57results about How to "Improve friction and wear" patented technology

A laying pipe for use in the laying head of a rolling mill is configured for rotation about an axis, with an entry end aligned on that axis to receive a hot rolled product, and with a curved section leading to a delivery end spaced radially from that axis. The curved section defines a guide path configured to form the hot rolled product into a helical formation of rings. The laying pipe comprises a tubular ferrous wall having an interior surface comprising a wear resistant boronized layer against which the hot rolled product is confined for movement along the guide path.

The invention discloses a water lubrication rubber alloy bearing, which comprises a water lubrication rubber alloy bushing and a bearing outer ring. The water lubrication rubber alloy bushing is bonded on the inner circumference of the bearing outer ring through die stamping and vulcanizing, the corresponding coincidence relation is adopted for the radial thickness m of the water lubrication rubber alloy bushing according to the difference of the internal diameter d of the water lubrication rubber alloy bushing. The affect of the radial thickness of the water lubrication rubber inner liner tothe bearing capacity and the shock resistant capability of the bearing is comprehensively considered in the water lubrication rubber alloy bearing, the corresponding thickness of the water lubrication rubber inner liner is adopted according to bearings with different specifications, the bearing capacity of the bearing is obviously enhanced, the properties of surface deformation compatibility and elastic fluid dynamic pressure lubrication and the good silt, sand and impurities drainage capacity are strengthened, the service life of the water lubrication rubber alloy bearing is more than three times the similar bearing, the water lubrication rubber alloy bearing has the advantages of vibration damping, noise reduction, abrasion resistance, reliability, high efficiency, energy conservation and environmental friendliness and can be widely applied to the fields of the engineering equipments of machinery, marine vessel, petroleum, chemical industry, mine, water conservancy, agriculture and national defense.

A low-wear brush type seal comprises a front baffle, a rear baffle and a brush wire bundle. The root portion of the brush wire bundle is clamped by the front baffle and the rear baffle, the brush wire bundle is blown down and is in contact with a rotor under upstream pressure, brush wires of a brush wire area are not flush in the radial direction of the rotor, and the lengths of the brush wires of the downstream of the brush wire bundle are smaller than those of the brush wires on the upstream, namely seen from the axial-radial plane of the rotor 5, the downstream free end of the brush wire bundle 3 exists; initial gaps between the downstream brush wires and the rotor 5 are larger than those between the upstream brush wires and the rotor 5, notches can specifically reduce wear friction between the brush wire bundle 3 and the rotor 5, and the downstream brush wires can still be blown off under pressure differences and make slight contact with the rotor or maintain a small gap with the rotor, so that leakage amount is not increased obviously. According to the low-wear brush type seal, contact force between the downstream brush wires and the rotor is specifically reduced, and wear between the brush wires and the rotor is greatly reduced.

The invention discloses a copper-based powder metallurgy plunger pump oil distribution disc material and a preparation method thereof. The preparation method comprises the steps that 2%-4% of nickel,8.0%-12.0% of tin, 3%-5% of lead, 0.4%-0.65% of binder, 0.4%-0.6% of lubricant and the balance copper powder are obtained according to the weight ratio and mixed to obtain copper-based mixed powder; and then compression molding, sintering, shaping, distressing and machining are sequentially carried out to obtain a finished product. The metallographic structure of the material prepared through themethod is mainly a high-temperature equiaxed single-phase structure, a copper-tin compound and elemental lead are distributed at a grain boundary, the copper-tin compound can improve the strength andhardness of the material and play a role in abrasion resistance, and the elemental lead plays a role in abrasion reduction, so that a very good using effect is achieved; the material prepared throughthe method has better tribological characteristics and better fatigue wear resistance and adhesive wear resistance; and the preparation method is simple in process, high in production efficiency and low in processing cost.

The invention relates to a high-frequency direct-current heating auxiliary rolling device added on a machine tool. The high-frequency direct-current heating auxiliary rolling device comprises a rolling device, a heating component and a loading component; the rolling device is fixedly mounted on a cutter frame of the machine tool; and a rolling head is towards parts to be machined. The heating component comprises a high-frequency direct-current power supply, two copper electrodes and two electric brushes; and the high-frequency direct-current power supply, the two electric brushes, the two copper electrodes and the parts to be machined are connected through leads to form a closed loop. The loading component comprises an electric brush frame, two insulation fixed thimbles and an insulation revolving thimble; and in the horizontal direction of the machine tool, a machine tool tail base, the insulation revolving thimble, the first insulation fixed thimble, the first copper electrode, the parts to be machined, the second copper electrode, the second insulation fixed thimble and a power tool power chuck are coaxially clamped in sequence. The invention further relates to a machining method of the high-frequency direct-current heating auxiliary rolling device. The device is simple in structure, convenient to operate and high in practicability, and belongs to the field of metal machining equipment.

The invention discloses a tung oil modified phenolic resin automobile brake block, which comprises the following ingredients in parts by weight: 12 to 14 parts of tung oil modified phenolic resin, 5 to 6 parts of steel fiber, 5 to 6 parts of glass fiber, 5 to 6 parts of carbon fiber, 7 to 10 parts of aromatic poly amide fiber, 2 to 3 parts of copper fiber, 5 to 6 parts of wollastonite, 5 to 10 parts of expanded vermiculite, 4 to 10 parts of mica powder, 5 to 8 parts of titanium oxide, 30 to 35 parts of barite, 8 to 12 parts of molybdenum disulfide, 10 to 13 parts of porous ceramic balls and 6 to 8 parts of polyurea formaldehyde dicyclopentadiene microcapsules. The tung oil modified phenolic resin automobile brake block provided by the invention has the advantages that the toughness is good, the hardness is proper, the wear resistance is realized, the heat resistance performance is excellent, and the preparing process is simple.

A laying pipe for use in the laying head of a rolling mill is configured for rotation about an axis, with an entry end aligned on that axis to receive a hot rolled product, and with a curved section leading to a delivery end spaced radially from that axis. The curved section defines a guide path configured to form the hot rolled product into a helical formation of rings. The laying pipe comprises a tubular ferrous wall having an interior surface comprising a wear resistant boronized layer against which the hot rolled product is confined for movement along the guide path.