Abstract:
A journal bearing (120) for a shaft (110) is disclosed. The journal bearing (120) includes a joint-less, continuous body having an inner surface (122) defining a bore (124) to receive the shaft (110) and an outer surface (128). A cross-section (150) of the joint-less, continuous body perpendicular to a bore axis (126) includes at least three angular sectors (160, 170, 180). Each one of the at least three angular sectors (160, 170, 180) include at least one of a different microstructure or a different composition than each of neighboring angular sectors of the at least three angular sectors (160, 170, 180).
Abstract:
Provided is a sintered gear (1) as a sintered machine part, which is formed of a sintered compact (M') and which rotates in conj unction with an input of a load from another member onto a radially outer surface while sliding with respect to a shaft (S) inserted along an inner periphery, in which the sintered compact (M') includes an inner layer (2) containing Cu and an outer layer (3) sintered together with the inner layer (2) under a state of being held in contact with the inner layer (2), in which the outer layer (3) includes, as main components, Fe, Cu, and Sn as a low-melting-point metal, and a metal structure of the outer layer (3) includes, as main constituents, Fe structures and Cu-Sn alloy structures, which exist at a grain boundary of the Fe structures and bind the Fe structures to each other.
Abstract:
There is provided a Cu-based oil-impregnated sintered bearing which can be used for high-load applications such as an ABS system and a wiper motor system in automobile, can be manufactured at low cost, and is excellent in abrasion resistance and seizure resistance. The bearing contains 5 to 40% by mass of Ni, 3 to 15% by mass of Sn, 0.5 to 4.0% by mass of P, or further 0.3 to 5.0% by mass of a solid lubricant, and a remainder comprising Cu and inevitable impurities, and has a metallic structure in which a phase mainly composed ofNi and P is dispersed in a matrix, and has a 5 to 25% porosity.
Abstract:
Provided is a sliding bearing that can keep the price low while maintaining a bearing property over a long period. The sliding bearing is a sliding bearing 1 having a bearing periphery portion 2 formed of a metal base material, and a resin layer 3 formed on a surface to be a sliding surface of the bearing periphery portion, wherein the metal base material is an unsintered green compact formed by compacting a raw material powder containing a metal powder capable of forming an oxide film as a major raw material, and the oxide film has been formed between particles of the metal powder by means of steam treatment or the like, and the unsintered green compact has a radial crushing strength of more than 100 MPa.
Abstract:
A metal matrix self-lubricating composite and a manufacturing method therefor. The metal matrix self-lubricating composite comprises a metal matrix and a mixture layer compounded on a surface of the metal matrix, the mixed layer comprising a copper alloy and a self-lubricating material. The method for manufacturing the metal matrix self-lubricating composite comprises the following steps: a) sintering copper alloy powder on a surface of a metal matrix to form a copper alloy layer on the surface of the metal matrix; b) blade-coating or dip-coating a lubricating material on a surface of the copper alloy layer, and performing vacuumization to obtain a metal palate, and drying the metal plate; c) repeating step b) for multiple times; and d) sintering the metal plate obtained in step c) to obtain the metal matrix self-lubricating composite. In the present invention, a vacuumization mode is used and vacuumization operations are repeated, so that a dense mixture layer on which a self-lubricating material is dispersed on a copper alloy is formed, and the metal matrix self-lubricating composite has good lubricity and abrasion resistance.
Abstract:
The purpose of this invention is to achieve an electric air flow control device comprising a motor rotor bearing structure having excellent wear resistance even with loads from striking caused by a high vibrational environment specific to an internal combustion engine. A cylindrical sintered metal slide bearing is used in at least one of a front bearing (16) and a rear bearing (17) that support a rotor shaft (14) of a motor (3) that is the rotary control drive source of a throttle valve (7) that controls the intake air flow to an internal combustion engine, and the bearing design is such that the relationship of the radial crushing strength and the compressive deformation rate of the cylindrical sintered metal bearing has the mechanical properties of a maximum radial crushing strength of 230 N/mm2 or greater and a maximum compressive deformation rate of 3.5% or greater at the maximum radial crushing strength.
Abstract:
Provided is a sintered bearing (1, 2) for a fuel pump, including raw material powder including 8.5% by weight to 10% by weight of aluminum, 0.1% by weight to 0.6% by weight of phosphorus, and the balance including copper as a main component, and inevitable impurities. The sintered bearing (1, 2) has a structure of a sintered aluminum-copper alloy, and has a pore formed in a surface layer portion of the sintered bearing, which is smaller in size than an internal pore of the sintered bearing.
Abstract:
A bearing that is used in a motor pump in which a liquid is, not only pumped by means of an impeller driven by the pump, but also is used to lubricate components of the motor pump including the motor pump shaft. The bearing is for supporting the shaft at at least one location of the shaft. The bearing is constructed of a bronze material having added thereto a small amount of graphite, preferably around 2.5 %.