CN209692493U - A motor structure - Google Patents

Abstract

The utility model discloses a motor structure, which comprises a rotating shaft, a cylinder casing, a front end cover, a rear end cover, a stator module and a cast aluminum rotor module, wherein the front end cover and the rear end cover are respectively arranged at the two ends of the cylinder casing, a cavity is formed in the middle of the cylinder casing, the cast aluminum rotor module comprises a rotor core, an upper end aluminum ring, a lower end aluminum ring and a conductive aluminum strip, the side wall of the cylinder casing is sealed, so that external cold air cannot pass through the cylinder casing to enter the cavity, the rear end cover is sealed, so that external cold air cannot pass through the rear end cover to enter the cavity, a plurality of ventilation holes are arranged on the front end cover, an axial ventilation air duct is arranged on the rotor core, the upper end aluminum ring axially upwards extends out M pieces of upper air vanes, the lower end aluminum ring axially downwards extends out N pieces of lower air vanes, M and N are integers, and M is more than N, the pressure difference at the, make the inside air of motor flow from the ventilation hole of front end housing and carry out effective radiating effect, simple structure.

Description

A motor structure

Technical field:

The utility model relates to a motor structure.

Background technique:

The existing motor includes a cast aluminum rotor, the cast aluminum rotor includes a rotor iron core, an end ring and a conductive strip, a shaft hole is opened in the middle of the rotor iron core, and the end rings are installed at both ends of the rotor iron core. There are a number of ventilation holes, and the conductive strips pass through the rotor core to electrically connect the end rings at both ends of the rotor core. In order to dissipate heat inside the motor, the number of them is equal and evenly distributed on the end faces of the cast aluminum rotor end rings. During the rotation process, the rotor drives the wind blades to run synchronously to stir the hot air inside the motor, so that the heat can be circulated and dissipated, so as to achieve the purpose of reducing the temperature inside the motor.

However, this design has limitations. For motor structures and heat dissipation systems of different structures, the effect of heat dissipation is quite different. For example, the motor includes a front cover, a casing and a rear end cover. At both ends, there are several through holes on the front end cover, and the rear end cover is a sealed end cover. When the rotor rotates, the pressure at the ventilation holes on both sides of the rotor is equal, and the upper and lower pressures in the ventilation holes are equal. There is no differential pressure, resulting in no air at both ends. Convection will occur and the heat cannot be effectively dissipated.

Utility model content:

The purpose of this utility model is to provide a motor structure to solve the problem that when the rotor rotates under the specific situation in the prior art that the rear end cover and the cylindrical casing are both sealed, the pressure at the ventilation holes on both sides of the rotor is equal, and the upper and lower pressures in the ventilation holes are equal. , there is no differential pressure, resulting in no convection of the air at both ends, and the technical problem of ineffective heat dissipation.

The purpose of this utility model is achieved through the following technical solutions.

The purpose of this utility model is to provide a motor structure, which includes a rotating shaft, a cylindrical casing, a front end cover, a rear end cover, a stator assembly and a cast aluminum rotor assembly. The cast aluminum rotor assembly is installed on the rotating shaft, and there is a The first bearing seat, the first bearing is installed in the first bearing seat, the second bearing seat protrudes from the middle of the rear end cover, the second bearing seat is installed in the second bearing seat, the front end cover and the rear end cover are respectively installed at both ends of the cylindrical casing The end cover forms a cavity in the middle, the stator assembly and the cast aluminum rotor assembly are installed in the cavity, the outside of the stator assembly is covered with a cylindrical casing, the outside of the cast aluminum rotor assembly is covered with a stator assembly, and the shaft support is installed on On the first bearing and the second bearing, the cast aluminum rotor assembly includes a rotor core, an upper aluminum ring, a lower aluminum ring, and a conductive aluminum strip. The upper aluminum ring and the lower aluminum ring are mounted on the upper and lower surfaces of the rotor core respectively On the end face, the conductive aluminum strip passes through the rotor core to electrically connect the upper aluminum ring and the lower aluminum ring. It is characterized in that: the side wall of the cylindrical casing is sealed, the rear end cover is sealed, and several ventilation holes are set on the front cover. The rotor core is provided with an axial ventilation duct, the upper aluminum ring extends axially upwards from M pieces of upwind blades, and the lower end aluminum ring axially extends downwards from N pieces of downwind blades, M and N are both Integer, and M>N.

The aluminum ring at the upper end protrudes axially upwards and the M pieces of upwind blades are evenly distributed along the circumference.

The aluminum ring at the lower end protrudes axially downwards and N pieces of leeward blades are unevenly distributed along the circumference.

The leeward blades are divided into several groups, each group has at least 2 leeward blades, and each group of leeward blades is evenly distributed along the circumference.

The M pieces of upwind blades and the N pieces of downwind blades are staggered by a certain angle in the circumferential direction.

M>1.5N.

Eight upwind blades protrude axially upward from the upper aluminum ring, and four downwind blades protrude axially downward from the lower aluminum ring.

The 4 downwind blades are distributed symmetrically in a group of 2.

The front end cover is centered on the first bearing seat, and a plurality of annular connecting ribs and a plurality of radial connecting ribs are arranged radially from the inside to the outside, and the annular connecting ribs and the radial connecting ribs cross each other to form ventilation holes.

A plurality of mounting feet protrude from the bottom surface of the rear end cover, and the mounting feet are evenly distributed in the circumferential direction.

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

1) The motor of the present utility model includes a rotating shaft, a cylindrical casing, a front end cover, a rear end cover, a stator assembly and a cast aluminum rotor assembly. The side wall of the cylindrical casing is sealed, the rear end cover is sealed, and the front end cover A number of ventilation holes are arranged on the rotor core, and an axial ventilation duct is arranged on the rotor core. The upper aluminum ring extends axially upwards from M pieces of upwind blades, and the lower end of the aluminum ring axially extends downwards from N pieces of downwind blades. Both M and N are integers, and M>N, changing the pressure difference at the ventilation channels on the upper and lower sides of the rotor to generate air circulation inside the motor, so that the air inside the motor flows out from the ventilation holes of the front cover for effective heat dissipation, and the structure is simple ;

2) Other advantages are described in detail in specific embodiments.

Description of drawings:

Fig. 1 is the perspective view of the utility model motor;

Fig. 2 is another perspective view of the utility model motor;

Fig. 3 is the top view of the utility model motor;

Fig. 4 is the sectional view of A-A among Fig. 3;

Fig. 5 is a perspective view of the utility model cast aluminum rotor;

Fig. 6 is another perspective view of the cast aluminum rotor of the present invention;

Fig. 7 is a bottom view of the cast aluminum rotor of the present invention;

Fig. 8 is a top view of the utility model cast aluminum rotor;

Fig. 9 is a schematic diagram of the air flow inside the motor of the present invention.

Detailed ways:

The utility model will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

Embodiment one:

As shown in Figures 1 to 9, this embodiment provides a motor structure, including a rotating shaft 1, a cylindrical casing 2, a front end cover 3, a rear end cover 4, a stator assembly 5, and a cast aluminum rotor assembly 6. The aluminum rotor assembly 6 is installed on the rotating shaft 1, a first bearing seat 31 protrudes from the middle of the front end cover 3, and a first bearing is installed inside the first bearing seat 31, and a second bearing seat 41 protrudes from the middle of the rear end cover 4. The second bearing is installed in the bearing seat 41, the front end cover 3 and the rear end cover 4 are respectively installed at the two ends of the cylindrical casing 2 and a cavity 20 is formed in the middle, and the stator assembly 5 and the cast aluminum rotor assembly 6 are installed in the hollow space. Inside the cavity 20, the outer surface of the stator assembly 5 is covered with a cylindrical casing 2, the outer surface of the cast aluminum rotor assembly 6 is covered with the stator assembly 5, and the rotating shaft 1 is supported and installed on the first bearing and the second bearing. The cast aluminum rotor assembly 6 includes the rotor core 61, the upper aluminum ring 62, the lower aluminum ring 63, and the conductive aluminum strip. The rotor core 61 electrically connects the upper aluminum ring 62 and the lower aluminum ring 63. It is characterized in that: the side wall of the cylindrical casing 2 is sealed so that the external cold air cannot pass through the cylindrical casing 2 and enter the cavity 20. The end cover 4 is sealed so that external cold air cannot pass through the rear end cover 4 and enter the cavity 20. Several ventilation holes 30 are arranged on the front end cover 3, and an axial ventilation duct 613 is arranged on the rotor core 61. The upper aluminum ring 62 protrudes M pieces of upwind blades 621 axially upwards, and the lower aluminum ring 63 extends axially downwards N pieces of downwind blades 631, M and N are both integers, and M>N, change the ventilation channels on the upper and lower sides of the rotor The pressure difference at the place makes the air flow inside the motor, so that the air inside the motor flows out from the ventilation hole of the front cover for effective heat dissipation, and the structure is simple.

The above-mentioned upper aluminum ring 62 protrudes axially upwards and M pieces of upwind blades 621 are evenly distributed along the circumference, with simple structure and reasonable layout.

The above-mentioned lower aluminum ring 63 protrudes axially downwards and N pieces of downwind blades 631 are unevenly distributed along the circumference, which can change the pressure of the air duct, realize air circulation inside the motor, and effectively dissipate heat.

The leeward blades 631 mentioned above are divided into several groups, each group has at least 2 leeward blades 631, and each group of leeward blades 631 is evenly distributed along the circumference.

The aforementioned M pieces of upwind blades 621 and N pieces of downwind blades 631 are staggered by a certain angle in the circumferential direction, which can change the pressure difference.

The M>1.5N mentioned above.

The above-mentioned upper aluminum ring 62 axially protrudes eight upwind vanes 621 upward, and the lower aluminum ring 63 axially protrudes four downwind vanes 631 downward, which can effectively change the pressure difference between the upper and lower sides and facilitate air flow. Speed up heat dissipation.

The four leeward blades 631 described above are symmetrically distributed around the circumference of a group consisting of two.

The front end cover 3 is centered on the first bearing seat 31, and a plurality of annular connecting ribs 32 and a plurality of radial connecting ribs 33 are arranged radially from the inside to the outside, and the annular connecting ribs 32 and the radial connecting ribs 33 intersect each other to form ventilation holes 30 , with good cooling effect and simple structure.

A plurality of installation feet 42 protrude from the bottom surface of the above-mentioned rear end cover 4, and the installation feet 42 are evenly distributed in the circumferential direction, which is convenient for the motor to be installed on the load.

As shown in Figure 9, through the simulation of the pressure simulation software, the rotor core 61 is provided with an axial ventilation duct 613, and the pressure difference at the axial ventilation duct 613 on both sides is obvious, and the pressure at the place without fan blades is relatively large; There is an obvious pressure difference between the vane 621 and the downwind vane 631 , so that air circulation will be generated inside the motor, and heat dissipation will be effectively performed through the opening of the front end cover.

The motor structure of the utility model is compared with the traditional motor whose windward blades and downwind blades are equal to the load temperature rise. The temperature rise can be reduced by 6K-8K, as shown in Table 1. The heat dissipation effect of the utility model is obvious, and it can be used in It can be popularized on motors with similar structures, and at the same time, according to the idea of this scheme, further optimized design can be carried out to maximize benefits.

Table 1

The above embodiment is a preferred embodiment of the present utility model, but the embodiment of the present utility model is not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present utility model are all All equivalent replacement methods are included in the protection scope of the present utility model.

Claims (10)

1. A motor structure, including a rotating shaft (1), a cylindrical casing (2), a front end cover (3), a rear end cover (4), a stator assembly (5) and a cast aluminum rotor assembly (6), cast aluminum The rotor assembly (6) is installed on the rotating shaft (1), the first bearing seat (31) protrudes from the middle of the front end cover (3), and the first bearing is installed inside the first bearing seat (31), and the middle of the rear end cover (4) The second bearing seat (41) protrudes, and the second bearing is installed in the second bearing seat (41). The two ends of the cylindrical casing (2) are respectively equipped with a front end cover (3) and a rear end cover (4) and A cavity (20) is formed in the middle, and the stator assembly (5) and the cast aluminum rotor assembly (6) are installed in the cavity (20), and the outer surface of the stator assembly (5) is covered with a cylindrical casing (2), The cast aluminum rotor assembly (6) is covered with a stator assembly (5), and the rotating shaft (1) is supported and installed on the first bearing and the second bearing. The cast aluminum rotor assembly (6) includes a rotor core (61), an upper end The aluminum ring (62), the lower aluminum ring (63), the conductive aluminum strip, the upper aluminum ring (62), and the lower aluminum ring (63) are mounted on the upper end surface (611) and the lower end surface (612) of the rotor core (61) respectively. ), the conductive aluminum strip passes through the rotor core (61) to electrically connect the upper aluminum ring (62) and the lower aluminum ring (63), which is characterized in that: the side wall of the cylindrical casing (2) is sealed, and the rear end The cover (4) is sealed, several ventilation holes (30) are set on the front end cover (3), the axial ventilation duct (613) is set on the rotor core (61), and the upper aluminum ring (62) is axially M pieces of upwind blades (621) protrude upwards, and the lower aluminum ring (63) extends axially downwards of N pieces of downwind blades (631), M and N are both integers, and M>N. 2. A kind of motor structure according to claim 1, characterized in that: the upper aluminum ring (62) extends axially upwards and the M blades (621) are evenly distributed along the circumference. 3. A motor structure according to claim 2, characterized in that: the aluminum ring (63) at the lower end extends axially downwards and N pieces of leeward blades (631) are unevenly distributed along the circumference. 4. A motor structure according to claim 3, characterized in that: several leeward blades (631) are divided into several groups, each group has at least 2 leeward blades (631), each group of leeward blades (631) along the circumference Evenly distributed. 5. A motor structure according to claim 1 or 2 or 3 or 4, characterized in that: M pieces of upwind blades (621) and N pieces of downwind blades (631) are staggered by a certain angle in the circumferential direction. 6. A motor structure according to claim 1 or 2 or 3 or 4, characterized in that: M>1.5N. 7. A motor structure according to claim 6, characterized in that: the upper aluminum ring (62) axially protrudes eight upwind blades (621), and the lower aluminum ring (63) axially downwards Stretch out 4 downwind blades (631). 8 . The motor structure according to claim 7 , characterized in that: 4 leeward blades ( 631 ) are symmetrically distributed on a circle in groups of 2. 9 . 9. A motor structure according to claim 1 or 2 or 3 or 4, characterized in that: the front end cover (3) is centered on the first bearing seat (31), and radially sets several annular rings from inside to outside The connecting ribs (32) and several radial connecting ribs (33), and the annular connecting ribs (32) and the radial connecting ribs (33) cross each other to form ventilation holes (30). 10. A motor structure according to claim 1 or 2 or 3 or 4, characterized in that: several mounting feet (42) protrude from the bottom surface of the rear end cover (4), and the mounting feet (42) are evenly distributed in the circumferential direction .