Electric motor

Abstract

The present invention relates to the field of motors, such as motors and generators for industrial applications, and more particularly to motors. The motor of the present invention comprises: a rotor including a shaft and a rotor core supported on the shaft; a stator surrounding the rotor; a motor frame surrounding the stator and including a first end plate at a driving end of the motor; and a bearing shield attached to the first end plate wherein the non-driving end of the motor is supported by the non-driving end support base and the driving end of the motor is configured to be mounted with a load by means of an adjustment flange, and wherein the motor further comprises: at least three threaded adjustment members fixed to the bearing shield or to the adjustment flange; and at least three threaded adjustment screws, each of the adjustment screws being configured for being driven by a respective threaded adjustment member and for radially moving the adjustment flange.

Description

Technical Field The present invention relates to the field of electric motors, such as electric motors and generators for industrial applications, and more particularly to electric motors. Background Art Electric motors are used in industry for different applications, such as in the transportation industry, in the process manufacturing industry, and in the energy industry. Electric motors convert electrical energy into mechanical energy. Most electric motors generate force through the interaction of a magnetic field and a current-carrying conductor. Electric motors are widely used in industry, and small and medium-sized industrial motors with highly standardized dimensions and characteristics provide convenient mechanical rights for industrial applications. Large electric motors are used for ship propulsion, ship propulsion units for the marine industry, pipeline compressors, and pumps rated at millions of watts. An electric motor comprises a rotor including a shaft and a rotor core supported on the shaft, a stator surrounding the rotor, and a motor frame surrounding the stator. The shaft is typically supported by bearing arrangements at both ends of the motor, i.e., the drive end and the non-drive end of the motor. In most applications, the motor frame of the electric motor is mounted on a support foundation near the load. However, in some applications, the motor must be mounted so that the support foundation is only available for the non-drive end of the motor. In applications where a supporting foundation is only available for the non-drive end of the motor, the motor must be mounted so that the drive end of the motor is supported to the load frame by means of an adapter flange. The problem with applications where support for the motor drive end is provided only by an adapter flange of the load frame is that alignment of the motor axis with the load axis is a very challenging and problematic task. During alignment of the motor and load shaft lines, the load and motor shafts must first be fully aligned with the adapter flanges, respectively, and confirmed by locking pins. Subsequently, when the motor and load are mounted together at a factory facility or in the field, the alignment must usually be calibrated. In principle, a well-aligned motor and compressor can be mounted together via matching adapter flanges without any additional work. In practice, alignment adjustments are often necessary due to tolerances and system flexibility. For example, droop in the motor load system can affect the alignment. Furthermore, in large motors, the alignment is affected by the flexibility of the adapter flange and the motor frame construction. Therefore, first of all, the alignment of the motor shaft with respect to the adapter flange must be performed by supporting the motor from the adapter flange and the motor feet at the non-drive end of the motor. The adapter flange is mounted on the drive-end bearing shield. The alignment must be performed by moving the adapter flange radially onto the bearing shield. When a well-aligned position is reached, locking pins are used to permanently locate the correct position. Alignment of the entire system is difficult and problematic, as the flange-shroud connection used for alignment also bears the weight of the entire system. At this stage, the locking pins must be removed to achieve the new alignment position. This system alignment often also requires drilling new pin holes. In principle, there are two traditional solutions to address alignment challenges. First, the stiffness of the structure can be increased to reduce deformation, and second, tighter manufacturing tolerances can be applied to reduce alignment errors. However, these solutions increase the weight of the component and add increased manufacturing costs. There is a need in the market for a motor solution that can allow the motor to be aligned with the load in applications where mounting of the motor must be performed such that a supporting foundation is available only to the non-drive end of the motor. Summary of the invention The object of the present invention is to introduce an electric motor which will provide a solution for aligning the electric motor with the load in applications where mounting of the electric motor has to be performed such that a supporting foundation is only available for the non-drive end of the electric motor. Further advantageous embodiments are provided. A novel motor is proposed, comprising: a rotor, comprising an axis and a rotor core supported on the axis; a stator, surrounding the rotor; a motor frame, surrounding the stator and comprising a first end plate at the drive end of the motor; and a bearing shield, attached to the first end plate, wherein the non-drive end of the motor is supported by a non-drive end support base, and the drive end of the motor is configured to be mounted with a load by means of an adjustment flange, and wherein the motor also includes at least three threaded adjustment members fixed to the bearing shield or to the adjustment flange; and at least three threaded adjustment screws, each of the adjustment screws being configured to be driven by a corresponding threaded adjustment member and to radially move the adjustment flange. In a preferred embodiment, the electric motor further comprises an adjustment flange mounted to the first end plate at the drive end of the electric motor using mounting bolts. In a preferred embodiment, the at least three threaded adjustment members are fixed to the bearing shield or to the adjustment flange by means of fixing screws. In a preferred embodiment, the at least three threaded adjustment members are welded to the bearing shield or to the adjustment flange. In a preferred embodiment, the at least three threaded adjustment members include two threaded adjustment members arranged in a vertical direction and two threaded adjustment members arranged in a horizontal direction. In a preferred embodiment, the at least three threaded adjustment members include eight threaded adjustment members. In a preferred embodiment, the at least three threaded adjustment members include one threaded adjustment member for each axial beam of the adjustment flange. In a preferred embodiment, the at least three threaded adjustment members are fixed to the bearing shield, and wherein the electric motor further comprises at least three corresponding contact members fixed to the adjustment flange. In a preferred embodiment, the at least three threaded adjustment members are fixed to the adjustment flange, and wherein the electric motor further comprises at least three corresponding contact members fixed to the bearing shield. In a preferred embodiment, the adjusting screw is arranged as a radial screw. In a preferred embodiment, the adjusting screw is arranged as a radial screw with a fine thread pitch. A new method for aligning a load with an electric motor is proposed, comprising an electric motor, the electric motor comprising: a rotor, comprising an axis and a rotor core supported on the axis; a stator, surrounding the rotor; a motor frame, surrounding the stator and comprising a first end plate at a drive end of the electric motor; and a bearing shield, attached to the first end plate, wherein a non-drive end of the electric motor is supported by a non-drive end support base, and the drive end of the electric motor is configured to be mounted with a load by means of an adjustment flange, and wherein the electric motor further comprises: at least three threaded adjustment members fixed to the bearing shield or to the adjustment flange; and at least three threaded adjustment screws, each of the adjustment screws The method comprises: mounting the adjusting flange to the motor; measuring the required alignment correction from the shaft of the motor; calculating the applied adjustment for each adjusting member used based on the measured required alignment correction; slightly loosening the mounting bolts of the adjusting flange to allow radial movement of the adjusting flange; adjusting the adjusting screw of each of the threaded adjusting members used according to the calculated adjustment to radially move the adjusting flange; and tightening the mounting bolts of the adjusting flange to secure the adjusting flange. In a preferred embodiment, the required alignment correction is measured by means of a laser based measurement and alignment system. In a preferred embodiment, in the calculation, the required rotation angle for each individual screw is calculated based on the measured required radial displacement of the adjustment flange. In a preferred embodiment, the method comprises removing the at least three threaded adjustment members from the bearing shield or from the adjustment flange. BRIEF DESCRIPTION OF THE DRAWINGS In the following, the present invention will be described in more detail by way of examples and with reference to the accompanying drawings, in which: Figure 1 An exemplary mounting arrangement for one embodiment of an electric motor according to the present invention is shown. Figure 2 An exemplary diagram of an embodiment of a drive end of an electric motor according to the invention is shown. Figure 3 An exemplary illustration of an embodiment of an adjustment flange of an electric motor according to the invention is shown. Figure 4 An exemplary illustration of an embodiment of a drive end of an electric motor without an adjustment flange according to the invention is shown. Figure 5 An exemplary illustration of an embodiment of a drive end of an electric motor with an adjustment flange according to the invention is shown. Figure 6 A top view of an embodiment of a threaded adjustment member of an electric motor according to the present invention is shown. Figure 7 A side view of an embodiment of a threaded adjustment member of an electric motor according to the present invention is shown. Figure 8 A top view of another embodiment of a threaded adjustment member of an electric motor according to the present invention is shown. Fig. 9 An exemplary illustration of a further exemplary embodiment of a drive end of an electric motor with an adjustment flange according to the invention is shown. Fig.10 A flow chart of an embodiment of a method for aligning a load with a motor according to the present invention is shown. The foregoing aspects, features and advantages of the present invention will become apparent from the accompanying drawings and the detailed description associated therewith. In the following, reference will be made to Figures 1 to 10 The present invention will be described in more detail by means of preferred embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION The following embodiments are exemplary. Although the description may refer to "one", "an" or "some" embodiments in multiple places, this does not necessarily mean that each such reference refers to the same embodiment, or that the feature applies only to, for example, a single embodiment. Individual features of different embodiments may also be combined to provide other embodiments. In general, all terms and expressions used should be interpreted broadly, and they are intended to illustrate rather than limit the embodiments. The accompanying drawings show only the components required to understand the various embodiments. The number and / or shape of the various elements, and generally their implementation, may differ from the examples shown in the figures. The application of the various embodiments described herein is not limited to any particular system, but can be used in conjunction with various applications where an electric motor must be mounted so that the support base can only be used for the non-drive end of the motor. The electric motor of the present invention comprises: a rotor, comprising an axis and a rotor core supported on the axis; a stator, surrounding the rotor; a motor frame, surrounding the stator and comprising a first end plate at the drive end of the electric motor; and a bearing shield, attached to the first end plate, wherein the non-drive end of the electric motor is supported by a non-drive end support base, and the drive end of the electric motor is configured to be mounted with a load by means of an adjustment flange, and wherein the electric motor also comprises at least three threaded adjustment members fixed to the bearing shield or to the adjustment flange; and at least three threaded adjustment screws, each of the adjustment screws being configured to be driven by a corresponding threaded adjustment member and to radially move the adjustment flange. In this application, when reference is made to a "threaded adjusting member", it is intended to include any form of small metal block element that includes a threaded introduction opening. In this application, when reference is made to a "threaded adjusting screw", it is intended to include any form of threaded screw, bolt or threaded element that is suitable for being driven through a threaded adjusting member. Figure 1 An exemplary mounting arrangement of an embodiment of an electric motor according to the present invention is shown. The mounting arrangement of the present invention comprises an electric motor 1, a load 2 and an adjustment flange 30. The electric motor 1 comprises a shaft 7, a rotor supported on the shaft 7, a stator surrounding the rotor, an electric motor frame 13-15 surrounding the stator, and a bearing shield 4 attached to the drive end D of the electric motor frame 13-15. Figure 1 The non-drive end is marked with the letter N and the drive end is marked with the letter D. The motor frame 13-15 comprises a housing 14 and end plates 13, 15 connected to the housing 14 at opposite axial ends of the frame, the shaft being supported by a first bearing arrangement on the first end plate 15 at the motor drive end D and by a second bearing arrangement on the second end plate 13 at the non-drive end N of the motor 1. The adjustment flange 30 connects the motor frame 13-15 to the frame 25 of the load 2. In this mounting arrangement, the motor 1 has a non-drive end support base 101 available only to the non-drive end N of the motor 1. The load 2 may be a compressor 2. like Figure 1 As shown, the motor foot 11 at the non-driving end N of the motor 1 is supported by the non-driving end support base 101. Correspondingly, the motor foot 12 at the motor driving end D is not supported. Figure 1 As shown, the drive end D of the motor is supported on the load 2 via an adjustment flange 30, which connects the frame of the motor 1 to the load frame 25. Figure 1As shown, the load foot 23 of the load 2 is supported by the load support base 103. In the process of installing the motor 1 and the load 2 together by means of the adjustment flange 30, the shaft 7 of the motor 1 is first aligned with the load shaft 27 of the load 2, and then the shaft 7 of the motor 1 and the load shaft 27 are coupled together. Figure 2 An exemplary illustration of one embodiment of the drive end of an electric motor according to the invention is shown. The motor frame 13-15 of the electric motor according to this embodiment comprises a housing 14 and end plates 13, 15 attached to the housing 14 at opposite axial ends of the frame. Figure 2 In the figure, a first end plate 15 at the drive end D of the motor is shown. The first end plate 15 comprises a bearing shield 4 attached to the first end plate 15 by attachment bolts 6. The first end plate 15 also comprises a plurality of threaded holes 8 arranged to receive attachment bolts for attaching and connecting the adjustment flange 3 to the first end plate 15 at the drive end D of the motor. The shaft 7 of the motor is marked with reference number 7. Figure 3 An exemplary illustration of an embodiment of an adjustment flange of an electric motor according to the present invention is shown. The illustrated embodiment of the adjustment flange 3 comprises two annular ends 31, 32, which are connected together by a plurality of axial beams 35, one end of each of the axial beams 35 being connected to the first annular end 31, and the other opposite end of each of the axial beams 35 being connected to the second annular end 32. The two annular ends 31, 32 of the adjustment flange 3 may have different diameters, such as Figure 3 Alternatively, the two annular ends 31, 32 of the adjusting flange 30 may have Figure 1 Same diameter as shown. The first annular end 31 of the adjusting flange 3 comprises a plurality of holes 33 arranged to receive mounting bolts for mounting the adjusting flange 3 to the first end plate 15 at the drive end D of the motor. Correspondingly, the second annular end 32 of the adjusting flange 3 comprises a plurality of holes 34 arranged to receive mounting bolts for mounting the adjusting flange 3 to the load frame 25. Figure 4 An exemplary illustration of an embodiment of a drive end of an electric motor without an adjustment flange according to the present invention is shown. The motor frame of the electric motor 1 according to this embodiment comprises a housing and end plates attached to the housing at opposite axial ends of the frame. Figure 4 In FIG. 1 , a first end plate 15 at a drive end D of the motor 1 is shown. The first end plate 15 comprises a bearing shield 4 attached to the first end plate 15 by attachment bolts 6 . exist Figure 4In the embodiment of the motor drive end according to the present invention without the adjustment flange 3 is shown. The first end plate 15 further comprises a plurality of threaded holes 8 arranged to receive mounting bolts for mounting the adjustment flange 3 to the first end plate 15 at the drive end D of the motor. The shaft 7 of the motor is marked with the reference number 7. Furthermore, the unsupported motor foot 12 at the drive end D of the motor is marked with the reference number 12. The motor according to the present embodiment includes at least three threaded adjustment members 40 fixed to the bearing shield 4. In the present embodiment, each of the at least three threaded adjustment members 40 is fixed to the bearing shield 4 of the motor by means of two fixing screws. The present embodiment includes eight threaded adjustment members 40 fixed to the bearing shield 4. In an alternative embodiment, each of the at least three threaded adjustment members 40 may be welded to the bearing shield 4 of the motor. In the present embodiment, each of the threaded adjustment members 40 includes an adjustment screw arranged to adjust the distance between the adjustment flange 3 and the bearing shield 4 attached to the first end plate 15 at the drive end D of the motor 1. The adjustment screw of the threaded adjustment member 40 is set as a radial screw for radial adjustment of the adjustment flange 3. In the present embodiment, the radial screw can be arranged as a fine thread pitch for enhanced adjustment, i.e., a thread pitch of 1.25 mm or less. Figure 5 An exemplary illustration of an embodiment of a motor drive end with an adjustment flange according to the present invention is shown. The motor frame of the motor according to this embodiment includes a housing and end plates attached to the housing at opposite axial ends of the frame. Figure 4 In FIG. 1 , a first end plate 15 at the drive end D of the motor is shown. The first end plate 15 comprises a bearing shield 4 attached to the first end plate 15 by attachment bolts 6 . exist Figure 5 In the embodiment of the drive end of the motor with an adjustment flange according to the present invention is shown. The adjustment flange 3 is mounted to the first end plate 15 at the drive end D of the motor by means of mounting bolts 38. The mounting bolts 38 are used to fix the first annular end 31 of the adjustment flange 3 to the plurality of threaded holes 8 in the first end plate 15 through the plurality of holes in the first annular end 31. The shaft 7 of the motor is marked with reference number 7. In addition, the unsupported motor foot 12 at the drive end D of the motor is marked with reference number 12. The motor according to the present embodiment includes at least three threaded adjustment members 40 fixed to the bearing shield 4. In the present embodiment, each of the at least three threaded adjustment members 40 is fixed to the bearing shield 4 of the motor by means of two fixing screws. The present embodiment includes eight threaded adjustment members 40 fixed to the bearing shield 4. In an alternative embodiment, each of the at least three threaded adjustment members 40 may be welded to the bearing shield 4 of the motor. In the present embodiment, each of the threaded adjustment members 40 includes an adjustment screw, which is arranged to adjust the distance between the adjustment flange 3 and the bearing shield 4 attached to the first end plate 15 at the drive end D of the motor 1. The adjusting member 40 comprises a small block 40 fixed on the bearing shield 4 and an adjusting screw passing through the small block 40. The head of the adjusting screw rests on the flange. The adjusting screw of the threaded adjusting member 40 is arranged as a radial screw for radial adjustment of the adjusting flange 3. This embodiment comprises eight threaded adjusting members 40 fixed on the bearing shield 4, i.e. one threaded adjusting member 40 having an adjusting screw for each axial beam 35 of the adjusting flange 3. In an alternative embodiment, the motor includes four threaded adjustment members 40 , wherein two threaded adjustment members 40 are arranged in a vertical direction and two threaded adjustment members 40 are arranged in a horizontal direction. By means of each of the threaded adjustment members 40 according to the present embodiment, the distance between the adjustment flange 3 and the bearing shield 4 near the threaded adjustment member 40 can be adjusted. In the adjustment process, the mounting bolts 38 of the adjustment flange 3 are first slightly loosened to allow radial movement of the adjustment flange 3. Thereafter, one or more threaded adjustment members 40 are selected on the side where the distance between the adjustment flange 3 and the bearing shield 4 is to be increased. Thereafter, the adjusting screw of each of the selected threaded adjusting members 40 is tightened and adjusted so that the adjusting screw first contacts the corresponding shaft beam 35 of the adjusting flange 3 and then further moves the adjusting flange 3 to the aligned position. Figure 6A top view of an embodiment of a threaded adjustment member of an electric motor according to the present invention is shown. In this embodiment, a threaded adjustment member 40 is fixed to the bearing shield 4 of the electric motor by means of two fixing screws 42, 43. In an alternative embodiment, the threaded adjustment member 40 may be welded to the bearing shield 4 of the electric motor. In this embodiment, the threaded adjustment member 40 includes an adjustment screw 41, which is arranged to adjust the distance d between the adjustment flange 3 and the bearing shield 4 attached to the first end plate 15 at the drive end D of the electric motor 1. The adjustment member 40 includes a small block 40 fixed to the bearing shield 4 and an adjustment screw 41 passing through the small block 40. The head of the adjustment screw 41 abuts against the flange. The adjustment screw 41 of each of the threaded adjustment members 40 is arranged as a radial screw for radial adjustment of the adjustment flange 3. In this embodiment, the radial screw 41 may be arranged with a fine thread pitch for enhanced adjustment, i.e., a thread pitch of 1.25 mm or less. By means of the threaded adjustment member 40 according to the present embodiment, the distance d between the adjustment flange 3 and the bearing shield 4 can be adjusted. During the adjustment process, the mounting bolts 38 of the adjustment flange 3 are first loosened slightly to allow radial movement of the adjustment flange 3. Thereafter, the adjustment screws 41 of the threaded adjustment member 40 are tightened and adjusted so that the adjustment screws 41 first contact the corresponding axial beams 35 of the adjustment flange 3, and then the adjustment flange 3 is further moved so that the distance d between the adjustment flange 3 and the bearing shield 4 is increased to the aligned position. Figure 7 A side view of an embodiment of a threaded adjustment member of an electric motor according to the present invention is shown. In this embodiment, a threaded adjustment member 40 is fixed to a bearing shield 4 of the electric motor by means of two fixing screws 42, 43. In this embodiment, the threaded adjustment member 40 includes an adjustment screw 41, which is arranged to adjust the distance d between the adjustment flange 3 and the bearing shield 4 attached to the first end plate 15 at the drive end D of the motor 1. The adjustment screw 41 of each of the threaded adjustment members 40 is arranged as a radial screw for radial adjustment of the adjustment flange 3. In this embodiment, the radial screw 41 may be provided with a fine thread pitch for enhanced adjustment, i.e., a thread pitch of 1.25 mm or less. Figure 8A top view of an embodiment of a threaded adjustment member of an electric motor according to the present invention is shown. In this embodiment, a threaded adjustment member 50 is welded to the bearing shield 4 of the motor, and a corresponding contact member 60 is welded to the adjustment flange 3. In this embodiment, the threaded adjustment member 40 includes an adjustment screw 51, which is arranged to adjust the distance d between the adjustment flange 3 and the bearing shield 4 attached to the first end plate 15 at the drive end D of the electric motor 1. The adjustment member 50 includes a small block 50 fixed on the bearing shield 4 and an adjustment screw 51 passing through the small block 50. The head of the adjustment screw 41 abuts against the flange. The adjustment screw 51 of each of the threaded adjustment members 50 is arranged as a radial screw for radial adjustment of the adjustment flange 3. In this embodiment, the radial screw 51 may be provided with a fine thread pitch for enhanced adjustment, i.e., a thread pitch of 1.25 mm or less. By means of the threaded adjustment member 50 and the corresponding contact member 60 according to the present embodiment, the distance d between the adjustment flange 3 and the bearing shield 4 can be adjusted. During the adjustment process, the mounting bolts 38 of the adjustment flange 3 are first loosened slightly to allow radial movement of the adjustment flange 3. Thereafter, the adjustment screw 51 of the threaded adjustment member 50 is tightened and adjusted so that the adjustment screw 51 first contacts the corresponding contact member 60 in the adjustment flange 3, and then the adjustment flange 3 is further moved so that the distance d between the adjustment flange 3 and the bearing shield 4 is increased to the aligned position. Fig. 9 An exemplary illustration of another embodiment of a drive end of an electric motor with an adjustment flange according to the present invention is shown. The motor frame of the electric motor according to this embodiment comprises a housing and end plates attached to the housing at opposite axial ends of the frame. Fig. 9 , a first end plate 15 at the drive end D of the motor is shown. The first end plate 15 comprises a bearing shield 4 connected to the first end plate 15 by attachment bolts 6 and an adjustment flange 3 mounted to the first end plate 15 by mounting bolts 38. The mounting bolts 38 are used to fix the first annular end 31 of the adjustment flange 3 to a plurality of threaded holes 8 in the first end plate 15 through a plurality of holes 33 in the first annular end 31. The shaft 7 of the motor is marked with reference number 7. In addition, the unsupported motor foot 12 at the drive end D of the motor is marked with reference number 12. The motor 1 according to another embodiment of the present invention comprises at least three threaded adjustment members 50 welded to the bearing shield 4 and at least three corresponding contact members 60 welded to the adjustment flange 3. In an alternative embodiment of the present invention, the motor 1 comprises at least three threaded adjustment members 50 welded to the adjustment flange 3 and at least three corresponding contact members 60 welded to the bearing shield 4.

[0001] The present embodiment comprises eight threaded adjustment members 50 welded to the bearing shield 4 and eight corresponding contact members 60 welded to the adjustment flange 3. In the present embodiment, each of the threaded adjustment members 50 comprises an adjustment screw 51 arranged to adjust the distance between the adjustment flange 3 and the bearing shield 4 attached to the first end plate 15 at the drive end D of the motor 1. The adjustment screw 51 of the threaded adjustment member 50 is arranged as a radial screw 51 for radial adjustment of the adjustment flange 3. In the present embodiment, the radial screw 51 may be provided with a fine thread pitch for enhanced adjustment, i.e., a thread pitch of 1.25 mm or less. In an alternative embodiment, the motor includes four threaded adjustment members 50 and four corresponding contact members 60 , wherein two threaded adjustment members 50 and two corresponding contact members 60 are arranged in a vertical direction, and two threaded adjustment members 50 and two corresponding contact members 60 are arranged in a horizontal direction. According to another embodiment of the present invention, the distance between the adjusting flange 3 and the bearing shield 4 near the threaded adjusting member 50 can be adjusted by means of each threaded adjusting member 40 and the corresponding contact member 60. During the adjustment process, the mounting bolts 38 of the adjusting flange 3 are first slightly loosened to allow radial movement of the adjusting flange 3. Thereafter, one or more threaded adjusting members 50 are selected on the side where the distance between the adjusting flange 3 and the bearing shield 4 is to be increased. Thereafter, the adjusting screw 51 of each of the selected threaded adjusting members 50 is tightened and adjusted so that the adjusting screw 51 first contacts the corresponding contact member 60 in the adjusting flange 3 and then further moves the adjusting flange 3 to the aligned position. Thereafter, the mounting bolts 38 of the adjusting flange 3 are tightened to fix the adjusting flange 3 to the aligned position. Fig.10 A flow chart of an embodiment of a method for aligning a load with an electric motor according to the invention is shown. In the method according to this embodiment, an adjustment flange 3 is first mounted 71 to the electric motor 1. The adjustment flange 3 is mounted 71 to the first end plate 15 at the drive end D of the electric motor 1 by means of mounting bolts 38. The mounting bolts 38 are used to fix the first annular end 31 of the adjustment flange 3 to the plurality of threaded holes 8 in the first end plate 15 through the plurality of holes 33 in the first annular end 31. In this embodiment, as a next step, the required alignment correction is measured 72 from the shaft 7 of the electric motor 1. The measurement 72 can be performed by means of a laser-based measurement and alignment system. Thereafter, in this embodiment, the adjustment pieces 40, 50 used and the applied adjustment for each adjustment piece 40, 50 used are calculated 73 based on the measured desired alignment correction. The axial displacement of the screw is proportional to the rotation angle and the thread pitch. Therefore, the required rotation angle of a single screw can be calculated 73 based on the measured desired alignment correction, i.e. from the required radial displacement of the adjustment flange 3, 30. Similarly, the applied adjustment, i.e. the displacement of each adjustment screw 41, 51 in each adjustment piece 40, 50 used, is calculated 73 by simple trigonometric equations. Therefore, since the required alignment correction has been measured, the required rotation angle can be calculated for each adjustment screw 41, 51 based on the angular position of the adjustment screw 41, 51. In this embodiment, as a next step, the mounting bolts 38 of the adjustment flange 3 are slightly loosened 74 to allow radial movement of the adjustment flange 3. Thereafter, in the present embodiment, the calculated adjustment is applied 75 in each of the used adjustment pieces 40, 50. The adjustment is applied 75, i.e., the adjustment screws 41, 51 of each of the used threaded adjustment pieces 40, 50 are tightened and adjusted according to the calculated adjustment to radially move the adjustment flange 3 so that the adjustment screws 41, 51 move the adjustment flange 3 to the aligned position. In the present embodiment, as a next step, the mounting bolts 38 of the adjustment flange 3 are tightened 76 to secure the adjustment flange 3 to the aligned position. In an alternative embodiment of the method for aligning a load with an electric motor according to the present invention, as a last step, the at least three threaded adjustment pieces 40, 50 may be removed from the bearing shield 4 or the adjustment flange 3. With the present invention, an advanced and effective solution is provided for aligning a motor with a load. The method according to the present invention can be used during motor manufacturing and system integration. Another advantage of the present invention is that no locking pin is required, as the adjusting screw properly positions the adjusting flange for long-term operation. By means of the invention, the conventional stiffness of the structure can be used and normal manufacturing tolerances can be applied to the motor and the load.When the motor and the load are mounted together in a factory facility or in the field, the alignment scheme according to the invention can be used. The solution according to the invention provides an efficient solution for aligning a motor with a load in applications where the motor mounting has to be done so that the supporting foundation is only available for the non-drive end of the motor. It should be understood that the above description and the accompanying drawings are only intended to teach the best way to manufacture and use the present invention known to the inventor. For those skilled in the art, it is obvious that the concept of the present invention can be implemented in various ways. As those skilled in the art understand according to the above teachings, the above-mentioned embodiments of the present invention can therefore be modified or changed without departing from the present invention. Therefore, it should be understood that the present invention and its embodiments are not limited to the above examples, but can be changed within the scope of the claims and their equivalents.

Claims

1. An electric motor, comprising: a rotor comprising a shaft and a rotor core supported on the shaft; a stator surrounding the rotor; a motor frame surrounding the stator and including a first end plate at a drive end of the motor; as well as a bearing shield, attached to the first end plate, wherein the non-drive end of the motor is supported by a non-drive end support base, and the drive end of the motor is configured to be mounted together with a load by means of an adjustment flange, and The electric motor further comprises: at least three threaded adjustment members fixed to the bearing shield or to the adjustment flange; as well as At least three threaded adjustment screws, each of the adjustment screws being configured to be driven by a corresponding threaded adjustment member and to radially move the adjustment flange. 2 . The electric motor of claim 1 , wherein the electric motor further comprises an adjustment flange mounted to the first end plate at the drive end of the electric motor using mounting bolts.

3. The electric motor according to claim 1 or 2, wherein the at least three threaded adjustment members are fixed to the bearing shield or to the adjustment flange by means of fixing screws.

4. The electric motor according to claim 1 or 2, wherein the at least three threaded adjustment members are welded to the bearing shield or to the adjustment flange. 5 . The electric motor according to claim 1 , wherein the at least three threaded adjustment members include two threaded adjustment members arranged in a vertical direction and two threaded adjustment members arranged in a horizontal direction.

6. The electric motor according to any one of claims 1 to 4, wherein the at least three threaded adjustment members include eight threaded adjustment members.

7. The electric motor of any one of claims 1 to 6, wherein the at least three threaded adjustment members include one threaded adjustment member for each axial beam of the adjustment flange.

8. The electric motor according to any one of claims 1 to 7, wherein the at least three threaded adjustment members are fixed to the bearing shield, and wherein the electric motor further comprises at least three corresponding contacts fixed to the adjustment flange.

9. The electric motor according to any one of claims 1 to 8, wherein the at least three threaded adjustment members are fixed to the adjustment flange, and wherein the electric motor further comprises at least three corresponding contact members fixed to the bearing shield.

10. The electric motor according to any one of claims 1 to 9, wherein the adjusting screw is arranged as a radial screw.

11. The electric motor according to claim 10, wherein the adjusting screw is arranged as a radial screw with a fine thread pitch.

12. A method for aligning a load with an electric motor, the electric motor comprising: a rotor comprising a shaft and a rotor core supported on the shaft; a stator surrounding the rotor; a motor frame surrounding the stator and including a first end plate at the drive end of the motor; and a bearing shield attached to the first end plate, wherein the non-drive end of the motor is supported by a non-drive end support base, and the drive end of the motor is configured to be mounted with a load by means of an adjustment flange, and wherein the motor further comprises: at least three threaded adjustment members fixed to the bearing shield or to the adjustment flange; and at least three threaded adjustment screws, each of the adjustment screws being configured to be driven by a corresponding threaded adjustment member and to radially move the adjustment flange, the method comprising: installing an adjustment flange to the motor; measuring a desired alignment correction from a shaft of the motor; calculating an applied adjustment for each used adjustment member based on the measured desired alignment correction; Slightly loosen the mounting bolts of the adjusting flange to allow radial movement of the adjusting flange; adjusting the adjusting screw of each of the threaded adjusting elements used for radially moving the adjusting flange according to the calculated adjustment, and Tighten the mounting bolts of the adjusting flange to fix the adjusting flange.

13. The method of claim 12, wherein the required alignment correction is measured by means of a laser based measurement and alignment system.

14. The method according to claim 12 or 13, wherein in the calculation, the required rotation angle for each individual screw is calculated based on the measured required radial displacement of the adjustment flange.

15. The method according to any one of claims 12 to 14, wherein the method comprises: The at least three threaded adjustment members are removed from the bearing shield or from the adjustment flange.

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