阅读说明：本技术 转子动平衡的校正装置 (Rotor dynamic balance correcting device ) 是由 唐矫燕 钱华 朱桂华 于 2020-06-16 设计创作，主要内容包括：一种转子动平衡的校正装置,其包括平行设置的导轨(1),在导轨的中部搁置有第一拖板(15),在导轨的两端分别搁置有第二拖板(16)和第三拖板(5),在第一拖板的两端分别设有顶住转子(10)的转轴(11)的顶针(14),在第三拖板上安装有皮带轮(2),皮带轮与转子铁芯之间连接有皮带(7),在导轨上安装有定位块(9),第一拖板朝向第三拖板的一侧能与定位块相贴；在第二拖板上安装有切削转子端环的车刀(21)。其特点是,转子旋转时,转子的不平衡质量产生的离心力会使第一拖板沿导轨往返运动,推进第二拖板使车刀与转子的接触切削,达到消除转子不平衡点目的。有益效果是,平衡校正精度高,工作效率高。(A correcting device for dynamic balance of a rotor comprises a guide rail (1) which is arranged in parallel, wherein a first carriage (15) is arranged in the middle of the guide rail, a second carriage (16) and a third carriage (5) are respectively arranged at two ends of the guide rail, ejector pins (14) which are used for ejecting a rotating shaft (11) of the rotor (10) are respectively arranged at two ends of the first carriage, a belt pulley (2) is arranged on the third carriage, a belt (7) is connected between the belt pulley and a rotor iron core, a positioning block (9) is arranged on the guide rail, and one side of the first carriage, which faces the third carriage, can be attached to the positioning block; a turning tool (21) for cutting the rotor end ring is mounted on the second carriage. When the rotor rotates, the centrifugal force generated by the unbalanced mass of the rotor can enable the first carriage plate to move back and forth along the guide rail, and the second carriage plate is pushed to enable the turning tool to be in contact cutting with the rotor, so that the purpose of eliminating the unbalanced point of the rotor is achieved. The balance correction method has the advantages of high balance correction precision and high working efficiency.)

1. A correcting device for rotor dynamic balance comprises a guide rail (1) which is arranged in parallel, wherein a first carriage (15) is arranged in the middle of the guide rail, a second carriage (16) is arranged at one end of the guide rail, and a third carriage (5) is fixedly arranged at the other end of the guide rail, and is characterized in that ejector pins (14) which are abutted against a rotating shaft (11) of a rotor (10) are respectively arranged at two ends of the first carriage, a belt pulley (2) is arranged on the third carriage (5), a belt (7) is connected between the belt pulley and a rotor iron core and is driven by a driving motor (3), a positioning block (9) is arranged on the guide rail, and one side of the first carriage, which faces the third carriage, can be attached to the positioning block; a tool rest (18) is fixedly connected to the second carriage, a turning tool (21) is mounted on the tool rest, the turning tool faces an end ring (22) of the rotor, a screw rod (19) is screwed into the second carriage, and the second carriage can move along the guide rail when the screw rod rotates.

2. The device for correcting the dynamic balance of the rotor as claimed in claim 1, wherein the movement of the second carriage is automatically controlled by a control device, the control device comprises a stepping motor (20) connected with the screw rod and a controller for controlling the stepping motor, the controller comprises a sensor, a single chip microcomputer and a driver, the output end of the sensor is connected with the input end of the single chip microcomputer, the output end of the single chip microcomputer is connected with the input end of the driver, and the output end of the driver is connected with the stepping motor;

the sensor converts the vibration of the first dragging plate into an electric signal, a program is arranged in the single chip microcomputer to judge the amplitude of the electric signal, when the amplitude of the electric signal is larger than or equal to a set value, the single chip microcomputer outputs a forward rotation instruction to the driver, and the driver drives the stepping motor to rotate forward, so that the second dragging plate advances to cut the rotor; when the amplitude of the electric signal is smaller than the set value, the single chip microcomputer outputs a reverse instruction to the driver, and the driver drives the stepping motor to reversely rotate, so that the second carriage retreats to the specified position.

3. The rotor dynamic balance correction device according to claim 1 or 2, characterized in that an adjusting screw (8) is screwed on the positioning block, the axis of the adjusting screw is parallel to the guide rail, and the adjusting screw can contact with the first dragging plate.

4. The rotor dynamic balance correcting device of claim 2, wherein the sensor comprises a magnetic steel (29), a coil (28), an amplifier, a rectifier filter and an A/D converter, the magnetic steel is U-shaped, the polarities of two arms of the magnetic steel are different, the bottom of the magnetic steel is connected with a first pulling plate, the coil is rectangular, one edge of the coil is inserted into an opening part of the magnetic steel, a framework (27) of the coil is fixed on a positioning block or a bed body, the coil is connected with the input end of the amplifier, the output end of the amplifier is connected with the input end of the A/D converter through the rectifier filter, and the output end of the A/D converter is the output end of the sensor.

Technical Field

The invention relates to a dynamic balance correction device of a rotor, which is used for verifying the dynamic balance of a motor rotor.

Background

The motor rotor can shift the center of gravity of the rotor to the axis due to uneven material quality in the manufacturing process, the smaller unbalanced mass can generate larger centrifugal force when rotating, the motor vibrates when running, the abrasion of the bearing is accelerated, and the service life of the motor is shortened. In order to eliminate the unbalance phenomenon caused by the gravity center shift, the rotor needs to be corrected for balance; the method for calibrating dynamic balance generally comprises measuring the unbalanced position and the unbalanced weight by a dynamic balance machine, and then balancing the rotor by weight, such as riveting a gasket on a balance column of the rotor or grinding a balanced rotor core to eliminate the gravity center offset; the method needs to test again after the counterweight to determine whether the counterweight is accurate, which is time-consuming and inefficient.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a correcting device for rotor dynamic balance, which can accurately and automatically balance the rotor and improve the working efficiency.

The technical scheme of the invention is that the rotor dynamic balance correcting device comprises a guide rail 1 which is arranged in parallel, a first dragging plate 15 is placed in the middle of the guide rail, a second dragging plate 16 is placed at one end of the guide rail, and a third dragging plate 5 is fixedly installed at the other end of the guide rail, and the rotor dynamic balance correcting device is characterized in that two ends of the first dragging plate are respectively provided with an ejector pin 14 which is pressed against a rotating shaft 11 of a rotor 10, and the axis of the rotating shaft is vertical to the guide rail; a belt pulley 2 is arranged on the third carriage 5, a belt 7 is connected between the belt pulley and the rotor iron core, the belt pulley is driven by a driving motor 3, a positioning block 9 is arranged on the guide rail, and one side of the first carriage, which faces the third carriage, can be attached to the positioning block; and a tool rest 18 is fixedly connected to the second carriage, a turning tool 21 is mounted on the tool rest and faces an end ring 22 of the rotor, a screw rod 19 is screwed in the second carriage, and the second carriage can move along the guide rail when the screw rod rotates.

The working principle of the correction device is that the belt pulley drives the rotor to rotate through the belt, centrifugal force generated by unbalanced mass of the rotor can enable the first dragging plate to move back and forth along the guide rail, the second dragging plate is pushed to enable the turning tool to be in contact with the rotor, the eccentric part of the rotor is cut, when the eccentric part is removed, the rotor reaches a balanced state, the elastic force of the belt enables the first dragging plate to be always attached to the positioning block, and the back and forth oscillation of the first dragging plate is stopped.

The using method is that the centre pin is used for propping against the central hole of the rotor rotating shaft, then the belt is sleeved, the driving motor is started, the feed lathe tool is used for cutting the eccentric part of the rotor end ring, when the eccentric part is removed, the rotor is in a balanced state, the driving motor is stopped, the centre pin is withdrawn, and the rotor is dismounted.

The correction device is characterized in that the steps of determining the unbalance point of the rotor and eliminating the unbalance point are synchronously carried out, so that the working efficiency is improved; whether the rotor reaches a balanced state or not can be accurately observed, and the balance correction precision is high; in addition, the balance correction device can adapt to the balance correction of rotors with different specifications.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a right side view of fig. 1.

Fig. 3 is a view taken along direction a of fig. 1.

Fig. 4 is an enlarged view of the sensor of fig. 1.

Fig. 5 is a schematic block diagram of the control device.

The figures are numbered: 1-guide rail, 2-belt pulley, 3-drive motor, 4-drive motor bracket, 5-third carriage, 6-fastening screw, 7-belt, 8-adjusting screw, 9-positioning block, 10-rotor, 11-rotating shaft, 12-hand wheel, 13-thimble support, 14-thimble, 15-first carriage, 16-second carriage, 17-lead screw support plate, 18-tool rest, 19-lead screw, 20-stepping motor, 21-turning tool, 22-end ring, 23-backing plate, 25-lathe bed, 26-baffle, 27-framework, 28-coil and 29-magnetic steel.

Detailed Description

A rotor dynamic balance correcting device comprises a machine body 25, a guide rail 1 is arranged on the upper portion of the machine body in parallel, a first dragging plate 15 is placed in the middle of the guide rail, a second dragging plate 16 is placed at one end of the guide rail, a third dragging plate 5 is installed at the other end of the guide rail, and the third dragging plate is fixed on the guide rail through a fastening screw 6. The edge of the first carriage is provided with a baffle 26 at the downward hanging part, and the baffle is attached to the bottom of the edge convex part of the guide rail.

Two ends of the first carriage are respectively fixedly connected with an ejector pin support 13, an ejector pin 14 is installed in the ejector pin support, the ejector pin is used for propping against a central hole of a rotating shaft 11 of the rotor 10, the axis of the rotating shaft is vertical to the guide rail, one ejector pin is fixed in the ejector pin support, the other ejector pin can move along the axis direction of the rotating shaft, and the position of the ejector pin can be adjusted by rotating a hand wheel 12; the thimble is adopted to position the rotating shaft, so that the accumulated error generated in the machining process of the excircle (the matching part of the bearing) of the rotating shaft can be effectively reduced, and the unbalance is fully reflected.

A driving motor support 4 is fixed on the third carriage 5, the driving motor is installed on the driving motor support, a belt pulley is connected with a main shaft of the driving motor 3, the belt pulley is connected with a rotor core through a belt 7, a positioning block 9 is fixedly installed on a guide rail between the first carriage and the third carriage, and the first carriage can be attached to the positioning block;

a tool rest 18 is fixedly connected to the second carriage, a tool bar of a turning tool 21 is fastened in a rectangular hole of the tool rest, a backing plate 23 is arranged between the tool bar and the rectangular hole, a cutting edge of the turning tool faces an end ring 22 of the rotor, the cutting edge of the turning tool is parallel to the outer circle surface of the end ring of the rotor, the width of the cutting edge of the turning tool is slightly smaller than that of the end ring of the rotor, a lead screw 19 is screwed in the second carriage, a polished rod part of the lead screw is inserted into a lead screw supporting plate 17, the supporting plate limits axial movement of the lead screw, and the second carriage can move along a guide rail when the lead screw rotates.

The belt be the flat belt, for conveniently adjusting the elasticity of belt, it has adjusting screw 8 to spin on the locating piece, and adjusting screw's axis is parallel with the guide rail, adjusting screw can with first drag the board contact. The tightness of the belt can be adjusted according to the weight of the rotor, the rotor is heavier, the belt is tight, and vice versa, so that the belt can adapt to rotors with different specifications.

The turning tools can be two and respectively correspond to the end rings on two sides of the rotor core.

The working principle of the correction device is that the belt pulley drives the rotor to rotate through the belt, the centrifugal force generated by the unbalanced mass of the rotor can enable the first dragging plate to deviate from the positioning block, the second dragging plate is pushed to enable the turning tool to be in contact with the rotor, the eccentric part of the rotor is cut, when the eccentric part is removed, the rotor reaches a balanced state, the elastic force of the belt enables the first dragging plate to be always attached to the positioning block, and the reciprocating oscillation of the first dragging plate is stopped.

The use method is that the centre pin is used for propping against the central hole of the rotor rotating shaft, then the belt is sleeved, the driving motor is started, the feed lathe tool is used for cutting the eccentric part of the rotor end ring, when the eccentric part is removed, the rotor is in a balanced state, the driving motor is stopped, the hand wheel 12 is rotated to withdraw the centre pin, and the rotor is dismounted.

The movement of the second carriage can be automatically controlled by a control device, the control device comprises a stepping motor 20 connected with the screw rod and a controller for controlling the stepping motor, a shell of the stepping motor is fixedly arranged on a screw rod supporting plate 17, the controller comprises a sensor, a single chip microcomputer and a driver, the output end of the sensor is connected with the input end of the single chip microcomputer, the output end of the single chip microcomputer is connected with the input end of the driver, and the output end of the driver is connected with the stepping motor;

the sensor converts the vibration of the first dragging plate into an electric signal, a program is arranged in the single chip microcomputer to judge the amplitude of the electric signal, when the amplitude of the electric signal is larger than or equal to a set value, the single chip microcomputer outputs a forward rotation instruction to the driver, and the driver drives the stepping motor to rotate forward, so that the second dragging plate advances to cut the rotor; when the amplitude of the electric signal is smaller than the set value, the single chip microcomputer outputs a reverse instruction to the driver, and the driver drives the stepping motor to reversely rotate, so that the second carriage retreats to the specified position.

The sensor can be a commercially available vibration sensor, the sensor can also be made by self and comprises magnetic steel 29, a coil 28, an amplifier, a rectifier filter and an A/D converter, the magnetic steel is U-shaped, the polarities of two arms of the magnetic steel are different, the bottom of the magnetic steel is connected with a first supporting plate, the coil is rectangular, one side of the coil is inserted into an opening part of the magnetic steel, a framework 27 of the coil is fixed on a positioning block or a lathe bed, the coil is connected with the input end of the amplifier, the output end of the amplifier is connected with the input end of the A/D converter through the rectifier, and the output end of the A/D converter is the output end of the sensor.

The working principle is that when the rotor is in an unbalanced state, the first dragging plate oscillates back and forth, the magnetic steel and the first dragging plate move synchronously, the coil induces an alternating voltage signal, when the rotor is close to balance or balance, the oscillation amplitude of the first dragging plate becomes small or zero, and the alternating voltage signal on the coil becomes small or zero; the alternating voltage signal on the coil is converted into a direct voltage signal by a rectifier filter after being amplified by an amplifier, and then the direct voltage signal is converted into a digital signal by an A/D converter and sent to the input end of the singlechip, and the singlechip judges the digital signal: when the digital signal is greater than or equal to the set value, the single chip microcomputer outputs a forward rotation instruction to the driver, and the driver drives the stepping motor to rotate forward to enable the second carriage to advance to cut the rotor; when the digital signal is smaller than the set value, the singlechip outputs a reverse instruction to the driver, and the driver drives the stepping motor to reverse, so that the second carriage retreats to the specified position.

The control device is adopted, manual operation of the second carriage is not needed, manual visual fatigue can be avoided, unbalanced mass can be accurately removed, and meanwhile, the leveling balance efficiency is further improved.