Block-crankcase tunnel type with integral cylindrical bearings for indigenous crankshaft journals
(57) Abstract:Usage: machinery, reciprocating internal combustion engines. The inventive each cylindrical sliding bearing block crankcase is made of two parts with the annular grooves on the outer surface of the grease, installed with a clearance in the bore of the corresponding support tunnel block casing for rotation and fixed against movement in the axial direction of the retaining rings. 2 Il. The invention relates to the field of engineering, namely for reciprocating internal combustion engines.Known block-crankcase tunnel type with roller bearings for indigenous crankshaft journals. Indigenous shaft bearing are treadmills for roller bearing. The outer rings of the bearings are fixed in the axial direction in the bores of the block-crankcase retaining rings. The bearing of the first bearing with inner ring is persistent (See. for example, kN. "Diesels ZV S. Technical description". Ed. N 3/R-A7, S. 17, 25, S. 29, Fig. 7).The disadvantages of the known constructions of block-crankcase are: the complexity of installation and installation of bearings on the crankshaft and in BC Ankeny resource work roller bearings, high accuracy and complexity of their manufacture; the complexity of the repair and restoration of the block-crankcase and crankshaft.Known bearings for indigenous journals of a crankshaft mounted in a crankcase tunnel type with applications semicircular bases, liners cover connected blocks with the base, and the gland segment. The segment is made in two parts, which are symmetrically located relative to the vertical axis of the hole, the hinge connected to the lid and the spacer bolt, decompresses part of the segment in the tangential direction (see USSR author's certificate N 144348, F 16 C 9/02, F 16 M 1/022).The main disadvantage of the known construction is the high complexity of the manufacture of the bearing, consisting of a large number of components which require joint processing.In addition, the uneven pressure of the base and the segments of the bearing hole of the tunnel Carter do not prevent the formation of ovalization of the holes in the crankcase and have difficulty when mounting shaft.Known bearings for indigenous journals of a crankshaft mounted in a crankcase tunnel type, the body of which consists of two halves, the degree is (see Express information "Piston and gas turbine engines", VINITI, No. 26, S. 1, Fig. 1).Known design does not prevent ovalization holes tunnel block-crankcase, due to the unilateral pressure from the bolt, locking the bearing housing.In addition, known methods of locking the bearing housings in the holes in the crankcase tunnel type exclude the possibility of installing different types of plain bearings or rolling on the principles of interchangeability, because it does not provide for locking the outer cone bearings, if they are installed against axial movement.Block housings tunnel type with roller bearings for indigenous crankshaft journals are used for special high-speed diesel engines and have a relatively high manufacturing cost and low service life.Known for the design of the block casing tunnel-type bearings for indigenous crankshaft journals, selected as a prototype, with a body consisting of three parts connected by bolts and inserts. The connector parts of the bearing housing is made of T-shaped gear and the housing is secured in the bore of the tunnel with one of cylind the use of thin-walled liners. The axial fixation of the bearing housing in the work achieved by the interference fit of the bearing in the bore of the tunnel (see, for example, and.with. USSR N 162004, F 16 C 9/02).A disadvantage of known construction are: the complexity of manufacturing the bearing housing of three parts; the high complexity of Assembly and disassembly, as well as locking the bearing in the tunnel block-crankcase; design eliminates the possibility of optionally installed in the block-crankcase crankshaft roller bearings, because it does not provide for locking the outer cone bearings against axial movement.The goal is to increase the service life of the engine, improving the mounting of the crankshaft, creating a block casing, suitable for installation in without any modifications, crankshaft with bearings and rolling.The solution is achieved in block-crankcase tunnel type with integral cylindrical bearings for indigenous crankshaft journals and thin liners that each cylindrical sliding bearing is made of two parts with the annular grooves on the outer surface of the grease (for example, its facilities at the Moscow-292 ultradispersed diamond dust), installation from moving in the axial direction of the retaining rings. The set of essential features of the claimed invention, a sufficient and necessary to achieve provided by the invention the technical result of the task.The invention is illustrated in the drawing, where:
in Fig. 1 shows a longitudinal section of the block casing tunnel-type crankshaft and bearings;
in Fig. 2 bearing, thin-walled liners.In boring a tunnel block casing 1 has a crankshaft 2, which relies indigenous tails on several identical cylindrical bearings 3.The bearings 3 mounted in the bore bearings tunnel block casing with a gap. In the axial direction of the bearings 3 are fixed retaining rings 4 within the bore bearings tunnel block crankcase. On the outer cylindrical surface of the bearing 3 has an annular groove 5, in which before installing the crankshaft 2 bearing 3 in block-crankcase laid plastic lubricant.Indigenous neck when the engine is lubricated by oil flowing through drilling 6 in the crankshaft.The bearing consists of two halves 7 and 8. In the lower half of the 8 screw two studs 9. the wines 7, 8 relative to each other set, the two pins 12. In the inner bore of the bearing halves make two liner 13 and 14. For fixing the inserts have a special bent antennae 15 and 16, which during Assembly are specially progresirovanie grooves of the bearing halves.To maintain the required cylindrical shape of the inner and outer final bore of the bearing halves produce Assembly in active state (without liners).The bearing Assembly and installation of the crankshaft as follows: at the root of the neck of the crankshaft 2 are mounted bearings 3 with inserts 13 and 14; they check for smooth rotation of the bearing 3 on the crankshaft 2; in the grooves 5 of the bearings 3 is laid plastic lubricant; block-crankcase 1 is heated to a temperature of 80-90oC (e.g. Strait of hot water); in the tunnel block casing 1 from the side opposite the transfer invested the crankshaft 2 bearing 3; bearings 3 are fixed in the axial direction of the retaining rings 4.Due to the fact that between the bearings and bores of the tunnel block-crankcase there is a gap and the fact that the crank case is pre-heated, the mounting of the crankshaft needle bearing are fixed in the bores of the tunnel the block casing. To save the gap between the bores of the block-crankcase and bearings during operation of the engine block crank case and the outside of the bearing are made from the same material (in our case, cast iron RF-40).The absence in the bores of the tunnel block-crankcase locking against rotation bearing device, the lack of influence of ovalization of the tunnel block-crankcase, and the use of retaining rings allows the same block crank case to install the crankshaft with bearings and rolling bearings, i.e., stored interchangeability.During operation of the engine bearings will rotate in the bores of the tunnel block-crankcase at the rate of 1-2 rpm, equal to the rotation speed of the outer cone bearings. Block-crankcase tunnel type with integral cylindrical bearings for indigenous crankshaft journals, including tocontinue liners, wherein each cylindrical sliding bearing is made of two parts with the annular grooves on the outer surface of the grease, installed with a clearance in the bore of the corresponding support tunnel block casing for rotation and fixed against movement of the
FIELD: engines and pumps.
SUBSTANCE: invention is related to intermediate bearings of engines and more precisely to devices and methods for installation of intermediate bearing on crankshaft. Method consists in the fact that intermediate bearing (162) is placed on central hub (160), and further intermediate bearing (162) is pressed between central hub (160) of crankshaft and central partition (116, 118) of engine tray. To install intermediate bearing (162) in tray (110) of engine and to connect it to central partition (116, 118), device is used, which represents tool (200) comprising two halves (210, 230).
EFFECT: creation of simplified method for installation of intermediate bearing, in which: number of elements required for installation is reduced, installation flexibility and adaptability are provided.
44 cl, 5 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention refers to automobile engineering, to river craft and marine. The bearing for an internal combustion engine with reciprocal motion of a crank mechanism consists of a separator, rollers and of internal and external rings. Also the separator is connected to the housing of the engine by means of threaded connection wherein wear of the separator, rollers and internal and external rings can be regulated.
EFFECT: increased service life of engine.
FIELD: machine building.
SUBSTANCE: sliding bearing consists of half-round upper insertion and half-round lower insertion separated one from another. The upper insertion consists of the first oil-conducting channel for supply of lubricating material (motor oil) from outside into a gap between the bearing and a shaft and the second oil-conducting channel facilitating flow of oil in a circular direction of the bearing. The first channel includes an opening in internal circumference opened into internal circumference of the upper insertion. The upper insertion includes a part without an internal recess without a channel on a back side relative to the opening in internal circumference in the direction of shaft rotation. An auxiliary oil-conducting channel for oil release from the second channel is made in at least one of lower insertions and in a zone on the next side of the opening in circumference in the direction of rotation. The second channel runs to a front side in the direction of shaft rotation from the opening in internal circumference to the auxiliary channel. In the second version the upper insertion of the bearing included a front end part on the front side relative to the opening, while the lower insertion includes the back end part corresponding to the front part. The auxiliary channel is formed with channels of an unloading recess and a face made on the internal circular side of at least one of the front parts of the upper insertions and the back part of the lower insertion. Oil consumption of the face channel is bigger, than oil consumption of material in the channel of the unloading recess. Also there is claimed the facility of torque transfer and the engine containing the sliding bearing.
EFFECT: sliding bearing with decreased amount of lubricating material coming out of oil gap preventing damages caused with foreign impurities.
14 cl, 48 dwg
FIELD: machine building.
SUBSTANCE: invention refers to bearing unit of crankshaft of internal combustion engine. The bearing unit consists of bearing (10) mounted on crankshaft (16) of the internal combustion engine, of seat (11, 15) of the bearing designed for placement of bearing (10) and of system (20) of packing designed for sealing relative to crankshaft (16) and seat (11, 15) of the bearing. At least one part of seat (11) of the bearing has a reinforcing element (12) positioned in the seat of the bearing. Also, surface (13) of at least one part of seat (11) of the bearing adjoining bearing (10) is made out of plastic. There are also claimed the internal combustion engine comprising the said bearing unit and a hand tool with a mechanical drive containing the said internal combustion engine.
EFFECT: improved bearing unit of crankshaft due to bearing unit sealing and optimal installation of bearing and/or bushing of bearing in seat of bearing with decreased allowances, which prevents bearing and/or bushing of bearing rotation in bearing seat; minimised hazard of bearing distortion and bearing and/or bushing of bearing compression in bearing seat under force causing finite destruction of bearing and/or bushing of bearing.
13 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: unit of transmission mechanism, particularly, of internal combustion engine, consists of shaft (1) and of at least another one part (2, 3); also, shaft has bearing journals for installation in corresponding bearing orifices made in said part (2, 3). Surface of a bearing journal is equipped with antifriction coating; also, surface of a corresponding bearing orifice directly contacts this anti-friction coating. Anti-friction coating has a multi-layer structure. Here there is also claimed the shaft for the said unit of the transmission mechanism; the shaft can be a crank- or camshaft of the internal combustion engine.
EFFECT: simplified design of transmission mechanism unit; reduced weight and cost of units.
14 cl, 2 dwg
FIELD: machine building.
SUBSTANCE: method involves measurement of diameters of primary supports of case, main journals of crankshaft, their misalignment values, thickness of upper and lower inserts, sorting of parts as per dimensional groups, selection of sets of parts in a batch by simulating the assembly considering all the measurement parameters and calculation of total completing error. At that, inserts are chosen as to their thickness by calculating "working" gaps in the zone of their maximum approximation under load, considering the measurement parameters of each primary support and similar main journal. Parts are sorted, and at the same time, accuracy of radial gap is calculated by comparing it to allowable limit values of radial gaps and by choosing the measured dimensions of contact surface of completing parts, which are the closest as to the value. Simulation is performed by using geometrical plane model of mounting assembly and performing mathematical simulation and computer-aided selection of the required combination of sizes of thicknesses of upper and lower inserts of secondary journals. Then, the required thicknesses of inserts are chosen by deducting from "working gap" value the corresponding values of limit values of radial gaps in each similar pair of main bearing-main journal of crankshaft, by using the data of actual measured sizes of diameters of holes of primary support of diesel engine casing, main journals of crankshaft, thicknesses of upper and lower inserts of main sliding bearings using combinatory relationship of design radial gap.
EFFECT: improving the accuracy of radial gaps and efficiency of assembly process due to automation of completing process of multi-support bearing assembly.
6 dwg, 3 tbl
FIELD: machine building.
SUBSTANCE: metal cap (1) comprises an arched section (2) forming the bearing surface, left and right flange sections (3) which are placed and connected with the opposite ends of the arched section (2), bush sections (4) placed so that to rest on the back surfaces of the left and right flange sections (3) and through which assembling bolts are inserted, and a recess (12) formed between the two bushes (10). Each of the bush sections (4) is formed with a recess (12) and includes two holes (11) for a bolt passing through each of the flange sections (3), and two bushes (10) embracing the holes (11) for the bolt. The bushes (10) are interconnected by a rib (13) placed so that to be able of crossing the recess (12) between the bushes (10) on the front end face side.
EFFECT: provision of a cap that shall be cast inside a light-metal element as a frame and that provides for the reduction of bearing surface deformation and is suitable for improving the connection with the light-metal element.
4 cl, 8 dwg
FIELD: machine building.
SUBSTANCE: invention relates to and crankshaft bearing caps, in particular, to attachment of these bearing caps. Cap (10) of crankshaft bearing of internal combustion engine has a shape of semicylinder (13) with its axis aligned with crankshaft axis and comprises diametrically opposite attachment supports (20). Each support (20) is made in the form of a post resting on the heel (26), and has essentially oval top surface (18), which includes a support surface (16), surrounding the hole (15) for passage of a fastening screw and bearing surface for screw head, the said surface surrounding passage opening (15). Attachment Support (20) comprises at least two vertical slot on its outer side surface extending from the base support on heel (26) and continued in the section support height. Slots are arranged outside of vertical support cylinder, its base equal to the support surface (16), and outside the volume confined by crosswise plane passing through the axis of the fastening holes and located symmetrically relative to direction along the length.
EFFECT: optimised shape of bearing cap supports.
6 cl, 7 dwg
FIELD: machine engineering.
SUBSTANCE: instrument for turning the parts of a bearing assembly lining comprises a lining divided into at least two parts. The instrument comprises a device designed to affect one of the at least two mentioned parts of the lining and rotate all parts of the bearing assembly liner.
EFFECT: maintenance of the lining parts is provided without disassembling the machine or its parts.
9 cl, 22 dwg