CN110932492A - Safe and reliable platform for core-pulling assembly and maintenance of medium-and large-sized motors - Google Patents
Safe and reliable platform for core-pulling assembly and maintenance of medium-and large-sized motors Download PDFInfo
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- CN110932492A CN110932492A CN201911325521.3A CN201911325521A CN110932492A CN 110932492 A CN110932492 A CN 110932492A CN 201911325521 A CN201911325521 A CN 201911325521A CN 110932492 A CN110932492 A CN 110932492A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
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Abstract
The invention discloses a safe and reliable platform for core-pulling assembly and maintenance of a medium-large motor, which comprises a platform base, and is characterized by further comprising a workpiece turntable pulley, a supporting shaft bracket and a lengthened dummy shaft connected with a motor rotor; sliding guide rails are arranged on the platform base, and sliding plates matched with the sliding guide rails are arranged at the bottoms of the workpiece turntable pulley and the support shaft pulley; the middle part of the shaft supporting pulley is provided with a lifting platform, and the upper part of the shaft supporting pulley is provided with a roller for supporting a shaft; the supporting shaft bracket comprises a fixed supporting shaft bracket and a movable supporting shaft bracket, the bottom of the fixed supporting shaft bracket is fixedly connected with the sliding guide rail, and the upper part of the fixed supporting shaft bracket is provided with a rotatable supporting roller; the bottom of the movable carrier roller bracket is provided with a sliding plate matched with the sliding guide rail, and the upper part of the movable carrier roller bracket is provided with a carrier roller. The invention realizes the core extracting and assembling process of the medium and large motor to be as semi-automatic as possible, safe and controllable, avoids the risk of secondary damage of the motor in the core extracting and assembling process, and realizes the purposes of improving the assembling and overhauling quality, reducing cost and improving efficiency.
Description
Technical Field
The invention relates to a safe and reliable platform for core-pulling assembly and maintenance of a medium-sized and large-sized motor, and belongs to the technical field of assembly and maintenance of large-sized motors.
Background
The rotor needs to be installed in or taken out of the stator when the medium-large motor is assembled in a manufacturing plant and overhauled by a user. The self-weight of the rotor and the stator of the motors with different specifications is usually between several tons or hundreds of tons, so the work intensity of the drawing and assembling core is high and needs to be careful. When the medium-large motor component assembly is assembled after being manufactured and when a user base centralizes project maintenance, a rotor weighing several tons or dozens of tons needs to be installed in a stator cavity or extracted from the stator cavity. The core pulling and installing method is mainly two traditional methods aiming at core pulling and core installing of a motor rotor, as shown in figures 1 and 2, the core pulling and installing method is carried out by means of a bridge (door) type crane and a forklift, and is matched with a balance beam, a dummy shaft, a jack and the like, and because the gap between a stator and a rotor of the motor is small, and the cooperativity of multi-machine and multi-person operation is poor, the phenomena of mechanical friction between the rotor and the stator, iron core slot wedge damage, stator winding insulation damage (particularly the part exposed out of the iron core) and the like are easy.
In the first method, as shown in fig. 1, a special large and thick carrying pole is lifted by a lifting machine (a travelling crane in a workshop) and is placed in a balanced horizontal manner, and 1 loop chain hoist with proper tonnage is hung at each of two ends of the special large and thick carrying pole. The calabash also plays a role in adjusting the rotor clearance while bearing the weight of the rotor (the stator-rotor clearance is usually about 2 mm). In order to enable the rotor to move out of the stator core at a certain distance, a specially-made extension dummy shaft is sleeved at the driving end of the motor. During core pulling operation, firstly removing accessories such as bearings at two ends of a motor, firstly hoisting a carrying pole by a crane, slowly and manually hoisting a rotor by a hoist when the carrying pole is uniformly stressed, observing an annular gap between the stator and the rotor at any time during operation, basically enabling the rotor to be positioned in the middle of a stator cavity by controlling and adjusting the lifting amount of the chain block in different directions, and slightly operating the hoisting machinery to enable the carrying pole to move in a direction parallel to a rotor shaft until the rotor is completely moved to the outside of the stator. During the translation, the hand-operated hoist also needs to continuously adjust the clearance of the stator and the rotor or the deviation in the direction, otherwise, the iron core or the stator winding can be damaged.
The second method is shown in fig. 2, and similar to method 1, eliminates the balance 'carrying pole' and chain block lifted by the overhead travelling crane, and is assisted by a special gantry crane or a rail type pulley (the device is provided in Shanghai electric machinery factory) or a temporary forklift. During core pulling operation, a 'dummy shaft' is arranged, so that a hoisting crown block, a portal crane or a forklift and the like are matched and act simultaneously when the rotor is positioned in the middle of the stator cavity, the rotor is pulled out of the stator cavity, and the 'hand changing' of a sling is performed for several times in the process. The second approach is more demanding for operations involving synchronization of the hoisting machinery.
The method of installing the rotor into the stator is the same as above.
At present, the method is still completed by means of the combination of hoisting machinery, a gantry crane or a forklift and the matching of auxiliary tools such as a cross arm suspender, a manual hoist and the like. The operation involves many equipment, and the cooperation synchronism is poor, and balanced handle is controlled the difficulty greatly, and work efficiency is low, goes out equipment operation and incident easily. The rotor and the stator are damaged by collision slightly improperly, the insulation of the stator winding is damaged, particularly the stator end winding exposed out of the iron core is easy to damage by collision, for example, the two methods have low efficiency, high responsibility and high synchronous driving performance of equipment, and the stator and the rotor are easy to collide with each other.
In summary, the prior art has the following disadvantages:
① the stator of large motor is usually in the form of non-detachable whole, the core drawing and assembling of the motor must be completed by using a 'dummy shaft' for extension to penetrate through the stator, so the tooling with higher automation degree is difficult to design and implement.
② the large motor has scattered use points and limited quantity, and the frequency of loose core large repair is not high, so the scattered households are reluctant to invest in tools with higher cost.
③ the large and medium-sized motor has heavy whole mass, long longitudinal distance and small air gap (usually about 2mm), if a tool with certain transmission precision and maneuvering configuration is designed, the investment is large, and the interest of customers who use the large and medium-sized motor is not high.
Disclosure of Invention
The invention aims to solve the technical problem of how to safely and conveniently realize core-pulling assembly and maintenance of medium and large motors.
In order to solve the technical problems, the technical scheme of the invention provides a safe and reliable platform for core-pulling assembly and maintenance of a medium-large motor, which comprises a platform base and is characterized by further comprising a workpiece turntable pulley, a shaft supporting bracket and a lengthened dummy shaft connected with a motor rotor; sliding guide rails are arranged on the platform base, and sliding plates matched with the sliding guide rails are arranged at the bottoms of the workpiece turntable pulley and the support shaft pulley; the middle part of the shaft supporting pulley is provided with a lifting platform, and the upper part of the shaft supporting pulley is provided with a roller for supporting a shaft; the supporting shaft bracket comprises a fixed supporting shaft bracket and a movable supporting shaft bracket, the bottom of the fixed supporting shaft bracket is fixedly connected with the sliding guide rail, and the upper part of the fixed supporting shaft bracket is provided with a rotatable supporting roller; the bottom of the movable carrier roller bracket is provided with a sliding plate matched with the sliding guide rail, and the upper part of the movable carrier roller bracket is provided with a carrier roller.
Preferably, the carrier roller is of a V-shaped structure.
Preferably, the fixed carrier roller bracket and the movable carrier roller bracket are provided with lifting platforms in the middle.
Aiming at the current situation that a safe and reliable core pulling and assembling facility does not exist in medium and large motors, the invention provides a safe and reliable platform which greatly reduces the operation intensity and equipment configuration and is used for pulling cores during the assembly or maintenance of the medium and large motors. The motor is suitable for middle and large motors with a certain range of center height, the principle of a guide rail and a workbench of a horizontal type metal cutting boring machine is used for reference, the whole motor to be repaired or a stator to be assembled is placed on the workbench, the rotor is kept still through the adjustment of an auxiliary shaft supporting mechanism, and the stator moves in the parallel direction parallel to the axis of the rotor, so that the 'heavy' rotor is stably pulled out or pushed in under the condition of meeting small clearance in a stator cavity on the premise of not contacting with a stator core and a winding coil.
The invention provides a set of semi-automatic working platform which can be used for integrating medium and large motor assembly, repair (bearing/bearing seat replacement, stator and rotor core pulling removal, air gap retest and the like), insulation life and operation parameter test, realizes the core pulling and assembling process of the medium and large motor to be semi-automatic as much as possible, is safe and controllable, avoids the risk of secondary damage of the motor in the core pulling and assembling process, and achieves the purposes of improving the assembly and maintenance quality, reducing cost and improving efficiency.
The invention is applicable to objects including:
1. the stator of the medium-large motor is usually in a form of a non-detachable whole, and the core drawing and assembling of the motor can be completed only by using a lengthened 'dummy shaft' to penetrate through the stator, so that the tool with a slightly high automation degree is difficult to design and implement.
2. The use points of medium and large motors are dispersed, the number is limited, and the loose core repair frequency is not high, so that scattered households are reluctant to invest tools with higher cost.
3. The medium-large motor has heavy overall mass, long longitudinal distance and small air gap (usually about 2mm), and if a tool with certain transmission precision and maneuvering configuration is designed, the investment is large, and the interest of customers who use the medium-large motor is not high.
Drawings
FIG. 1 illustrates a core extracting and assembling method of a conventional rotor in the prior art;
FIG. 2 illustrates a core extracting and assembling method II for a conventional rotor in the prior art;
FIG. 3 is a schematic view showing the arrangement of core-loading operation equipment of the assembly and maintenance platform;
FIG. 4 is a schematic view of the arrangement of core pulling operation equipment of the platform for assembly and maintenance;
wherein, 1 represents a workpiece turntable pulley, 2 represents a bearing shaft pulley, 3a fixed bearing shaft bracket, 3b represents a movable bearing shaft bracket, 4 represents a sliding guide rail, 5 represents an extension dummy shaft, 6 represents a motor rotor, the X direction is the direction of the sliding guide rail, the Y direction is the horizontal direction vertical to the direction of the sliding guide rail, and the Z direction is the vertical direction.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Examples
The main components of the invention comprise:
1. workpiece turntable pulley 1: the motor to be repaired or the stator to be assembled is arranged on the workbench surface, and the motor has the functions of motor displacement in the direction of X, Y and manual rotation. The displacement in the X direction is used for core pulling or core loading; the displacement in the Y direction and the rotation of the workbench are used for adjusting the axis of the motor to be parallel to the central line of the guide rail matched with the workbench. The workpiece turntable pulley is provided with a handheld centralized operation box.
2. And (3) a shaft supporting pulley 2: the function is to support the false shaft after adjusting the position according to the center height and the length of the motors with different models, and the function of maneuvering displacement in the X direction and manual lifting in the Z direction is provided. The lower layer is a sliding plate matched with the guide rail; the middle layer is a platform which can lift in the Z direction; the upper layer is a roller of a support shaft, and the table top can be selectively provided with a hydraulic puller.
3. A supporting shaft bracket: the purpose is to support the rotor shaft, and the rotor shaft is fixed and slides. Structurally similar to the axle carrier, the axle carrier can be maneuvered in the "X" direction, while the axle carrier does not, but can be manually fixed to the guide rail. The fixed type supporting shaft bracket 3a is fixed on the guide rail, and the supporting roller can rotate flexibly and can be used optionally. The movable supporting shaft bracket 3b can be hung up and hung down for flexible use, and the supporting roller is unpowered.
4. The slide rail 4: the guide device is used for guiding a workpiece turntable pulley, a supporting shaft pulley and a supporting shaft bracket to move in the X direction, and the guide device is required to move smoothly without clamping stagnation by adopting a form similar to a steel frame and X-shaped linear guide rail combination or a metal cutting machine tool.
The core pulling operation steps are as follows:
1. the whole motor to be repaired is hoisted on the workpiece turntable pulley 1, an end cover and other accessories are removed, and then a matched proper extension dummy shaft 5 is installed.
2. According to the overall dimension and the actual position of the motor, the displacement of the direction of the rotary table and the displacement of the Y direction are adjusted through a rotating hand wheel on the workpiece rotary table pulley 1, so that the axial direction of the motor to be repaired is ensured to be parallel to the sliding guide rail 4 and to be aligned with the center of a V-shaped shaft supporting mechanism of the fixed shaft supporting bracket 3 a.
3. The wheelbase of the carrier roller on the fixed type carrier roller bracket 3a is adjusted to adapt to the diameter of the shaft of the motor to be repaired and is properly supported. The lifting platform (Z direction) on the fixed shaft supporting bracket 3a is adjusted to lead the shaft outlet end of the rotor to be supported on the V-shaped carrier roller of the fixed shaft supporting bracket 3 a.
4. The axle distance of the carrier rollers on the shaft-supporting pulley 2 is adjusted to adapt to the axle diameter of the end of the extension dummy shaft 5 of the motor to be repaired, and the motor to be repaired is properly supported. The lifting platform (Z direction) on the shaft-supporting pulley 2 is adjusted to enable the end of the rotor lengthening dummy shaft 5 to be erected on the V-shaped carrier roller of the shaft-supporting pulley 2, and the shaft-supporting pulley 2 is braked.
5. And observing and measuring the clearance between the stator and the rotor, and finely adjusting the direction of the shaft supporting bracket 3 and the shaft supporting pulley 2Z so as to position the rotor at the center of the stator cavity and ensure the uniform clearance around the rotor.
6. The motor-driven workpiece turntable pulley 1 moves towards the lengthening dummy shaft 5 side along the X direction, and the stator is transferred to the shaft supporting pulley 2 side at the end of the lengthening dummy shaft 5 until the whole rotor is exposed.
7. When necessary, one end of the rotor shaft (the shaft extending end close to one side of the lengthened dummy shaft 5 but not contacting the lengthened dummy shaft 5.) is supported by the movable shaft supporting bracket 3b, the dummy shaft is removed by a travelling crane and a plough type core pulling pipe, and the core pulling operation is finished.
The core loading operation steps are as follows:
1. the stator is placed on the workpiece turntable pulley 1 and adjusted according to a corresponding method, so that the center of the stator cavity is parallel to the center of the sliding guide rail 4.
2. One end of the rotor shaft is arranged on the fixed type supporting shaft bracket 3a, and the other end of the rotor shaft is supported by the movable type supporting shaft bracket 3b, is inserted with a proper dummy shaft and is balanced.
3. After the extension dummy shaft 5 is installed, the end of the extension dummy shaft 5 is supported by the shaft supporting pulley 2, and the shaft supporting pulley 2 is braked on the guide rail.
4. The distance between the roller shafts on the fixed type supporting shaft bracket 3a and the supporting shaft pulley 2 and the height of the V-shaped supporting roller are respectively adjusted.
5. Confirming that the rotor shaft and the extension dummy shaft 5 are reliably supported, dismantling the movable shaft support 3b and ensuring uniform clearance around the stator and the rotor.
6. And driving the workpiece turntable pulley 1 with the stator placed to move towards the fixed supporting shaft bracket 3a in the X direction, observing the annular gap between the stator and the rotor, and correspondingly adjusting the annular gap when needed until the rotor completely enters a stator winding area, and overlapping and aligning the stator core and the rotor core.
7. The heights of the shaft supporting pulley 2 and the fixed shaft supporting bracket 3a are slowly adjusted downwards, so that the rotor is lightly placed in the stator cavity.
8. The false shaft is removed by a travelling crane and a plough type core pulling pipe, and the rotor is installed.
Claims (3)
1. A safe and reliable platform for core-pulling assembly and maintenance of medium and large motors comprises a platform base and is characterized by further comprising a workpiece turntable pulley (1), a shaft supporting pulley (2), a shaft supporting bracket and a lengthened dummy shaft (5) connected with a motor rotor; a sliding guide rail (4) is arranged on the platform base, and sliding plates matched with the sliding guide rail (4) are arranged at the bottoms of the workpiece turntable pulley (1) and the shaft supporting pulley (2); the middle part of the shaft supporting pulley (2) is provided with a lifting platform, and the upper part of the shaft supporting pulley is provided with a roller for supporting a shaft; the supporting shaft bracket comprises a fixed supporting shaft bracket (3a) and a movable supporting shaft bracket (3b), the bottom of the fixed supporting shaft bracket (3a) is fixedly connected with the sliding guide rail (4), and the upper part of the fixed supporting shaft bracket is provided with a rotatable supporting roller; the bottom of the movable carrier roller bracket (3b) is provided with a sliding plate matched with the sliding guide rail (4), and the upper part is provided with a carrier roller.
2. A safe and reliable platform for assembling and overhauling the loose core of a medium and large motor according to claim (1), wherein the carrier roller has a V-shaped structure.
3. A safe and reliable platform for assembling and overhauling the loose core of a medium and large motor according to claim 1, wherein a lifting platform is arranged in the middle of the fixed carrier roller bracket (3a) and the movable carrier roller bracket (3 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911325521.3A CN110932492A (en) | 2019-12-20 | 2019-12-20 | Safe and reliable platform for core-pulling assembly and maintenance of medium-and large-sized motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911325521.3A CN110932492A (en) | 2019-12-20 | 2019-12-20 | Safe and reliable platform for core-pulling assembly and maintenance of medium-and large-sized motors |
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| Publication Number | Publication Date |
|---|---|
| CN110932492A true CN110932492A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911325521.3A Pending CN110932492A (en) | 2019-12-20 | 2019-12-20 | Safe and reliable platform for core-pulling assembly and maintenance of medium-and large-sized motors |
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| Country | Link |
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| CN (1) | CN110932492A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928874A (en) * | 2020-12-28 | 2021-06-08 | 吕骏元 | Pre-core-pulling mechanism on full-automatic motor stator assembly production line |
| CN113664480A (en) * | 2021-09-22 | 2021-11-19 | 广州文船重工有限公司 | Method for controlling precision of shaft hole of main body of hanging beam |
| CN115416825A (en) * | 2022-08-11 | 2022-12-02 | 沪东中华造船(集团)有限公司 | Ship electric propulsion motor rotor extraction method and adjustable support bearing |
-
2019
- 2019-12-20 CN CN201911325521.3A patent/CN110932492A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928874A (en) * | 2020-12-28 | 2021-06-08 | 吕骏元 | Pre-core-pulling mechanism on full-automatic motor stator assembly production line |
| CN113664480A (en) * | 2021-09-22 | 2021-11-19 | 广州文船重工有限公司 | Method for controlling precision of shaft hole of main body of hanging beam |
| CN115416825A (en) * | 2022-08-11 | 2022-12-02 | 沪东中华造船(集团)有限公司 | Ship electric propulsion motor rotor extraction method and adjustable support bearing |
| CN115416825B (en) * | 2022-08-11 | 2024-06-11 | 沪东中华造船(集团)有限公司 | Ship electric propulsion motor rotor extraction method and adjustable support bearing |
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