Rotor conveying and heating device and rotor shelling and tandem shaft machining system

Abstract

The utility model discloses a rotor transmission heating device and a rotor shelling and tandem shaft processing system, comprising a rotor transmission unit which at least comprises a conveyor belt; the heating unit comprises a heating furnace cavity, at least one first heating assembly arranged in the heating furnace cavity in the conveying direction of the conveying belt, and at least one second heating assembly located above or below the conveying belt and distributed in the conveying direction of the conveying belt. Wherein each first heating assembly comprises at least one layer of electromagnetic heating coil used for heating the outer layer of the rotor; each second heating assembly at least comprises a heating rod used for being inserted into an inner core hole of the rotor and a linear motion module used for driving the heating rod to do lifting motion. According to the utility model, the heating uniformity of the rotor shelling and shaft stringing processing process can be improved, so that the failure rate of the rotor shelling and shaft stringing processing is reduced.

Description

Technical Field

[0001] The utility model relates to the field of motor processing, in particular to a rotor transmission heating device and a rotor shelling and shaft stringing processing system. Background Art

[0002] A motor generally consists of a rotor, a stator, and a housing. The rotor is an important component of the motor. During the production process of the rotor, it is formed by casting aluminum on a laminated rotor core. After casting aluminum, in order to improve the electrical performance of the rotor, shelling treatment is generally required. Specifically, in an AC asynchronous motor using a cast aluminum rotor, since the expansion coefficient of the main material of the iron core, silicon steel, is about 10.5×10 -5 / ℃, and the preferred cast aluminum material for the cast aluminum rotor is pure aluminum with a purity of more than 99.7%. The expansion coefficient of pure aluminum is about 24×10 -6 / ℃. The difference between the two is relatively large. After the cast aluminum rotor is cooled at high temperature, small gaps will be formed between the iron core and the cast aluminum bars, increasing the contact resistance between the cast aluminum bars and the rotor iron core. If the cast aluminum rotor is used directly without treatment after casting aluminum, it will cause high eddy current loss in the motor, low motor efficiency, and rising working temperature.

[0003] The traditional shelling method is manual operation. The rotor is placed in a heating container, and after heating, it is then placed in cooling water at a certain temperature, and taken out after cooling. The labor intensity of manual work is high, and the production efficiency is low.

[0004] In this regard, the motor rotor shelling system with the publication number CN218526204U completes two processes of shaft stringing and shelling through the cooperation of an induction heating system, a cooling tank, and a robot, with high processing efficiency. However, the heating system it uses is a conventional intermediate frequency electromagnetic induction heating mechanism. For the conventional intermediate frequency electromagnetic induction heating mechanism, it has been found through research that there are the following problems during the heating process of the rotor:

[0005] During the intermediate frequency heating process of rotor shelling, for a cast aluminum rotor with a relatively large diameter and length, the heating process may cause uneven overall heating. Uneven heating of the cast aluminum rotor may cause the external aluminum bars to overheat and melt, the temperature of the internal central hole to be relatively low, or the inner hole to deform due to uneven heating of the upper and lower parts of the cast aluminum rotor, resulting in the failure of the shaft stringing processing of the rotor.

[0006] Therefore, in view of the problem of the failure of shaft stringing processing that may be caused by uneven heating of the rotor during the existing rotor shelling and shaft stringing processing, it is necessary to optimize and improve the heating device of the rotor. Summary of the Utility Model

[0007] The first object of the utility model is to provide a rotor transmission heating device to solve the technical problem of improving the uniformity of rotor heating.

[0008] The second object of the present utility model is to provide a rotor shelling and shaft stringing processing system to solve the technical problem of reducing the failure rate of rotor shelling and shaft stringing processing.

[0009] The rotor transmission and heating device of the present utility model is realized as follows:

[0010] A rotor transmission and heating device includes:

[0011] A rotor transmission unit, which at least includes a conveyor belt; and

[0012] A heating unit, which includes a heating furnace cavity, at least one first heating component arranged along the conveying direction of the conveyor belt in the heating furnace cavity, and at least one second heating component located above or below the conveyor belt and distributed along the conveying direction of the conveyor belt; wherein

[0013] Each of the first heating components includes at least one layer of electromagnetic heating coils for heating the outer layer of the rotor; each of the second heating components at least includes a heating rod for inserting into the inner core hole of the rotor and a linear motion module for driving the heating rod to perform a lifting motion.

[0014] In an optional implementation case of the present utility model, each of the first heating components includes a double-layer electromagnetic heating coil; and

[0015] The double-layer electromagnetic heating coils together form a channel suitable for the rotor on the conveyor belt to pass through.

[0016] In an optional implementation case of the present utility model, the double-layer electromagnetic heating coil is in a U shape or a ring shape structure.

[0017] In an optional implementation case of the present utility model, each layer of the electromagnetic heating coil is made of a hollow copper tube.

[0018] In an optional implementation case of the present utility model, two first heating components are arranged along the conveying direction of the conveyor belt in the heating furnace cavity; and

[0019] The number of turns of the electromagnetic heating coils used in the two first heating components shows an increasing trend along the conveying direction of the conveyor belt.

[0020] In an optional implementation case of the present utility model, each of the second heating components is arranged below the conveyor belt; and

[0021] The conveyor belt is provided with rotor slots at intervals for embedding one by one rotors, and the end surface of the conveyor belt facing the heating component is provided with through holes communicating with the rotor slots and suitable for the heating rods to pass through.

[0022] In an optional implementation of the present utility model, each of the second heating components further includes a heating base connected to the heating rod;

[0023] The heating base and the heating rod are both provided with heating devices; and

[0024] The linear motion module is connected to the heating base.

[0025] The rotor shelling and shaft stringing processing system of the utility model is realized as follows:

[0026] A rotor shelling and shaft stringing processing system, comprising: the rotor transmission heating device, shaft stringing tooling, manipulator and cooling device; wherein

[0027] The robot is used to transfer the rotor in the conveyor belt to the shaft stringing tooling, to sleeve the rotor on the rotor shaft to form a rotor assembly, and to transfer the rotor assembly on the shaft stringing tooling to a cooling device.

[0028] In an optional implementation of the present invention, the shaft stringing tooling includes a positioning bracket and a positioning member provided on the positioning bracket for loading the rotor shaft.

[0029] In an optional implementation of the present invention, the cooling device includes a cooling pool and a cooling liquid built into the cooling pool.

[0030] By adopting the above technical scheme, the utility model has the following beneficial effects: for the rotor transmission heating device and the rotor shelling and shaft stringing processing system of the utility model, for the heating process of the rotor, the outer layer of the rotor is heated by the first heating component, and then the inner core hole of the rotor is heated by the second heating component, thereby improving the rotor processing efficiency and the uniformity of the overall heating of the rotor, thereby avoiding the problem of shaft stringing processing failure caused by deformation of the inner hole due to uneven heating of the rotor, and thus improving the accuracy of the rotor shaft stringing processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the rotor transmission heating device of the utility model;

[0032] Figure 2 It is a structural schematic diagram of the first heating component of the rotor transmission heating device of the utility model;

[0033] Figure 3 It is a structural schematic diagram of the second heating assembly of the rotor transmission heating device of the utility model;

[0034] Figure 4 It is a structural schematic diagram of the rotor shelling and shaft stringing processing system of the utility model;

[0035] Figure 5 This is a schematic structural diagram of the shafting tooling for the rotor shelling and shafting processing system of the present utility model.

[0036] In the figure: conveyor belt 1, rotor groove 11, through hole 12, heating furnace cavity 2, inlet 21, outlet 22, electromagnetic heating coil 3, channel 31, heating rod 41, heating base 42, heating device 43, linear motion module 45, infrared temperature detection device 5, positioning bracket 61, positioning part 62, manipulator 7, cooling device 8, rotor 91, rotor shaft 92. Specific embodiments

[0037] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the accompanying drawings.

[0038] Embodiment 1:

[0039] Please refer to Figures 1 to 3 As shown, this embodiment provides a rotor transmission heating device, including: a rotor transmission unit and a heating unit used in cooperation.

[0040] The rotor transmission unit at least includes a conveyor belt 1, and the conveyor belt 1 is also connected with a power structure for driving its operation. Here, the conveyor belt 1 and the power structure can optionally adopt mature means in the prior art, that is, as long as the conveyor belt 1 that can meet the transmission requirement of the rotor 91 satisfies the use requirement of this embodiment. Of course, here, in order to facilitate the reliable loading of the rotor 91 on the conveyor belt 1, the conveyor belt 1 is provided with rotor grooves 11 at intervals for embedding one by one rotor 91.

[0041] Next, the heating unit will be described. It includes a heating furnace cavity 2, at least one first heating component arranged in the heating furnace cavity 2 along the transmission direction of the conveyor belt 1, and at least one second heating component located above or below the conveyor belt 1 and distributed along the transmission direction of the conveyor belt 1. Here, the conveyor belt 1 passes through the heating furnace cavity 2 along the linear transportation direction. For this, an inlet 21 suitable for the conveyor belt 1 to penetrate is formed on one side wall of the heating furnace cavity 2, and an outlet 22 suitable for the conveyor belt 1 to penetrate is formed on the other side wall.

[0042] Based on the above situation, furthermore, taking the example of designing two first heating components and one second heating component in the heating furnace cavity 2 in combination with the accompanying drawings.

[0043] Specifically, each first heating component includes at least one layer of electromagnetic heating coil 3 for heating the outer layer of the rotor 91. The number of turns of the electromagnetic heating coils 3 used in the two first heating components shows an increasing trend along the conveying direction of the conveyor belt 1. For the electromagnetic heating coil 3, the fewer the number of turns, the slower the heating, and the more the number of turns, the faster the heating speed and the better the temperature rise effect. Therefore, for the two first heating components designed in this embodiment, the rotor 91 first passes through the electromagnetic heating coil 3 with slower heating and then through the electromagnetic heating coil 3 with faster heating, so that a gradual temperature rise can be achieved during the temperature rise process of the rotor 91.

[0044] Furthermore, each first heating component includes a double-layer electromagnetic heating coil 3; and the double-layer electromagnetic heating coils 3 together form a channel 31 suitable for the rotor 91 on the conveyor belt 1 to pass through. In terms of the general shape, the double-layer electromagnetic heating coil 3 is in a U shape or a ring shape structure. The double-layer electromagnetic heating coils 3 work together to gradually heat the rotor 91 to the specified temperature and improve the heating efficiency.

[0045] Here, in an optional implementation case, each layer of the electromagnetic heating coil is made of a hollow copper tube. This structure facilitates passing pure water through the inside of the electromagnetic heating coil when it is necessary to cool the electromagnetic heating coil.

[0046] Next, it should be noted that the second heating component includes a heating rod 41 for inserting into the inner core hole of the rotor 91 (this inner core hole is used for assembling with the rotor shaft 92) and a linear motion module 45 for driving the heating rod 41 to move up and down.

[0047] Based on this situation, taking an optional case as an example in combination with the attached drawings, the second heating component is arranged below the conveyor belt 1; for this purpose, the end face of the conveyor belt 1 facing the heating component is provided with a through hole 12 that communicates with the rotor groove 11 and is suitable for the heating rod 41 to pass through.

[0048] In addition, the second heating component further includes a heating base 42 connected to the heating rod 41; heating devices 43 are provided in both the heating base 42 and the heating rod 41; and the linear motion module 45 is connected to the heating base 42. It should be noted that when the heating base 42 is designed here, the aperture of the through hole should be appropriately enlarged, that is, as long as it is ensured that the rotor 91 will not fall off from the through hole, and the design of the through hole can also realize the heating of the shaft end of the rotor 91 facing the second heating component through the heating base 42, so as to cooperate with the heating rod 41 and the first heating component to jointly improve the heating efficiency and uniformity of the rotor 91.

[0049] Regarding the heating device 43 therein, it can be a heating tube, a heating wire or a heating coil, and this embodiment does not make an absolute limitation thereto. The heating base 42 is mainly used to achieve the heat transfer effect for the heating rod 41. The linear motion module 45 here can optionally adopt a lifting cylinder, or other linear motion modules 45 that can realize the lifting motion of the heating base 42 and the heating rod 41, and this embodiment does not make an absolute limitation thereto.

[0050] It should be noted that in order to meet the usage requirements of the second heating component in this embodiment, during the process of the conveyor belt 1 conveying the rotor 91, when each rotor 91 is directly opposite to the second heating component, the conveyor belt 1 stops running, that is, the conveyor belt 1 stops, and the second heating component rises, so that the heating rod 41 of the second heating component can be inserted into the inner core hole of the rotor 91 to achieve the heating of the rotor 91. After the second heating component completes the heating operation on the rotor 91, the second heating component descends. At this time, the conveyor belt 1 resumes its running state.

[0051] In addition, in an optional implementation case, in order to facilitate the precise control of the heating effect of the rotor 91, an infrared temperature detection device 5 is provided at the outlet 22 position of the heating furnace chamber 2 suitable for the conveyor belt 1 to pass through, for detecting the temperature of the rotor 91, and the manipulator 7 removes the defective rotors 91 with too high or too low temperature.

[0052] In summary, for the rotor transmission heating device of this embodiment, the two processes of shafting and shelling only require one heating, which reduces the operation cycle and improves the production efficiency. During the process of shafting and shelling processing, the processing efficiency of the rotor 91 can be improved while the overall heat reception uniformity of the rotor 91 is improved, thereby avoiding the problem of shafting processing failure caused by the inner hole deformation due to the uneven heat reception of the rotor 91, and further improving the precision of the shafting processing of the rotor 91.

[0053] Embodiment 2:

[0054] Please refer to Figures 1 to 5 As shown, on the basis of the rotor transmission heating device of Embodiment 1, this embodiment provides a rotor shelling and shafting processing system, including: the rotor transmission heating device of Embodiment 1, a shafting tooling, a manipulator 7 and a cooling device 8. The manipulator 7 therein is used to transfer the rotor 91 on the conveyor belt 1 to the shafting tooling, sleeve the rotor 91 on the rotor shaft 92 pre-placed in the shafting tooling to form a rotor assembly, and is used to transfer the rotor assembly on the shafting tooling to the cooling device 8.

[0055] The manipulator 7 here can optionally adopt any mature means of the existing technology, that is, any manipulator 7 that can realize the clamping, transfer and release of workpieces can meet the usage requirements of the rotor 91 transfer in this embodiment.

[0056] Regarding the shafting tooling and the cooling device 8 adopted in this embodiment, any mature means in the prior art can also be used, and the structure is not absolutely limited in this embodiment.

[0057] Generally speaking, the shafting tooling includes a positioning bracket 61 and a positioning member 62 provided on the positioning bracket 61 for loading the rotor shaft 92. The positioning member 62 ensures the assembly accuracy of the rotor 91 and the rotor shaft 92, and speeds up the operation speed.

[0058] The cooling device 8 includes a cooling pool and a cooling liquid built in the cooling pool. It should be noted that the cooling liquid in the cooling device 8 here can be pure water, or pure water and saponified oil. The manipulator 7 places the combined body after the rotor 91 and the rotor shaft 92 are assembled in place into the cooling liquid in the cooling pool; at this time, the temperature of the rotor 91 is about 540 °C, and the huge temperature difference causes the aluminum squirrel cage bars and silicon steel on the rotor 91 to contract. Aluminum has a larger shrinkage rate than silicon steel, so an air gap is formed between the squirrel cage bars and the bottom of the slot of the rotor 91. The surface and bottom of the slot of the squirrel cage bars will accelerate the formation of an oxide film due to high temperature, which increases the contact resistance, thereby reducing the stray loss of the rotor 91 and improving the motor efficiency. The inner core hole of the rotor 91 shrinks and tightly combines with the rotor shaft 92, which has the effect of "holding tightly" the rotor shaft 92 and increasing the friction force. The rotor 91 is taken out after cooling in the cooling pool for 30 minutes and placed at room temperature for 1-2 hours to evaporate the water on the surface using the remaining heat inside.

[0059] In the above specific embodiments, the purpose, technical solution and beneficial effects of the present invention are further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0060] In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0061] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0063] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0064] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being below, under, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

Claims

1. A rotor transmission heating device, characterized in that, Comprising: A rotor transmission unit, which at least includes a conveyor belt; and A heating unit, which includes a heating furnace cavity, at least one first heating component arranged along the conveying direction of the conveyor belt in the heating furnace cavity, and at least one second heating component located above or below the conveyor belt and distributed along the conveying direction of the conveyor belt; wherein Each of the first heating components includes at least one layer of electromagnetic heating coils for heating the outer layer of the rotor; each of the second heating components at least includes a heating rod for inserting into the inner core hole of the rotor and a linear motion module for driving the heating rod to perform a lifting motion.

2. The rotor transmission heating device according to claim 1, wherein Each of the first heating components includes a double-layer electromagnetic heating coil; and The double-layer electromagnetic heating coils together form a channel suitable for the rotor on the conveyor belt to pass through.

3. The rotor transmission heating device according to claim 2, wherein The double-layer electromagnetic heating coil is in a U shape or a ring shape structure.

4. The rotor transmission heating device according to any one of claims 1 to 3, characterized in that, Each layer of the electromagnetic heating coil is made of a hollow copper tube.

5. The rotor transmission heating device according to any one of claims 1 to 3, characterized in that There are two first heating components arranged along the conveying direction of the conveyor belt in the heating furnace cavity; and The number of turns of the electromagnetic heating coils used in the two first heating components shows an increasing trend along the conveying direction of the conveyor belt.

6. The rotor transmission heating device according to claim 1, wherein Each of the second heating components is arranged below the conveyor belt; and The conveyor belt is provided with rotor slots at intervals for embedding one by one rotor, and the end face of the conveyor belt facing the heating component is provided with through holes communicating with the rotor slots and suitable for the heating rods to pass through.

7. The rotor transmission heating device according to claim 1 or 6, characterized in that, Each of the second heating components further includes a heating base connected to the heating rod; Heating devices are provided in both the heating base and the heating rod; and The linear motion module is connected to the heating base.

8. A rotor shell-removing and shaft-stringing processing system, characterized in that, Comprising: The rotor transmission and heating device, the shafting tooling, the manipulator and the cooling device according to any one of claims 1 to 7; Wherein The manipulator is used to transfer the rotor in the conveyor belt to the shafting tooling, sleeve the rotor on the rotor shaft to form a rotor assembly, and transfer the rotor assembly on the shafting tooling to the cooling device.

9. The rotor shell removal and shaft stringing processing system according to claim 8, wherein, The shafting tooling includes a positioning bracket and a positioning member arranged on the positioning bracket for loading the rotor shaft.

10. The rotor shell-removing and shaft-stringing machining system according to claim 8 or 9, characterized in that, The cooling device includes a cooling pool and cooling liquid built in the cooling pool.

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