Friction unit with radial-axial bearing

FIELD: mechanical engineering.

SUBSTANCE: friction unit comprises unmovable axle of the roller (wheel), sector bushing with outer friction surface made of modified wood and secured to the axle, and metallic race mounted inside the housing of the roller (wheel hub) with convex friction surface. The friction surface of the sector bushing is spherical and convex inward. The sector bushing is secured to the unmovable axle of the roller (wheel ) and is clamped from both sides by locking conical rings, face screw, and shaped nut. The metallic race mounted for permitting rotation and embracing the bushing is provided with convex spherical friction surface and secured inside the roller housing (wheel hub) having clamping flat rings with bolts.

EFFECT: enhanced reliability.

2 cl, 2 dwg

 

The invention relates to heavy engineering industries and can be used in slide bearing, with high radial static and dynamic loads, as well as a slight axial displacement and load instead of the self-aligning bearings, rollers, wheels, rollers balancer moving metal: the crane beams, cantilever gantry, gantry and tower cranes, as well as heavy trucks.

Known tapered roller bearings are manufactured according to GOST 5721-75 and THE 24-1-173-70 installed in the friction rollers trucks and rollers balancers cargo movement along the rails have the following disadvantages:

- the design complexity and high cost (more than one order of magnitude compared with the cost of the bearings of the modified wood);

- high intensity and energy intensity of manufacturing bearings, the need for installation of seals to prevent ingress into the bearing abrasive (sand, cement, cinder, and other);

a significant decrease in efficiency when operating in freezing temperatures.

Known friction bearing in the form of a two-layer wood-frame bushings from modified wood (DM) brand PD-CU (A.S. SU 1110952, F 16 33/18, 1982), and supplied in a sleeve brand DM-MKT (A.S. SU 926397, F 16 33/12, 1979), containing wooden is th contour or metal clip and sectoral sleeve, sealed inside a wooden or metal frame (clip), which with high efficiency are used as guides estuarine well pumps in Uzen oil seals (derevokarkasnye) and guide stamps (supplied). Wood - or steel-frame bushings are successfully working as guides when the reciprocating friction and low radial loads and sliding velocities.

The main disadvantages of the known sector of the sleeves of the DM are the lack of reliable, sustainable side edges, on which there is friction with the rotational-axial displacements and loads. Axial movement and dynamic loads lead to increased wear of the boards and their destruction.

Also known flangeless bearings with sliding friction on the spherical surface (U.S. patent No. 5219231, 1993), which contain the shaft is rigidly secured on the sleeve and a metal ferrule, and the sliding friction occurs on the surface of a spherical shape, is described from the center of gravity of the sleeve along its length on the outer surface (the sleeve has a convex barrel-shaped friction surface), which provides the perception of not only high radial loads, but also a small axial displacement and angular deviations of the axes of the shaft and the bearing due to the flat bed friction on the spherical top is the awns. The sleeve is made in the form of two half-rings of an isotropic material. This fundamentally distinguishes it on the device from the proposed us vnutrikvartirnoy sleeve, made of DM with regard to its anisotropy and internal rheological stresses under the influence of heat and moisture, which can significantly increase the carrying capacity and durability of the friction in General.

The closest analogue is known radial-axial bearing of DM containing a rotating shaft (axle) wheel rigidly mounted thereon sector bushing with a spherical convex along the length of the outer friction surface and an outer metal ring, mounted in a stationary housing of the friction with the inner concave inside, covering the sleeve friction surface (patent RF №2222724, F 16 17/10 33/18, 2004). The main disadvantages of radial-axial bearings of DM are: convex along the length of the spherical outer surface of the friction pie sleeve of the DM restricts the allowable load limits of lower magnitude due to the fact that the maximum unit pressure on the friction surface coincides with the maximum camber (maximum length of fiber), sector bushing is not securely fixed to the rotating shaft, resulting in high values of radial what's loads perhaps its slippage.

The invention solves the following tasks:

- increase the maximum permissible radial and axial loads on the friction by reducing the risk of collapse of a spherical convex surface friction and create vnutrimembrannogo state sector sleeves of DM by the compression figured nut in the direction of pressing;

- strengthening of securing and increasing the strength of the clamping pie shaped sleeve of DM on a stationary axle reverse friction pair.

To solve the problem in the friction with radial-axial bearing of the modified wood in the form of a return of the friction pair, comprising a fixed roller axis (wheel), which is rigidly fixed pie sleeve of modified wood, with outer friction surface, and a metal clip attached to the roller housing (wheel hub) with the convex surface friction, according to the invention, the sector sleeve of modified wood with a radial arrangement of fibres has a spherical friction surface, a concave inside rigidly mounted on the fixed axis roller (wheel) and clamped on both sides of the retaining cone rings the butt-end screw and shaped nut and a metal ferrule mounted for rotation, has a convex spherical surface Proc. of the tion, rigidly fixed in the body of the roller (wheel hub) flat clamping rings with bolts. Sectoral sleeve, sandwiched with a preliminary effort has in cross section the shape of a dovetail and a concave inside surface friction. To ensure that the Assembly and disassembly of the friction sector bearing sleeve is made in the form of two semicircles connected and centered in a circle facing each other with pins.

As a rule, at the end of the axis of the balancer is set to one bearing and axles of trucks mounted two bearings symmetrically from two sides at the ends. The outer surface of the sleeve is attached to the axis, has a spherical shape, a concave inward along the length of the sleeve (axis).

Figure 1 shows a friction Assembly, figure 2 presents the scheme of the friction with radial-axial bearing of the modified wood.

The friction consists of the axis of the roller (wheel) 1, the threads which screw nut figure 2 with the reference-pressure flat ring 3. At the sophisticated end of the axis wearing tight-fit sectoral sleeve from DM 4, channel 5 for supplying oil to the surface friction. From the face side on a stationary axle 1 sleeve 4, is clamped the two sides of the retaining cone rings 6, through a flat washer 7, the end of the screw 8 with the retainer spring washer 9. End of the screw 8 is screwed into the end of axis 1, the closed ends of the second cover 10, mounted on the roller is able to rotate, or the wheel hub, allowing you to retain lubricant on a spherical surface friction. End sleeve of DM 4 consists of two split ring (polovchak), which are centered against each other with a pin 11.

Metal cage 12 (reverse friction pair) with a convex outer spherical surface friction is clamped flat rings 13 and bolts 14 is rigidly fixed in the body of the roller 15, to which is also rigidly bolted, hinged end cover 10. At the end of the threaded bolts 14 are nuts 16 which clamp lock washer with safety shut-off valve 17. Curly nut 2 is fixed on a special metric (sewn-in) thread 18. To feed oil to the surface friction is the channel (hole) 19 lubricator 20.

Metal cage 12 (reverse rotating friction pair) has a convex outer surface friction, described the same radius as the concave inside of the spherical surface of the bushing from the DM. The radius described by the spherical surface friction metal sleeve equal to the distance between the center of gravity of the sleeve to the left or right of the initial point of the friction surface located on the edges of the sleeve on the outer surface of the friction. The center of the circle of the spherical concave inside p is the surface friction of the sector sleeve, described by the radius R, from the point of intersection of the transverse axis of symmetry sector of the sleeve with a conditional line, located at a distance ofwhere b is the length of the sleeve from the side of the spherical surface friction from the actual longitudinal axis of symmetry of the sleeve (cervical axis), as shown in figure 2.

For a more reliable fastening on axis 1 support-flat clamping ring 3, flat washers 7 and the retaining cone rings of 6, set of keys (not shown), and their side surfaces have a slight corrugation. Sectoral sleeve from DM 4 securely with a large preload is clamped on both sides and pressed against a circumferential surface of the axle 1 by bevel cone retaining ring 6, as shown in figure 2.

The Assembly of the friction produced in the following sequence. On the open end of axis 1 from refined cervical wrapped around a massive nut figure 2 and install the anchor-flat clamping ring 3 is mounted on the metric threads 18 of the axle 1. To build split pie bushing from the DM, you must first wear on the axle and put on curly massive nut first flat clamping ring 13 for clamping the metal sleeve bearing 12. After that, until it stops (collar) cervical axis put the first retaining cone ring 6 and the first semi-circle sector bushing is C DM 4 (tight fit). Next, install the metal clip 12 to the housing of the roller 15, and then put it on a pin and center pin 11 of the second semicircle pie bushings from DM 4, then install the second retaining the tapered ring 6, and flat washer 7 end screw 8 is pressed against the sector sleeve from DM 4 from the end face of the axle 1. Face tightening the screw 8 to failure and fix the retaining spring nut 9, and then screw up to failure figure the nut 2 and the sector sleeve from DM 4 with a large preload is clamped. Establish into place the second flat ring 13 metal sleeve 12, setting in place the end cap 10; insert into holes the bolts 14 and put the retaining ring 16, with protective clipper oil 17, wrap and tighten the nuts of bolts 14 on the roller 15.

Tightening up of refusal end of the screw 8 and the fixing of its position retaining spring nut 9, and full tightening and fixing the figure of the nut 2, the retaining cone rings 6 creates vnutrikabinnoe state sector bushing from DM 4. Internal rheological voltage which is increased under the influence of humid-temperature condition of the wood sector bushing DM 4, are treated and compensated figured nut 2. Next fill fitting 20 with grease or other lubricant depending on the temperature of the environmental protection, create pressure in channel 19 lubrication and the friction unit is ready for operation.

For convenience, the axis with the pin when the Assembly must take the vertical position under the vertical pressure.

The friction works in the following way. Together with the housing of the roller (wheel) 15, which rotate while rolling on rails or other guides, rotates rigidly fixed therein a metal ferrule 12. The rotation of the housing of the roller (wheel) 15 is the sliding friction metal sleeve 12 with a convex spherical surface on the concave spherical surface of the sector sleeve from DM 4, mounted on a stationary axle 1.

Axial and radial run-out roller (wheel)rotating ring of a spherical surface, are compensated by their lateral movements due to rounding along the sleeve on the spherical surface and gaps on both sides along the edges of the curves along the sleeve. Due to this rotating rollers (wheels) can at a small angle (3...7°incline to the right or to the left (in one way or another party) in relation to the vertical axis without lateral friction on the shoulder of the bearing and the axis, which greatly softens the dynamics of the load during movement.

The cost vnutrimembrannogo bearing of DM more than an order of magnitude lower than the cost of commercially available roller bearings. While their Dolgova the face when working in conditions of periodic lubrication with grease and at loads up to 40 MPa reaches, and when working in abrasive environments significantly exceeds the durability of the roller bearings.

1. The friction with radial-axial bearing of the modified wood in the form of a return of the friction pair, comprising a fixed roller axis (wheel), which is rigidly fixed pie sleeve of modified wood with outer friction surface, and a metal clip attached to the roller housing (wheel hub) with the convex surface friction, characterized in that sector bushing of the modified wood with a radial arrangement of fibres has a spherical friction surface, a concave inside rigidly mounted on the fixed axis roller (wheel) and clamped on both sides of the retaining cone rings, end screw and nut figure and a metal ferrule mounted rotatably and covering sleeve has a convex spherical shape of the friction surface, rigidly fixed in the body of the roller (wheel hub) flat clamping rings with bolts.

2. The friction unit according to claim 1, characterized in that sector sleeve, sandwiched with a preliminary effort in cross section has the shape of a dovetail and a concave inside surface friction.

3. The friction unit according to claim 1, characterized in that to ensure the Assembly and disassembly of the friction sector vtalk the bearing is designed as two half-rings, United and centered in a circle facing each other with pins.



 

Same patents:

The invention relates to mechanical engineering and can be used in slide bearing, experiencing in addition to radial loads, axial displacement and dynamic loads

The invention relates to the field of creation of antifriction materials based on pressure-treated wood and can be used in mechanical engineering

Gas-static bearing // 2196926
The invention relates to the field of mechanical engineering, mainly can be used in machines and devices with moving parts operating under conditions of gas lubrication

Gas-static bearing // 2194889
The invention relates to the field of engineering, mainly can be used in machines and devices with moving parts operating under conditions of gas lubrication

The invention relates to woodworking industry, in particular to the fabrication of the modified wood, and can find application in the furniture industry, mechanical engineering, silkscreen as a substitute bearings
The invention relates to the field of engineering, mainly can be used in machines and devices with moving parts operating under conditions of gas lubrication

Gas-static bearing // 2185532
The invention relates to the field of mechanical engineering, mainly can be used in machines and devices with moving parts operating under conditions of gas lubrication

Gas-static bearing // 2171924
The invention relates to the field of engineering, mainly can be used in machines and devices with moving parts operating under conditions of gas lubrication

The invention relates to powder metallurgy and can be used for self-lubricating bearings

FIELD: turbine building.

SUBSTANCE: invention is designed for use in turbine shaft lines. Proposed journal-thrust bearing contains thrust blocks arranged at both sides of support surface of insert mating through spherical surface with bearing race. Insert is provided with radial ring projections between which thrust blocks with working surfaces pointed to each other are installed. Diameter of support surface of insert exceeds root diameter of blocks. Such design of bearing increases diameter of support surface with out increase of outer (peripheral) diameter of blocks and prevents getting of used oil from support surface to working surfaces of blocks.

EFFECT: increased carrying capacity and reliability of journal-thrust bearing.

1 dwg

The invention relates to mechanical engineering and can be used in the petrochemical industry and refrigeration

The device bearing // 2229629
The invention relates to a bearing device in which the plate or on the same surface of the door, window or similar parts of a fixed bearing, acting both in the axial and in the radial direction, and the handle or other forcing means, rotatable about the plate

The invention relates to mechanical engineering and can be used in slide bearing, experiencing in addition to radial loads, axial displacement and dynamic loads

-thrust bearing // 2159876
The invention relates to mechanical engineering and can be used when creating a journal-thrust bearings designed to operate in severe conditions, for example, as a bearing of the rotor of a steam turbine operating at high loads and speeds, and also subjected to significant heating

The slide bearing // 2074992
The invention relates to mechanical engineering and can be used in a variety of friction units of machines and mechanisms

FIELD: turbine building.

SUBSTANCE: invention is designed for use in turbine shaft lines. Proposed journal-thrust bearing contains thrust blocks arranged at both sides of support surface of insert mating through spherical surface with bearing race. Insert is provided with radial ring projections between which thrust blocks with working surfaces pointed to each other are installed. Diameter of support surface of insert exceeds root diameter of blocks. Such design of bearing increases diameter of support surface with out increase of outer (peripheral) diameter of blocks and prevents getting of used oil from support surface to working surfaces of blocks.

EFFECT: increased carrying capacity and reliability of journal-thrust bearing.

1 dwg

FIELD: mechanical engineering.

SUBSTANCE: friction unit comprises unmovable axle of the roller (wheel), sector bushing with outer friction surface made of modified wood and secured to the axle, and metallic race mounted inside the housing of the roller (wheel hub) with convex friction surface. The friction surface of the sector bushing is spherical and convex inward. The sector bushing is secured to the unmovable axle of the roller (wheel ) and is clamped from both sides by locking conical rings, face screw, and shaped nut. The metallic race mounted for permitting rotation and embracing the bushing is provided with convex spherical friction surface and secured inside the roller housing (wheel hub) having clamping flat rings with bolts.

EFFECT: enhanced reliability.

2 cl, 2 dwg

FIELD: production of supporting-thrust slider bearings preferably used for rotors of steam turbines and turbo-generators of average and high power.

SUBSTANCE: supporting-thrust slider bearing has casing consisting of upper and lower half circles, upper and lower supporting half inserts with supporting spherical surfaces, said half inserts being mutually engaged with inner bore of half rings of bearing casing, working and mounting shoes, inner annular channel provided in upper and lower half inserts, lubricant feeding and discharge grooves for working and mounting shoes, and oil seal unit. Upper and lower supporting half inserts with supporting spherical surfaces are positioned in spaced relation therebetween. In lower half ring of bearing casing there is channel for feeding lubricant under high pressure from independent outer source through feeding unit comprising back valve, as well as from internal source through two inner cross channels connected to pockets provided on spherical supporting surface of lower half ring of bearing casing. Basic feeding of lubricant onto supporting surface of lower supporting half ring is provided through channels arranged at an angle to horizontal plane of detachment of supporting half inserts and connected to inner annular channel, and feeding of lubricant to working and mounting shoes from inner annular channel is provided through upper as well as lower supporting half inserts via radial-axial channel system. Cooling of working and mounting shoes and discharge of used lubricants from spaces between disks of rotor and from spaces between shoes of supporting-thrust bearing are performed using system of radial and tangential channels provided in lower and upper supporting half inserts. Discharge of used lubricant from supporting members of supporting half inserts is provided through radial-end bevels formed at two sides of supporting surface of supporting half inserts, as well as radial channels formed on supporting spherical surface of supporting lower half insert, near region wherein lubricant is discharged from bearing layer of hydrodynamic wedge.

EFFECT: optimal conditions for self-adjustment of supporting-thrust bearing, optimized thermal mode, enhanced reliability of vibration conditions and increased bearing capacity of supporting-thrust bearing with all operating modes.

4 cl, 4 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to rotating machines. Bearing rotating around vertical axle of rotation is made in form of sliding bearing and it contains first means for axial resting in form of carrying bearing and second means for radial resting. First and second means are combined into one combination radial-axial bearing. Said radial-axial bearing has horizontal and radial sliding surfaces and it is held in axial direction by axial support. Radial-axial bearing contains also several separate segments in from of circular ring sectors arranged over ring at a distance from each other around axle of rotation. One axial and one radial sliding surfaces are made on each bearing segments. Bearing segments are provided with holes with connecting branch pipe and connecting channels to deliver lubricating oil. Lubricating oil is fed through outlet holes to axial and radial sliding surfaces of bearing segments.

EFFECT: simplified design, reduced friction losses.

6 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention relates to plain bearing for suspension strut of four-wheel vehicle. Proposed bearing comprises upper collar (3) made in synthetic rubber and furnished with circular lower surface (2), lower collar (5) made in reinforced-synthetic rubber and applied on the said upper collar to revolve about its axis. The said lower collar has also circular upper surface (4) arranged opposite surface (2), and circular thrust part (6) made in synthetic rubber and arranged between surfaces (2) and (4). Lower collar (5) has surface (36) making a seat of cylindrical spring (61) and arranged on lower surface (25). Lower collar (5) comprises circular thrust section (12), upper cylindrical section (24), formed entirely on upper surface (23) of section (12). Surface (4) and lower cylindrical section (26) are formed on lower collar (5). The lower cylindrical section (26) is formed entirely on surface (25) of circular thrust section (22). Note here that surface (25) of section (22) arranged on radially outer surface (26) makes surface (36) of the seat of spring (61). Note also that sections (12), (24) and (26) comprise multiple tapered chambers.

EFFECT: reduced vehicle suspension weight and running gear cost.

13 cl, 6 dwg

Up!