133results about How to "Increase bearing pressure" patented technology

Provided is an oiling nozzle for a thrust bearing, capable of improving the following capability of pads, and achieving a higher bearing pressure of the thrust bearing. An oiling nozzle which is for use in a thrust bearing and is respectively arranged between pads disposed in positions facing the thrust surface of a thrust collar that protrudes radially outward from a rotor shaft, along the circumferential direction, wherein the oiling nozzle comprises: a cylindrical stem; and a rectangular-shaped mainframe whose heightwise middle portions of opposite lateral sides are provided with convex parts each presenting a semicircular disk shape in a plane view, to be fitted into concave parts that are formed in lateral sides of the pads, and whose top portion located on the side opposite to the stem is formed with a plurality of nozzle holes for ejecting lubricating oil that has been supplied from the bottom of the stem toward a space between the thrust collar and the pads.

A method for preparing the composite steel-plastics pipe with two polymer layers includes such steps as providing steel plate or steel band with holes, longitudinal curving or spiral rolling, welding to become a cylindrical metal skeleton, using an extruder to extrude out the fused polymer and make it to pass through the holes for wrapping the metal skeleton to form pipe wall, using another extruder to extrude out the fused polymer but make it not to pass through holes to form a polymer layer on formed pipe wall, and cooling. Its apparatus is also disclosed.

An improved jack up vessel includes a hull, a plurality of legs, each leg having a pad, and a jacking mechanism for moving the hull upward and downward. Each leg is a generally triangular leg that is a closed wall, buoyant structure.

A tube network is composed of the plastic tubers whose end has a conic receipting recess and the composite metal-plastics tubes consisting of a central metallic skeleton layer, an internal plastic layer and an external plastic layer and with conic ends matched with the conic recess at the end of plastic tube. Both tubes are joined through insertion and thermal fusion.

A tapered roller bearing according to the invention is such that when an arithmetical mean roughness as a surface roughness of a large end face of a tapered roller is σ1 and an arithmetical mean roughness as a surface roughness of a large rib surface of an inner ring is σ2, σ1 is 0.04 μm or larger, and a composite roughness that is expressed by a square root of a sum of a squared value of σ1 and a squared value of σ2 is 0.17 μm or smaller. Raceway surfaces of an outer ring and the inner ring and a rolling contact surface of the tapered roller are crowned, and a total crowning amount is set to 50 μm or larger, an outer ring crowning rate is set to 40% or larger, and a roller crowning rate is set to 20% or smaller.

The invention relates to a pressure-bearing lost circulation additive for a drilling fluid and for stably bearing pressure on a smooth fracture leakage wall surface. The lost circulation additive is composed of 10%-20% of damping material, 45%-50% of bridging material and 35%-40% of filling material by weight, wherein the damping material is an industrial metal screen, having the size of the damping material is 1.0*1.0mm to 3.0*3.0 mm and the thickness of the damping material is about 0.5 mm; the bridging material is calcium carbonate particles, and the standard mesh number of the screening mesh product of the bridging material is lower than 20 meshes; the filling material is a mixture composed of calcium carbonate powder and flexible graphite powder; the calcium carbonate powder is further divided into three grades to realize multi-grade filling and to form a compact shielding layer; and the mesh number of the flexible graphite is greater than 150, and the anti-pressure ability of a bridge plug section is improved. With the pressure-bearing lost circulation additive for the drilling fluid and for stably bearing pressure on the smooth fracture leakage wall surface disclosed by the invention, leak stoppage success rate and bearing pressure for smooth fracture leakage can be improved, leakage stoppage failure due to complexity is reduced, the benefits of exploring and developing a bored well are improved; and the preparation process of the lost circulation additive is simple and convenient, the source of the materials of the lost circulation additive is broad, and the lost circulation additive is easy to spread and apply.

The tensioning mechanism (18) comprises a clamp bolt (28), arranged in a displaceable manner in a transverse bore (26) in the fitting plug (12) and two diametrically opposed retainers (34, 36) in the second component (14) which engage with an axially facing internal or external cone against a complementary internal or external cone on the clamp bolt (28) and, during tensioning, are tensioned with the same in a wedge fashion. According to the invention, the clamp bolt (28) comprises a frustum-shaped external cone (40), the base diameter of which is smaller than the diameter of the guide surface (62) thereof in the transverse bore (26).

The invention relates to a multi-channel jet vacuum pump, and belongs to the technical field of injection pumps pumping fluid through the inertia of the fluid to be pumped. The multi-channel jet vacuum pump comprises a submersible pump, a jet device and a vacuum tank. The jet device comprises a jet box with an outlet. A left clamping plate and a right clamping plate attached to the left clamping plate are arranged in the jet box. A jet liquid inlet pipe which penetrates through the left clamping plate and is perpendicular to the left clamping plate is arranged in the center of the left clamping plate, and the inlet end of the jet liquid inlet pipe is communicated with the outlet of the submersible pump. A plurality of jet nozzles communicated with the jet liquid inlet pipe are arranged between the left clamping plate and the right clamping plate and uniformly distributed in the circumferential direction of the center of the jet liquid inlet pipe. The diameter of each jet nozzle is 8-20 mm. The outlet end of each jet nozzle is opposite to the outlet of the jet box. An air inlet pipe communicated with each jet nozzle is arranged on the edge of the right clamping plate and communicated with the outlet of the vacuum tank. The multi-channel jet vacuum pump has the advantages that the bearing pressure is large and the cleaning performance is good.

The invention discloses a forging method capable of realizing multi-surface forging forming. According to the forging method, a fixed sleeve is fixedly installed in a circular groove, the surface of the fixed sleeve is sleeved with a reset spring, the top end of the reset spring is fixedly connected with a lifting plate, and movable columns are fixedly connected to the four corners of the bottom end of the lifting plate correspondingly; and conical discharging holes are formed in the middle of the lifting plate at equal intervals, cross beams are symmetrically and fixedly installed at the topend of an oxidation slag collecting box body, and conical clamping blocks are fixedly connected to the top ends of the cross beams at equal intervals. Through cooperative use of the reset spring and the conical discharging holes, oxidation residues generated by forging can fall down when the lifting plate is jacked up, the situation that oxidation residues are accumulated on the surface of the lifting plate to affect the normal forging process, a raw material is forged on the accumulated residues, pits are formed in the surface of the raw material, and the surface of the raw material is uneven, so that the forging quality of a subsequent raw material is reduced is avoided, the surface of a machining platform can be kept clean without manual cleaning, and the qualified rate of forging is increased.

The invention provide a three-branch single-cylinder hydraulic bidirectional expanding-extrusion device, which comprises upper expanding-extrusion arms, lower broken-end expanding-extrusion arms, support arms, a piston rod, a fixed disk, a moving disk and a cylinder block. The three-branch single-cylinder hydraulic bidirectional expanding-extrusion device is characterized in that in rotation of the three-branch single-cylinder hydraulic bidirectional expanding-extrusion device, a soil layer is cut by cutting edges of the upper expanding-extrusion arms to form a cavity, and the lower wall of a bearing disk cavity is rolled by the lower broken-end expanding-extrusion arms to compact the soil layer; when the cavity is formed, the three-branch single-cylinder hydraulic bidirectional expanding-extrusion device rotates reversely; and the upper wall of the bearing disk cavity is squeezed by arc slants of the upper expanding-extrusion arms to compact the soil layer, and the lower broken-end expanding-extrusion arms scrape fallen residue and rotate reversely to roll the lower wall of the bearing disk cavity for the second time so as to compact the soil layer. Compared with the prior art, the three-branch single-cylinder hydraulic bidirectional expanding-extrusion device has the evident advantages that expanding-extrusion is separately performed, quick, laborsaving and reliably effective, the shape of the formed cavity more meets the load bearing requirement, and the like, and accordingly is well worthy of popularization and application.

The invention relates to a petroleum drilling and cementing tool, in particular to a drilling liner cementing rubber plug composite colliding device. A drilling rod rubber plug of the device comprises a fixed nut, a connecting rod, a small rubber bowl and a bowl seat, the fixed nut, the connecting rod, the bowl seat and a guiding head are sequentially in threaded connection from top to bottom, the small rubber bowl is sleeved outside the connecting rod, a clamping block is installed on the outside of the bowl seat, and a back-moving spring is installed on the inside of the clamping block. A tail pipe tubular rubber plug comprises a tubular connector, a big rubber bowl and a tubular guiding bowl seat, the tubular connector is designed to be hollow, a clamping block groove matched with the clamping block is designed on the inner wall of the tubular connector, the lower end of the tubular connector is in threaded connection with the tubular guiding bowl seat, and the big rubber bowl is sleeved outside the tubular connector. The drilling liner cementing rubber plug composite colliding device is high in carrying power, reliable in fixation, simple in structure and convenient to use, and solves the problem that the existing well cementation rubber plug is low in carrying power, not safe in use and apt to cause cement inverse returning, low returning outside a pipe, and cement plug leaving in the pipe and the like.

The invention discloses a wood plastic composite board formula used for wardrobe. The wood plastic composite board comprises the following raw materials with percentage in total mass percentage: 45-52% of polyvinyl chloride powder, 21-28% of wood powder, 6-8% of glass fiber, 2-4% of carbon fiber, 2.5% of an antistatic agent, 2% of a fire retardant, 2.5% of an anti-aging agent, 1.5% of a sign printing adhesion agent, 4% of a foaming agent, 1% of a lubricant, 0.5% of a foaming conditioning agent, and 3% of light calcium carbonate. The wood plastic composite board overcomes difficulty of fusion of timber and plastic, the wood plastic composite board solves the disadvantages of steel, timber and plastic, has the advantage of low cost, and is benefit to environment protection, and the prepared wardrobe has the advantages of light weight, high intensity, and strong bearing force.

The invention discloses a preparation method of a polyether hydrotalcite mixed solution with an ultra-low friction coefficient (less than 0.01), and belongs to the field of lubricating materials. Thesurface of an ultrathin nano hydrotalcite sheet prepared by adopting a hydrothermal method is provided with hydrophilic groups, and the ultrathin nano hydrotalcite sheet is uniformly dispersed in water according to the ratio of 0.5-2%, so that an uniform and translucent colloidal solution can be prepared, and then the uniform and translucent colloidal solution is mixed with a polyether lubricatingfluid at a ratio of 20-50%. The longitudinal dimension of the ultrathin nano hydrotalcite sheet in the polyether hydrotalcite mixed solution is very small compared with the thickness of a lubricatingfilm, and the surface of a friction pair can be flattened and polished in the running-in stage by addition of the hydrotalcite sample, so that the running-in process can be quickly completed, and bycombined with a polyether water solution, the ultralow friction coefficient is realized, and the final bearing capacity is improved.

The invention relates to a pneumatic control valve which comprises a valve body and a valve element arranged in the inner cavity of the valve body. The valve body comprises a shell body, an upper tubular inner cavity, an elliptic inner cavity, a lower tubular inner cavity and an air inlet, the upper tubular inner cavity, the elliptic inner cavity and the lower tubular inner cavity are arranged in sequence and are communicated in sequence, the air inlet is formed in the shell body, the air inlet is formed in the cavity wall of the elliptic inner cavity, and the valve element is provided with a middle through hole, a wear-resisting rubber layer and a tyre fabric reinforcement layer from inside to outside in sequence. The pneumatic control valve is good in sealing effect, the wear resistance of the valve element is good, the service life is long, and bearing pressure is high. The problem that the pneumatic control valve is poor in sealing or the valve element is easy to pull out is solved, the structure is simplified, and processing difficulty is lowered. The problems that an existing pneumatic control valve element is not resistant to wear and bearing pressure is low are solved.

The invention discloses a machining device for a high-precision servo motor brake disc. The device comprises a support frame and a data management module, wherein the data management module comprises a data detection module and a data processing module; the data detection module is used for detecting the real-time state of the device during operation, and transmitting data information to the data processing module; the data processing module is used for processing the received data information and controlling the device according to the processing result; a fixing plate is fixedly installed on the support frame; a limiting groove is formed in the center of the fixing plate, an elastic limiting piece is fixedly installed at the top of the limiting groove, and a fixed baffle is arranged at the bottom of the limiting groove; sliding rails are arranged at the two sides of the support frame; sliding blocks are connected to the tops of the sliding rails in a sliding manner; and rotary connecting rods are connected to the tops of the sliding blocks through bearings. The machining device has the characteristics that the brake disc is protected and the machining efficiency is improved.

The invention relates to an expansion packer rubber barrel. The expansion packer rubber barrel comprises a rubber barrel body (1), metal connecting pipes (2) and annular rings (3), wherein the two ends of the rubber barrel body (1) are fixed to the metal connecting pipes (2) through heat vulcanization technology glue, the two ends of the rubber barrel body (1) are fastened through the annular rings (3), and carbon fiber cord fabric (4) is buried in the rubber barrel body (1). The carbon fiber cord fabric high in tensile strength is buried in the rubber barrel body and is very popular and catches close attention because of having the advantages of being soft in texture, resistant to corrosion, very thin in sheet material, high in tensile strength and the like. Compared with an existing method that steel wires are buried in the rubber barrel body, the bearing capacity and expansion amount of the rubber barrel are greatly improved, the service life of the rubber barrel at high temperature is greatly prolonged, the phenomenon that because the steel wires are high in to rigidity, the components are damaged easily is avoided, and the expansion packer rubber barrel is simple in machining technology and easy to popularize and apply.

The invention discloses a solar energy heat collecting tube comprising two aluminum strips an aluminum tube and a copper tube, wherein the aluminum tube is arranged between the two aluminum strips and compounded with the two aluminum strips into a whole, the copper tube is penetrated in the aluminum tube, and the outer wall of the copper tube is in contact with the inner wall of the aluminum tube. A runner of the solar energy heat collecting tube provided by the invention has three layers of walls, and copper is not stretched by a roller, therefore, the heat collecting tube has high bearing capacity and good freezing prevention performance and can be used under a low-temperature environment; and the copper tube is not stretched by the roller, therefore, the thickness of the copper tube is not reduced, and the service life of a product is greatly prolonged; in addition, two ends of the copper tube extend out of the aluminum tube, and during use, the copper tube is directly connected with the heat collecting tube, therefore, fewer soldering points exist, and less influence to the bearing capacity of the heat collecting tube is caused. Meanwhile, the invention discloses a production method of the solar energy heat collecting tube.

The invention relates to a self-bearing type grass brick house and a construction process thereof. The construction process comprises the following steps of crossly stacking grass bricks to form a grass brick wall; continuously arranging press plates on the top of the grass brick wall in the extending direction of the wall; pressing and connecting at least two ends of the press plates with the bottom of the grass brick house through linear connecting parts, wherein the linear connecting parts can provide the pre-pressing force for the grass brick wall, and the pre-pressing force is greater than the maximum bearing pressure of the house; finally, arranging hard decoration surfaces at the two sides of the grass brick wall. The self-bearing type grass brick house and the construction process have the advantages that as the integral density of the grass brick wall manufactured by the construction process is improved, and the bearing pressure is improved, when the pre-pressing force is greater than the maximum bearing pressure of the house, the grass bricks can bear the high loads; the deformation of the grass bricks is avoided in the building process, so when the non-deformable hard materials, such as cement and limestone, are arranged at the two sides of the grass brick wall, the cracking along with the deformation of the grass brick wall is avoided.