Large motor rotor extraction tool for motor maintenance

Abstract

The utility model discloses a large-scale motor rotor extraction tool for motor maintenance, and solves the problem of how to simply extract a motor rotor during on-site maintenance of a large-scale motor. An electronic control hydraulic left lifting jack (2) is arranged at the left end of a platen base (1), an electronic control hydraulic right lifting jack (4) is arranged at the right end of the platen base (1), and a left-right translation sliding trolley (6) is movably arranged in the middle of the top end face of the platen base. A left side horizontal supporting rod (3) is arranged on an upward extending shaft of the electric control hydraulic left side lifting jack, and a right side horizontal supporting rod (5) is arranged on an upward extending shaft of the electric control hydraulic right side lifting jack (4); a motor base and a stator (7) are arranged on the left-right translation sliding trolley, a left end shaft extension (8) of a motor rotor (10) is arranged on a left arc-shaped supporting plate (21), and a right end shaft extension (9) of the motor rotor is arranged on a right arc-shaped supporting plate (22); the field operation is simple and fast.

Description

Technical Field

[0001] The present invention relates to an overhaul tooling for large motors, and particularly to a tooling for extracting the rotor of a large motor for motor overhaul. Background Art

[0002] Low-voltage motors are one of the most common equipment in the workshops of industrial enterprises (such as power plants, chemical plants, and machinery processing plants), and are characterized by a large number and wide distribution; when overhauling low-voltage motors or when faults occur inside the low-voltage motor body, disassembly and overhaul operations will be carried out on the low-voltage motor, and the stator interior and the rotor will be inspected for their conditions. It is necessary to extract the low-voltage motor rotor from the stator on site; for motor rotors with relatively light weights, only by human cooperation to lift both ends of the rotor and create an appropriate gap between the stator and the rotor, the rotor can be extracted or inserted; however, for large motors with relatively heavy rotors, special auxiliary tools developed in cooperation with lifting machinery (such as overhead cranes, electric hoists, chain hoists, slings, etc.) are required to carry out the extraction work of the low-voltage motor rotor. This method requires the cooperation of lifting machinery for hoisting, and there are relatively many cooperating personnel during the process, which is too troublesome, and the working area is relatively fixed (it needs to be implemented in a site equipped with an electric hoist or an overhead crane); how to develop a device that is movable, does not require the cooperation of lifting machinery during the operation process, has little limitation on the working position, is simple to adjust, has a wide range of uses, not only has specificity but also has a certain degree of generality, and can well meet the tooling for extracting and inserting rotors of most specifications of low-voltage motors has become a problem that needs to be solved at the overhaul construction site. Summary of the Invention

[0003] The present invention provides a tooling for extracting the rotor of a large motor for motor overhaul, and solves the technical problem of how to simply extract the motor rotor during on-site overhaul of large motors.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A large motor rotor extraction tooling for motor maintenance, including a rectangular platen base, a motor housing and a stator. A motor rotor is arranged in the motor housing and the stator. An electronically controlled hydraulic left lifting jack is arranged at the left end of the platen base, and an electronically controlled hydraulic right lifting jack is arranged at the right end of the platen base. A left-right translation sliding trolley is movably arranged in the middle of the top surface of the platen base; on the upward extending shaft of the electronically controlled hydraulic left lifting jack, a left horizontal support rod is arranged, and a left arc-shaped support plate is arranged at the right end of the left horizontal support rod. On the upward extending shaft of the electronically controlled hydraulic right lifting jack, a right horizontal support rod is arranged, and a right arc-shaped support plate is arranged at the left end of the right horizontal support rod; the motor housing and the stator are arranged on the left-right translation sliding trolley. The left end shaft extension of the motor rotor is arranged on the left arc-shaped support plate, and the right end shaft extension of the motor rotor is arranged on the right arc-shaped support plate; the left lifting jack hydraulic oil quick connector on the electronically controlled hydraulic left lifting jack is connected to the first interface of the three-way through a left hydraulic oil branch pipe, and the right lifting jack hydraulic oil quick connector on the electronically controlled hydraulic right lifting jack is connected to the second interface of the three-way through a right hydraulic oil branch pipe. The third interface of the three-way is connected to a hydraulic station through a hydraulic oil main pipe.

[0006] The rectangular platen base is composed of a left zigzag platen, a middle zigzag platen and a right zigzag platen spliced together; a set of left vertical bolts are arranged on the left zigzag platen, and the electronically controlled hydraulic left lifting jack is arranged on the left zigzag platen through a set of left vertical bolts. A set of right vertical bolts are arranged on the right zigzag platen, and the electronically controlled hydraulic right lifting jack is arranged on the right zigzag platen through a set of right vertical bolts.

[0007] A left universal wheel pair is connected to the lower left end of the left zigzag platen, a middle universal wheel pair is connected below the middle zigzag platen, and a right universal wheel pair is connected to the lower right end of the right zigzag platen; a left cushion plate is arranged between the electronically controlled hydraulic left lifting jack and the left zigzag platen, and a right cushion plate is arranged between the electronically controlled hydraulic right lifting jack and the right zigzag platen; a push handle is connected to the right end of the right zigzag platen.

[0008] A working method of a large motor rotor extraction tooling for motor maintenance is characterized by the following steps:

[0009] First step, place the motor to be pre-maintained on the left-right translation sliding trolley, remove the drive end cover and non-drive end cover of the motor, and respectively adjust the positions of the left horizontal support rod and the right horizontal support rod so that the left end shaft extension of the motor rotor is arranged on the left arc-shaped support plate arranged at the right end of the left horizontal support rod, and the right end shaft extension of the motor rotor is arranged on the right arc-shaped support plate arranged at the left end of the right horizontal support rod;

[0010] Step 2: Control the electro-hydraulic left lifting jack and the electro-hydraulic right lifting jack through the hydraulic station to lift synchronously, lift the motor rotor, and create an annular gap between the motor rotor and the motor base and stator. At the same time, remove the bearings at the drive end and non-drive end of the motor.

[0011] Step 3: Move the left and right translation sliding carts to the left, making the motor rotor suspended on the right side of the motor base and stator.

[0012] Step 4: Insert the rotor transfer cart under the suspended motor rotor.

[0013] Step 5: Control the electro-hydraulic left lifting jack and the electro-hydraulic right lifting jack through the hydraulic station to lower synchronously, place the motor rotor on the rotor transfer cart, and separate the left end shaft extension from the left arc-shaped support plate and the right end shaft extension from the right arc-shaped support plate.

[0014] Step 6: Move the rotor transfer cart backward to transfer the motor rotor to the maintenance station.

[0015] The rotor transfer cart is a flat cart. There is a U-shaped socket at the front end of the flat cart body, an arc-shaped support on the rotor transfer cart, and a cart push handle at the rear end of the flat cart body. The arc-shaped support is a liftable support.

[0016] The present invention has the characteristics of low operation cost for rotor extraction and insertion, high work efficiency, and safe and reliable operation process, greatly improving the maintenance efficiency of large motors and making on-site operation simple and fast. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a schematic structural diagram of the motor rotor 10 of the present invention after being extracted from the base;

[0019] Figure 3 is a schematic structural diagram of the motor rotor 10 of the present invention when being carried by the rotor transfer cart 11;

[0020] Figure 4 is a schematic structural diagram of the rotor transfer cart 11 of the present invention;

[0021] Figure 5 is a schematic structural diagram of the platen base 1 of the present invention after installing universal wheels;

[0022] Figure 6 is a schematic structural diagram of the platen base 1 of the present invention after adding a backing plate. Detailed Description of the Invention

[0023] The present invention will be described in detail below with reference to the embodiments:

[0024] A large motor rotor extraction tooling for motor maintenance, including a rectangular platen base 1, a motor frame and a stator 7. A motor rotor 10 is arranged in the motor frame and the stator 7. An electric control hydraulic left lifting jack 2 is arranged at the left end of the platen base 1, and an electric control hydraulic right lifting jack 4 is arranged at the right end of the platen base 1. A left-right translation sliding trolley 6 is movably arranged in the middle of the top surface of the platen base 1. Limit plates are respectively arranged on the front and rear sides of the left-right translation sliding trolley 6. The front limit plate is movably matched with the front side vertical surface of the platen base 1, and the rear limit plate is movably matched with the rear side vertical surface of the platen base 1, so as to prevent the left-right translation sliding trolley 6 from deviating when moving left and right; on the upward extending shaft of the electric control hydraulic left lifting jack 2, a left horizontal support rod 3 is arranged. A shaft sleeve is arranged at the top of the upward extending shaft. The left horizontal support rod 3 is inserted into the shaft sleeve. A set screw is arranged on the shaft sleeve to fix the left horizontal support rod 3 inserted in the shaft sleeve. A left arc-shaped support plate 21 is arranged at the right end of the left horizontal support rod 3. A right horizontal support rod 5 is arranged on the upward extending shaft of the electric control hydraulic right lifting jack 4, and a right arc-shaped support plate 22 is arranged at the left end of the right horizontal support rod 5; the motor frame and the stator 7 are arranged on the left-right translation sliding trolley 6. The left end shaft extension 8 of the motor rotor 10 is arranged on the left arc-shaped support plate 21, and the right end shaft extension 9 of the motor rotor 10 is arranged on the right arc-shaped support plate 22; the left lifting jack hydraulic oil quick connector 15 on the electric control hydraulic left lifting jack 2 is connected to the first interface of the three-way 19 through a left hydraulic oil branch pipe 17, and the right lifting jack hydraulic oil quick connector 16 on the electric control hydraulic right lifting jack 4 is connected to the second interface of the three-way 19 through a right hydraulic oil branch pipe 18. The third interface of the three-way 19 is connected to a hydraulic station through a hydraulic oil main pipe 20; the two lifting jacks are synchronously controlled by the hydraulic station to rise or fall synchronously.

[0025] The rectangular platen base 1 is composed of a left zigzag platen 28, a middle zigzag platen 29 and a right zigzag platen 30 spliced together; a set of left vertical bolts 32 are arranged on the left zigzag platen 28. The electric control hydraulic left lifting jack 2 is arranged on the left zigzag platen 28 through a set of left vertical bolts 32. A set of right vertical bolts 33 are arranged on the right zigzag platen 30. The electric control hydraulic right lifting jack 4 is arranged on the right zigzag platen 30 through a set of right vertical bolts 33. Adjacent platens are connected together by bolts.

[0026] At the lower left end of the left zigzag platen 28, a left universal wheel pair 25 is connected. Below the middle zigzag platen 29, a middle universal wheel pair 26 is connected. At the lower right end of the right zigzag platen 30, a right universal wheel pair 27 is connected. Between the electric control hydraulic left lifting jack 2 and the left zigzag platen 28, a left cushion plate 23 is provided. Between the electric control hydraulic right lifting jack 4 and the right zigzag platen 30, a right cushion plate 24 is provided. At the right end of the right zigzag platen 30, a push handle 31 is connected. The universal wheel pair is magnetically connected to the legs under the corresponding platen.

[0027] A working method of a large motor rotor extraction tooling for motor maintenance is characterized by the following steps:

[0028] First step: Place the motor to be maintained on the left and right translation sliding trolley 6, remove the drive end cover and non-drive end cover of the motor, and respectively adjust the positions of the left horizontal support rod 3 and the right horizontal support rod 5 so that the left end shaft extension 8 of the motor rotor 10 is set on the left arc-shaped support plate 21 provided at the right end of the left horizontal support rod 3, and the right end shaft extension 9 of the motor rotor 10 is set on the right arc-shaped support plate 22 provided at the left end of the right horizontal support rod 5.

[0029] Second step: Control the electric control hydraulic left lifting jack 2 and the electric control hydraulic right lifting jack 4 to lift synchronously through the hydraulic station, lift the motor rotor 10, so that there is an annular gap distance between the motor rotor 10 and the motor base and the stator 7. At the same time, remove the drive end bearing and non-drive end bearing of the motor.

[0030] Third step: Move the left and right translation sliding trolley 6 to the left so that the motor rotor 10 is suspended on the right side of the motor base and the stator 7.

[0031] Fourth step: Insert the rotor transfer trolley 11 under the suspended motor rotor 10.

[0032] Fifth step: Control the electric control hydraulic left lifting jack 2 and the electric control hydraulic right lifting jack 4 to descend synchronously through the hydraulic station, place the motor rotor 10 on the rotor transfer trolley 11, and make the left end shaft extension 8 disengage from the left arc-shaped support plate 21 and the right end shaft extension 9 disengage from the right arc-shaped support plate 22.

[0033] Sixth step: Move the rotor transfer trolley 11 backward to transfer the motor rotor 10 to the maintenance station.

[0034] The rotor transfer trolley 11 is a flat trolley. At the front end of the flat trolley body, a U-shaped socket 14 is provided. On the rotor transfer trolley 11, an arc-shaped support seat 12 is provided. At the rear end of the flat trolley body, a trolley push handle 13 is provided. The arc-shaped support seat 12 is a liftable support seat, and the lifting of the arc-shaped support seat 12 can be realized through a hydraulic system or completed through a lead screw system.

Claims

1. A large motor rotor extraction tool for motor maintenance, comprising a rectangular table base (1) and a motor base and stator (7), wherein a motor rotor (10) is arranged in the motor base and stator (7), characterized in that: An electro-hydraulic left-side lifting jack (2) is arranged at the left end of the table base (1), an electro-hydraulic right-side lifting jack (4) is arranged at the right end of the table base (1), and a left-right translation sliding trolley (6) is movably arranged in the middle of the top surface of the table base (1); a left-side horizontal support rod (3) is arranged on the upwardly extending shaft of the electro-hydraulic left-side lifting jack (2), and a left arc-shaped support plate (21) is arranged at the right end of the left horizontal support rod (3); a right-side horizontal support rod (5) is arranged on the upwardly extending shaft of the electro-hydraulic right-side lifting jack (4), and a right arc-shaped support plate (22) is arranged at the left end of the right horizontal support rod (5); and a left-right translation sliding trolley (6) is arranged The invention comprises a motor base and a stator (7), a left end shaft extension (8) of a motor rotor (10) is arranged on a left arc-shaped support plate (21), and a right end shaft extension (9) of the motor rotor (10) is arranged on a right arc-shaped support plate (22); a left lifting jack hydraulic oil quick connector (15) on an electric-controlled hydraulic left lifting jack (2) is connected to a first interface of a tee (19) through a left hydraulic oil branch pipe (17), a right lifting jack hydraulic oil quick connector (16) on an electric-controlled hydraulic right lifting jack (4) is connected to a second interface of the tee (19) through a right hydraulic oil branch pipe (18), and a third interface of the tee (19) is connected to a hydraulic station through a hydraulic oil main pipe (20).

2. A large motor rotor extraction tool for motor maintenance according to claim 1, characterized in that: The rectangular platform base (1) is composed of a left zigzag platform (28), a middle zigzag platform (29) and a right zigzag platform (30); a group of left vertical bolts (32) are arranged on the left zigzag platform (28); an electric-controlled hydraulic left lifting jack (2) is arranged on the left zigzag platform (28) through a group of left vertical bolts (32); a group of right vertical bolts (33) is arranged on the right zigzag platform (30); and an electric-controlled hydraulic right lifting jack (4) is arranged on the right zigzag platform (30) through a group of right vertical bolts (33).

3. A large motor rotor extraction tool for motor maintenance according to claim 1 or 2, characterized in that: A left universal wheel pair (25) is connected to the lower left end of the left zigzag platform (28), a middle universal wheel pair (26) is connected to the lower right end of the middle zigzag platform (29), and a right universal wheel pair (27) is connected to the lower right end of the right zigzag platform (30); a left pad (23) is arranged between the electric-controlled hydraulic left lifting jack (2) and the left zigzag platform (28), and a right pad (24) is arranged between the electric-controlled hydraulic right lifting jack (4) and the right zigzag platform (30); and a push handle (31) is connected to the right end of the right zigzag platform (30).

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