51results about How to "Improve pumping performance" patented technology

The invention relates to a method for producing an especially panel-shaped vacuum insulation element which is wrapped in a film and is filled with a powder. According to the method, the unmolded, loose powder is filled, particularly poured, into the opening of a bag which is formed from a high-barrier film and is open on one side. A filter material that is permeable to air and impermeable to powder dust is fixed to the internal face of the film bag in the area of the opening of the filled film bag such that the interior of the bag is closed in a dust-tight manner while air can still be discharged. The interior of the dust-tightly closed film bag is then evacuated and the evacuated film bag is air-tightly closed in a vacuum.

The high strength and light aggregate concrete features the preparation process including the step of pre-treatment of light aggregate and the step of preparing light aggregate concrete. The step of pre-treatment includes preparing pre-treated cement slurry with cement, superfine admixture, water soluble polyacrylic acid emulsion, water reducer FDN and water; and mixing light aggregate with the cement slurry via stirring for 1-3 min and curing at 85-95 % humidity and 17-23 deg.c temperature for 1-3 days. The step of preparing light aggregate concrete is mixing the pre-treated light aggregate, cement, fine aggregate, silica ash, water reducer FDN and water in certain proportion to obtain the product. The present invention can raise the strength of light aggregate, lower water absorption rate, increase the strength of light aggregate concrete and improve the pumping and construction performance of light aggregate concrete.

The invention provides a composite high-performance polycarboxylic acid water reducing agent and a preparation method and application thereof, and relates to the technical field of concrete. The composite high-performance polycarboxylic water reducing agent is prepared from the following raw materials in parts by weight: 15-20 parts of a water-reduced polycarboxylic acid water reducing agent mother liquor, 10-15 parts of a viscosity reduction polycarboxylic acid water reducing agent mother liquor, 20-30 parts of a slow-release polycarboxylic acid water reducing agent mother liquor, 10-15 partsof a hydration heat inhibitor, 2-5 parts of a retarder, 0-0.1 part of a consistency regulator, 0-0.06 part of an air entraining agent and 0-0.05 part of a defoamer. The composite high-performance polycarboxylic acid water reducing agent is applied to barite concrete, the fluidity, pumping performance and stability of the barite concrete can be effectively improved, the heat release rate of hydration is slowed down, and the wall is prevented from cracking.

The efficient set retarding water reducing and plasticity keeping agent for steel pipe concrete is water solution with solid content of 30-36 % compounding polycarboxylic acid water reducing agent 87-94.5 wt%, sodium gluconate 5-10 wt% and zinc sulfate 0.5-3 wt%. The efficient set retarding water reducing and plasticity keeping agent of the present invention has the advantages of low gas introducing amount, high water reducing rate and high plasticity keeping performance, and can raise the flowability and construction performance of newly stirred steel pipe concrete, lower the air content of concrete, improve the adhesion between steel pipe wall and concrete, raise the strength and durability of steel pipe concrete and raise the bearing capacity of the steel pipe concrete structure.

The invention discloses a silicate plugging agent for oil-well water plugging and an application method thereof, wherein the silicate plugging agent comprises the following components by weight percentage: 8-12% of general purpose portland cement, 1-3% of silica fume, 0.3-0.7% of water glass, 0.01-0.03% of sodium lignin sulfonate and the balance of water. The application method of the silicate plugging agent for oil-well water plugging comprises the following steps: in the stirring process, orderly adding the water glass, the sodium lignin sulfonate and the silica fume in a stirring pot with water proportionally, and stirring evenly to obtain a mixed solution; next, adding the general purpose portland cement to the mixed solution while stirring to form the base solution of the silicate plugging agent; and pouring the base solution of the silicate plugging agent into formation fractures. The silicate plugging agent provided by the invention has the advantages of high water cement ratio, good pumping performance, long initial setting time, high after-final-setting strength, good water scouring resistance, all of which are similar to the own physical properties of the formation; the silicate plugging agent is capable of achieving the construction requirements of oil-well water plugging; and the properties of the silicate plugging agent are suitable for nonhomogeneous fractured reservoirs.

The invention provides a plugging agent for a fractured-vuggy oil reservoir, comprising the following materials in percentage by weight: 5.24-9.36% of cement, 3.03-5.35% of micro-silicon, 4.01-5.43% of sodium bentonite, 0.52-0.55% of polymer dispersant, 0.17-0.40% of retarder, sodium carbonate aqueous solution with sodium carbonate accounting for 0.0008-0.0011%, and residual amount water, wherein the water cement ratio of the plugging agent is 4.07-6.28. When the plugging agent is used for the water plugging of the fractured-vuggy oil reservoir, the loss of the plugging agent caused by density is avoided, and the plugging agent can effectively reside and plug a water outlet passage; and the oil-water selectivity and the plugging agent strength in water plugging are high, and high-strength selective water plugging is realized.

The invention discloses an electrodeless lamp temperature control method and device. The method comprises the steps that mercury electrodeless lamps are connected with a high-frequency electromagneticcoil, and a circuit is connected to make the mercury electrodeless lamps work normally; different frequencies and powers are input to the mercury electrodeless lamps, and the cold-end temperatures corresponding to the mercury electrodeless lamps are measured respectively when the mercury electrodeless lamps work normally; the cold-end temperatures of the mercury electrodeless lamps are controlledwithin a preset threshold value range, the radiation intensity of the mercury electrodeless lamps within the temperature range is measured, and the optimal cold-end temperature is calculated when thehighest radiation intensity is reached. According to the method and device, by precisely measuring and controlling the cold-end temperatures of the mercury lamps, redundant mercury is stored at the cold ends, the temperature of the mercury electrodeless lamps is constant, the saturated vapor pressure in bulbs is stable, the temperature of the mercury electrodeless lamps is selected to the optimaltemperature, the radiation efficiency is greatly improved, and the pumping capability of the high-frequency electrodeless mercury lamps and the mercury ion microwave frequency marker performance areimproved.

The invention relates to a wave-shaped lip oil seal with backflow stripes at a lip opening and a three-dimensional modeling method. Inclined outwards convex backflow stripes are arranged at the lip opening part of the wave-shaped lip oil seal; the oil seal integrates the advantages of the wave-shaped lip oil seal and the backflow stripe oil seal; specific good dynamic pressure performance of the wave-shaped lip oil seal is realized; the characteristic of good oil pumping effect of the backflow stripe oil seal is reserved; the problem of poor abrasion resistance of the lip opening of the wave-shaped lip oil seal is also solved. The oil seal three-dimensional modeling method based on a circumferential uncoiling conversion principle provided by the invention has the advantages that the wave-shaped lip oil seal precise three-dimensional solid modeling problem difficult to be completed by the existing CAD (computer-aided design) software is changed into a relatively simple half three-dimensional oil seal solid model modeling problem capable of being easily realized by the existing CAD software; conditions are provided for the design manufacturing and the simulation analysis of the wave-shaped lip oil seal; wide application values are realized.

The invention provides a pump body assembly and a compressor. The pump body assembly comprises a pump body structure and an oil absorbing structure; the pump body structure comprises a compressing assembly suitable for compressing fluid and a crankshaft connected with the compressing assembly; the end, connected with the compressing assembly, of the crankshaft is an oil inflow end; the end face ofthe oil inflow end extends into the crankshaft to be provided with an oil inflow hole; the oil absorbing structure is arranged on the pump body structure, and comprises an oil absorbing body formingan oil absorbing cavity; one end of the oil absorbing cavity communicates with the oil inflow hole, and the other end extends in the direction away from the oil inflow hole; and the cross section areaof at least one position of the oil absorbing cavity is larger than that of the oil inflow hole. Due to the pump body assembly, when the pump body assembly performs oil pumping, oil firstly enters the oil absorbing cavity and passes through the position, with the cross section area larger than that of the oil inflow hole, of the oil absorbing cavity, disturbance generated during oil pumping can be relieved, vertexes formed nearby the oil inflow end are reduced, and a good oil pumping effect is achieved.

A vacuum pump comprises a first pumping section (106), and, downstream therefrom, a second pumping section (108), The pump comprises a first pump inlet (120) through which fluid can enter the pump and pass through both the first and second pumping sections towards a pump outlet, and a second pump inlet (122) through which fluid can enter the pump and pass through only the second pumping section towards the outlet. The second pumping section (108) comprises an externally threaded rotor (109).

The invention discloses a compressor. The compressor comprises a housing, a motor, a crankshaft and an oil pump assembly, wherein oil liquid is stored at bottom in the housing; the motor is arranged in the housing and located above the liquid level of the oil liquid; the crankshaft is connected with the rotor of the motor, can rotate relative to the housing, and is provided with an oil path; the oil pump assembly comprises a fixed part connected with the stator of the motor and a movable part connected with the crankshaft; an oil absorption oil channel is defined between the fixed part and the movable part; one end of the oil absorption oil channel extends to the oil path; and the other end of the oil absorption oil channel extends into the oil liquid to pump the oil liquid into the oil path. According to the compressor disclosed by the embodiment of the invention, the structure is simple; the oil liquid can be pumped into the oil path of the crankshaft through the oil absorption oil channel between the fixed part and the movable part; the oil pumping capability is sufficient, and all parts of the compressor can be well lubricated, so that the normal operation of the compressor is guaranteed; the manufacturing and production cost is low; the reliability of the oil pump assembly is high; and working properties of the compressor are improved.

The invention discloses a pulsation vacuum sterilizer and a vacuum circulating system thereof. The vacuum circulating system comprises a sterilization chamber a well as a water tank, a steam generatorand a steam ejector which are connected end to end to form a closed-loop chain; the steam ejector comprises a steam inlet, a steam outlet and an evacuation port; the steam inlet and an inlet of the sterilization chamber both communicate with an outlet of the steam generator, the steam outlet communicates with a water inlet of the water tank, and the vacuumizing port communicates with a sterilization cavity of the sterilization chamber; and a heat exchanger used for achieving steam condensation is connected between the steam outlet and the water tank. According to the vacuum circulating system, the steam generator is used for providing steam for the sterilization cavity for high-temperature sterilization; the vacuumizing operation of the sterilization cavity is realized by utilizing the vacuumizing port; and at the same time, steam and water achieve working medium recovery in the closed-loop chain structure formed by the water tank, the steam generator and the steam ejector, and suitability for long-term operation of the pulsation vacuum sterilizer is achieved.

The invention relates to the technical field of lithium ion batteries, provides a lithium ion battery composite PET adhesive tape, and aims to solve the problems that a traditional lithium ion batteryPET adhesive tape is loose in packaging structure, the pasting position hinders direct and effective infiltration of an electrolytic solution, the adhesive tape still needs to be removed when a battery cell is disassembled, and resource waste is caused by discarding. The lithium ion battery composite PET adhesive tape comprises a base material layer, and a bonding layer and a thermoplastic layerwhich are coated on the two sides of the base material layer. According to the invention, the advantages and characteristics of the original PET adhesive tape are retained, the heat sealing characteristic is also realized, the residual space in the battery cell is reduced, and the structure is more compact; the vacuum liquid injection effect, the electrolytic solution infiltration effect and the evacuation effect of the battery core are promoted; and the cycle performance of the battery core is improved, so that the performance of the lithium-ion battery is improved.

The invention relates to a method for operating a water-carrying household appliance 1 with a lye container 2, a drum 3 for accommodating laundry items 4, a drive motor 5 for the drum, a speed-controlled pump 18 which is connected to the lye container 2 via a lye channel 23, Wherein a rotational speed np of the speed-controlled pump 18 is varied as a function of the density p of the conveying medium. (DE). The invention also relates to a water-conducting household appliance 1 suitable for carrying out the method.

In a gear pump, a gear chamber is defined in a housing hole of a housing. A pair of gears is housed in the gear chamber. The gears are rotatably supported at support holes of a pair of side plates via support shafts. As viewed in an axial direction of the support shafts during rotation of the gears, addendum circles of the gears displaced under a differential pressure between a low-pressure chamber and a high-pressure chamber form first contact points with respect to an inner peripheral surface that defines a housing hole. As viewed in the axial direction of the support shafts during rotation of the gears, the first contact points are covered with the side plates displaced under the differential pressure.

The invention provides an engine balance shaft assembly and an engine. The engine balance shaft assembly comprises a shell with a first cavity and two balance shafts which are arranged in parallel androtatably supported on the shell, the two balance shafts are provided with power input ends extending into the first cavity, the engine balance shaft assembly comprises two gears, the two gears correspondingly sleeve the power input ends of the two balance shafts and are meshed with each other, and the meshing rotation of the two gears in the first cavity can form oil pumping of engine oil from an engine oil collecting device to an oil duct of an engine cylinder body. According to the engine balance shaft assembly, the oil pump is formed by linkage gears on the two balance shafts, an independent oil pump is omitted, the structure of a crankshaft in an engine can be simplified, arrangement of the engine is facilitated, and cost can be reduced.