Permanent magnet conical propulsion motor and vehicle

Abstract

The application discloses a permanent magnet conical propelling motor and a vehicle. The permanent magnet conical propelling motor comprises a stator (2) and a rotor (3) installed in a casing (1), the stator (2) and the rotor (3) are matched with each other through a bearing (6), the rotor (3) is connected with one end of a transmission shaft (5), the other end of the transmission shaft (5) penetrates through the casing (1) and is connected with a propeller, the inner wall of the stator (2) and the outer wall of the rotor (3) are parallel to each other and form a certain angle with the motor axis, and air gaps are distributed between the inner wall of the stator (2) and the outer wall of the rotor (3). The permanent magnet conical propelling motor has the advantages of simple and compact structure, low bearing friction loss, high propelling efficiency, long cruising range and the like, and has stable operation performance, long service life and the like, is suitable for use in different pressure environments and has wide application prospects in various vehicles.

Description

TECHNICAL FIELD

[0001] The application relates to a permanent magnet propulsion motor, in particular to a permanent magnet conical propulsion motor and a vehicle, and belongs to the technical field of propulsion motors. BACKGROUND

[0002] In recent years, sea transportation has developed rapidly, and electric energy is widely used as a new energy source that is more efficient and environmentally friendly. Using electric energy as a power source for propulsion is also an inevitable trend of the development of sea transportation. When the common motor propeller is working, the fluid hinders the propulsion of the propeller, forcing the bearings between the stator and the rotor to bear a large force, which seriously wears the bearings. In addition, due to the friction between the stator and the rotor bearings, the noise of the motor propeller is difficult to suppress. Although the optimization of the control of the motor can reduce the noise to a certain extent, the structure is not fundamentally improved, so the effect is not ideal. SUMMARY

[0003] The main purpose of the application is to provide a permanent magnet conical propulsion motor and a vehicle to overcome the shortcomings of the prior art.

[0004] To achieve the above-mentioned purposes, the technical scheme adopted by the application comprises:

[0005] Some embodiments of the application provide a permanent magnet conical propulsion motor, which comprises a stator and a rotor installed in a casing, the stator and the rotor are matched with each other through bearings, the rotor is connected with one end of a transmission shaft, the other end of the transmission shaft penetrates out of the casing and is connected with a propeller, the inner wall of the stator and the outer wall of the rotor are parallel to each other and also form an included angle greater than 0 and less than 90° with the motor axis, and there is also an air gap between the inner wall of the stator and the outer wall of the rotor.

[0006] In some embodiments, the included angle formed by the inner wall of the stator or the outer wall of the rotor with the motor axis is related to the axial magnetic pull of the motor, and the size ratio of the axial magnetic pull of the motor and the sailing thrust depends on the sailing demand. After determining the required sailing thrust according to the sailing demand, the size of the axial magnetic pull of the motor can be obtained, and then the size of the required included angle can be calculated.

[0007] Wherein, the sailing thrust T i The calculation formula is as follows:

[0008]

[0009] Wherein, p is the fluid density, A0 is the propeller disc area, V A is the propeller sailing speed, u a1 is the propeller disc speed increment, u a is the propeller disc infinite far speed increment.

[0010] The calculation formula of the axial magnetic pull F of the motor is as follows:

[0011] F = 1.225 x 10 6 D AV tg aL eff (β i B δi ) 2

[0012] Wherein, D AV represents the average diameter of the motor rotor, a is the included angle, L eff is the effective length of the motor core, B δi is the maximum value of the i-th gap magnetic flux density, β i is the ratio of the mean square extreme value to the maximum value of the gap magnetic flux density.

[0013] In some embodiments, the propeller includes a multi-blade propeller, and is not limited thereto.

[0014] In some embodiments, the stator includes a coil winding, and the rotor includes a permanent magnet.

[0015] In some embodiments, the coil winding and / or the permanent magnet are externally covered with insulating paint.

[0016] In some embodiments, the coil winding and / or the permanent magnet are internally filled with encapsulating material to form a sealed protective structure.

[0017] In some embodiments, the permanent magnet is provided in a single section or multiple sections, and is not limited thereto.

[0018] In some embodiments, the mounting structure of the permanent magnet includes a surface-mounted or embedded mounting structure, and is not limited thereto.

[0019] In some embodiments, the structure of the coil winding includes a distributed winding structure or a concentrated winding structure, and is not limited thereto.

[0020] In some embodiments, the sealing mechanism of the propulsion motor includes a dynamic sealing mechanism and / or a static sealing mechanism, and is not limited thereto.

[0021] In some embodiments, the casing is further filled with insulating oil.

[0022] In some embodiments, the bearing includes a water-lubricated bearing, an open water-resistant mechanical bearing, or a sealed mechanical bearing, and is not limited thereto.

[0023] In some embodiments, the propulsion motor further includes a speed reducer connected to the transmission shaft.

[0024] The permanent magnet conical propulsion motor provided by the above embodiments of the present application has the advantages that the inner wall of the stator and the outer wall of the rotor form a certain angle with the motor axis, so that not only a rotating torque is generated during normal operation, but also an axial magnetic pull is generated, which can be used to offset the friction of the bearing and the reaction force of the fluid on the propeller.

[0025] Some embodiments of the present application also provide a vehicle, which comprises a vehicle body, and the vehicle body is provided with any one of the aforementioned permanent magnet conical propulsion motors.

[0026] Compared with the prior art, the present application has the advantages of:

[0027] (1) The propulsion efficiency of the permanent magnet conical propulsion motor is greatly improved, and the improvement effect on the influence of the cruising range and the friction loss of the bearing is most obvious, and the noise caused by the bearing friction can be effectively reduced, and the output torque can be improved by setting a speed reducer without changing the overall structure.

[0028] (2) In the permanent magnet conical propulsion motor, the coil winding of the stator and the permanent magnet of the rotor are provided with insulating paint, so that they can be better protected, and further sealed and protected by filling epoxy resin and other materials, which can also weaken the hindrance of fine sand and gravel entering the motor to the stator and rotor, and isolate air to prevent oxygen corrosion, so as to ensure the operation stability and service life of the motor propeller. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The structure diagram of a permanent magnet conical propulsion motor in a typical embodiment of the present application;

[0031] Explanation of reference signs: 1, housing; 2, stator; 3, rotor; 4, multi-blade propeller; 5, transmission shaft; 6, bearing. DETAILED DESCRIPTION

[0032] As described above, in view of the deficiencies of the prior art, the present inventors have long-term research and time to propose the technical solutions of the present application, which will be specifically described below in combination with the drawings and embodiments.

[0033] It should be noted that in the present specification, unless explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0034] Please refer to Figure 1 In an exemplary embodiment of the present application, a permanent magnet conical propulsion motor includes a casing 1, a stator 2 and a rotor 3, the stator 2 and the rotor 3 are cooperatively arranged and located in the casing, and the rotor 3 is connected with a multi-blade propeller 4 through a transmission shaft 5.

[0035] Further, the inner wall of the stator 2 and the outer wall of the rotor 3 are parallel to each other and form a certain angle with the motor axis, and there is also an air gap between the stator 2 and the rotor 3.

[0036] Further, the size of the angle between the inner wall of the stator 2 or the outer wall of the rotor 3 and the motor axis can be determined according to the navigation requirements of the motor. Specifically, according to the navigation requirements of the motor, the navigation thrust (the reaction force of the fluid on the propeller) and its proportion to the axial magnetic pull of the motor can be determined, and the axial magnetic pull is related to the size of the aforementioned angle, so that after the size of the navigation thrust is determined, the size of the aforementioned angle can be obtained through a related formula.

[0037] Wherein, the size of the navigation thrust can be solved by the following formula:

[0038]

[0039] Wherein, p is the fluid density, A0 is the propeller disc area, V A is the propeller navigation speed, u a1 is the propeller disc speed increment, ua The propeller disk face infinite rear speed increment.

[0040] And the aforementioned axial magnetic pull can be calculated by referring to the following formula:

[0041] F=1.225×10 6 D AV tgαL eff (β i B δi ) 2

[0042] Wherein F represents the axial magnetic pull size, D AV represents the average diameter of the motor rotor, α is the aforementioned angle, L eff is the effective length of the motor core, B δi is the maximum value of the i-th air gap magnetic flux density, β i is the ratio of the mean square extreme value to the maximum value of the air gap magnetic flux density.

[0043] More preferably, the inner wall of the stator 2 or the outer wall of the rotor 3 forms an angle with the motor axis, which is greater than 0 and less than or equal to 45°.

[0044] Further, the aforementioned stator 2 includes a coil winding, and the aforementioned rotor 3 includes a permanent magnet. Wherein the outer part of the coil winding and the permanent magnet can be covered with insulating paint, and can be further sealed with materials such as epoxy resin for sealing protection, to weaken or eliminate the hindrance of fine sand entering the motor to the stator and rotor, and to isolate air to prevent oxygen corrosion, etc.

[0045] Further, the propeller motor further comprises a reducer connected with the transmission shaft for improving the torque output.

[0046] Further, the stator 2 and the rotor 3 can be sealed and packaged in the casing 1. The casing 1 and the transmission shaft 5 can be sealed and matched by mechanical dynamic sealing mechanism or other dynamic sealing mechanism and static sealing mechanism, etc.

[0047] The permanent magnet conical propeller motor works, the stator 2 generates a rotating magnetic field, so that the rotor 1 relies on the transmission shaft 5 to drive the multi-leaf propeller 4 to rotate to generate thrust, because the inner wall of the stator 2 and the outer wall of the rotor 3 are parallel and form the same angle with the motor axis, so in addition to generating rotating torque, it will also generate axial magnetic pull, which can be used to offset the size of the friction force, and can also be used to assist the thrust, so as to effectively reduce the bearing friction, effectively improve the overall propulsion efficiency and power density of the machine body. Further, the output torque can be adjusted by changing the reducer at the front end of the transmission shaft 5.

[0048] In the typical embodiment, the coil winding arranged in the stator can adopt, but is not limited to, distributed winding, concentrated winding or other winding methods.

[0049] In the typical embodiment, the permanent magnet arranged in the rotor can be arranged in single section or multiple sections, and the material can be selected from, but is not limited to, various magnetic materials such as cobalt-rare earth boron.

[0050] In the typical embodiment, the mounting method of the permanent magnet can be surface-mounted type, or embedded type or other mounting methods of permanent magnet motor magnet.

[0051] In the typical embodiment, the material of the stator and rotor core can adopt, but is not limited to, various magnetic materials such as silicon steel sheet.

[0052] In the typical embodiment, the power of the propulsion motor can be changed by changing the coil winding distribution method, coil turns, wire diameter of the stator, changing the material of the stator and rotor core, changing the material and volume of the permanent magnet.

[0053] In the typical embodiment, the overall propulsion efficiency can be improved by changing the number, shape and material of the blades of the multi-blade propeller.

[0054] In the typical embodiment, the cooperation between the rotor 3 and the stator 2 can be achieved by various types of bearings, for example, which can be selected from, but is not limited to, water-lubricated bearings, open water-resistant mechanical bearings, sealed mechanical bearings and the like.

[0055] In the typical embodiment, the internal pressure of the motor can be adjusted by filling and discharging insulating oil in the casing 1, and cooperating with pressure balancing devices and the like, to adapt to different water depths.

[0056] In the typical embodiment, the propulsion motor can be a three-phase motor or other multi-phase motor other than three-phase.

[0057] The permanent magnet conical propulsion motor provided by the typical embodiment can be applied to a ship or other vehicle as a propeller. For example, the permanent magnet conical propulsion motor can be arranged at a position below or at the tail of the vehicle, which can effectively alleviate the blockage of fluid.

[0058] The permanent magnet conical propulsion motor provided by the typical embodiment adopts a special stator and rotor structure, which effectively alleviates the friction of the bearing, greatly suppresses the generation of underwater noise, and improves the propulsion efficiency on the basis of ensuring high power density and high efficiency.

[0059] In summary, the permanent magnet conical propulsion motor provided by the typical embodiment has the advantages of simple and compact structure, low bearing friction loss, high propulsion efficiency, long cruising range and the like, and has stable operation performance, long service life and the like, and is suitable for use in different pressure environments, and has a broad application prospect in various vehicles.

[0060] It should be understood that the above description is only a specific embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, several improvements and refinements can also be made, which should also be considered as the protection scope of the present application.

Claims

1. A method for calculating the included angle in a permanent magnet conical propulsion motor, the motor comprising a stator (2) and a rotor (3) installed in a housing (1), the stator (2) and the rotor (3) cooperating with each other via bearings (6), and an air gap distributed between the inner wall of the stator (2) and the outer wall of the rotor (3), the rotor (3) being connected to one end of a drive shaft (5), the other end of the drive shaft (5) extending out of the housing (1) and connected to a propeller; characterized in that: The included angle is the angle formed by the inner wall of the stator (2) and the motor axis. The inner wall of the stator (2) and the outer wall of the rotor (3) are parallel to each other. The included angle is greater than 0 and less than 90°. The calculation method includes: determining the required navigation thrust and the ratio of the axial magnetic pull of the motor to the navigation thrust based on navigation requirements, thereby obtaining the magnitude of the axial magnetic pull of the motor, and then calculating the size of the included angle. Wherein, the propulsion T i The calculation formula is as follows: Where ρ is the fluid density, A0 is the thruster disk area, and V A For the propulsion speed, u a1 u is the velocity increment at the thruster disk. a The velocity increment at infinity behind the thruster disk; The formula for calculating the axial magnetic pull F of the motor is as follows: F1.225×1 6 D AV tgαL eff (β i B δi ) 2 Among them, D AV The average diameter of the motor rotor is represented by α, and L is the included angle. eff For the effective length of the motor core, B δi The maximum value of the air gap magnetic flux density in the i-th segment, β i It is the ratio of the extreme value to the maximum value of the air gap magnetic flux density.

2. The calculation method according to claim 1, characterized in that: The included angle is greater than 0° and less than or equal to 45°.

3. The calculation method according to claim 1, characterized in that: The stator (2) includes coil windings, and the rotor (3) includes permanent magnets.

4. The calculation method according to claim 3, characterized in that: The coil windings and / or permanent magnets are covered with insulating varnish, and the coil windings and / or permanent magnets are also filled with encapsulation material to form a sealed protective structure.

5. The calculation method according to claim 3, characterized in that: The permanent magnet can be configured as a single section or multiple sections.

6. The calculation method according to claim 3, characterized in that: The mounting structure of the permanent magnet includes surface-mount or embedded mounting structures.

7. The calculation method according to claim 3, characterized in that: The structure of the coil winding includes a distributed winding structure or a centralized winding structure.

8. The calculation method according to claim 1, characterized in that: The propeller includes a multi-bladed propeller (4).

9. The calculation method according to claim 1, characterized in that: The sealing mechanism of the propulsion motor includes a dynamic sealing mechanism and / or a static sealing mechanism.

10. The calculation method according to claim 1, characterized in that: The housing (1) is also filled with insulating oil.

11. The calculation method according to claim 1, characterized in that: The bearing (6) includes a water-lubricated bearing, an open water-resistant mechanical bearing, or a sealed mechanical bearing.

12. The calculation method according to claim 1, characterized in that: The propulsion motor also includes a reducer, which is connected to the drive shaft (5).

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