JP2002031061A - Assembly to support rotary shaft driven by electric motor and coupling body of multi-cylinder two-stage air compressor with externally mounted assembly to support rotary shaft thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a rotary shaft member driven by an electric motor which has possibility to cause vibrations and swinging during rotation, and rotor rubs the stator which may extent a bad influence upon the motor operation because no support is provided at all at the motor side end of the shaft. SOLUTION: A externally mounted assembly 30 to support the rotary shaft member 2 driven by the electric motor 20 is provided. The assembly 30 includes a baring supporting member 12 installed on an approximately vertical plane and a bearing member 14 mounted on the bearing supporting member 12. The bearing member 14 is coupled with the rotary shaft member 2 and is able to support the member 2, and thereby it is practicable to decrease the vertically directed and horizontally directed extrinsic movements of the rotary shaft member 2 while the member 2 is allowed to rotate freely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates generally to air-cooled, multi-cylinder, two-stage air compressors and motor assemblies for railway locomotives, and more particularly, the present invention relates to an electric motor supported by an external bearing. It relates to the crankshaft of such an air compressor to be driven.

[0002]

RELATED APPLICATIONS The invention taught in the present patent application relates to an assembly for supporting a rotating shaft member driven by a motor and a multi-cylinder two-stage air compressor, which is filed at the same time as serial number SAS14615. And an external mounting assembly supporting a rotating shaft member driven by an electric motor. These patent applications are assigned to the same assignee, the teachings of which are incorporated herein by reference.

[0003]

BACKGROUND OF THE INVENTION The use of multi-cylinder air compressors in rail and passenger locomotives to supply compressed air to the operation and control of railway air brake systems is well known. Many of these prior art air compressors
Includes a piston having a pair of low pressure cylinders and one high pressure cylinder mounted and supported on the crankcase in a general manner and actuated by a connecting rod driven by a rotating crankshaft. One end of the crankshaft is connected to and driven by a suitable rotary prime mover, for example, an electric motor. The other end of the crankshaft
It is keyed to the hub and wheel of the cooling fan assembly and is threadably mounted by a lock nut.

[0004] It is advantageous for the compressor to drive the cooling fan directly. As the demand and speed of the air compressor increases, so does the speed and cooling capacity of the fan. Only when the compressor shuts down, that is, when it stops spinning, the fan will stop spinning. If a separate electric motor is used to drive the cooling fan, the cooling effect will be lost due to motor failure, the temperature of the rotary compressor will rise to dangerously high levels, lubricating oil will deteriorate, and air compression will occur. It has been found that the reliability is low because the burn-in of the machine may occur.

[0005] Crankshafts driven by electric motors do not have any support in the prior art at the motor end of the shaft. This is the shaft end opposite the fan. As the shaft rotates, it tends to oscillate over time, and may possibly begin to wobble. Any movement of the shaft other than the rotational movement it is designed to perform will cause problems for the motor.

[0006] Proper operation requires the presence of a space between the stator and the rotating part of the motor. This space must be maintained. If the rotor contacts or rubs the stator, the motor will have problems. On the other hand, increasing the space between the stator and the rotor results in loss of motor efficiency and power, so minimizing this space is also important. in this way,
Space is needed, but it must be as small as possible. As the shaft begins to oscillate or rock, the rotor will rub against the stator, which will adversely affect the motor.

[0007]

SUMMARY OF THE INVENTION The present invention provides an external mounting assembly for supporting a rotating shaft member driven by an electric motor. The external mounting assembly includes a bearing support member disposed substantially on a vertical plane and a bearing member mounted to the bearing support member. The bearing member can be coupled to and support the rotating shaft member, thereby allowing the rotating shaft member to rotate freely while providing extrinsic vertical and horizontal movement of the rotating shaft member. Can be reduced.

A second embodiment of the present invention is to provide an external mounting device for supporting a rotary shaft member of an air compressor in combination with a multi-cylinder two-stage air compressor in which a rotary shaft member is driven by an electric motor. Has been proposed. The external mounting device includes a bearing support member disposed on a substantially vertical plane, and a bearing member mounted on the bearing support member. The bearing member can be connected to the rotating shaft member of the air compressor to fix the rotating shaft member, thereby allowing the rotating shaft member to rotate freely while extrinsic vertical and horizontal rotation of the rotating shaft member. Exercise can be reduced.

Therefore, one of the main objects of the present invention is to provide a crankshaft support outside the motor housing to reduce shaft vibrations in an air compressor / electric motor combination. is there.

It is a further object of the present invention to provide an external support device for a crankshaft in an air compressor / electric motor combination to reduce the likelihood of the rotor rubbing the stator.

It is a further object of the present invention to provide a support device for a crankshaft mounted on an electric motor housing in an air compressor / electric motor combination.

The above and various other objects and advantages of the present invention will become apparent from the following detailed description and the appended claims, taken in conjunction with the accompanying drawings.

[0013]

Before proceeding with a more detailed description of the invention, it should be noted that for clarity, identical parts having the same function are designated by the same reference numerals throughout the several figures. .

Referring first to FIG. This is a block diagram of the present invention in combination with a multi-cylinder two-stage air compressor 10 connected to a predetermined electric motor 20. Such a multi-cylinder two-stage air compressor 10 includes a piston operated by a connecting rod driven by a rotating crankshaft (rotating shaft member) 2. One end of the crankshaft 2 is connected to a hub and a wheel of the cooling fan assembly 16. The other end of the crankshaft 2 is driven by a predetermined electric motor 20. Beyond a certain period of time, the crankshaft 2 will tend to vibrate or wobble during rotation. Movements other than the rotational movement that the crankshaft 2 is designed to perform will create problems.

For proper operation of the electric motor, the stator 4
It is necessary that a space exists between the motor and the rotor 6 which is a rotating part of the electric motor. This space must be maintained. Whether the rotor 6 contacts the stator 4
Rubbing the stator will cause problems with the electric motor 20. It is also important to minimize this space, as this space increases the efficiency and power of the electric motor.

The present invention supports the crankshaft 2,
This provides an external mounting device, generally designated by reference numeral 30, that prevents or at least minimizes extrinsic vertical or horizontal movement of the crankshaft 2. An upright bearing support member 12 is provided. A bearing member 14 is attached to the upright bearing support member 12. The bearing member 14 is connectable to the crankshaft 2 of the multi-cylinder two-stage air compressor 10. With the bearing member 14 and the upright bearing support member 12 supporting the crankshaft, any extrinsic movement of the crankshaft 2 is minimized. Since the bearing member 14 rotates freely, it does not impede the rotational movement of the crankshaft 2. 1 of the present invention
In one embodiment, bearing member 14 is a split bearing. In the embodiment of the invention, the bearing member 14 is connected to the outer end of the crankshaft 2.

The upright bearing support member 12 includes the electric motor 2.
It is connected to the motor housing currently used to surround the zero. The connection can also be formed by changing the cover part of the housing so that the bearing member 14 can contact and fix the crankshaft 2. However, the use of the upright bearing support member 12 instead of the current cover portion of the motor housing of a given electric motor 20 is within the scope of the present invention. The external mounting device 30 can be incorporated into a new compressor assembly, but can also be retrofitted to air compressors currently in use.

Having described in detail both the presently preferred embodiment of the present invention and numerous modifications thereof, those skilled in the relevant art of air compressor systems will appreciate the spirit of the invention and the appended claims. It is to be understood that various other applications and modifications of the invention can be made without departing from any of the scope of the sections. Therefore, the present invention can be protected not only by the appended claims but also by the concepts described in the following items. (1) The assembly for supporting a rotary shaft member driven by an electric motor according to claim 4, wherein the bearing member is connected to an outer end of the rotary shaft member. (2) The assembly for supporting a rotary shaft member driven by an electric motor according to claim 2, wherein the assembly is mounted outside the motor housing. 3. The external mounting assembly for supporting a multi-cylinder two-stage air compressor and a rotary shaft member of the air compressor according to claim 6, wherein the bearing support member serves as a cover for the housing of the electric motor. Combined with. (4) The external mounting for supporting a rotary shaft member driven by an electric motor and a multi-cylinder two-stage air compressor according to claim 7, wherein the bearing member is connected to an outer end of the rotary shaft member. Combination with assembly.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional multi-cylinder two-stage air compressor.

FIG. 2 is a schematic block diagram of an embodiment of the present invention in combination with a multi-cylinder two-stage air compressor of the type shown in FIG.

[Explanation of symbols]

2 ... crankshaft (rotary shaft member), 4 ... stator, 6 ... rotor, 10 ... multi-cylinder two-stage air compressor, 12 ... upright bearing support member, 14 ... bearing member, 1
6: cooling fan assembly, 20: electric motor, 30: external mounting device.

 ────────────────────────────────────────────────── ─── Continued on front page (72) James Verney, United States, Pennsylvania, North Huntingdon, Tara Drive, 1956 (72) Inventor Brian El Cankerman, United States, Pennsylvania, Blairsville, Earldee・ Number 2, Box 351 (72) Inventor Walter E. Gettle United States, Pennsylvania, Monongahera, Williamsport Road 4619 F-term (reference) 3H076 AA03 AA40 BB01 BB26 BB28 CC07 CC24 CC36 CC47 CC99

Claims (7)

[Claims] 1. An assembly for supporting a rotating shaft member driven by an electric motor, comprising: (a) a bearing support member disposed on a substantially vertical plane; and (b) carried by the bearing support member. A bearing member coupled to the rotating shaft member to support the rotating shaft member, thereby allowing the rotating shaft member to rotate freely while exposing the rotating shaft member to external forces. An assembly adapted to reduce sexual vertical and horizontal movement. 2. The assembly for supporting a rotating shaft member driven by an electric motor according to claim 1, wherein the bearing support member is connected to a cover of a housing of the electric motor. 3. The assembly for supporting a rotary shaft member driven by an electric motor according to claim 1, wherein the bearing support member serves as a cover for a housing of the electric motor. 4. The assembly for supporting a rotating shaft member driven by an electric motor according to claim 1, wherein said bearing member is a split bearing. 5. A combination of a multi-cylinder two-stage air compressor in which a rotary shaft member is driven by an electric motor and an external mounting assembly supporting the rotary shaft member of the air compressor, wherein the external mounting assembly is provided. The three-dimensional body includes: (a) a bearing support member disposed on a substantially vertical plane; and (b) a bearing member carried by the bearing support member, wherein the bearing member is connected to the rotating shaft member and Can support the rotating shaft member,
A combination adapted to reduce extrinsic vertical and horizontal movement of the rotating shaft member while freely rotating the rotating shaft member. 6. The multi-cylinder two-stage air compressor according to claim 7, wherein the bearing support member is connected to a cover of a housing of the electric motor, and an external member that supports a rotary shaft member of the air compressor. Combination with mounting assembly. 7. The combination of claim 5, wherein said bearing member is a split bearing and a multi-cylinder two-stage air compressor and an external mounting assembly supporting a rotating shaft member driven by an electric motor.