CN216066988U

CN216066988U - Double-balancing device of permanent magnet synchronous electric spindle

Info

Publication number: CN216066988U
Application number: CN202122882000.7U
Authority: CN
Inventors: 孔德海; 赵重喜; 梁兴
Original assignee: Anyang Laigong Technology Co ltd
Current assignee: Anyang Laigong Technology Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-03-18
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses a double-balancing device of a permanent magnet synchronous electric spindle, which consists of a rotor shaft, a dust cover, a front small cover, a bearing group I, a front big cover, a shell, a permanent magnet rotor part, a permanent magnet stator part, a rear bearing seat, a bearing group II and a rear cover, wherein an adjustable balancing device I and an adjustable balancing device II are arranged at the left end and the right end of the rotor shaft; an integrated vibration transmitter I is arranged on the outer diameter of the front big cover, and an integrated vibration transmitter II is arranged on the bearing seat. The change condition of the unbalance amount of the electric spindle is monitored on line in the running process of the electric spindle, the rotating part is not required to be disassembled, the relative position of the balance weight is adjusted, the unbalance amount is eliminated, the operation is convenient, the dynamic balance performance is improved, the noise and the energy consumption are reduced, and the abrasion of a bearing and the high-frequency fatigue damage of a rotor part are reduced.

Description

Double-balancing device of permanent magnet synchronous electric spindle

Technical Field

The utility model belongs to the technical field of numerical control spindles, and particularly relates to a double-balancing device of a permanent magnet synchronous electric spindle. .

Background

At present, when a permanent magnet synchronous grinding wheel electric spindle is used in a numerically controlled grinding machine, because the rotating speed of the electric spindle is high, in order to ensure the processing precision of the spindle at high speed, improve reliability and reduce the unbalance amount of the spindle, secondary dynamic balance is generally performed, when the spindle is assembled for the first time, static dynamic balance is performed on rotating parts such as a rotor shaft, front and rear nuts and the like, when the spindle is subjected to a no-load experiment for the second time, if the vibration value of the spindle is large, dynamic balance needs to be performed on the rotating parts such as the rotor shaft, the front end or the rear end of the spindle, but when the dynamic balance is performed, the front end or the rear end of the spindle needs to be disassembled, and by performing secondary or repeated processing on the rotating parts, a weight reduction or weight increase method is adopted for performing dynamic balance, the disassembly and assembly are troublesome, and the efficiency is low. Particularly, in the rotating machining process of the electric spindle, if the change of the unbalance amount is not found in time, the machining precision of the spindle is affected, the service life of a bearing is greatly affected, the spindle is damaged, the rotating part is disassembled again, and the production progress is seriously affected.

Disclosure of Invention

Aiming at the defects of the existing permanent magnet synchronous grinding wheel electric main shaft dynamic balance technology, the utility model provides a double balance device of a permanent magnet synchronous electric main shaft.

The technical scheme adopted by the utility model is as follows: a double-balancing device of a permanent magnet synchronous electric spindle comprises a rotor shaft, a dust cover, a front small cover, a bearing group I, a front large cover, a shell, a permanent magnet rotor part, a permanent magnet stator part, a bearing seat, a bearing group II and a rear cover, wherein the left end of the rotor shaft is provided with the balancing device I, and the right end of the rotor shaft is provided with the balancing device II; an integrated vibration transmitter I is arranged on the outer diameter of the front big cover, and an integrated vibration transmitter II is arranged on the bearing seat.

The balancing device I comprises a balancing nut and a circumferential balancing block I, the balancing nut is provided with a left section of the rotor shaft, the inner surface of the balancing nut is provided with a thread, the thread is matched with a thread section arranged on the outer diameter of the left section of the rotor shaft, and the right end face of the balancing nut is in close contact with the left end face of the bearing group I; the left end face of the balance nut is provided with an annular groove, and the right end face of the annular groove is provided with uniformly distributed threaded holes.

Furthermore, the circumferential balance block I is provided with a fan-shaped structure matched with the groove of the balance nut, and the middle part of the circumferential balance block I is provided with an arc-shaped step groove; circumference balancing piece I installs in balance nut's recess, fixes through the interior hexagonal screw in arc step groove and balance nut's screw hole cooperation.

Further, the number of the thread through holes of the balance nut annular groove is greater than or equal to 32.

The balance device II comprises a balance disc, a radial balance block and a circumferential balance block II, wherein a groove matched with the outer diameter of the right end of the rotor shaft is formed in the left end of the balance disc, and the balance disc is sleeved on the outer diameter of the right end of the rotor shaft; an annular groove is formed in the outer diameter of the balance disc, and threaded holes are uniformly distributed in the annular groove; the right end of the balance disc is provided with an annular groove, and the left end face of the annular groove is provided with uniformly distributed threaded holes; the circumference balancing block II is provided with a fan-shaped structure matched with the groove of the balancing disc, and the middle part of the circumference balancing block II is provided with an arc-shaped step groove.

Further, the inner surface of the radial balance block is provided with an annular structure which is matched with the outer surface of the annular groove of the outer diameter of the balance disc; and the balance disc is fixed in the outer diameter annular groove of the balance disc through a jackscrew.

Furthermore, the circumference balancing block II is provided with a balancing disc annular groove and is fixed through an inner hexagonal screw.

Further, the right-hand member of rotor shaft sets up the equipartition screw hole, and screw hole quantity more than or equal to 4.

Furthermore, the concave platform at the left end of the balance disc is in interference fit with the right end of the rotor shaft, and the left end face of the balance disc is in close contact with the right end face of the bearing group II.

Further, the number of the threaded through holes of the annular groove at the right end of the balance disc is greater than or equal to 32.

Further, the number of the threaded holes of the outer diameter annular groove of the balance disc is more than or equal to 18.

The utility model has the beneficial effects that: a permanent magnet synchronous electric main shaft double-balancing device is characterized in that integrated vibration transmitters are arranged at two ends of an electric main shaft, the change condition of the unbalance amount of the electric main shaft is monitored on line in the running process of the electric main shaft, and the automation degree of a machine tool is high; 2. the adjustable dynamic balance devices are arranged at the two ends of the rotor shaft of the machine tool spindle, when the unbalance amount is adjusted, the relative position of the balance block is adjusted only without disassembling the rotating part for weight reduction, the operation complexity is reduced, the adjustment amount can be further refined by respectively adjusting the adjustable devices at the two ends of the rotor shaft, the dynamic balance performance is improved, the noise and the energy consumption are reduced, and the abrasion of the bearing and the high-frequency fatigue damage of the rotor part are reduced; 4. when the unbalance amount is verified, the debugging result can be timely detected by the vibration measuring instrument through the transmission function of the integrated vibration transmitter, and the debugging efficiency is high.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a double balancing device of a permanent magnet synchronous electric spindle.

Fig. 2 is a schematic structural view of the balance nut.

Fig. 3 is a schematic structural view of the balance disk.

FIG. 4 is a schematic view of a circumferential weight.

FIG. 5 is a schematic view of a radial counterweight.

In the figure, the reference numeral 1 is a rotor shaft, 2 is a dust cover, 3 is a circumferential balance block I, 4 is a balance nut, 5 is a front small cover, 6 is a bearing group I, 7 is an integrated vibration transmitter I, 8 is a front big cover, 9 is a shell, 10 is a permanent magnet stator component, 11 is a permanent magnet rotor component, 12 is a bearing seat, 13 is an integrated vibration transmitter II, 14 is a bearing group II, 15 is a radial balance block, 16 is a balance disc, 17 is a circumferential balance block II, and 18 is a rear cover.

Detailed Description

The double balancing device of the permanent magnet synchronous electric spindle of the present invention is described in more detail with reference to fig. 1 to 4 and by means of specific embodiments.

It is to be noted that in the present invention, unless otherwise explicitly specified and limited, the terms: the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the connection may be a fixed connection, an integral connection, a direct connection, a detachable connection, or the like. The specific meaning of the above terms in the utility model can be understood according to specific situations by those skilled in the art.

As shown in fig. 1, the double balancing device of the permanent magnet synchronous electric spindle of the present invention comprises a rotor shaft 1, a dust cover 2, a front small cover 3, a bearing group i 6, a front large cover 8, a housing 9, a permanent magnet stator part 10, a permanent magnet rotor part 11, a bearing seat 12, a bearing group ii 14, and a rear cover 18, wherein the left end of the rotor shaft 1 is provided with a balancing device i for adjusting the unbalance amount of the left end of the electric spindle; the right end of the rotor shaft is provided with a balance device II for adjusting the unbalance amount of the right end of the electric main shaft; an integrated vibration transmitter I7 is arranged on the outer diameter of the front big cover 8 to detect the vibration value of the left end of the electric spindle, and an integrated vibration transmitter II 13 is arranged on the bearing seat to detect the vibration value of the right end of the electric spindle.

As shown in fig. 1 and 2, the balancing device i comprises a balancing nut 4 and a circumferential balancing block i 3, the balancing nut 4 is provided with a left section for mounting the rotor shaft 1, a thread is provided on the inner surface of the balancing nut 4, the thread is matched with a thread section provided on the outer diameter of the left section of the rotor shaft 1, and the right end surface of the balancing nut 4 is in close contact with the left end surface of the bearing group i 6, so as to prevent the bearing group i 6 from moving axially; the balance nut 4 is provided with an annular groove at the left end face and threaded holes which are uniformly distributed at the right end face of the annular groove.

Furthermore, the circumferential balance block I3 is provided with a fan-shaped structure matched with the groove of the balance nut 4, and the middle part of the circumferential balance block I3 is provided with an arc-shaped step groove; the circumferential balance block I3 is arranged in a groove of the balance nut 4 and is fixed by matching an inner hexagonal screw of the arc-shaped step groove with a threaded hole of the balance nut 4; the unbalance amount of the left end of the rotor shaft 1 is adjusted by adjusting the position of the circumferential balance block I3 in the annular groove, and the vibration value of the electric spindle during rotation is reduced.

Further, the number of the thread through holes of the annular groove of the balance nut 4 is more than or equal to 32.

As shown in fig. 1, 3, 4 and 5, the balancing device ii includes a balancing disk 16, a radial balancing block 15 and a circumferential balancing block ii 17, the left end of the balancing disk 16 is provided with a groove adapted to the outer diameter of the right end of the rotor shaft 1, and the balancing disk 16 is sleeved on the outer diameter of the right end of the rotor shaft 1; an annular groove is formed in the outer diameter of the balance disc 16, and threaded holes are uniformly distributed in the annular groove; the right end of the balance disc 16 is provided with an annular groove, and the left end surface of the annular groove is provided with uniformly distributed threaded holes; the second circumferential balance block 17 is provided with a fan-shaped structure matched with the groove of the balance disc 16, and the middle part of the second circumferential balance block 17 is provided with an arc-shaped step groove.

Further, the inner surface of the radial balance weight 15 is provided with an annular structure which is matched with the outer surface of the outer diameter annular groove of the balance disc 16 in a facing mode, and the annular structure is fixed in the outer diameter annular groove of the balance disc 16 through a jackscrew.

Further, the circumferential balance block II 17 is provided with an annular groove for mounting a balance disc 16 and is fixed through an inner hexagonal screw; the unbalance amount at the right end of the rotor shaft 1 is adjusted by adjusting the positions of the radial balance blocks 15 and the circumferential balance blocks 17 in the annular grooves of the balance disc 16, so that the vibration value of the electric spindle during rotation is reduced.

Further, the right end of the rotor shaft 1 is provided with uniformly distributed threaded holes, the number of the threaded holes is more than or equal to 4, and the balance disc 16 is fixed through bolts and threads.

Further, the concave platform at the left end of the balance disc 16 is in interference fit with the right end of the rotor shaft 1, and the left end face of the balance disc 16 is in close contact with the right end face of the bearing group II 14, so that the axial movement of the bearing group II 14 is prevented.

Further, the number of the threaded through holes of the annular groove at the right end of the balance disc 16 is greater than or equal to 32.

Further, the number of the threaded holes of the outer diameter annular groove of the balance disc 16 is more than or equal to 18.

The use process or working state of the utility model is as follows: firstly, when the rotor shaft 1 is in static dynamic balance, if the unbalance amount is out of tolerance, the balance device I and the balance device II at two ends of the rotor shaft 1 can be adjusted, namely the relative position of a circumferential balance block I3 in the balance device I and the relative positions of a circumferential balance block 17 and a radial balance block 15 in the balance device II are adjusted, and the unbalance amount of a main shaft rotating part is reduced; in the rotation process of the electric spindle, the integrated vibration transmitter I7 and the integrated vibration transmitter II 13 at the two ends feed back the change condition of the vibration value in time, if the vibration value is out of tolerance, the precision of a machined part is influenced, the electric spindle stops running, the adjustment is carried out according to the specific position condition of the vibration value, if the vibration value at the left end is large, the dust cover 2 at the left end of the electric spindle can be detached, and the balance device I is adjusted; if the vibration value of the right end is large, the rear cover 18 at the right end of the electric spindle can be detached, and the balance device II is adjusted.

The above embodiments should not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent transformations fall within the scope of the present invention.

Claims

1. The utility model provides a synchronous electric main shaft's of permanent magnetism double balance device, by rotor shaft (1), dust cover (2), preceding tegillum (5), bearing group I (6), preceding big lid (8), casing (9), permanent magnet stator part (10), permanent magnet rotor part (11), bearing frame (12), bearing group II (14), back lid (18) are constituteed, its characterized in that: the left end of the rotor shaft (1) is provided with a balancing device I, and the right end of the rotor shaft (1) is provided with a balancing device II; an integrated vibration transmitter I (7) is arranged and installed on the outer diameter of the front big cover (8), and an integrated vibration transmitter II (13) is arranged and installed on the bearing seat (12).

2. The double balancing apparatus of the permanent magnet synchronous electric spindle according to claim 1, wherein: the balancing device I comprises a balancing nut (4) and a circumferential balancing block I (3), wherein the balancing nut (4) is provided with a left section for mounting the rotor shaft (1), the inner surface of the balancing nut (4) is provided with a thread, and the thread is matched with a thread section arranged on the outer diameter of the left section of the rotor shaft (1); the right end face of the balance nut (4) is in close contact with the left end face of the bearing group I (6); the left end face of the balance nut (4) is provided with an annular groove, and the right end face of the annular groove is provided with uniformly distributed threaded holes; circumference balancing piece I (3) set up the fan-shaped structure with balance nut groove looks adaptation, and I (3) middle part of circumference balancing piece sets up arc step groove, and I (3) setting of circumference balancing piece is installed in balance nut (4) annular groove, and is fixed through the hexagon socket head cap screw.

3. The double balancing apparatus of the permanent magnet synchronous electric spindle according to claim 1, wherein: the balance device II comprises a balance disc (16), a radial balance block (15) and a circumferential balance block II (17), wherein a groove matched with the outer diameter of the right end of the rotor shaft (1) is formed in the left end of the balance disc (16), and the balance disc (16) is sleeved on the outer diameter of the right end of the rotor shaft (1); the outer diameter of the balance disc (16) is provided with an annular groove, and the annular groove is provided with threaded holes which are uniformly distributed; the right end of the balance disc (16) is provided with an annular groove, and the left end surface of the annular groove is provided with threaded holes which are uniformly distributed; and the second circumferential balance block (17) is provided with a fan-shaped structure matched with the groove of the balance disc (16), the middle part of the second circumferential balance block (17) is provided with an arc-shaped step groove, and the second circumferential balance block (17) is provided with an annular groove for mounting the balance disc (16) and is fixed by an inner hexagonal screw.

4. The double balancing apparatus of the permanent magnet synchronous electric spindle according to claim 2, wherein: the number of the thread through holes of the annular groove of the balance nut (4) is more than or equal to 32.

5. The double balancing apparatus of the permanent magnet synchronous electric spindle according to claim 3, wherein: the inner surface of the radial balance block (15) is provided with an annular structure matched with the outer surface of the outer diameter annular groove of the balance disc (16) in a facing mode, and the annular structure is fixed in the outer diameter annular groove of the balance disc (16) through jackscrews.

6. The double balancing device of a permanent magnet synchronous electric spindle according to claim 1, 2 or 3, characterized in that: the right end of the rotor shaft (1) is provided with uniformly distributed threaded holes, and the number of the threaded holes is more than or equal to 4.

7. The double balancing apparatus of a permanent magnet synchronous electric spindle according to claim 3 or 5, wherein: the concave station at the left end of the balance disc (16) is in interference fit with the right end of the rotor shaft (1), and the left end face of the balance disc (16) is in close contact with the right end face of the bearing group II (14).

8. The double balancing apparatus for a permanent magnet synchronous electric spindle according to any one of claims 3, 5 or 7, wherein: the number of the threaded through holes of the annular groove at the right end of the balance disc (16) is more than or equal to 32; the number of the threaded holes of the outer diameter annular groove of the balance disc (16) is more than or equal to 18.