CN103219844A - Dry-type single-phase alternating-current (AC) asynchronous motor based on sealing structure and application thereof - Google Patents

Abstract

The invention relates to a dry-type single-phase AC asynchronous motor based on a sealed structure and its application. The motor includes a rotor and a stator installed in a housing. The stator includes a four-claw stator tooth body and a stator yoke. The stator tooth body It is L-shaped, the straight end of the L-shaped stator tooth body passes through the shielding partition and fits the stator yoke, and the hook end of the L-shaped stator tooth body is effectively aligned with the rotor; the shielding partition, The rear end cover of the shell and the stator yoke are connected and sealed to form a stator cavity, and stator windings are wound on the stator teeth, and the stator windings are located in the stator cavity; the stator cavity is filled with compressed air. The invention can be applied to submerged motors. The invention can realize the complete isolation of the stator and the rotor of the motor, and can achieve the purpose of protecting the stator winding only by using the static seal, and has good sealing effect; the motor has good operation safety and few faults.

Description

A dry-type single-phase AC asynchronous motor based on a sealed structure and its application

technical field

The invention relates to the technical field of submersible motors, in particular to a dry-type single-phase AC asynchronous motor based on a sealed structure and its application.

Background technique

Submersible motors are mainly used as the main power equipment for marine activities, and are currently mainly used for electric pumps and oil drilling rigs. In the development of submersible motors, the conductivity and corrosion of seawater have always been one of the focuses. The coil sealing technology of submersible motors is the focus of research in various countries. There are many kinds of existing sealing technologies. Among them, there are four main types used in submersible motors: dry type, shielded type, oil-filled type and water-filled type. The latter two types cannot fundamentally guarantee complete sealing from the principle, while It is difficult for the dry type to meet the requirements for diving depths exceeding 20 meters. Although the existing shielded type can meet the requirements for deep diving, the increase in the thickness of the shielding layer will directly increase the loss of the motor. With the expansion of marine activities, the complexity and diversity of needs put forward higher requirements for the performance of submersible motors. A submersible motor with a new structure is proposed here. Through the new structure, the seawater leakage resistance of the motor can be effectively improved without reducing the performance of the motor.

In the existing motor sealing technology, in order to protect the stator winding, most of them use dynamic sealing technology, which makes the sealing structure more complicated and the sealing effect is not ideal; with the change of external factors such as pressure and temperature, the external moisture, Oil, dust and other debris can easily invade the space where the motor windings are located, causing coil wear, corrosion and aging, and seriously affecting the service life of the motor.

Contents of the invention

The technical problem to be solved by the present invention is to provide a dry-type single-phase AC asynchronous motor based on a sealed structure and its application, so that the stator winding can be protected from aging and damage caused by moisture, oil and dust.

The technical solution adopted by the present invention to solve the technical problem is to provide a dry-type single-phase AC asynchronous motor based on a sealed structure, including a rotor and a stator installed in the casing, and the stator includes a four-claw stator tooth body and a stator The yoke, the stator tooth body is L-shaped, the straight end of the L-shaped stator tooth body passes through the shielding partition and fits the stator yoke, the hook end of the L-shaped stator tooth body is effectively connected to the rotor Alignment; the shielding partition, the rear end cover of the casing and the stator yoke are connected and sealed to form a stator cavity, and stator windings are wound on the stator teeth, and the stator windings are located in the stator cavity; the stator cavity is filled with compression Air.

One end of the rotor is connected to the motor shaft, and the other end passes through the stator cavity and is connected to the rear end cover of the casing through a bearing and a bearing cover.

One end of the rotor is connected to the motor shaft, and the other end is connected to the shielding partition.

A cylinder is arranged on the shielding partition, and the cylinder is connected with the stator yoke and located in the stator cavity.

There is a mounting hole on the shielding partition corresponding to the position of the stator tooth body; the straight end of the stator tooth body passes through the mounting hole to fit with the shielding partition, and is passed through the O-ring and epoxy resin seal.

The stator yoke is integrated with the rear end cover of the housing.

The rear end cover is provided with a filling hole, and the filling hole is provided with a sealing cover, and the sealing cover is sealed by an O-ring and epoxy resin.

The technical solution adopted by the present invention to solve the technical problem is to provide an application of the above-mentioned dry-type single-phase AC asynchronous motor based on a sealed structure in a submersible motor.

Beneficial effect

Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages and positive effects compared with the prior art: the present invention can realize the complete isolation of the stator and the rotor of the motor, and the purpose of protecting the stator winding can be achieved only by using a static seal. It has a good sealing effect; the motor has good operation safety and less faults.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 among the present invention;

Fig. 2 is the structural representation of embodiment 2 among the present invention;

Fig. 3 is the structural representation of stator among the present invention;

Fig. 4 is a schematic structural view of a stator tooth body in the present invention;

Fig. 5 is a schematic diagram of the structure of the stator and the rotor in the present invention after cooperation.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

The embodiment of the present invention relates to a dry-type single-phase AC asynchronous motor based on a sealed structure, as shown in FIG. and the stator yoke 22, the stator tooth body 21 is L-shaped, the straight end 211 of the L-shaped stator tooth body 21 passes through the shielding partition 3 and fits the stator yoke portion 22, and the L-shaped stator tooth body The hook end 212 of 21 is effectively aligned with the rotor 1; the shielding partition 3, the rear end cover 4 of the casing and the stator yoke 22 are connected and sealed to form a stator cavity 8, and the stator teeth 21 are wound with stator windings 213 , the stator winding 213 is located in the stator cavity 8; the stator cavity 8 is filled with compressed air. Wherein, one end of the rotor 1 is connected to the motor shaft 5 , and the other end is connected to the rear end cover 4 of the housing through the bearing 7 and the bearing cover 6 through the stator cavity 8 .

As shown in Figure 3 and Figure 4, the stator 2 of the present invention includes a stator tooth body 21 and a stator yoke 22, the stator tooth body 21 is L-shaped, and the straight end 211 of the L-shaped stator tooth body 21 is very long, and the stator winding 213 is only wound at a distance from the root of the tooth according to electromagnetic design requirements, and the stator winding 213 is located in the sealed stator cavity after installation. Use a piece of material with high resistivity and non-magnetic conductivity to process the shielding partition 3, and open a hole on it corresponding to the position of the stator tooth body 21, assemble it with the stator tooth body 21, and use the O-shaped sealing ring and epoxy resin to Their binding sites are encapsulated. The stator yoke 22 can be integrated with the rear end cover 4 or can be fixed separately. It is necessary to ensure that the tail end of the stator tooth body 21 is completely attached to the stator yoke 22 after assembly. Wherein, the rear end cover 4 is provided with a filling hole, and the filling hole is provided with a sealing cover 41, and the sealing cover 41 is sealed by an O-ring and epoxy resin. The shielding partition 3, the stator tooth body 21, the stator yoke 22 and the rear end cover 4 form the stator cavity, which is sealed by O-ring and epoxy resin, so that the stator cavity is a completely sealed part, so the stator winding part of the motor Completely sealed in the stator cavity.

As shown in Figure 5, the rotor 1 of the present invention fixes the rotor 1 between the protruding parts of the stator 2 (that is, between the hook ends of the L-shaped stator teeth) through bearings, so that the iron core of the rotor 1 and the iron core of the stator 2 are effectively Partially aligned.

After the motor of the present invention is assembled, because the stator winding part is completely closed, there will be no problems such as water, oil, dust and other sundries entering the stator cavity of the motor and causing damage to the coil.

Example 2

The embodiment of the present invention relates to a dry-type single-phase AC asynchronous motor based on a sealed structure. As shown in FIG. 2 , it includes a rotor 1 and a stator 2 installed in the casing. Composed of the stator yoke 22, the stator tooth body 21 is L-shaped, the straight end 211 of the L-shaped stator tooth body 21 passes through the shielding partition 3 and fits the stator yoke 22, and the L-shaped stator tooth The hook end 212 of the body 21 is effectively aligned with the rotor 1; the shielding partition 3, the rear end cover 4 of the casing and the stator yoke 22 are connected and sealed to form a stator cavity 8, and a stator winding is wound on the stator tooth body 21 213, the stator winding 213 is located in the stator cavity 8; the stator cavity 8 is filled with compressed air. Wherein, one end of the rotor 1 is connected to the motor shaft 5 , and the other end is connected to the shielding partition 3 . A cylinder is provided on the shielding partition 3 , and the cylinder is connected to the stator yoke 22 and located in the stator cavity 8 .

As shown in Figure 3 and Figure 4, the stator of the present invention includes a stator tooth body 21 and a stator yoke 22, the stator tooth body 21 is L-shaped, and the straight end of the L-shaped stator tooth body 21 is very long, and the stator winding 213 According to electromagnetic design requirements, the stator winding 213 is wound at a certain distance from the root of the tooth, and the stator winding 213 is located in the sealed stator cavity after installation. Use a piece of material with high resistivity and non-magnetic conductivity to process the shielding partition 3, and open a hole on it corresponding to the position of the stator tooth body 21, assemble it with the stator tooth body 21, and use the O-shaped sealing ring and epoxy resin to Their binding sites are encapsulated. The other side of the shielding partition 3 is made into a cylinder corresponding to the stator cavity to increase the mechanical strength of the stator cavity. The stator yoke 22 can be integrated with the rear end cover 4 or can be fixed separately. It is necessary to ensure that the tail end of the stator tooth body 21 is completely attached to the stator yoke 22 after assembly. Wherein, the rear end cover 4 is provided with a filling hole, and the filling hole is provided with a sealing cover 41, and the sealing cover 41 is sealed by an O-ring and epoxy resin. The shielding partition 3, the stator tooth body 21, the stator yoke 22 and the rear end cover 4 form the stator cavity, which is sealed by O-ring and epoxy resin, so that the stator cavity is a completely sealed part, so the stator winding part of the motor Completely sealed in the stator cavity.

As shown in Figure 5, the rotor 1 of the present invention is fixed between the extended parts of the stator 2 through bearings (that is, between the hook ends of the L-shaped stator teeth), so that the rotor core is aligned with the effective part of the stator core .

After the motor of the present invention is assembled, because the stator winding part is completely closed, there will be no problems such as water, oil, dust and other sundries entering the stator cavity of the motor and causing damage to the coil.

The dry-type single-phase AC asynchronous motor based on the sealing structure of the present invention can be applied to submersible motors.

It is worth mentioning that the motor of the present invention can also be used as a spinning machine motor, a submersible motor and a motor used in various environments.

It is not difficult to find that the present invention can realize the complete isolation of the stator and the rotor of the motor, and the purpose of protecting the stator winding can be achieved only by using the static seal, which has good sealing effect; the motor has good operation safety and few faults. The structure of the invention realizes the separate arrangement of the stator winding and the rotor in the magnetic circuit structure of the motor, and can seal the stator winding at different levels as required.

Claims (8)

1. A dry-type single-phase AC asynchronous motor based on a sealed structure, including a rotor (1) and a stator (2) installed in the casing, and the stator (2) includes a four-claw stator tooth body (21) and a stator The yoke (22), characterized in that the stator tooth body (21) is L-shaped, and the straight end (211) of the L-shaped stator tooth body (21) passes through the shielding partition (3) and the stator yoke part (22), the hook end (212) of the L-shaped stator tooth body (21) is effectively aligned with the rotor (1); the shielding partition (3), the rear end cover (4) of the housing It is connected and sealed with the stator yoke (22) to form a stator cavity (8), the stator tooth body (21) is wound with a stator winding (213), and the stator winding (213) is located in the stator cavity (8); the The stator cavity (8) is filled with compressed air. 2. The dry-type single-phase AC asynchronous motor based on a sealed structure according to claim 1, characterized in that one end of the rotor (1) is connected to the motor shaft (5), and the other end passes through the stator cavity (8 ) is connected with the rear end cover (4) of the casing through the bearing (7) and the bearing cover (6). 3. The dry-type single-phase AC asynchronous motor based on a sealed structure according to claim 1, characterized in that one end of the rotor (1) is connected to the motor shaft (5), and the other end is connected to the shielding partition (3 ) connected. 4. The dry-type single-phase AC asynchronous motor based on a sealed structure according to claim 3, characterized in that a cylinder (31) is provided on the shielding partition (3), and the cylinder (31) and The stator yokes (22) are connected and located in the stator cavity (8). 5. The dry-type single-phase AC asynchronous motor based on a sealed structure according to claim 1, characterized in that there are installation holes on the shielding partition (3) corresponding to the position of the stator tooth body (21); The straight end ( 211 ) of the stator tooth body ( 21 ) passes through the installation hole and fits with the shielding partition ( 3 ), and is sealed by an O-ring and epoxy resin. 6 . The dry-type single-phase AC asynchronous motor based on a sealed structure according to claim 1 , characterized in that, the stator yoke ( 22 ) is integrated with the rear end cover ( 4 ) of the housing. 7 . 7. The dry-type single-phase AC asynchronous motor based on a sealed structure according to claim 1, characterized in that, the rear end cover (4) is provided with a filling hole, and the filling hole has a sealing cover ( 41), the sealing cover (41) is sealed by O-ring and epoxy resin. 8. An application of a dry-type single-phase AC asynchronous motor based on a sealed structure according to any one of claims 1-7 in a submersible motor.

Images