19results about How to "Improve volumetric efficiency" patented technology

The utility model discloses a diaphragm adjusting device of a diaphragm compressor under low-negative-pressure air inlet. The diaphragm adjusting device comprises a piston assembly, a crosshead assembly, an air distribution disc and an oil distribution disc. The three metal diaphragms are arranged between the gas side diaphragm cavity and the oil side diaphragm cavity in an overlapped mode, and the middle diaphragm is provided with a guide groove to be communicated with the leakage detection opening; the electromagnet is arranged on the surface layer, close to the diaphragm side, of the oil distribution disc; the piezoelectric ceramics are respectively fixed in the machine body assembly and are close to an upper dead center and a lower dead center of the crosshead assembly; the springs are fixed on the two sides of the machine body assembly, are insulated from the crosshead assembly and are used for triggering the piezoelectric ceramics; the electromagnets are electrically connected with the piezoelectric ceramics respectively; the switch is attracted and controlled by the electromagnet to switch on and off of a circuit; the slide rheostat is connected in series with the electromagnet to adjust the adsorption force; the spring impacts the piezoelectric ceramic when the crosshead assembly moves to the upper stop point and the lower stop point, current is excited to enable the electromagnet to attract the switch, and then power-on and power-off of the electromagnet are controlled.

The present application relates to the technical field of positive displacement fluid machinery, and particularly relates to a low-noise three-screw rod pump and a ship hydraulic system. The low-noise three-screw rod pump comprises a new active screw rod, a positioning sleeve, two new driven screw rods, and a smooth section. The positioning sleeve is provided on the smooth section of the new active screw rod in an interference fit. The positioning sleeve is provided with an annular limiting groove. The two new driven screw rods are symmetrically matched with the new active screw rod. The front end of the new driven screw rod is provided with a cylindrical guide section. The cylindrical guide section is rotatably embedded in the annular limiting groove. The circumferential surface of the cylindrical guide section is provided with a tapered oil guide surface. The tapered oil guide surface is clamped between the inner wall of the bushing and the annular limiting groove with a set radial gap. The low-noise three-screw rod pump and the ship hydraulic system solve the technical problems of vibration noise increase caused by the large axial installation gap and the radial thermal expansion and jamming.

The application provides a radial plunger hydraulic device and relates to the technical field of hydraulic transmission. The radial plunger hydraulic device comprises a flow distribution part connected with an eccentric main shaft, the flow distribution part comprises a first high-pressure flow distribution window, a first low-pressure flow distribution window, a second high-pressure flow distribution window, a second low-pressure flow distribution window, a high-pressure oil hole and a low-pressure oil hole; the flow distribution part is adapted to rotate with the eccentric main shaft and is configured to be capable of controlling the first high-pressure flow distribution window and the first low-pressure flow distribution window to be connected with the first control oil path in advance / delayed or controlling the second high-pressure flow distribution window and the second low-pressure flow distribution window to be connected with the second control oil path in advance / delayed, so that the hydraulic control one-way valve is closed when the two-way plug-in valve is opened or the hydraulic control one-way valve is opened when the two-way plug-in valve is closed. Through the scheme, the volumetric efficiency of the radial plunger hydraulic device can be improved and the impact and vibration can be relieved.

The invention discloses an electronic water pump, a heat management system and a vehicle. The electronic water pump comprises a pump shell provided with a liquid inlet and a liquid outlet, the inner wall face of the pump shell comprises a matching circumferential face and an annular sealing face connected with one axial end of the matching circumferential face, and the matching circumferential face extends in the circumferential direction of the liquid inlet; a liquid inlet cylinder section is arranged at one axial end of the impeller assembly, and at least part of the liquid inlet cylinder section is located in an area defined by the matching circumferential face; the floating opening ring is arranged between the matching circumferential surface and the outer circumferential surface of the liquid inlet cylinder section, the floating opening ring can axially float so as to abut against the annular sealing surface for sealing when the impeller assembly rotates, the inner diameter of the matching circumferential surface is M, the outer diameter of the liquid inlet cylinder section is N, the outer diameter of the floating opening ring is P, the inner diameter of the floating opening ring is L, and M-P is larger than L-N. According to the electronic water pump, the hydraulic efficiency is obviously improved, the required motor efficiency is lower, the size and weight of the motor are reduced, light weight is achieved, the cost is reduced, and the floating opening ring is simple in structure, small in part number and easy to assemble.

The utility model discloses a groove outer vertical type pumping, including main body pump shell, front cover, install in the top of main body pump shell, impeller subassembly is installed in the inside of front cover, drive shaft, rotates and is installed in the inside of main body pump shell, and its top end extends to the inside of front cover and is connected with impeller subassembly, through the setting of impeller subassembly, the back rib of impeller in impeller subassembly is located in the inside of main body pump shell top reservation space, and this ingenious design effectively reduces the gap between impeller and main body pump shell, in the process of pumping operation, and the gap control makes the liquid leakage amount reduce greatly, and more liquid can be transported according to the predetermined path, thereby the volumetric efficiency of pumping is improved significantly, and because the gap reduces, the friction and abrasion produced between impeller and pump shell by relative movement also reduce accordingly, make the service life of impeller and pump shell be effectively prolonged, and the maintenance cost and replacement frequency of equipment are reduced.

The utility model discloses a novel low-pressure oil pump with a strong heat-resistant armature, and relates to the field of automobile accessories. The novel low-pressure oil pump with the strong heat-resistant armature comprises an oil pump body and an armature unit, the oil pump body comprises a shell, a lower end cover and an upper end cover, an oil inlet is formed in the bottom of the lower end cover, a widened containing groove is formed in the lower end cover, and the armature unit comprises an armature body, a driving shaft and a thickened impeller. The armature body is installed in the shell, one end of the driving shaft is connected with the armature body, and the thickened impeller is rotationally arranged at the end of the driving shaft and rotationally arranged in the widened containing groove. According to the novel low-pressure oil pump with the strong heat-resistant armature, under the same rotating speed, the thickened impeller can extract and convey more fuel oil when rotating each time, so that the volumetric efficiency of the oil pump is improved, the single-circle oil supply amount of the oil pump is increased, the required oil supply pressure can be achieved under the lower rotating speed, and the environment temperature can be reduced.

The invention discloses a multi-feed-source coaxial-waveguide composite resonance microwave heating device and a control method, the multi-feed-source coaxial-waveguide composite resonance microwave heating device comprises a waveguide cavity and a plurality of coaxial coupling structures, the top surface of the waveguide cavity is open, and the plurality of coaxial coupling structures are integrated in the cavity wall of the waveguide cavity. Each coaxial coupling structure comprises a coaxial port and a coaxial coupling helix which are connected with each other, the coaxial port serves as an input end of the feed source, and a microwave signal is input into the waveguide cavity through the coaxial port and the coaxial coupling helix in sequence to heat an object to be heated in the waveguide cavity. A coaxial and waveguide composite resonance mode is constructed, impedance matching and heating uniformity are further optimized in combination with gradual change spiral parameter design and a multi-source heating control method, and the method is suitable for the field of industrial heating and precise material processing with extremely high temperature uniformity requirements.

The application provides a involute variable-thickness gear pump, and belongs to the technical field of fluid machinery. The gear pump adopts a pair of involute variable-thickness driving gears and driven gears to form a parallel shaft external meshing pair, the thickness of the gears continuously changes along the width direction, and the meshing gap can be self-adaptively adjusted through axial position fine adjustment; the gear pair forms a gradual meshing area along the axial direction, has a dynamic thickness compensation effect, can significantly reduce fluid oil trapping, reduce flow pulsation, improve volumetric efficiency and operation stability. The application has simple structure and strong adaptability, can be compatible with straight teeth / oblique teeth, external meshing / interior meshing structure, and is suitable for high-pressure, low-noise, long-life hydraulic and fluid conveying systems.

The present application relates to a fuel cell module, each of a plurality of fuel cell stack units of the fuel cell module having: a plurality of cells stacked along a first direction; a pair of end plates disposed at both ends of the plurality of cells in the first direction; and a plurality of fastening members erected between the pair of end plates along the first direction to restrain the plurality of cells, the plurality of fuel cell stack units being stacked along a second direction orthogonal to the first direction, the plurality of fastening members including at least one first fastening member on one side of the second direction with respect to the plurality of cells and at least one second fastening member on the other side of the second direction with respect to the plurality of cells, each of the at least one first fastening member being disposed at a position different from any of the at least one second fastening member in a third direction substantially orthogonal to the first direction and the second direction.

The application provides a piston structure for a coal slurry conveying diaphragm pump, which comprises a piston cylinder, a piston rod, a piston disc, and a clamping nut; a threaded mounting section and a piston disc mounting section are sequentially arranged in the middle of the piston rod from left to right; the piston disc is sleeved on the piston disc mounting section of the piston rod and is used for dividing the piston cylinder into two mutually isolated working cavities; the left end of the piston rod penetrates through the piston cylinder; the piston structure further comprises a positioning table; the positioning table is located on the right side of the piston disc mounting section and is integrally arranged with the piston rod, the perpendicularity between the left end surface of the positioning table and the piston rod is not greater than 0.01 mm; the clamping nut is threadedly connected with the threaded mounting section of the piston rod and is used for pressing the piston disc on the left end surface of the positioning table. The piston structure for the coal slurry conveying diaphragm pump, the piston disc is fixed on the piston rod through the positioning table and the clamping nut, the positioning table is integrally arranged with the piston rod, the perpendicularity of the positioning end surface is ensured, and the internal leakage of the piston cylinder is effectively avoided.

The utility model discloses an electronic water pump, heat management system and vehicle. Electronic water pump includes: pump shell is equipped with liquid inlet and liquid outlet, and the inner wall surface of pump shell includes cooperation circumference surface and the annular sealing surface that is connected with the axial one end of cooperation circumference surface, and cooperation circumference surface extends along the periphery of liquid inlet, impeller subassembly, axial one end is equipped with liquid inlet cylinder section, and liquid inlet cylinder section is at least partially located in the region surrounded by cooperation circumference surface, and the outer periphery between cooperation circumference surface and liquid inlet cylinder section is equipped with floating mouth ring, and floating mouth ring can axially float to abut and seal with annular sealing surface under the state that impeller subassembly rotates, and the inner diameter of cooperation circumference surface is M, and the outer diameter of liquid inlet cylinder section is N, and the outer diameter of floating mouth ring is P and the inner diameter is L, and M-P is greater than L-N. The hydraulic efficiency of the electronic water pump according to the utility model embodiment is improved obviously, and the required motor efficiency is lower to reduce the volume and weight of motor, realizes light weight and reduces cost, and the floating mouth ring structure is simple, and the part quantity is few and easy to assemble.

A volute of the energy-saving type vertical centrifugal foam pump comprises a rigid shell and an elastic lining which are coaxially arranged, the outer side wall of the elastic lining and the inner wall of the rigid shell are connected in a sealed mode and form a closed control cavity, and a plurality of elastic frameworks are distributed in the control cavity; the pump body is provided with a jet vacuum generator, the jet vacuum generator comprises a nozzle inlet, a throat pipe suction chamber and a diffusion pipe outlet which are communicated in sequence, the nozzle inlet is communicated with the liquid discharge pipe through a high-pressure drainage pipe, and the diffusion pipe outlet is communicated to a low-pressure backflow area of the pump body; a negative pressure feedback pipe is connected between the throat pipe suction chamber and the control cavity, and when pumped fluid passes through the nozzle inlet, negative pressure generated in the throat pipe suction chamber sucks the control cavity, so that the elastic lining extrudes the elastic framework and is attached to the rigid shell. The energy of high-pressure fluid at a pump outlet is utilized, controllable negative pressure is generated through the jet flow vacuum generator, the elastic lining is driven to generate radial shrinkage deformation, the section of a volute flow channel is dynamically optimized, and cavitation can be actively restrained.

The application discloses a double gear pump, a front pump assembly comprises a front pump body and a front cover, a rear pump assembly comprises a rear pump body, the front cover is fixedly connected with the front pump body, the front pump body is fixedly connected with the rear pump body, a front pump connecting portion is arranged between the front cover and the front pump body, a rear pump connecting portion is arranged between the front pump body and the rear pump body, and the front pump connecting portion and the rear pump connecting portion are both provided with a first connecting assembly and a second connecting assembly. The front pump body and the front cover are positioned and connected through the front pump connecting portion, the front pump body and the rear pump body are positioned and connected through the rear pump connecting portion, there is no intermediate body structure between the front pump and the rear pump, and the overall structural compactness and connection stability are improved. Since the second connecting assembly is arranged between the front cover and the front pump body and between the front pump body and the rear pump body, the first connecting assembly of the front pump body and the rear pump body can both achieve the effect of inhibiting movement, the positioning precision and transmission precision of the gear pump are improved, and the volumetric efficiency under various rotational speeds and pressures is improved.

A thermal storage device (100, 300, 600) for an air conditioning apparatus comprises: a phase change material, PCM (102, 302, 602); a plurality of thermally conductive elements (104, 304, 604); and a heat sink (106, 306, 606) in thermal contact with the thermally conductive elements, the heat sink being for transferring heat from a heat exchanger of the air conditioning apparatus to the thermally conductive elements, wherein the thermally conductive elements are embedded within the PCM.

The utility model relates to the technical field of compressors, and discloses a conveniently overhauled compressor case which comprises a base, a front cover fixedly connected to the right side of the top of the base, a sound insulation support fixedly connected to the right side of the top of the base, an air inlet duct fixedly connected to the top of the sound insulation support, and a top cover fixedly connected to the top of the front cover. A cooler is installed at the bottom of the top cover, a wind scooper is fixedly connected to the bottom of the cooler, an axial flow fan is installed at the bottom of the wind scooper, a machine cover is tightly attached to the left side of the front cover, and a connecting mechanism is arranged on the front side of the front cover. According to the compressor case, airflow is guided to enter the air filter in a concentrated and accelerated mode through the second ventilation filter screen and the air inlet duct, the air inlet amount of the air filter is improved, vibration generated when the compressor operates is attenuated through the sound insulation support, and therefore noise generated when the compressor operates is reduced while the air inlet efficiency of the compressor case is improved.

This application discloses a wear-resistant structure for a screw pump rotor and its manufacturing method, belonging to the technical field of petroleum machinery equipment. The structure includes a metal rotor body, the outer surface of which has at least one groove extending along the rotor's helical direction in a circumferential high-wear zone determined by the relative motion trajectory between the rotor and stator. An elastic filler is embedded within the groove, forming a protrusion protruding from the outer surface of the metal rotor body. This protrusion is used to form an elastic compression contact with the inner wall of the stator after the rotor is assembled into the stator. By precisely positioning the high-wear zone and setting the elastic filler, this application achieves the dual effects of flexible contact buffering of wear and pre-compression sealing to improve volumetric efficiency, effectively solving the problems of uneven rotor wear and poor sealing performance in the prior art.

The application belongs to the technical field of air supercharging and provides a machine head of a piston type full-oil-free supercharger, which comprises a body and at least one cylinder arranged along the radial direction of the body, the body and the cylinder are arranged as a hollow chamber structure surrounded by a side wall, the cylinder comprises a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, a fifth cylinder and a sixth cylinder, wherein the first cylinder, the second cylinder, the third cylinder and the fourth cylinder, the fifth cylinder and the sixth cylinder are arranged to be uniformly distributed along the radial central axis of the body, and the axes of the first cylinder and the fifth cylinder coincide as a straight line, and the axes of the second cylinder and the sixth cylinder coincide as a straight line. The application adopts a six-cylinder design, has strong power balance, low vibration, large heat dissipation area, high exhaust volume and efficiency, and can easily realize a multi-stage compression structure to provide high supercharged gas.

The invention discloses an integrated piezoelectric pump based on a reciprocating displacement active valve, which belongs to the technical field of valved piezoelectric pumps, and comprises a reciprocating displacement pumping composite assembly, a combination chamber, a pump body shell, a passive liquid inlet assembly and a passive liquid outlet assembly, the combination chamber is connected into the pump body shell in a sliding mode, and the reciprocating displacement pumping composite assembly is installed on the combination chamber. The reciprocating displacement pumping composite assembly comprises a left displacement composite substrate and a right displacement composite substrate which are the same in structure. The left displacement composite substrate is of a series arch structure and comprises piezoelectric ceramics, a left displacement substrate, k pumping substrates, a displacement driving supporting part, k-1 lower supporting parts, a swing supporting part and an upper supporting part. The piezoelectric ceramic vibrates to drive the pumping base plate on the lower side of the piezoelectric ceramic to vibrate up and down, the displacement driving supporting part and the swing supporting part swing in a reciprocating mode, and k-1 lower supporting parts are kept still. Circulating reciprocating displacement of the combined chamber relative to the pump body shell can be achieved, and then the active liquid inlet valve and the active liquid outlet valve are opened alternately.