WO2020051943A1 - Grinding system for eliminating crack sources of inner tapered bore of motor rotating shaft and grinding method - Google Patents

Abstract

A grinding system for eliminating crack sources of an inner tapered bore of a motor rotating shaft and a grinding method therefor; the grinding system comprises a movable device (1), a pneumatic gun (2), and a clamping device; the movable device (1) is configured to be detachably and fixedly mounted on an end cover of a driving end of a motor to be repaired, and has a movable part capable of moving axially relative to the inner tapered bore of said motor; the pneumatic gun (2) is clamped in the clamping device, and a grinding head (4) is mounted on the head portion of the pneumatic gun (2); the clamping device is rotatably connected to the movable part so as to move axially and synchronously with the movable part, and can rotate relative to the movable part so as to drive the feed of the grinding head (4); said grinding method comprises the steps: S1, positioning a pneumatic gun; S2, grinding crack sources; and S3, polishing grinded grooves. Using this grinding system and method requires low costs, does not require an additional working site, and can repair a motor at any time and on site, realizing the grinding operation of fatigue sources of a motor in a whole machine state, saving the process time, and reducing the repair cycle of a motor.

Description

Grinding system and method for eliminating source of tapered hole crack in motor shaft

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on September 11, 2018, with application number 201811056734.6, and the invention name is "a repair system and method for eliminating a source of tapered hole cracks in a motor shaft" , The entire contents of which are incorporated herein by reference.

Technical field

The invention relates to the technical field of motor maintenance, and more particularly, to a grinding system for eliminating a source of taper hole cracks in a motor shaft, and also relates to a grinding method for eliminating sources of taper hole cracks in a motor shaft.

Background technique

The traction motor of the high-power locomotive transmits traction force through the pinion gear. The motor shaft has an inner cone hole 01, which cooperates with the pinion with an outer cone to transmit traction torque when the rotor rotates. In order to press-fit and disassemble the pinion, high pressure glycerin must be injected into the outer cone surface of the pinion to increase the inner cone hole 01 of the rotating shaft. Therefore, an oil injection hole and a ring oil groove are designed on the outer cone surface of the pinion. During the force transmission process, the two sides of the ring oil groove on the outer conical surface of the pinion gear will creep with the inner cone hole 01 of the shaft. After a long time, the source of fatigue in the inner cone hole 01 of the shaft will appear at the corresponding position of the pinion oil groove ( Two indentations), after the expansion of the fatigue source, it will lead to vicious quality accidents such as broken motor shafts and slow pinions, which will seriously affect the safe and stable operation of the locomotive motor.

In order to prevent the potential danger of safe operation caused by the expansion and deterioration of the fatigue source of the motor shaft, the fatigue source must be eliminated. The solution is to grind a ring groove at the corresponding position of the inner cone hole 01 of the rotating shaft, so that the inner cone hole 01 of the rotating shaft avoids both sides of the ring oil groove on the outer cone surface of the pinion, so that it does not directly contact.

The existing process for eliminating the source of shaft fatigue is to grind the source of fatigue with an ordinary deep hole internal grinder, that is, a ring groove 02 is ground at the inner cone hole 01 of the shaft corresponding to the pinion oil groove, as shown in Figures 1 and 2. FIG. 1 is a schematic diagram of grinding and installation of a rotor shaft on a deep-hole internal grinder; and FIG. 2 is a schematic diagram of a structure of a concave recessed groove formed on a deep-hole internal grinder. During grinding, first, disassemble the rotor in Figure 1 from the motor, clamp the left end of the rotor in the three-jaw chuck of the grinder, and support the right end with a center bracket. After the center is aligned, start the machine to rotate the rotor. In the case of high-speed rotation, the grinding wheel with a diameter of about D80 is controlled to reach the source of fatigue by controlling the axial movement distance, and then it is ground by longitudinal feed. The grinding depth is repaired according to the boss of the shaped grinding wheel. The grinding height is 0.3mm or 0.5mm, etc. After the grinding, the annular groove 02 should maintain a smooth transition with the inner cone 01 of the rotating shaft, and its surface roughness must be about Ra1.6.

However, using an ordinary deep-hole internal grinder to repair the fatigue source, although the reliability is good, there are also the following disadvantages:

1) If the grinding machine is used as a grinding device, a special deep-hole internal grinding machine must be used. The cost investment is large and the procurement cycle is long. To achieve maintenance in different places, multiple equipment must be invested.

2) The grinder is bulky and bulky, it will occupy a large work place, and it is not easy to move or carry.

3) During the maintenance of the motor, the rotor of the motor must be removed, so that the processes of disassembly of the motor, assembly of the motor, and retesting are virtually added.

4) The disassembled rotor needs to be delivered to a dedicated grinder area for grinding, causing waste of process conversion and grinding waiting.

5) Poor ability to resist risks. Fatigue source grinding relies on a single machine tool. If a machine tool fails, it affects the grinding source's grinding progress and cycle. The machine tool's grinding fatigue source has a poor ability to withstand sudden conditions.

6) The existing grinding method requires pre-processing and shaping of the grinding wheel, which increases the processing cost, and a shaped grinding wheel only needs to be re-processed after grinding only one rotating shaft.

7) The grinding wheel for machining has only a fixed boss height, such as 0.3mm, 0.5mm. The grinding depth must be strictly controlled during internal hole grinding to ensure a smooth transition after grinding, which increases the difficulty of controlling the size of the machining.

In summary, how to effectively solve the problems such as long motor maintenance intervals is a problem that needs to be solved by those skilled in the art.

Summary of the Invention

In view of this, the first object of the present invention is to provide a repair system for eliminating the source of taper hole cracks in the motor shaft. The structure design of the repair system can effectively solve the problems of long motor maintenance cycle and high cost. The second object of the present invention is to provide a repair method for eliminating the source of the taper hole crack in the motor shaft.

In order to achieve the first object, the present invention provides the following technical solutions:

A repairing system for eliminating a source of cracks in a taper hole in a motor shaft, comprising a moving device, a pneumatic gun, and a clamping device; the moving device is detachably and fixedly installed on a transmission end cover of a motor to be repaired, and A movable part capable of moving axially relative to an inner cone hole of the motor to be repaired; the pneumatic gun is clamped in the clamping device, and a grinding head is mounted on the head of the pneumatic gun; the clamp A holding device is rotatably connected to the movable portion to synchronously move axially with the movable portion, and can be rotated relative to the movable portion to drive the grinding head to feed.

Preferably, in the above-mentioned dressing system, the moving device includes a slide rail for fixed connection with the transmission end cover, and the movable part is a slider matching the slide rail, and the slider is opened on the slider. There are threaded holes, and slider fastening screws for locking the slider to different positions of the slide rail are provided in cooperation with the threaded holes.

Preferably, in the above-mentioned dressing system, one of the clamping device and the movable part has a cylindrical body, and the other is provided with a circular hole matching the cylindrical body, and the cylindrical body is inserted into the cylindrical body. A circular hole to enable the clamping device to rotate along the axis of the cylinder.

Preferably, the above-mentioned dressing system further includes a hinge device connected to the clamping device, a limited position hole is opened in the movable part, and the hinge device includes a first link, a second link, and a third link The first end of the first link is fixedly connected to the clamping device, the rear end is hinged to the first end of the second link, and the second end of the second link is connected to the third link The first end of the third link is hinged, the rear end of the third link passes through the limit hole, and the third link is driven by the transmission of the hinge device when the third link moves back and forth along the limit hole. The clamping device rotates relative to the movable part.

Preferably, in the above grinding system, the third connecting rod includes a rod body and a connecting rod bolt, the limiting hole is a threaded hole, the connecting rod bolt cooperates with the threaded hole, and a head of the connecting rod bolt The part is rotationally connected with the rod body, and can drive the rod body to move forward and backward.

Preferably, in the above grinding system, the clamping device includes an upper Harvard block and a lower Harvard block which are oppositely disposed, and a cavity formed by the upper Harvard block and the lower Harvard block to clamp the pneumatic gun.

Preferably, in the above-mentioned dressing system, two ends of the upper Harvard block and the lower Harvard block are detachably fixedly connected by screws of the Harvard block, respectively.

Preferably, the above-mentioned dressing system further includes a driving component for detachably fixedly mounting on a non-drive end cover of the motor to be repaired, and the driving component is connected to a rotor of the motor to be repaired through a transmission device. Connected to drive the rotor to rotate.

Preferably, the above-mentioned dressing system further includes a frame-type support frame, the support frame is used for detachably fixed connection with the non-transmission end cover, and the driving component is installed on the upper half of the support frame. unit.

Preferably, in the above grinding system, the grinding head is a diamond spherical grinding head or a cubic boron nitride spherical grinding head, and the diameter of the grinding head ranges from 6 to 12 mm.

The repairing system for eliminating the source of the taper hole crack in the rotating shaft of the motor provided by the invention comprises a moving device, a pneumatic gun and a hinge device of a clamping device. The moving device is used for being detachably and fixedly installed on the transmission end cover of the motor to be repaired. The moving device has a movable part and can move axially relative to the inner cone hole of the motor to be repaired. The clamping device is used to clamp the wind. The head of the pneumatic gun is equipped with a grinding head; the clamping device is rotationally connected with the movable part, and the clamping device can move axially relative to the inner cone hole of the motor to be repaired synchronously with the movable part, and can rotate relative to the movable part to Drive the grinding head to feed.

When the repairing system provided by the present invention is applied to the motor for maintenance, the moving device is first fixedly installed on the drive end cover of the motor to be repaired, and the clamping device clamps the pneumatic gun. Then, the air moving gun is aligned with the knife, and the movable part of the adjusting device is moved axially relative to the inner tapered hole of the motor to be repaired. The grinding head of the air moving gun is opposite to the crack source of the inner tapered hole of the motor to be repaired. Hold the device until the grinding head is in contact with the crack source. Then, the crack source grinding is performed. The rotor of the motor to be repaired rotates, the air source of the pneumatic gun is turned on, and the clamping device is rotated relative to the movable part, so that the grinding head is stepped to grind the crack source, and one crack source is finished. After that, the grinding head is retracted, the air source is turned off, and the air-jet gun is returned to the knife setting step, and the next crack source is subjected to the air-jet gun. Finally, the grinding groove is polished. The grinding system can be used to replace the machine tool. After grinding, the function requirements of the machine can be met. The grinding system has a simple structure, low cost, short production cycle, small size, light weight, and does not require additional work space. Its light weight is also convenient for relocation or carrying according to motor maintenance needs. The above-mentioned grinding process does not need to remove the rotor, that is, it realizes the grinding operation of the fatigue source of the motor in the state of the whole machine, which saves the time of the process of disassembly, rotor handling, motor assembly, and motor testing, and reduces motor repair. cycle.

In order to achieve the above-mentioned second object, the present invention also provides a repair method for eliminating the source of the taper hole crack in the motor shaft, using any of the above-mentioned repair systems, including steps:

S1: Pneumatic gun alignment, the movable part of the moving device is axially moved relative to the inner tapered hole of the motor to be repaired until the grinding head of the pneumatic gun is opposed to the crack source of the inner tapered hole of the motor to be repaired , Rotating the clamping device relative to the movable portion until the grinding head is in contact with the crack source;

S2: crack source grinding, the rotor of the motor to be repaired rotates, the air source of the wind-driven gun is turned on, and the clamping device is rotated relative to the movable part, so that the grinding head steps to repair the crack source Grinding, after the grinding of one of the crack sources is completed, the grinding head is retracted, the wind source is turned off, and the process returns to step S1, and the next crack source is subjected to a pneumatic gun-knife;

S3: Grinding groove for grinding and polishing. Replace the grinding head with a felt-type soft polishing spherical wheel with a larger diameter than the grinding head. Repeat the steps S1 and S2 to form a ring-shaped grinding groove for grinding. The sharp edges of the ring-shaped dressing groove are ground and polished.

Preferably, in the above-mentioned dressing method, the dressing groove polishing in step S3 specifically includes:

The grinding groove is polished so that the sharp edges are rounded with a radius ranging from 2 to 4 mm.

Preferably, in the above-mentioned dressing method, the sandpaper is a fine sandpaper larger than 100 mesh.

Preferably, in the above-mentioned dressing method, in the step S2, the dressing the crack source specifically includes:

The crack source is ground, and the ground depth ranges from 0.3 to 0.5 mm.

Preferably, in the above-mentioned grinding method, in step S1, the movable part of the adjusting mobile device is moved axially to the grinding head of the pneumatic gun and the to-be-maintained relative to the inner cone hole of the motor to be maintained. The source of the crack in the inner cone hole of the motor is opposite, and specifically includes:

The movable part of the moving device is adjusted to move axially relative to the inner tapered hole of the motor to be repaired until the grinding head of the pneumatic gun is opposed to the crack source of the inner tapered hole of the motor to be repaired, and the movable part is locked. tight;

In step S2, the step of turning off the wind source and returning to step S1 further includes:

Release the movable part.

By applying the dressing method provided by the present invention, any one of the above dressing systems is used to grind the source of the taper hole crack in the motor shaft. After the dressing, the function requirements of the machine dressing can be met, and it is convenient to carry out according to the needs of the motor maintenance service. The rotor does not need to be removed during the grinding process, that is, the grinding operation of the fatigue source is realized under the condition of the whole machine, which saves the time of the process of disassembly, rotor handling, motor assembly, and motor testing, and reduces the motor repair cycle. .

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a schematic diagram of grinding and installation of a rotor shaft on a deep-hole internal grinder;

FIG. 2 is a schematic structural diagram of a concave concave groove formed on a deep-hole internal grinder;

3 is a schematic diagram of a grinding system for eliminating a source of a tapered hole crack in a motor shaft according to a specific embodiment of the present invention;

Figure 4 is a schematic structural diagram of a dressing system;

5 is a schematic structural view of a front view of a moving device, a clamping device, and a hinge device;

FIG. 6 is a schematic side view structure diagram of FIG. 5; FIG.

7 is a schematic plan view of the structure of FIG. 5;

8 is a three-dimensional structure diagram of a moving device, a clamping device and a hinge device;

9 is a schematic structural diagram of a support frame;

10 is a schematic cross-sectional structure view taken along A-A in FIG. 9;

FIG. 11 is a schematic structural diagram of a ring-shaped dressing groove formed after dressing according to the present invention.

The marks in the drawings are as follows:

Inner cone hole 01, annular groove 02;

1, mobile device, 2, pneumatic gun, 3, hinge device, 4, grinding head, 5, driving gear, 6, driving motor, 7, driven gear, 8, stator, 9, rotor, 10, inner cone rotating shaft ;

11. Reducer (driving motor and gearbox), 12. Bolt of reducer support frame, 13, Fixing bolt of reducer, 14, Bolt of driving gear, 15, Flat key of fixing of driving gear, 16, Support frame;

21, lower Harvard block, 22, upper Harvard block, 23, connecting rod, 231, first connecting rod, 232, second connecting rod, 233, third connecting rod, 24, baffle, 25, pin, 26, Support seat, 27, slider, 28, Harvard block screw, 29, clamping device coupling nut, 30, baffle screw, 31, connecting rod bolt, 32, slider fastening screw, 33, washer, 34, support seat Fastening screws, 35, slide rails, 36, limit holes;

41. Ring-shaped dressing groove.

detailed description

The embodiment of the invention discloses a repairing system for eliminating a source of a taper hole crack in a motor shaft to reduce a motor maintenance period.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIGS. 3 to 11. FIG. 3 is a schematic diagram of a grinding system for eliminating a source of a tapered hole crack in a motor shaft according to a specific embodiment of the present invention. FIG. 4 is a schematic diagram of a grinding system. FIG. 5 is a mobile device 1 Schematic diagram of the front view of the clamping device and the hinge device 3; FIG. 6 is a schematic view of the side structure of FIG. 5; FIG. 7 is a schematic view of the top structure of FIG. 5; and FIG. 8 is the three-dimensional structure of the moving device, the clamping device and the hinge device 9 is a schematic structural view of the support frame 16; FIG. 10 is a cross-sectional structural schematic view of AA in FIG. 9; and FIG. 11 is a structural schematic view of the annular dressing groove 41 formed after the dressing according to the present invention.

In a specific embodiment, the repairing system for eliminating the source of the taper hole crack in the motor shaft provided by the present invention includes a moving device 1, a pneumatic gun 2, and a clamping device.

The mobile device 1 is used for being detachably and fixedly mounted on the transmission end cover of the motor to be repaired. The mobile device 1 has a movable part and can move axially relative to the inner cone hole of the motor to be repaired. That is, on the one hand, a supporting force is provided through the connection of the moving device 1 and the transmission end cover to support the pneumatic gun 2. On the other hand, the movable part of the moving device 1 can reciprocate in the axial direction of the inner cone hole, thereby driving the pneumatic gun 2 forward or backward in the axial direction to align the fatigue source of the inner cone hole, that is, an indentation. . Inner cone bore fatigue source refers to the crack source or suspected crack source formed by the indentation caused by the peristaltic friction during the long-term operation of the transmission pinion of the traction motor and the inner cone bore of the inner cone rotating shaft 10. The moving device 1 may specifically adopt a slide rail structure, a track roller structure, or a telescopic cylinder structure. The moving device 1 and the transmission end cover are preferably connected by bolts, and may also be connected by other conventional detachable fixed connection methods in the prior art according to requirements.

The clamping device is used for clamping the pneumatic gun 2, and the pneumatic gun 2 is fixed in the clamping device during grinding and moves synchronously with the clamping device. The clamping device may specifically adopt a conventional clamp in the prior art, which is not specifically limited herein.

A grinding head 4 is mounted on the head of the air moving gun 2. The pneumatic gun 2 uses the power output torque of compressed air to drive the grinding head 4 mounted on the head to rotate, and repairs the crack source of the inner tapered hole through the rotation of the grinding head 4. When the compressed air is turned on during operation, the grinding head 4 is driven to rotate at a high speed. When the grinding head 4 contacts the surface of the inner tapered hole, the grinding process is started, and an annular groove of a desired depth is formed at the indentation of the fatigue source. The size of the grinding head 4 is generally small, and its width is generally not less than the width of an indentation. For the specific structure and working principle of the pneumatic gun 2, please refer to the prior art, and will not be repeated here. The wind-action gun 2 can be a wind-action gun 2 with a rotating air-flow regulating valve at the rear end to facilitate air volume adjustment. According to the needs, a common type of hand-operated air flow regulating valve of the pneumatic gun 2 can also be used, then an adjustable bolt is designed in the clamping device, and the compressed air is opened and closed or the flow of the compressed air is adjusted by tightening or loosening the bolt In order to control the start and stop of the pneumatic gun 2 and the speed of the rotation speed.

The clamping device is rotationally connected with the movable part, and the clamping device can move axially relative to the inner cone hole of the motor to be repaired synchronously with the movable part, and can rotate relative to the movable part to drive the grinding head 4 to feed. Specifically, the rotation axis is perpendicular to the axial direction of the inner tapered hole, that is, parallel to the end face of the inner tapered hole. When the clamping device rotates around the rotating shaft relative to the moving part, the pneumatic gun 2 in the clamping device is relatively moving. Rotating, that is, adjusting the deflection of the pneumatic gun 2 to achieve the feed or retraction of the grinding head 4. And through the action of the rotating shaft, the clamping device is driven to synchronously move in the circumferential direction along with the movable part.

When the repairing system provided by the present invention is applied to the motor for maintenance, first, the mobile device 1 is fixedly mounted on the transmission end cover of the motor to be repaired, and the clamping device clamps the pneumatic gun 2. Then, the air-driven gun 2 sets the knife and adjusts the movable part of the moving device 1 to move axially to the inner tapered hole of the motor to be repaired. The grinding head 4 of the air-driven gun 2 faces the crack source of the inner tapered hole of the motor to be repaired. The movable part rotates the clamping device until the grinding head 4 comes into contact with the crack source. Then, the crack source is repaired. The rotor 9 of the motor to be repaired rotates, the air source of the wind gun 2 is turned on, and the clamping device is rotated relative to the movable part, so that the grinding head 4 steps to repair the crack source. One crack source After the grinding is completed, the grinding head 4 is retracted, the air source is turned off, and the air-jet gun is returned to the two-tool setting step, and the next crack source is subjected to the air-jet gun 2-pair tool. Finally, the polished grooves are ground and polished.

This grinding system is used to replace the machine tool. After grinding, the functional requirements of machine grinding can be achieved. The structure of the grinding system is simple, and its light weight is also convenient for relocation or carrying according to the maintenance needs of the motor. The above-mentioned grinding process does not need to remove the rotor 9, that is, it realizes the grinding operation of the fatigue source in the state of the whole machine, which saves the time of the process of disassembly of the motor, the transportation of the rotor 9, the assembly of the motor, and the test of the motor. Motor repair cycle.

Specifically, the moving device 1 includes a slide rail 35 for fixed connection with the transmission end cover, and the movable part is a slider 27 that cooperates with the slide rail 35. That is, the moving device 1 includes a fixed portion and a movable portion. The fixed portion is used to be fixedly connected to the transmission end cover and extends in the axial direction of the inner cone hole. The movable portion can move relative to the fixed portion. When the slide rail slider structure is adopted, the fixed portion is the slide rail 35 and the movable portion is the slider 27. The preferred slider 27 is an I-shaped slider, and the two opposite slide rails 35 are respectively inserted into the I-shaped grooves to play a supporting and limiting role. In order to facilitate the installation of the slide rail 35, a support base 26 is further included. The support base 26 is used for fixed connection with the transmission end cover. The slide rail 35 is fixed on the support base 26, and is indirectly connected with the transmission end cover. The slide rail 35 and the support base 26 may specifically adopt an integrated structure, or may be connected by a conventional fixed connection method in the prior art. Specifically, the support base 26 can be detachably fixed to the transmission end cover by the support base fastening screws 34, and can also be connected by other conventional detachable fixed connection methods as required.

In order to facilitate the relative static motion of the pneumatic gun 2 in the axial direction when grinding an indentation, a threaded hole is opened in the slider 27, and the screw hole is provided with the screw hole for locking the slider 27 to different positions of the slide rail 35.的 滑杆 滑 螺 33。 The slider fastening screw 33. When moving the slider 27 in the axial direction, loosen the slider fastening screw 33 and push the slider 27 to move relative to the slide rail 35 to perform two pairs of blades on the pneumatic gun. After the pneumatic gun 2 is moved in place, it is aligned with a pressure. In the case of scratches, the slider fastening screw 33 can be tightened, thereby locking the slider 27 to the corresponding position of the slide rail 35, the axial position of the pneumatic gun 2 is locked, and then the grinding head of the pneumatic gun 2 is controlled during grinding 4 feed is enough, no need for controller axial displacement, easy for user operation.

Further, one of the clamping device and the movable part has a cylinder, and the other is provided with a circular hole matching the cylinder, and the cylinder is inserted into the circular hole so that the clamping device can rotate along the axis of the cylinder. . That is, the rotary connection between the clamping device and the movable part is realized by a cylinder. Specifically, a circular hole can be opened in the movable part. The clamping device has a cylindrical body, and then the cylinder is inserted into the circular hole. The supporting effect, on the other hand, enables the clamping device to rotate around the cylinder relative to the movable part. According to requirements, a threaded post may also be provided on the clamping device, and a through hole is provided on the movable portion. The threaded column passes through the through hole and cooperates with the coupling nut 29 of the clamping device, so as to realize the rotational connection between the clamping and the movable portion. Moreover, the coupling nut 29 of the clamping device can prevent the threaded post from passing through the through hole. In order to prevent abrasion of the connecting nut of the clamping device and the movable part, a washer 33 may be provided between the two.

In order to easily control the rotation of the clamping device and thus control the feed or retraction of the grinding head, it also includes a hinge device 3 connected to the clamping device. The hinge device 3 includes three links 23 connected in order. The three links 23 are specifically The first link 231, the second link 232, and the third link 233. The first end of the first link 231 is fixedly connected to the clamping device, the tail end is hinged to the first end of the second link 232, and the second link The tail end of the rod 232 is hinged to the head end of the third link 233, and the tail end of the third link 233 passes through the limiting hole 36. Specifically, two adjacent links 23 may be hinged through a pin 25.

The first link 231 is fixedly connected to the clamping device. A limiting hole 36 is provided on the movable part. The third link 233 passes through the limiting hole 36. The third link 233 is connected through the joints when moving back and forth along the limiting hole 36. The transmission of the rod 23 drives the clamping device to rotate relative to the movable part. That is, through the linkage of the multiple links 23, the third link 233 moves back and forth along the limit hole 36 into the rotation of the first link 231, which in turn drives the rotation of the clamping device fixedly connected to the movable portion. In order to control the feed or retraction of the grinding head 4, it is only necessary to push the third link 233 forward or backward along the limit hole 36, which is simpler and simpler than directly controlling the rotation operation of the clamping device, and can The movement amount of feed or retract is enlarged through the structure of the multi-section link 23, thereby facilitating the control of the operator and improving the grinding accuracy. As needed, the third link 233 can also be automatically moved by a structure such as a telescopic cylinder. It should be noted that the directions of the two opposite sides of the limiting hole 36 in the front and rear directions here do not limit the absolute position during the grinding process.

Further, the third connecting rod 233 includes a rod body and a connecting rod bolt 31, the limiting hole 36 is a threaded hole, the connecting rod bolt 31 cooperates with the threaded hole, the head of the connecting rod bolt 31 is rotatably connected to the rod body, and can drive the rod body forward and backward mobile. It should be noted that the front-rear direction is the opposite sides of the limiting hole 36. That is, when the connecting rod bolt 31 is screwed in or out in the threaded hole, the rotation of the connecting rod bolt 31 does not affect the rod body, that is, the connecting rod bolt 31 rotates relative to the rod body, and the rotation of the connecting rod bolt 31 generates forward and backward displacement and drives the rod body. Move in sync. Furthermore, when pushing the end rod body, only the connecting rod bolt 31 needs to be rotated. Specifically, the rotation number of the connecting rod bolt 31 can be controlled to precisely control the rotation angle of the clamping device, thereby controlling the feed amount or retreat of the grinding head 4. Sword amount.

Specifically, the end of the rod body has a mounting hole, and the cross-section of the mounting hole is T-shaped. The head of the connecting rod bolt 31 is blocked in the mounting hole, and the rod body does not rotate when the connecting rod bolt 31 rotates. The forward and backward displacement will move the rod synchronously through the top or back of the bolt head. Of course, the connection manner between the rod body and the link bolt 31 is not limited to the above-mentioned manner.

In order to facilitate the installation of the hinge device 3, a baffle 24 may be provided. The baffle 24 is fixed on the movable part by a baffle screw 30, and may be specifically fixed on the slider 27.

The clamping device specifically includes an upper Harvard block 22 and a lower Harvard block 21 which are oppositely disposed, and a cavity formed by the upper Harvard block 22 and the lower Harvard block 21 to clamp the wind-driven gun 2. Preferably, both sides of the upper Harvard block 22 and the lower Harvard block 21 are detachably fixedly connected by Harvard block screws 28 respectively, and then the air-action gun 2 can be installed or removed by loosening the screws. The rotation connection between the clamping device and the movable part can be specifically connected with the movable part through the lower Harvard block 21, and the specific connection method, please refer to the above embodiment, which will not be repeated here.

On the basis of the above-mentioned implementations, it further includes a driving component for detachably fixedly mounted on the non-transmission end cover of the motor to be repaired, and the driving component is connected to the rotor 9 of the motor to be repaired through the transmission device to drive the rotor 9 Turn. That is, the driving component is used as a power source to rotate the rotor 9 so that the grinding head 4 can perform grinding. Furthermore, in the case where there is no external power and the motor to be repaired is energized to rotate the rotor 9, a moderately-powered driving component is mounted on the motor body to enable the rotor 9 to rotate at a uniform speed. Of course, in a case where the motor rotor 9 to be repaired can be turned on by electricity, the driving component may not be provided.

Specifically, the driving component adopts a driving motor 6, and a driving motor with a reduction gear box can be used as required. The transmission device can be a gear pair. The driving motor 6 decelerates and provides a rotary motion to the rotor 9 through the gear pair meshing transmission, that is, the driving motor 6 is connected to the driving gear 5, the rotor 9 is connected to the driven gear 7, and the driving gear. 5. The driven gears 7 mesh with each other. In the structure of the gear pair, the rotation speed of the drive motor 6 is transmitted through a certain reduction ratio. After the drive motor 6 passes the gear transmission pair, the rotation speed provided to the rotor 9 is preferably between 40 rpm and 80 rpm. The driven gear 7 is fixed through a plurality of bolt holes on the end face of the non-drive end of the rotating shaft, and the dimensional processing accuracy of the mating surface of the driven gear 7 and the rotating shaft is controlled to ensure coaxiality with the rotation center of the rotating shaft. As the driving motor 6, a driving motor 6 with a power between 150W and 220W can be selected, and a driving motor 6 with a power of 180W is preferably used.

Further, a frame-type support frame 16 is further included. The support frame 16 is used for detachable and fixed connection with the non-transmission end cover, and the driving component is installed on the upper half of the support frame 16. That is, the power source and the reduction transmission mechanism are fixed on the non-transmission end cover of the motor to be repaired through a support frame 16, and the fixing method can be fixed through the bolt mounting hole of the existing bearing cover on the motor to be repaired. In order to reduce the weight and facilitate the handling and installation by hand, the design of the support frame 16 for installing the driving motor 6 adopts the structural form of the brace, that is, the excess material is hollowed out, leaving some structural forms of the skeleton. The position where the driving motor 6 is mounted on the support frame 16 is located on the upper half of the support frame 16 so that the center of gravity is off-centered, thereby facilitating lifting during transportation.

When installing, first install the driven gear 7 and install and fix the driven gear 7 on the end face of the non-drive end of the shaft with multiple bolts. The driving motor 6 and the driving gear 5 are then installed, and the driving motor 6 and the driving gear 5 are mounted on the support frame 16 by a plurality of bolts. Finally, the support frame 16 is fixed on the non-transmission end cover of the motor to be repaired by a plurality of bolts, and meshes with the driven gear 7.

In each of the above embodiments, the grinding head 4 is a diamond spherical grinding head 4 or a cubic boron nitride spherical grinding head 4, and the diameter of the grinding head 4 ranges from 6 to 12 mm. Preferably, a spherical grinding head 4 made of cemented carbide or cubic boron nitride is used with a diameter of 8 mm. The grinding groove of the grinding system after the tapered bore of the rotor 9 shaft of the motor to be repaired is a circular arc formed by the diameter of the grinding head 4 naturally, and the diameter of the arc is the same as the diameter of the grinding head 4. The depth of the grinding groove after the grinding of the 9-axis inner tapered hole of the rotor of the motor to be repaired is arbitrarily controllable, and the preferred control depth is 0.3 mm to 0.5 mm. The grinding groove after the grinding can be subjected to subsequent grinding and polishing treatments to make a smooth transition with the inner tapered hole wall and form an R transition arc, preferably R2 to R4. Because there are generally two indentations, there are two corresponding repair grooves.

In summary, the grinding system provided in this application installs a moving device 1, a clamping device, and a pneumatic gun 2 on the transmission end cover of the motor to be repaired, so that the grinding head 4 can move forward and backward and the grinding feed movement. Optionally, a power source and a speed reduction transmission mechanism are installed on the non-transmission end cover of the motor to be repaired, so that the rotor 9 performs a rotational movement. The pneumatic gun 2 is equipped with a wear-resistant grinding head 4, which can step smoothly, and can eliminate the two indentations of the fatigue source of the tapered hole in the rotating shaft and make a smooth transition. The pneumatic gun 2 can slide back and forth manually, and can reach the indentation position to be repaired at will.

This grinding system replaces machine tools, such as deep-hole internal grinders, with low cost and short production cycle, and can quickly perform grinding of the shaft fatigue source at any time and place. The grinding system is small and light, and does not require additional work space. The grinding system can realize the grinding operation of the fatigue source of the motor in the state of the whole machine, reduce the repair period of the motor, and save the time of the process of folding, installing, transferring and retesting the motor. Except that the pneumatic gun 2 is a fragile part, all other parts are mechanical components or a general-purpose driving motor 6, and only one additional pneumatic gun 2 is required, so there is no risk of shutdown. The dressing system can use the wear-resistant small grinding head 4 with a diameter of D8. It does not need to be shaped and can be used directly. It has high durability. One cubic boron nitride or diamond small grinding head 4 can grind 100 pieces The shaft, so the cost is very low. When the grinding system uses a small grinding head 4 with a diameter of D8 for grinding, the grinding depth can be freely controlled in the range of 0.3 mm to 0.5 mm, which reduces the difficulty of grinding control.

The invention also discloses a repairing method for eliminating the source of the taper hole crack in the rotating shaft of the motor, adopting any of the above-mentioned dressing systems, and installing the dressing system on the motor, including the following steps:

S1: 2 pairs of blades of the pneumatic gun, adjust the movable part of the mobile device 1 to move axially to the inner cone hole of the motor to be repaired. The grinding head 4 of the pneumatic gun 2 is opposite to the crack source of the inner cone hole of the motor to be repaired. The movable part rotates the clamping device until the grinding head 4 comes into contact with the crack source.

It should be noted that the crack source of the inner tapered hole is the indentation. Specifically, the grinding device 4 of the pneumatic gun 2 can be brought into contact with the indentation by adjusting the hinge device 3.

S2: Crack source grinding, the rotor 9 of the motor to be repaired rotates, the air source of the wind gun 2 is turned, and the clamping device is rotated relative to the movable part, so that the grinding head 4 steps to grind the crack source, and one crack source is grinded After completion, the grinding head 4 is retracted, the air source is turned off, and the process returns to step S1, and the next crack source is subjected to the air-operated gun 2 pair of cutters.

Specifically, the driving motor 6 can be started, and the rotor 9 can be rotated. Turn on the wind source of the pneumatic gun 2, adjust the hinge device 3 to step the grinding head 4, and make the grinding head 4 grind the fatigue source until the first pressure. After finishing the mark grinding, the grinding head 4 is retracted, the air source is turned off, the slider 27 is moved to the knife, the axial feed is performed, and the second indentation is continued to be ground.

Preferably, the grinding depth is between 0.3 mm and 0.5 mm, that is, the grinding source 4 steps to grind the crack source. After the grinding of one crack source is completed, the grinding depth is between 0.3 mm and 0.5 mm. The grinding head 4 retracts the knife, closes the wind source, and returns to step S1.

S3: Grinding groove for grinding and polishing. Replace the grinding head with a felt-like soft polishing spherical wheel with a larger diameter than the grinding head. Repeat the steps S1 and S2 to form the ring-shaped dressing groove; or use sandpaper to repair the formed ring-shaped dressing. The sharp edges of the grooves are ground and polished.

Specifically, after the grinding, disconnect the power source and the air source, and remove the actuator at the transmission end, that is, the moving device 1, the pneumatic gun 2, and the clamping device, and the hinge device 3 is also included as required. Restart the driving motor 6 and use sandpaper to polish and polish the sharp edges of the ring-shaped dressing groove 41 formed in the tapered hole in the rotating shaft. Or, replace the grinding head with a felt-type soft polishing spherical wheel with a larger diameter than the grinding head and repeat the steps S1 and S2 for grinding, that is, install a felt-type soft polishing ball with a diameter larger than the grinding head on a pneumatic gun. It is preferred to use felt-like soft polishing balls with a diameter ranging from 15mm to 20mm, and repeat steps S1 and S2, that is, step S1: first set the pneumatic gun 2 to the knife, and adjust the movable part of the mobile device 1 to the inner cone hole of the motor to be repaired It moves axially until the soft polishing ball of felt is opposite to the annular dressing groove 41, and the clamping device is rotated relative to the movable part until the soft polishing ball of felt is in contact with the annular dressing groove 41. Step S2: The rotor 9 of the motor to be repaired is rotated, the air source of the air-driven gun 2 is turned on, and the clamping device is rotated relative to the movable part, so that the soft polishing ball of felt type steps to polish and polish the ring-shaped dressing groove 41, one ring After the grinding and polishing of the dressing groove 41 is completed, the soft polishing ball of felt is retracted, the air source is turned off, and the process returns to step S1 to perform two air-operated guns on the next ring-shaped dressing groove 41.

Preferably, the grinding and polishing of the grinding groove in step S3 specifically includes: grinding and polishing of the grinding groove so that the sharp edge transitions at a rounded corner with a radius ranging from 2 to 4 mm, that is, between R2 and R4. The effect achieved by the grinding and polishing of the concave annular grinding groove 41 is shown in FIG. 11. Specifically, the sandpaper is a fine sandpaper having a value greater than 100 mesh.

Specifically, in step S1, adjusting the movable part of the mobile device 1 axially to the grinding head 4 of the pneumatic gun 2 relative to the inner cone hole of the motor to be repaired is opposite to the crack source of the inner cone hole of the motor to be repaired, and specifically includes:

The movable part of the adjusting and moving device 1 is axially moved relative to the inner tapered hole of the motor to be repaired until the grinding head 4 of the pneumatic gun 2 faces the crack source of the inner tapered hole of the motor to be repaired, and the movable part is locked. Specifically, the slider 27 of the mobile device 1 can be fastened.

In step S2, turning off the wind source and returning to step S1 further includes:

Release the movable part.

By applying the dressing method provided by the present invention, any one of the above dressing systems is used to grind the source of the taper hole crack in the motor shaft. After the dressing, the function requirements of the machine dressing can be met, and it is convenient to carry out according to the maintenance needs of the motor anytime, anywhere. service. It is not necessary to remove the rotor 9 during the grinding process, that is, to realize the grinding operation of the fatigue source of the motor in the state of the whole machine, which saves the time of the process of disassembly of the motor, the transportation of the rotor 9, the assembly of the motor, and the test of the motor, and reduces the motor Repair cycle.

The embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts between the embodiments, refer to each other.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (15)

1. A repairing system for eliminating a source of cracks in a taper hole in a motor shaft, comprising a moving device, a pneumatic gun, and a clamping device; the moving device is detachably and fixedly installed at a transmission end of a motor to be repaired The cover is provided with a movable part capable of moving axially relative to the inner tapered hole of the motor to be repaired; the pneumatic gun is clamped in the clamping device, and a grinding head is installed on the head of the pneumatic gun The clamping device is rotatably connected to the movable portion to synchronously move axially with the movable portion, and can be rotated relative to the movable portion to drive the grinding head to feed.
2. The dressing system according to claim 1, wherein the moving device comprises a slide rail for fixed connection with the transmission end cover, and the movable portion is a slider that cooperates with the slide rail, The slider is provided with a threaded hole, and slider fastening screws for locking the slider to different positions on the slide rail are provided in cooperation with the threaded hole.
3. The dressing system according to claim 1, wherein one of the clamping device and the movable part has a cylindrical body, and the other is provided with a circular hole matching with the cylindrical body, so that The cylinder is inserted into the circular hole so that the clamping device can rotate along the axis of the cylinder.
4. The dressing system according to claim 1, further comprising a hinge device connected to the clamping device, the movable part is provided with a limited position hole, and the hinge device includes a first link, a second A connecting rod and a third connecting rod, the first end of the first connecting rod is fixedly connected to the clamping device, the rear end is hinged to the first end of the second connecting rod, and the rear end of the second connecting rod is A head end of the third link is hinged, a tail end of the third link passes through the limit hole, and the third link passes through the hinges when moving back and forth along the limit hole. The driving of the device drives the clamping device to rotate relative to the movable part.
5. The dressing system according to claim 4, wherein the third connecting rod comprises a rod body and a connecting rod bolt, the limiting hole is a threaded hole, and the connecting rod bolt cooperates with the threaded hole, so that The head of the connecting rod bolt is rotatably connected to the rod body, and can drive the rod body to move forward and backward.
6. The dressing system according to claim 1, wherein the clamping device comprises an upper Harvard block and a lower Harvard block which are oppositely disposed, and a cavity formed by the upper Harvard block and the lower Harvard block is clamped to clamp The wind moves the gun.
7. The dressing system according to claim 6, characterized in that both sides of the upper Harvard block and the lower Harvard block are detachably fixedly connected by screws of the Harvard block.
8. The dressing system according to any one of claims 1 to 7, further comprising a driving member for detachably fixedly mounting on a non-drive end cover of the motor to be repaired, the driving member The transmission device is connected with the rotor of the motor to be repaired to drive the rotor to rotate.
9. The dressing system according to claim 8, further comprising a frame-type support frame, the support frame being used for detachably fixed connection with the non-transmission end cover, and the driving component is installed at the The upper half of the support frame.
10. The dressing system according to any one of claims 1 to 7, wherein the grinding head is a diamond spherical grinding head or a cubic boron nitride spherical grinding head, and the diameter of the grinding head ranges from 6 to 12 mm.
11. A repairing method for eliminating a source of taper hole cracks in a motor shaft, using the repairing system according to any one of claims 1 to 10, comprising the steps of:

    S1: Pneumatic gun alignment, the movable part of the moving device is axially moved relative to the inner tapered hole of the motor to be repaired until the grinding head of the pneumatic gun is opposed to the crack source of the inner tapered hole of the motor to be repaired , Rotating the clamping device relative to the movable portion until the grinding head is in contact with the crack source;

    S2: crack source grinding, the rotor of the motor to be repaired rotates, the air source of the wind-driven gun is turned on, and the clamping device is rotated relative to the movable part, so that the grinding head steps to repair the crack source Grinding, after the grinding of one of the crack sources is completed, the grinding head is retracted, the wind source is turned off, and the process returns to step S1, and the next crack source is subjected to a pneumatic gun-knife;

    S3: Grinding grooves for grinding and polishing. Replace the grinding head with a felt-like soft polishing spherical wheel with a larger diameter than the grinding head. Repeat steps S1 and S2 to grind the formed annular grinding groove; or use sandpaper to grind the formed sanding groove. The sharp edges of the ring-shaped dressing groove are ground and polished.
12. The dressing method according to claim 11, characterized in that the dressing groove grinding and polishing in step S3 specifically comprises:

    The grinding groove is polished so that the sharp edges are rounded with a radius ranging from 2 to 4 mm.
13. The dressing method according to claim 11, wherein the sandpaper is a fine sandpaper of more than 100 mesh.
14. The dressing method according to any one of claims 11 to 13, wherein in step S2, the dressing the crack source specifically includes:

    The crack source is ground, and the ground depth ranges from 0.3 to 0.5 mm.
15. The grinding method according to any one of claims 11 to 13, characterized in that, in step S1, the movable part of the adjusting moving device moves axially to the inner tapered hole of the motor to be repaired to The grinding head of the pneumatic gun is opposite to the crack source of the inner tapered hole of the motor to be repaired, and specifically includes:

    The movable part of the moving device is adjusted to move axially relative to the inner tapered hole of the motor to be repaired until the grinding head of the pneumatic gun is opposed to the crack source of the inner tapered hole of the motor to be repaired, and the movable part is locked. tight;

    In step S2, the step of turning off the wind source and returning to step S1 further includes:

    Release the movable part.

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