182 results about "Pump design" patented technology

Performance parameters for a reciprocating pump including pulsation energy, temperature energy, solids, Miller number and chemical energy and the like are monitored and employed to at least periodically compute a total energy number over the operating life of the pump. The current computed value is compared to a predictive failure value empirically determined for the respective pump design, to determine when failure is likely to be imminent. Scheduling of maintenance with other pumping operations and objective rating of competing designs is possible based on the total energy number.

The invention relates to the technical field of horizontal well fracturing, and discloses a new fracturing process suitable for the encrypted development of a shale gas well, which comprises the following steps of (1) collecting the data; (2) analyzing the stress and compressibility; (3) designing the interval of the segment clusters; (4) designing the number of clusters; (5) carrying out the temporary plugging design in the midway; (6) designing the construction displacement; (7) designing a fracturing scale; and (8) designing a sand adding mode. According to the essence of the method, the small-section multi-cluster segmented design of reducing the section cluster spacing is carried out on the target horizontal well by analyzing the single well ground stress characteristics and the compressibility of the shale gas well of encrypted development; meanwhile, the pumping design of the variable-density perforation, midway ball throwing temporary plugging and continuous sand adding is combined, and finally, the effect of improving the single well transformation complexity and the reservoir transformation efficiency is achieved, the volume transformation of the whole horizontal well isachieved, the crack complexity is improved, the transformation strength is improved to a larger extent through improvement of a sand adding mode and a pumping program, and meanwhile the single well construction cost is reduced.

The present invention provides a fluid delivery system having a first chamber, a second chamber and a third chamber; a flow-through pump element separating the first chamber from the second chamber; a moveable pump element separating the second chamber from the third chamber; a first outlet in communication with the third chamber; and second outlet in communication with the second chamber. Additionally, the present invention provides methods of operating a fluid delivery system having a first chamber, a second chamber and a delivery chamber by reducing the volume of the second chamber while increasing the volume of the delivery chamber without operation of a flow-through pump element that separates the second chamber from the first chamber.

A multichamber tank for motor vehicles comprises two chambers (4, 5) connected via a constricted region (6) located high up in the chambers, a first chamber (4) having a filler neck (2), and a line (13) bridging the constriction forming the connection to a second chamber (5). In order that both chambers are filled at approximately the same speed during filling-up through the filler neck (2), a pump (11) designed for level equalization during filling-up and driven by an electric motor (12) is provided in the line (13), and a level sensor (17, 18) is provided in each of the two chambers (4, 5), the output signals of which sensors are available to a control unit (14) which controls the electric motor (12) of the pump (11).

In accordance with an embodiment of the present invention, a pump assembly for circulating a supercritical fluid is disclosed. The pump assembly comprises an impeller for pumping fluid between a pump inlet and a pump outlet; a rotating pump shaft coupled to the impeller, wherein the pump shaft is supported by corrosion resistant bearings; a rotor of a DC motor potted in epoxy and encased in a non-magnetic material sleeve; and a stator sealed from the fluid via a polymer sleeve. The pump can be of centrifugal type. The bearings can be made of silicon nitride balls combined with bearing races made of Cronidur® and can operate without oil or grease lubrication. The polymer sleeve can be a PEEK™ sleeve which forms a casing for the stator. The non-magnetic material sleeve encasing the rotor of the DC motor is preferably made of stainless steel. A portion of the fluid passing through the pump assembly can be diverted over the bearings and/or the rotor and stator.

The invention discloses a solar thermal power high-temperature long shaft molten salt pump. The solar thermal power high-temperature long shaft molten salt pump comprises a pump shaft, a hydraulic part, a supporting vibration reduction structure, a fluid seal structure and a bearing cooling device are sequentially arranged on the pump shaft from bottom to top, a suction segment is arranged at the front end of the hydraulic part, a blade grid type filter is arranged on the front end of the suction segment, a tail stage flow guide shell is arranged at the tail end of the hydraulic part, the tail end of the tail stage flow guide shell and the front end of a supporting pipe of the supporting vibration reduction structure are fixedly connected, and the tail end of the supporting pipe of the supporting vibration reduction structure is fixedly connected with the bottom of the outlet segment of the fluid seal structure through a flange plate. The solar thermal power high-temperature long shaft molten salt pump is designed to be in the center flow-out manner, thermal expansion uniformity under the high-temperature state can be ensured, through solution schemes of reliable fluid seal design, reasonable cooling structures, flange type expansion joint vibration reduction configuration and the like, safe, reliable and efficient running of the solar thermal power high-temperature long shaft molten salt pump is ensured, and meanwhile, various property indexes are met.

A split-pressure, dual-pump system for supplying hydraulic fluid to a multi-speed transmission is provided. The system includes a low-pressure work circuit operatively connected to a fixed displacement pump, and a high-pressure work circuit operatively connected to a variable displacement pump. The system also includes a regulator valve fluidly coupled to the variable displacement pump via a decrease circuit and an overage circuit for regulating the flow of fluid to the high-pressure work circuit. The invention consists of separating the high-pressure needs of the system into a separate work circuit from the low-pressure needs of the system, and optimizing pump design separately for each work circuit to maximize transmission efficiency and reduce parasitic losses. A method of supplying hydraulic fluid to a multi-speed transmission at variable flow and pressure is also provided.

The invention relates to a design of a Roots pump, in particular to a rotor of a Roots dry vacuum pump which discharges directly into atmosphere and processing technology thereof. The processing technology substitutes a waist arc for an involute to design a rotor block, the rotor block is separately processed and then assembled with a spigot shaft. The processing steps are as follows: (1) processing the rotor block: a ductile cast iron bar is selected as roughcast; processing method: firstly processing the outer surface and the two end surfaces of the bar, incising the bar according to the thickness of the rotor block, then processing other two surfaces (outer circular surface and inner circular surface) of the rotor block, finally incising the bar into the rotor block with needed thickness according to application requirements; (2) joining two rotor blocks and a pin roll into a whole via a pin hole. The invention has the advantages of simple processing technology, low cost, high versatility of parts, suitability for IC equipments, etc.

What is new in the art (or rather, technique) in the structuring of the linkage mechanism as it is most commonly used in the design of reciprocating piston heat/pressure engines and pumping/compressing machines are the two alterations and the combination thereof that I have invented. They are, #1, establishing a (very large) fixed and permanent offsetting, or asymmetry, between the geometric center axi of the cylinder and crankshaft for the purpose of altering the fundamentals of the working cycle, #2, the addition of a sub-link to the connecting rod such that it then also functions as an extension (alternately increasing and decreasing the working, or effective length) of the crankshaft arm during the rotation of the crankshaft, and #3, the combining of these two improvements as one unit, or in one machine.

A dual chamber mixing pump design is disclosed which allows two different sources of fluid to be combined into one mixed product fluid. The pump is divided into two chambers, the proximal chamber and the distal chamber. The chambers are defined in part by a piston having proximal and distal ends and recessed sections. The pump utilizes one common driving mechanism to axially rotate and laterally reciprocate the piston to provide continuous pumping of fluids with reduced pulsations. Each fluid enters through its own pump inlet and outlet. For mixing applications, the outlets are joined together. The flow volume per stroke of each chamber is determined by the lateral stroke of the entire piston assembly and also by the annular areas of the proximal and distal ends of the piston. The flow volume per stroke may be altered by varying the piston and shaft diameters for each chamber. This allows mixing of two fluids in any ratio or proportion desired. Alternating pulses of the two chambers provide a stream which has small segments of alternating fluid from each inlet. Such segmented streams can become more thoroughly mixed through normal flow characteristics of the downstream flow path, providing more effective mixing.

The present invention provides an addressable multi-channel peristaltic pump. According to the invention, this pump design allows for selection and operation of one or more pump heads on a drive shaft, while locking other non-selected pump heads in a stationary position. It is possible to operate the multi-channel pump using a limited number of motors, preferably two motors: a selector motor and a dispense motor. Thus, the pump provides for pumping or dispensing of one or more fluids without the need for multiple pumps. Likewise, compared with typical single motor multi-channel systems, where all pump heads on the drive shaft must rotate at the same time, the present invention provides for selective dispensing of one or more fluids. The pumps of the present invention are suitable for any multiple fluid transfer application, including in automated multi-channel reagent dispensing systems, such as nucleic acid purification systems.

The invention discloses a multichannel OLED (Organic Light Emitting Diode) life testing system based on a Howland current pump, comprising a lower computer, an upper computer and a plurality of OLED sample fixing boxes, wherein the lower computer comprises a micro controller module, an AD/DA (analog-to-digital/digital-to-analog) module, a current pump module, a signal processing and selecting module and a serial port; the current pump module, the OLED sample fixing boxes, the signal processing and selecting module, the AD/DA module, the micro controller module, the serial port and the upper computer are connected sequentially; and the AD/DA module is connected with the current pump module. The multichannel OLED life testing system disclosed by the invention adopts an improved Howland power pump design and provides the accurate and stable constant current output; combined with the upper computer design based on Labview, the multichannel OLED life testing system is simple, convenient and fast and supports the simultaneous testing operation of a plurality of samples, the half-life period of each point on the sample under certain constant current can be obtained from returned data, and the half-life period under any current can be calculated, so that the testing efficiency is greatly improved.

The invention relates to a pump, in particular to a pump for conveying fluent metal. The invention reaches a design aim through changing the related size of the pump. A low pump lift and large specific gravity liquid delivery pump designed according to the technical proposal provided by the invention has the minimal production capacity which can achieve the conveying capacity of 500 ton per hour in a minimal rotational speed in a frequency-conversion and speed-regulation range, thereby realizing a large output quantity of large specific gravity liquid and meeting the needs of improving process and production capacity.

The invention relates to a diagonal flow pump impeller hydraulic design method. A design formula about main geometric parameters of the impeller is given, and includes an included angle Alpha between the outlet of the diagonal flow pump impeller and the horizontal line, the actual thickness Delta of each point of each vane, vane wrap angle Phi, the inlet fillet radius RTS of the rear cover plate of the impeller, the number z of impeller vanes, the diameter D2 of the impeller outlet, the width b2 of the vane outlet, the equivalent diameter D0 of the impeller inlet, a distance ZE between the vane inlet of the front cover plate and the outlet of the front cover plate of the impeller, a distance g1 from the inlet edge to the initial end of the curve of the front cover plate, the inlet fillet radius RDB of the front cover plate of the impeller, round nut radius Ra of the impeller, round nut height Rb of the impeller, the placing angle of the vane Beta, the placing angles Beta1 of inlet of the vane, the placing angles Beta2 of inlet of the vane, the slipping coefficient Rho and the hydraulic efficiency Etah. According to the impeller of the diagonal flow pump designed by the invention, the hydraulic efficiency of the impeller and the stability performance of the diagonal flow pump are improved, and computer programming is facilitated, and thereby the original similar design method and the velocity coefficient method of the diagonal flow pump can be replaced to a great extent.

The invention provides a method for testing resonant frequency of a direct-drive plunger pump for a ship. The method for testing the resonant frequency of the direct-drive plunger pump for the ship aims at overcoming the defects of an existing method for testing the resonance frequency of the pump for the ship, and the requirements of scientific research and engineering design can be met through simple and convenient operation, convenient data output and wider applicability. The method for testing the resonance frequency of the direct-drive plunger pump for the ship includes the steps that firstly, a reasonable monitoring point arrangement scheme is determined, an external excitation mode is adopted for exciting a system, and vibration responses of key nodes of the system are tested by adopting an acceleration sensor; and then, vibration data of the direct-drive plunger pump are collected through a data acquisition system, data processing is carried out by utilizing a back-end server, and the resonant frequency of various orders of the direct-drive pump system is determined. In order to meet the requirements for design, safety, detection and the like of a large ship pump, developing and establishing the method for testing the resonant frequency which is simple and convenient in operation have important significance.