9results about How to "Improve volumetric efficiency" patented technology

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 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 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 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.

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.

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.