the high-pressure and low-pressure area, so that the high-pressure and low-pressure area generates pressure difference to generate braking force; the magnetorheological fluid valve structure can be arranged at any position in the middle of the high-pressure and low-pressure area channel as long as the magnetorheological fluid valve structure can be used for switching the high-pressure and low-pressure area channel.
The utility model discloses be not limited to the structure of exemplifying of embodiment, the retarber not only can adopt the inner gearing rotor can also be the outer gearing rotor, a axle screw pump formula rotor, two spiral rotor magnetorheological suspensions retarber, three-axis spiral rotor magnetorheological suspensions retarber etc. all fall into the protection scope of the utility model.
Claims (6)
1. A pump type magnetorheological fluid retarder is characterized in that: the magnetic retarder comprises a retarder shaft, a retarder body, a steel plate, an O-shaped ring seal, an end cover, a working magnetic coil, a silicon steel plate, a magnetorheological fluid valve and a pump; a stator is not required; the retarder shaft is in torsion-resistant driving connection with the pump; the steel plate is arranged in the retarder body, and the retarder body is partitioned into a left high-low pressure area channel and a right working cavity; the magnetizable material silicon steel plate and the working magnetic coil are arranged on the side of the working cavity; the pump is arranged in a right working cavity which is separated from the retarder body and the steel plate; the working cavity and the high-low pressure area channel are filled with working medium magnetorheological fluid; the steel plates are provided with round holes respectively facing the high-pressure and low-pressure areas of the rotor; the magnetorheological fluid valve is arranged in a left channel of a steel plate hole in a high-pressure area of the steel plate.
2. The pump-type magnetorheological fluid retarder according to claim 1, wherein: the magnetorheological fluid valve comprises an excitation coil and a silicon steel plate; the magnet exciting coil core iron is of a hollow structure; the magnet exciting coil is arranged at a round hole of the steel plate facing the low-pressure area, the steel plate is provided with a plurality of small holes or high-strength steel nets in the range corresponding to the hollow holes of the magnet exciting coil core iron; forming a magnetorheological fluid valve for controlling the on-off of the channel.
3. The pump-type magnetorheological fluid retarder according to claim 1, wherein: the magnetorheological fluid valve comprises a one-way valve plate, an ejector rod, a sealing ring, a piston, an oil seal and a return spring; the oil seal, the body and the piston cylinder form a closed cavity, the right side of the piston is arranged at the ejector rod, one end of the return spring acts on the shell, and the other end of the return spring acts on the one-way valve sheet; the steel plate high pressure port faces the oil outlet or the return port in the low pressure area.
4. The pump-type magnetorheological fluid retarder according to claim 1, wherein: the screw rotor pump can be single-shaft, double-shaft or triple-shaft; when the spiral rotor pump is adopted, the magnet exciting coil and the magnet exciting coil are arranged on the excircle.
5. The pump-type magnetorheological fluid retarder according to claim 1, wherein: the gear box is arranged behind the gear box and is arranged in parallel or in series with an output shaft of the gear box; when the retarder shaft and the input gear are arranged in parallel, the retarder shaft is connected with the input gear in a torsion-resistant manner; the input gear is in meshing transmission with a gear of the gearbox; when the retarder shaft is arranged in series, the front end of the retarder shaft is connected with an output shaft of the gearbox through a flange, and the output is connected with a transmission shaft; the retarder shaft keeps rotating when the vehicle runs; the input and output ports of the working cavity are respectively connected with the inlet and the outlet of the heat exchanger; the low-pressure port is an oil return port and is directly communicated with an oil outlet of the heat exchanger; the rotor, the shell and the heat exchanger form a closed cavity.
6. The pump-type magnetorheological fluid retarder according to claim 5, wherein: the heat exchanger is arranged behind the pump or outside the shell; a cooling water channel is arranged on the shell; the outlet of the heat exchanger is throttled by a small-opening or multi-opening steel plate; the inlet adopts large-caliber backflow; an oil filling screw plug is arranged on the upper side of the working cavity of the retarder body; the lower side of the high-low pressure area channel is provided with an oil drain plug; without the need to press in or remove the medium from the working chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020195151.8U CN212643366U (en) | 2020-02-22 | 2020-02-22 | Pump type magnetorheological fluid retarder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020195151.8U CN212643366U (en) | 2020-02-22 | 2020-02-22 | Pump type magnetorheological fluid retarder |
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| CN212643366U true CN212643366U (en) | 2021-03-02 |
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| CN202020195151.8U Active CN212643366U (en) | 2020-02-22 | 2020-02-22 | Pump type magnetorheological fluid retarder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043186A (en) * | 2020-02-22 | 2020-04-21 | 富奥汽车零部件股份有限公司 | Pump type magnetorheological fluid retarder |
| CN114483829A (en) * | 2022-01-05 | 2022-05-13 | 富奥汽车零部件股份有限公司 | High-pressure cycloid rotor type high-viscosity oil medium retarder |
| CN114810869A (en) * | 2022-03-12 | 2022-07-29 | 富奥汽车零部件股份有限公司 | Oil storage cavity structure of hydrodynamic retarder |
| CN114922919A (en) * | 2022-02-09 | 2022-08-19 | 富奥汽车零部件股份有限公司 | Cycloidal rotor type magnetorheological fluid high-pressure retarder |
| CN114922920A (en) * | 2022-02-09 | 2022-08-19 | 富奥汽车零部件股份有限公司 | High-pressure cycloid rotor type magnetorheological fluid retarder electric control system and control method |
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2020
- 2020-02-22 CN CN202020195151.8U patent/CN212643366U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043186A (en) * | 2020-02-22 | 2020-04-21 | 富奥汽车零部件股份有限公司 | Pump type magnetorheological fluid retarder |
| CN114483829A (en) * | 2022-01-05 | 2022-05-13 | 富奥汽车零部件股份有限公司 | High-pressure cycloid rotor type high-viscosity oil medium retarder |
| CN114483829B (en) * | 2022-01-05 | 2023-07-04 | 富奥汽车零部件股份有限公司 | High-pressure cycloid rotor type high-viscosity oil medium retarder |
| CN114922919A (en) * | 2022-02-09 | 2022-08-19 | 富奥汽车零部件股份有限公司 | Cycloidal rotor type magnetorheological fluid high-pressure retarder |
| CN114922920A (en) * | 2022-02-09 | 2022-08-19 | 富奥汽车零部件股份有限公司 | High-pressure cycloid rotor type magnetorheological fluid retarder electric control system and control method |
| CN114922920B (en) * | 2022-02-09 | 2023-06-30 | 富奥汽车零部件股份有限公司 | High-pressure cycloid rotor type magnetorheological fluid retarder electric control system and control method |
| CN114922919B (en) * | 2022-02-09 | 2023-07-04 | 富奥汽车零部件股份有限公司 | Cycloid rotor type magnetorheological fluid high-pressure retarder |
| CN114810869A (en) * | 2022-03-12 | 2022-07-29 | 富奥汽车零部件股份有限公司 | Oil storage cavity structure of hydrodynamic retarder |
| CN114810869B (en) * | 2022-03-12 | 2023-06-30 | 富奥汽车零部件股份有限公司 | Hydraulic retarber oil storage chamber structure |
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