CN220915081U - Double-cantilever motor rotor connecting structure - Google Patents

Abstract

The utility model relates to the technical field of motor equipment, in particular to a double-cantilever motor rotor connecting structure which comprises a left pull rod, a left lock nut, a first impeller, a motor rotor, a second impeller, a right pull rod and a right lock nut, wherein the left pull rod is connected with the left lock nut; the motor double cantilever shafts are connected with the first impeller and the second impeller by adopting end face tooth structures, and have the advantages of good repeated centering precision and large transmission torsion. The connecting threads at the two ends are equidirectional threads, the axial force required by the axial deformation of the first impeller and the second impeller and the torque transmission of the end face teeth under the rated working condition is calculated to obtain the pretightening force F of the pull rod of the first impeller and the pretightening force F of the second impeller at the two ends, the large end of the pretightening force is determined to be the preferential assembly side, and the torque M required by the nut is required when the left side and the right side of the pretightening force F are respectively reached, so that the problem of small installation space of the high-speed permanent magnet motor is solved.

Description

Double-cantilever motor rotor connecting structure

Technical Field

The utility model relates to the technical field of motor equipment, in particular to a double-cantilever motor rotor connecting structure.

Background

With the development of the high-speed permanent magnet motor technology, the high-speed direct-drive turbine equipment adopting the motor to directly drive the impeller to do work is more and more favored by the vast users due to the characteristics of high transmission efficiency, simple structure, low investment cost, small occupied space and the like.

The high-speed direct-drive turbine is characterized in that the impeller is directly arranged on a high-speed permanent magnet motor shaft through the tensioning device, and the high-speed direct-drive turbine has the characteristics of simple structure and high transmission efficiency, but also has the defects of narrow installation space, special tool requirement for assembly and disassembly, and the like.

Disclosure of utility model

The utility model aims to provide a double-cantilever motor rotor connecting structure, which aims to solve the problem of small installation space of a high-speed permanent magnet motor.

In order to achieve the above purpose, the utility model provides a double-cantilever motor rotor connecting structure, which comprises a left pull rod, a left lock nut, a first impeller, a motor rotor, a second impeller, a right pull rod and a right lock nut;

The left side lock nut with left side pull rod threaded connection, and be located one side of left side pull rod, first impeller set up in one side of pull rod, motor rotor with first impeller fixed connection, and be located one side of first impeller, the second impeller with motor rotor fixed connection, and be located motor rotor keeps away from one side of first impeller, right side pull rod with motor rotor fixed connection, and be located motor rotor keeps away from one side of first impeller, right side lock nut set up in right side pull rod.

The double-cantilever motor rotor connecting structure further comprises a tool and a pre-tightening screw, wherein the tool is arranged on one side of the motor rotor, and the pre-tightening screw is arranged on one side of the tool.

According to the double-cantilever motor rotor connecting structure, the motor double-cantilever shafts are connected with the first impeller and the second impeller by adopting the end face tooth structure, and the double-cantilever motor rotor connecting structure has the advantages of being good in repeated centering precision and large in torque transmission. The connecting threads at the two ends are equidirectional threads, the axial force required by axial deformation of the first impeller and the second impeller and torque transmission of end face teeth under rated working conditions is calculated to obtain the pretightening force F of the pull rods of the first impeller and the second impeller at the two ends respectively, the large pretightening force end is determined to be a preferential assembly side, and the torque M required by the nuts is required when the left side and the right side respectively reach the required pretightening force F, so that the whole structure is simple, the assembly and the disassembly are convenient, and complex tools are not required; the pretightening force can be accurately controlled; the space utilization is high, and special space is not required to be reserved for assembly and disassembly, so that the problem of small installation space of the high-speed permanent magnet motor is solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a sectional view of a connection structure of a rotor connection structure of a double cantilever motor according to the present utility model.

Fig. 2 is a cross-sectional view of a pre-tightening structure of a rotor connection structure of a double cantilever motor according to the present utility model.

FIG. 3 is a cross-sectional view of a pre-tightening tool structure of a double-cantilever motor rotor connection structure of the utility model.

101-Left pull rod, 102-left lock nut, 103-first impeller, 104-motor rotor, 105-second impeller, 106-right pull rod, 107-right lock nut, 108-frock, 109-pretension screw.

Detailed Description

Referring to fig. 1 to 3, fig. 1 is a sectional view of a connection structure of a rotor connection structure of a dual-cantilever motor according to the present utility model, fig. 2 is a sectional view of a pretensioning structure of a rotor connection structure of a dual-cantilever motor according to the present utility model, and fig. 3 is a sectional view of a pretensioning tool structure of a rotor connection structure of a dual-cantilever motor according to the present utility model.

The utility model discloses a double-cantilever motor rotor connecting structure, which comprises a left pull rod 101, a left lock nut 102, a first impeller 103, a motor rotor 104, a second impeller 105, a right pull rod 106, a right lock nut 107, a tool 108 and a pre-tightening screw 109, and solves the problem of small installation space of a high-speed permanent magnet motor through the scheme.

For this embodiment, the left lock nut 102 is in threaded connection with the left pull rod 101 and is located on one side of the left pull rod 101, the first impeller 103 is disposed on one side of the pull rod, the motor rotor 104 is fixedly connected with the first impeller 103 and is located on one side of the first impeller 103, the second impeller 105 is fixedly connected with the motor rotor 104 and is located on one side of the motor rotor 104 far away from the first impeller 103, the right pull rod 106 is fixedly connected with the motor rotor 104 and is located on one side of the motor rotor 104 far away from the first impeller 103, the right lock nut 107 is disposed on one side of the right pull rod 106, and the motor double-suspension is connected with the first impeller 103 and the second impeller 105 by adopting an end face tooth structure, so that the advantages of good repeated centering precision and large transmission torque are achieved. The connecting threads at the two ends are equidirectional threads, the axial force required by axial deformation of the first impeller 103 and the second impeller 105 and end face tooth torque transmission under the rated working condition is calculated to obtain the pretightening force F of the pull rods of the first impeller 103 and the second impeller 105 at the two ends respectively, the large end of the pretightening force is determined to be a preferential assembly side, and the torque M required by the nuts is required when the left side and the right side respectively reach the required pretightening force F, so that the whole structure is simple, the assembly and the disassembly are convenient, and complex tools are not required; the pretightening force can be accurately controlled; the space utilization is high, and special space is not required to be reserved for assembly and disassembly, so that the problem of small installation space of the high-speed permanent magnet motor is solved.

The tool 108 is arranged on one side of the motor rotor 104, the pre-tightening screw 109 is arranged on one side of the tool 108, the tool 108 is installed on one end of a shaft through an end face tooth with an outer hexagonal head, the screw is screwed according to conventional torque, the tool 108 is fixed through a hexagonal fixed wrench, the right locking nut 107 is pre-tightened through a torque wrench on the other side, and one side pre-tightening is completed when the pre-tightening torque is calculated. The tool 108 is disassembled, the second impeller 105 is mounted on a shaft, a hexagonal fixed wrench is used for fixing a pre-tightening nut, a torque wrench is used for pre-tightening the right locking nut 107 at the other side, when the pre-tightening torque is calculated, the whole rotor pre-tightening is completed, and the other end cannot loosen when one end is pre-tightened through the same-direction threads; by pre-tightening the high torque second impeller 105 first, it is ensured that no over-pre-tightening force occurs when pre-tightening the low torque first impeller 103.

The motor double-cantilever motor rotor connecting structure of the embodiment is characterized in that the motor double-cantilever shaft is connected with the first impeller 103 and the second impeller 105 by adopting an end face tooth structure, and has the advantages of good repeated centering precision and large transmission torsion. The connecting threads at the two ends are equidirectional threads, the axial force required by the axial deformation of the first impeller 103 and the second impeller 105 and the torque transmission of the end face teeth under the rated working condition is calculated to obtain the pretightening force F of the pull rod of the first impeller 103 and the pretightening force F of the second impeller 105, the big end of the pretightening force is determined to be a preferential assembly side, the torque M required by the nut is required when the left side and the right side of the pretightening force F are respectively reached, when pretightening is required, the end face teeth with the outer hexagon head are installed on one end of the tool 108 of the shaft by using the screw, the screw is screwed according to the conventional torque, the tool 108 is fixed by using the hexagonal fixed wrench, the pretightening is performed on the right side locking nut 107 by using the torque wrench, and one side pretightening is completed when the pretightening torque is calculated. The tool 108 is disassembled, the second impeller 105 is mounted on a shaft, a hexagonal fixed wrench is used for fixing a pre-tightening nut, a torque wrench is used for pre-tightening the right locking nut 107 at the other side, when the pre-tightening torque is calculated, the whole rotor pre-tightening is completed, and the other end cannot loosen when one end is pre-tightened through the same-direction threads; the second impeller 105 with large moment is pre-tightened first, so that the first impeller 103 with small moment is pre-tightened, the pre-tightening force is not generated, the whole structure is simple, the assembly and the disassembly are convenient, and complex tools are not needed; the pretightening force can be accurately controlled; the space utilization is high, and special space is not required to be reserved for assembly and disassembly, so that the problem of small installation space of the high-speed permanent magnet motor is solved.

The foregoing disclosure is only illustrative of one or more preferred embodiments of the present application, and it is not intended to limit the scope of the claims hereof, as persons of ordinary skill in the art will understand that all or part of the processes for practicing the embodiments described herein may be practiced with equivalent variations in the claims, which are within the scope of the application.

Claims (2)

1. A double cantilever motor rotor connection structure is characterized in that,

The motor comprises a left pull rod, a left lock nut, a first impeller, a motor rotor, a second impeller, a right pull rod and a right lock nut;

The left side lock nut with left side pull rod threaded connection, and be located one side of left side pull rod, first impeller set up in one side of pull rod, motor rotor with first impeller fixed connection, and be located one side of first impeller, the second impeller with motor rotor fixed connection, and be located motor rotor keeps away from one side of first impeller, right side pull rod with motor rotor fixed connection, and be located motor rotor keeps away from one side of first impeller, right side lock nut set up in right side pull rod.

2. A dual cantilever motor rotor coupling structure according to claim 1, wherein,

The double-cantilever motor rotor connecting structure further comprises a tool and a pre-tightening screw, wherein the tool is arranged on one side of the motor rotor, and the pre-tightening screw is arranged on one side of the tool.