1573results about "Fluid gearings" patented technology

A power transmission device for a vehicle includes a housing that accommodates a power transmission mechanism, and a control valve configured to control a pressure of oil supplied to the power transmission mechanism. The power transmission mechanism includes an input shaft, an intermediate shaft, and an output shaft. The housing defines an insertion hole for a charging pipe. The output shaft is located farther toward a rear of a vehicle than the input shaft. The intermediate shaft is located above the output shaft. The control valve is arranged upright on a vehicle front side of the input shaft. The housing is provided with a recessed portion that is recessed inwardly in a region of the housing below the intermediate shaft and further toward the rear of the vehicle than the output shaft. The insertion hole is provided in a bottom section of the recessed portion when viewed from above.

A power transmission device includes a housing that accommodates a power transmission mechanism, a partition section that is provided in the housing and that supports the power transmission mechanism, a first oil path that is provided inside the partition section, a second oil path that is provided inside the partition section, a recess that is provided in the partition section, and a filter member that is disposed inside the recess. The recess is provided with an opening facing a direction of an axis of rotation of the power transmission device. The first oil path and the second oil path communicate via the recess.

Methods and systems for detecting a torque transmission failure in an aircraft power plant are provided. The system comprises a hydrostatic transmission for transmitting torque between a first shaft and a second shaft using hydraulic fluid, an a failure detector including a sensor configured to detect a pressure change in the hydraulic fluid. The failure detector is configured to generate an output indicative of the torque transmission failure in response to the pressure change having crossed a threshold.

A propulsion system for vehicle propulsion component having a variable displacement hydraulic pump, a hydraulic motor, adapted to drive the rotation of the propulsion component, an electric motor, adapted to drive the hydraulic pump, a source of electric power, and a controller configured, as a function of a setpoint value, to control the displacement of the hydraulic pump and the rotational speed of the electric motor so as to achieve the setpoint value while maintaining a rotational speed of the electric motor greater than a lower threshold value.

Systems, methods, and devices are provided for a turbine driven pump gearbox. A turbine engine may drive a primary shaft having gears. The gears may selectably engage with gears of a secondary shaft that drives a machine (e.g., pump). By changing which gears of the primary shaft engage with which gears of the secondary shaft, a gear ratio may be changed. A power takeoff device (e.g., a generator) may be connected to the primary shaft and may be operated in reverse as a motor to rotate, slow, stop, and / or reverse rotation of the primary shaft. Brakes may be associated with one or more of the primary and secondary shafts. The power takeoff device and one or more of the brakes may be controlled to shift engagement of the shafts between different positions, changing the gear ratio and / or disengaging the shafts from each other.

The invention discloses a compact-structure transmission which comprises a gearbox body, a torque converter is mounted on the outer side of the gearbox body, a turbine shaft of the torque converter is connected with a clutch shaft on the gearbox body, and the clutch shaft, a first idler shaft, a second idler shaft, a front axle gear shifting output shaft and a rear axle output shaft are arranged in the gearbox body; the clutch shaft is movably connected with a first gear and a second gear through bearings, a third gear and a fourth gear are fixed or formed on the first idler shaft, and a fifth gear, a sixth gear, a seventh gear and an eighth gear are fixed or formed on the second idler shaft. The front axle gear shifting output shaft is movably connected with a ninth gear, a tenth gear, an eleventh gear and a twelfth gear; a manual control mechanical gear shifting structure and a wet clutch control reversing structure are adopted, multi-gear advancing and retreating are achieved, the size is small, and occupied space is small.

The invention discloses a double-motor hydraulic mechanical stepless speed change transmission system and method, and relates to the technical field of stepless speed change transmission. The output end of an input shaft module is connected with the input end of a power output shaft module and the input end of a hydraulic pump shaft module, and a motor shaft driven gear is meshed with the output end of the input shaft module; the motor shaft driven gear is coaxially connected with the two hydraulic motors, the output end of the hydraulic pump shaft module is connected with the two hydraulic motors, the two hydraulic motors are connected with the input end of the motor shaft sun gear, and the motor shaft sun gear is meshed with the forward planet assembly and the backward planet assembly. The motor shaft driving gear is connected with the forward planet assembly and the backward planet assembly, the forward clutch is connected with the forward planet assembly, the backward clutch is connected with the backward planet assembly, the motor shaft driving gear is further meshed with the output shaft module, and the output end of the output shaft module is used for being connected with a front drive axle and a rear drive axle. The transmission efficiency, the control performance and the working efficiency can be improved.

The invention relates to the technical field of hydraulic mechanical transmission, in particular to a hydraulic torque converter assembly, a vehicle and a control method. The hydraulic torque converter assembly comprises a hydraulic torque converter, a pressure adjusting assembly and a rotating direction adjusting assembly, wherein the hydraulic torque converter is provided with an output shaft; the pressure adjusting assembly is connected to an oil inlet of the hydraulic torque converter and used for adjusting the pressure of the oil inlet of the hydraulic torque converter. The rotating direction adjusting assembly is connected with the output shaft and used for changing the rotating direction of the output shaft. When a vehicle goes down a long slope, the rotation direction of the output shaft is changed through the rotation direction adjusting assembly, the requirement for long-time retarding braking of the vehicle is met through the reverse rotation characteristic of the torque converter, compared with traditional reverse transmission braking, higher braking torque can be provided, and due to the fact that the pressure of an oil inlet of the hydraulic torque converter is adjustable, automatic adjustment can be conducted according to different braking torque requirements; and different slope requirements when the vehicle goes down a long slope working condition are met.

A first variable relief valve (51A) allows the flow of a hydraulic oil from a first main line (37A) to a second main line (37B) to be in a blocking state in a case the pressure of the first main line (37A) is a first pressure or less and to be in a communicating state in a case the pressure of the first main line (37A) exceeds the first pressure. A second variable relief valve (51B) allows the flow of a hydraulic oil from the second main line (37B) to the first main line (37A) to be in a blocking state in a case the pressure of the second main line (37B) is a second pressure or less and to be in a communicating state in a case the pressure of the second main line (37B) exceeds the second pressure. A “power transmission capability from a first hydraulic pump motor (36) to a second hydraulic pump motor (38)” and a “power transmission capability from the second hydraulic pump motor (38) to the first hydraulic pump motor (36)” are allowed to be different from each other by setting the first pressure of the first variable relief valve (51A) to be higher than the second pressure of the second variable relief valve (51B).

An automatic transmission (1) includes a transmission housing, a hydrodynamic torque converter (5), a first brake, a second brake, an intermediate plate (6) fixedly connected to the transmission housing and with ducts for supplying the hydrodynamic torque converter (5) and the two brakes (A, B) with oil. An oil guide shell (7) is arranged between the hydrodynamic torque converter (5) and the intermediate plate (6). Oil coming from the two brakes sinks via oil ducts (39.1, 39.2, 39.3) in the transmission housing and the intermediate plate (6) via the inflow opening (40) in the oil guide shell (7). The hydrodynamic torque converter (5), via rotation, conveys the oil to the elevated oil ejection opening in the oil guide shell (7), from where the oil sinks into the tank (8) via a gap (52) delimited by the oil guide shell (7) and the intermediate plate (6).

The hydraulic rock drill comprises a machine body composed of a machine tail part, a cylinder body part, a middle body part and a machine head part which are connected in sequence, and the machine tail part and the cylinder body part jointly form an impact assembly. The middle body part comprises a rotary assembly and a buffer assembly, and the machine head part comprises a washing assembly; the impact assembly and the buffer assembly jointly form a first cavity used for containing an impact piston. The rotary assembly and the flushing assembly jointly form a second cavity used for containing the bit shank, and the first cavity is communicated with the second cavity; the impact assembly introduces hydraulic oil into the first cavity, the impact piston can be pushed by the hydraulic oil to reciprocate along the central axis of the first cavity, and the head of the impact piston can penetrate out of the first cavity, enter the second cavity and impact the tail of the bit shank. The tail part of the bit shank is inserted into the rotary assembly and drives the bit shank to rotate along the central axis through the rotary assembly; a central hole extending towards the head of the bit shank is formed in a front-section rod body of the bit shank, and the flushing assembly injects flushing media into the central hole.

The invention provides an anti-impact characteristic heavy-load electric cylinder based on a hydraulic buffering mechanism and a control method thereof, and relates to the technical field of power driving systems. Comprising a motor, a controller and a speed reducing mechanism, and an output shaft of the speed reducing mechanism is connected with a lead screw; a piston, a piston rod and a lead screw nut connected to the lead screw are arranged in the cylinder barrel, the lead screw nut is connected with the piston, and the piston is connected with the piston rod. The interior of the piston rod is hollow so as to form a movable cavity for the lead screw to move; the piston is suitable for dividing the interior of the cylinder barrel into a rod cavity and a rodless cavity which are isolated from each other, and an oil through hole for communicating the rodless cavity with the movable cavity is formed in the piston; the hydraulic system is provided with a first oil way communicated to the rodless cavity and a second oil way connected to the rod cavity; the first oil way and the second oil way are connected to an oil supply system through a reversing valve. According to the scheme, the heavy load bearing capacity of the electric cylinder is improved.

To allow operation of a wind power generation device even at a low wind speed.SOLUTION: A low wind speed starting device 300 for a wind power generation device is provided in a power transmission system from a wind turbine 100 to a power generator 600. The power transmission system comprises the wind turbine 100, a speed increaser 500, the power generator 600, and power transmission shafts PS1, PS2, and PS3 connecting them. The low wind speed starting device 300 for the wind power generation device is a torque converter 300. The torque converter 300 comprises a direct connection mechanism. An input shaft of the torque converter 300 is connected to a main shaft PS1 that is a power transmission shaft from the wind turbine 100. An output shaft of the torque converter 300 is connected to an input shaft PS2 of the speed increaser 500. Thereby, torque of rotation output from the wind turbine 100 is amplified and transmitted to the power transmission system.SELECTED DRAWING: Figure 4

The invention provides a motor air suction prevention method and device and a hydrostatic driving vehicle, a hydrostatic driving system comprises a pump and a motor, the hydrostatic driving system is used for transmitting power between an engine and driving wheels, and the method comprises the steps that in response to operation of stepping on a brake pedal, the angle change rate of the brake pedal is obtained, and the angle change rate of the brake pedal is obtained; the angle change rate is the ratio of the rotation angle of the brake pedal to the rotation duration of the brake pedal; and under the condition that the angle change rate is larger than or equal to the preset threshold value, the displacement of the pump is controlled to be 0, the motor is controlled to increase the displacement according to the preset rate until the maximum displacement of the motor is achieved, and the problem that in the prior art, the cost is high when an oil supplementing pipeline is used for preventing air suction of the motor is solved.

A hydraulic fracturing system includes a hybrid electric transmission assembly to transfer power from an internal combustion engine to a hydraulic fracturing pump. The transmission assembly includes a first driveshaft coupled to the engine and a second driveshaft coupled to the pump with a primary drivetrain gear assembly coupling the first driveshaft to the second driveshaft. An electric drive gearset is disposed between the primary drivetrain gear assembly and the pump. An electric motor is couplable to the electric drive gearset, thereby allowing power to be passed from the electric motor to drive the pump and bypass the primary drivetrain gear assembly during the gear change. The system may include a plurality of electric motors each having an electric motor axis and an output gearset coupled to the electric drive gearset, where each of the electric motor axii are spaced radially outward from the first and second driveshafts.

The present disclosure relates to a method for operating a hydraulic system (10) of a power-split transmission (106) of a working machine (100) with a switching device (14) for switching between different driving ranges. The hydraulic system (10) has a first pump device (20) for supplying a hydraulic fluid at a first lower pressure level in a first pressure section (32) for lubricating the power-split transmission (106). Additionally, the hydraulic system (10) has a second pump device (22) for supplying the hydraulic fluid at a second higher pressure level in a second pressure section (34) for actuating the switching device (14). The hydraulic system (10) further has a cooling device (30, 48) for cooling the hydraulic fluid. The method includes sensing (1) the temperature of the hydraulic fluid.The method further includes controlling (IV) the cooling device (30, 48) to cool the hydraulic fluid of the hydraulic system (10) based on the detected temperature.

A magnetorheological (MR) actuator device comprising two or more MR actuator units. Each of the MR actuator units may include a motor, an MR fluid clutch apparatus operatively coupled to the motor to receive torque from the motor, the MR fluid clutch apparatus operable to generate a variable amount of torque transmission when subjected to a magnetic field. An output member is provided, a transmission operatively coupling the at least two MR actuator units to the output member, for the output member to receive torque from the MR actuator units. A controller for controlling the two or more MR actuator units to drive the output member, the controller driving the output member in at least an antagonistic mode in which the MR actuator units transmit torque in opposite directions to the output member. A collaborative mode may be provided to combined the torque of the two or more MR actuator units in a common direction on the output member.

The utility model provides a transfer case, range extender assembly and engineering machinery, transfer case is applicable to the engineering machinery, the engineering machinery comprises an engine, a generator and a hydraulic pump, transfer case includes: transfer case, transfer case includes casing and is located the planetary gear subassembly in the casing, planetary gear subassembly includes planet carrier, sun gear and a plurality of planet gear, the multiple planet gears are arranged around the outer circumferential face of the sun gear at intervals, and all the planet gears are installed on the planet carrier and engaged with the sun gear. Wherein the planet carrier is connected with an output shaft of the engine, and the sun gear is in transmission connection with an input shaft of the generator, so that the problem that in the prior art, an engine of a range extender structure for engineering machinery cannot work in the optimal efficiency interval all the time is solved.

The invention relates to a continuously variable transmission (CVT) comprising an input shaft, an output shaft, an intermediate shaft, a variator transmission, a hydrostatic transmission, a housing, and a bearing plate, wherein the hydrostatic transmission is arranged geometrically parallel to the variator transmission in a side view in the installed position, and the power flow between the hydrostatic transmission and the variator transmission is divisible, wherein the output shaft is offset horizontally and vertically to the input shaft in the axial direction, in the installed position, wherein the housing is one-piece and open on one side, and the components within the CVT are held in the housing by the bearing plate in the assembled state, wherein the housing and / or the bearing plate have flat surfaces on their outer sides designed to attach module components to an outer side of the CVT.

The invention discloses a novel cross-country forklift, which relates to the technical field of hydraulic hybrid power systems of engineering machinery and comprises the following modules: a power module for providing driving power of the whole forklift; the power division module is used for realizing double-flow power division and convergence and comprises an integrated mechanical gear speed change unit and a hydraulic stepless speed change unit; the mechanical transmission module is used for transmitting the power of the mechanical direct drive branch to the drive part; the hydraulic execution module is used for realizing a dynamic characteristic cooperative control technology and matching the flow of a hydraulic system with a mechanical gear speed ratio by establishing a speed-torque-pressure three-parameter coupling model; a composite speed change module; and a control and management module. By adopting double-flow power division and convergence, power division of 70% mechanical energy direct drive and 30% hydraulic energy speed regulation is achieved, and the traditional transmission efficiency bottleneck is effectively broken through. And under the rugged terrain and the variable-load working condition, the energy utilization rate can be increased, fuel consumption is reduced, and the whole machine has higher economical efficiency and durability.

The invention relates to the technical field of hydraulic oil cylinders, and discloses a gear swing oil cylinder and a using method and equipment thereof, and the gear swing oil cylinder comprises a gear shaft, a movable rack, a bidirectional hydraulic cylinder body and a connecting oil pipe; two groups of hydraulic cylinders are arranged in the bidirectional hydraulic cylinder body, a movable rack is connected between the two groups of hydraulic cylinders, and the movable rack is hydraulically driven to move; the hydraulic cylinders on different sides, which are in up-and-down meshed connection with the gear shaft, are subjected to bidirectional circulating telescopic pushing, so that more uniform and powerful driving force can be provided for the rack, and reciprocating rotation of the gear shaft is realized by such reciprocating circulation, so that other mechanical parts are driven to work through the gear shaft, and precise operation of high-precision torque transmission can be realized.

The utility model discloses a strip rotary tillage soil preparation machine capable of pressing through hydraulic driving, which relates to the technical field of strip tilling machines and comprises a rack, and first side plates are distributed on two sides of the rack; the gearbox is positioned on the rack; the hydraulic pump is connected to the output end of the through shaft; the hydraulic pump is in driving connection with the hydraulic motor; the hydraulic motor is in driving connection with the compacting structure; the first chain transmission part is connected to the output end of the half shaft; external power is input through the through shaft and is transmitted to drive the cutter shaft assembly to rotate through the gearbox and the first chain transmission part in sequence so as to realize soil crushing operation; external power is input through the through shaft and is transmitted to drive the compacting structure to move through the gearbox, the hydraulic pump and the hydraulic motor in sequence so as to realize soil compacting; the machine adopts hydraulic control to drive compacting, the side box to drive the cutter shaft to operate in two directions, and mechanical and hydraulic dual-drive to control row spacing, so that the defect that a hydraulic device of a tractor cannot work for a long time is overcome, a better configuration rotating speed is provided for the compacting device, the compacting effect is obvious, and the effect of preventing water evaporation is achieved.

The invention discloses a drilling machine power head speed change structure which comprises a shell, a top plate is arranged at the top of the shell, a first speed change device is arranged on one side in the shell, a second speed change device is arranged on the other side in the shell, a speed change bin is arranged above the second speed change device, a stabilizing bin is arranged below the second speed change device, and a partition plate is arranged between the speed change bin and the stabilizing bin. A hydraulic motor is arranged in the center of the rotating sleeve, a sleeve gear is arranged on the outer side of the middle of the rotating sleeve in a surrounding mode, and hydraulic sleeves are arranged at the upper end and the lower end of the rotating sleeve. The two-stage speed change structure has the beneficial effects that torque can be superposed or reduced through relative rotation, the torque change range is enlarged, meanwhile, speed change is more uniform and reliable through cooperation of the stepless speed change type structure and the hydraulic motor, meanwhile, stability of the output torque of the motor is guaranteed, and the service life of the motor is prolonged. The drilling machine has the advantages of a motor drilling machine and a hydraulic drilling machine.

The utility model belongs to the technical field of agricultural machinery transmission systems, and particularly relates to a front drive axle assembly of a hydraulic stepless speed change harvester, which comprises a gearbox body, a first shaft, a second shaft, a third shaft, a left half shaft and a right half shaft of a differential assembly are rotatably connected in the gearbox body, and the first shaft is in transmission connection with an output end of a hydraulic stepless speed change motor. The first shaft is sleeved with a first shaft gear A, the second shaft is sleeved with a first-stage speed reduction driven gear, the second shaft and the third shaft are in transmission fit through a gear position gear assembly, the third shaft is sleeved with a third shaft gear A, a left half shaft and a right half shaft of the differential mechanism assembly are in transmission connection with the tail end transmission box assembly, and one end of the third shaft extends out of the gearbox body to form a four-wheel drive reserved end. According to the utility model, a transmission mechanism which is driven by the hydraulic stepless variable-speed motor and is provided with multi-gear speed change is adopted, so that the requirements of simple operation and stable and reliable transmission are met, and a four-wheel-drive reserved end which can be in transmission fit with a four-wheel-drive transfer case is reserved, so that the complete machine can be ensured to have enough driving force.

Provided is a working vehicle operation control system that can suppress wear of a crawler. A working vehicle operation control system includes: a hydraulic pump that is driven by an engine; left and right hydraulic motors; and a hydraulic pump control unit that controls a pressurized oil discharge amount of the hydraulic pump after an engine starts, and controls a traveling operation of a working vehicle. The hydraulic pump control unit controls, in a case where one of a right-side crawler traveling speed and a left-side crawler traveling speed of the crawler is not more than a predetermined traveling reference speed and the other of the right-side crawler traveling speed and the left-side crawler traveling speed is not less than the predetermined traveling reference speed, the pressurized oil discharge amount of the hydraulic pump so as to decrease the other crawler traveling speed.

The invention discloses a high-power petroleum fracturing truck transmission system which comprises a torque converter and a gearbox which are integrated, and the gearbox is of a fixed shaft and planet structure. The torque converter comprises a shell a, a torque conversion mechanism is arranged in the shell a, and the torque conversion mechanism is connected with an input assembly; the gearbox comprises a shell b, the shell b is fixedly connected with the shell a, a parallel shaft transmission system in transmission connection with the output end of the torque conversion mechanism and a planet wheel transmission system in transmission connection with the output end of the parallel shaft transmission system are arranged in the shell b, and the output end of the planet wheel transmission system is connected with the output assembly; the gear of the parallel shaft transmission system is three, the gear of the planet wheel transmission system is three, and the gear of the parallel shaft transmission system is nine. The advantages of fixed shaft transmission and planetary transmission are combined, balance is carried out, the reliability is high, meanwhile, the weight can be reduced, and the transmitted torque can be improved. And the torque converter and the gearbox are integrally arranged, so that the overall size is reduced, and the mounting space is saved.

The invention relates to the technical field of plunger pumps, in particular to a variable flow plunger pump which comprises a driving unit, a plurality of variable pumps, a plurality of variable flow executing mechanisms and a transmission mechanism. The variable pumps are connected with the driving unit; the variable flow executing mechanisms are connected with the variable pump. The transmission mechanism comprises a plurality of driving transmission parts and a driven transmission part, the driving transmission parts are located on the outer side of the driven transmission part and connected with the driven transmission part, and the driving transmission parts are connected with the variable flow executing mechanism. According to the variable-flow plunger pump, the variable pump is driven by the driving unit to output variable-flow hydraulic oil, large-range real-time adjustment of flow can be achieved through cooperation of the variable pump and the variable-flow executing mechanism and variable-flow control, adjustment is accurate, and large-torque output of the variable-flow executing mechanism at different rotating speeds is guaranteed; the multiple driving transmission pieces drive one driven transmission piece to rotate, stress is uniform, the abrasion loss is reduced, and the structure is more compact.

The invention discloses a multistage energy storage wave energy hydraulic energy conversion system and a control method thereof, and belongs to the technical field of ocean hydraulic power generation, the system comprises an overhanging frame, a hydraulic cylinder is arranged on the side, away from a shore-based platform, of the overhanging frame, a floater is arranged below the hydraulic cylinder, and a hydraulic PTO system is arranged in the overhanging frame; the hydraulic PTO system comprises an oil tank, a one-way valve set, an energy accumulator set and a generator set, the hydraulic cylinder is connected with the oil tank through the one-way valve set, and the energy accumulator set and the generator set are both connected with the oil tank in series. By adopting the multistage energy storage wave energy hydraulic energy conversion system, the energy accumulators with different volumes are combined with the mechanical energy storage flywheel, so that the pressure pulsation of hydraulic oil in the system is reduced as much as possible, the hydraulic energy conversion efficiency of a wave energy power generation device is improved, more electric energy can be output, the wave energy is subjected to graded energy storage and multistage smooth liquid flow, and the power generation efficiency is improved. The safety and sustainability of the power generation system are improved, and the working efficiency of the hydraulic wave energy conversion system can be improved.

The invention relates to a multi-working-condition clutch control method for a power shifting tractor. The multi-working-condition clutch control method comprises the following specific steps that S1, basic parameters of a wet clutch of the tractor are calibrated; s2, the starting stage of the tractor is controlled; and S3, gear shifting in the advancing process of the tractor is controlled. The method has the beneficial effects that the current gear transmission ratio and the load size of the power shifting tractor are judged according to the parameters in the starting process of the power shifting tractor, the shifting process in the advancing process is compensated, and the curve control precision and comfort of the shifting clutch in the vehicle starting and advancing process can be improved.

A vehicle (1) includes a controllable clutch (30) having a variable clutch engagement ratio. A clutch (30) is arranged between a front axle drive output shaft (25) connected to a front axle (12) of a vehicle (1) and a rear axle drive output shaft (29) connected to a rear axle (14) of the vehicle. The control unit (5) may determine a speed difference (Vd) between the front axle drive output shaft (25) and the rear axle drive output shaft (29) and reduce the speed difference (V-d) if the speed difference (V-d) exceeds a threshold value. The threshold may depend on a traction of the vehicle (1) and a normalized rotational speed value of the rear axle drive output shaft (29).