ES2378634B2 - PROCEDURE FOR IMPROVING THE PERFORMANCE OF THE OPERATION OF EXISTING MACHINES DRIVED THROUGH TOOTHED PINION-CROWN AND DRIVE SYSTEM. - Google Patents

Abstract

Procedure for improving the performance of the drive of existing machines that are driven by a pinion-toothed crown and drive system, comprising the steps of: # - Disassemble at least the electric motor and the pinion, keeping the toothed crown fixed to the Existing machine, # - Mount magnetic means complementary to the toothed crown gear on the gearwheel, # - Subsequently mount on the magnetic means a housing that will contain a conventional electric stator concentric to the gearwheel, # thus obtaining a drive system an existing machine to which the pinion and electric motor for driving the toothed crown has been dismantled, which comprises magnetic means complementary to the teeth of the toothed crown and an electric stator concentric to the toothed crown.

Description

PROCEDURE FOR IMPROVING THE PERFORMANCE OF THE DRIVING OF EXISTING MACHINES OPERATED THROUGH PIÑON-CORONA DENTADA AND

DRIVING SYSTEM

Field of the Invention

The present invention falls within the field of electromechanical systems, and more specifically, in very low speed machine drive systems comprising a pinion-crown gear set and an electric motor, which may also comprise a reducer. Background of the invention

Very low speed machines are machines with a speed much lower than that of commercial electric motors, this is below 750 rpm 3000 rpm.

Traditionally, in the drive systems of very low speed machines, electric machines with a much higher speed of rotation are needed, which need reducers that attack a cogwheel pinion in solidarity with the low speed driven machine. This method of transmission, having moving parts that rub against each other, means a very important loss of energy as well as high maintenance.

DE102006020149 describes a rotary synchronous machine, comprising a rotor with projecting axial poles, which rotates around the axis of a stator. Description of the invention

The invention relates to a process for improving the performance of very low speed machines driven at least by a gear-pinion-crown assembly and an electric motor.

The procedure includes the steps of: - Disassemble at least the electric motor and the pinion, keeping the gear ring fixed to the existing machine,

-

Install one of the types of electric rotor on the cogwheel, either with winding poles, squirrel cage or permanent magnets. To implement these typologies, the following will be installed: magnetic means complementary to the toothed crown gear selected from:

or a plurality of complementary pieces that each comprise on one of its faces a tooth complementary to the teeth of the crown and on the other side at least one magnet, forming a

existing crown set, additional parts and permanent magnets, or

or a magnetic package configured to implement a squirrel cage rotor, forming an existing crown assembly, additional magnetic package and rotary winding, or

or a plurality of complementary pieces that each comprise on one of its faces a tooth complementary to the crown teeth and on the other side at least one winding pole, forming an existing crown assembly, additional parts and winding poles.

-

Subsequently mount an electric stator, concentric to the toothed crown-electric rotor assembly, which comprises the same number of pairs of poles as the new electric rotor implemented,

in such a way that the existing machine itself with the crown gear set and the new installed parts act as an electric rotor and together with the new stator form the direct drive electric motor, eliminating the pinion and the possible reducer.

This procedure allows to significantly improve the overall performance of the machine drive, as well as reduce maintenance, since it is possible to eliminate the pinion and the gearbox, if any, and act directly on the machine to be operated. Brief description of the drawings

A series of drawings that help to better understand the invention and that expressly relate to an embodiment of said invention which is presented as a non-limiting example thereof is described very briefly below.

Figure 1 shows a conventional drive system of a very low speed machine such as ball mills for mineral grinding, with reducer.

Figure 2 shows the solution in which the motor used for the drive is of such a speed that only the pinion-toothed crown assembly is needed.

Figure 3 shows a preferred embodiment of complementary coupling piece on the gear ring of the existing machine. Figure 4 shows a second preferred embodiment of part

Complementary coupling with a grip pin on the gear ring of the existing machine.

Figure 5 shows a third preferred embodiment of complementary coupling piece with two grip pins on the toothed crown of the existing machine.

Figure 6 shows a perspective view of the machine with the complementary crown assembly and permanent magnets

Figure 7 shows a perspective view of the machine with the electric stator and the electric rotor formed by the ball mill, the toothed crown and the complementary toothed crown.

In the aforementioned figures, a series of references are identified that correspond to the elements indicated below, without implying any limiting character:

1.-ball mill

2.-crown gear

3.-pinion

4.-reducer

5.-engine

6.-bearings on which the mill rotates

7.-electric motor

8.-permanent magnets

9.-single coupling piece

10.-coupling piece with L-profile

11.-coupling piece with U-profile

12.-complementary crown-set of permanent magnets

13.-grip pins Detailed description of an embodiment As can be seen in Figures 3-6, the process of the invention allows to improve the performance of machines such as ball mills (1) on which they are fixed in its perimeter a toothed crown (2) which, in conventional machines, is driven by a pinion (3) driven by an electric motor (7) and, optionally, a reducer (4) (figures 1-2). The process of the invention comprises the steps of eliminating the pinion (3) and the electric motor (5) that drive the rotation of the crown gear (2), to insert a plurality of complementary coupling parts (9, 10, 11) to give rise to a

complementary crown-set and permanent magnets (12). The coupling pieces (9, 10, 11) are pieces that comprise a tooth complementary to the teeth of the existing crown (2) on one side and at least one permanent magnet (8) on the other side, to create the field magnetic rotor

5 (said magnets can be replaced by winding poles), optionally having one or two grip pins (13) forming a complementary coupling piece with an L-shaped profile (10) or a U-shaped (11).

The complementary pieces are schematic illustrations of preferred embodiments without the intention of excluding any other design that performs the same function.

Claims (3)

1.- Procedure for improving the performance of the drive of existing machines that are driven at least by a gear-pinion-gear set and an electric motor, characterized by comprising the steps of:

-

Dismantle at least the electric motor and the pinion, keeping the gear ring fixed to the existing machine,

-

Mount a plurality of complementary pieces on the toothed crown, each comprising one tooth on one side complementary to the crown teeth and on the other side at least one magnet, forming a crown gear-complementary piece and magnet assembly.

-

Subsequently mount a housing containing a conventional electric stator concentric to the crown gear on the magnetic means.

2. Method according to claim 1 characterized in that the magnetic means are a magnetic package and a rotary winding in the form of a squirrel cage. 3. Method according to claim 1 characterized in that the magnetic means are a magnetic package and a plurality of poles with DC windings. 4.- Drive system for existing machines driven by a toothed crown fixed to the machine to which the pinion and electric motor for driving the toothed crown has been removed, characterized in that it comprises:

-

a plurality of complementary pieces that each comprise on one of its faces a tooth complementary to the teeth of the crown and on the other side at least one magnet, forming a crown set of complementary teeth and magnet.

-

an electric stator concentric to the crown gear 5. System according to claim 4 characterized in that the magnetic means are a magnetic package and a rotary winding in the form of a squirrel cage. 6. System according to claim 4 characterized in that the magnetic means are a magnetic package and a plurality of poles with DC windings.

 Fig. 1    Fig. 2    Fig. 3    Fig. 4    Fig. 5 8    Fig. 6    Fig. 7   SPANISH OFFICE OF THE PATENTS AND BRAND Application number: 201131514 SPAIN Date of submission of the application: 09.20.2011 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: See Additional Sheet RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

Y

US 2010033035 A (SIEMENS, A.G.) 11.02.2010, paragraphs [0026] - [0029], [0046] - [0052]. 1,3,4,5,7,8

TO

2.6

Y

US 1224933 A (WALTER G SWART; JORDAN FRED ALLEN) 08.05.1917, the whole document. 1,3,4,5,7,8

TO

2.6

TO

US 3272444 A (GEN ELECTRIC) 13.09.1966, column 3, lines 30-65; figures. 1-8

TO

US 3903439 A (SMIDTH & CO AS F L) 02.09.1975, column 3, lines 15-53; figures. 1-8

TO

US 2003094524 A1 (GEN ELECTRIC CANADA) 22.05.2003, paragraph [0010]; Figure 1. 1-8

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 22.03.2012

Examiner L. J. García Aparicio Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 201131514 CLASSIFICATION OBJECT OF THE APPLICATION B02C17 / 24 (2006.01) H02K1 / 27 (2006.01) H02K7 / 14 (2006.01) Minimum documentation sought (classification system followed by classification symbols) B02C, H02K Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENTIONS, EPODOC State of the Art Report Page 2/4  WRITTEN OPINION Application number: 201131514 Date of Written Opinion: 22.03.2012 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 1-8 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 2.6 1,3,4,5,7,8 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 201131514 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

US 2010033035 A (SIEMENS, A.G.) 11.02.2010

D02

US 1224933 A (WALTER G SWART; JORDAN FRED ALLEN) 08.05.1917

D03

US 3272444 A (GEN ELECTRIC) 13.09.1966

D04

US 3903439 A (SMIDTH & CO AS F L) 02.09.1975

D05

US 2003094524 A1 (GEN ELECTRIC CANADA) 05/22/2003

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement Any of the documents cited, D1 to D5, are based on the same principles of the invention. All the documents cited and the invention seek to convert the mill's own drum into a rotor of a machine, externally disposing the toothed crown that is disposed on the drum, such a stator that the rotor is rotated (ie of the drum) by interaction of the electromagnetic forces. Regarding the procedural claims, indicate that although the stages as such are not disclosed in the documents, they are implicit to reach the drive system. In document D1, which can be considered close to the object of the invention, the operation of the mill drum through its toothed crown is achieved by a stator that has excitation means based on windings and permanent magnets arranged on the stator (figure 5). The matter of claim one differs from that disclosed in D1, in that while in the first claim the complementary magnetic means are arranged on the teeth of the toothed crown, in D1 they are arranged in the stator. Since what is sought is the magnetic interaction between both parties, the arrangement in the stator or in the rotor of the magnetic interaction means would be evident to a person skilled in the art. In fact, this is recognized in D2 (page 2, lines 18-36, page 1, lines 59-62). Therefore, the first claim lacks Inventive Activity, as set forth in Article 8.1 of LP 11/86. Now, the matter of claim two wherein it is claimed that the complementary magnetic means disposed on the rotor are arranged on complementary pieces comprising on one side a tooth complementary to the crown teeth, and on the other side at least a magnet, so that a set of complementary crown-toothed crown and magnet is formed, is not disclosed in any of the cited documents. Regarding claim three, it is not clear which would be the magnetic package that would form the complementary magnetic medium. Document D1, and also D2, discloses the provision of complementary magnetic means to form an asynchronous motor. Therefore, the subject matter of this claim lacks Inventive Activity as set forth in Article 8.1 of LP 11/86. In document D2 the possibility of arranging a plurality of poles with direct current windings is disclosed, therefore, the matter of claim 4 lacks inventive activity as set forth in Art. 8.1 of LP 11/86. Regarding the system claims, the same considerations are made as in the procedural ones. Therefore, the matter of claim 5 would lack inventive activity resulting from the combination of documents D1 and D2, as in claims 7, 8. Similar considerations can be made as a result of the combination of any of documents D3, D4 and D5 with D2. Only, in principle, it would have novelty and inventive activity, as established in Articles 6.1 and 8.1 of LP11 / 86, the subject of claims 2 to 6, which basically claim the same subject, which is the use of a complementary piece that in one of its faces has a complementary teeth to the crown teeth, while in the other side it has at least one magnet, which would result in an improvement of the machine's performance, as well as reducing its maintenance. State of the Art Report Page 4/4