Wind guide structure, magnetic yoke assembly and salient pole motor

Abstract

The application provides a guide air structure, a magnetic yoke assembly and a salient pole motor. The guide air structure comprises: a guide air sheet; and a positioning block connected with the guide air sheet; the positioning block is connected with the guide air sheet; the positioning block is used for mounting and positioning the guide air structure and a magnetic yoke sheet, so that after the guide air structure is mounted and fixed on the magnetic yoke sheet, the guide air sheet is arranged at an air outlet of a magnetic yoke air duct formed by the magnetic yoke sheet, and the magnetic yoke air duct is divided into a first air outlet channel and a second air outlet channel with the same cross-sectional area at the same radial position. The application aims to solve the technical problems of low installation precision, poor guide air uniformity and poor fixing effect of the guide air sheet in the prior art.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, specifically to an air guide structure, a magnetic yoke assembly, and a salient pole motor. Background Technology

[0002] In a salient-pole synchronous motor, the magnetic poles are mounted on the outer surface of the yoke, while the inner surface of the yoke is connected to the rotor support. Each magnetic pole consists of a pole core, pole pressure plates, pole coils, damping windings, and pole tie rods. The pole coils are formed by stacking multiple layers of insulated current-carrying buses. When the pole coils are fitted over the pole core and current is passed through them, they resemble a spiral coil, generating a magnetic field. The pole core supports the pole coils and amplifies the magnetic field. The yoke is typically constructed by stacking yoke sheets of a certain thickness, with ventilation channels formed between the sheets.

[0003] With technological advancements, the single-unit capacity of salient-pole motors is continuously increasing. For high-speed, high-capacity motors, the increase in capacity per pole is even more significant, leading to increased heat generation in the pole coils and impacting the motor's operating performance. Under current technological conditions, to ensure the pole coils operate within a reasonable temperature range, guide vanes are installed within the yoke ventilation duct, dividing the outer diameter outlet of the yoke ventilation duct into two air outlets. This allows the cooling gas to be split into two airflows, each directed towards the adjacent circumferentially adjacent cold ventilation ducts within the pole coils, effectively enhancing the cooling effect on the pole coils.

[0004] However, due to the low installation precision of the air guide vanes, there are differences in the cross-section of the magnetic yoke ventilation duct, which in turn results in different airflow and air pressure of the cooling air blown onto the magnetic pole coils. This leads to temperature differences between the magnetic pole coils and affects the performance of the salient pole motor. Summary of the Invention

[0005] This application provides an air guide structure, a magnetic yoke assembly, and a salient pole motor, aiming to solve the technical problem of low installation accuracy of air guide vanes in the prior art.

[0006] Therefore, this application proposes an air guiding structure, comprising:

[0007] An air guide vane; and a positioning block, wherein the positioning block is connected to the air guide vane; the positioning block is used for the installation and positioning of the air guide structure and the magnetic yoke, such that after the air guide structure is installed and fixed onto the magnetic yoke, the air guide vane is positioned at the air outlet of the magnetic yoke ventilation duct formed by the magnetic yoke, and the magnetic yoke ventilation duct is divided into a first air outlet channel and a second air outlet channel with the same cross-sectional area at the same radial position.

[0008] Optionally, the positioning block has a first side surface and a second side surface arranged opposite each other in the circumferential direction, and a first end surface and a second end surface arranged opposite each other in the radial direction; the first end surface is arranged facing the air inlet side of the air guide structure, and the second end surface is arranged facing the air outlet side of the air guide structure; wherein, the first angle and the second angle formed by the first side surface and the second side surface with the first end surface are both acute angles, and the third angle and the fourth angle formed by the first side surface and the second side surface with the second end surface are both obtuse angles.

[0009] Optionally, the first included angle and the second included angle are equal, and the third included angle and the fourth included angle are equal; the first side surface, the second side surface, and the first end surface are all planar.

[0010] Optionally, the positioning block has a connecting hole that passes through the first end face and the second end face.

[0011] Optionally, the air guide plate has a first support surface and a second support surface that are arranged opposite to each other in the thickness direction; the first support surface and the second support surface are respectively used to abut against magnetic yoke plates that are arranged adjacent to each other in the thickness direction.

[0012] Optionally, the positioning block protrudes from the first support surface and the second support surface.

[0013] This application also proposes a magnetic yoke assembly, comprising: at least two magnetic yoke plates, wherein the at least two magnetic yoke plates form a magnetic yoke ventilation channel; each magnetic yoke plate has a preset mounting portion; and an air guiding structure as described above; wherein the positioning block is connected to the preset mounting portion so that after the air guiding structure is installed and fixed onto the magnetic yoke plate, the air guiding plate is positioned at the air outlet of the magnetic yoke ventilation channel formed by the magnetic yoke plate, and the magnetic yoke ventilation channel is divided into a first air outlet channel and a second air outlet channel with the same cross-sectional area at the same radial position.

[0014] Optionally, the preset mounting part is a mounting groove, and the positioning block is embedded in the mounting groove, so that the first support surface and the second support surface of the air guide plate respectively abut against two adjacent magnetic yoke plates in the thickness direction.

[0015] Optionally, the mounting groove has a first side groove surface and a second side groove surface arranged opposite each other in the circumferential direction, and the spacing between the first side groove surface and the second side groove surface gradually decreases in the radial direction from the air inlet side to the air outlet side.

[0016] This application also proposes a salient pole motor, including the magnetic yoke assembly as described above.

[0017] This application proposes an air guiding structure, including an air guide vane and a positioning block, with the positioning block and air guide vane connected. The positioning block is used for mounting and positioning the air guiding structure and the magnetic yoke, so that after the air guiding structure is installed and fixed onto the magnetic yoke, the air guide vane is positioned at the air outlet of the magnetic yoke ventilation channel formed by the magnetic yoke, dividing the magnetic yoke ventilation channel into a first air outlet channel and a second air outlet channel with the same cross-sectional area at the same radial position. Therefore, in practical applications, air enters the first air outlet channel and the second air outlet channel under the guidance of the air guide vane. The air pressure and air volume are consistent in the first and second air outlet channels, and the air pressure and air volume in the flow channel entering the magnetic pole coil are also consistent, thus providing consistent cooling effect to the magnetic pole coil and reducing the temperature difference between the magnetic pole coils. This overcomes the technical problem in the prior art where the air guide vane has low installation accuracy, resulting in differences in the cross-section of the divided magnetic yoke ventilation channels, leading to different air volume and air pressure of the cooling air blown onto the magnetic pole coils, causing temperature differences between the magnetic pole coils and affecting the performance of the salient pole motor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the air guiding structure provided in the embodiment of this application from one perspective;

[0020] Figure 2 This is a partial structural schematic diagram of the magnetic yoke assembly provided in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the positioning block provided in the embodiments of this application from one perspective;

[0022] Figure 4 This is a schematic diagram of the force analysis of the positioning block provided in the embodiment of this application when the rotor support rotates;

[0023] Figure 5 This is a cross-sectional schematic diagram of the air guide structure provided in the embodiments of this application;

[0024] Figure 6 This is a three-dimensional structural diagram of the air guide structure provided in the embodiments of this application;

[0025] Figure 7 This is a three-dimensional structural schematic diagram of the magnetic yoke sheet provided in the embodiments of this application;

[0026] Figure 8 This is a schematic diagram of the assembly process of the magnetic yoke assembly proposed in the embodiments of this application.

[0027] List of reference numerals

[0028] 100 air guide structure 120d Second end face 200 Magnetic yoke 120e Connection hole 300 Magnetic pole coil 200a Pre-installation section 110 air guide plate 200a-1 First side groove surface 120 Positioning block 200a-2 Second side groove surface 110a First support surface 200a-3 Third side groove surface 110b Second support surface S Magnetic yoke ventilation duct 120a First side view S1 First air outlet 120b Second side S2 Second air outlet duct 120c First end face Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0032] In existing technologies, a cooling air guide device for the magnetic pole coil of a salient-pole motor includes a rotor support, a yoke assembly, and several magnetic poles. The magnetic poles are mounted on the outer surface of the yoke assembly, and the inner surface of the yoke assembly is connected to the rotor support. A yoke ventilation channel is formed between the yoke plates. In the magnetic pole coil, each layer of current-carrying busbars or between adjacent current-carrying busbars has a flow channel along its width. The flow channel communicates with the yoke ventilation channel to form a cooling ventilation channel within the magnetic pole coil. A guide vane is installed at the outlet of the yoke ventilation channel, dividing the outlet into two outlet channels. These two outlet channels are adjacent to the inlets of the corresponding cooling ventilation channels within the magnetic pole coils. Thus, the air entering the yoke ventilation channel can be divided into two streams and blown into the corresponding cooling ventilation channels within the magnetic pole coils, cooling the magnetic pole coils and achieving a cooling effect.

[0033] However, in the existing technology, the low installation accuracy of the air guide vanes results in differences in the cross-section of the separated magnetic yoke ventilation channels. Consequently, the airflow and air pressure of the cooling air blown onto the magnetic pole coils are different, leading to temperature differences between the magnetic pole coils and affecting the performance of the salient pole motor.

[0034] To address the shortcomings of existing technologies, this application proposes an air guiding structure, a magnetic yoke assembly, and a salient-pole motor. The air guiding structure is installed within a magnetic yoke ventilation channel formed by the magnetic yoke plates. The magnetic yoke assembly includes magnetic yoke plates and the air guiding structure. The salient-pole motor includes the magnetic yoke assembly.

[0035] To clearly explain the air guiding structure proposed in the embodiments of this application, before providing specific examples, the terminology that may be used in the embodiments of this application is explained:

[0036] Radial airflow guiding structures are applied within the yoke assembly. The yoke assembly is mounted on the rotor support, the diameter direction of which is defined as radial.

[0037] The thickness direction is perpendicular to the plane of the rotor support used to support the yoke assembly.

[0038] Circumferential direction: the circumferential direction of the rotor support.

[0039] In the specific implementation process, the cooling air flows radially from the inside out on the air inlet and air outlet sides; the inner side of the magnetic yoke is defined as the air inlet side, and the outer side of the magnetic yoke is defined as the air outlet side.

[0040] The leeward side is positioned opposite the windward side of the air guide vane, facing the air outlet side. The windward side is the side of the air guide vane that faces the air inlet side.

[0041] Specifically, this application first proposes an air guiding structure 100. Figure 1As shown, it includes: an air guide plate 110 and a positioning block 120, with the positioning block 120 connected to the air guide plate 110. The positioning block 120 is used for mounting and positioning the air guide structure 100 and the magnetic yoke plate 200, so that after the air guide structure 100 is installed and fixed onto the magnetic yoke plate, the air guide plate 110 is positioned at the air outlet of the magnetic yoke ventilation duct S formed by the magnetic yoke plate 200, and the magnetic yoke ventilation duct S is divided into a first air outlet channel S1 and a second air outlet channel S2 with the same cross-sectional area at the same radial position.

[0042] In the specific implementation process, combined with Figure 2 and Figure 8 As shown, the positioning block 120 is installed on the preset mounting portion 200a of the connecting magnetic yoke piece 200. The preset mounting portion 200a is a structure on the magnetic yoke piece 200 that fits into the positioning block 120. After the positioning block is installed on the preset mounting portion 200a, the air guide plate 110 is disposed at the air outlet of the magnetic yoke ventilation duct S formed by at least two of the magnetic yoke pieces 200, thereby dividing the magnetic yoke ventilation duct S into a first air outlet channel S1 and a second air outlet channel S2 with the same cross-sectional area at the same radial position. Therefore, in practical applications, air enters the first air outlet channel S1 and the second air outlet channel S2 under the guidance of the air guide vane 110. The air pressure and air volume are the same in the first and second air outlet channels, and the air pressure and air volume in the flow channel entering the magnetic pole coil 300 are also the same. As a result, the cooling effect on the magnetic pole coil is consistent, which reduces the temperature difference between the magnetic pole coils. This overcomes the technical problem in the prior art where the air guide vane 110 has low installation accuracy, resulting in differences in the cross-section of the separated magnetic yoke ventilation channel S, which in turn leads to different air volume and air pressure of the cooling air blown to the magnetic pole coil, causing temperature differences between the magnetic pole coils and affecting the performance of the salient pole motor.

[0043] It should be noted that, Figure 1 As shown, the air guide plate 110 generally has a symmetrical structure in the shape of a V, U, or figure eight. Each magnetic yoke plate 200 is provided with a preset mounting portion 200a. The positioning block 120 is mounted on the preset mounting portion 200a so that the air guide plate 110 can divide each magnetic yoke ventilation duct S into a first air outlet channel and a second air outlet channel with the same cross-sectional area at the same radial position. In this embodiment, the first air outlet channel and the second air outlet channel are jointly defined by the magnetic yoke plate 200 and the air guide plate 110.

[0044] Furthermore, the air guide vane 110 includes a first air guide arm, a top end, and a second air guide arm. The first air guide arm is integrally connected to the top end and the second air guide arm. Figure 1 As shown, the top end is an arc structure with a radius of R10-R100. The first and second guide arms are arranged symmetrically about the center line of the top end. Figure 1As shown, the included angle A between the first guide arm and the second guide arm is set to 30° to 70°.

[0045] In some embodiments, a through-hole (not shown) is provided at the top, penetrating both the leeward and windward sides. In this structure, air can pass through the through-hole and enter the gap between the two magnetic pole coils to cool the outer surface of the magnetic pole coils, further improving the cooling effect. At this time, the air vented into the yoke is divided into three paths: the first path enters the internal flow channel of the magnetic pole coil through the first air outlet channel; the second path enters the internal flow channel of the other magnetic pole coil through the second air outlet channel; and the third path enters the gap between the two magnetic pole coils through the through-hole.

[0046] Furthermore, since there are multiple magnetic pole coils, these coils are spaced apart circumferentially along the rotor support. There are also multiple magnetic yoke ventilation ducts S, spaced apart circumferentially along the rotor support, corresponding to the flow channels of the magnetic pole coils. To ensure consistent cooling of the magnetic pole coils, multiple air guide vanes 110 are also provided, each correspondingly installed within a magnetic yoke ventilation duct S. In practice, each magnetic yoke ventilation duct S is equipped with this air guide structure 100, ensuring consistent airflow and pressure within the flow channels of each magnetic pole coil. This results in consistent cooling of each magnetic pole coil, reducing temperature differences between them and effectively improving the performance of the salient-pole motor. Since the magnetic yoke 200 is produced in batches, the positional deviation of the preset mounting part 200a can be within a reasonable range during processing, so as to ensure that when the positioning block 120 is connected to the preset mounting part 200a, the installation position of each air guide 110 has a high degree of consistency, so that the air guide 110 can divide each magnetic yoke ventilation channel S into a first air outlet channel and a second air outlet channel with the same cross-sectional area at the same radial position.

[0047] It should be noted that the air guide vane 110 can generally be designed as a hollow structure to reduce its weight and material usage, while also improving its rigidity. The fillet radius at the top of the air guide vane 110 is generally R10-R100. The air guide vane 110 and the positioning block 120 are separate structures, but they are fixed together using methods such as welding, snap-fit, threaded connection, and plug-in connection. Generally, the air guide vane 110 and the positioning block 120 are welded together.

[0048] Furthermore, in some embodiments, the air guide structure 100 is a symmetrical structure, with the centerline of the positioning block 120 coinciding with the centerline of the air guide plate 110. The centerline of the preset mounting portion 200a of the magnetic yoke plate 200 is arranged parallel to the centerline of the positioning block 120 and the centerline of the air guide plate 110, so that when the air guide structure 100 is installed in the magnetic yoke ventilation duct S, the first air outlet channel and the second air outlet channel formed have the same cross-sectional area in the same radial direction.

[0049] It should be noted that, under normal circumstances, the cross-sectional area of ​​the first air outlet channel S1 and the second air outlet channel S2 gradually decreases from the air inlet side to the air outlet side in the radial direction, so that the air entering the flow channel in the magnetic pole coil has a certain air pressure, increasing the air flow dynamics in the flow channel.

[0050] Combination Figure 3 and 4 As shown, after the air guide structure 100 is installed in the magnetic yoke ventilation duct S, it will be subjected to centrifugal force F when the rotor support rotates. rω Centrifugal force can cause the air guide structure 100 to tend to move radially outward, making it prone to loosening. Therefore, as an optional implementation of the above embodiment, Figure 3 and Figure 6 As shown, the positioning block 120 has a first side surface 120a and a second side surface 120b arranged opposite each other in the circumferential direction, and a first end surface 120c and a second end surface 120d arranged opposite each other in the radial direction; the first end surface 120c is arranged towards the air inlet side of the air guide structure 100, and the second end surface 120d is arranged towards the air outlet side of the air guide structure 100; wherein, the first angle and the second angle formed by the first side surface 120a and the second side surface 120b with the first end surface 120c are both acute angles, and the third angle and the fourth angle formed by the first side surface 120a and the second side surface 120b with the second end surface 120d are both obtuse angles.

[0051] After the air guide structure 100 is installed on the magnetic yoke ventilation duct S, the first end face 120c is positioned facing the inner side of the magnetic yoke, and the second end face 120d is positioned facing the outer side of the magnetic yoke. The first end face 120c, the first side face 120a, and the second side face 120b are in close contact with the preset mounting portion 200a of the positioning block 120.

[0052] When the rotor support rotates Figure 4 As shown, the first end face 120c, the first side face 120a, and the second side face 120b of the positioning block 120 will be subjected to a supporting force F from the magnetic yoke 200. n1 F n2 and F n3 And the frictional force F that the positioning block 120 experiences on the first side 120a and the second side 120b respectively. f1 and F f2 F n2 It can be decomposed into a radial component F n2r and F in the tangential direction n2t F n3 The radial component of the force can be decomposed into F. n3r and the component force F in the tangential direction n3t Ff1 It can be decomposed into a radial component F f1r and F in the tangential direction f1t F f2 It can be decomposed into a radial component F f2r and F in the tangential direction f2t .

[0053] Since the first and second included angles formed by the first side surface 120a and the second side surface 120b with the first end face 120c are both acute angles, and the third and fourth included angles formed by the first side surface 120a and the second side surface 120b with the second end face 120d are both obtuse angles, that is, the radial components of the normals of the first side surface 120a and the second side surface 120b point towards the air inlet side.

[0054] In the radial direction, the resultant force F on the positioning block 120 r for:

[0055] F r =F rω +F n1 -F n2r -F n3r -F f1r -F f2r

[0056] It can be seen that, according to the structure of the positioning block 120 proposed in the embodiment of this application, the positioning block 120 is subjected to a smaller resultant force in the radial direction, which can reduce the tendency of the air guide structure 100 to move in the radial direction due to the influence of centrifugal force on the rotation of the rotor support, and thus the air guide structure 100 is less likely to become loose.

[0057] In the tangential direction, the resultant force F on the positioning block 120 t for:

[0058] F t =F n2t -F n3t -F f1t +F f2t

[0059] It can be seen that, in order to avoid the positioning block 120 (guide structure) from having a tendency to move in the tangential direction, the positioning block 120 can be made into a symmetrical structure. In this case, because the positioning block 120 has a symmetrical structure, numerically, F... n2t =F n3t ;F f1t =F f2t Therefore, the net force on the positioning block 120 in the tangential direction is 0.

[0060] Therefore, as an optional implementation of the above embodiments, the first included angle and the second included angle are equal, and the third included angle and the fourth included angle are equal; at this time, the positioning block 120 has a symmetrical structure, and when the air guide structure 100 is driven to rotate by the rotor support, the resultant force on the positioning block 120 in the tangential direction is 0, and it can remain stationary relative to the magnetic yoke 200 in the tangential direction. Generally, the first end face 120c and the second end face 120d are arranged in parallel, that is, the first included angle and the third included angle are complementary angles.

[0061] Furthermore, to facilitate the fabrication of the positioning block 120, the first side surface 120a, the second side surface 120b, and the first end surface 120c are all planar. And generally, the second end surface 120d is also planar. Fabricating the first side surface 120a, the second side surface 120b, the first end surface 120c, and the second end surface 120d as planar also ensures a higher degree of symmetry in the fabricated positioning block 120.

[0062] It should be explained that the equality of the first included angle and the second included angle, and the equality of the third included angle and the fourth included angle, can be understood as follows: when the positioning block 120 is orthographically projected onto the rotor support, the positioning block 120 is an isosceles trapezoid, with its two sides being the projections of the first side surface 120a and the second side surface 120b, its upper base being the projection of the second end face 120d, and its lower base being the projection of the first end face 120c. In the scheme of this application embodiment, the force analysis of the positioning block 120 is based on the analysis of the positioning block 120 under the orthographic projection of the rotor support.

[0063] As an optional implementation of the above embodiments, Figure 3 As shown, the positioning block 120 has a connecting hole 120e that passes through the first end face 120c and the second end face 120d. Generally, the connecting hole 120e is a threaded hole. After the positioning block 120 is installed in the preset mounting part 200a, a threaded component is screwed into the threaded hole of the positioning block 120 and presses against the magnetic yoke 200, so that the positioning block 120 is in close contact with the magnetic yoke 200 through the first end face 120c, the first side face 120a, and the second side face 120b.

[0064] Furthermore, since the first and second included angles formed by the first side 120a and the second side 120b with the first end face 120c are both acute angles, and the third and fourth included angles formed by the first side 120a and the second side 120b with the second end face 120d are both obtuse angles, the resultant force on the positioning block 120 in the radial direction is smaller. This reduces the tendency of the air guide structure 100 to move radially due to the influence of centrifugal force caused by the rotation of the rotor support. The threaded connection is also less likely to loosen, which improves the connection firmness between the positioning block 120 and the magnetic yoke 200, and makes the air guide structure 100 more stable.

[0065] Since the magnetic yoke ventilation duct S is formed by stacking two adjacent magnetic yoke plates 200 layers in thickness, in order to divide the magnetic yoke ventilation duct S into two air outlet channels. Figure 5 As shown, in an optional embodiment of the above example, the air guide plate 110 has a first support surface 110a and a second support surface 110b arranged opposite to each other in the thickness direction. After the positioning block 120 is installed on the preset mounting part 200a, the first support surface 110a and the second support surface 110b respectively abut against two adjacent magnetic yoke plates 200, so that the first air outlet channel S1 and the second air outlet channel S2 are both independent air outlet channels, without cross-flow or air leakage. In specific implementation, the first support surface 110a and the second support surface 110b are both planar.

[0066] As an optional implementation of the above embodiments, the positioning block 120 protrudes from the first support surface 110a and the second support surface 110b. When the positioning block 120 is installed in the preset mounting portion 200a, since the positioning block 120 protrudes from the first support surface 110a and the second support surface 110b, and the first support surface 110a and the second support surface 110b abut against two adjacent magnetic yoke plates 200 when the air guide structure 100 is installed in the magnetic yoke ventilation duct S, the positioning block 120 will be "hidden" in the preset mounting portion 200a of the magnetic yoke plate 200. The positioning block 120 will not affect the airflow, so that the airflow is smooth.

[0067] Under normal circumstances, Figure 7 As shown, the preset mounting portion 200a is a mounting groove that fits into the positioning block 120. The height of the positioning block 120 protruding from the first support surface 110a and the second support surface 110b is equal to the depth of the mounting groove. Furthermore, the positioning block 120 is "hidden" within the preset mounting portion 200a of the magnetic yoke 200, and the first support surface 110a and the second support surface 110b can respectively abut against two adjacent magnetic yokes 200.

[0068] This application also proposes a magnetic yoke assembly, comprising: at least two magnetic yoke plates 200, wherein the at least two magnetic yoke plates 200 form a magnetic yoke ventilation channel S; each magnetic yoke plate 200 has a preset mounting portion 200a; and an air guiding structure 100; wherein the preset mounting portion 200a is located on the leeward side of the air guiding plate 110. In this application embodiment, the air guiding structure 100 adopts some or all of the technical features of the foregoing embodiments, therefore the magnetic yoke assembly has some or all of the air guiding technical advantages of the foregoing embodiments, which will not be elaborated here.

[0069] In this embodiment, at least two magnetic yoke plates 200 are stacked in the thickness direction. The number of magnetic yoke plates 200 is set according to the power requirements of the motor and is not specifically limited here. A magnetic yoke ventilation channel S is formed between two adjacent magnetic yoke plates 200. Each magnetic yoke ventilation channel S is provided with a preset mounting part 200a near the air outlet for mounting the air guide structure 100. The preset mounting part 200a is located on the leeward side of the air guide plate 110, so that during installation, the positioning block 120 is located on the leeward side of the air guide plate 110 and does not affect the airflow.

[0070] Since the magnetic yoke ventilation duct S is formed by stacking two magnetic yoke plates 200 that are adjacent in thickness, in order to divide the magnetic yoke ventilation duct S into two air outlet channels, as an optional embodiment of the above embodiment, the preset mounting part 200a is a mounting groove, and the positioning block 120 is embedded in the mounting groove, so that the first support surface 110a and the second support surface 110b of the air guide plate 110 respectively abut against the two adjacent magnetic yoke plates 200 in the thickness direction.

[0071] The air guide plate 110 has a first support surface 110a and a second support surface 110b arranged opposite each other in the thickness direction. The positioning block 120 protrudes from the first support surface 110a and the second support surface 110b. After the positioning block 120 is installed in the mounting groove, the first support surface 110a and the second support surface 110b abut against two adjacent magnetic yoke plates 200 in the thickness direction, so that the first air outlet channel S1 and the second air outlet channel S2 are independent air outlet channels, without cross-contamination or air leakage. In specific implementation, both the first support surface 110a and the second support surface 110b are planar.

[0072] Normally, the preset mounting portion 200a is a mounting groove that fits into the positioning block 120. The height of the positioning block 120 protruding from the first support surface 110a and the second support surface 110b is equal to the depth of the mounting groove. Furthermore, the positioning block 120 is "hidden" within the preset mounting portion 200a of the magnetic yoke 200, and the first support surface 110a and the second support surface 110b can respectively abut against two adjacent magnetic yokes 200.

[0073] As an optional implementation of the above embodiments, Figure 7As shown, the mounting groove has a first side groove surface 200a-1 and a second side groove surface 200a-2 arranged opposite each other in the circumferential direction. The distance between the first side groove surface 200a-1 and the second side groove surface 200a-2 gradually decreases radially from the air inlet side to the air outlet side. When the positioning block 120 is installed in the mounting groove, the first side surface 120a is in close contact with the first side groove surface 200a-1, and the second side surface 120b is in close contact with the second side groove surface 200a-2. The mounting groove also has a third side groove surface 200a-3, which is in close contact with the first end surface 120c of the positioning block 120. When the rotor support rotates, the first end surface 120c, the first side surface 120a, and the second side surface 120b of the positioning block 120 are respectively subjected to a supporting force F provided by the magnetic yoke 200. n1 F n2 and F n3 And the frictional force F that the positioning block 120 experiences on the first side 120a and the second side 120b respectively. f1 and F f2 F n2 It can be decomposed into a radial component F n2r and F in the tangential direction n2t F n3 The radial component of the force can be decomposed into F. n3r and the component force F in the tangential direction n3t F f1 It can be decomposed into a radial component F f1r and F in the tangential direction f1t F f2 It can be decomposed into a radial component F f2r and F in the tangential direction f2t .

[0074] Since the first and second included angles formed by the first side surface 120a and the second side surface 120b with the first end face 120c are both acute angles, and the third and fourth included angles formed by the first side surface 120a and the second side surface 120b with the second end face 120d are both obtuse angles, that is, the radial components of the normals of the first side surface 120a and the second side surface 120b point towards the air inlet side.

[0075] In the radial direction, the resultant force F on the positioning block 120 r for:

[0076] F r =F rω +F n1 -F n2r -F n3r -F f1r -F f2r

[0077] It can be seen that, according to the structure of the positioning block 120 proposed in the embodiment of this application, the positioning block 120 is subjected to a smaller resultant force in the radial direction, which can limit the tendency of the air guide structure 100 to move in the radial direction due to the influence of centrifugal force on the rotation of the rotor support, and thus the air guide structure 100 is not easy to become loose.

[0078] Combination Figure 8 As shown, the assembly process of the magnetic yoke assembly can be as follows:

[0079] An air guide structure 100 and a magnetic yoke 200 are provided. The positioning block 120 of the air guide structure 100 is embedded into a pre-installed portion 200a of a magnetic yoke, such that the first support surface 110a of the air guide 110 is in close contact with the magnetic yoke 200. The pre-installed portion 200a of another magnetic yoke 200 is aligned with the positioning block 120, and the pre-installed portion 200a of the other magnetic yoke 200 is assembled with the positioning block 120, such that the second support surface 110b is in close contact with the other magnetic yoke 200. The positioning block and the two magnetic yokes 200 are locked together using threaded fasteners.

[0080] Based on any of the magnetic yoke components proposed in the above embodiments, this application also proposes a salient pole motor. This salient pole motor includes a magnetic yoke component. Since the magnetic yoke component employs at least some or all of the techniques described in the foregoing embodiments, the salient pole motor possesses at least some or all of the technical advantages described in the foregoing embodiments, which will not be elaborated upon here.

[0081] The above provides a detailed description of the air guiding structure, magnetic yoke assembly, and salient pole motor provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An air guiding structure, characterized in that, include: The air guide plate and the positioning block are connected to the air guide plate. The positioning block is used for the installation and positioning of the air guide structure and the magnetic yoke plate, so that after the air guide structure is installed and fixed on the magnetic yoke plate, the air guide plate is positioned at the air outlet of the magnetic yoke ventilation channel formed by the magnetic yoke plate, and the magnetic yoke ventilation channel is divided into a first air outlet channel and a second air outlet channel with the same cross-sectional area at the same radial position. The positioning block has a first side surface and a second side surface that are arranged opposite each other in the circumferential direction, and a first end surface and a second end surface that are arranged opposite each other in the radial direction; the first end surface is arranged facing the air inlet side of the air guide structure, and the second end surface is arranged facing the air outlet side of the air guide structure. Wherein, the first angle and the second angle formed by the first side and the second side with the first end face are both acute angles, and the third angle and the fourth angle formed by the first side and the second side with the second end face are both obtuse angles. The air guide plate has a first support surface and a second support surface that are arranged opposite to each other in the thickness direction; the first support surface and the second support surface are respectively used to abut against magnetic yoke plates that are arranged adjacent to each other in the thickness direction.

2. The air guiding structure as described in claim 1, characterized in that, The first included angle and the second included angle are equal, and the third included angle and the fourth included angle are equal; The first side, the second side, and the first end face are all planar.

3. The air guiding structure as described in claim 2, characterized in that, The positioning block has a connecting hole that passes through the first end face and the second end face.

4. The air guiding structure as described in claim 1, characterized in that, The positioning block protrudes from the first support surface and the second support surface.

5. A magnetic yoke assembly, characterized in that, include: At least two magnetic yoke plates, wherein at least two of the magnetic yoke plates form magnetic yoke ventilation channels; each of the magnetic yoke plates has a pre-set mounting portion; and The air guiding structure according to any one of claims 1 to 4; wherein the positioning block is connected to the preset mounting part so that after the air guiding structure is installed and fixed to the magnetic yoke plate, the air guiding plate is disposed at the air outlet of the magnetic yoke ventilation channel formed by the magnetic yoke plate, and the magnetic yoke ventilation channel is divided into a first air outlet channel and a second air outlet channel with the same cross-sectional area at the same radial position.

6. The magnetic yoke assembly as claimed in claim 5, characterized in that, The preset installation part is an installation groove, and the positioning block is embedded in the installation groove, so that the first support surface and the second support surface of the air guide plate respectively abut against two adjacent magnetic yoke plates in the thickness direction.

7. The magnetic yoke assembly as claimed in claim 6, characterized in that, The mounting groove has a first side groove surface and a second side groove surface arranged opposite each other in the circumferential direction, and the interval between the first side groove surface and the second side groove surface gradually decreases in the radial direction from the air inlet side to the air outlet side.

8. A salient-pole motor, characterized in that, Includes the magnetic yoke assembly as described in claim 5, 6, or 7.

Images