DD221987A1 - ROTARY ACTUATOR DRIVE, ESPECIALLY FOR TURNING CRANES WITH WHOLESALE SHAFT BEARINGS - Google Patents

Abstract

The invention relates to a controllable slewing drive on an electromotive basis, in particular for slewing cranes with a slewing bearing in which a pivoting or rotational movement about a vertical axis is required. The aim is to reduce the effort to realize a slewing drive and eliminate mechanical wear. The task is to design a direct-acting slewing drive, the space required for the drive is reduced by a compact design. According to the invention, the required force component for generating the relative movement between the fixed lower part and the rotatable upper part is achieved by a linear traveling field. A large rolling bearing consisting of several rings is firmly connected to a secondary part. The secondary part is influenced by a primary part. A support structure, which is at the same time magnetic reflux, establishes the connection of the primary part with a multi-ring large-diameter rolling bearing. The invention is applicable to slewing cranes of all types and other materials handling equipment. Fig. 1

Description

a) Title of the invention

, .Wheel drive, especially for slewing crane with. Großwälzlager-

b) Field of application of the invention

The invention relates to a controllable slewing gear drive on an electromotive basis, in which a pivoting or rotational movement about an axis is required, in particular for slewing cranes with a slewing bearing between the fixed lower part and the rotatable upper part «Rotational movement around an axis can be freely stationary or« mobile «. The invention is also applicable to slewing cranes with block columns, as well as to excavators and construction machinery.«

c.) Characteristic of the known technical solutions

Pan "or" rotational movements of the upper part relative to a fixed lower part are in rotation ^"(cranes of all types such as cars and mobile cranes, harbor cranes, crawler cranes and other material handling equipment such as excavators, Construction etc carry ₀ · The rotational movement is one of the fulfillment Working frequency, eg B _{0 of} the handling process for overhead cranes, important form of gripping motion ff

Rotary actuators are known for rotary cranes, in which the rotational movement is brought about by an electret or diesel engine in conjunction with a transmission, a clutch and a braking device. The relative movement between the rotatable upper part and the fixed lower part is via a pinion, which with a ring gear of a large Obtained see: Basics of Conveyors ehnik, VSB Verlag Technik, S · 134-ff The main shortcomings of this type of drive are zvaschen 'high gear wear sprocket and ring gear on the one hand and the large number of directly in the mechanical Engaging elements, such. This results in a limited service life of the drive And high costs for ensuring the operability and maintenance of function · In addition, the efficiency for transmitting the required torque, due to the high number required -Iieher intermediate elements, such as pinion, gearbox, clutch, low and thus the energy consumption by energy losses high · In addition, the controllability and adaptability of this drive for the particular application requires a high cost *

Also known is a drive for «cable and cable drums, discs or other rotary bodies, in which the drive is based on the principle of the linear motor« Here, the movable part of the motor is arranged on the circumference or near the circumference of the rotary body · The stationary part of the motor is in the form of one or more fixedly arranged to the axis of rotation stator · see: DE-OS 2058 803 and

DD-IP 90853

Furthermore, an electric drive for lifting equipment and funding is known in which to achieve a disk drive on the circumference of a drive pulley, a stator is arranged as a linear motor _β see: DS ^ -OS 2233 593 These types of drives have the disadvantage that they do not form a compact closed unit are formed with a ball or roller slewing connection, require very complex construction forms for securing a constant air gap between the primary part and the secondary part and orientate on conventional slewing drive forms such as, B »rotary rolls» drive shaft wreaths, which in terms of running properties, wear, life and repair and maintenance costs have significantly worse performance characteristics than those with slewing bearings «

d) Object of the invention

The aim of the invention is to significantly reduce the effort and tree requirements for the realization of a controllable slewing drive and eliminate the wear completely »It should be given the opportunity to significantly increase the degree of standardization and durability and the drive as a compact unit in conjunction with the structural element To design slewing bearings ·

e) Presentation of the essence of the invention

The object is to make a direct-acting slewing drive for the realization of a rotary motion without rotor-driven elements and intermediate power transmission elements »The constructive solution so ^ .1 a

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enable cost-effective, well-regulated as well as an energy-economical and modern drive design based on electronic and microelectronic components and ensure adaptability to all required rotational speeds and power, components on any drive designs and for any drive forces. At the same time, the advantages with regard to the running characteristics of a slewing bearing should have a positive effect on the initial design of the crane and on the performance properties of the products. "" The space requirement for the drive should be reduced by a compact design.

According to the invention, in a slewing gear drive of a slewing crane or the like, a ring of a large rolling bearing consisting of a plurality of rings is fixedly connected to a secondary part. The secondary part is influenced by a primary part, which may be a linear motor or a winding module. Bine supporting structure, which is at the same time magnetic reflux The relative movement of the rings of the large rolling bearing against each other is achieved by a force component of a known linear motor or a winding module as a result of the forming linear migration field. The primary part can "depending on The arrangement can be carried out inside and outside of the large rolling bearing · The primary part can be designed in single or double stator design, the execution itself in borizpntaler or vertical plane is particularly useful when the windings of _; Primary part directly in one of the rings (nose ring) of the

· It is also possible to arrange the windings of the primary part as winding components in the receptacles provided for this purpose «

The required constant air gap A L between the secondary and primary part is to be secured by appropriate measures on the large rolling bearing · Depending on the size of the torque to be achieved several primary parts (Iiinearmotore) arranged one behind the other or in a ring of the large rolling bearing any winding units are used · It exists also the possibility that on the upper and lower Hing of the large roller bearing oppositely acting primary parts are attached · This can be a higher driving force to be secured, «The slewing bearings themselves can be single-row or multi-row as ball, wire or roller bearings *

The deceleration is carried out directly by countercurrent up to a certain limit of the rotational speed and then by the excitation of the primary 'part with DC as DC braking · Thus, a braking force proportional to the rotational speed is achieved ·.

The electrical control of the drive can be done in pulsed mode *

Other embodiments of the slewing drive are quite possible while maintaining the principle of the invention. "With the slewing drive according to the invention, both the acceleration and the braking phase can be optimally designed in terms of energy economics." The plague position of the rotatable upper part in a certain position or upon realization required for rotating cranes of a particular

Angle of rotation can be realized with little effort by known means «, ν

The slewing drive operates without rotor components such as gear ₉ gears, pinions / clutches, is infinitely variable, requires small tree, has a high reliability and durability «The energy efficiency is significantly improved, the effort for the control and regulation des.Antriebes and space requirements is small. It is particularly advantageous that a closed compact drive is achieved by the proposed solution, the integrating component universally applicable and allows a material-economic design of the products with minimal space requirement »

f) embodiments

The invention will be explained in more detail below with reference to several exemplary embodiments. Bs shows:

Figo 1 A slewing drive in Doppelstatorausführung outside on a provided with two rows of balls slewing bearings

2 A slewing gear drive in double stator design on the inside of a large rolling bearing bearing two rows of balls

3 A slewing gear drive in single-stator design on the outside of a large rolling bearing bearing two rows of balls

Fig. 4 a slewing drive in Einfachstatorausführung inside on a provided with two Kugelrethen slewing bearings

Fig, "5 a slewing drive in single stator" execution hanging on a provided with two rows of balls slewing bearings

Fig. 6 A Drehwsrksantrieb in JSinfachstatorausfiihrung outside on a provided with a row of balls slewing bearings

Fig. 7 A DrehwerksantriöD in Einfachstatorausführung laterally on a provided with a row of balls slewing bearings

Fig. S A slewing drive in Doppelstatorausführung above on a provided with a row of balls slewing bearings

Fig. 9 The plan view of a slewing drive for rotary cranes in block column design using a disk construction

Figure _# 1O is a section through a turning drive for cranes in block column design when using a disc-type

FIG. 11 shows a section through a large rolling bearing provided with two rows of balls with a winding component arranged in the nose ring. FIG

12 shows a section through a provided with three rows of rollers slewing bearings with arranged in the nose ring winding block

~ 8

Figures 1 and 2 show slewing drives in Doppelstatorausführung the primary parts 1 for an arrangement outside and within the large rolling rs «, the primary parts 1 with support structures 3» which simultaneously serve as magnetic inference, firmly connected · between the support ring 12 and retaining ring of the large rolling bearing fixed to the nose ring 11, the secondary part 2 * Thus, the required constant LuftspaltAI »secured between primary 1 and secondary 2 The support structures 3 for the magnetic yoke can be adapted to the specific requirements of the slewing drive.

Figures 3> 4 and 5 show slewing drives in single-bay stator design of the primary parts 1 suspended with an arrangement outside and inside the large-diameter rolling bearing.

Figures 6, 7 and 8 show arrangements of the primary parts 1 in single or * Doppelstatorausführung with a single-row large roller bearing * Figures 9 and 10 show a slewing drive in rotary cranes in block column design using a disk design _e The primary parts 1 can be a single or double stator the circumference are distributed according to the required torque; The primary parts 1 are attached to the support ring 5. The necessary for supporting the column 6 rotary castors V are based on the running rail 4 from. Due to deformations of the column 6 occur in operation constantly changing air gaps A L, resulting in a constant change in the angle of inclination

Pillar 6 in relation to an ideal vertical axis * Compensating for additional measures involves a great deal of effort and

.. ·. ... .. - · 9.-,. ''.

11 and 12 show special compact designs of a slewing gear drive · The windings of the primary part 1 necessary for generating the torque are incorporated directly into the nose ring 11 of the large rolling bearing provided with two rows of balls or rows or as a winding module fixedly connected to the nose ring 11. The support structure, which simultaneously serves as magnetic reflux, is fixedly connected to the retaining ring 10 which contains the secondary part 2. This simultaneously ensures the constant air gap ΔL The support structures 8, 9 on the rotatable upper part or on the fixed lower part of the slewing crane are to be designed product specific. Depending on the requirement, sealing elements 13 and 15 can be used for a clean seal. The current is supplied via the current connection 14.

FIG. 12 shows the analogous application of the slew drive according to the invention in a slewing bearing with bolls.

With this slewing drive in a compact design, the large rolling bearing is designed as a self-acting slewing drive group and thereby offers special advantages in terms of the required tree requirements, reliability and service life These advantages can be implemented directly in a modern construction concept of a slewing crane or excavator ·

Claims (5)

AC invention claims 1. Slewing drive on electromotive basis, in particular for slewing cranes of all types for realizing a pivoting movement about a vertical axis between the fixed lower part and the rotatable upper part, between which a large rolling bearing is located, characterized in that an inlet (10) of the Large rolling bearing with a secondary part (2) is firmly connected, which is influenced by a primary part (1) of a known linear motor or a winding module by a magnetic field and a supporting structure (3) t which is at the same time magnetic reflux, as a receiving and connecting element of the primary part (1) with a further ring (11) of the slewing bearing is arranged » 2, slew drive according to item 1, characterized in that the primary part (1) is arranged in single or double stator design in a horizontal / vertical plane » 3 · Slewing drive according to items 1 and 2 marked * ' characterized in that the windings of the Primärfceils (1) and the secondary part (2) are embedded directly in each one of the rings of the slewing bearing, 4. Slewing drive according to item 1, 2 and 3, characterized in that the windings of the primary part (1) are arranged as winding components in exchangeable receptacles provided for this « - 5 sheets of drawings -