A positioning device applied to an electric machine

Abstract

This utility model relates to the field of axial flow pump motor installation technology, and discloses a positioning device for the motor, including overlapping legs, a base, a fine-tuning mechanism, and a wire-laying mechanism. There are two overlapping legs, which are parallel to each other and located below the base and fixedly connected to it. The base is a hollow structure. The fine-tuning mechanism is fixed to the base. The fine-tuning mechanism includes a fixed frame, a first movable frame, and a second movable frame. The fixed frame is fixedly connected to the top surface of the base, the first movable frame is mounted on the fixed frame, and the second movable frame is mounted on the first movable frame. This device uses the combination of the first and second movable frames for positioning adjustment, enabling precise fine-tuning and achieving more accurate and stable vertical alignment during the alignment of the axial flow pump and motor, while saving time.

Description

Technical Field

[0001] This utility model relates to the field of axial flow pump motor installation technology, and discloses a positioning device for motors. Background Technology

[0002] The installation of a large axial flow pump and a large motor is a complex process. This large motor is typically an external rotor motor. Due to the significant size and weight of both the large axial flow pump and the large motor, the motor must first be disassembled, the stator removed, and then the motor hoisted above the axial flow pump. A plumb line is placed at the center of the motor, passing through the motor and extending into the axial flow pump. The distance between the plumb line and the pump is measured, and the position of the plumb line is continuously adjusted until it aligns with the pump's axis. Then, using the plumb line as a reference, the motor's position is adjusted so that its axis also falls on the plumb line, thus aligning the large motor with the pump's axis. The motor is then reassembled in this position and connected to the axial flow pump, completing the installation. Failure to use this installation method can easily lead to installation failure, requiring further time for reinstallation and repositioning.

[0003] Currently, in the alignment of axial flow pumps and motors, the plumb line is typically set up by placing a guide rail above the motor, extending a plumb line from the guide rail, allowing the plumb line to hang naturally, and then connecting a plumb bob to the end of the plumb line to straighten it and point it vertically. Adjusting the plumb line position requires manually moving the guide rail. Due to the low precision of human movement, fine-tuning the plumb line position manually often fails to achieve the desired position, requiring a long time to complete, resulting in low accuracy and excessive time consumption. However, the alignment of axial flow pumps and motors requires high precision to ensure successful installation. Therefore, improving the fine-tuning accuracy of the plumb line and reducing the time spent on fine-tuning has become an important requirement in the installation of large axial flow pumps and motors. It is necessary to develop a positioning device for the motor that can achieve more accurate and stable alignment and positioning of large axial flow pumps and motors, saving more time. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a positioning device for motors. This positioning device for motors makes the vertical line adjustment more accurate and stable and saves more time during the alignment and positioning of the axial flow pump and the motor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A positioning device for a motor includes: overlapping legs, a base, a fine-tuning mechanism, and a wire feeding mechanism. The overlapping legs are two parallel legs, each located below and fixedly connected to the base. The base is a hollow structure. The fine-tuning mechanism is fixed to the base. The fine-tuning mechanism includes a fixed frame, a first movable frame, and a second movable frame. The fixed frame is fixedly connected to the top surface of the base. The first movable frame is mounted on the fixed frame, and the second movable frame is mounted on the first movable frame. The first movable frame can move along a straight line on the fixed frame, and the second movable frame can move along a straight line on the first movable frame. The moving directions of the first and second movable frames are perpendicular to each other. The wire feeding mechanism includes a base plate and a spool. The base plate is fixed to the second movable frame. The center of the base plate is hollow. The spool is mounted on the base plate, and piano wire is wound on the spool. The free end of the piano wire passes sequentially through the center of the base plate, the second movable frame, the first movable frame, the fixed frame, and the center of the base, hanging downwards to connect to a plumb bob.

[0006] In this utility model, preferably, the fixed frame is provided with a first side plate and a first lead screw in a horizontal direction. The first lead screw passes through the first side plate and the first movable frame. The first lead screw is rotatably mounted on the first side plate and is threadedly connected to the first movable frame. A rocker arm is provided at the end of the first lead screw. The first movable frame is provided with a second side plate and a second lead screw in a horizontal direction. The second lead screw passes through the second side plate and the second movable frame. The second lead screw is rotatably mounted on the second side plate and is threadedly connected to the second movable frame. A rocker arm is provided at the end of the second lead screw.

[0007] In this utility model, preferably, the spool is mounted on the base plate by a spool clamp, and there are two spool clamps. The spool clamps are fixed vertically to the base plate, and the spool is rotatably mounted between the two spool clamps. One end of the spool is provided with a rocker arm.

[0008] In this utility model, preferably, a ratchet is provided on one side of the spool, and a pawl that cooperates with the ratchet is provided on the inner side of the spool clamp plate near the ratchet.

[0009] In this invention, preferably, the pawl is provided with a hand-operated protrusion, which can rotate to adjust the position of the pawl.

[0010] In this utility model, preferably, the center of the base plate is provided with a cross positioning structure, and the center of the cross positioning structure is provided with a wire hole.

[0011] In this utility model, preferably, the base includes a first annular plate, a second annular plate, and a plurality of trapezoidal plates. The radius of the first annular plate is larger than that of the second annular plate. The first annular plate is located below the second annular plate. The first annular plate and the second annular plate are fixedly connected by the trapezoidal plates. The number of trapezoidal plates is not less than three. The trapezoidal plates are evenly distributed on the edge of the second annular plate.

[0012] In this invention, preferably, both ends of the overlapping leg are retractable.

[0013] In this invention, preferably, the free end of the piano wire is connected to a hook.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This device uses a combination of a first and a second moving frame for positioning adjustment, enabling precise fine-tuning. This allows for more accurate and stable vertical alignment during the alignment of the axial flow pump and motor, saving time. The first and second lead screws control the first and second moving frames, allowing for fine-tuning of the vertical line position. The base plate, spool clamp, and rocker arm facilitate the connection and retraction of the piano wire. Ratchets and pawls control the rotation of the spool. A cross-shaped positioning structure at the center of the base plate provides an accurate guide path for the piano wire, ensuring the steel... The piano string remains vertical and stable during positioning, thus improving positioning accuracy and consistency. The rigid design of the cross-shaped positioning structure effectively reduces the swaying or deviation of the piano string under force, enhancing the stability and reliability of the positioning device. The connection between the free end of the piano string and the plumb hook, which connects to the plumb bob, facilitates the installation and removal of the plumb bob. The base is designed as a frustum shape with a hollow center, allowing technicians to easily reach into the base from the side for operation, improving ease of use. Furthermore, the absence of sharp edges enhances safety. The retractable design of the connecting legs allows the positioning device used in motors to be adapted to various environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the positioning device of this utility model applied to an electric motor.

[0016] Figure 2 This is a schematic diagram of the base and fine-tuning mechanism in the positioning device of the present invention applied to a motor.

[0017] Figure 3 This is a structural diagram of the base and fine-tuning mechanism in the positioning device of the present invention for a motor, taken from another angle.

[0018] Figure 4This is a schematic diagram of the wire feeding mechanism in the positioning device for motors according to this utility model.

[0019] Figure 5 This is a schematic diagram of the ratchet and pawl structure in the positioning device of the electric motor applied to this utility model.

[0020] Figure 6 This is a schematic diagram of the overlapping leg structure of the positioning device of the present invention applied to the motor.

[0021] In the attached diagram: 1. Overlapping leg; 2. Base; 21. First annular plate; 22. Second annular plate; 23. Trapezoidal plate; 3. Fine-tuning mechanism; 31. Fixed frame; 311. First side plate; 312. First lead screw; 32. First moving frame; 321. Second side plate; 322. Second lead screw; 33. Second moving frame; 4. Wire feeding mechanism; 41. Base plate; 411. Cross positioning structure; 42. Spool; 43. Piano wire; 44. Spool clamp; 45. Ratchet; 46. Pawl; 461. Hand-operated protrusion; 47. Hanging hook. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Please also see Figures 1 to 5A preferred embodiment of this utility model provides a positioning device for an electric motor, comprising: a connecting leg 1, a base 2, a fine-tuning mechanism 3, and a wire feeding mechanism 4.

[0026] like Figure 1 As shown, there are two overlapping legs 1, which are parallel to each other. Both overlapping legs 1 are located below the base 2 and are fixedly connected to the base 2. The base 2 is a hollow structure, and the fine-tuning mechanism 3 is fixed on the base 2.

[0027] The fine-tuning mechanism 3 includes a fixed frame 31, a first movable frame 32, and a second movable frame 33. The fixed frame 31 is fixedly connected to the top surface of the base 2. The first movable frame 32 is mounted on the fixed frame 31, and the second movable frame 33 is mounted on the first movable frame 32. The first movable frame 32 can move along a straight line on the fixed frame 31, and the second movable frame 33 can move along a straight line on the first movable frame 32. The movement directions of the first movable frame 32 and the second movable frame 33 are perpendicular to each other. The movement direction of the first movable frame 32 can be defined as the x-direction, and the movement direction of the second movable frame 33 can be defined as the y-direction. That is, the first movable frame 32 can move back and forth in the x-direction, and the second movable frame 33 can move back and forth in the y-direction, thereby covering all coordinates within the coordinate system formed by the travel distances of the first movable frame 32 and the second movable frame 33 in both directions.

[0028] The wire feeding mechanism 4 is fixed to the second movable frame 33. The wire feeding mechanism 4 includes a base plate 41 and a spool 42. The base plate 41 is fixed to the second movable frame 33, and its center has a hollow structure. The spool 42 is mounted on the base plate 41, and piano wire 43 is wound around it. Here, the piano wire 43 acts as a plumb line. The piano wire 43 is a high-strength carbon steel material, manufactured through lead bath quenching and cold drawing processes. It has high tensile strength and can withstand heavy weights, thus ensuring the plumb line is straight and points vertically, while preventing it from breaking. The fixed end of the piano wire 43 is connected to the spool 42, and the piano wire 43 is wound around the spool 42. The center of the base plate 41 is hollow. The second moving frame 33, the first moving frame 32, and the fixed frame 31 are all frame structures with hollow centers. The center of the base 2 is also a hollow structure. Therefore, the free end of the piano wire 43 passes through the center of the base plate 41, the second moving frame 33, the first moving frame 32, the fixed frame 31, and the center of the base 2 in sequence and hangs down to connect the plumb bob.

[0029] In this embodiment, the positioning device applied to the motor uses the overlapping leg 1 as the main force-bearing structure, straddling the motor. When the position of the piano wire 43 needs to be fine-tuned, it is not necessary to move the entire device. Instead, only the first moving frame 32 and the second moving frame 33 on the fine-tuning mechanism 3 need to be moved to move the piano wire 43. Since only a small force is needed to move the first moving frame 32 and the second moving frame 33, the controllability of the moving distance of the first moving frame 32 and the second moving frame 33 by the force of the human hand is higher. This makes the adjustment of the plumb line more accurate and stable and saves more time during the alignment and positioning of the axial flow pump and the motor.

[0030] In a preferred embodiment of this utility model, such as Figure 2 and Figure 3 As shown, the fixed frame 31 is provided with a first side plate 311 and a horizontally oriented first lead screw 312. The first lead screw 312 passes through the first side plate 311 and the first movable frame 32, and is rotatably mounted on the first side plate 311. The first lead screw 312 is threadedly connected to the first movable frame 32, and a rocker arm is provided at the end of the first lead screw 312. The first side plate 311 acts as a bearing for the first lead screw 312, allowing the first lead screw 312 to rotate freely within it. The first movable frame 32 is provided with a second side plate 321 and a horizontally oriented second lead screw 322. The second lead screw 322 passes through the second side plate 321 and the second movable frame 33, and is rotatably mounted on the second side plate 321. The second lead screw 322 is threadedly connected to the second movable frame 33, and a rocker arm is provided at the end of the second lead screw 322. The second side plate 321 acts as a bearing for the second lead screw 322, allowing the second lead screw 322 to rotate freely within it. Since the moving directions of the first moving frame 32 and the second moving frame 33 are perpendicular to each other, the first lead screw 312 and the second lead screw 322 should also be perpendicular to each other. Both the rocker arm of the first lead screw 312 and the rocker arm of the second lead screw 322 operate on a wheel and axle principle; rotating the rocker arm rotates both the first lead screw 312 and the second lead screw 322. When the first lead screw 312 rotates, the first moving frame 32 moves forward or backward along the thread on the first lead screw 312, thus enabling fine-tuning of the position of the first moving frame 32 by rotating the first lead screw 312. When the second lead screw 322 rotates, the second moving frame 33 moves left or right along the thread on the second lead screw 322, thus enabling fine-tuning of the position of the second moving frame 33 by rotating the second lead screw 322. This embodiment achieves fine-tuning of the position of the vertical line by setting the first lead screw 312 and the second lead screw 322 to realize the first moving frame 32 and the second moving frame 33.

[0031] In a preferred embodiment of this utility model, such as Figure 4As shown, the spool 42 is mounted on the base plate 41 via two spool clamps 44, which are vertically fixed to the base plate 41. The spool 42 is rotatably mounted between the two spool clamps 44, and a rocker arm is provided at one end of the spool 42. The rocker arm of the spool 42 operates on the principle of a wheel and axle structure; rotating the rocker arm rotates the spool 42 to retract or release the piano wire 43.

[0032] Furthermore, such as Figure 4 and Figure 5 As shown, a ratchet 45 is provided on one side of the spool 42, and a pawl 46 that cooperates with the ratchet 45 is provided on the inner side of the spool clamp 44 near the ratchet 45. A hand-operated protrusion 461 is provided on the pawl 46, which can rotate to adjust the position of the pawl 46. When the spool 42 rotates forward, it retracts the piano wire 43. At this time, the pawl 46 will not jam the ratchet 45, and the spool 42 rotates smoothly. When the spool 42 rotates in the reverse direction, the pawl 46 jams the ratchet 45, preventing the ratchet 45 from rotating, and consequently, the spool 42 cannot rotate. The piano wire 43 will not be released uncontrollably. To release the wire, simply move the hand-operated protrusion 461 to lift the pawl 46, allowing the spool 42 to rotate in the reverse direction and release the wire normally. When the desired length of wire is released, lower the pawl 46, locking the ratchet 45, and the spool 42 will no longer rotate.

[0033] This embodiment achieves the connection and retraction of piano wire 43 by setting up a base plate 41, a spool clamp 44, a rocker arm, and other structures, and achieves the control of the rotation of spool 42 by setting up a ratchet 45 and a pawl 46.

[0034] In a preferred embodiment of this utility model, such as Figure 4 As shown, a cross-shaped positioning structure 411 is provided at the center of the base plate 41, and a wire hole is provided at the center of the cross-shaped positioning structure 411. A plumb hook 47 is connected to the free end of the piano wire 43. In this embodiment, by setting the cross-shaped positioning structure 411 at the center of the base plate 41, an accurate guiding path is provided for the piano wire 43, ensuring that the piano wire 43 remains vertical and stable during positioning, thereby improving the accuracy and consistency of positioning. The rigid design of the cross-shaped positioning structure 411 effectively reduces the swaying or deviation of the piano wire 43 under force, enhancing the stability and reliability of the positioning device. The connection between the free end of the piano wire 43 and the plumb hook 47, which connects to the plumb bob, facilitates the installation and removal of the plumb bob.

[0035] In a preferred embodiment of this utility model, such as Figure 2 and Figure 3As shown, the base 2 includes a first annular plate 21, a second annular plate 22, and several trapezoidal plates 23. The radius of the first annular plate 21 is larger than that of the second annular plate 22. The first annular plate 21 is located below the second annular plate 22. The first annular plate 21 and the second annular plate 22 are fixedly connected by trapezoidal plates 23. The number of trapezoidal plates 23 is not less than three, and the trapezoidal plates 23 are evenly distributed on the edge of the second annular plate 22. Figure 6 As shown, the two ends of the overlapping leg 1 are retractable. The solid structures on either side of the device's placement position can be considered as the banks of a river. When the distance between the banks is small, the overlapping leg 1 does not need to be extended; it can simply be placed in the middle of the banks at its original size. When the distance between the banks is large, the overlapping leg 1 can be extended so that both ends of the overlapping leg 1 can reach the banks, thus still being placed in the middle of the banks. In this embodiment, the base 2 is designed as a frustum shape with a hollow center, allowing technicians to easily reach their hands into the base 2 from the side for operation, improving ease of operation. Simultaneously, the absence of sharp edges enhances safety. The retractable structure of the overlapping leg 1 allows the positioning device applied to the motor to be used in various environments.

[0036] The working principle of the positioning device for motors in this utility model is as follows: First, a large motor with its stator removed is hoisted above the axial flow pump for rough alignment. The length of the overlapping leg 1 is adjusted so that the positioning device can rest on the solid structure above the motor. The positioning device is then placed above the motor. Next, a plumb bob is connected to the hook 47 at the free end of the piano wire 43, allowing the piano wire 43 to hang naturally. The rocker arm of the spool 42 is rotated to slowly release the piano wire 43 until it reaches the required length. Rotation of the spool 42 is stopped, and the spool 42 is locked by the ratchet 45 and pawl 46, fixing the released length of the piano wire 43. Then, the length of the piano wire 43 is measured. 3. Based on the distances from the inner wall of the axial flow pump in all directions, move the positioning device applied to the motor to a position close to the shaft center of the axial flow pump. Then, rotate the rocker arm of the first lead screw 312 and the second lead screw 322 to fine-tune the position of the piano wire 43 until the piano wire 43 is located at the shaft center of the axial flow pump. Next, using the position of the piano wire 43 as a reference, adjust the position of the motor so that the piano wire 43 is located at the shaft center of the motor. Finally, remove the plumb bob from the piano wire 43, retract the piano wire 43, remove the positioning device applied to the motor, assemble the motor in its current position, and connect the motor to the axial flow pump to complete the installation of the axial flow pump and motor.

[0037] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A positioning device for an electric machine, characterized in that, include: Overlapping legs, base, fine-tuning mechanism, and wire feeding mechanism. There are two overlapping legs, which are parallel to each other. Both overlapping legs are located below the base and are fixedly connected to the base. The base is a hollow structure, and the fine-tuning mechanism is fixed on the base. The fine-tuning mechanism includes a fixed frame, a first movable frame, and a second movable frame. The fixed frame is fixedly connected to the top surface of the base. The first movable frame is mounted on the fixed frame, and the second movable frame is mounted on the first movable frame. The first movable frame can move along a straight line on the fixed frame, and the second movable frame can move along a straight line on the first movable frame. The moving directions of the first movable frame and the second movable frame are perpendicular to each other. The wire feeding mechanism includes a base plate and a spool. The base plate is fixed to the second movable frame. The center of the base plate has a hollow structure. The spool is installed on the base plate. Piano wire is wound on the spool. The free end of the piano wire passes through the center of the base plate, the second movable frame, the first movable frame, the fixed frame, and the center of the base in sequence and hangs down to connect to the plumb bob.

2. The positioning device for a motor according to claim 1, characterized in that, The fixed frame is provided with a first side plate and a first lead screw in a horizontal direction. The first lead screw passes through the first side plate and the first movable frame. The first lead screw is rotatably mounted on the first side plate. The first lead screw is threadedly connected to the first movable frame. A rocker arm is provided at the end of the first lead screw. The first movable frame is provided with a second side plate and a second lead screw in a horizontal direction. The second lead screw passes through the second side plate and the second movable frame. The second lead screw is rotatably mounted on the second side plate. The second lead screw is threadedly connected to the second movable frame. A rocker arm is provided at the end of the second lead screw.

3. The positioning device for electric machines according to claim 1, characterized in that, The spool is mounted on the base plate via two spool clamps. The spool clamps are fixed vertically to the base plate, and the spool is rotatably mounted between the two spool clamps. One end of the spool is provided with a rocker arm.

4. The positioning device for a motor according to claim 3, characterized in that, A ratchet is provided on one side of the spool, and a pawl that cooperates with the ratchet is provided on the inner side of the spool clamp plate near the ratchet.

5. The positioning device for a motor according to claim 4, characterized in that, The pawl is provided with a hand-operated protrusion, which can be rotated to adjust the position of the pawl.

6. The positioning device for electric machines according to claim 1, characterized in that, The base plate has a cross-shaped positioning structure at its center, and the cross-shaped positioning structure has a wire hole at its center.

7. The positioning device for a motor according to claim 1, characterized in that, The base includes a first annular plate, a second annular plate, and several trapezoidal plates. The radius of the first annular plate is larger than that of the second annular plate. The first annular plate is located below the second annular plate. The first annular plate and the second annular plate are fixedly connected by the trapezoidal plates. The number of trapezoidal plates is not less than three, and the trapezoidal plates are evenly distributed on the edge of the second annular plate.

8. The positioning device for electric machines according to claim 1, characterized in that, The two ends of the overlapping leg are retractable.

9. The positioning device for a motor according to claim 1, characterized in that, The free end of the piano wire is connected to a hook.

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