MXPA96000150A - I saw. SYSTEM OF BEARING PROTECTION IN MOTOR GENERATOR OF VA - Google Patents

Abstract

A bearing protection system of a vacuum generator engine includes a barrier wall interposed between a motor unit and a fan unit. An arrow interconnecting the units is received rotatably within a bearing received by the barrier wall. To prevent the humidity and debris from attacking the bearing, openings are placed in the upper plate of the fan unit, which are closer to the bearing and in juxtaposition with it, to extract the air out of the bearing and into the eye from the fan. In accordance with the above, this depuration action extracts any moisture and debris from the bearing area. To assist in the pumping action, the barrier wall, the fan top plate, or a separator interposed therebetween, may be provided with fins positioned and configured to direct moisture-laden air toward the openings in the upper fan plate and towards the vent hole

Description

BEARING PROTECTION SYSTEM. IN VACUUM GENERATOR GENERATOR TECHNICAL FIELD The invention described herein falls in the technical field of vacuum generating engines and, more particularly, those of the type used in spray jet extractors, such as carpet cleaners and the like. Specifically, the invention relates to vacuum generating engines that use means to protect the bearing or bearing from the fan / motor shaft, against effluents such as: water, soap, foam, or the like.

BACKGROUND OF THE ART It is now well known to use extractors with spray jets for cleaning carpets and the like. These spray jet extractors normally use a motor that is kept inside a motor housing, and that has an arrow that passes from there, through a barrier wall, to a fan that is kept inside a fan housing . Normally within the barrier wall an appropriate bearing or bearing is maintained to receive the arrow which interconnects the motor and the fan. The fan generates a vacuum to extract P1028 / 96MX the humidity and dirt of the carpet, inside the chamber that receives the fan is present an atmosphere of air, water, detergent, and foam, laden with dirt. The bearing of the arrow is maintained within the wall that separates the fan and motor housings, the bearing is in close proximity to this environment and, absent of means to protect or isolate the bearing from the environment. It is often subjected to this environment and as a result, fails. The moisture, detergent, and foam attack the bearing lubricant, causing it to fail. The prior art has taught the use of air seals to provide an air flow that isolates the bearing from this adverse environment. These air seals work well and are widely used in commercial units, in. where the additional cost is small compared to the total cost of the unit. However, in the lower cost home units, the added protection of the air seal is considered a prohibitive cost in most cases. Other methods have been considered to protect the motor / fan shaft bearing. These have included seals, labyrinths, and fins in the housing, near the back side of the fan. However, even these technical structures result in increased costs, which P1028 / 96MX are usually not justified in lower cost home units.

PRESENTATION OF THE INVENTION In light of the foregoing, a first aspect of the present invention is to provide a bearing protection system for a vacuum generating engine, for use in an effluent evacuation device, which provides a level of protection to the bearing of the arrow, which is appropriate for a domestic appliance. Another aspect of the invention is the provision of a bearing protection system for a vacuum generating motor, for use in an effluent evacuation device, which eliminates the need for expensive and complex seals, fins or slats, and labyrinths. . A further aspect of the invention is the provision of a bearing protection system of a vacuum generating motor, for use in an effluent evacuation device, which is highly effective and has an efficient cost for its implementation in domestic extractor units or individual Another additional aspect of the invention is the provision of a protection system for the bearing of a vacuum generating motor, for use in an effluent evacuation device, and which provides a seal P1028 / 96MX effective in the bearing, by applying openings in the fan plate closest to the bearing. Another additional aspect of the invention is the provision of a bearing protection system for a vacuum generator engine, which is used in an effluent evacuation device, and which improves the seal of the bearing by including external blades on the fan, adjacent to the bearing. Another additional aspect of the invention is the provision of a bearing protection system for a vacuum generating motor, which is used in an effluent evacuation device, and which improves the seal of the bearing by including fins extending from the motor housing, adjacent to the fan and bearing. Another additional aspect of the invention is the provision of a bearing protection system for a vacuum generating motor, which is used in an effluent evacuation device, and which improves the seal of the bearing by including fins in an interposed separator. between the fan and the bearing. These and other aspects of the invention will become apparent as appropriate the detailed description, and are achieved by a bearing protection system of aP1028 / 96MX vacuum generator engine, comprising: a barrier wall; an engine on one side of the wall; an arrow that extends from the engine, passing through the wall, and that is rotatable within a bearing, - and a fan received in the arrow on one side of the wall opposite the engine; the fan comprises an upper plate and a lower plate with arcuate fins interposed therebetween, the lower plate having a central opening for extracting air from the outside of the fan towards the fins and the upper plate having at least one opening therein, for extract air from an area adjacent to the bearing and towards the fins. Still other aspects of the invention that will become apparent herein are achieved by the improvement of a bearing protection system, in a device that generates vacuum and that has: a motor maintained on a first side of a wall and a arrow that extends from the motor through the wall and that receives a fan on a second side of the wall; the arrow rotates inside a bearing maintained within the wall, this improvement comprises: a pair of openings passing through the upper fan plate, the openings are diametrically opposite to the arrow, the openings are in juxtaposition with the bearing .

P1028 / 96MX DESCRIPTION OF THE DRAWINGS For a full understanding of the objects, techniques, and structure of the invention reference should be made to the following detailed description and the accompanying drawings, in which: Figure 1 is a partial sectional view of a fan and a bearing unit according to the invention, as they are used in a spray jet extractor; Figure 2 is a bottom plan view of the fan used in the embodiment of Figure 1; Figure 3 is a side elevation view of the fan of Figure 2; Figure 4 is a cross-sectional view of a second embodiment of a bearing protection system of a vacuum generating motor, according to the invention; Figure 5 is a cross-sectional view of a fan unit used in a third embodiment of the invention; Figure 6 is a cross-sectional view of a bearing protection system of a vacuum generating motor, in accordance with a fourth embodiment of the invention; Figure 7 is a top plan view of a P1028 / 96MX spacer used in the embodiment of figure 6; and Figure 8 is a side elevational view of the separator of Figure 7.

BEST WAY TO CARRY OUT THE INVENTION Referring now to the drawings, and more particularly to Figure 1, it can be seen that a bearing protection system for a vacuum generating motor is designated generally by the number 10. As shown , a motor housing 12 provides, in the relevant part, a barrier wall between a motor chamber 14 and a fan chamber 16. A bore 18 passes through the motor housing 12 and receives therein an appropriate bearing 20. The bearing 20 can be of any suitable type, such as a plain bearing or bushing, a ball bearing unit, or the like. In any case, the bearing 20 receives an arrow 22 interconnecting a motor 24 which is inside the motor chamber 14, and a fan 26 which is kept inside the fan chamber 16. In the preferred embodiment of the invention, the fan 26 comprises a plurality of fan elements or layers 28, 30, stacked, as shown. As is well known to those skilled in the art, the engine chamber 14 is isolated from the fan chamber 16, by a barrier wall of the P1028 / 96MX motor housing 12. In accordance with the foregoing, the motor 24 is not subjected to the ambience of the fan chamber 16. Of course, the engine chamber 14 will normally receive and pass the cooling air from the engine through the engine 24, this air comes from the environment and is clean and dry in nature. In contrast, the fan chamber 16 will normally receive the working air of the unit, such as a spray jet extractor, which utilizes the bearing protection system 10 of a vacuum generating motor. , the chamber 16 of the ventilator will contain an environment consisting of: liquid, foam, detergent, and dirt.Of course, it is most desirable to insulate the bearing 20 from this environment.As shown in Figure 1, an appropriate separator 32 is interposed In addition, and as is customary in the art, a nut, jam nut, or the like, is secured to the arrow 22 opposite the fan element furthest from the separator 22, from the bearing 20 to the nearest fan element. such that the fan elements are held in a fixed position along the arrow 22, in an overlapped or stacked relationship.The total of fan elements are, in accordance with the above, Overlapped or stacked between the spacer 32 and a suitable nut or locknut engaging the arrow 22. P1028 / 96MX As shown, the fan element 28 comprises an upper plate or disk 34 and a lower plate or disk 36, having a plurality of arched fins 38 interposed between them. The fins 38 are preferably curved backward with respect to rotation, but may be cup-shaped in the direction of rotation, as is well known to those skilled in the art. Similarly, the fan element 30 would include a corresponding upper and lower plate with similar arcuate fins sandwiched therebetween. As best shown in Figures 2 and 3, the rivets 40 extend from the arcuate fin 38 and through the upper and lower plates 34, 36 for the purpose of securing the fins 38 in the proper position. As further shown in Figures 1 and 2, an annular opening 42 is provided in the lower platen 36 to create an eye of the associated fan element 28. The air is extracted from the outside of the fan element and towards the fins between the plates 34, 36, from which the air is evacuated. As further shown in Figure 2 and as is evident in Figure 1, an opening 44 is provided in the plate 34 to receive the arrow 22 which interconnects the motor 24 with the fan unit 26. Those skilled in the art will appreciate P1028 / 96MX that a separator 48 is received in the arrow 22 and interposed between the fan 28 and the fan 30 to maintain an appropriate separation between them. Like the fan 28, the fan 30 has an annular opening 50 in the lower plate 52 thereof. An upper plate 54 is parallel to the lower plate 52, so that the arcuate fins 56 can be held between them, in the same way that the fins 38 are kept inside the fan 28. An opening in the upper plate 54 receives the arrow 22 in a tight adjustment relationship. Additionally, the separator 48 may serve to "seal this opening. Those skilled in the art will readily appreciate that additional fan elements similar to the fan element 30 may also be placed on the arrow 22, they will be axially displaced along the same. For reasons of simplicity, only two fan elements 28, 30 have been shown. Those skilled in the art will further appreciate that the fan elements 28, 30 are secured to the arrow 22 and rotate therewith, so that the air is extracted through an inlet in the fan chamber 16, at a point below the fan unit 26. The air winds sequentially undulating through the fan elements spaced apart along the arrow 22, P1028 / 96MX ____ until it reaches the uppermost fan element 28 from which it is evacuated through an evacuation port, in the housing defining the fan chamber 16. As shown in Figure 1, the air is drawn into the eye of the fan 30 defined by the annular opening 50, and is then expelled outwardly from the fan along the arcuate fins 56. The air discharged in this manner is then attracted by the eye of the fan 28 defined by the lower opening 42. That air is similarly withdrawn towards the fins 40 and discharged radially outward, to the fins 38, and finally to an evacuation port of the chamber 16 of fan. As an important feature of the present invention, the openings 46 are provided in the upper plate 34 of the fan 28. Preferably, the openings 46 are uniformly circumferentially spaced around the opening 44 that receives the arrow 22. that two of these openings 46 are shown and preferred, it will be understood that other numbers of said openings 46 can be provided. In any case, it is more desired that the openings 46 be interposed in juxtaposition with the bearing 20 and the separator 32 interposed between the bearing 20 and the upper plate 34.

P1028 / 96MX Additionally, and as will be readily appreciated by those skilled in the art, the openings 46 being closer to the arrow 22 than the outer circumference of the opening 42, the openings 46 will fall into the fan eye. Those skilled in the art will readily appreciate that the openings 46 allow the negative pressure generated in the fan eye during rotation of the fan 28 to draw water or foam that has been found in its path, between the top plate 34 and the housing 12 of the motor, back to the working side or inner side of the fan 28. In other words, water or foam, which would otherwise approach the bearing 20, is drawn through the openings 46 to the eye of the fan and move away from the bearing 20 and the separator 32. Accordingly, any liquid or foam that would otherwise bathe the bearing 20 are brought into the fan and thus can not do any damage. It has been found that the effectiveness of the sweep or pumping action of the openings interposed in the top plate of the uppermost fan of the stack or fan overlap, depends on the number and location of the holes 46, the size of the holes, and the fan operating speed. Of course, the amount of P1028 / 96MX foam or water that has found its way to the back side of the fan is also a factor that impacts the effectiveness of the system just described. It will be appreciated that the purification system of the invention operates only when the fan is working. Accordingly, the system using the motor 24 and the fan 26 is tilted in such a way that the foam and water attack the bearing 20 and if the fan is not operated, it can result in damage to the bearing despite the debugging just described. However, once the motor is energized, the fan unit 28 with the holes 46, will pump out the effluent, from the area around the arrow 22, of the separator 32 and of the bearing 20. Of course, the present invention provides a method for reducing potential damage to a bearing in a system such as the one described, as well as reducing the possibility of an arrow seal area leaking in any application that includes a rotary impeller that has the bearing in the opposite side of the fan eye. Fan units that are used to collect liquids such as spray jet extractors and wet / dry type vacuum units, may benefit from the particular form of the invention just described. The pumping action to purify the liquid and the P1028 / 96MX foam of the bearing area 20 on the back side of the upper fan 28, can be facilitated by several changes in the basic principles of the invention. For example, and with reference to Figure 4, it can be seen that a bearing protection system of a vacuum generating motor according to the invention is designated by the number 60. Here, a housing 62 of the motor receives a bearing 64. having a motor / fan arrow 66 passing therethrough, as with the embodiment of FIG. 1. A spacer 68 is interposed between the housing 62 and a fan 70. As discussed above, the upper plate of FIG. fan 70 is provided with openings 62 for the purpose of extracting foam or liquid out of the bearing 64 and into the eye of the fan 70. The system 60 is also provided with a plurality of fins 74 extending downwardly from the housing 62, and interposed in the space between the housing 62 and the upper plate of the fan 70. Preferably, the fins 74 are arched, although it has been found that the linear fins are suitable to improve the pumping action of the openings 72 during rotation of the fan 70. The radially positioned fins 74 seek to direct the foam and water into the eye of the fan 70, so that they enter therethrough through the openings 72. .

P1028 / 96MX In another embodiment of the invention, it is contemplated that a bearing protection system for a vacuum generating motor may use a fan 76, such as that shown in FIG. 5. In this embodiment, the upper fan plate 76 it is provided with a plurality of fins or ribs 78 extending upwards, which are positioned radially outwardly of the openings 80 placed on either side of the hole 82 that is provided for the arrow 66. Again, and in a standard manner , an opening 84 is provided for the passage of air within the lower plate of the fan 76 and having a diameter preferably greater than the degree of separation of the openings 80. With the structure of figure 5 it has been found that the fins 78 in the upper plate of the fan 76 improves the pumping action, directing the liquid and the foam radially into the openings 80, to make them pass towards the eye or of the fan 76. It will be appreciated that the fins 78 may be substantially similar to the fins 74 of the embodiment of Figure 4, but to place the fins on the fan itself, more than in the accommodation. Of course, in the embodiment of Figure 5, it is contemplated that the fins 78 will push the effluent towards the outer edge of the upper fan pan, probably eliminating the need for opening 80. P1028 / 96MX Referring now to Figures 6-8 , an appreciation of a bearing protection system 86 can be obtained for a vacuum generating motor, consistent with the field of the present invention. Thus, a housing 88 of an engine maintains a bearing 90, which in turn receives an arrow 92 from a fan / motor. While in the illustration of figure 6 the engine is not shown, it will appreciate that said motor will be on the opposite side of the housing 88 of the fan 94, which is shown mounted on the arrow 92. As mentioned above, a plurality of of openings 96 are uniformly spaced around the center point of the upper plate of the fan 94. A spacer 98 is in standard form, interposed between the housing 88 or bearing 90 and the fan 94. In the embodiment of FIGS. 6-8, the separator 98 is uniquely configured to assist in the sealing technique of the bearing of the present invention, improving the pumping or purging action achieved by the openings 96 in the fan 94. The separator 98 is provided with a borehole. axial 100 to receive the arrow 92. A base 102, disc-shaped, in the base of the separator 98 and in a contact coupling with the upper plate of the fan 94, has practical shape nte disk with a serrated periphery. The upper part 106 of the separator 98 has a P1028 / 96MX substantially annular disc shape, and is adapted to engage the housing 88 or bearing 90. A plurality of fins or ribs 108 extend in an angularly ascending manner from the base 102 towards the external side wall of the body portion 110 cylindrical, which is interposed between the upper part 106 and the base 102. A plurality of curved surfaces 112 extend as membranes between the fins or ribs 108 from the cylindrical body portion 110 towards the notched periphery 104. When it is rotated to the fan 94, sweeping through the openings 96 is facilitated and improved by the fins or ribs 108, which extend downwardly and radially outwardly from the bearing area 90 toward the openings 96, and through the curved surfaces 112 interposed between them and similarly provide a gutter for moisture and associated waste. It should then be evident that the present invention contemplates the supply of sweep openings in the upper plate of the upper fan unit and in juxtaposition with the bearing interposed between the fan and motor units. The openings are placed inside the eye of the fan to extract moisture, liquid, or debris from an area P1028 / 96MX adjacent to the fan / motor bearing and to the low pressure of the fan eye. This material is then discharged through the evacuation port of the unit together with the other evacuated air. Fins can be added to the housing, fan, or separator interposed between them to assist in sweeping and pumping action to remove the harmful material. In this way it can be seen that the objectives of the invention are satisfied by the structure presented above. While according to the patent law, only the best form and preferred embodiment of the invention have been presented and described in detail, it will be understood that the invention is not limited thereto or by it. In accordance with the foregoing, for an appreciation of the true scope and extent of the invention, reference should be made to the following claims.

P1028 / 96MX

Claims (20)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property; A system for protecting the bearing of a vacuum generating motor, characterized in that it comprises: a barrier wall, - a motor on one side of said wall; an arrow extending from the motor, passing through the wall, and rotating inside a bearing, - and a fan received at the arrow on one side of the wall opposite the motor, the fan comprises a top plate and a bottom plate with arched lenses interposed between them, the lower plate has a central opening for extracting air from the outside of the fan towards the fins, and the upper plate has at least one opening therein for extracting air from an adjacent area to the bearing and to the fins.
2. 2. The bearing protection system of a vacuum generating motor according to claim 1, characterized in that the opening is in juxtaposition with the bearing.
3. 3. The bearing protection system of a vacuum generator engine according to claim 2, P1028 / 96MX is characterized in that it also comprises a separator interposed between the fan and the bearing, and that keeps the fan and the bearing in a fixed separation ratio.
4. 4. The bearing protection system of a vacuum generating motor according to claim 3, characterized in that the separator receives the arrow and has a first end of larger diameter, adjacent to the upper plate; and a second end of smaller diameter, adjacent to the bearing.
5. 5. The bearing protection system of a vacuum generating motor according to claim 4, characterized in that the spacer further comprises a plurality of ribs spaced circumferentially around the spacer and extending from the first end of larger diameter towards a spacer. area adjacent to the second end of smaller diameter.
6. 6. The roller protection system of a vacuum generator engine according to claim 5, characterized in that the separator further comprises curved surfaces extending between the ribs and interconnecting adjacent pairs of said ribs.
7. 7. The bearing protection system of a vacuum generating motor according to claim 3, characterized in that the upper plate of the fan is P1028 / 96MX characterized by a plurality of ribs extending from the upper plate towards the barrier wall.
8. 8. The bearing protection system of a vacuum generating motor according to claim 7, characterized in that the ribs are arched.
9. 9. The bearing protection system of a vacuum generating motor according to claim 8, characterized in that the ribs are circumferentially and radially spaced uniformly on the upper plate with respect to the arrow.
10. 10. The bearing protection system of a vacuum generating motor according to claim 3, characterized in that the barrier wall is characterized by a plurality of ribs extending from it, towards the upper plate.
11. 11. The bearing protection system of a vacuum generator engine according to claim 10, characterized in that the ribs are arched.
12. 12. The protection system of the bearing of a vacuum generating motor according to claim 11, characterized in that the ribs are radially and circumferentially spaced evenly over the barrier wall around the arrow.
13. 13. In a vacuum generator device having a motor that is maintained on a first side of a wall, and P1028 / 96MX an arrow that extends from the engine through the wall and that receives a fan on a second side of the wall, the arrow rotates inside a bearing that is kept inside the wall, the improvement of a bearing protection system, is characterized in that it comprises: a pair of openings that pass through an upper plate of the fan, the openings are diametrically opposite • with respect to the arrow, the openings are in juxtaposition with the tread.
14. 14. The improvement of a bearing protection system in a vacuum generating device according to claim 13, characterized in that it further comprises a plurality of fins extending from the upper plate towards the wall.
15. 15. The improvement of a bearing protection system in a vacuum generating device according to claim 14, characterized in that the fins are arched.
16. 16. The improvement of a bearing protection system in a vacuum generating device according to claim 13, further characterized in that it comprises a plurality of fins extending from the wall towards the upper plate.
17. 17. The improvement of a bearing protection system in a vacuum generating device according to the P1028 / 96MX claim 13, further characterized in that it comprises a spacer interposed between the bearing and the fan, the spacer comprises a spool received in the shaft, the spool has a first major end adjacent to the fan and a second smaller end adjacent to the bearing , the first and second ends are interconnected by a cylindrical body member.
18. 18. The improvement of a bearing protection system in a vacuum generating device according to claim 17, characterized in that the separator further comprises uniformly spaced ribs extending from the cylindrical body member towards the first end.
19. 19. The improvement of a bearing protection system in a vacuum generating device according to claim 18, further characterized in that they comprise surfaces interconnecting adjacent pairs of said ribs.
20. 20. The improvement of a bearing protection system in a vacuum generating device according to claim 19, characterized in that the first end of the separator has a serrated periphery. P1028 / 96MX