33results about How to "Reduce fatigue loss" patented technology

The invention relates to an oil-well pump capable of direct flushing. The oil-well pump is underground equipment which has the effects of sand prevention, gas prevention, wax prevention and high pump efficiency and is applied to oil exploration industry. In the oil-well pump, an upper plunger piston and a lower plunger piston are equipped with sand prevention slots, can send the sands deposited in the sand prevention slots to the underside of the pump to realize sand prevention. When the plunger pistons fall to a pump-bumping position, oil pipes above and below the pump are in communicated state by a pump cavity, thereby realizing the function of direct flushing. In the oil-well pump, an oil inlet valve can be opened easily under the hydraulic feedback action, thereby increasing the fullness coefficient, reducing the bend of a sucker rod, increasing the effective stroke of the pump, preventing air lock, reducing the fatigue loss of the sucker rod, and the oil-well pump has the functions and the characteristics of gas prevention and high pump efficiency.

The invention discloses a transverse and longitudinal integrated non-power framework device with temperature-measurable axle boxes, and belongs to the field of railway vehicle framework devices. The transverse and longitudinal integrated non-power framework device comprises a transverse and longitudinal integrated interconnection framework and four annular vibration reduction axle boxes. The transverse and longitudinal integrated interconnection framework comprises two transverse and longitudinal integrated frameworks, and each transverse and longitudinal integrated framework comprises an integrated side beam and an integrated cross beam which are integrally formed. Each integrated side beam comprises a side beam middle section which serves as two bird wing connecting parts and is locatedat a lower position, and two bird-wing-shaped side beam cantilever sections which are symmetrically and fixedly connected to the two ends of the side beam middle section. On the premise that the installation position and the vibration reduction index of a primary suspension axle box device are guaranteed, the overall transverse width size and the turning radius of the bogie are effectively reduced, the curve passing capacity of the bogie is further improved, the vibration influence degree of the bogie on a vehicle body is reduced to the minimum, the balance stability and comfort of the vehiclebody are enhanced, the fatigue loss of the overall structure is effectively reduced, and the overall service life of the bogie and the vehicle body is greatly prolonged.

The invention discloses a control method for triggering a variable pitch action instruction of a wind driven generator according to a mean value. According to a variable pitch control policy for the case that the wind speed fluctuates up and down around the rated wind speed of the wind driven generator, when a variable pitch system detects that the rotating speed, the output power or the wind speed of the generator is higher than the rated value, the variable pitch system starts acting to adjust the pitch angle of a fan paddle and reduce the fan capture power so as to keep the output power of the wind driven generator stable. The past control methods only concentrate on stable control on the output power; however, due to the randomness and instability of wind, the wind speed is possible to fluctuate up and down around the rated wind speed of the wind driven generator and the rotating speed and the power of the wind driven generator also fluctuate up and down around the rated values, and consequently, the variable pitch system is leaded to frequent actions to result in fatigue loss of the variable pitch system. The invention provides a wind driven generator variable pitch control method base on a mean value algorithm, and the control method is capable of greatly improving the action smoothness of the variable pitch system, reducing the fatigue loss and improving the reliability of the system.

The invention discloses a dry indirect-cooling-storage type peak cooling system of a thermal power generating unit. The dry indirect-cooling-storage type peak cooling system comprises a turbine low pressure cylinder, wherein the lower end of the turbine low pressure cylinder is connected with an exhaust steam pipe matched with the turbine low pressure cylinder, the exhaust steam pipe is connected with a jet-type condenser through a butterfly control valve and is connected with a condensing water tank through a condensing water pump, and another end of the exhaust steam pipe is connected with an air cooled condenser; the exhaust steam pipe is provided with a stem dispensing pipeline of the air cooled condenser on which a cooling and mixing device is arranged; the cooling and mixing device comprises a cooling water delivery pipeline and a plurality of cooling water nozzles formed in the cooling water delivery pipeline, the air cooled condenser is connected with a circulating water collecting tank through a condensed water tank, and the circulating water collecting tank is connected in a cooling chamber in the cooling system through a water taking pump; the cooling chamber is respectively connected with a dry air forced ventilation cooling system and a voltage compression refrigerating system, the cooling chamber is connected with the jet-type condenser through the circulating water collecting tank, and the air cooled condenser is connected to a water circulating vacuum pump in an air extractor and is sequentially connected with a gas water separator and a cooler; one end of the cooler is connected with a cooling chamber, and the other end of the cooler is connected with a circulating water collection tank.

The invention discloses a detachable electric lifting module and belongs to the field of lifters. The detachable electric lifting module comprises a carrying module used for providing the weight of anobject and having the overweight warning function, a lifting module used for driving the carrying module to rise and drop, a fixed module used for being fixed to a mobile device and an energy storagemodule used for storing hydraulic energy generated by the object during dropping and reducing the bearing capacity of the lifting module. The detachable electric lifting module is provided with a double-lifting mechanism, is quick and accurate in rising and dropping and free of vibration. The wear rate of a driving component is low. Moreover, the detachable electric lifting module can improve themechanical efficiency or the energy utilization rate and has the weighing and overweight warning functions.

A novel rotary-wing aircraft is composed of main body, mainshaft, rotary wings, horizontal drive clutch, power system, rear wings and horizontal drive propeller. The rotary wings fixed to top end of mainshaft are adjustable-pitch torsional blades and used for vertical taking off or landing. Said horizontal drive propeller is used for horizontal flying. Its advantages are high safety and efficiency, and low cost and noise.

The invention provides a pre-filled catheter flusher. The pre-filled catheter flusher comprises a liquid storage container 1 which is at least partially deformable, wherein the liquid storage container 1 is provided with an injection port 10, and one end of the injection port 10 of the liquid storage container 1 is provided with a pressure applying device 2 capable of closing the injection port 10 from the outside of the liquid storage container 1; when the pressure of the flushing fluid reaches or is more than a preset value due to deformation of the liquid storage container 1, the flushing fluid overcomes the resistance applied to the injection port 10 by the pressure applying device 2 to achieve flushing. According to the pre-filled catheter flusher, the flushing fluid can be prevented from flowing back to the fluid storage inner cavity 11, the pressure applying device 2 does not make contact with the flushing fluid, so that the requirement for materials of the pre-filled catheter flusher is relatively low, the product manufacturing cost is reduced, the product production process is simplified, and use is safe and reliable.

The invention provides an energy-saving pumping unit with two horse heads. The energy-saving pumping unit with the two horse heads comprises a base, a support, a walking beam, the front horse head, the rear horse head and a speed controller, wherein the support is fixedly arranged on the base, the walking beam is arranged on the top of the support, one end of the walking beam is connected with the front horse head, a wind power generation device is arranged on the top of the walking beam and is connected with a second motor through a PLC, an adjustment hole is formed in the middle of the walking beam, the adjustment hole is connected with a balance block through an adjustment rod, and the balance block is connected with the second motor. According to the energy-saving pumping unit with the two horse heads, the adjustment hole is connected with the balance block through the adjustment rod, the balance block is connected with the second motor, and thus the stability of the pumping unit is improved; the second motor is connected with the wind power generation device, and thus production cost is reduced. The energy-saving pumping unit with the two horse heads has the advantages that the oil production efficiency is high, the fatigue loss of the pumping unit is reduced, the mechanical efficiency is improved, and production cost is reduced.

The invention relates to a micro-driver in the technical field of MEMS, and belongs to a segmented-type double-layer membrane electric heating drive MEMS switch with a compliant mechanism. The switchcomprises a substrate, a segmented-type double-layer membrane electric heating drive unit, a base, and an electric contact unit. The double-layer membrane electric heating drive unit, the base and theelectric contact unit are located on a substrate, and the double-layer membrane electric heating drive unit is fixed on the base. The base is fixedly connected with the substrate, and the electric contact unit is disposed above the segmented-type double-layer membrane electric heating drive unit. The electric contact unit comprises a static contact point, a V-shaped support beam, a flexible spring, and an arc-shaped electric contact mass block. The V-shaped support beam is fixed above the segmented-type double-layer membrane electric heating drive unit, and the arc-shaped electric contact mass block is connected to the V-shaped support beam through the flexible spring. The static contact point is disposed above the arc-shaped electric contact mass block, and the static contact point cooperates with the arc-shaped electric contact mass block, and is connected with a peripheral circuit.