Abstract:
A sintered sliding member comprises a back metal (21a) and a ferrous sintered sliding body (20) which is sintering-bonded to the back metal (21a). The ferrous sintered sliding body (20) has martensite phase having a solid soluble carbon concentration of 0.15 to 0.5 wt % and contains carbide in a content of 5 to 50% by volume. The sintered sliding member is excellent in abrasion resistance, seizing resistance and heat crack resistance.
Abstract:
There is provided an oil-impregnated sintered bearing which enable to prevent oil leakage from an outer peripheral surface 7 of an bearing body 2. The oil-impregnated sintered bearing 1 includes a bearing body 2 which is made of a porous sintered alloy containing vacancies 8 and has a bearing hole 3 in which a rotary shaft can be inserted, wherein the vacancies 8 opened on an outer peripheral surface 7 of the bearing body 2 are crushed. The vacancies 8 may be crushed in the state of a green compact P, or in the state of a sintered alloy after sintering the green compact P. Consequently, the oil leakage from the outer peripheral surface 7 of the bearing 1 can be prevented, and oil pressure in the bearing hole 3 can be preserved.
Abstract:
A friction-reducing abrasion resistant bearing material is described. The material comprises a monolithic, porous polytetrafluoroethylene (ePTFE) having dispersed therein a wear-resistant thermosetting or thermoplastic resin material.
Abstract:
An axial flow fan motor having an impeller molded integrally with a shaft from a synthetic resin. The shaft is easily assembled with a bearing arrangement by being brought into tight contact with the inner ring of the bearing arrangement and is reliably fixed thereto in the elastic region of the shaft. A through hole is formed in the shaft along its central axis. After the shaft is fit into the inner ring of the bearing arrangement, a metal pin is pressed into the axial through hole. Because the pin is pressed in, the shaft is elastically expanded and brought into tight contact with the inner ring and fixed thereto in the elastic region of the shaft. Furthermore, the distal end portion of the shaft elastically outwardly expands and is pressed against the end surface of the inner ring, thereby preventing the bearing arrangement from coming off the shaft.
Abstract:
Disclosed is an oil-impregnated sintered bearing in which local relative sliding between the oil-impregnated sintered bearing and the shaft is avoided, thereby mitigating stress concentration on the bearing surface of the oil-impregnated sintered bearing. An oil-impregnated sintered bearing 1 which has in its inner periphery a bearing surface 1a making relative sliding with the outer peripheral surface 22a of a shaft 22 and which has at both axial ends of the bearing surface 1a crowning portions 1c which are of a configuration satisfying the following conditions: 1.75×10−3≦γ/b1≦5.2×10−2, and 1.75×10−3≦γ/b2≦5.2×10−2, and 0.2≦(b1+b2)/a≦0.8, where γ is the maximum radial drop amount of the crowning portions 1c, b1 is the axial length of the crowning portion 1c at one axial end; b2 is the axial length of the crowning portion 1c at the other axial end; and a is the total axial length of the oil-impregnated sintered bearing 1.
Abstract translation:公开了一种油浸烧结轴承,其中避免了浸油烧结轴承和轴之间的局部相对滑动,从而减轻了油浸烧结轴承的轴承表面上的应力集中。 一种浸油烧结轴承1,其内周具有轴承表面1a,轴承表面1a与轴22的外周表面22a相对滑动,并且在轴承表面1的两个轴向端处具有隆起部分1c, 具有满足以下条件的配置:1.75×3 -3 <=γ/ b 1 <= 5.2×10 -2 -2,和1.75×10 -3〜 SUP> <=γ/ b 2 <= 5.2×10 -2 -2和0.2 <=(b 1+ b 2)/ a <= 0.8,其中γ是冠状物的最大径向下落量 部分1c,b1是在一个轴向端处的隆起部分1c的轴向长度; b 2是另一个轴向端部处的隆起部1c的轴向长度; a是油浸烧结轴承1的总轴向长度。
Abstract:
A high performance main bearing cap has particular surfaces densified for improved fatigue crack resistance. The surfaces densified are the bolted face (F) inside of a perimetral margin and outside of bold head interface areas around the main bolt holes (B), the surfaces of the main bolt holes and the side bolt hole threads (S). Preferred methods of densification are single needle programmable pattern peening of the bolted face peened area, over-burnishing of the bolt holes, and forming the threads rather than cutting them for the side bolt threads.
Abstract:
There is provided a sintered oil retaining bearing that secures the stability of an oil film and achieves high running accuracy through management to exclude a variation in the size of surface openings in the bearing surface, particularly the presence of large holes, while making use of such advantages as the mass productivity, low noise and low cost features of sintered oil retaining bearings. In a sintered oil retaining bearing 11 having a bearing body 19 that is composed of a porous body formed of a sintered metal, that is formed with a bearing surface 18 opposed to the outer peripheral surface of a rotary shaft 1 through a bearing clearance and that is impregnated with lubricating oil or lubricating grease, it is arranged that surface openings in said bearing surface 18 are substantially uniform in size and that when the area of a single such surface opening is converted into the area of a circle, the diameter of such circle does not exceed 0.05 mm.
Abstract:
The object of the present invention resides in providing a sliding member having a sliding layer on the sliding surface which is further improved in sliding characteristics, particularly, wear resistance and, besides, improved in bonding force of the sliding layer. In the present invention, a plating layer 1a is provided on the surface of a substrate 1 comprising stainless steel or carbon steel, and a porous layer 2 is provided by spreading metal powders of a copper alloy or the like on the surface of the plating layer 1a and sintering the metal powders. Then, the porous layer 2 is impregnated and coated with a sliding layer 3 containing PBI and 1-70 vol % of a solid lubricant.
Abstract:
A main bearing cap (A′) made of powder metal has a body portion (Y) made from one powder metal material (Q), and a bearing arch portion (H), foot joint face portions (S) and/or wings (W) made of a different powder metal material (P). The material (Q) of the body portion (Y) is harder than the material (P) of the other portions (H, S, W), and the material (P) of the other portions (H, S, W) is relatively machinable. For the bearing arch portion (H), the machinability of the material (P) approximately matches the machinability of the bearing support structure (B) to which the bearing cap (A′) is assembled to produce a good quality bore and longer tool life during line boring. The bearing arch material (P) may be a bearing material.
Abstract:
A sliding bearing bushing has a first end side, a second end side, an inwardly cylindrical second longitudinal portion which is calibrated by a material compression and adjoins the second end side, a substantially hollow conical first longitudinal portion which adjoins the first end side, and a third longitudinal portion which is arranged between the first and second longitudinal portions, the third longitudinal portion transferring bend-free from a contour of the second longitudinal portion into a continuous curvature so that, in a contour of the cylindrical portion straight lines located parallel to a longitudinal axis of the sliding bearing bushing are tangents to a curvature, and at least in a region of the tangents at the curvature the material of the sliding bearing bushing is compressed by calibration substantially identically strong as in the cylindrical longitudinal portion.