CN219012869U - Compressor rotor structure and compressor - Google Patents

Abstract

The utility model provides a compressor rotor structure and a compressor, relates to the technical field of compressors, and solves the technical problems that a coaxial direct-drive compressor rotor structure is overlong and is easy to generate flexible deformation. The compressor rotor structure comprises a driving rotor and a motor, wherein the motor is integrated inside the driving rotor so as to form a shaftless self-driving structure between the motor and the driving rotor; the motor comprises a motor rotor and a motor stator, wherein the motor rotor is embedded in the cavity of the driving rotor, and the motor stator is arranged in the cavity of the motor rotor in a penetrating way; the two ends of the motor rotor are rotationally connected with the motor stator through bearings and bearing seats. According to the utility model, the motor is integrated in the active rotor of the compressor, so that the size of the compressor is greatly reduced, the motor and the active rotor of the compressor are integrally supported, the cantilever structure is eliminated, and the running reliability of the machine is improved; the motor rotor and the active rotor of the compressor are in an integrated structure, so that the motor rotor and the active rotor of the compressor are self-driven without a shaft, and the mechanical efficiency is more excellent.

Description

Compressor rotor structure and compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a compressor rotor structure and a compressor.

Background

As shown in fig. 1, in the semi-closed screw compressor, a motor stator 1 is fixed in a compressor shell 2, a motor rotor 3 is provided with a through hole and is fixed on a driving rotor 4 of the compressor, and a bearing 5 supports and limits the driving rotor 4 and simultaneously supports and limits the motor rotor 3 relative to the motor stator 1, so that the structure of the whole motion rotary shaft system is simplified, the coaxial direct driving of the motor to the driving rotor 4 is realized, and the mechanical efficiency is improved.

However, compared with an external motor structure, only the shaft connection length, such as a coupling, is omitted, the total length of the compressor still comprises the motor length and the rotor length, the overall size is not greatly reduced, and meanwhile, the fixing mode of the motor rotor 3 is usually a cantilever supporting structure, namely, one side, close to the driving rotor 4, is provided with a bearing 5 for supporting and limiting, and the motor rotor at the other side is suspended, and can generate flexible deformation in actual operation, so that the risk of overhigh vibration and even the motor rotor rubs against the motor stator is brought.

Disclosure of Invention

The utility model aims to provide a compressor rotor structure and a compressor, which are used for solving the technical problems of overlong coaxial direct-drive compressor rotor structure and easy occurrence of flexible deformation in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

in a first aspect, the present utility model provides a compressor rotor structure comprising a driving rotor and a motor, wherein the motor is integrated inside the driving rotor to form a shaftless self-driven structure between the motor and the driving rotor.

In some embodiments, the motor includes a motor rotor embedded in the active rotor cavity and a motor stator threaded in the motor rotor cavity.

In some embodiments, a multi-point support structure is between the motor rotor and the motor stator.

In some embodiments, two ends of the motor rotor are rotatably connected with the motor stator through a bearing and a bearing seat.

In some embodiments, the motor stator has an extension bar at both ends, and the bearing housing are disposed at the extension bar location.

In a second aspect, the present utility model provides a compressor comprising a housing and the compressor rotor structure disposed within the housing.

In some embodiments, the motor stator in the compressor rotor structure is secured at both ends to the housing.

In some embodiments, the compressor is a semi-hermetic screw compressor.

Compared with the prior art, the utility model has the following beneficial effects:

according to the compressor rotor structure, the motor is integrated in the active rotor of the compressor, so that the size of the compressor is greatly reduced;

according to the compressor rotor structure, the motor rotor and the compressor driving rotor are integrally arranged, so that compared with the conventional coaxial direct drive, the motor rotor and compressor driving rotor integrated structure is shaftless self-driven, and the mechanical efficiency is quite high;

according to the compressor rotor structure provided by the utility model, the motor and the compressor driving rotor are integrally supported, so that the cantilever structure is eliminated, and the operation reliability of the machine is improved;

according to the compressor rotor structure provided by the utility model, the embedded motor and the compressor driving rotor are mutually independent, the integrated structure is realized through simple assembly, the machining and assembly manufacturability is excellent, and the practical engineering application is easy to realize.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a prior art rotor configuration in a single stage compressor;

fig. 2 is a schematic view of a compressor rotor structure according to the present utility model.

In the figure 1, a motor stator; 2. a housing; 3. a motor rotor; 4. a driving rotor; 5. a bearing; 6. and a bearing seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

As shown in fig. 2, the present utility model provides a rotor structure of a compressor, which includes a driving rotor 4 and a motor for driving the driving rotor 4 to operate, wherein the motor is integrated inside the driving rotor 4 in order to reduce the volume and length of the compressor, thereby forming a shaftless self-driving structure between the motor and the driving rotor 4.

The shaftless self-driving referred to herein refers to that there is no shaft connection structure between the motor and the driving rotor 4, but the motor and the driving rotor 4 are integrally provided, so that the driving rotor 4 follows rotation together when the motor rotates, thereby realizing self-driving, as shown in fig. 2.

By adopting the structure that the motor and the driving rotor 4 are integrated together, the size of the compressor is greatly reduced, the overall size is less than 50% of that of a conventional compressor, and meanwhile, the motor has mechanical operation stability equivalent to that of the driving rotor 4 of the compressor. The driving rotor of the compressor, namely the shaftless self-driving structure of the motor, the output power of the motor is completely transferred to the compression work of the compressor, and the mechanical efficiency is improved to the theoretical limit.

In an alternative embodiment of the utility model, the motor comprises a motor rotor 3 and a motor stator 1, wherein the motor rotor 3 is embedded in the cavity of the driving rotor 4, and the motor stator 1 is penetrated in the cavity of the motor rotor 3.

It should be noted that, the connection relationship between the motor rotor 3 and the driving rotor 4 may be a tight fit relationship, a screw fastening relationship, or a welding relationship, so long as the fixed connection between the motor rotor 3 and the driving rotor 4 can be achieved, the driving rotor 4 can be driven to rotate along with the rotation of the motor rotor 3, and the connection structure is not particularly limited herein.

In some embodiments, a multi-point support structure is provided between the motor rotor 3 and the motor stator 1. According to the compressor rotor structure provided by the utility model, the motor and the compressor driving rotor 4 are integrally supported, so that the cantilever structure is eliminated, and the operation reliability of the machine is improved.

In some embodiments, the motor rotor 3 is rotatably connected at both ends to the motor stator 1 by bearings 5 and bearing blocks 6.

In some embodiments, the motor stator 1 has extension bars at both ends, and the bearings 5 and bearing blocks 6 are disposed at the extension bars.

In a second aspect, the present utility model provides a compressor comprising a housing 2 and a compressor rotor structure disposed within the housing 2.

In some embodiments, the motor stator 1 in the compressor rotor structure is fixed at both ends to the housing 2.

In some embodiments, the compressor described above is a semi-hermetic screw compressor.

When in use, as shown in fig. 2, the motor comprises a motor stator 1 and a motor rotor 3, wherein the motor rotor 3 (when seen from the motion state of parts relative to the compressor shell 2, the outer ring of the motor is rotated, so the outer ring is defined as a motor rotor, the definition of the motor rotor is consistent with that of the motor rotor) is embedded into a cavity of the driving rotor 4, and then a bearing seat 6 is installed to form a section of bearing support structure; the motor stator 1 is fixed to the housing 2 by means of the two end extension portions (extension bars) of the motor stator itself. Finally, the driving rotor 4, the motor rotor 3, and the bearing housing 6 are formed as one member, and are rotated relative to the housing 2 and the motor stator 1 in a two-point support state of the bearings 5 at both ends, thereby completing the mechanical rotation operation of the compressor.

The utility model provides an integrated arrangement scheme of a motor and an active rotor of a screw compressor, wherein the lengths of the motor rotor and the active rotor of the compressor are combined, the overall size of the compressor is greatly reduced, meanwhile, the integrated motor rotor is the active rotor of the compressor, and the output power of the motor is completely transferred to the compression work of the compressor, so that the theoretical 100% mechanical efficiency is realized; the cantilever structure of the motor rotor of the conventional semi-closed compressor is eliminated, namely the vibration problem caused by flexible movement is eliminated, and the compressor runs more stably.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (8)

1. A compressor rotor structure comprising a drive rotor and a motor integrated within the drive rotor to form a shaftless self-driven structure between the motor and the drive rotor.

2. The compressor rotor structure of claim 1, wherein the motor includes a motor rotor and a motor stator, the motor rotor being embedded in the active rotor cavity, the motor stator being disposed through the motor rotor cavity.

3. The compressor rotor structure of claim 2, wherein a multi-point support structure is between the motor rotor and the motor stator.

4. A compressor rotor structure according to claim 2 or 3, wherein both ends of the motor rotor are rotatably connected to the motor stator through bearings and bearing blocks.

5. The compressor rotor structure of claim 4, wherein the motor stator has extension bars at both ends, and the bearing housing are disposed at the extension bars.

6. A compressor comprising a housing and a compressor rotor structure according to any one of claims 1-5 disposed within the housing.

7. The compressor of claim 6, wherein both ends of a motor stator in the compressor rotor structure are fixed to the housing.

8. The compressor of claim 6, wherein the compressor is a semi-hermetic screw compressor.

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