68results about "Fluid clutches" patented technology

This invention discloses a high-elasticity coupling for the transmission of the drying cylinder in a paper machine, relating to the field of paper machinery transmission technology. It solves the industry pain points of existing magnetorheological fluid couplings, which offer high precision but are difficult to maintain and have high manufacturing costs. The invention features a closed annular fluid cavity inside the coupling hub, a purely radial through-hole on the outer circumference, and a quick-connect coupling with a 90° tangential deflection flow channel. Two sets of modular self-excited oscillation units with different natural frequencies can be detachably connected via the quick-connect coupling, simultaneously canceling fundamental frequency mechanical vibration and second-harmonic Taylor vortex vibration. It also integrates an electromagnetic coil phase compensation and active enhancement system, and a magnetorheological fluid hydraulic lock bypass overload protection device. This invention improves maintenance efficiency by 200 times, reduces manufacturing costs by 60%, achieves vibration control accuracy below 0.005μm, and has an overload response time of <1ms, making it suitable for high-end paper equipment transmission systems.

To suppress wear without impairing assembling workability of a damming member.SOLUTION: A fan coupling 1 includes: a clutch disc 3 fixed to a drive shaft 2 to rotate integrally with the drive shaft; a clutch housing 4 to which the fan is fixed; a labyrinth passage 12 provided between an outer surface of the clutch housing 4 and an outer side surface of the clutch disc 3 facing each other; a supply passage 13 that supplies a working fluid from a torque transmission chamber 11 to the labyrinth passage 12; a return passage 14 that guides the working fluid discharged radially outward from the labyrinth passage 12 to a storage chamber 10; and a damming member 15 for guiding the working fluid discharged from the labyrinth passage 12 to the return passage 14. The clutch housing 4 is provided with a groove 44 in which the damming member 15 is incorporated, and a spacer 16 for filling an incorporation gap of the damming member 15 is inserted into the groove 44.SELECTED DRAWING: Figure 1

The invention relates to a magnetorheological brake (1) which has a stator (2), a rotor (3), which is rotatably arranged relative to the stator (2), a gap (4) between the rotor (3) and the stator (2), which gap is delimited by a stator surface (2.1) and a rotor surface (3.1), and a magnetorheological powder (5), which has powder particles and which is located in the gap (4) between the rotor (3) and the stator (2), wherein the powder particles of the powder (5) have first powder particles (5.1) and second powder particles (5.2), and the first powder particles (5.1) have a grain size which lies below a first grain size limit value, and the second powder particles (5.2) have a grain size which lies above a second grain size limit value, and the first grain size limit value and the second grain size limit value are matched to one another such that, in the case of a magnetic field (6) passing through the gap (4), at least one contact force arises at a contact point (7) between two powder particles, which contact force is lower than at least one contact force between a powder particle and the stator surface (2.1) or a contact force between a powder particle and the rotor surface (3.1). The invention further relates to the use of a magnetorheological brake (1) for an operating element, to a force feedback actuator (8), to a steering device (12), and to a method.

Clutch assemblies and associated methods are disclosed herein. In an example, a clutch assembly comprise a first terminal, a second terminal, a clutch body enclosing a torque transfer fluid, and one or more electropermanent magnets (EPMs), each configured to generate a respective EPM magnetic field. The clutch assembly is configured to transmit a torque between the first terminal and the second terminal with a torque capacity that is at least partially based on the EPM magnetic fields. In an example, a method of operating a clutch assembly comprises transitioning each of one or more EPMs to a fully depolarized state, a fully polarized state, or an intermediate polarization state. In an example, a method of operating a clutch assembly comprises controlling each of one or more EPMs of the clutch assembly to vary a total EPM magnetic flux generated by the one or more EPMs.

The utility model discloses a kind of signal ring electrically-controlled silicon oil clutches with magnetic conduction capacity, to solve the more assembly parts of existing silicon oil clutch, assembly process is complex, and larger failure risk. It can shorten the service life of silicon oil clutch, reduce user experience and increase the problem of product waste. Its technical scheme main point is: including main shaft, driving plate, shell, end cover, excitation coil and bearing, driving plate is fixedly connected with main shaft, shell is rotatably connected with driving plate by bearing, shell is connected with end cover by cover shell screw, excitation coil is connected on main shaft, signal ring is fixedly connected with shell, the cross section of signal ring is Z type. The utility model can keep the original cutting magnetic induction line to generate hall signal function by signal ring on shell participate in magnetic circuit transmission function, ensure that transmission magnetic force is invariable, reduce the component material, assembly is more simplified, reduce failure risk.

An apparatus for transmitting power from a power generating device to an electrical machine suitable to be installed onboard a motor vehicle is disclosed. The apparatus comprises a power take-off (PTO) device which comprises a gear wheel which is suitable to receive rotary power from the power generating device. The apparatus further comprises a power transmission which is suitable to receive rotary power from the gear wheel and to transfer at least part of the received rotary power to the electrical machine. The apparatus further comprises a decoupler that is interconnected between and transfers rotary power from the gear wheel in input to the power transmission, wherein the decoupler is at least partially fitted inside the gear wheel and reduces the torque amplitude transmitted in input to the power transmission relative to the torque amplitude received in input by the gear wheel from the power generating device.

The present invention relates to a braking system for a vehicle, preferably an electric drive vehicle, comprising a brake (5) for at least one vehicle wheel (13), which does not require an additional brake hydraulic device, and which is filled with a viscous fluid (9) that generates friction in the brake (5) to generate a braking force, and which is arranged in a sealed container (3).

Provided are: a magnetorheological fluid which has low viscosity when not excited, has good resistance when excited, and has improved lubricity; and a mechanical device. The magnetorheological fluid comprises magnetic particles and a dispersion medium, and the dispersion medium comprises base oil and double-terminal higher fatty acid ester modified silicone oil, and / or side-chain higher fatty acid ester modified silicone oil.

The invention relates to a device (100) comprising a magnetorheological transmission device (10) with two rotating parts (2, 3) which can be moved relative to each other. An annular gap (4) with a magnetorheological medium (5) is formed between the rotating parts (2, 3). A coil device (6) is used to generate a controllable magnetic field in the gap (4). The sensor device (70) is used for acquiring position information and has two sensor units (7), including an active exciter-receiver unit (17) and a passive target unit (27). In this case, one sensor unit (7) is arranged on one rotating part (2, 3) and the other sensor unit (7) is arranged on the other rotating part (2, 3). The gap (4) extends at least in some sections between the sensor units (7).

The application discloses a kind of clutch fan rotation speed abnormality monitoring method, device, equipment and medium.The clutch fan rotation speed abnormality monitoring method includes: obtaining the current operating state of the engine of vehicle, and according to the current operating state of the engine, determine the target fan rotation speed abnormality early warning condition of electric control silicon oil clutch;When the electric control silicon oil clutch fan meets the target fan rotation speed abnormality early warning condition, trigger target timer, and when target timer timing overflow, generate fan rotation speed abnormality early warning signal.The technical scheme of the embodiment of the application can discover fan rotation speed abnormality in time and prompt user, to avoid the closed-loop control failure of electric control silicon oil clutch fan, guarantee user driving safety.

The invention discloses a silicone oil fan clutch for controlling the inclination angle of cooling ribs based on fuzzy logic. The silicone oil fan clutch comprises a clutch shell, the cooling ribs, a track ring, a driven gear, a driving gear, a motor, a temperature sensor, a motor fixing plate, a driving shaft, a driving disc, a working cavity, a valve block and a positioning pin. The temperature sensor collects the temperature of silicone oil in the working cavity in real time, after collected temperature signals are processed through a fuzzy logic control algorithm, target inclination angle parameters and control instructions used for adjusting the heat dissipation ribs are output, and therefore the motor is driven to adjust the inclination angle change of the heat dissipation ribs relative to the clutch shell through the track ring gear transmission set. According to the real-time temperature of the silicone oil in the working cavity, self-adaptive dynamic regulation and control are carried out on the heat dissipation efficiency, and the device has the advantages of being high in applicability, stable and reliable in work, controllable in heat dissipation efficiency and the like.

A kit (30) for use with a drivetrain of a rotatable assembly includes a tapered bushing (32), a tapered adapter (34), and a bushing lock (36). The tapered bushing includes a flange (32-1), a sleeve portion (32-2), a central opening (32C), a keyway (32-3) located along the central opening, at least one fastener hole (32-1F), and a tapered mating surface (32F) facing outward. The tapered adapter includes a hub body (34-1) with an end face portion (34-1E), an interior cavity (34-2), a threaded shaft (34-3), at least one fastener hole (34-4B) extending substantially axially through the hub body, and a tapered mating surface (34M) facing inward. The fastener hole(s) of the tapered adapter and tapered bushing are configured to align. The bushing lock includes a bushing lock central opening (36-1) extending axially, a keyway (36-3) located along the bushing lock central opening, and a fastener hole (36-2) extending substantially radially.

The invention relates to an apparatus (100) comprising a magnetorheological transmission device (10) having two rotary components (2, 3) that are movable relative to one another. Formed between the rotary components (2, 3) is an encircling gap (4) with a magnetorheological medium (5). A coil device (6) is used to generate a controllable magnetic field in the gap (4). A sensor device (70) is used to sense position information and has two sensor units (7), comprising an active exciter-receiver unit (17) and a passive target unit (27). One sensor unit (7) is arranged on one rotary component (2, 3) and the other sensor unit (7) is arranged on the other rotary component (2, 3). The gap (4) extends at least partially between the sensor units (7).

The present application relates to a kind of hydraulic pump type clutches, including shell assembly, intermeshing driving gear and driven gear.The hydraulic fluid is sealed in shell assembly, driven gear is arranged on shell assembly and can rotate relative to shell assembly.Shell assembly, driving gear constitutes power input unit connected with engine and power output unit connected with gearbox.Shell assembly includes partition body, the inside of partition body contacts with driving gear and driven gear, forms inside seal cavity, and the outside of partition body forms outside seal cavity.Flow regulating assembly is arranged on partition body.The structure of the hydraulic pump type clutch of the present application is simple, the speed of coupling is fast, heating is less, operation is simple, and the degree of coupling is easily controlled.Combination or separation state of clutch can be controlled by controlling flow regulating assembly, when flow regulating assembly is not completely closed, engine and gearbox are separated or partially connected.When flow regulating assembly is completely closed, engine and gearbox are completely connected.

To provide a magnetic viscous fluid device that allows a state of magnetic viscous fluid inside the magnetic viscous fluid device to be checked from outside of the device body without disassembling the magnetic viscous fluid device.SOLUTION: A magnetic viscous fluid device 1 includes: first parts 10, 20; second parts 30, 40 rotatable relative to the first parts 10, 20; a magnetic viscous fluid 50 sealed inside a device body having the first parts 10, 20 and the second parts 30, 40 and interposed between the first parts 10, 20 and the second parts 30, 40; and magnetic field generation parts 30, 40, 60 for generating a magnetic field to be applied to the magnetic viscous fluid 50. A part of the device body is made of a transparent member 100 so that the magnetic viscous fluid 50 sealed inside the device body is visible from outside of the device body.SELECTED DRAWING: Figure 1

This invention discloses a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs. The clutch includes a clutch housing, heat dissipation ribs, a track ring, a driven gear, a driving gear, a motor, a temperature sensor, a motor mounting plate, a drive shaft, a drive disc, a working chamber, a valve plate, and a positioning pin. The temperature sensor collects the silicone oil temperature in the working chamber in real time. After processing the collected temperature signal through a fuzzy logic control algorithm, it outputs target tilt angle parameters and control commands for adjusting the heat dissipation ribs. This drives the motor to adjust the tilt angle of the heat dissipation ribs relative to the clutch housing through the track ring gear transmission group. This invention adaptively and dynamically regulates the heat dissipation efficiency based on the real-time temperature of the silicone oil in the working chamber, offering advantages such as strong applicability, stable and reliable operation, and controllable heat dissipation efficiency.

The application relates to a power transmission mechanism and mechanical equipment, which comprises a power input assembly, a first clutch, a second clutch and a power output assembly. The power input assembly simultaneously drives a first driving part of the first clutch and a second driving part of the second clutch to rotate in different directions. When the output in the same direction as the first driving part is needed, the first driving part is controlled to be engaged with a first driven part, the first driving part can transmit the rotating torque to the first driven part, and the rotating torque is transmitted to an executing assembly through cooperation of a first linkage part and a second linkage part of the power output assembly. Conversely, the second driving part is controlled to be engaged with a second driven part, and the rotating torque is transmitted to the executing assembly through the power output assembly. The power transmission mechanism only needs to control the first driven part to be engaged with the first driving part or the second driven part to be engaged with the second driving part when the rotating direction is switched, the response speed is fast, and the transmission efficiency is high.

The invention relates to a magnetorheological brake (1) comprising a stator (2), a rotor (3) rotatably arranged relative to the stator (2), a gap (4) between the rotor (3) and the stator (2) bounded by a stator surface (2.1) and a rotor surface (3.1), and a magnetorheological powder (5) comprising powder particles and located in the gap (4) between the rotor (3) and the stator (2), wherein the powder particles of the powder (5) comprise first powder particles (5.1) and second powder particles (5.2), and the first powder particles (5.1) have a particle size below a first particle size limit, and the second powder particles (5.2) have a particle size that is above a second particle size limit and the first particle size limit and the second particle size limit are coordinated such that, when a magnetic field (6) passes through the gap (4), at least one contact force is generated at a contact point (7) between two powder particles which is less than at least one contact force between a powder particle and the stator surface (2.1) or one contact force between a powder particle and the rotor surface (3.1). The invention further relates to the use of a magnetorheological brake (1) for a control element, a force feedback actuator (8), a steering device (12) and a method.

The invention discloses a double-layer rotary control type Halbach array permanent magnet excitation magnetorheological clutch which comprises a control shaft, a cup-shaped rotor, a main shaft and an inner and outer annular circulation channel composed of an outer sleeve, an inner sleeve and the cup-shaped rotor, the channel is filled with magnetorheological fluid, and Halbach permanent magnet arrays are arranged on the inner side and the outer side of the inner and outer annular circulation channel respectively. During working, the double-layer Halbach array forms a strong magnetic field in the channel, so that the viscosity of the magnetorheological fluid is increased, and the transmission torque is increased; the control shaft is driven by the motor to rotate the inner layer array, the magnetic field intensity and direction synthesized in the channel can be dynamically changed, and therefore torque stepless regulation and clutch state switching are achieved. Compared with a traditional electromagnetic excitation mode, by means of the efficient magnetism gathering characteristic of the Halbach array, heating of the excitation device can be remarkably reduced, temperature rise of the magnetorheological fluid is reduced, and the Halbach array excitation device is particularly suitable for the working condition needing long-time stable operation.

The invention discloses a pump type speed-adjustable fan clutch which comprises an output shaft, a working cavity arranged along the output shaft, an oil inlet cavity component and an intelligent control system.According to the clutch, stepless speed regulation is achieved by transmitting liquid torque in the working cavity and adjusting the liquid return amount through a flow control valve; the temperature / rotating speed sensor transmits a signal to the control unit, the control unit controls the electromagnetic valve and the thermosensitive control valve to work according to a PID calculation result, a temperature-rotating speed-flow closed loop is formed, the rotating speed of the fan is automatically matched with the heat dissipation requirement, and abrasion-free, stepless, closed-loop and multi-mode effects are achieved. The clutch is suitable for the scenes of automobile engine cooling systems, industrial equipment heat dissipation and the like.

A vehicle powertrain is provided that may have: at least one electric motor; a vehicle includes an electric motor, a gear assembly configured to couple at least one wheel of the vehicle to the electric motor for driving the at least one wheel by the electric motor, the gear assembly including a positive contact clutch for switching the gear assembly between at least a first gear ratio and a second gear ratio. The actuator controls switching of the positive contact clutch. A magnetorheological (MR) fluid clutch apparatus is located between the electric motor and the positive contact clutch, the magnetorheological fluid clutch apparatus configured to apply a variable amount of slip between a component of the positive contact clutch and the electric motor during switching the positive contact clutch to the coupled state.

A suspension system may have a suspension member operatively connected to a sprung mass and to an unsprung mass, the unsprung mass having an invariant resonance frequency relative to the sprung mass. A MR actuator unit(s) is configured to be positioned between the sprung mass and the unsprung mass, the at least one MR actuator unit including a torque source, and at least one MR clutch apparatus having an input operatively coupled to the torque source, and an output, the at least one MR clutch apparatus controllable to transmit a variable amount of torque between the input and the output. A mechanism between the output and one of the sprung mass and the unsprung mass, the mechanism configured to transmit a force from the output between the sprung mass and the unsprung mass. At least the output has at least one rotating component rotating to transmit the force between the sprung and the unsprung mass. The at least one rotating component has a cumulative inertia associated with a rotation around a rotational axis, the cumulative inertia contributing to a total inertance value of the suspension system. The total inertance value is in a range of 0.2 to 2.2 times a reference value of inertance to minimize an amplitude of transmissibility to the sprung mass at the invariant resonance frequency.

The invention provides a variable-stiffness variable-damping magneto-rheological transmission device and a working method.The variable-stiffness variable-damping magneto-rheological transmission device comprises a shell assembly, an inner cylinder body, an outer cylinder body and a magnetism isolating sleeve, the inner cylinder body is installed in the outer cylinder body, and the magnetism isolating sleeve is installed between the inner cylinder body and the outer cylinder body; the inner cylinder body, the magnetism isolating sleeve and the outer cylinder body are all installed in the shell assembly. By combining the working modes of the magneto-rheological damper and the magneto-rheological clutch, the damping force in the linear direction is controlled by electrifying the coil on the piston rod, and the force in the rotating direction is controlled by electrifying the double coils on the driven disc coil rack in the external cylinder body; therefore, independent or comprehensive control of variable damping and variable rigidity is met.

An electromagnetic coil assembly (U; U') for use with a viscous clutch can include a coil housing (44-2) made of a magnetic flux-conducting metallic material and having an annular cup shape, a winding (44-1) that forms multiple turns within the coil housing, a cutout (60) in the coil housing that interrupts the magnetic flux-conducting metallic material, and a Hall effect sensor (56) aligned with the cutout. Also disclosed is a viscous clutch assembly (30), and a method of making a viscous clutch assembly (30). Additionally, a viscous clutch electrical connection and anti-rotation assembly (C) is disclosed.

A system comprises one or more wearable devices including a first body interface adapted to be secured to a first bodily part. A second body interface is adapted to be secured to a second bodily part separated from the first bodily part by a physiological joint. One or more joints provide one or more degrees of freedom between the first body interface and the second body interface. A magnetorheological (MR) fluid actuator unit comprises one or more power sources. An MR fluid clutch apparatus receiving torque from the at least one power source, the at least one MR fluid clutch apparatus operable to generate a variable amount of torque transmission when subjected to a magnetic field. A transmission couples the MR fluid actuator unit to the wearable device for converting torque from the MR fluid actuator unit to relative movement of the body interfaces with respect to one another.

A torque transmission device 10 comprises: a wheel that rotates by receiving torque from a worm gear; a rotary member 18 provided to be rotatable relative to the wheel; and a viscous fluid interposed between the wheel and the rotary member. The wheel has a first rotating part. The rotary member 18 has: a connection part that is connected to an external part and transmits torque; and a second rotating part that forms a space for holding the viscous fluid together with the first rotating part. The viscous fluid generates a resistive force in response to a rotational motion of the first rotating part or the second rotating part, transmits the torque from the wheel to the rotary member 18, and causes the rotary member to rotate together with the wheel. When torque is input from the connection part side, the wheel is stopped by the worm gear and does not rotate. The second rotating part rotates relative to the first rotating part due to the torque input from the connection part side.

Provided are: a magnetic viscous fluid that has a low viscosity during non-excitation, has good drag during excitation, and also has improved lubricity; and a mechanical device. The present invention provides a magnetic viscous fluid containing magnetic particles and a dispersion medium, wherein the dispersion medium contains a base oil and a dual end-type higher fatty acid ester-modified silicone oil and / or a side chain-type higher fatty acid ester-modified silicone oil.

The present invention relates to a device (100), in particular a steering input device, comprising a movable operating element (11) and an actuator device (10) for precisely influencing the mobility of the operating element (11). The actuator device (10) comprises a magnetorheological brake device (1) and an electric motor (6). A calibration device (7) is provided for adjusting the brake torque of the brake device (1) and the torque of the motor (6) to each other within an automatic calibration routine. and is suitable and designed to place the brake device (1) in a defined test state, generate at least one test torque acting on the brake device (1) by means of the motor (6), and record at least one characteristic quantity characterizing the effect of the test torque on the mobility of the operating element (11).

A system includes sensors for monitoring pressure, flow, pump speed, temperature, and / or other signals at the output of a main hydraulic pump, and a processing system executes one or more methods for identification of hydraulic system events, from the signals, corresponding to state changes and performance of the system and / or its subcomponents. Event identification is performed with classification and / or other machine learning algorithms, with generation of novel training data sets. The sensor(s) can also be used to determine power consumption information about the system and / or its subcomponents. The system processes event-associated outputs for execution of actions for improving system performance, along with other downstream applications.