SKF 紧凑型倒置滚柱丝杠-SKF compact inverted roller screw

SKF compact inverted roller screw

SKF compact inverted roller screws are designed to pro-vide powerful electromechan-ical actuation where compact-ness and high load capability are prerequisites. In applica-tions such as factory automa-tion, car assembly lines, oil & gas subsea, aerospace, etc., the compact inverted roller screw – incorporated inside an electromechanical actuator –can advantageously replace hydraulic or pneumatic actua-tion, providing the benefits of electronic control.How it works

The compact inverted roller screw works on

the same principle as a planetary roller

screw, with the rollers rotation being syn-

chronized with the threaded shaft through

toothed rings. Either nut or shaft can be ro-

tated by an electric motor, the non-rotating

component thus acting as the push tube of

an actuator. The application loads acting on

the translating push tube transit through

the planetary rollers to the rotating shaft or

nut.

T oothed rings and guiding rings ensure

the rolling motion and the even circumfer-

ential position of the rollers, for perfect load

distribution and for eliminating any parasitic

friction between rollers.

Benefits

Very small lead, down to

1,00 mm,while

providing a high load carrying capacity

High speed

capability

Guiding and sealing functions easily inte-

grated on smooth surface of nut or shaft,

resulting in high performance sealing

Compactness, low weight and reduced

number of parts in overall system

Customized attachment between electric

rotor and screw components, and easy

rotor integration

Screw or nut

directly used as push tube

Long service life, increased reliability im-

proving customer installation productivity

Reduced requirements for electric motor

torque to reach high load actuation

Environmentally friendly solution

The compact inverted roller screw is a solu-

tion provider product for specific applica-

tions where a small lead is required.

SKF – The Knowledge Engineering

Company

knowledge to propose optimized solutions. The compact inverted roller screw works

on the same principle as a planetary roller

screw, with the roller’s rotation being syn-

chronized with the threaded shaft through

toothed rings. Either nut or shaft can be

rotated by an electric motor to allow the

non-rotating component to act as the push

tube of an actuator. The application loads

acting on the translating push tube travel

through the planetary rollers to the rotating

shaft or nut.

T oothed rings and guiding rings ensure

the rolling motion and even circumferential

position of the rollers for perfect load distri-

bution and to eliminate any parasitic friction

between rollers

SKF compact inverted roller screws are designed to pro-vide powerful electromechan-ical actuation where compact-ness and high load capability are prerequisites. In applica-tions such as factory automa-tion, car assembly lines, oil & gas subsea, aerospace, etc., the compact inverted roller screw – incorporated inside an electromechanical actuator – can replace hydraulic or pneumatic actuation, provi-ding the benefits of electronic control.

Compact, low weight and reduced num-ber of parts in overall system

Long service life and increased reliability improve customer installation productivity The compact inverted roller screw is a solu-tion provided for specific applications where a small lead is required.

SKF is the leading supplier of roller screws, and also offers ball screws from miniature dimensions to large sizes. Through our long history of cooperation with industrial equip-ment suppliers, we have developed a unique ability to propose optimized solutions.

?SKF is a registered trademark of the SKF Group.

?SKF Group 2010

The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permis -sion is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein.PUB MT/P8 10592 EN · August 2010

Definitions:

d 0=screw pitch diameter [mm] lead is right-hand [mm]l =referenc

e maximum threaded length

[mm]

L =indicative maximum length [mm]D =recommended minimum outer

diameter [mm]

D p =nominal nut thread diameter [mm]S =reference maximum stroke [mm]Availability and compatibility

SKF compact inverted roller screw is cur -rently available with screw pitch diameter d 0between 12 and 120 mm, lead from 1 to 18 mm, and maximum stroke up to

175 mm depending on screw dimensions.Not all combinations of shaft pitch diam -eter and lead are possible. Please consult SKF for feasibility and recommendations.As a first approach for product selection, designers can consider all planetary roller screw sizes available in SKF catalog, with screw pitch diameter d 0 less than 48 mm but with 3 starts instead of 5, or 4 starts in -stead of 6, while maintaining the same load carrying capacities. For these sizes, the nut dimensions can remain identical to those specified in the catalog, or adjusted upon request. The maximum possible stroke should be confirmed by SKF.The compact inverted roller screw is also available for specific sizes with d 0 greater than 48 mm, and up to 120 mm.

Please contact your local sales office for technical support.

SKF compact inverted roller screw view with engine and bearing

https://www.360docs.net/doc/8013774406.html,

P

h = lead [mm]The SKF compact inverted roller screw is currently available with screw pitch diameter d 0 between 12 and 120 mm, lead from 1 to 18 mm, and maximum stroke up to 175 mm depending on screw dimensions.

When ?rst approaching product selec-tion, designers can consider all planetary roller screw sizes available in the SKF catalog, with screw pitch diameter d 0 less than 48 mm but with 3 starts instead of 5, or 4 starts instead of 6, while maintai-ning the same load carrying capacities. For these sizes, the nut dimensions can remain identical t o those speci?ed in the catalog, or adjusted upon request.

The maximum possible stroke should be

c on?rme

d by SKF.

SKF compact inverted roller screw view with electric motor and bearings