CN210927249U - Motor applied to centrifugal compressor - Google Patents

Abstract

The utility model discloses a motor applied to a centrifugal compressor, comprising a stator, a rotor and a machine base, the machine base is a cylindrical structure with openings at both ends, and a support plate is arranged between the stator and the machine base , between the end of the stator winding and the frame is provided with an annular windshield along the radial direction, the outer circumference of the windshield is fixedly connected with the frame, and the inner circumference of the windshield is connected to the stator winding. Axial flow fans are arranged on the rotating shafts at both ends of the rotor, corresponding air inlets and air outlets are arranged on the machine base, and a support block is arranged at the bottom of the machine base. In order to adapt to the cylindrical structure of the stator iron core, the motor is more compact, the overall size is small, the accessories are few, and the weight is light. By arranging an axial flow fan on the rotating shaft, and between the two ends of the stator and the frame, there are The wind deflectors along the radial direction make the wind only pass through the parts that need heat dissipation, optimize the air path structure, and ensure the heat dissipation effect.

Description

A motor for centrifugal compressor

technical field

The utility model relates to the field of motors, in particular to a motor for centrifugal compressors.

Background technique

Centrifugal compressors are the main development direction of the compressor industry at present. Compared with reciprocating compressors, centrifugal compressors have compact structure, small size, light weight, continuous and uniform exhaust, no need for intermediate tanks and other devices, and low vibration. There are few wearing parts, and it is widely used without large and heavy base parts. These characteristics also lead to the requirements for its drive motor to be light in weight, small in size, and low in vibration. Centrifugal compressors are generally installed in compact boxes. Therefore, there are certain requirements for the heat dissipation performance of the motor.

The motor consists of a stator part and a rotor part. At present, the drive motor frame used for centrifugal compressors adopts a square structure. The heat dissipation of the motor is carried out through the air circulation between the cooler set above the frame and the inside of the frame. The installation and connection method of the motor is flange connection installation, and the bottom is connected to the installation foundation through a square foot plate and four feet. However, this kind of motor has the following problems: there are many accessories, large size and weight, and the heat dissipation air path is complicated, circulation Cooling is slow.

SUMMARY OF THE INVENTION

In order to solve the above problems, the utility model provides a motor for centrifugal compressor, which has simple structure, few accessories, light weight, small size, high space utilization rate, simple air path and fast heat dissipation.

The technical scheme adopted by the utility model is:

A motor for a centrifugal compressor includes a stator, a rotor and a frame, the stator is fixedly arranged inside the frame, the rotor is arranged in the stator, and the stator includes a stator iron core and a stator iron wound around the stator. The stator winding on the core, the two ends of the base are provided with end caps, the base is a cylindrical structure with two ends open, an annular support plate is arranged between the stator and the base, and the stator is connected to the base. The inner circumference of the annular support plate is fixedly connected, the frame is fixedly connected to the outer circumference of the annular support plate, and a radially annular wind baffle is arranged between the end of the stator winding and the frame. The outer circumference of the plate is fixedly connected with the base, the inner circumference of the windshield is non-contacting with the stator winding, and the shafts at both ends of the rotor are provided with axial flow fans, which are connected to the axial flow fan on the base. An air inlet is provided at a position corresponding to the fan, an air outlet is provided at a position corresponding to the stator iron core, and a support block is provided at the bottom of the machine base.

Preferably, in order to ensure the supporting effect, there are two support plates, which are respectively arranged at both ends of the stator iron core.

Specifically, an end plate is provided between the base and the end cover, the base and the end plate are welded, and the end cover and the end plate are fixedly connected by bolts.

In order to make the air flow more smoothly and ensure the heat dissipation performance, there are four air inlets, and each axial flow fan corresponds to two air inlets respectively.

Preferably, in order to ensure the rigidity of the machine base, the machine base adopts a steel plate with a thickness of 20 mm.

The beneficial effects of the present utility model:

The utility model makes the structure more compact by setting the frame structure as a cylindrical structure adapted to the stator iron core, avoiding the waste of space, and also reducing the waste of materials. The installation foundations are in line contact, and only one support block is arranged at the bottom to ensure reliable installation, and because the support block is small in size, it is convenient for users to install the shock absorbing device. In addition, an axial flow fan is arranged on the rotating shaft, an air inlet is arranged on the frame corresponding to the axial flow fan, and an air outlet is arranged at a position corresponding to the stator iron core, and is arranged between the end of the stator winding and the frame. There are windshields along the radial direction, that is to say, the heat dissipation mechanism is arranged inside the base, which effectively utilizes the internal space and reduces the size of the motor, so that most of the wind only passes through the parts that need heat dissipation, and the air path structure is optimized. The utility model has the advantages of few integral structural parts, light weight, small size and easy installation.

Description of drawings

Fig. 1 is the structural representation of the utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 .

Detailed ways

In order to facilitate the understanding of the present utility model, the technical solutions of the present utility model are described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in FIG. 1, a motor for centrifugal compressor includes a stator, a rotor and a frame 1, the stator and the rotor are both arranged inside the frame, the stator is fixedly connected with the frame, and the The rotor is arranged in the stator, the stator includes a stator iron core and a stator winding 3 wound on the stator iron core, and the machine base 1 is a cylindrical structure with openings at both ends, and is specifically made of 20mm thick steel plate rolled. Therefore, setting the machine base 1 into a cylindrical structure matching the stator iron core 2 can more conveniently connect the machine base 1 and the stator iron core 2 fixedly, save materials, reduce the waste of space, and improve the space utilization rate.

An annular support plate 5 is arranged between the stator and the base 1, and the stator is fixedly connected to the interior of the base 1 through the annular support plate 5. Preferably, there are two support plates 5, which are respectively arranged near the stator. At the positions of both ends of the iron core 2, two support plates 5 are provided for better fixed support. The inner circumference of the support plate 5 is welded to the stator core 2, and the outer circumference of the support plate 5 is welded to the machine base 1. . In order to prevent the wind from entering the outer ring of the stator winding 3 and affecting the heat dissipation, a radially annular wind baffle 4 is arranged between the end of the stator winding 3 and the machine base 1 . As shown in FIG. 2 , the wind baffle 4 The outer circumference of the windshield is fixedly connected to the base 1, specifically by welding, and the inner circumference of the windshield 4 is set in non-contact with the stator winding 3. It should be noted here that the coil winding method of the existing motor determines the radial direction. There is no ventilation, because the stator winding 3 is not an improvement point of the present invention, and the accompanying drawing only schematically shows the stator winding 3 . By arranging the machine base 1 in a cylindrical shape that matches the stator core 2, space can be reduced and materials can be saved. Correspondingly, both the support plate 5 and the wind deflector 4 are arranged in a ring shape, which can further save materials. .

The shafts 12 at both ends of the rotor are provided with an axial flow fan 8 , an air inlet 10 is opened on the base 1 at a position corresponding to the axial flow fan 8 , and an air outlet 11 is opened at a position corresponding to the stator core 2 . To make the air flow more smoothly and ensure the heat dissipation performance, there are four air inlets 10 , each axial fan 8 corresponds to two air inlets 10 respectively, and two air outlets 11 are arranged. When the motor is working, the shaft 12 rotates to drive the axial flow fan 8 to work, and the air enters the inside of the frame 1 through the air inlet 10. Due to the setting of the windshield 4, the air enters the stator winding 3 through the gap between the stator winding 3 and the frame 1. There is very little air in the periphery, and most of the air can only flow to the middle of the base 1 along the rotating shaft 12, and then pass through the rotor radial cooling air duct, through the stator radial air duct, and finally come out from the air outlet 11, as indicated by the arrow in Figure 1. The direction is the direction of the air path. The utility model optimizes the structure of the air path by arranging the fan inside the base 1 and disposing the air baffle 4, so that the wind circulates in the parts that need heat dissipation, and the heat dissipation effect is ensured.

Both ends of the base 1 are provided with end caps 6 , an end plate 7 is arranged between the base 1 and the end cap 6 , the base 1 and the end plate 7 are welded, and the end cap 6 and the end plate are welded. 7 are connected by bolts. The end cover 6 at one end of the motor connected to the centrifugal compressor is a flange end cover. The motor is butt-installed with the flange structure at the interface of the centrifugal compressor through the flange structure on the flange end cover. The bottom of the machine base 1 is connected to the installation foundation through a small support block 9. Since the motor has a cylindrical structure and is in line contact with the installation foundation, installing a support block 9 at the center of gravity of the motor at the bottom of the motor can meet the requirements of the motor. The previously used foundation plate and four fixed feet have fewer components and lighter weight, and the support block 9 is smaller in size, making it easier to install the shock absorber.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the present invention, and the present invention is not departing from the spirit and scope of the present invention. There will also be various changes and improvements that fall within the scope of the claimed utility model. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. The utility model provides a be applied to centrifugal compressor's motor, includes stator, rotor and frame, the fixed inside that sets up at the frame of stator, the rotor sets up in the stator, the stator includes stator core and the stator winding of winding on stator core, the both ends of frame are provided with end cover, its characterized in that: the motor base is of a cylindrical structure with openings at two ends, an annular support plate is arranged between the stator and the motor base, the stator is fixedly connected with the inner circumference of the annular support plate, the motor base is fixedly connected with the outer circumference of the annular support plate, a radial annular wind shield is arranged between the end part of the stator winding and the motor base, the outer circumference of the wind shield is fixedly connected with the motor base, the inner circumference of the wind shield and the stator winding are arranged in a non-contact mode, axial flow fans are arranged on rotating shafts at two ends of the rotor, an air inlet is formed in the position, corresponding to the axial flow fans, of the motor base, an air outlet is formed in the position, corresponding to.

2. The electric motor applied to a centrifugal compressor according to claim 1, wherein: the two support plates are respectively arranged at two ends of the stator core.

3. The electric motor applied to a centrifugal compressor according to claim 1, wherein: the motor is characterized in that an end plate is arranged between the motor base and the end cover, the motor base is welded with the end plate, and the end cover is fixedly connected with the end plate through a bolt.

4. The electric motor applied to a centrifugal compressor according to claim 1, wherein: the air inlets are four, and each axial flow fan corresponds to two air inlets respectively.

5. The electric motor applied to a centrifugal compressor according to claim 1, wherein: the engine base is made of a steel plate with the thickness of 20 mm.

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