MXPA97008263A - Engine that has univer fan end holder - Google Patents

Abstract

The present invention relates to a fan end fastener for a motorized fan assembly having a plurality of curvilinear thinned air passages. Each air passage includes a flow gate, such that the air that is being moved by a rotating fan assembly is directed through the air passages and flow gates. A skeletal motor assembly is fixed to one side of the end fastener, such that the arrow of the motor is disposed through an arrow opening in the end fastener. A rotating fan member is attached to the arrow of the motor adjacent to the other side of the end fastener. A cover member is provided to cover the rotating fan member, to cause the flow of air to be directed through the air passages. A screen plate is interposed between the rotating fan member and the end fastener. The display plate includes a plurality of curvilinear scallops corresponding to the air passages in the end fastener. An effective flow gate is created between the scallops of the screen plate and the thinned ramp surfaces of the end clips, so that the size of the effective flow gate can be adjusted, merely by changing the screen plate, to optimize fan flow and pressure parameters for a particulate motor size

Description

OUE ENGINE HAS UNIVERSAL FAN END HOLDER TECHNICAL FIELD The present invention resides in the technique of dynamo-electric machines such as motors and generators. More particularly, the invention relates to a fan end fastener for said motors and generators. Specifically, the invention relates to a universal fan end fastener adapted to be used with a wide variety of motor sizes.

TECHNICAL BACKGROUND Up to now, it has been known to use electric motors to drive fans for different air handling or cooling operations. In these motors, a fan end fastener is screwed into a cup-shaped motor housing, where the motor windings are retained. It has also been known to use fan end fasteners in conjunction with motors having skeletal structures, which allow the use of multiple sizes of motors with a fan end fastener of a single size. More recently, it has been known to use fan end fasteners that include air passages to efficiently move the air therethrough. In these end fasteners, the size of the respective intake and exhaust passages are selected to optimize the air flow and air pressure for a motor of a particular size in a particular application. However, the use of different size motors with a single-size end fastener, which has air passages in it, has not been practical, because the size of the air passages must be fine-tuned to match the size and speed of the engine. In accordance with the foregoing, it is highly desirable to obtain a universal fan end fastener, which is adapted to be used with a number of different motor sizes, and which is capable of being tuned for each particular motor size and application.

DESCRIPTION OF THE INVENTION In light of the foregoing, it is an aspect of the invention to provide a fan end fastener for an electric motor assembly. Another aspect of the invention is the provision of a fan end fastener for a motor assembly, having a plurality of air passages therein, for optimizing air flow and air pressure. Still a further aspect of the invention is the provision of a fan end fastener, which is adapted to be used with a number of different motor sizes. Yet another aspect of the invention is the provision of a fan end fastener that is capable of being tuned to optimize air pressure and air flow for a particular motor size and application. The foregoing and other aspects of the invention which will become clearer as the detailed description proceeds, are achieved by an engine assembly having a rotary fan member operatively connected with a rotor member, the rotor member being arranged inside. of a stator assembly, which comprises: a fan end fastener having first and second sides; a plurality of thinned air passages in the first and second sides, each air passage having a fixed flow gate opening therein; an element for mounting the stator assembly on the fan end fastener; an element for covering the fan member, the element for covering with the fan end fastener being able to be coupled; and an element for selectively providing an effective flow gate opening corresponding to each air passage, the element being interposed to provide selectively, between the fan member and the end fastener. Other aspects of the invention are obtained by a shield plate for a motorized fan assembly having a fan end fastenerthe end fastener having a plurality of thinned air passages defined by a plurality of ramp surfaces and flow gates, the shield plate comprising: an annular disc-shaped member having a central arrow aperture therein, and a plurality of the scalloped scalloped members located around its outer circumference. Still other aspects of the invention are obtained by a universal fan end fastener assembly for a motorized fan, which comprises: an end fastener having a first side; a second side opposite the first side; a cylindrical outer wall between the first side and the second side, the first and second sides having a central arrow opening therethrough; a plurality of thinned ramp surfaces that radiate outwardly from the central arrow opening towards the cylindrical outer wall on the first side, the plurality of thinned ramp surfaces defining a plurality of curvilinear air passages; a flow damper in each air passage; and an engine mounting flange on the second side; and a screen plate having a plurality of curvilinear scallops therein, this screen plate adapted to be disposed on the first side of the end fastener.

BRIEF DESCRIPTION OF THE DRAWINGS For a complete 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 an elevated view separated into parts, in partial cross section, of the motor assembly according to the invention. Figure 2 is a top plan view of the fan end fastener according to the invention. Figure 3 is a bottom plan view of the fan end fastener according to the invention. Figure 4 is a cross-sectional view of the fan fastener, taken along line 4-4 of Figure 2. Figure 5 is a side elevational view of the fan end fastener.

Figure 6 is a top plan view of the screen plate according to the invention. Fig. 7 is an elevated view of the fastener and the screen plate.

BEST MODE FOR CARRYING OUT THE INVENTION Referring now to the drawings, it can be seen that a fan end fastener assembly according to the invention is designated generally by the numeral 10. Although it will be appreciated that the concept of the invention is applicable to any dynamoelectric device, the description herein will be with respect to a motor assembly of the kind shown. In this device, a motor assembly 12 is fixed to a generally cylindrical end fastener 14. A rotating fan member 15 is mounted on the motor assembly 12 by means of an arrow 16 extending through the end fastener 14. A screen plate 18 is interposed between the rotating fan member 15 and the end holder 14, for reasons that will become clearer as the description proceeds. A cover member 19 is provided on the rotary fan member 15, and is fixedly attached to the end gripper 14. The cover member 19 is cup-shaped, and has an airflow opening 20 therethrough. Referring now to Figures 2 to 5, it can be seen that the end fastener 14 includes a first side 21 and a second side 22. The end fastener 14 further includes a generally cylindrical circumferential outer wall 23. As can be seen, the first side 21 of the end fastener 14 is generally defined by a central fan mounting plane 24, which has a central arrow aperture 26 therethrough. A plurality of thinned air passages 27 are arranged in a curved solar burst configuration which are radiated from the mounting plane of the fan 24 outwards, towards the outer wall 23. Each air passage 27 is defined by a thinned ramp surface upper 28, which thins from the mounting plane of the fan 24 towards the outer wall 23. On a rear edge 29 of each air passage 27, there is a gate opening 30 which is in communication with the second side 22 of the fastener end 14. The second side 22 of end fastener 14 is generally defined by a central bearing assembly 31 comprising a cylindrical wall 32 disposed about the arrow opening 26. A stator mounting flange 34 comprises a wall member 35 which extends generally orthogonally from the second side 22 of the end fastener 14. A plurality of air passages 36 are included, which are contiguous with the air passages. 27 respectively, on the second side 22 of the end fastener 14. The air passages 36 are defined by a plurality of curvilinear passage walls 38, which radiate outwardly from the bearing assembly 31 to the stator mounting flange 34. Referring now to Figure 6, it can be seen that the screen member 18 comprises a generally annular disk-shaped plate, having a central opening 39 therein. As can be seen, the outermost diameter of the screen member 18 is approximately equal to that of the outer wall 23 of the end fastener 14. It can also be seen that the screen member 18 is provided with a plurality of scallops 40 around it. its external diameter; the number of scallops 40 corresponding to the number of air passages 27 in the end fastener 14. Each scallop 40 is defined by a front end 42 and a rear end 43. As shown, the front end 42 of each scallop 40 starts at the rear end 43 of an adjacent scalloped 40. For reasons that will become clearer as the description proceeds, the curvilinear scalloped profile 44 between the front end 42 and the rear end 43 of each scallop 40 approaches the curvilinear profile of each air passage 27 in the end fastener 14. The dimension of the scalloped profile 44 can be adjusted depending on the desired amount of air flow through passages 27 and 36. The fan side of the shield plate can be provided with screen flaps 45 along the outer periphery of the scalloped profile 44. The screen flaps 45 facilitate the smooth directional flow of air between the v-shaped member. 15 and the cylindrical end fastener 14. Of course, the screen flaps 45 are placed so as not to interfere with the rotation of the fan member 15. Referring again to Figure 1, the assembly of the device 10 is made by fixing with screws assembly a portion of the stator 46 of the motor assembly 12, to the stator mounting flange 34 of the end fastener 14. A rotor portion 47 of the motor assembly 12 is disposed within the stator portion 46, so that the arrow 16 extends through the arrow opening 26, and is supported on the bearing assembly 31 by means of a bearing 48. The screen member 18 is disposed adjacent the mounting plane of the fan 24 of the end fastener 14. , and the rotating fan member 15 is mounted on the arrow 16 by a fastener 49 with a sheave disposed therebetween. The assembly of the device 10 is accomplished by securing the cover member 19 to the end gripper 14. The cover member 19 snaps or frictionally engages the outer wall 23 of the end bracket 14 as shown. In operation, when a fan end fastener 10 is assembled, air is directed through the opening 20, towards the central portion of the fan member 15, over which air is directed radially outward toward the plate screen 18 and towards the cylindrical end fastener 14. The rotating fan member 15 directs the air through the end fastener 14, by means of the air passages 27. Although each air passage 27 includes a fixed gate opening 30. , the screen member 18 is used to produce an effective gate opening 50. The effective gate openings 50 are created between the front end 42 of the scallops 40 of the screen 18, and the ramp surfaces 28 of the air passages. 27. It should be recognized that the distance between the front end 42 and the ramp surface 28 defines the effective gate opening 50, through which air can pass when moved by the valve member. Rotary Enlarger 15. It should also be noted that the size of the effective gate opening 50 can be increased or decreased by shortening or elongation, respectively, of the curvilinear profile 44 of the scallops 40. In accordance with the foregoing, it can be selectively controlled the amount of air flow and pressure inside the end fastener 14, by using shield plates 18 having different lengths for the curvilinear profiles 44. Those skilled in the art will now recognize that an end fastener has been obtained. Universal fan, since you can use a single-size fan end bracket 14 with a number of motors that have different sizes of axial length. This is facilitated by the use of motor assemblies that have skeletal structures that can be attached to the end fastener, opposite to the previous end fasteners, which enclose the stator assembly. As such, any time a different sized motor assembly is used, only the configuration of the screen plate 14, and not the entire end fastener assembly, need to be changed. In other words, the use of screen plates 18 allows the effective gates 50 of the end fastener to be refined, to optimize the flow and pressure conditions for each motor size, without the need for a different end fastener. Accordingly, it can be seen that the objects of the invention have been satisfied by the structure presented above. Although in accordance with the patent statutes, only the best form and preferred embodiment of the invention has been presented and described in detail, it should be understood that the invention is not limited thereto or by the same. In accordance with the foregoing, for an appreciation of the true scope of the invention, reference should be made to the following claims.

Claims (20)

NOVELTY OF THE INVENTION Having described the above invention, it is considered as a novelty, and therefore, the content of the following is claimed as property: CLAIMS

1. An "engine assembly" having a rotating fan member operatively connected to a rotor member, the rotor member being disposed within a stator assembly, which comprises: a fan end fastener having first and second sides; a plurality of thinned air passages in the first and second sides, each air passage having a fixed flow gate opening therein; an element for mounting the stator assembly on the fan end fastener, - an element for covering the fan member, the element for covering with the fan end fastener being engageable; and an element for selectively providing an effective flow gate opening corresponding to each air passage, the element being interposed to provide selectively, between the fan member and the end fastener. The motor assembly according to claim 1, characterized in that the mounting element is a mounting flange located on the second side of the end fastener. 3. The motor assembly according to claim 1, characterized in that the element for covering the fan member, is a cup-shaped fan cover having an internal diameter that approximates the external diameter of the fastener of extreme. The motor assembly according to claim 1, characterized in that the element for selectively providing an effective gate opening comprises an annular disk-shaped screen plate. 5. The motor assembly according to claim 4, characterized in that the screen plate has a central arrow aperture, and a plurality of scallops thinned around its circumference, each scalloped having a thinned screen flap that is extends from it. The motor assembly according to claim 5, characterized in that the number of the plurality of scallops is equal to the number of air passages in the end fastener. The motor assembly according to claim 4, characterized in that the diameter of the screen plate is slightly smaller than the diameter of the element to be covered. The motor assembly according to claim 5, characterized in that each of the scallops has a front end and a rear end, and the rear end of a scallop ends at the front end of an adjacent scallop. 9. The motor assembly according to claim 8, characterized in that the distance between the front end of the scallop and the rear end of the scallop determines the size of each effective gate opening. 10. A screen plate for a motorized fan assembly having a fan end fastener, the end fastener having a plurality of thinned air passages defined by a plurality of ramp surfaces and flow gates, the plate comprising screen: a ring disk-shaped member having a central arrow opening therein, and a plurality of thinned scalloped members located around its outer circumference. 11. The screen plate for a motorized fan assembly according to claim 10, characterized in that the number of scallops corresponds to the number of air passages in the end fastener. 1

2. The screen plate for a motorized fan assembly in accordance with the claim of claim 10, characterized in that each scallop is defined by a front end, a rear end, and a curvilinear edge that connects to the front end and the rear end. 1

3. The screen plate for a motorized fan assembly as claimed in claim 12, characterized in that the front end of a scallop ends at the rear end of an adjacent scallop. 1

4. The screen plate for a motorized fan assembly according to claim 13, characterized by "that the curvilinear edge of each festoon approximates the profile of the air passages in the end fastener. 1

5. The screen plate for a motorized fan assembly as claimed in claim 14, characterized in that the screen plate is disposed on the end clamp, and thus defines an effective flow gate between the plate. screen and the ramp surface of each air passage, whereby the length of the curvilinear edge determines the size of the effective flow gate. 1

6. A universal fan end fastener assembly for a motorized fan assembly, which comprises: an end fastener having a first side; a second side opposite the first side; a cylindrical outer wall between the first side and the second side, the first and second sides having a central arrow opening therethrough; a plurality of thinned ramp surfaces that radiate outwardly from the central arrow opening towards the cylindrical outer wall on the first side, the plurality of thinned ramp surfaces defining a plurality of curvilinear air passages; a flow damper in each air passage; an engine mounting flange on the second side; and a screen plate having a plurality of curvilinear scallops therein, this screen plate adapted to be disposed on the first side of the end fastener. 1

7. The universal fan end fastener assembly according to claim 16, characterized in that the number of scallops on the screen plate corresponds to the number of air passages in the end fastener. 1

8. The universal fan end fastener assembly as claimed in claim 17, characterized in that each scallop is defined by a front end, a rear end, and a curvilinear edge that connects to the front end and the end rear, ending the front end of a festoon at the rear end of an adjacent scallop. 1

9. The universal fan end fastener assembly according to claim 18, characterized in that the curvilinear edge of the scallops approximates the profile of the air passages in the end fastener. 20. The universal fan end fastener assembly according to claim 19, characterized in that the shield plate is disposed on the end fastener, and thus defines an effective flow gate between the shield plate and the ramp surfaces of each air passage, whereby the length of the curvilinear edge of each scallop determines the size of the effective flow gate. SUMMARY OF THE INVENTION A fan end fastener for a motorized fan assembly has a plurality of curvilinear thinned air passages. Each air passage includes a flow gate, such that the air that is being moved by a rotating fan assembly is directed through the air passages and flow gates. A skeletal motor assembly is fixed to one side of the end fastener, such that the arrow of the motor is disposed through an arrow opening in the end fastener. A rotating fan member is attached to the arrow of the motor adjacent to the other side of the end fastener. A cover member is provided to cover the rotating fan member, to cause the flow of air to be directed through the air passages. A screen plate is interposed between the rotating fan member and the end fastener. The display plate includes a plurality of curvilinear scallops corresponding to the air passages in the end fastener. An effective flow gate is created between the scallops of the screen plate and the thinned ramp surfaces of the end clips, so that the size of the effective flow gate can be adjusted, merely by changing the screen plate, to optimize fan flow and pressure parameters for a particular motor size. * * * * *