39results about How to "Reduce shear resistance" patented technology

A scroll compressor equipped with: a stationary scroll (112); a rotating scroll (109); a crankshaft (103) at the end of which is an eccentric part (108); an oil supply hole (115) that penetrates the interior of the crankshaft in the axial direction and has an aperture part at the end face of the eccentric part; a rotating sliding bearing (110) that is provided on the rotating scroll, and engages the eccentric part and slides; and an oil supply passage (116) provided at the outer circumference of the eccentric part. The scroll compressor is constructed such that the interval between the eccentric part and the rotating sliding bearing is lubricated by means of lubricating oil supplied from the oil supply hole. A loss reduction groove (117) is provided separately from the oil supply passage at the outer circumference of the eccentric part in the axial direction, and seal parts (118a, 118b) are provided on the eccentric part end-face side and/or the eccentric part base side of this loss reduction groove. Thus, the shear resistance of the oil film due to the lubricating oil present between the outer circumferential surface of the eccentric part of the crankshaft and the inner circumferential surface of the rotating sliding bearing can be reduced, and bearing loss during fluid lubrication can be reduced.

A high temperature sliding alloy has a matrix 1 of a Ni-base alloy or a heat resistant Fe-base alloy, and contains, by mass, 1 to 35% hard particles consisting of a Co-base intermetallic compound dispersed therein, wherein 0.1 to 10% Ag is dispersed in the matrix. Ag is a soft metal, forms an ultrathin film on a sliding surface caused by sliding with a mating member, and presents a lubricating effect. When Ag forms the ultrafine film and spreads on the sliding surface, it works little as a frictional force against the mating member due to its low shear resistance, and accordingly can achieve a low coefficient of friction.

The invention relates to an energy-efficient transmission mechanism of a transverse cutting machine. The energy-efficient transmission mechanism is characterized in that an upper knife roll and a lower knife roll are connected with a left gearbox rack and a right gearbox rack through inner bearing blocks and outer bearing blocks, upper knife roll gears are arranged at the two ends of the upper knife roll respectively, and lower knife roll gears are arranged at the two ends of the lower knife roll respectively. A driving motor is connected with an input gear shaft through two diaphragm couplings. The input gear shaft is sleeved with an eccentric bearing sleeve. An input gear of the input gear shaft is meshed with a big gear of a two-stage transmission gear set. A pinion of the two-stage transmission gear set is meshed with the corresponding lower knife roll gear. The lower knife roll gears are meshed with the corresponding upper knife roll gears. A self-aligning roller bearing is arranged in each inner bearing block, and a deep groove ball bearing is arranged in each outer bearing block. The energy-efficient transmission mechanism has the advantages of being large in reduction ratio and efficient and saving energy.

The invention discloses a separating type shearing knife, and belongs to the technical field of metal cutting. A groove 7 is formed in the front surface of a knife rest, and a threaded hole is formed in the groove; an upper blade consists of 5-10 blade units, each blade unit is fixedly connected to the threaded hole in the groove through a bolt, and the 5-10 blade units are transversely and tightly arranged in the groove; a lower blade is fixedly connected to a front upper corner of the base; and a distance h12 between a perpendicular cutting edge of the lower blade and the back surface of the cutting edge of each blade unit is 2-4mm. According to the separating type shearing knife disclosed by the invention, the tip parts of the blade units are manufactured to be triangular, and the knife tips can effectively increase shearing penetrating capacity, so that the shearing resistance is reduced, and the efficiency is improved; meanwhile, each position of the knife body during shearing is different in stress impact, so that the invalid blade unit can be independently replaced when local blade unit is invalid, and therefore, the cost is reduced; and meanwhile, the combined type upper blade carries out transverse shearing motion, so that the roughness of a sheared surface of a sheared material is reduced, and processing precision is improved.

The invention belongs to the technical field of fine crushing, and in particular, discloses a shearing crusher cutter and a crushing shaft device of a shearing crusher applying the cutter. The cutter comprises a cutter body, and a cutter shaft mounting hole formed in the center of the cutter body; and multiple main edges are arranged at the outer periphery of the cutter body, and are uniformly distributed on the outer peripheral edge of the cutter body with the cutter shaft mounting hole as the circle center. The cutter further comprises multiple sets of secondary edges; each set of secondary edges is arranged between two adjacent main edges; and the distances from the main edges to the cutter shaft mounting hole are larger than the distances from the secondary edges to the cutter shaft mounting hole. The crushing shaft device comprises a cutter shaft, and cutters mounted on the cutter shaft; at least two cutters are provided; and spacing sleeves are arranged between the cutter shaft and the cutters. The cutter can fully crush materials to be crushed to improve the crushing efficiency, and relatively prolongs the service life of a crushing shaft and a motor.

The invention provides a pulpy metakaolin-base concrete admixture and a preparation method of the admixture. The admixture comprises a dry base, a composite dispersant and water, wherein the dry base consists of 30-90% by mass percentage of metakaolin and 10-70% by mass percentage of fly ash sinking beads; a mass ratio of the water to the dry base is (30-180):100; the composite dispersant consists of hydroxyethyl cellulose and a naphthalene water reducing agent; the hydroxyethyl cellulose accounts for 0.005-2.0% of the mass of the dry base; the naphthalene water reducing agent accounts for 0.001-1.0% of the mass of the dry base. The admixture reduces an adverse effect of the metakaolin on the working performance of concrete by utilizing combined action of the metakaolin, the fly ash sinking beads and the dispersant, and significantly improves the strength uniformity, the dispersity and the stability of a test block.

A multi-layer film structure including two outermost film layers each comprising a polyethylene blend and an inorganic filler and at least three film layers disposed between the two outermost film layers, each of the at least three film layers comprising at least one of a polyethylene blend, a mono-component polyethylene and an inorganic filler.

The invention relates to a preparation method of high-grade road emulsified asphalt. The method adopts the technical scheme that the method comprises the steps: catalytic cracking heavy residual oil is heated to be 120-160 DEG C in a heating furnace and then fed into a stirring kettle; a diluent, namely acetone or tetrahydrofuran is added according to the fact that the ratio of the catalytic cracking heavy residual oil to the diluent is (2.5-3):100; the catalytic cracking heavy residual oil is diluted to be low-viscosity residual oil; the reaction viscosity is reduced; an emulsifier, a stabilizer, an antifreezing agent, a surfactant, the low-viscosity residual oil and water are fed into a colloid mill at a ratio; the temperature of the colloid mill is kept to be 75-90 DEG C; the high-grade road emulsified asphalt is prepared via the colloid mill. The method has the benefits that the diluent dilutes the heavy residual oil, so that the viscosity of the residual oil is reduced, the shear resistance in an emulsion process is reduced, and the reaction efficiency is improved; by virtue of the antifreezing agent, the freezing resistance is good, the long-term storage property is good, the oversize residual amount of the asphalt is less, and a pungent smell generated due to heating and volatilization of alcohol soap lye preparation process and an emulsified asphalt production process during single alcohol use; the surfactant increases a softening point of an emulsified asphalt product.

The present invention is directed to a multilayer pressure sensitive adhesive (PSA) film, having a first pressure sensitive adhesive layer and at least one opposing layer, characterized in that the first pressure sensitive adhesive layer comprises a pressure-sensitive adhesive composition comprising (co)polymers of: a) (meth)acrylate ester of 2-alkyl alkanols wherein the molar carbon number average of said 2-alkyl alkanols is 12 to 32; and optionally b) (meth)acrylate esters of C_1-12 alkanols; wherein the molar carbon number average of the alkanols of the a) and b) (meth)acrylic acid esters is 12 to 32; wherein the at least one opposing layer comprises at least one filler material selected from the group of filler particles, wherein the filler particles are expanded perlite. The invention is also directed to a method for the manufacturing of such a multilayer PSA film and its use.

The invention relates to a sheet metal part with a connector portion oriented along a connector direction, and a connection tab, the connection tab being connected to the connector portionand having a connection cross-section area oriented essentially perpendicular to the connector direction. The invention further relates to a method of producing a sheet metal part with improved connection tab geometry. Sheet metal parts of the prior art and method for producing said sheet metal parts have the disadvantage that the shear resistance of the connection tab, which is connecting the sheet metal part with a carrier-strip, increases with the sheet metal thickness, which in turn demands for more robust, that is thicker, upper shear arms. The invention solves these problems by providing at least one weakened zone in the connection tab, in which the shear resistance of the connection tab is reduced compared to an unprocessed connection tab of the same construction type and size, and by providing a method for producing said weakened zone or zones in the connection tab.

The invention discloses an abrasion resisting lubricant, comprising 75-90 parts of base lubricant, 3-6 parts of viscosity improver, 3-6 parts of pour point depressant and 5-15 parts of nano boron silicide. Nano boron silicide abrasion resisting agent is added in the abrasion resisting lubricant of the invention, the nano boron silicide abrasion resisting agent is a novel high temperature resistinglubricant material with a layered structure, and has a hexagonal crystal system layered structure similar to silicon; boron and silicon between every two layers are overlapped in a stagger way, the shear resistance of sliding along inter-layer is small, thus being easy to slide; the invention has excellent lubricating property, can obviously reduce abrasion of an engine, increase power of the engine, prolong the service life of engine oil and save fuel oil.

The invention relates to a production method of a non-autoclaved PHC (prestressed high-intensity concrete) pipe pile with good distribution convenience. The production method is characterized in that a slow-release water reducer is used to prepare non-autoclave concrete, distribution of the pipe pile concrete is finished before the slow-release water reducer plays its role in water reducing, centrifuging phase is entered via mold assembly and tensioning, a slow-release admixture then acts, mobility of the concrete increases gradually during centrifuging to arrive at centrifugal formation, and standing, steam-curing and demolding are performed to finish the production of the non-autoclaved PHC pipe pile. The production method has the advantages that the pipe pile concrete is of wet disperse granulate form during distribution, the problem is solved that distribution is difficult for the non-autoclaved pipe pile concrete due to excessively high viscosity, and the production method is particularly suitable for the production of thin-walled pipe piles.

The invention provides a laser rapid prototyping method and device easy for solid separation, and belongs to the technical field of laser rapid prototyping. According to the laser rapid prototyping method easy for solid separation, an isolation layer is arranged between a powder laying substrate and a processed solid by changing the processing parameters and the scanning angle of a laser scanning assembly; the characteristics of low static strength and low shearing resistance of the isolating layer are utilized to easily separate the manufactured entity from the powder laying substrate, so that the appearance structure of the processed entity is prevented from being damaged in the separation process; according to the laser rapid prototyping device easy for solid separation, all-directional closed transfer of powder between the powder feeding cylinder and the prototyping cylinder can be realized, so that powder waste is avoided.