KR101770887B1 - Ventilative channel steel as well as manufacturing method, ventilating structure and motor thereof - Google Patents

Abstract

The present invention provides a ventilation groove shape, a manufacturing method thereof, a ventilation structure, and a motor. The ventilation groove shape steel provided by the present invention includes a ventilation groove shaped steel main body having a plurality of teeth on at least one side of two opposite sides. The vent structure provided by the present invention includes two core segments having a plurality of teeth, grooves for receiving windings between adjacent teeth of the same core segment are formed, Wherein the ventilation groove-shaped steel is provided between the teeth, and the teeth of the ventilation-groove shaped steel are directed to the groove. According to the present invention, it is possible to effectively break the boundary layer between the ventilation groove-shaped steel and the cooling gas flowing through the ventilation groove, to increase the heat radiation area and to enhance the cooling heat radiation effect, Process can be realized and manufacturing difficulty is low.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation groove, a manufacturing method thereof, a ventilation structure and a motor,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to cooling of a motor, and more particularly to a ventilation groove shape, a manufacturing method thereof, a ventilation structure, and a motor.

When a motor (including an electric motor and a generator) is operated, energy is consumed in a member such as a coil and a core, and the consumption of this part finally radiates in the form of heat energy. If the ventilation design of the motor is not reasonable, The temperature of the motor excessively increases or the temperature rise partially becomes non-uniform. If the temperature rises excessively, the insulation will deteriorate due to the aging of the insulation, resulting in a deterioration in the insulation performance of the insulation. Partially, if the temperature rise is not uniform, a very large thermal stress is generated, causing permanent damage to the motor structure, . Therefore, decreasing the temperature rise of the motor has an important meaning in increasing the safety margin of the motor, extending the service life of the motor, and reducing the maintenance cost of the motor.

Radial ventilation cooling is one of the common cooling schemes for small and medium sized generators. Such cooling schemes have been widely used because they increase the heat dissipation area and improve the power density of the motor. In order to achieve radial ventilation, the core of the motor is generally divided into a plurality of core segments, and between adjacent core segments there is provided a ventilation groove (or "vent strip") along the radial direction of the motor And the ventilation grooves serve to support the respective core segments and divide a space between adjacent core segments into ventilation grooves (also referred to as "radial ventilation grooves"), and the ventilation grooves are radially Thereby cooling and dissipating the core and the windings. The generally used ventilation grooves are generally rectangular in cross-section and the cross-section of the " elliptical "venting grooves is" Quot; or "ellipse " shape.

In the process of realizing the above technical solution, the inventor has discovered that at least the following problems exist in the existing technologies.

The design of existing vent grooves and vent structures did not specifically pay attention to the effect of the vent grooves on the cooling effect of the cooling gas. Existing ventilation grooves only serve to support and form the ventilation grooves between adjacent core segments. According to the analysis and the accident of the inventor, the shape of the ventilation groove groove greatly influences the flow of the cooling gas in the ventilation groove, thereby determining the superiority of the cooling performance of the motor. According to the different shape of the ventilation groove shape, The turbulence state of the cooling gas flowing through the motor is different and affects the heat radiation coefficient and the partial pressure drop of the motor surface, and ultimately affects the temperature rise of the motor. Therefore, the shape design of ventilation grooves is a core technology, and the shape design of the ventilation grooves is a core technology. The design of the ventilation grooves should consider the factors of craftability, installation reliability, and cost The design of the ventilation groove steel has a certain degree of difficulty. The inventors have found that although vented slotted sections have an important function, there is currently a relatively small amount of research on this aspect.

It is an object of the present invention to provide a ventilation groove-shaped steel capable of enhancing cooling heat radiation effect and facilitating the process, and to provide a ventilation structure and a motor having better cooling heat radiation effect.

In order to realize the above object, the present invention provides a ventilation groove shaped steel comprising a ventilation groove shaped steel main body having a plurality of teeth on at least one side of two opposite sides.

Preferably, the toothed portion may be triangular toothed, wavy toothed, rectangular toothed or trapezoidal toothed.

Wherein the tooth contour of the triangular saw tooth is two line segments having a common end point and the length of a line segment adjacent to the opposite wind edge of the ventilation groove shaped steel main body of the two line segments is close to the winded end of the ventilated groove steel main body May be greater than, less than, or equal to the length of the line segment.

Preferably, the tooth spacing between the plurality of teeth can be gradually reduced from the reverse wind end to the wind end of the ventilation groove shaped steel main body.

Preferably, the reference width of the ventilation-groove-shaped steel main body may gradually increase from the windward end to the windward end of the ventilated-groove-shaped steel main body.

Preferably, the reverse wind end of the vent groove is located in the head portion, and the width of the head portion is gradually decreased along the direction toward the wind direction.

Further, the faces on both sides of the upper end of the ventilating groove of the ventilating groove body may be planar, and the inclined angle between the two planes is an acute angle.

Preferably, the number of the ventilating-cavity-shaped steel main bodies may be two, and a space is provided between the two ventilating-cavity-shaped steel main bodies, and a plurality of teeth of the ventilating- do.

Preferably, a plurality of teeth may be provided on both of the two side surfaces of the ventilation groove-shaped steel main body.

Preferably, the venting groove shaped steel body may include a stamping steel in which a plurality of the venting groove shaped steel bodies are stacked together, wherein at least one edge of the stamping steel has a plurality of saw blades, and the plurality of saw blades of the stamping steel constitute the teeth do.

The present invention comprises at least two core segments having a plurality of teeth, wherein between adjacent teeth of the same core segment are grooves for receiving windings, and between adjacent tooth segments of adjacent core segments The above-mentioned arbitrary ventilation groove is provided, and the teeth of the ventilation groove-shaped steel further provide a ventilation structure facing the groove.

The present invention further provides a motor including the ventilation structure.

According to the present invention, there is provided a method of manufacturing a strip-shaped semi-finished product, comprising: obtaining a strip-shaped semi-finished product by cutting a raw material; And a step of machining the ventilation-groove-section semi-finished product to obtain a ventilation-groove-shaped steel main body and having a plurality of teeth on at least one side of two opposite sides of the ventilation-groove-shaped steel main body, to provide.

According to another aspect of the present invention, there is provided a method of manufacturing a ventilation duct, comprising the steps of: placing a semi-finished product in a mold cavity of a press mold; extruding the semi-finished product to obtain a ventilation- The method comprising the steps of:

According to another aspect of the present invention, there is provided a method of manufacturing a stamping machine, comprising the steps of: stamping a plurality of stamping steels to form a plurality of saw blades in at least one edge of the stamping steel; stacking the plurality of stamping steels together, And causing the saw blade of the plurality of stamped steels to form teeth on the side surface of the ventilation groove shaped steel main body.

The ventilation groove shape steel provided by the present invention mainly has the following advantageous effects. The teeth effectively break the boundary layer between the ventilation groove section and the cooling gas flowing through the ventilation groove to significantly increase the turbulence of the cooling gas to sufficiently bring the cooling gas into contact with the windings of the ventilation groove section and the sides thereof, Cooling heat radiation effect can be enhanced. The teeth can enlarge the boundaries of the ventilation groove sections to increase the heat dissipation area, thereby enhancing the heat radiation of the ventilation groove sections themselves. The teeth can be easily obtained by a conventional manufacturing process, so that the manufacturing difficulty is low and the production cost is relatively small. The cooling gas is basically disturbed in the width direction of the ventilation groove shape and this air flow disturbance method increases the width of the air flow in the high flow state of the side of the ventilation groove side when the toothed groove between the teeth of each tooth flows and the teeth, It is possible not only to improve the cooling effect on the windings of the ventilation groove sides of the cooling gas, but also to make the thickness of the ventilation groove steel itself relatively thin.

The ventilation structure and the motor provided by the present invention have the above-mentioned advantages of the ventilation groove shape steel, so that the cooling heat radiation effect is better, the temperature rise is effectively reduced, the reliability is improved, and the cost can be reduced.

The manufacturing method of the ventilation groove shape steel provided by the present invention is simple in the manufacturing process and easy to realize, and the ventilation groove shape steel produced and produced has the above advantages.

1 is a structural schematic diagram of a ventilation groove-shaped steel according to Embodiment 1 of the present invention.
2 is a structural schematic diagram of a ventilation groove-shaped steel according to Embodiment 2 of the present invention.
3 is a structural schematic diagram of a ventilation groove-shaped steel of Embodiment 3 of the present invention.
4 is a structural schematic diagram of a ventilation groove shape steel according to Embodiment 4 of the present invention.
5 is a structural schematic diagram of a ventilation groove-shaped steel according to Embodiment 5 of the present invention.
6 is a structural schematic diagram of the ventilation groove shape steel of the sixth embodiment of the present invention.
7 is a structural schematic diagram of the ventilation groove-shaped steel of the seventh embodiment of the present invention.
8 is a perspective view schematically showing the ventilation groove section of the eighth embodiment of the present invention.
Fig. 9 is a schematic view showing a ventilation groove of an embodiment 9 of the present invention in an exploded perspective view.
10 is a perspective view of a ventilation structure according to a tenth embodiment of the present invention.
11 is a schematic cross-sectional view of the ventilation structure of the tenth embodiment of the present invention.
12 is a flowchart of a method of manufacturing a ventilation groove shaped steel according to the eleventh embodiment of the present invention.
13 is a flowchart of a method of manufacturing a ventilation groove-shaped steel according to the twelfth embodiment of the present invention.
14 is a flowchart of a method of manufacturing a ventilation groove-shaped steel according to the thirteenth embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

Example 1

1 is a structural schematic diagram of a ventilation groove-shaped steel according to Embodiment 1 of the present invention. The ventilation groove-shaped steel of Embodiment 1 of the present invention has a plurality of teeth 12 on the side of at least one (for example, two in the figure) of two opposing sides of the ventilation groove-shaped steel main body 11 And a ventilated-groove-shaped steel main body 11 which is made of a metal.

The ventilation groove of Embodiment 1 of the present invention is different from the conventional ventilation groove of conventional art and the ventilation groove of the strip type in that the teeth 12 provided on the side face of the ventilation groove- And the like.

1. The boundary layer between the ventilation groove and the cooling gas flowing through the ventilation groove is effectively broken to significantly increase the turbulence of the cooling gas to sufficiently bring the cooling gas into contact with the windings of the ventilation- And cooling heat radiation effect can be enhanced.

2. It is possible to increase the heat dissipation area of the ventilation groove by enlarging the boundary of the ventilation groove to enhance the heat dissipation of the ventilation groove itself.

3. The serrated structure can be easily obtained by a conventional manufacturing process, so that the manufacturing difficulty is low and the manufacturing cost is relatively small. In particular, the integrated structure of the plurality of teeth 12 and the ventilation groove shaped steel main body 11 can be formed through manufacture.

4. When the tooth grooves between the teeth of the respective teeth 12 and the respective teeth 12 flow, the cooling gas is basically disturbed in the width direction of the ventilation groove-shaped steel, and this air- It is possible to increase the width of the air flow in the state to make the cooling effect on the windings of the side walls of the ventilation groove of the cooling gas to be better and also to make the thickness of the ventilation groove steel itself relatively thin.

In addition to having the above-described features, the ventilation groove steel of the present embodiment further has other features, which will be described below.

In the present embodiment, since the teeth 12 are provided on both sides of the ventilation groove-shaped main body 11, the above-described effects can be realized on both sides of the ventilation groove-shaped steel. The plurality of teeth 12 in the present embodiment are distributed asymmetrically on both sides of the ventilation groove shaped steel main body 11. This distribution type is applied to a situation in which the air flow path itself of the ventilation grooves of both sides of the ventilation groove shaped asymmetric, So that the cooling and heat dissipating capacities of both sides of the ventilation groove steel are basically matched.

The ventilation groove is generally provided with a reverse wind stage and a wind wind stage. The reverse wind stage is a stage facing upstream of the cooling gas, and the wind wind stage is a stage facing the cooling gas downstream. The backward wind stage 111 of the ventilation groove steel main body 11 in this embodiment is located in the head portion and the width of the head portion gradually decreases along the direction toward the windward end 111 and this design has a good wind inducing effect And reduce the wind resistance to effectively reduce the temperature of the motor windings without increasing the resistance to the motor cooling system. Concretely, the faces on both sides of the upper end of the reverse wind stage 111 of the ventilation groove steel main body 11 may be planar, and the inclined angle is provided between the two planes. In the present embodiment, the subtended angle is an acute angle. However, this inclined angle can be designed with an obtuse angle, and an acute angle is better than an obtuse angle. In addition, the side surfaces on both sides of the upper end of the reverse wind end 111 of the ventilation groove steel main body 11 may be designed to have the same curved surface as the elliptical arc surface. That is, the outline of the ventilating groove end 111 of the ventilating groove steel main body 11 can be an elliptic arc shape, thereby realizing a relatively good wind guiding effect.

In this embodiment, the teeth 12 are triangular teeth 121 (which can be understood as a plurality of teeth 12 forming a sawtooth shape). The tooth surfaces on both sides of the tooth tops of the triangular teeth 121 are planar, and an inclined angle is provided between these two planes. In the triangle teeth 121 of the present embodiment, the outlines of the teeth of the triangular teeth 121 (the outline obtained by cutting the tooth surface by a plane perpendicular to the tooth surface) are two line segments having a common end point, The length of the line segment near the reverse wind end 111 of the groove steel main body 11 is larger than the length of the line segment adjacent to the wind end 112 of the ventilation groove shaped steel main body 11, The end can be advanced to the downstream side of the cooling gas, thereby reducing wind resistance.

In this embodiment, the tooth intervals between the plurality of teeth 12 (the interval between the adjacent teeth 12) are uniform and the plurality of teeth 12 are arranged adjacent to each other in order. The reference width of the ventilation groove shaped steel main body 11 does not change from the reverse wind end 111 to the winded end 112 in addition to the wind guiding portion of the reverse wind stage 111 described above. In other words, when the plane passing through the center portion of each tooth 12 is a reference plane (or a scale plane) and the interval between the reference planes on both sides of the ventilation groove shaped steel main body 11 is set as a reference width, It is assumed that the reference plane on both sides of the ventilation groove shaped steel main body 11 is the same from the stage 111 to the winded stage 112 or parallel. In addition, the entire ventilation groove is an integrated structure. The number of the ventilation groove steel main bodies 11 is one.

Example 2

2 is a structural schematic diagram of a ventilation groove-shaped steel according to Embodiment 2 of the present invention. The teeth of the ventilation groove-shaped steel of this embodiment are likewise triangular teeth 121 and the tooth contour thereof are two line segments having a common end point in the same manner. The distinction point between the ventilation groove-shaped steel of this embodiment and the ventilation- . The length of the line segment adjacent to the reverse wind end 111 of the ventilation groove shaped steel main body 11 is smaller than the length of the line segment adjacent to the winded end 112 of the vented groove shaped steel main body 11. That is, the end portion of the triangular sawtooth 121 approaches the upstream side of the cooling gas, thereby effectively increasing the area of impact between the triangular sawtooth 121 and the cooling wind, resulting in a larger turbulence effect, It is possible to increase the width of the air flow in the high-flow state of the ventilation groove side.

Example 3

3 is a structural schematic diagram of a ventilation groove-shaped steel of Embodiment 3 of the present invention. The teeth of the ventilation groove-shaped steel of the present embodiment are likewise triangular teeth 121, and the tooth contour lines thereof are two line segments having a common end point in the same way. The ventilation groove-shaped steel of this embodiment and the ventilation- The distinction is mainly as follows. The length of a line segment near the reverse wind end 111 of the ventilation groove steel main body 11 is the same as the length of the line segment adjacent to the wind end 112 of the ventilation groove shaped steel main body 11. [ That is, the end portion of the triangular sawteeth 121 is perpendicular to the direction of the ventilation groove shaped steel main body 11, and this shape is a sawtooth-shaped compromised shape in Example 1 and Example 2, The turbulence effect can be generated, and the wind resistance can be reduced as compared with the second embodiment.

In addition, in this embodiment, a plurality of teeth (triangular sawteeth 121) are symmetrically distributed on both sides of the ventilation groove shaped steel main body 11.

Example 4

4 is a structural schematic diagram of a ventilation groove shape steel according to Embodiment 4 of the present invention. The distinction between the ventilation groove-shaped steel of this embodiment and the ventilation-groove-shaped steel according to the above embodiment is mainly as follows.

The teeth of the ventilation groove-shaped steel of this embodiment are the wave-like teeth 122. In the case of the wave-like teeth 122, it can be understood that the tooth contour of the plurality of teeth constitutes a wavy shape. By using the wavy saw teeth 122, the contact area with the cooling wind can be enlarged to enhance the heat radiation effect.

In addition to the above-described wind guiding portion of the backward wind stage 111, the reference width of the ventilation groove shaped steel main body 11 of the present embodiment (assuming that the plane passing through the center portion of each tooth is the reference plane, ) Is gradually increased from the reverse wind end 111 to the wind wind end 112, and the distance between the ventilated-groove-like steel main body 11 and the windings of both sides thereof Since the width gradually decreases from the wind direction 111 to the wind direction 112 and the cooling wind gradually absorbs the heat amount during the flow process and the temperature gradually rises, the design is such that the cooling effect on the windings is relatively in the radial direction So that damage to the winding due to uneven temperature rise can be prevented.

Example 5

5 is a structural schematic diagram of a ventilation groove-shaped steel according to Embodiment 5 of the present invention. The venting groove-shaped steel of this embodiment is different from the ventilation-groove-shaped steel of the above-described embodiment in that the teeth of the ventilation groove-shaped steel of this embodiment are the rectangular teeth 123. The use of the rectangular sawteeth 123 can increase the turbulence and improve the heat dissipation effect.

In addition to some of the serrations described in some of the above embodiments, the teeth 12 may also be trapezoidal teeth, and the trapezoidal teeth may also increase turbulence and improve heat dissipation.

Example 6

As shown in FIG. 6, this is a structural schematic diagram of the ventilation groove-shaped steel of Example 6 of the present invention. In the ventilation groove-shaped steel of each of the above-described embodiments, the teeth 12 are uniformly distributed in the direction along the ventilation-groove-shaped steel main body 11, and the ventilation-groove shaped steel of this embodiment is distinguished from the following. The tooth spacing between the plurality of teeth 12 gradually decreases from the reverse wind end 111 of the ventilation groove shaped steel main body 11 to the winded end 112. In this case, In other words, the teeth 12 adjacent to the pre-wind stage 112 are distributed more densely than the teeth 12 adjacent to the reverse wind stage 111, so that the closer to the wind wind stage 112, As the degree of turbulence increases and the cooling gas flows from the reverse wind stage 111 to the wind wind stage 112, the temperature gradually rises. This design also prevents the cooling effect on the ventilation groove shapes, cores and windings from being relatively So that it is possible to prevent the damage of the ventilation groove, the core and the winding due to the uneven rise of the temperature.

Example 7

As shown in Fig. 7, this is a structural schematic view of the ventilation groove-shaped steel of Example 7 of the present invention. The number of the ventilation-groove-shaped steel main bodies 11 in the ventilation-groove-shaped steel of each of the above-described embodiments is one, and the ventilation-groove-shaped steel of this embodiment is distinguished from the following.

In this embodiment, the number of the ventilation groove-shaped steel main bodies 11 is two, the gap 13 is provided between the two ventilation groove shaped steel main bodies 11, and a plurality of teeth 12 are provided on the outer side facing the gap 13. As described above, in each ventilation groove-like steel main body 11 of this embodiment, only one tooth 12 is provided and the passage between the two ventilation-groove shaped steel main bodies 11 allows the cooling gas to flow, It is possible to increase the contact area between the ventilation groove and the cooling gas to enhance the heat dissipation effect of the ventilation groove and reduce the wind resistance to a certain degree.

In addition, in the present embodiment, although the width of the head portion where the reverse wind end 111 of the ventilation groove shaped steel main body 11 is located gradually decreases along the direction toward the reverse wind end 111, Side surfaces of the ventilating-groove-shaped steel main body 11 of this embodiment are also flat, but the plane of one of them and the side surface of the ventilating-groove-shaped steel main body 11 are the same. The head portion of the ventilation groove steel main body 11 of the present embodiment in which the reverse wind stage 111 is located can be designed in the form of an inclined plane on both sides as in the above embodiment.

Example 8

As shown in Fig. 8, this is a schematic view of a ventilation groove section of the eighth embodiment of the present invention. The venting groove-shaped steel of this embodiment is different from the ventilation-groove-shaped steel of the above embodiment in that the ventilation-groove-shaped steel main body 11 is provided with the airflow passage 14 penetrating the ventilation-groove-shaped steel main body 11 It is. Here, the airflow passage 14 can increase the contact area between the ventilation groove-shaped steel and the cooling body to enhance the heat radiating effect of the ventilation groove-shaped steel, and at the same time, the airflow passage 14 can also function to reduce wind resistance to a certain degree .

Example 9

As shown in Fig. 9, this is a schematic view of the ventilation groove shape of the embodiment 9 of the present invention. The distinction between the ventilation groove-shaped steel of this embodiment and the ventilation-groove-shaped steel of the above embodiment is as follows. In this embodiment, the ventilation groove shaped steel main body 11 includes a stamping steel 113 in which a plurality of the stamping steel 113 are stacked together and the edge of at least one (for example, two in the drawing) of the stamping steel 113 And a plurality of saw blades 1131 of the stamping steel 113 constitute the teeth 12. In this case, Such a special structure is suitable for mass production, which can greatly reduce the production cost. More specifically, the stamping steel can be stamped on the basis of a necessary form, and then a plurality of stamping steels can be compression-molded. For example, if the final thickness of the vent groove is 8 mm, then eight stamping steels can be stamped, one stamping steel thickness is 1 mm, then they are pressed (or squeezed) It is made into section steel.

As described above, the ventilation grooves of the respective embodiments of the present invention have been described. As can be seen from the above description, the ventilation groove shape steel provided by the present invention has a relatively large degree of freedom. For example, the ventilation groove shape groove can be formed at both sides, Or may be uneven. Alternatively, both sides may be wavy teeth, and the intervals of the wavy teeth may be uniform or non-uniform. Alternatively, the teeth of each type may be uniformly symmetrical or spaced apart at left and right sides. Alternatively, the widths of both ends of the ventilation groove can be the same or different, and the center heat radiation region of the winding can be adjusted based on the groove pitch or groove bottom. In addition, since the ventilation groove shape steel provided by the present invention is easily realized, the design of the ventilation groove shape steel can be easily adjusted to satisfy various practical cooling and heat radiation requirements.

On the basis of the feature that the ventilation groove shape steel provided by the present invention has teeth, the ventilation groove shape steel provided by the present invention can also be referred to as "serrated ventilation groove shape steel", but it should be noted that " "Is a generalized name for motor cooling technology, which distinguishes itself from" home steel "steels in which the cross-section of other fields is groove-like, and the material itself is not limited to" steel " It may also be a base metal having a relatively high thermal conductivity. Hereinafter, the ventilation structure of the embodiment of the present invention will be described.

Example 10

10 and 11, here, FIG. 10 is a perspective view of the ventilation structure of the tenth embodiment of the present invention, and shows a shape when viewed from the outside of the ventilation structure. 11 is a cross-sectional schematic diagram of a ventilation structure according to a tenth embodiment of the present invention, which shows a shape when observed inside the ventilation structure. The ventilation structure of the embodiment of the present invention includes at least two (for example, three shown in the figure) core segments 2 and a plurality of (for example, five (Not shown in the figure, but by means of a winding 3) for receiving the winding 3 between the adjacent tooth portions 21 of the same core segment 2, And the teeth of the ventilation groove-shaped steel 1 are provided between the teeth 21 of the adjacent core segments 2 facing each other, (That is, the side surface on which the teeth of the ventilation groove-shaped steel 1 are installed faces the winding 3).

During operation of the ventilation structure of this embodiment, the cooling gas flows along the direction indicated by the dotted arrow in Fig. 11 in the ventilation groove, and in the course of flow, the cooling gas collides with the teeth on both sides of the ventilation- It is disturbed in the width direction of the groove section 1 to form a comparatively wide turbulent flow. The turbulent air current significantly promotes the cooling effect of the cooling gas by advancing an effective thermal flow with the windings 3 and the toothed portions 21 on both sides of the ventilation groove shape steel 1 and also the teeth of the ventilation- The heat dissipating area of the groove section 1 can be enlarged and the heat radiation of the ventilation groove section 1 itself can be strengthened.

As a result of verification simulation using the flow field calculation software on the basis of the above structure and examining it through an experimental platform, the inventors have found that the ventilation grooves of the above-mentioned different embodiments have a 5 to 10K motor The temperature rise of the windings can be effectively reduced, which can greatly increase the safety margin of the motor, extend its service life and reduce maintenance costs. If the temperature rise of the motor is kept unchanged, it can be combined with the optimized design of the motor to increase the power density, reduce the weight, and reduce the cost. For example, if it is designed according to the motor insulation class B and the unchanged temperature rise of 90K is maintained, 5% of the used amount can be saved directly by arranging the ventilation groove steel.

In this embodiment, a slot wedge 4 for fastening the windings 3 in the grooves is further connected between the teeth 21 adjacent to each other, thereby preventing occurrence of displacement in the radial direction. Specifically, the core segment 2 of the present embodiment may be a core segment (referred to as a "core" or an "iron core") of the stator core and may be a core segment of the rotor core. In some ventilation structures of motors, a ventilation groove plate is further provided between adjacent core segments 2. In this case, the ventilation groove of the above embodiment can be welded to the ventilation groove plate by a welding process such as spot welding.

The ventilation structure provided in this embodiment can be applied to a motor such as a conventional air-cooled generator, an electric motor and the like. For example, the ventilation structure can be applied to a large wind power generator, a small- Not only significantly improves but also realizes the process easily and has a wide range of application prospects. Hereinafter, a method for manufacturing a ventilation groove-shaped steel according to an embodiment of the present invention will be described, and the above drawings can be referred to when reading out the method for manufacturing the ventilation-groove shaped steel of the embodiment of the present invention.

Example 11

12 is a flowchart of a method of manufacturing a ventilation groove shaped steel according to the eleventh embodiment of the present invention. The manufacturing method of this embodiment includes a step 101 of cutting a raw material to obtain a strip type semi-finished product; A step 102 of obtaining a semi-finished draft product by cutting the strip-shaped semi-finished product; The step of machining the ventilated groove steel half product to obtain the ventilated groove shaped steel main body 11 and having the plurality of teeth 12 on at least one of the two opposite side faces of the ventilated groove shaped steel main body 11 do.

The cutting and cutting processes in the manufacturing method of the ventilation groove shape steel of the present embodiment are both easy to realize and simple to manufacture and can be used for manufacturing the ventilation groove steel of any one of Embodiments 1 to 8, The ventilation groove steel main body 11 and the teeth 12 have an integrated structure as a whole.

Specifically, in step 101, the raw material can be cut using a cutting machine, and the raw material can specifically be a steel sheet. The thickness requirement of the ventilation groove steel main body 11 can be satisfied by selecting the steel plate having the opposite thickness. In step 102, the ventilated-groove steel half product can be divided and cut using a cutter. In step 103, the ventilated-slotted-section semi-finished product can be cut using a cutting machine.

Further, if the number of the ventilation groove shaped steel main bodies 11 is two (for example, the ventilation groove shaped steel of Example 7) in the ventilation groove shape steel to be manufactured,

Step 103 is concretely concretely a step of machining the ventilation groove section steel product to obtain the ventilation groove section steel main body 11 and to provide the ventilation groove section steel main body 11 with a plurality of teeth 12 on one of the two facing side surfaces .

The manufacturing method is characterized in that two ventilation groove shaped steel main bodies 11 are inserted so that a gap 13 is formed between two ventilation groove shaped steel main bodies 11 and a plurality of teeth 12 of the ventilation groove shaped steel main body 11 are arranged at intervals (13) and the outer surface (13).

Example 12

13 is a flowchart of a method of manufacturing a ventilation groove-shaped steel according to the twelfth embodiment of the present invention. The manufacturing method of this embodiment includes a step 201 of inserting the semi-finished product into the mold cavity of the press mold; Step 202 of extruding the semi-finished product to obtain a ventilated-groove-shaped main body 11 and having a plurality of teeth 12 on at least one side of two opposite sides of the ventilated-groove-shaped main body 11.

The manufacturing method of the ventilation groove type steel of this embodiment can easily realize the extrusion, can be primarily molded, and the manufacturing process is simple, so that the ventilation groove shape steel of any one of the first to eighth embodiments And the ventilation groove steel main body 11 and the teeth 12 thus obtained also have an integrated structure as a whole.

Specifically, in step 201, the shape of the mold cavity of the press mold can be interlocked with the outline of the ventilation groove shape steel of any one of the first to eighth embodiments. In step 202, the semi-finished product can be extruded using an extruder.

If the number of the ventilation groove shaped steel main bodies 11 is two (for example, the ventilation groove shaped steel of the seventh embodiment) in the ventilation groove shape steel to be manufactured, Specifically, the semi-finished product may be extruded to obtain the ventilation groove shaped main body 11 and to have a plurality of teeth 12 on at least one side of the two opposing sides of the ventilation groove shaped main body 11 have.

In the above manufacturing method, two ventilation groove shaped steel main bodies 11 are inserted and a gap 13 is provided between the two ventilation groove shaped steel main bodies 11 so that a plurality of teeth 12 of the ventilation groove shaped steel main body 11 are spaced apart from each other (13) and the outer surface (13).

Example 13

As shown in Fig. 14, this is a flow chart of a method of manufacturing the ventilation groove-shaped steel of the thirteenth embodiment of the present invention. The manufacturing method of this embodiment includes a step 301 of stamping a plurality of stamping steels 113 so as to have a plurality of saw blades 1131 at at least one edge of the stamping steel 113; A plurality of stamping steels 113 are stacked together and stacked by a ventilation groove shaped steel main body 11 and a saw blade 1131 of a plurality of stamped steels 113 constitutes a tooth 12 on the side surface of the ventilation groove shaped steel main body 11 (Step 302).

The stamping and pressing process of the stamping steel in the manufacturing method of the ventilation groove shape steel of the present embodiment is easy to realize and the manufacturing process is simple and can be used for manufacturing the ventilation groove shape steel of the embodiment 9. The stamping steel 113, The saw blades 1131 are integrally formed, but the entire ventilation groove shaped steel main body 11 is not integral. The manufacturing method of the ventilation groove shaped steel of this embodiment is suitable for mass production, and the production cost can be greatly reduced. Specifically, in step 301, a plurality of stamped steels 113 can be stamped using a stamping machine.

In view of the above, the preferred technical solution provided in the embodiment of the present invention has at least the following features.

The present invention increases the turbulence effect by effectively breaking the boundary layer between the groove-shaped steel and the cooling air by increasing the serration-like structure on both sides of the ventilation groove, so that the cooling wind and the groove- To maximize the cooling capacity of the cooling gas, and the ventilation grooved type complements the single space. At the same time, a sawtooth is opened to enlarge the boundary of the ventilation groove to increase the heat radiation area. According to the results of finite element analysis and measurement, different types of grooved steel can effectively reduce the temperature of the windings of the motor by 5 to 10K.

2. The head part of the ventilation grooves can be of a sharp-tipped type (which may be acute or arc-shaped) and has a good wind induction effect to effectively reduce the temperature of the motor windings without increasing the resistance to the motor cooling system Can be realized.

3. Process can be easily realized.

It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. All of which are within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the present invention.

1: Ventilation groove shape steel 11: Ventilation groove shape steel body
111: Wind direction 112: Wind direction
113: stamping steel 1131: saw blade
12: sawtooth 121: triangular sawtooth
122: wave saw teeth 123: rectangular saw teeth
13: gap 14: airflow passage
2: Core segment 21:
3: winding 4: slot wedge

Claims (15)

A ventilation channel steel according to any one of claims 1 to 3, further comprising a ventilation groove-shaped steel main body, wherein the number of the ventilation-groove-shaped steel main bodies is two and a space is provided between the two ventilation- And a plurality of teeth are provided on the outer side face facing the wind direction from the opposite wind direction to the wind direction end. The method according to claim 1,
Wherein the teeth are triangular toothed, wave-like toothed, rectangular toothed, or trapezoidal teeth. 3. The method of claim 2,
Wherein the tooth contour of the triangular saw tooth is two line segments having a common end point and the length of the line segment adjacent to the opposite wind edge of the ventilation groove shaped main body of the two line segments is equal to the length of the line segment Or less than, or equal to, the thickness of the ventilation groove. The method according to claim 1,
And the interval between the teeth of the plurality of teeth gradually decreases from the windward end to the windward end of the ventilation groove shaped main body. The method according to claim 1,
And the reference width of the ventilation-groove-shaped steel main body gradually increases from the windward end to the windward end of the ventilated-groove-shaped steel main body. The method according to claim 1,
Wherein the ventilating groove-shaped steel main body is located at the head portion and the width of the head portion is gradually decreased along the direction toward the opposite-wind end. The method according to claim 6,
Wherein the ventilating groove-shaped steel main body has planes on opposite sides of the upper end of the ventilating-groove-shaped main body, and the inclined angle between the two planes is an acute angle. delete delete The method according to claim 1,
Wherein the ventilation groove-shaped steel main body includes a stamping steel in which a plurality of ventilation-
There is a plurality of saw blades at one edge of the stamping steel,
And the plurality of saw blades of the stamped steel constitute the teeth. At least two core segments having a plurality of tooth portions,
Wherein grooves for receiving the windings are formed between adjacent tooth portions of the same core segment and between adjacent tooth portions of the adjacent core segments, And the teeth of the ventilation groove-shaped steel are directed to the groove. A motor comprising the ventilation structure according to claim 11. Cutting the raw material to obtain a strip-shaped semi-finished product;
Dividing the strip-shaped semi-finished product to obtain a ventilated-groove-shaped semi-finished product;
Cutting the semi-finished product of the ventilated-groove steel to obtain a ventilated-groove-shaped steel main body and having a plurality of teeth on one of two opposite sides of the ventilated-groove-shaped steel main body. 7. A method of manufacturing a ventilation-cavity-shaped steel according to any one of claims 1 to 7. Placing the semi-finished article in a mold cavity of a press mold;
A step of extruding the semi-finished product to obtain a ventilation groove shaped main body, and a step of providing a plurality of teeth on one side of two opposite side surfaces of the ventilation groove shaped main body, A method of manufacturing a ventilation groove shaped according to any one of the preceding claims. Stamping a plurality of stamped steels to provide a plurality of saw blades at at least one edge of the stamped steel;
Stacking the plurality of stamping steels together and stacking them with the ventilation groove shaped main body and causing the saw blade of the plurality of stamped steel to form the teeth of the side surface of the ventilation groove shaped steel main body. A method of manufacturing a ventilation channel steel according to claim 10.

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