A water-air cooled permanent magnet direct drive motor structure

Abstract

The invention relates to a water-air cooled permanent magnet direct drive motor structure, comprising a machine base and a machine base cylinder, a stator core component and a rotor core component arranged in an inner cavity of the machine base cylinder, the stator core component being fixedly arranged on the machine base through the machine base cylinder, the stator core component comprising a number of stator punching sheets, a plurality of stator punching sheets being stacked in sections along the axial direction to form a stator core assembly block, a plurality of groups of stator core assembly blocks being evenly arranged in a circumferential annular array from front to back in the inner cavity of the machine base cylinder, the plurality of groups of stator core assembly blocks being combined to form a stator core of the stator core component; the rotor core component comprising a plurality of permanent magnets and a rotor core, the permanent magnets and the rotor core being fixedly mounted on a rotor bracket by bolts, the rotor core component and the stator core component cooperating with each other, the technical solution of the application can cool the rotor and the stator of the motor at the same time, thereby improving the reliability and stability of the motor when in use.

Description

Technical Field

[0001] The invention relates to a permanent magnet direct drive motor structure, and in particular to a permanent magnet direct drive motor structure with a water-air cooling function. Background Art

[0002] Permanent magnet direct drive motor is a high-efficiency, low-noise, and highly reliable motor, which is widely used in various electric devices. In permanent magnet direct drive motor, permanent magnets are directly used in the rotor, eliminating the energy loss and noise caused by gear transmission in traditional motors, while having high efficiency and high dynamic response characteristics; therefore, it is widely used in various fields, such as automobiles, robots, medical equipment, printing machinery, high-speed trains, etc. It has the advantages of self-starting, low vibration, low noise, high precision, and easy control, and has broad application prospects in the fields of machinery manufacturing, automation control, and new energy.

[0003] Permanent magnet direct-drive motors can directly meet the requirements of load speed and torque, eliminating the reduction box and buffer mechanism in the transmission system. They can fundamentally overcome the various drawbacks of the traditional motor plus gear reducer system, and have the advantages of high transmission efficiency, good starting torque performance, high reliability, and low maintenance costs.

[0004] Considering the characteristics of low speed and large size of permanent magnet direct drive motors, motor cooling mostly adopts casing water cooling, that is, a water channel is set on the outside of the casing to transfer the heat of the motor to the outside through water circulation. The casing is difficult to process, has strict sealing requirements, and has high production costs. Because the water channel is close to the outer circle of the stator core, this cooling method can play a role in cooling the stator, but the biggest drawback of this structure is that it is difficult to effectively cool the permanent magnet motor rotor. The rotor cooling can only rely on natural heat dissipation, and the cooling efficiency is low. During use, when the rotor temperature rises, the permanent magnet on the rotor is easy to lose magnetism, which not only affects the use effect, but also causes damage to the entire motor, requiring replacement of parts, which is labor-intensive and time-consuming, increasing the cost and burden of the enterprise. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a water-air cooled permanent magnet direct drive motor structure, comprising a machine base and a machine base cylinder, wherein a stator core component and a rotor core component are arranged in an inner cavity of the machine base cylinder, and the stator core component is fixedly arranged on the machine base through the machine base cylinder.

[0006] The stator core component includes a number of stator punching sheets, and a plurality of stator punching sheets are stacked in sections along the axial direction to form a stator core assembly block. A plurality of groups of stator core assembly blocks are evenly arranged in a circumferential annular array from front to back in the inner cavity of the base cylinder. The plurality of groups of stator core assembly blocks are combined to form a stator core of the stator core component;

[0007] The rotor core component includes a plurality of permanent magnets and a rotor core, the permanent magnets and the rotor core are fixedly mounted on the rotor bracket by bolts, and the rotor core component cooperates with the stator core component;

[0008] The inner cylinder wall of the base cylinder is evenly provided with a plurality of stator core assembly tables for mounting stator core assembly blocks along the circumferential direction. All stator core assembly blocks are fixedly arranged in the inner cavity of the base cylinder through the stator core assembly tables, that is, the stator core is fixedly arranged in the inner cavity of the base cylinder through the stator core assembly tables;

[0009] The body of the base cylinder is provided with a surface ventilation hole group at each stator core assembly platform, and there is a gap between each stator core assembly block and the inner cylinder wall of the base cylinder, that is, an air outlet is formed between each stator core assembly block and the stator core assembly platform matched therewith, and an air inlet is formed between each stator core assembly block and the inner cylinder wall of the base cylinder, and the air outlet and the air inlet are arranged adjacent to each other, and there is a gap between two stator core assembly blocks adjacent to each other in the axial direction of the inner cylinder of the base cylinder, that is, a radial ventilation channel of the iron core is formed between two stator core assembly blocks adjacent to each other in the axial direction, and there is a gap between the stator core component and the rotor core component, that is, a stator-rotor air gap is formed between the stator core component and the rotor core component, and the body of the base cylinder is provided with at least one air inlet;

[0010] The air inlet, the iron core radial ventilation duct, the stator-rotor air gap and the air inlet duct constitute an air inlet path, the stator-rotor air gap, the iron core radial ventilation duct, the surface ventilation through hole group and the air outlet duct constitute an air outlet path, and the air inlet path and the air outlet path are circulated and connected through a water-to-air radiator and a cooling fan.

[0011] Preferably, the cooling fan is connected to the air inlet, the surface ventilation hole group is connected to the water-to-air radiator, and the water-to-air radiator and the cooling fan are connected through a ventilation duct, that is, the cooling air passes through the air inlet and the iron core radial ventilation duct in turn to reach the stator and rotor air gap for cooling, and the heated cooling air passes through the stator and rotor air gap and the iron core radial ventilation duct in turn to reach the surface ventilation hole group, and circulation cooling is achieved through the water-to-air radiator and the cooling fan.

[0012] Preferably, the stator core assembly platform is composed of four isolation ribs, the four isolation ribs constitute an air outlet cavity, and the surface ventilation through hole group is located in the air outlet cavity.

[0013] Preferably, an assembly hole is opened on the isolation rib, and the dovetail rib is fixedly mounted on the isolation rib by the cooperation of bolts and the assembly hole. Two first dovetail grooves are opened at the lower end of each stator punching sheet. Through the tight cooperation between the first dovetail grooves and the dovetail rib, the stator punching sheet is fixedly arranged on the stator core assembly platform, and the two ends of each stator punching sheet are respectively fixedly arranged on two adjacent stator core assembly platforms through the first dovetail grooves.

[0014] Preferably, a plurality of ring plates are fixedly installed on the outer circumference of the base cylinder, the skin is fixedly installed on the outer circumference of the base cylinder through the ring plates, and the skin is covered on the outer circumference of the surface ventilation through hole group, and the surface ventilation through hole group is connected with the water-to-air radiator through the cavity between the skin and the base cylinder.

[0015] Preferably, a gap is formed between two stator core assembly blocks adjacent to each other in the axial direction of the inner cylinder of the machine base cylinder through a spacing member, and each spacing member includes a ventilation slot plate and a plurality of ventilation slot sheets, and the cross-sectional contour of the ventilation slot plate is the same in size and structure as the cross-sectional contour of the stator core, that is, the cross-sectional contour of the ventilation slot plate coincides with the cross-sectional contour of the stator core assembly block, and the outer periphery of the ventilation slot plate is uniformly provided with a plurality of second dove tail slots matched with the dove tail ribs along the circumferential direction, and each spacing member is fixed in the inner cavity of the machine base cylinder through the ventilation slot plate, and a plurality of ventilation slot sheets are uniformly fixed on the end face of the disk body of the ventilation slot plate along the circumferential direction, and each spacing member is in contact with two stator core assembly blocks adjacent to each other in the front and rear through the ventilation slot plate and the ventilation slot sheets.

[0016] Preferably, a limit retaining ring is fixedly installed at both ends of the stator core in the inner cavity of the base cylinder, and a plurality of third dove tail grooves matching with the dove tail ribs are evenly opened on the outer circumference of the limit retaining ring along the circumferential direction.

[0017] Preferably, the stator punching sheet is evenly provided with a plurality of embedding strips for embedding the stator coil along the circumferential direction, and the end of the embedding strip of the stator punching sheet is provided with a slot wedge for fixing the stator coil.

[0018] Preferably, the ventilation slot plate and the limit retaining ring are evenly provided with a plurality of embedding strips for embedding the stator coil along the circumferential direction, and the ends of the embedding strips of the ventilation slot plate are provided with slot wedges for fixing the stator coil.

[0019] By means of the above scheme, the present invention has at least the following advantages:

[0020] The technical solution of the present application realizes a series air path through an air outlet duct, an air inlet duct, an iron core radial ventilation duct, and a stator-rotor air gap, so that the cooling air can cool both the stator iron core component and the rotor iron core component at the same time, that is, the cooling air is blown in from one end of the base, enters the stator iron core from the outer circle of the stator iron core along the radial direction from the outside to the inside, and then enters the stator-rotor air gap from the iron core radial ventilation duct. At this time, the cooling air can pass through the rotor surface, and then the cooling air can enter the water-to-air radiator from the iron core radial ventilation duct from the inside to the outside through the surface ventilation through-hole group to achieve heat exchange, and then continue the cooling operation;

[0021] The series air path disclosed in the technical solution of the present application enables the cooling air to pass not only through the stator core, but also through the stator-rotor air gap and the outer peripheral surface of the rotor core, thereby being able to cool both the stator core components and the rotor core components, effectively reducing the temperature rise of the permanent magnets, reducing the risk of permanent magnet demagnetization, improving the reliability of the permanent magnet direct-drive motor during operation, and solving the problem that traditional cooling methods cannot effectively cool the rotor core components.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show a certain embodiment of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of a water-air cooled permanent magnet direct drive motor structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a water-air cooled permanent magnet direct drive motor structure of the present invention;

[0026] Figure 3 It is a schematic structural diagram of a water-air cooled permanent magnet direct drive motor structure of the present invention after removing the skin 19;

[0027] Figure 4 It is a structural schematic diagram of a stator core 5 of a water-air cooled permanent magnet direct drive motor structure of the present invention;

[0028] Figure 5 It is a structural schematic diagram of an air outlet duct A and an air inlet duct B of a water-air cooled permanent magnet direct drive motor structure of the present invention;

[0029] Figure 6 It is a structural schematic diagram of a stator core assembly block 4 of a water-air cooled permanent magnet direct drive motor structure of the present invention;

[0030] Figure 7 It is a structural schematic diagram of a stator punching sheet 3 of a water-air-cooled permanent magnet direct-drive motor structure of the present invention;

[0031] Figure 8 It is a structural schematic diagram of a ventilation slot plate 21 of a water-air-cooled permanent magnet direct-drive motor structure of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of a limit retaining ring 23 of a water-air cooled permanent magnet direct drive motor structure of the present invention;

[0033] Fig.10 It is a schematic diagram of the structural relationship between the core radial ventilation channel C, the stator-rotor air gap D, the surface ventilation through hole group 10 and the air inlet 11 of a water-air-cooled permanent magnet direct-drive motor structure of the present invention;

[0034] Fig.11 It is a schematic diagram of the wind path state when the cooling wind enters the base cylinder 2 for cooling when the water-air cooled permanent magnet direct drive motor structure of the present invention is working;

[0035] Fig.12 It is a schematic diagram of the wind path state of a water-air-cooled permanent magnet direct-drive motor structure of the present invention, in which cooling wind is discharged from the base cylinder 2 for heat exchange when the motor is working;

[0036] Fig.13 It is a schematic diagram of the wind path state when cooling wind enters and is discharged when a water-air cooled permanent magnet direct drive motor structure of the present invention is working;.

[0037] In the figure: base 1, base cylinder 2, stator punching sheet 3, stator core assembly block 4, stator core 5, permanent magnet 6, rotor core 7, rotor bracket 8, stator core assembly platform 9, surface ventilation through hole group 10, air inlet 11, water-to-air radiator 12, cooling fan 13, isolation rib 14, assembly hole 15, dove tail rib 16, first dove tail groove 17, ring plate 18, skin 19, spacer member 20, ventilation slot plate 21, ventilation slot sheet 22, limit retaining ring 23, third dove tail groove 24, embedded strip 25, slot wedge 26, second dove tail groove 27. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] See also Figure 1 to Figure 13 A water-air-cooled permanent magnet direct-drive motor structure according to a preferred embodiment of the present invention comprises a base 1 and a base cylinder 2, a stator core component and a rotor core component are arranged in an inner cavity of the base cylinder 2, and the stator core component is fixedly arranged on the base 1 through the base cylinder 2.

[0040] The stator core component includes a number of stator punching sheets 3, and a plurality of stator punching sheets 3 are stacked in sections along the axial direction to form a stator core assembly block 4. A plurality of groups of stator core assembly blocks 4 are evenly arranged in a circumferential annular array from front to back in the inner cavity of the base cylinder 2. The plurality of groups of stator core assembly blocks 4 are combined to form a stator core 5 of the stator core component.

[0041] The rotor core component includes a plurality of permanent magnets 6 and a rotor core 7. The permanent magnets 6 and the rotor core 7 are fixedly mounted on a rotor bracket 8 by bolts. The rotor core component cooperates with the stator core component.

[0042] The inner cylinder wall of the base cylinder 2 is evenly provided with a plurality of stator core assembly tables 9 for mounting the stator core assembly blocks 4 along the circumferential direction. All stator core assembly blocks 4 are fixedly arranged in the inner cavity of the base cylinder 2 through the stator core assembly tables 9, that is, the stator core 5 is fixedly arranged in the inner cavity of the base cylinder 2 through the stator core assembly tables 9;

[0043] The stator core assembly platform 9 not only facilitates the assembly of the stator core 5, but also serves as a part of the entire series air path to allow the circulated cooling air to be discharged.

[0044] The body of the base cylinder 2 is provided with a surface ventilation hole group 10 at each stator core assembly platform 9, and there is a gap between each stator core assembly block 4 and the inner cylinder wall of the base cylinder 2, that is, an air outlet A is formed between each stator core assembly block 4 and the stator core assembly platform 9 matched therewith, and an air inlet B is formed between each stator core assembly block 4 and the inner cylinder wall of the base cylinder 2, and the air outlet A and the air inlet B are arranged adjacent to each other, and there is a gap between two stator core assembly blocks 4 adjacent to each other in the axial direction of the inner cylinder of the base cylinder 2, that is, a core radial ventilation channel C is formed between two stator core assembly blocks 4 adjacent to each other in the front and back directions, and there is a gap between the stator core component and the rotor core component, that is, a stator-rotor air gap D is formed between the stator core component and the rotor core component, and the body of the base cylinder 2 is provided with at least one air inlet 11;

[0045] Since multiple stator core assembly tables 9 are evenly arranged in the inner cavity of the base cylinder 2 in the circumferential direction, it can be seen from the attached drawings that all the air outlet ducts A and air inlet ducts B along the circumferential direction are arranged at adjacent intervals, which can ensure the rapid circulation of cooling air inlet and outlet, thereby achieving the purpose of series air paths.

[0046] The air inlet 11, the iron core radial ventilation channel C, the stator-rotor air gap D and the air inlet duct B constitute an air inlet path, the stator-rotor air gap D, the iron core radial ventilation channel C, the surface ventilation through hole group 10 and the air outlet duct A constitute an air outlet path, and the air inlet path and the air outlet path are circulated and connected through the water-to-air radiator 12 and the cooling fan 13.

[0047] It is worth mentioning that the air inlet and the air outlet each use an iron core radial ventilation duct C, that is, through two adjacent iron core radial ventilation ducts C, the series connection of the air inlet duct B and the air outlet duct A is realized.

[0048] Preferably, the cooling fan 13 is connected to the air inlet 11, the surface ventilation hole group 10 is connected to the water-to-air radiator 12, and the water-to-air radiator 12 is connected to the cooling fan 13 through a ventilation duct, that is, the cooling air passes through the air inlet 11 and the iron core radial ventilation channel C in turn to reach the stator and rotor air gap D for cooling, and the heated cooling air passes through the stator and rotor air gap D and the iron core radial ventilation channel C in turn to reach the surface ventilation hole group 10, and circulation cooling is achieved through the water-to-air radiator 12 and the cooling fan 13.

[0049] Through the cooling fan 13, the air inlet 11, the surface ventilation hole group 10 and the water-to-air radiator 12, the cooling air can be discharged from the surface ventilation hole group 10 after cooling, and after the cooling of the water-to-air radiator 12, it is driven into the air inlet 11 through the cooling fan 13, thereby truly realizing the closing effect of the series air path, ensuring that the motor can be continuously cooled by the cooling air when in use.

[0050] Preferably, the stator core assembly platform 9 is composed of four isolation ribs 14, the four isolation ribs 14 constitute an air outlet cavity, and the surface ventilation through hole group 10 is located in the air outlet cavity.

[0051] The four isolation ribs 14 form a hollow boss, namely the air outlet cavity mentioned above, and the surface ventilation hole group 10 is located in the air outlet cavity, so that the air outlet duct A and the air inlet duct B can be set at intervals through the stator core assembly table 9, which can ensure normal air outlet and ensure that the two air ducts do not affect each other, thereby ensuring the closure of the series connection.

[0052] Preferably, an assembly hole 15 is opened on the isolation rib 14, and the dove tail rib 16 is fixedly mounted on the isolation rib 14 by the cooperation of bolts with the assembly hole 15. Two first dove tail grooves 17 are opened on the lower end of each stator punching sheet 3. Through the tight cooperation between the first dove tail grooves 17 and the dove tail rib 16, the stator punching sheet 3 is fixedly set on the stator core assembly platform 9, and the two ends of each stator punching sheet 3 are respectively fixedly set on two adjacent stator core assembly platforms 9 through the first dove tail grooves 17.

[0053] The two isolation ribs 14 in the axial direction of the two base cylinders 2 are provided with assembly holes 15. At the same time, as shown in the attached drawings, the two ends of each stator punching sheet 3 are respectively fixedly arranged on an isolation rib 14 respectively provided on two adjacent stator core assembly platforms 9, and the two isolation ribs 14 are arranged adjacent to each other. The advantage of such a structure is that it can ensure that each stator core assembly block 4 is reliably fixed and installed. At the same time, after all stator core assembly blocks 4 are installed in such an arrangement, the core radial ventilation duct C formed by the two adjacent stator core assembly blocks 4 can simultaneously act with the outlet duct A and the inlet duct B:

[0054] The core radial ventilation duct C located at the gap between the stator core assembly block 4 and the inner wall of the base cylinder 2 (i.e., the air inlet duct B) can realize the cooling air entry function. The cooling air can reach the stator-rotor air gap D through the core radial ventilation duct C at the air inlet duct B, thereby achieving the purpose of cooling the rotor.

[0055] The core radial ventilation duct C located above the air outlet cavity of each of the two adjacent stator core assembly platforms 9 can be used for exhausting the cooling air after heating. The core radial ventilation duct C at this location can be connected with the surface ventilation through hole group 10. At the same time, the isolation ribs 14 of the stator core assembly platform 9 are used to achieve a partition effect to avoid mutual interference between the two adjacent core radial ventilation ducts C, thereby ensuring the reliability of air intake and air outlet. The cooling air after heating can reach the core radial ventilation duct C above the surface ventilation through hole group 10 from the stator-rotor air gap D, thereby achieving the purpose of exhausting hot air.

[0056] Preferably, a plurality of ring plates 18 are fixedly installed on the outer periphery of the base cylinder 2, and a skin 19 is fixedly installed on the outer periphery of the base cylinder 2 through the ring plates 18, and the skin 19 is covered on the outer periphery of the surface ventilation hole group 10, and the surface ventilation hole group 10 is connected with the water-to-air radiator 12 through the cavity between the skin 19 and the base cylinder 2.

[0057] The skin 19 can be fixedly set on the base cylinder 2 and cover the outer periphery of the surface ventilation hole group 10, so that the cavity between the skin 19 and the base cylinder 2 can collect all the heated cooling air discharged from the surface ventilation hole group 10, and directly connect with the water-to-air radiator 12, forming a circulatory closed air path.

[0058] Preferably, a gap is formed between two stator core assembly blocks 4 adjacent to each other in the axial direction of the inner cylinder of the base cylinder 2 through a spacing member 20, and each spacing member 20 includes a ventilation slot plate 21 and a plurality of ventilation slot sheets 22, and the cross-sectional contour of the ventilation slot plate 21 is the same in size and structure as the cross-sectional contour of the stator core 5, that is, the cross-sectional contour of the ventilation slot plate 21 coincides with the cross-sectional contour of the stator core assembly block 4, and the outer periphery of the ventilation slot plate 21 is uniformly provided with a plurality of second dove tail grooves 27 matched with the dove tail ribs 16 along the circumferential direction, and each spacing member 20 is fixedly arranged in the inner cavity of the base cylinder 2 through the ventilation slot plate 21, and a plurality of ventilation slot sheets 22 are uniformly fixedly arranged on the end face of the disk body of the ventilation slot plate 21 along the circumferential direction, and each spacing member 20 is in contact with two adjacent stator core assembly blocks 4 in the front and rear through the ventilation slot plate 21 and the ventilation slot sheets 22, respectively.

[0059] The ventilation slot plate 21 can be fitted on the side end surface of the stator core assembly block 4 located at the rear, and the ventilation slot sheet 22 can abut against the side end surface of the stator core assembly block 4 located at the front, so that the positions of the two adjacent stator core assembly blocks 4 in the front and rear can be reliably located. The ventilation slot plate 21 is directly fitted with the side end surface of the stator core assembly block 4, and the ventilation slot sheet 22 itself is a plate-like structure and abuts against the side end surface of the stator core assembly block 4. Such a structure can not only achieve the purpose of reliably positioning the two stator core assembly blocks 4 in the front and rear, but also will not affect the smooth air path of the radial ventilation duct C of the core.

[0060] Preferably, a limit retaining ring 23 is fixedly installed at both ends of the stator core 5 in the inner cavity of the base cylinder 2, and a plurality of third dove tail grooves 24 cooperating with the dove tail ribs 16 are evenly opened on the outer periphery of the limit retaining ring 23 along the circumferential direction.

[0061] Preferably, the stator sheet 3 is evenly provided with a plurality of embedding strips 25 for embedding the stator coil along the circumferential direction, and the end of the embedding strip 25 of the stator sheet 3 is provided with a slot wedge 26 for fixing the stator coil.

[0062] The ventilation slot plate 21 and the limit retaining ring 23 are evenly provided with a plurality of embedding strips 25 for embedding the stator coil along the circumferential direction, and the ends of the embedding strips 25 of the ventilation slot plate 21 are provided with slot wedges 26 for fixing the stator coil.

[0063] The working principle of the present invention is as follows:

[0064] The technical solution of the present application can achieve circulating cooling on a large scale, that is, a circulation is formed between the base cylinder 2, the water-to-air radiator 12 and the cooling fan 13, and the cooling air can continuously circulate among the three to cool the inner cavity of the base cylinder 2. Furthermore, compared with the previous technology, the technical solution of the present application can form an air inlet path through the air inlet 11, the iron core radial ventilation duct C, the stator-rotor air gap D and the air inlet duct B, and the stator-rotor air gap D, the iron core radial ventilation duct C, the surface ventilation through hole group 10 and the air outlet duct A constitute the air outlet path. The air outlet path and the air inlet path are circulated and connected through the water-to-air radiator 12 and the cooling fan 13. The rotor core components can be cooled and cooled through the iron core radial ventilation duct C, and the cooling air can also enter the stator-rotor air gap D through the iron core radial ventilation duct C, so that the rotor core components can be cooled and cooled, forming a series cooling and cooling, while cooling the stator and rotor of the motor at the same time.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A water-air cooled permanent magnet direct drive motor structure, comprising a machine base (1) and a machine base cylinder (2), wherein a stator core component and a rotor core component are arranged in an inner cavity of the machine base cylinder (2), and the stator core component is fixedly arranged on the machine base (1) through the machine base cylinder (2), characterized in that: The stator core component comprises a plurality of stator punching sheets (3), wherein the plurality of stator punching sheets (3) are stacked in sections along the axial direction to form a stator core assembly block (4), wherein a plurality of groups of stator core assembly blocks (4) are evenly arranged in a circumferential annular array from front to back in the inner cavity of the machine base cylinder (2), and the plurality of groups of stator core assembly blocks (4) are combined to form a stator core (5) of the stator core component; The rotor core component comprises a plurality of permanent magnets (6) and a rotor core (7); the permanent magnets (6) and the rotor core (7) are fixedly mounted on a rotor support (8) by means of bolts; the rotor core component cooperates with the stator core component; A plurality of stator core assembly tables (9) for mounting stator core assembly blocks (4) are evenly arranged along the circumferential direction on the inner cylinder wall of the base cylinder (2); all stator core assembly blocks (4) are fixedly arranged in the inner cavity of the base cylinder (2) via the stator core assembly tables (9), that is, the stator core (5) is fixedly arranged in the inner cavity of the base cylinder (2) via the stator core assembly tables (9); The body of the base cylinder (2) is provided with a surface ventilation hole group (10) at each stator core assembly platform (9), and a gap is provided between each stator core assembly block (4) and the inner cylinder wall of the base cylinder (2), that is, an air outlet duct (A) is formed between each stator core assembly block (4) and the stator core assembly platform (9) matched therewith, and an air inlet duct (B) is formed between each stator core assembly block (4) and the inner cylinder wall of the base cylinder (2), and the air outlet duct (A) is formed between each stator core assembly block (4) and the inner cylinder wall of the base cylinder (2). ) is arranged adjacent to the air inlet duct (B), there is a gap between two stator core assembly blocks (4) adjacent to each other in the axial direction of the inner cylinder of the machine base cylinder (2), that is, a core radial ventilation duct (C) is formed between the two stator core assembly blocks (4) adjacent to each other, there is a gap between the stator core component and the rotor core component, that is, a stator-rotor air gap (D) is formed between the stator core component and the rotor core component, and the body of the machine base cylinder (2) has at least one air inlet (11); The air inlet (11), the iron core radial ventilation duct (C), the stator-rotor air gap (D) and the air inlet duct (B) constitute an air inlet path, the stator-rotor air gap (D), the iron core radial ventilation duct (C), the surface ventilation through hole group (10) and the air outlet duct (A) constitute an air outlet path, and the air inlet path and the air outlet path are circulated and connected via a water-to-air radiator (12) and a cooling fan (13).

2. The water-air cooled permanent magnet direct drive motor structure according to claim 1, characterized in that: The cooling fan (13) is connected to the air inlet (11), the surface ventilation hole group (10) is connected to the water-to-air radiator (12), and the water-to-air radiator (12) is connected to the cooling fan (13) through a ventilation duct, that is, the cooling air passes through the air inlet (11) and the iron core radial ventilation channel (C) in turn to reach the stator-rotor air gap (D) for cooling, and the heated cooling air passes through the stator-rotor air gap (D) and the iron core radial ventilation channel (C) in turn to reach the surface ventilation hole group (10), and realizes circulating cooling through the water-to-air radiator (12) and the cooling fan (13).

3. The water-air cooled permanent magnet direct drive motor structure according to claim 1, characterized in that: The stator core assembly platform (9) is composed of four isolation ribs (14), the four isolation ribs (14) form an air outlet cavity, and the surface ventilation through hole group (10) is located in the air outlet cavity.

4. The water-air cooled permanent magnet direct drive motor structure according to claim 3, characterized in that: The isolation rib (14) is provided with an assembly hole (15); the dovetail rib (16) is fixedly mounted on the isolation rib (14) by means of a bolt that cooperates with the assembly hole (15); two first dovetail grooves (17) are provided at the lower end of each stator punching sheet (3); the stator punching sheet (3) is fixedly mounted on the stator core assembly platform (9) by means of the tight fit between the first dovetail grooves (17) and the dovetail rib (16); and both ends of each stator punching sheet (3) are respectively fixedly mounted on two adjacent stator core assembly platforms (9) by means of the first dovetail grooves (17).

5. The water-air cooled permanent magnet direct drive motor structure according to claim 1, characterized in that: A plurality of ring plates (18) are fixedly mounted on the outer periphery of the machine base cylinder (2); a skin (19) is fixedly mounted on the outer periphery of the machine base cylinder (2) via the ring plates (18); and the skin (19) covers the outer periphery of the surface ventilation through hole group (10); the surface ventilation through hole group (10) is connected to the water-to-air radiator (12) via a cavity between the skin (19) and the machine base cylinder (2).

6. The water-air cooled permanent magnet direct drive motor structure according to claim 1, characterized in that: A gap is formed between two stator core assembly blocks (4) adjacent to each other in the axial direction of the inner cylinder of the machine base cylinder (2) through a spacing member (20). Each spacing member (20) comprises a ventilation slot plate (21) and a plurality of ventilation slot sheets (22). The cross-sectional profile of the ventilation slot plate (21) is the same in size and structure as the cross-sectional profile of the stator core (5), that is, the cross-sectional profile of the ventilation slot plate (21) coincides with the cross-sectional profile of the stator core assembly block (4). The outer periphery of the ventilation slot plate (21) is uniformly provided with a plurality of second dovetail grooves (27) matched with the dovetail ribs (16) along the circumferential direction. Each spacing member (20) is fixedly arranged in the inner cavity of the machine base cylinder (2) through the ventilation slot plate (21). The plurality of ventilation slot sheets (22) are uniformly fixedly arranged on the end surface of the plate body of the ventilation slot plate (21) along the circumferential direction. Each spacing member (20) is in contact with two stator core assembly blocks (4) adjacent to each other through the ventilation slot plate (21) and the ventilation slot sheets (22).

7. The water-air cooled permanent magnet direct drive motor structure according to claim 1, characterized in that: A limit retaining ring (23) is fixedly installed at both ends of the stator core (5) in the inner cavity of the base cylinder (2), and a plurality of third dove tail grooves (24) matching with the dove tail ribs (16) are evenly opened on the outer circumference of the limit retaining ring (23) along the circumferential direction.

8. The water-air cooled permanent magnet direct drive motor structure according to claim 1, characterized in that: The stator punching sheet (3) is evenly provided with a plurality of embedding strips (25) for embedding the stator coil along the circumferential direction, and the end of the embedding strip (25) of the stator punching sheet (3) is provided with a slot wedge (26) for fixing the stator coil.

9. A water-air cooled permanent magnet direct drive motor structure according to claim 6 or 7, characterized in that: The ventilation slot plate (21) and the limit retaining ring (23) are evenly provided with a plurality of embedding strips (25) for embedding the stator coil along the circumferential direction, and the embedding strips (25) of the ventilation slot plate (21) are provided with slot wedges (26) for fixing the stator coil at the ends thereof.

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