WO2012143580A1 - Motor-securing system - Google Patents

Abstract

The present invention relates to a system for securing a motor to the casing of a fan in the roofs of road tunnels, comprising a B30-type motor (3) including 8 radially- and longitudinally-distributed securing elements, with 4 angularly equidistant securing elements being located in the front portion of the motor (3) and 4 angularly equidistant securing elements being located in the rear portion of the motor (3), the casing (1) being provided with 8 perforations. The invention also comprises 8 adjustable tensioning members (4, 5) which are connected at one end to the securing elements of the motor (3) and, at the opposite end, to the casing (1) by means of the aforementioned perforations.

Description

 MOTOR GRIPPING SYSTEM

 OBJECT OF THE INVENTION

 The present invention, as expressed in the statement of this specification refers to a mooring system of a motor specially designed for mooring to the inner face of the fan housing. Said fan is intended for installation inside tunnels of roadways for their ventilation. In order to achieve the stated objective, the system comprises a series of adjustable tensioners which, through mechanical joints, achieve a firm connection of the motor to the fan housing by reducing the weight and avoiding being an obstacle to the passage of air through the housing.

 BACKGROUND OF THE INVENTION

In the known state of the art, the housings were manufactured with a motor support welded to the outer shell thereof. This motor support could be welded primarily in two positions, in the upper area or in the lower area of the housing. This type of construction caused an oval in the housing due to the weight of the motor and of the support since all this weight was held by a small portion of the housing. In addition, the lack of rigidity of the support caused vibrations in the structure due to, in addition to the poor rigidity of the mentioned motor support, to the small joint surface between said support and the housing. Even when the oval was considerable enough, it could cause the blades of the impeller to rub against the housing envelope with the consequent problems that they entail, such as the destruction of the casing and the impeller or greater friction and therefore higher power consumption and lower fan performance.

 The fixing between the housing and the motor support is carried out conventionally by means of welded cords. In this type of constructive solution, each of the parts that made up the clamping system, outer casing, motor support and welds were resistant elements, being unable to eliminate or lighten any without affecting the rest.

 In addition to the mechanical problems of this constructive solution, it also generated aerodynamic problems. The engine support produced a significant aerodynamic obstacle in the passage of air in both directions. The construction of the support itself, forced it to be welded radially to the housing in the longitudinal direction, which caused interference in the direction of rotation of the air jet, thereby causing turbulence, which decreased the performance of the fan.

 Another well-known constructive solution is the inclusion of engine mounts that have the shape of the rotor blades. These blades are welded to the motor and to the housing envelope. Although this solution reduces the problems of instabilities generated by the existence of obstacles in the passage of air, it represents, on the one hand, a significant obstacle to the passage of air since these fixed blades are in the entire air passage and also generate a considerable increased weight of the fan that has an impact on the need to provide the fan with much more robust fastening systems.

The mooring system described in this application solves the problems described above, specifically solves both the mechanical and aerodynamic problems mentioned.

 The present invention, due to a better distribution of the charges inside the fan housing allows the reduction of the amount of material in the manufacture of all the parts that make up the housing, moreover, converts the outer envelope into an element mainly "container", being able to significantly reduce its thickness and obtaining, therefore, a significant reduction of material used for its manufacture. The disappearance of the motor support as such greatly reduces the weight of the invention. In addition, its disappearance implies the disappearance of the aerodynamic problems generated since the tensioners used in the present invention are small enough so that the instabilities generated by them in the air jet are negligible and do not affect the performance of the fan.

 DESCRIPTION OF THE INVENTION

In order to achieve the objectives and avoid the drawbacks indicated above, the invention consists of a mooring system of the motor to the fan housing comprising at least 8 berths, at least 4 of which are inclined berths. These moorings will preferably be adjustable tensioners that will allow the perfect centering of the motor in the fan housing and at the same time the elimination of the motor support, which has a great aerodynamic impact and generates instabilities in the output current of the air that moves the impeller mentioned fan. This ensures that the air flow generated by the fan is clean both ways and without interference. it makes the turbulence generated in the air jet minimal and therefore the aerodynamic efficiency is improved and the fan's electrical consumption is reduced while the thrust is improved.

 Thus, the mooring system of the present application is intended for the attachment and mooring of motors located inside the housing of a fan, these fans being specially designed to be installed in tunnel roofs of rolled tracks. The system object of the invention comprises mooring a motor of type B30 or "pad mounting" that has 8 moorings distributed radially and longitudinally with 4 of the angularly equidistant moorings located at the front of the motor, at angular distances of 90 °, and with 4 angularly equidistant moorings located at the rear of the engine, at angular distances of 90 °.

 The fan housing will comprise 8 perforations to accommodate one of the ends of each of the tensioners. Said perforations will be angularly equidistant from four to four in two transverse cuts of the housing and in the same way they will each be separated by angular spaces of 90 °.

 Thus, the present invention will comprise 8 adjustable tensioners that are attached at one end to the moorings of the motor and at its opposite end to the housing through the perforations made, 4 of these adjustable tensioners being inclined tensioners. The other 4 adjustable tensioners will be selected from 4 straight tensioners and 4 inclined tensioners.

In an embodiment of the invention when there are 4 inclined tensioners and 4 straight tensioners, the tensioners are arranged in a form selected from: • the 4 inclined tensioners at the front of the engine and the 4 straight tensioners at the rear of the engine;

 • the 4 straight tensioners at the front of the engine and the 4 inclined tensioners at the rear of the engine;

 • 2 straight tensioners and 2 inclined tensioners at the front of the engine and 2 straight tensioners and 2 inclined tensioners at the rear of the engine all located in the form of opposite pairs;

the tensioners can be inclined in any of the described arrangements with an inclination selected between an inclination towards the center of the housing and an inclination towards the outside of the housing and there being always a straight tensioner and one inclined in each of the 4 longitudinal planes of the engine where the moorings are located.

 When there are 8 inclined tensioners, the 4 tensioners on the front of the motor will be inclined opposite to the 4 inclined tensioners on the rear of the motor.

 Thus, and depending on the different possible embodiments, there will always be 2 or 4 straight tensioners at the front of the engine and 2 or 4 inclined tensioners at the rear of the engine, except in cases where the 8 tensioners are tilted. When there is a mixed tensioner configuration, that is, when there are two straight and two inclined tensioners on the front or rear of the motor, these will be placed in opposite pairs to better compensate for the thrust generated by the motor.

Straight tensioners provide greater robustness when mooring the engine while inclined tensioners provide better absorption of engine thrust so that the combination of both types of tensioners improves mooring performance. Thus, in the most preferred embodiment, the installation of two straight and two inclined tensioners is provided in the front part of the motor, placed in opposite pairs and two straight tensioners and two inclined tensioners, in the rear part of the motor, located in the part rear of the engine In addition, said tensioners will be positioned so that a straight tensioner inclined from the rear part in the same longitudinal mooring plane corresponds to a straight tensioner in the front part of the motor. With this arrangement of the tensioners the absorption of forces is maximized while the mooring is sufficiently robust.

 In a preferred embodiment of the invention, the fan housing comprises having welded on its outer face at least 4 omegas profiles along the width of the housing. Each omega profile is welded on the line that establishes each pair of perforations, one corresponding to a front tensioner and another to a rear tensioner. Each omega profile comprises at least two perforations in each of which a bushing has been welded to give greater strength to the subsequent fixing of the tensioner. In addition, the four omega profiles will be arranged so that the perforations made in them coincide with those made in the housing so that the ends of the tensioners pass through the housing and the profiles and are fixed through the mentioned omega profiles giving it greater robustness to fixation. The profiles also provide greater structural strength to the housing.

In another preferred embodiment of the invention, the straight tensioners comprise a straight threaded rod that is secured at one end to the mooring of the motor by means of a nut and a locknut and which is secured by the opposite end of the threaded rod to the housing by means of a nut on the external face of the housing, more specifically on the external face of the corresponding omega profile, and one with a locknut on the internal face of the housing.

 In another preferred embodiment of the invention, the inclined tensioners comprise being designed in three sections. A first section is a straight threaded bar that articulates with respect to a second section at one of its ends and that joins the carcass at the non-articulated end by means of a nut on the outer face of the carcass and by means of a locknut on the face internal housing. A second straight section that articulates at both ends with respect to the first threaded section and with respect to a third threaded section. And a third threaded section that joins the engine mooring by means of a nut and a locknut at the end that does not articulate and articulates with respect to the second section at the other end.

In another preferred embodiment of the invention, the articulated ends of the first and third section will be flattened and will have a threaded through hole to fit in a fork located at each of the articulated ends of the second section. In addition, the articulated ends of the second section will comprise a fork with a threaded through hole where each of the flattened sections of the first and third sections are introduced and through which a threaded stud is inserted for total joint fixation. These studs that are used to fix the joints will be fixed to said joint by means of a nut and a locknut located one on each side of the fork. BRIEF DESCRIPTION OF THE FIGURES

 Figure 1.- Shows a general view of the invention with the tensioners distributed in one of the possible embodiments of the invention.

 Figure 2.- Shows a detailed view of a straight tensioner.

 Figure 3.- Shows a detailed view of an inclined tensioner.

 Figure 4.- Shows a view of an omega profile like those used in the present invention.

 Figure 5.- It shows a section of the omega profile where the bushes are shown through which the tensioners are fixed to the outside of the housing envelope.

 Figure 6.- Shows a detailed view of the connection of the tensioners to the motor and to the housing through the omega profiles.

 DESCRIPTION OF VARIOUS EXAMPLES OF REALIZATION OF THE

INVENTION

 Next, a description of several embodiments of the invention is made, by way of illustration and not limitation, with reference to the numbering adopted in the figures.

Figure 1 shows a first embodiment of the invention. Note that the arrangement of the tensioners is only one of the possible embodiments and may be placed in any other arrangement provided that in each of the 4 clamping planes (the clamping plane being understood as the plane formed by each pair of tensors that join the same omega profile (2)) there is a straight tensioner (4) and one inclined (5) or two inclined tensioners (5). In said figure 1 the housing (1) is shown, to which the 4 profiles have been welded omega (2) in each of the 4 clamping planes, to which the motor (3) is tied by 8 adjustable tensioners (4,5). Said tensioners (4,5) are positioned such that in the front part of the motor (3) there are two straight tensioners (4) and two inclined tensioners (5) and in the rear part of the motor (3) there are two straight tensioners ( 4) and two inclined tensioners (5). All of them are placed in opposite pairs. In addition, the inclined tensioners (5) are inclined towards the central part of the housing (1). In other possible embodiments, the inclined tensioners (5) may be inclined towards the outside of the housing (1). As can be seen from figure 1, the tensioners (4,5) are joined to the motor (3) by means of a threaded joint (6) and to the housing (1) are joined through holes made in the housing itself (1) and in the omega profiles (2) and are fastened by nuts (7) placed on the outer face of the omega profiles (2).

 Figure 2 shows a straight profile (4) in detail. Said profile comprises being a threaded bar (the thread is not shown in the figure) which has at the end that joins the motor (3) a lock nut (9) to ensure the threading of the threaded joints (6). At the opposite end, the straight tensioner comprises a locknut (8) to ensure the union on the inner face of the housing (1) and a nut (7) on the outer face of the omega profile (2). Due to the threading of the entire straight tensioner (4), the diameter of the housing can be adjusted by simply moving the nut (7) and locknut (8) through said tensioner (4).

Figure 3 shows an inclined profile (5) in detail. Said profile comprises 3 sections (14,15,16). The central section (14) is smooth and at each of its ends it has a fork (10) for securing the other - io two extreme sections (15,16) allowing their tilting. The two end sections (15,16) are threaded (note that the thread is not shown in the figure) presenting at the ends in contact with the fork (10) flaps (11) to be introduced into the forks (10). Both the forks (10) and the flaps (11) have a through hole through which a stud (12) is introduced to fix the sections (14,15,16) of the inclined tensioner (5) to each other. The stud is fixed by a nut (13) and a locknut (the locknut is not shown in the figures). In the same way as the straight tensioner (4), the inclined tensioner (5) has on the end section (15) that joins the motor (3) by threading, a locknut (9) to ensure the threading of the threaded joints (6). On the opposite end section (16), the inclined tensioner (5) comprises a locknut (8) to secure the connection on the inner face of the housing (1) and a nut (7) on the outer face of the omega profile (2) ). Due to the threading of the two end sections (15,16) of the tensioner (5), the diameter of the housing (1) can be adjusted by simply moving the nut (7) and locknut (8) through said end sections (15, 16).

Figures 4 and 5 show the view of an omega profile and its longitudinal section. Specifically, Figure 4 shows an omega profile (2) to which two perforations (18) have been made in the upper face to pass the threaded ends of the tensioners (4,5) through them and secure them by nuts on said face External profile. The omegas profiles have the ends adapted to the shape of the housing to which they are welded, the one shown in this figure being one of the possible embodiments. The figure shows the omega (2) profile welded to - Il the housing both for its lower face and for its ends. In the perforations (18) welded bushes (19) are introduced to reinforce the union of the tensioners (4,5) to the housing (1) and stiffen the structure.

 Figure 6 shows the joining of the tensioners (4,5) to the housing (1) and the motor (3) in detail, the housing being in turn connected to noise dampers (20).

Claims

1.- Mooring system of an engine located inside the housing of a fan to be installed in roofs of tunnels of rolling tracks, characterized in that it comprises a type B30 engine that has 8 moorings distributed radially and longitudinally with 4 of the angularly equidistant moorings located at the front of the engine and with 4 angularly equidistant moorings located at the rear of the motor, the housing comprising 8 perforations being positioned angularly equidistant from four to four in two transverse cuts of the housing, and comprises 8 tensioners adjustable that are joined by one of its ends to the moorings of the engine and by its opposite end to the housing through the perforations made, 4 of these adjustable tensioners, inclined tensioners, and the other 4 adjustable tensioners being selected from 4 tensioners straight and 4 inclined tensioners. 2. Mooring system of an engine, according to claim 1, characterized in that when there are 4 inclined tensioners and 4 straight tensioners, the tensioners are arranged in a way selected from:  • the 4 inclined tensioners at the front of the engine and the 4 straight tensioners at the rear of the engine;  • the 4 straight tensioners at the front of the engine and the 4 inclined tensioners at the rear of the engine; • 2 straight tensioners and 2 inclined tensioners on the front of the engine and 2 straight tensioners and 2 inclined tensioners at the rear of the engine all located in the form of opposite pairs; the tensioners can be inclined in any of the described arrangements with an inclination selected between an inclination towards the center of the housing and an inclination towards the outside of the housing and there being always a straight tensioner and one inclined in each of the 4 longitudinal planes of the engine where the moorings are located. 3. - Mooring system of an engine, according to claim 1, characterized in that when there are 8 inclined tensioners, the 4 tensioners of the front part of the motor are inclined opposite to the 4 inclined tensioners of the rear part of the motor. 4. - Mooring system of an engine, according to claim 1, characterized in that the housing comprises having welded on its external face at least 4 omegas profiles, each of which comprises at least two perforations in each of which has been welded a bushing, arranged the at least 4 omega profiles so that the perforations coincide with those made in the housing so that the tensioners pass and are fixed to the housing through the omega profiles giving greater strength to the fixation. 5. - Mooring system of an engine, according to any one of claims 2, characterized in that the straight tensioners comprise a straight threaded bar that is secured at one end to the mooring of the motor by means of a nut and a locknut and which is secured by the opposite end of the threaded rod to the housing by means of a nut on the outer face of the housing and one with a locknut on the inner face of the housing. 6. Mooring system of a motor, according to claim 1, characterized in that the inclined tensioners comprise a first section of threaded bar that articulates with respect to a second section and that joins the housing at the non-articulated end by means of a nut on the outer face of the carcass and by means of a locknut on the inner face of the carcass, a second section that articulates at both ends with respect to the first threaded section and with respect to a third threaded section and a third threaded section that joins the mooring of the motor by means of a nut and a locknut at the end that does not articulate. 7. Mooring system of an engine, according to claim 6, characterized in that the articulated ends of the first and third section comprise being flattened and having a threaded through hole to fit in a fork located in each of the articulated ends of the second section. . 8. Mooring system of an engine, according to claim 7, characterized in that the forks of the articulated ends of the second section comprise a threaded through hole where each of the flattened sections of the first and third section are introduced and through the which introduces a threaded stud to fix the joint. 9. Mooring system of an engine, according to claim 8, characterized in that the studs that fix the joints are fixed to the joint by means of a nut and a locknut located one on each side of the fork.