SKF 带座轴承单元

1、 Y-bearing units ® SKF is a registered trademark of the SKF Group.© SKF Group 2007The contents of this catalogue are the copyright of the publisher and may not be reproduced (even extracts unless permission is granted. Every care has been taken to ensure the accuracy of the information con

2、tained in this catalogue but no liability can be accepted for any loss or damage whether direct, indirector consequential arising out of the use of the information contained herein.Catalogue 6001 EN · March 2007This catalogue supersedes catalogue 5001 E. Printed in Denmark on environmentally fr

3、iendly paper.General (21 Principles of selection and application (11Y-bearings (53Y-bearing plummer block units (75Y-bearing flanged units (109Y-bearing take-up units (161Mounting instructions (169Other related SKF products (197Product index (211ContentsFor ewor d (5SKF the knowledge engineering com

4、pany (6Principles of selection and application (11Designs (12Bearing terminology (13Matrices (16Selection of Y-bearing unit type (18Locating on the shaft (19Loads (20Seals (21Permissible operating temperatures (22Speeds (23Application note (23Selection of Y-bearing unit size (24Load carrying ability

5、 and life (24Selecting the bearing size using the life equations (24Equivalent dynamic bearing load (26Dynamic bearing loads (28Requisite minimum load (28Axial load carrying ability (28Selecting the bearing size using the static load carrying capacity (29Speeds (32Design of Y-bearing arrangements (3

6、4Axial displacement (34Initial misalignment (36Support surfaces (36Shaft tolerances (37Rubber seating rings (38End covers (40Lubrication and maintenance (42Grease fills (42Relubrication (43Relubrication intervals (44Storing Y-bearings and Y-bearing units (46Designation systems (4721 Product data (51

7、Y-bearings (53Y-bearing plummer block units (75Y-bearing flanged units (109Y-bearing take-up units (161Mounting instructions (169Other related SKF products (197Product index (2113The SKF brand now stands for more than ever before, and means more to you as a valued customer.While SKF maintains its le

8、adership as the hall-mark of quality bearings throughout the world, new dimensions in technical advances, product support and services have evolved SKF intoa truly solutions-oriented supplier, creating greater value for customers.These solutions encompass ways to bring greater productivity to custom

9、ers, not only with breakthrough application-specific products, but also through leading-edge design simulation tools and consultancy services, plant asset efficiency maintenance programmes, and the industrys most advanced supply management techniques.The SKF brand still stands for the very best in r

10、olling bearings, but it now stands for much more.SKF the knowledge engineering companyForeword1This catalogue gives a representative overviewof the range of Y-bearings and Y-bearing unitsavailable from SKF. The data in this catalogueis based on the latest standards and productupgrades. However, SKF

11、reserves the right tomake any changes necessary as a result of con-tinuous improvement with respect to materials,design and manufacture.The units used in this catalogue are inaccordance with ISO (International Organizationfor Standardization standard 1000:1992, andSI (Système International dUni

12、tés.This catalogue contains all the data relevantto Y-bearings and Y-bearing units. All the datarequired to select a Y-bearing or Y-bearing unitrespectively are listed in the product tables.Descriptions of the Y-bearing and Y-bearingunit types including design features and otherinformation prec

13、ede each product section.General data regarding selecting a Y-bearing orY-bearing unit type and size, speeds, bearingarrangement design, lubrication, mounting anddesignations are included in the catalogue too.The catalogue is designed so that productinformation is easy to find and use. Each of the9

14、chapters listed in the table of contents isclearly identified by a number and colour.SKF the knowledge engineering companyFrom the company that invented the self-align-ing ball bearing 100 years ago, SKF has evolved into a knowledge engineering company that is able to draw on five technology platfor

15、ms to create unique solutions for its customers. These platforms include bearings, bearing units and seals, of course, but extend to other areas includ-ing: lubricants and lubrication systems, critical for long bearing life in many applications; mecha-tronics that combine mechanical and electronics

16、knowledge into systems for more effective linear motion and sensorized solutions; and a full range of services, from design and logistics support to conditioning monitoring and reliability systems. Though the scope has broadened, SKF con-tinues to maintain the worlds leadership in the design, manufa

17、cture and marketing of rolling bearings, as well as complementary products such as radial seals. SKF also holds an increas-ingly important position in the market for linear motion products, high-precision aerospace bearings, machine tool spindles and plant main-tenance services.The SKF Group is glob

18、ally certified toISO 14001, the international standard for en-vironmental management, as well as OHSAS 18001, the health and safety management standard. Individual divisions have been approv-ed for quality certification in accordance with either ISO9000 or QS 9000.With some 100 manufacturing sites w

19、orld-wide and sales companies in 70 countries, SKF is a truly international corporation. In addition, our distributors and dealers in some 15 000 locations around the world, an e-business marketplace and a global distribution system put SKF close to customers for the supply of both products and serv

20、ices. In essence, SKF solutions are available wherever and whenever customers need them. Overall, the SKF brand and the corporation are stronger than ever. As the knowledge engineering company, we stand ready to serve you with world-class product competencies, intellectual resources, and the vision

21、to help you succeed.Seals Bearingsand units Lubrication systemsMechatronics Services© Airbus photo: e x m company, H. GousséEvolving by-wire technologySKF has a unique expertise in fast-growing by-wire technology, from fly-by-wire,to drive-by-wire, to work-by-wire. SKF pioneered practical

22、fly-by-wire technology andis a close working partner with all aerospace industry leaders. As an example, virtuallyall aircraft of the Airbus design use SKF by-wire systems for cockpit flight control.SKF is also a leader in automotive by-wiretechnology, and has partnered with automotiveengineers to d

23、evelop two concept cars, whichemploy SKF mechatronics for steering and brak-ing. Further by-wire development has led SKFto produce an all-electric forklift truck, whichuses mechatronics rather than hydraulics forall controls.Developing a cleaner cleanerThe electric motor and its bearings are the hea

24、rt of many household appliances. SKF works closely with appliance manufacturers to improve their products performance, cut costs, reduce weight, and reduce energy consumption. A recent ex-ample of this cooperation is a new generation of vacuum cleaners with substantially more suction. SKF knowledge

25、in the area of small bearing tech-nology is also applied to manufacturers of power tools and office equipment.Working in extreme environmentsIn frigid winters, especially in northern countries, extreme sub-zero temperatures can cause bear-ings in railway axleboxes to seize due to lubrica-tion starva

26、tion. SKF created a new family of synthetic lubricants formulated to retain their lubrication viscosity even at these extreme tem-peratures. SKF knowledge enables manufactur-ers and end user customers to overcome the performance issues resulting from extreme tem-peratures, whether hot or cold. For e

27、xample, SKF products are at work in diverse environments such as baking ovens and instant freezing in food processing plantsHarnessing wind powerThe growing industry of wind-generated electric power provides a source of clean, green electri-city . SKF is working closely with global industry leaders

28、to develop efficient and trouble-free turbines, providing a wide range of large, highly specialized bearings and condition monitoring systems to extend equipment life of wind farms located in even the most remote and inhospitable environments.Planning for sustainable growthBy their very nature, bear

29、ings make a positivecontribution to the natural environment, enab-ling machinery to operate more efficiently, con-sume less power, and require less lubrication.By raising the performance bar for our own prod-ucts, SKF is enabling a new generation of high-efficiency products and equipment. With an ey

30、eto the future and the world we will leave to ourchildren, the SKF Group policy on environment,health and safety, as well as the manufacturingtechniques, are planned and implemented to helpprotect and preserve the earths limited naturalresources. We remain committed to sustainable,environmentally re

31、sponsible growth.Maintaining a 350 km/h R&D labIn addition to SKFs renowned research anddevelopment facilities in Europe and the UnitedStates, Formula One car racing provides a uniqueenvironment for SKF to push the limits of bearingtechnology . For over 50 years, SKF products,engineering and kno

32、wledge have helped makeScuderia Ferrari a formidable force in F1 racing.(The average racing Ferrari utilizes more than150 SKF components. Lessons learned here areapplied to the products we provide to automakersand the aftermarket worldwide.Delivering Asset Efficiency OptimizationThrough SKF Reliabil

33、ity Systems, SKF providesa comprehensive range of asset efficiency prod-ucts and services, from condition monitoring hard-ware and software to maintenance strategies,engineering assistance and machine reliabilityprogrammes. T o optimize efficiency and boostproductivity, some industrial facilities op

34、t foran Integrated Maintenance Solution, in whichSKF delivers all services under one fixed-fee, performance-based contract.9 Designs . 12Selection of Y-bearing unit type .18Selection of Y-bearing unit size . 24Speeds . 32Design of Y-bearing arrangements . 34Lubrication and maintenance . 42Storing Y-

35、bearings and Y-bearing units .46Designation systems (47Principles of selection and application211Conventional SKF ball bearing units are referred to as Y-bearing units. These units consist of an insert bearing (a single row deep groove ball bearing with a convex sphered outside diameter a housing, w

36、hich has a correspondingly sphered but concave bore.Y-bearing units can accommodate moderate initial misalignment, but normally do not permit axial displacement. They are ready-to-mount, ready-to-use units ( fig. 1 and available as Y-bearing plummer block units Y-bearing flanged units Y-bearing take

37、-up units.The housings are available in composite material referred to as Y-TECH ( fig. 2 grey cast iron ( fig. 3 sheet steel ( fig. 4.SKF Y-bearing units provide designers with con-siderable freedom of choice so that comprom-ises can be avoided. Some 40 standard series Y-bearing units are available

38、 ( matrices on pages 16 and 17.Because of their versatility and cost effective-ness, Y-bearing units are typically found in the following applications: agricultural machinery, construction equipment, conveyor systems,Designs 122Bearing terminology T o better understand frequently used bearing specif

39、ic terms for Y-bearings Y-bearing plummer block units Y-bearing flanged units Y-bearing take-up unitsthe terms and their definitions are provided on pages 14 and 15. Essentially, these terms conform to those found in the following ISO standards: ISO 3228:1993 “Rolling bearings Cast and pressed housi

40、ngs for insert bearings”. ISO 9628:1992 “Rolling bearings Insert bearings and eccentric locking collars”. A detailed collection of bearing specific terms and definitions can be found in ISO 5593:1997 “Rolling bearings Vocabulary”.Fig. 3Fig. 413DesignsY-bearing ( fig. 5 Array1 Outer ring2 Sphered out

41、er surface3 Lubrication hole4 Inner ring5 Bore6 Cage7 Ball8 Superagriseal9 Flinger10 Eccentric locking collar11 Grub screwY-bearing plummer block unit ( fig. 61 Y-bearing plummer (pillow block housingof grey cast iron2 Housing base3 Housing support face4 Cast dimple for dowel pin5 Attachment bolt ho

42、le6 Y-bearing ( fig. 57 Grease nipple8 Recess for end cover9 Filling slot for Y-bearing 2Y-bearing flanged unit ( fig. 71 Square flanged housing of grey cast iron2 Attachment bolt hole3 Back of flanged housing with or withoutcentring recess4 Cast dimple for dowel pin5 Y-bearing ( fig. 56 Grease nipp

43、le7 Filling slot for Y-bearing 8 Recess for end cover Y-bearing take-up unit ( fig. 81 T ake-up housing of grey cast iron2 Grease nipple3 Y-bearing ( fig. 54 Piloting groove5 Recess for end cover6 Receiving opening for adjustment screwlocation7 Centre bore for adjustment screw 8 Filling slot for Y-b

44、earingDesigns 2The SKF Y-bearing unit product range is exten-sive. It includes three designs with a choice of three different materials for the housing anda variety of Y-bearings that can be locked onto the shaft in very different ways. Because of their design, each Y-bearing unit exhibits character

45、is-tic features that make it more or less suitable for a specific application.For example, Y-bearing units with a pressed steel housing are not capable of supporting heavy loads, can only run at moderate speeds and can not be relubricated. However, they are economical and easy to mount. On the other

46、 hand, housings made of cast iron can withstand significantly heavier radial, axial and shock loads. In addition, cast iron housings have a grease nipple for relubrication, making them a good choice for applications with somewhat higher speed.Since in many cases the selection of a suit-able Y-bearin

47、g unit must take many factors into consideration, there is no way to provide a list of general rules. The following notes should show, however, what factors are the most important ones to consider first locating on the shaft loads seals permissible operating temperatures speeds.Keep in mind that the

48、 total cost of a bearing arrangement and inventory considerations could also influence the final choice.Other important criteria for designing a bear-ing arrangement, such as load carrying capacity and rating life, lubrication, etc., will be dealt with in detail in the corresponding chapters.Selecti

49、on of Y-bearing unit type2Locating on the shaftThere is a choice of four different methods ( fig. 1 by which an SKF Y-bearing unit can be located onto the shaft: Grub (set screws (a . This method enables very easy mounting and dismounting, even if space is limited. This locking method is typically u

50、sed in applications where the shaft alternates direction of rotation. Eccentric locking collar (b . This locking method should be chosen only for those applications where the shaft rotates in one direction only. Adapter sleeve locking (c . This method en-ables a concentric locking of the Y-bearing u

51、nit on the shaft and is appropriate for alternating as well as constant directions of rotation. Interference fit (d . The use of an interfer-ence fit is only available for Y-bearings in the 17262(00-2RS1 and 17263(00-2RS1 series. These bearings and the required housings have to be ordered separately

52、. LoadsThe magnitude of the load is the factor that usually determines the size of the Y-bearing unit to be used. Generally, units with housings made from cast iron or composite material can withstand heavier loads than units with pressed sheet steel housings. Magnitude of load is defined as P 0,02

53、C very light load 0,02 C < P 0,035 C light load 0,035 C < P 0,05 C moderate load 0,05 C < P 0,1 C normal load P > 0,1 C heavy load.Radial loadsIn applications where normal to heavy loads occur, only Y-bearing units with housings made from cast iron or composite material shouldbe used. Th

54、ese units are able to withstand the same dynamic and static loads as their insert bearings and are less sensitive to shock loads ( fig. 2a.Y-bearing units with a pressed steel housing are designed to withstand light to moderate loads and are not able to accommodate shock loads ( fig. 2b.Axial loadsT

55、he axial load carrying capacity of a Y-bearing depends not as much on its internal design as on the way it is locked onto the shaft ( fig. 2c as described in chapter “Axial load carrying abil-ity”, page 28. In general, Y-bearing units with housings made from cast iron or composite material are more

56、suitable for heavier or alter-nating axial loads.Y-bearing units with a pressed sheet steel housing are only intended for light axial loads, in particular the plummer block units incorporat-ing a rubber seating ring ( fig. 2d. Selection of Y-bearing unit type2SealsThe factors that influence the choice of the most appropriate seal include: The peripheral speed at the sealing counter-face.