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CN-122013991-A - Vibrating assembly based on cantilever shaft and processing method thereof

CN122013991ACN 122013991 ACN122013991 ACN 122013991ACN-122013991-A

Abstract

The invention discloses a vibrating assembly based on a cantilever shaft and a processing method thereof, and relates to the technical field of vibrating equipment, and the vibrating assembly comprises a permanent magnet synchronous motor which is used for determining a driving system according to the use condition and the excitation requirement of the vibrating assembly, wherein the permanent magnet synchronous motor consists of a motor stator and a motor rotor, and the mass and the eccentric radius of an eccentric block for generating excitation force are determined based on the excitation requirement; the motor stator is fixedly arranged in the shell, the motor rotor is fixedly connected to one end of the motor rotating shaft, the eccentric block is fixedly arranged on the motor rotating shaft, and the rolling bearing I and the rolling bearing II are respectively arranged on the motor rotating shaft on two axial sides of the eccentric block. The invention actively sets the cantilever section of the motor rotating shaft in structural design, but not simply avoids the cantilever structure, and the position and the range of the cantilever section are definitely defined in structure by arranging the eccentric block between two groups of bearings and enabling the motor rotor to be positioned at the outer side of one bearing.

Inventors

  • LIU XING

Assignees

  • 合肥鑫众机械有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (8)

  1. 1. The method for processing the vibrating assembly based on the cantilever shaft is characterized by comprising the following steps of: S1, determining that a permanent magnet synchronous motor is adopted in a driving system according to the use condition and the excitation requirement of a vibrating assembly, wherein the permanent magnet synchronous motor consists of a motor stator (7) and a motor rotor (8), and determining the mass and the eccentric radius of an eccentric block (4) for generating excitation force based on the excitation requirement; S2, fixedly mounting a motor stator (7) in the shell (3), and fixedly connecting a motor rotor (8) to one end of a motor rotating shaft (5); S3, fixedly mounting the eccentric block (4) on a motor rotating shaft (5), respectively arranging at least one group of first rolling bearings (2) and at least one group of second rolling bearings (6) on the motor rotating shaft (5) on two axial sides of the eccentric block (4), and fixedly mounting outer rings of the first rolling bearings (2) and the second rolling bearings (6) in the shell (3); s4, limiting the axial positions of the first rolling bearing (2) and the second rolling bearing (6) to enable the motor rotor (8) to be located on one side, far away from the eccentric block (4), of the first rolling bearing (2), so that a cantilever section is formed on the part, covered by the motor rotor (8), of the motor rotating shaft (5); S5, under the action of centrifugal load generated by the eccentric block (4), calculating the maximum deflection offset of the tail end of the cantilever section, and comparing the maximum deflection offset with a working air gap value between the motor rotor (8) and the motor stator (7); and when the maximum deflection offset is smaller than the working air gap value, judging that the vibrating assembly meets the operation requirement.
  2. 2. The method according to claim 1, wherein after S5, the equivalent dynamic load borne by the first rolling bearing (2) and the second rolling bearing (6) is calculated according to the mass of the eccentric block (4), the eccentric radius, and the operating rotation speed of the motor shaft (5), and whether the calculated life satisfies the preset life design requirement is checked.
  3. 3. The method for processing the vibrating assembly based on the cantilever shaft according to claim 2, wherein the rolling bearing one (2) and the rolling bearing two (6) are the same cylindrical roller bearing.
  4. 4. A method of manufacturing a cantilever shaft-based vibrating assembly according to claim 3, wherein the coaxiality tolerance level of each bearing mounting hole is controlled to be not lower than level 4 when the first rolling bearing (2) and the second rolling bearing (6) are mounted in the housing (3).
  5. 5. The method for processing the vibrating assembly based on the cantilever shaft according to claim 1, wherein in S2, after the motor rotor (8) is fixedly connected to one end of the motor rotating shaft (5), an extraction space for extracting the motor lead-out wire (11) is further provided; The outlet space is located in the housing (3) and radially outside the cantilever section and the first rolling bearing (2).
  6. 6. The vibrating assembly based on the cantilever shaft is characterized in that the vibrating assembly is processed by the vibrating assembly processing method according to any one of claims 1-5, and comprises a shell (3), a permanent magnet synchronous motor, a motor rotating shaft (5), an eccentric block (4), a rolling bearing I (2) and a rolling bearing II (6); The permanent magnet synchronous motor comprises a motor stator (7) and a motor rotor (8), wherein the motor stator (7) is fixedly arranged in the shell (3), and the motor rotor (8) is fixedly connected to one end of the motor rotating shaft (5); the eccentric block (4) is fixedly arranged on the motor rotating shaft (5); the first rolling bearing (2) and the second rolling bearing (6) are both arranged on the motor rotating shaft (5) and are respectively positioned at two axial sides of the eccentric block (4), and outer rings of the first rolling bearing (2) and the second rolling bearing (6) are fixedly arranged in the shell (3), so that a double-support structure is formed on the motor rotating shaft (5) at two sides of the eccentric block (4); the motor rotor (8) is positioned on one side of the first rolling bearing (2) far away from the eccentric block (4), so that a cantilever section is formed by the motor rotating shaft (5) covered by the motor rotor (8).
  7. 7. The vibrating assembly based on the cantilever shaft according to claim 6, wherein a front plug (1) and a rear plug (12) are respectively arranged at two axial ends of the housing (3), and the front plug (1) and the rear plug (12) are fixedly mounted on the housing (3).
  8. 8. The vibrating assembly based on the cantilever shaft according to claim 7, characterized in that a vibration-proof insulating sealing plug (9) is arranged in the shell (3), the vibration-proof insulating sealing plug (9) is arranged on one side of the motor rotor (8) away from the eccentric block (4), and the vibration-proof insulating sealing plug (9) is arranged on the shell (3); The motor stator (7) is electrically connected with a motor outgoing line (11), and the motor outgoing line (11) is led out from the shell (3) after penetrating through the vibration-proof insulating sealing plug (9).

Description

Vibrating assembly based on cantilever shaft and processing method thereof Technical Field The invention relates to the technical field of vibration equipment, in particular to a vibrating assembly based on a cantilever shaft and a processing method thereof. Background The eccentric concrete vibrating rod with the inserted built-in motor is required to be inserted into substances such as concrete and the like for vibration operation when in use, and the whole structure of the eccentric concrete vibrating rod is generally in an elongated shape, the outer diameter of a rod body of the existing concrete vibrating rod is generally 38mm, 45mm, 50mm, 56mm and the like, and the length of the rod body is generally more than 400-600 mm; In order to avoid the motor rotating shaft forming a cantilever structure and generating larger deflection during high-speed operation, the prior art generally adopts a mode of increasing the number of bearings to carry out multipoint support on the rotating shaft, for example, a group of bearings with smaller size are arranged at one end close to a motor outgoing line to provide support for the motor rotating shaft, and the motor outgoing line is led out from an annular area between the periphery of the bearings and a shell; the application provides a vibrating assembly based on a cantilever shaft and a processing method thereof, which are characterized in that a plurality of groups of bearings are used for avoiding the design scheme of a cantilever structure, a plurality of problems are exposed in practical application, on one hand, the bearing capacity of a small-size bearing adopted near one end of a motor outgoing line is limited, the bearing capacity, the safety and the operation stability of the rotating shaft cantilever are difficult to be considered in a slender vibrating rod structure simply by increasing the number of bearings, on the other hand, the motor outgoing line penetrates out in a narrow annular space and is easy to rub with a shell or a hole wall under a vibrating working condition, so that an insulating layer is worn and potential safety hazards are caused, in addition, the plurality of groups of bearings simultaneously support the same motor rotating shaft, the requirement on the mounting coaxiality is extremely high, the practical processing and assembly are difficult to ensure, and the operation instability of the rotating shaft is easy to be caused, and therefore, the bearing capacity, the safety and the operation stability are difficult to be considered in the slender vibrating rod structure simply by increasing the number of bearings. Disclosure of Invention The invention aims to provide a vibrating assembly based on a cantilever shaft and a processing method thereof, so as to solve the problems in the prior art. The invention can be realized by the following technical scheme that the vibrating assembly processing method based on the cantilever shaft comprises the following steps: s1, determining that a permanent magnet synchronous motor is adopted in a driving system according to the use condition and the excitation requirement of a vibrating assembly, wherein the permanent magnet synchronous motor consists of a motor stator and a motor rotor, and determining the mass and the eccentric radius of an eccentric block for generating excitation force based on the excitation requirement; S2, fixedly mounting a motor stator in the shell, and fixedly connecting a motor rotor to one end of a motor rotating shaft; S3, fixedly mounting the eccentric block on a motor rotating shaft, respectively arranging at least one group of rolling bearings I and at least one group of rolling bearings II on the motor rotating shaft on two axial sides of the eccentric block, and fixedly mounting outer rings of the rolling bearings I and the rolling bearings II in a shell; S4, limiting the axial positions of the first rolling bearing and the second rolling bearing to enable the motor rotor to be located on one side, far away from the eccentric block, of the first rolling bearing, so that a cantilever section is formed on a motor rotating shaft part covered by the motor rotor; S5, calculating the maximum deflection offset of the tail end of the cantilever section under the action of centrifugal load generated by the eccentric block, comparing the maximum deflection offset with a working air gap value between the motor rotor and the motor stator, and judging that the vibrating assembly meets the operation requirement when the maximum deflection offset is smaller than the working air gap value. After S5, according to the mass of the eccentric block, the eccentric radius and the working rotation speed of the motor rotating shaft, the equivalent dynamic load born by the first rolling bearing and the second rolling bearing is calculated, and whether the calculated service life meets the preset service life design requirement is checked. The invention further technically improves that the