96results about How to "Change displacement" patented technology

The invention discloses a deep-sea winch wave compensation hydraulic driving system with load adaptability. The deep-sea winch wave compensation hydraulic driving system with the load adaptability comprises a main lifting loop, a brake loop and a constant tension control loop. A three-position four-way solenoid valve is adopted in the main lifting loop to select a work overflow valve, switchover of system backpressure values under different working conditions is achieved, and system power consumption is lowered effectively. An overflow valve is adopted to control the backpressure of the constant tension control loop, the inlet of a fourth overflow valve is connected with a pilot operated check valve, the pilot operated check valve is controlled through a two-position three-way solenoid valve, effective separation of the constant tension control loop and the main lifting loop when the constant tension control loop does not work can be achieved, and meanwhile, the rapidity for the constant tension control loop to be put into work is guaranteed. The driving mode of a variable displacement motor and a variable pump set is adopted, the output torque of a variable hydraulic motor is changed by changing the travel of the variable displacement mechanism of the variable hydraulic motor, namely, by changing the displacement of the variable hydraulic motor, the output power of the variable pump set is changed correspondingly according to the hydraulic power needs of the variable hydraulic motor, and the stepless regulation of the output capacity of the hydraulic winch is achieved.

The invention relates to a parallel hydraulic hybrid driving system of a vehicle, which comprises a mechanical transmission system and a hydraulic regenerative brake system, wherein the mechanical transmission system comprises an engine, a gearbox, a hydraulic control clutch, a power coupler, a two-way variable pump/motor, a transmission shaft and a rear driving axle; and the hydraulic regenerative brake system comprises a two-way variable pump/motor, a first stop valve, an oil tank, a variable mechanism of the two-way variable pump/motor, a plugin valve, a high pressure accumulator, a high pressure accumulator pressure gauge, a pressure sensor, a reducing valve, a two-position two-way reversing valve, an overflow valve and a filter. A charging/discharging major loop of the driving system adopts a controllable plugin valve, the plugin valve is controlled by controlling a pilot valve of the driving system, and the driving system responses rapidly. The driving system is convenient to operate and high in reliability, the power source switching is smooth, the power performances of the vehicle are improved, and the driving system has significant effects in recovering energy of the vehicle and improving fuel economy. The driving system meets the intermittent and high-power requirements and is used for the heavy vehicle requiring frequent start and parking operations.

A coelacanth-like underwater robot disclosed by the present invention is characterized in that it includes a fish-like cavity and a control module, a caudal fin drive module, a pectoral fin auxiliary module, a buoyancy adjustment module and a center of gravity adjustment module respectively arranged in the cavity ; wherein: the caudal fin drive module, pectoral fin auxiliary module, buoyancy adjustment module and gravity adjustment module are respectively connected with the control module, respectively control the tail fin drive module to drive the tail to bend through the pressure sensor, attitude sensor and positioning sensor of the control module, and use the curved tail to be concave-convex The pressure difference between the two sides of the liquid creates pressure to propel the robot forward. Through the above structure, the coelacanth robot of the present invention can simulate fish swimming in water, can autonomously avoid obstacles, plan routes, and realize automatic ups and downs in different water areas, thereby realizing the intelligent swimming of the robot, and its motion characteristics are relatively Compared with traditional propeller propellers, it is more efficient, quieter and stealthier.

The invention discloses a direct evaporation type water-cooling fresh air unit. An air inlet regulation valve (2) is arranged at one end of a fresh air processing box body (1), an air filter (3) is arranged on the inner side of the air inlet regulation valve, and a fan (9) is arranged at the other end of the fresh air processing box body (1). Three refrigerating circuits capable of operating separately or simultaneously are arranged, and the first refrigerating circuit comprises an inverter compressor (10), a first plate heat exchanger (13), a first liquid storage tank (15), a first dry filter (18), a first thermal expansion valve (21) and a first evaporator (4) which are connected through a refrigerating fluid pipe. The second refrigerating circuit comprises a first constant-speed compressor (11), a second plate heat exchanger (14), a second liquid storage tank (16), a second dry filter (19), a second thermal expansion valve (22) and a second evaporator (5) which are connected through a refrigerating fluid pipe. The third refrigerating circuit comprises a third constant-speed compressor (12), a condensing coil (7), a third liquid storage tank (17), a third dry filter (20), a third thermal expansion valve (23) and a third evaporator (6) which are connected through a refrigerating fluid pipe. The direct evaporation type water-cooling fresh air unit can operate stably under wide meteorological conditions to meet a dehumidification requirement of an air conditioning system, improve comfort of supplied air and prevent moisture condensation at an air outlet.

The invention provides a piezoelectric micro-thruster comprising an air inlet (1), a housing (2), a power interface (3), a filter (4), a return spring (5), a valve core (6), a piezoelectric stack (7), a washer spring (8), a valve seat (9), a seal ring (10), an adjusting ring (11), a base (12) and a nozzle (13). In the case of power-off, the surface of the valve core (6) is tightly attached to the surface of the valve seat (9) and the surface of the adjusting ring (11), and the piezoelectric micro-thruster is off; in the case of power-on, the piezoelectric stack (7) deforms to drive the valve core (6) to move, the surface of the valve core (6) separates from the surface of the valve seat (9) and the surface of the adjusting ring (11), the piezoelectric micro-thruster is on and generates thrust. The sealing parts, such as the valve core (6), the valve seat (9) and the adjusting ring (11), are all made of metal, thus the piezoelectric micro-thruster is metal sealed. The piezoelectric micro-thruster is short in response time, continuously adjustable in thrust, low in power consumption and long service, meets the strict requirements of miniature satellites and missile precision guides for micro-thrust systems and is light in weight and small in size, and more weight and space are saved for the miniature satellites.

A capacity-varying rotary type compressor comprises a compression mechanism arranged in a casing. The compression mechanism comprises a cylinder. The cylinder is provided with a first sliding piece groove, a first sliding piece cavity, a second sliding piece groove and a second sliding piece cavity, wherein the first sliding piece groove and the first sliding piece cavity accommodate a first sliding piece, and the second sliding piece groove and the second sliding piece cavity accommodate a second sliding piece. A sliding piece spring is arranged in the first sliding piece cavity, an air suction hole in abutting connection with the first sliding piece is arranged on the cylinder, two opposite sliding side faces of the first sliding piece are provided with a first pressurizing cavity and a second pressurizing cavity, the first pressurizing cavity and the second pressurizing cavity are respectively communicated with a high-pressure pressure tapping hole and a low-pressure pressure tapping hole which are arranged on a four-way valve outside the casing, the second pressurizing cavity is communicated with the second sliding piece through a communicating passage, the pressure of the first pressurizing cavity and the pressure of the second pressurizing cavity are switched through the four-way valve so that stopping of the first sliding piece and stopping of the second sliding piece are alternately performed or removed. The capacity-varying rotary type compressor has the advantages that the energy utilizing rate is improved, the displacement of the compressor is changed, the refrigerating capacity is controlled easily, and the applied range is wide.

The invention discloses PVC gel driven flexible mechanical tongs and a preparing method thereof. A multi-layer PVC driver is arranged in a flexible outer frame. A flexible sensor is arranged on the top of the flexible outer frame. The multi-layer PVC driver is formed by stacking a plurality of single-layer PVC drivers, and object grabbing is achieved through the layer number of the single-layer PVC drivers and voltage applying. The PVC gel driven flexible mechanical tongs have the grabbing function and the sensing function at the same time, and on the basis of PVC gel driving, the drive form is simple.

The present invention discloses an optical fiber grating sensor for long-term real-time monitoring of the corrosion on steel bars. The optical fiber grating sensor comprises a protection shell, a fixation pipe buckle, an optical fiber grating, a conduction cantilever and a monitoring cantilever, wherein a protection shell is a bottomless rectangular box type structure, one side wall of the protection shell is provided with a round hole, the protection shell is fixedly connected to a steel bar through the fixation pipe buckle, the protection shell and the fixation pipe buckle form cementation connection after surface treatment, the protection shell is connected to the monitoring cantilever in a partially embedded manner, the fixation pipe buckle is connected to the conduction cantilever in a partially embedded manner, the monitoring cantilever forms pressing connection at the upper portion of the conduction cantilever, the optical fiber grating is arranged below the monitoring cantilever, and the tail fiber of the optical fiber grating passes through the upper portion of the conduction cantilever, penetrates through the round hole, and then is sleeved with an optical fiber loose sheath. According to the present invention, the optical fiber grating sensor can meet the long-term real-time monitoring of building members, and has advantages of convenient arrangement, simple structure, small size, high measurement precision, good stability, easy manufacture and processing, high sensitivity, anti-electromagnetic interference, adjustable measurement precision, good economic benefits, and good social benefits.

The invention discloses a two-direction energy dissipation beam falling prevention device, and belongs to the technical field of bridges. The two-direction energy dissipation beam falling prevention device comprises a main beam and a pier used for supporting the main beam. The main beam comprise a first main beam, a second main beam, a third main beam and a fourth main beam; the first main beam and the second main beam are arranged in parallel and are positioned on one side of the pier; the third main beam and the fourth main beam are arranged in parallel and are positioned on the other side of the pier; a sliding layer is arranged between the pier and the main beam, the lower end of the sliding layer is in transverse sliding matching and longitudinal sliding matching with the pier; and amulti-direction damping structure is arranged between the sliding layer and the pier. According to the present invention, with the application of the device in the bridge construction, the energy consumption can be effectively performed on the transverse direction and the longitudinal direction of the main beam during earthquake so as to avoid the occurrence of the beam falling.

A hydraulic control system includes an implement movable to perform an excavation cycle having a plurality of segments, a variable displacement motor configured to swing the implement at a desired speed during the excavation cycle, and a pump configured to pressurize fluid directed to drive the motor. The system further includes an accumulator configured to selectively receive fluid discharged from the motor via a charge valve, and to discharge fluid to the motor via a discharge valve. The system includes a selector valve fluidly connected to the charge valve and the discharge valve. The system also includes a controller configured to vary displacement of the motor, resulting in the desired speed.

The invention relates to an energy-saving water pump for an automobile engine. The energy-saving water pump comprises a pump body with an inlet and an outlet. The energy-saving water pump for the automobile engine further comprises an impeller assembly. The impeller assembly comprises a rotating shaft, a rotating table, a sliding shaft, a connecting piece and blades. The energy-saving water pump has the advantages that the height and length of the portions, extending out of the rotating table, of the blades can be controlled through an electric pole, and therefore the displacement of the waterpump can be changed; when the blades completely retract, the blades are in a completely-non-working state, and therefore when the engine is in cold start or warm-up, an impeller can stop working, thetemperature of the engine can be rapidly increased, the fuel economy of the engine is improved, energy consumption and emission of the engine can be improved, and the power performance and fuel economy of an automobile can be improved.

The object of the present invention is to provide a control valve for a variable displacement compressor, which is capable of controlling the variable displacement compressor to the minimum capacity without using an electromagnetic clutch, and can be constructed without accommodating a solenoid in a pressure chamber. A plunger of a solenoid is formed by a first plunger and a second plunger, and a diaphragm is disposed between them, for sensing suction pressure Ps, such that the first plunger controls a valve element via a shaft, with component elements of the solenoid except for the first plunger being disposed on a side of the diaphragm where the atmospheric pressure is received. Further, when the solenoid is not energized, the high suction pressure Ps urges the second plunger toward the core via the diaphragm, and a spring causes the first plunger to urge the valve element to the fully open position, which enables the variable displacement compressor to be controlled to the minimum capacity.

The invention provides a water surface garbage collector. The water surface garbage collector is characterized in that one end of a barrel body of a collecting barrel is open, the other end of the barrel body is closed, a water outlet is formed in the barrel bottom, a partition plate is arranged at the end, close to the barrel bottom, in the barrel body, a water suction opening is formed in the partition plate, and the outer diameter of two ring rods of a filtering screen frame is smaller than the inner diameter of a cylinder part of the barrel body by 5mm +/-2mm; the maximum distance between the outer side arc surfaces is equal to the distance between the plate surface of the partition plate and the open end of the barrel body, a filtering screen provided with a plurality of small holes and the filtering screen frame are arranged in the barrel body, and the open end of the filtering screen frame is located at the open end of the barrel body; a flow guiding cover is clamped at the opening ends of the barrel body and the filtering screen frame, and the open end of the filtering screen is clamped between the open ends of the barrel body and the filtering screen frame; a power input shaft of a water pump installed at the bottom of the barrel body is connected with an adjustable-speed motor, a water outlet of the water pump is hermetically connected with the water outlet, a water inlet of the water pump is hermetically connected with the water suction opening of the partition plate through a water suction pipe, and a controller and a storage battery of a control system are installed at the bottom of the barrel body. The water surface garbage collector is high in cleaning efficiency and low in labor intensity.

The invention provides a manual-adjusted variable gear pump. The manual-adjusted variable gear pump comprises a pump body (7), a driving gear (1), a driven gear (6), an adjusting stopper (11), a gear ring (12), a return stopper (3), a return spring (4), a driving shaft (2), a driven shaft (5), an adjusting handle (10), a tooth-shaped slide block (9) and a baffle plate (8); the driving shaft (2) cannot axially move; and the driven gear (6), the adjusting stopper (11) and the return stopper (3) are all mounted on the driven shaft (5), and can move along the driven shaft (5). The adjusting handle (10) is shaken to enable the adjusting stopper (11) to push the driven gear (6), the return stopper (3) and the tooth-shaped slide block (9) to axially move, so that the engagement width of the driving gear (1) and the driven gear (6) can be changed, and the manual displacement adjustment of the gear pump is realized. A displacement adjusting device is simple in structure and convenient to operate, and can change the displacement of the gear pump in real time according to working conditions.

Provided are an adjusting device (30) and an adjusting method for adjusting a motor (10) driven hydraulic pump (20). The adjusting device (30) comprises an adjusting mechanism (35) for adjusting the speed (n) and the stroke volume (VH) of the hydraulic pump (20) for regulating the pressure of the hydraulic pump (20) or the force control or position control of a hydraulic cylinder. Here, the stroke volume (Vh) of the hydraulic pump (20) is either stationary by adjusting the angle ([alpha]) of the hydraulic pump (20) or dynamically adjusted by dynamically adjusting the swivel angle ([alpha]) of the hydraulic pump (20) and the speed (n) of the motor (10) in normal operation. The unit consisting of the hydraulic pump (20), the motor (10) and the drive controller or adjusting device (30) is thereby used as an electro-hydraulic transmission for optimizing the system efficiency.

The invention discloses a stepless adjusting type variable displacement oil pump. The stepless adjusting type variable displacement oil pump comprises an engine body and a case arranged on the enginebody. A slide valve is slidably arranged in the engine body. The eccentricity of the oil pump is changed along with sliding of the slide valve. A hydraulic driving device comprises a piston cavity formed in the engine body in a penetrating mode and a piston slidably sleeved with the piston cavity. A flow control system is connected with the engine body and the piston. All real-time flow parametersin the engine body are sequentially fed back to the flow control system. The flow control system controls the hydraulic driving device to drive the piston to move and drive the slide valve to move, so that the displacement of the oil pump is controlled. According to the stepless adjusting type variable displacement oil pump, by controlling the piston to move, the slide valve is driven to move, thus, the eccentricity of the oil pump is changed, then, the displacement of the oil pump is changed, in the oil flow adjusting process, the rotation speed of an engine is considered, the influence of the oil temperature is also considered, and the effect that the optimal oil flow is achieved at any temperature under any rotation speed of an engine lubricating system is ensured.

The invention relates to a displacement variable oil-well pump. A pump cylinder, a connecting pipe, an oil inlet valve and a small pump are sequentially connected; a large plunger, an oil outlet valve and an uncoupling device are sequentially connected, an oil inlet is arranged between the oil outlet valve and an upper body of the uncoupling device, the diameter of the upper body of the uncoupling device is less than the internal diameter of the large pump cylinder, the inner diameter of the connecting pipe is more than that of the large pump cylinder to ensure that the joint of the lower part of the large pump cylinder and the upper part of the connecting pipe generates a releasing ledge, and the upper body of the uncoupling device and the lower body of the uncoupling device can be separated at the releasing ledge. Due to the combination of the large cylinder and the connecting pipe, a releasing ledge of the uncoupling device is formed, and the displacement of the oil-well pump can be changed by adopting the common uncoupling device; because the outer diameter of the lower body of the common uncoupling device is more than the internal diameter of the releasing ledge, only the uncoupling device is released after lifted to the releasing ledge, and the uncoupling device can be released as long as being lifted to the releasing ledge. The invention can be used for reliably changing the displacement and prolonging the oil well production period, and has remarkable economic benefit.

The invention discloses a movable booster type pump outlet control two-stage variable oil pump, and relates to the technical field of oil pumps. The movable booster type pump outlet control two-stagevariable oil pump comprises a pump body, a pump cover, a pump shaft, a rotor, a sliding block and a spring; a feedback cavity is arranged in the pump body; a control valve is arranged on the pump cover; a plunger is arranged in a valve hole of the control valve; a control valve spring is abutted between the plunger and the rear end of the valve hole; a convex ring is arranged on the circumferential surface of the middle of the plunger; a plug is arranged at the front end of the plunger; an oil inlet and an oil outlet are formed in the side wall of the control valve; the oil inlet communicateswith a pump outlet and located in the front side of the convex ring; a control valve normally-open cavity communicating with the pump outlet is formed between the convex ring and the plug; the oil outlet communicates with the feedback cavity, and is located in the rear side of the convex ring; the pump cover is provided with an oil channel communicating with the pump outlet and an inlet in the front end of the control valve hole; and an electromagnetic valve is arranged in the oil channel. Two-stage variables are achieved through the internal oil duct of the oil pump and the electromagnetic valve, and a feedback oil hole does not need to be designed in an engine cylinder body, so that the structure of the engine cylinder body is greatly simplified.

The invention discloses a medical device implantation unit which comprises a state control module used for adjusting the position of a moving element so as to control the working state of a medical device; the stay wire control module is used for pulling a stay wire to adjust the angle of an upper clamping piece of the medical instrument; the stay wire control module comprises an integrated stay wire element, and the integrated stay wire element comprises a sheath tube and a stay wire tube; wherein the stay wire tube extends out of the end portion of the sheath tube and extends along the axis of the sheath tube, the sheath tube and the stay wire tube are integrally formed, an inner hole of the stay wire tube is axially communicated with a first inner hole of the sheath tube, and the stay wire is arranged in the inner hole in a penetrating mode. According to the invention, an integrated stay wire element design scheme is adopted, i.e., the sheath tube and the stay wire tube are integrally manufactured, so that a gap caused by a fixed connection process between the sheath tube and the stay wire tube is effectively avoided, the problem of leakage of gas in an emptying process is finally avoided, air in an instrument can be efficiently and conveniently exhausted, the risk of gas embolism is eliminated, and the safety of the instrument is improved. And the gas discharge speed is accelerated.

The invention relates to an axial piston machine (18), with a housing (1), for pump and/or motor operation with a variably adjustable displacement volume, having a pivot cradle (2) which can be pivoted by a first adjustment device (3) within an angle range predefined by the first adjustment device (3) and which has at least one surface (22), and having a piston drum (7) which is arranged rotationally fixedly on an axis (24) and which has pistons (12, 120) arranged in the piston drum (7), wherein the pistons (12, 120) bear against the surface (22) of the pivot cradle (2) in such a way that pressure forces can be transmitted between the pistons (12, 120) and the pivot cradle (2). The axial piston machine (18) according to the invention furthermore has a second adjustment device (9, 16) which is movable in such a way that the displacement volume of the axial piston machine (18) can be varied in addition to the displacement volume variably adjustable by means of the first adjustment device (3).

The invention discloses a through-shaft axial piston pump capable of realizing energy recovery, and relates to the technical field of fluid machinery. The through-shaft axial piston pump comprises a pump body, a transmission shaft, a cylinder body, a swash plate, wherein an axial hole is formed in the cylinder body, and a piston is arranged inside the axial hole; the through-shaft axial piston pump further comprises a piston resetting device; an inner cavity of the cylinder body comprises a rodless cavity located on the side, away from the swash plate, of the right side of the piston as well as a rod cavity located on the left side of the rodless cavity and internally provided with a piston rod, wherein the rod cavity and the rodless cavity communicate with the outside of the cylinder bodythrough channels; and the pump body is further provided with a first fluid discharge channel, a first fluid indraft flow channel, a second fluid indraft channel and a second fluid discharge flow channel. According to the through-shaft axial piston pump capable of realizing energy recovery, input of external force is effectively reduced, recycling of waste energy is achieved, the structure is simple, manufacturing is convenient, lubricating effects of the piston are improved, friction is reduced, good economic benefits are brought, and adaptability is high.

The invention relates to a method for calibrating a continuous valve which is arranged in a hydraulic system and can be adjusted proportionally with respect to an actuation signal of an electronic control unit. According to the invention, the method comprises the following steps: 1) regulating the pump pressure to a preset pressure when the continuous valve is closed; 2) detecting a value at least for the displacement of the hydraulic pump; 3) changing, in particular raising, the control signal of the continuous valve starting from the initial control signal until a difference between a current pump volume flow rate and a predetermined pump volume flow rate corresponding to a predetermined volume flow rate is detected in the case of a closed flow cross-section of the continuous valve; 4) determining an offset of the control signal by comparing the control signal of the continuous valve detected when the predetermined volume flow is reached with a theoretical control signal.

The invention provides a double glide transmission mechanism, which comprises a first glide transmission branch mechanism and a second glide transmission branch mechanism, wherein the first glide transmission branch mechanism and the second glide transmission branch mechanism comprise two slideways, two slide blocks, three connecting levers and four connecting rods; a few connecting levers and connecting rods are adopted, so that the double glide transmission mechanism is simple in structure and convenient to manufacture and mount and transmits large kinetic energy, and the double slide of the two slide blocks can be realized through one input; the three connecting levers employ two support shafts, and the structure is compact; small angles are formed between the connecting rods and the slideways, so that the friction between the slide blocks and the slideways is reduced and the slide blocks slide smoothly; and in a time interval in the moving process of the two slide blocks, one slide block decelerates, the other slide blocks accelerates, the decelerating impulse of the decelerating slide block helps accelerate the accelerating slide block, and drive energy is saved.