Vertical electric spindle cooling system

Abstract

The utility model discloses a vertical electric spindle cooling system, which belongs to the technical field of electric spindle cooling and comprises a stator, a first end cover and a second end cover. Wherein the stator is connected with the first end cover and the second end cover to form a closed space; the motor further comprises a rotor arranged in the closed space, a first cooling flow channel penetrating through the first end cover and a second cooling flow channel penetrating through the second end cover. And the temperature sensor is used for acquiring the temperature of the cooled cooling liquid. The technical problem that the circulating cooling effect is poor is solved, the machining precision and stability of the electric spindle are improved, and the technical effect of fully cooling the vertical electric spindle cooling system is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric main shaft cooling technical field, concretely relates to a vertical electric main shaft cooling system. BACKGROUND

[0002] In modern mechanical manufacturing process, the error caused by thermal deformation reaches 50%, especially in high-speed high-precision machining, the proportion is higher at 60%~80%. As the key component of high-speed high-precision numerical control machine tool, the performance of electric main shaft directly influences the machining precision of machine tool. Because the electric main shaft motor is built-in and the shell is closed, the heat generated by motor power loss and the heat generated by front and rear bearing friction cannot be effectively exported in time, and a large amount of accumulation is in the shaft core rotor, so that the shaft core bearing rotor part is expanded by heat, and serious thermal deformation is generated, the original gap between parts is changed, and the error is added to the machining center point (TCP), finally the machining precision of electric main shaft is reduced.

[0003] Traditional electric main shaft usually uses cooling liquid (water or oil) to circulate cooling for motor stator and electric main shaft shell, however, the traditional cooling system has poor cooling effect, which easily influences the machining precision and stability of electric main shaft. UTILITARIAN CONTENT

[0004] To solve the above problems, the utility model provides a vertical electric main shaft cooling system in the first aspect, which comprises: a stator, a first end cover and a second end cover connected with the stator respectively;

[0005] The stator is connected with the first end cover and the second end cover to form a closed space.

[0006] It further comprises a rotor arranged in the closed space, a first cooling flow channel penetrating through the first end cover, and a second cooling flow channel penetrating through the second end cover.

[0007] A temperature sensor is arranged for acquiring the temperature of the cooled cooling liquid.

[0008] In some embodiments, the first cooling flow channel comprises a first cooling sub-flow channel and a second cooling sub-flow channel connected with the first cooling sub-flow channel.

[0009] The first cooling sub-flow channel penetrates through the first end cover and is used for guiding the external cooling liquid into the closed space, and the second cooling sub-flow channel has an annular structure and is provided with a through hole at the bottom.

[0010] In some embodiments, the first end cover comprises a first sealing ring, and a first sealing ring is further arranged on the first sealing ring, and the first sealing ring and the first sealing ring are sleeved on the rotor.

[0011] In some embodiments, the second end cover comprises a second sealing ring and a third sealing ring, the third sealing ring is sleeved on the rotor, and the second sealing ring is matched with the third sealing ring.

[0012] In some embodiments, a top of the second sealing ring is provided with a first annular structure, and a bottom of the third sealing ring is provided with a second annular structure, the second annular structure is sleeved on an outer periphery of the first annular structure.

[0013] In some embodiments, the vertical motorized spindle cooling system further comprises a third end cover connected with the stator,

[0014] The third end cover is provided with a containing groove and a third cooling flow channel connected with the containing groove.

[0015] The connecting part of the third end cover and the second end cover is further provided with a second sealing ring.

[0016] By adopting the above technical scheme, the vertical motorized spindle cooling system mainly has the following technical effects:

[0017] By setting the first cooling flow channel to guide the cooling liquid into the vertical motorized spindle cooling system, setting the second cooling flow channel to discharge the cooling liquid, and setting the temperature sensor to obtain the temperature of the cooled cooling liquid, the technical problem of poor circulating cooling effect is solved, the machining precision and stability of the motorized spindle are improved, and the technical effect of fully cooling the vertical motorized spindle cooling system is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a cooling schematic view of the vertical motorized spindle cooling system.

[0019] Figure 2 It is an enlarged view of part A. Figure 1

[0020] Figure 3 It is an enlarged view of part B. Figure 1

[0021] Figure 4 It is an enlarged view of part C. Figure 3

[0022] Among them, the meanings of the reference signs are as follows:

[0023] 1, the stator;

[0024] 2, the first end cover; 21, the first sealing ring; 22, the first sealing ring;

[0025] 3, the second end cover; 31, the second sealing ring; 311, the first annular structure; 32, the third sealing ring; 321, the second annular structure; ​​​

[0026] 4. rotor; 41. rotating shaft; 42. fixing groove;

[0027] 5. First cooling channel; 51. First cooling sub-channel; 52. Second cooling sub-channel;

[0028] 6. Second cooling channel;

[0029] 7. Third end cover; 71. Accommodation groove; 72. Third cooling channel; 73. Second sealing ring. DETAILED DESCRIPTION

[0030] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the specification of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] See also Figures 1-4 The utility model provides a vertical electric spindle cooling system, comprising: a stator 1, a first end cover 2 and a second end cover 3 connected to the top and bottom of the stator 1 respectively; wherein, the stator 1 is connected to the first end cover 2 at the top and the second end cover 3 at the bottom to form a closed space; the electric spindle cooling system also includes a rotor 4 arranged in the closed space, a first cooling flow channel 5 provided through the first end cover 2, and a second cooling flow channel 6 provided through the second end cover 3.

[0033] Furthermore, the stator 1, when connected to the first end cover 2 and the second end cover 3, forms a sealed space, effectively preventing foreign matter from entering the interior of the vertical electric spindle cooling system and preventing mechanical collisions from damaging the internal structure of the vertical electric spindle cooling system, thereby providing excellent protection. The stator 1 is the stationary, fixed portion of the vertical electric spindle cooling system, capable of generating a rotating magnetic field when current is applied; the rotor 4 is the rotating portion of the vertical electric spindle cooling system, capable of generating electromagnetic torque and rotating due to the rotating magnetic field generated by the stator 1, based on electromagnetic induction.

[0034] Furthermore, the rotor 4 is connected to the first end cover 2 and the second end cover 3 respectively via bearings, thereby utilizing the first end cover 2 and the second end cover 3 to secure the rotor 4. In some embodiments, a stepped fixing groove 42 is provided on the rotating shaft 41 of the rotor 4. The rotating shaft 41 is connected to the bearing via the fixing groove 42, thereby preventing the bearing from shifting along the rotating shaft 41 during operation of the vertical electric spindle cooling system. In addition, a circular through-hole is provided in the center of each of the first end cover 2 and the second end cover 3, through which the rotor 4 can pass. This allows the rotor 4 to extend out of the enclosed space through the circular through-hole and connect to other transmission components or parts.

[0035] In some embodiments, the output end of the rotor 4 can be connected to a load such as a milling machine. By directly connecting the rotor 4 to the load, the power loss caused by the gearbox can be reduced compared to connecting the milling machine to the motor through a gearbox. An exemplary power loss can be the energy lost by the gearbox during the transmission process due to internal friction, rotation, vibration, etc., which is dissipated in the form of heat energy, resulting in a decrease in mechanical efficiency.

[0036] Furthermore, the first cooling channel 5 is provided through the first end cover 2. In some embodiments, the first cooling channel 5 is used to introduce coolant into the enclosed space, and the coolant absorbs the heat on the stator 1 and / or the rotor 4, thereby cooling the stator 1 and / or the rotor 4, thereby reducing the temperature inside the vertical electric spindle, and avoiding the stator 1 and / or the rotor 4 from being thermally deformed due to excessive temperature, which affects the machining accuracy of the vertical electric spindle. On the other hand, the machining accuracy and stability of the vertical electric spindle can be improved by improving the machining accuracy and stability of the rotor 4 during operation. Exemplarily, the coolant can be cooling oil, which has the characteristics of being locally non-magnetic, non-flammable, non-conductive and having good thermal conductivity. Using cooling oil as a coolant has no effect on the magnetic circuit of the electric spindle cooling system, and has higher heat dissipation efficiency.

[0037] In some embodiments, the first cooling channel 5 includes: a first cooling sub-channel 51, and a second cooling sub-channel 52 connected to the first cooling sub-channel 51; wherein, the first cooling sub-channel 51 is arranged to pass through the first end cover 2, and is used to introduce external coolant into the closed space; the second cooling sub-channel 52 is an annular structure, and a through hole is provided at the bottom; the coolant entering the first cooling channel 5 first enters the second cooling sub-channel 52 through the first cooling sub-channel 51, and then disperses circumferentially into the closed space through the through holes in the second cooling sub-channel 52, and contacts the stator 1 and / or rotor 4, thereby cooling the stator 1 and / or rotor 4 in the closed space.

[0038] Further, the second cooling flow channel 6 is arranged through the second end cover 3, and in some embodiments, the second cooling flow channel 6 is used to guide the cooling liquid after cooling the stator 1 and / or the rotor 4 in the enclosed space out, so as to realize the circulating cooling process of the cooling liquid.

[0039] In some embodiments, the first end cover 2 further comprises a first sealing ring 21 connected with the first end cover 2, and a first sealing ring 22 arranged on the first sealing ring 21, the first sealing ring 21 and the first sealing ring 22 are sleeved on the rotor 4, and are used to enhance the sealing performance of the connection between the first end cover 2 and the rotor 4.

[0040] In some embodiments, the second end cover 3 further comprises a second sealing ring 31 connected with the second end cover 3, and a third sealing ring 32 sleeved on the rotor 4, the second sealing ring 31 and the third sealing ring 32 are matched, and are used to enhance the sealing performance of the connection between the second end cover 3 and the rotor 4.

[0041] In some more preferred embodiments, the top of the second sealing ring 31 is provided with a first annular structure 311, the bottom of the third sealing ring 32 is provided with a second annular structure 321, and the second annular structure 321 is sleeved on the outer periphery of the first annular structure 311; by designing the second annular structure 321 to be sleeved on the first annular structure 311, when the vertical electric spindle cooling system is working, the cooling liquid will move downward along the second annular structure 321, so as to avoid the cooling liquid entering the connection between the second end cover 3 and the rotor 4, thereby enhancing the sealing performance of the connection between the second end cover 3 and the rotor 4.

[0042] Further, the vertical electric spindle cooling system further comprises a third end cover 7 connected with the stator 1, and in some embodiments, the third end cover 7 is provided with an annular accommodating groove 71 and a third cooling flow channel 72 connected with the outside; wherein the accommodating groove 71 is arranged below the second cooling flow channel 6, and is used to receive the cooled cooling liquid discharged from the second cooling flow channel 6; it should be noted that the cooled cooling liquid refers to the cooling liquid after cooling the stator 1 and / or the rotor 4, and the third cooling flow channel 72 is used to guide the cooled cooling liquid in the accommodating groove 71 out to the outside structure of the vertical electric spindle cooling system.

[0043] In some more preferred embodiments, the connection between the third end cover 7 and the second end cover 3 is further provided with a second sealing ring 73, which is used to enhance the sealing performance of the connection between the third end cover 7 and the second end cover 3.

[0044] Further, the electrospindle cooling system further comprises a temperature sensor, which in some embodiments can be arranged in the accommodating groove 71 or in the third cooling flow channel 72, for obtaining the temperature of the cooled coolant.

[0045] Finally, it should be noted that: the embodiments of the utility model are only the preferred embodiments of the utility model, and are used for explaining the technical scheme of the utility model, but not for limiting it; although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art should understand that; it still can modify the technical scheme recorded in the foregoing each item embodiment, or make equivalent replacement to part of technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and range of the technical scheme of the embodiments of the utility model.

Claims

1. A vertical electric spindle cooling system, characterized in that: include: a stator, a first end cover and a second end cover respectively connected to the stator; Wherein, the stator is connected with the first end cover and the second end cover to form a closed space; Also included is a rotor disposed in the enclosed space, a first cooling channel disposed through the first end cover, and a second cooling channel disposed through the second end cover; Temperature sensor, used to obtain the coolant temperature after cooling.

2. A vertical electric spindle cooling system according to claim 1, characterized in that: The first cooling channel includes: a first cooling sub-channel, and a second cooling sub-channel connected to the first cooling sub-channel; The first cooling sub-channel is arranged to pass through the first end cover and is used to introduce external cooling liquid into the closed space; the second cooling sub-channel is an annular structure, and a through hole is provided at the bottom thereof.

3. The vertical electric spindle cooling system according to claim 1, characterized in that: The first end cover includes: a first sealing ring, a first sealing ring is further provided on the first sealing ring, and the first sealing ring and the first sealing ring are sleeved on the rotor.

4. A vertical electric spindle cooling system according to claim 3, characterized in that: The second end cover includes: a second sealing ring and a third sealing ring. The third sealing ring is sleeved on the rotor. The second sealing ring is adapted to the third sealing ring.

5. A vertical electric spindle cooling system according to claim 4, characterized in that: A first annular structure is provided on the top of the second sealing ring, and a second annular structure is provided on the bottom of the third sealing ring. The second annular structure is sleeved on the outer circumference of the first annular structure.

6. A vertical electric spindle cooling system according to claim 5, characterized in that: Also includes: a third end cover connected to the stator, The third end cover is provided with a receiving groove and a third cooling channel connected to the receiving groove; A second sealing ring is further provided at the connection between the third end cover and the second end cover.

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