CN112893888A - Cooling structure, electric spindle and machine tool - Google Patents
Cooling structure, electric spindle and machine tool Download PDFInfo
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- CN112893888A CN112893888A CN202110091208.9A CN202110091208A CN112893888A CN 112893888 A CN112893888 A CN 112893888A CN 202110091208 A CN202110091208 A CN 202110091208A CN 112893888 A CN112893888 A CN 112893888A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
- B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles
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- Auxiliary Devices For Machine Tools (AREA)
Abstract
The invention provides a cooling structure, an electric spindle and a machine tool, wherein the cooling structure comprises: the sealing part is used for being connected with one end of a pull rod of the electric spindle, and a sealing cavity is formed in the sealing part; the first channel is arranged on the pull rod and arranged along the extending direction of the pull rod; the first channel is communicated with the sealing cavity, so that cooling liquid in the sealing cavity enters the first channel; the second channel is arranged on the shaft body of the electric spindle and is arranged along the extending direction of the shaft body; the second channel is communicated with the first channel, so that the cooling liquid in the first channel enters the second channel, and when the cooling liquid flows in the second channel, the rotor sleeved on the shaft body is cooled, and the problem that the rotor of the electric spindle cannot be cooled by a cooling structure in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of electric spindles, in particular to a cooling structure, an electric spindle and a machine tool.
Background
The high-speed electric spindle is a core component of a high-speed processing machine tool, the spindle motor is arranged in the spindle of the machine tool, and the spindle motor has the outstanding advantages of compact structure, small vibration, low noise, quick response, easiness in spindle positioning and accurate stopping and the like.
However, heat generated by the high-speed rotation of the motor in the electric spindle and frictional heat generation of the bearing are also inevitable. When the machine tool works, under the action of an internal heat source and an external heat source, each part of a main shaft system can generate temperature rise of different degrees; after the temperature is increased, the relative spatial positions and the sizes of the main shaft and other parts of the machine tool are different from those before the temperature is increased, so that different temperature fields are formed, and further, thermal expansion of different degrees is generated, and machining errors are caused. In the ultra-high speed machine tool, errors caused by thermal expansion are particularly prominent, because the rigidity and precision of each part of the main shaft system are high, the load is not very large, the machining errors caused by elastic deformation of the main shaft due to stress are very small, and the thermal expansion of the main shaft unit becomes a main factor influencing the machining precision.
Therefore, the design improvement of the cooling system of the high-speed electric spindle is used for controlling the temperature rise of the electric spindle and reducing the thermal expansion of the electric spindle, and the design improvement is very important for ensuring the performance of the electric spindle and prolonging the service life of the electric spindle.
Disclosure of Invention
The invention mainly aims to provide a cooling structure, an electric spindle and a machine tool, and aims to solve the problem that the cooling structure of the electric spindle in the prior art cannot cool a rotor of the electric spindle.
In order to achieve the above object, according to one aspect of the present invention, there is provided a cooling structure including: the sealing part is used for being connected with one end of a pull rod of the electric spindle, and a sealing cavity is formed in the sealing part; the first channel is arranged on the pull rod and arranged along the extending direction of the pull rod; the first channel is communicated with the sealing cavity, so that cooling liquid in the sealing cavity enters the first channel; the second channel is arranged on the shaft body of the electric spindle and is arranged along the extending direction of the shaft body; the second channel is communicated with the first channel, so that the cooling liquid in the first channel enters the second channel, and when the cooling liquid flows in the second channel, the rotor sleeved on the shaft body is cooled.
Furthermore, the pull rod is arranged on the shaft body in a penetrating mode, the second channel is an annular channel, and the second channel is arranged around the pull rod.
Further, the pull rod is worn to establish on the axis body, and the second passageway is the bar passageway, and the second passageway is a plurality of, and a plurality of second passageways set up around the circumference interval of pull rod.
Further, the cooling structure further includes: the third channel is arranged on the pull rod and is communicated with the first channel; and the fourth channel is arranged on the shaft body and is communicated with the second channel, and an outlet of the third channel is in butt joint with an inlet of the fourth channel.
Further, a third channel is located at the second end of the tie rod; and/or, the fourth channel is located at the second end of the shaft.
Further, a third channel extends to the outer wall of the pull rod to form an outlet of the third channel on the outer wall of the pull rod; the fourth channel extends to the inner wall of the shaft body to form an inlet of the fourth channel on the inner wall of the shaft body, and then an outlet of the third channel is in butt joint with the inlet of the fourth channel.
Further, the first passage extends to the first end of the drawbar to form an inlet of the first passage on the first end of the drawbar; the first end of the pull rod can be rotatably extended into the sealing cavity so as to be communicated with the sealing cavity.
Furthermore, the cooling structure also comprises a liquid inlet channel which is communicated with the sealing cavity so as to introduce cooling liquid into the sealing cavity; the cooling structure also comprises a liquid inlet pipe, a liquid inlet channel is formed in a pipe cavity of the liquid inlet pipe, and the liquid inlet pipe is connected with the sealing part; or the liquid inlet channel is arranged on the first end cover of the electric spindle, and the sealing part is fixedly connected with the first end cover.
Furthermore, the cooling structure also comprises a liquid drainage channel, and an outlet of the second channel is communicated with the liquid drainage channel; the cooling structure further comprises a liquid discharge pipe, a liquid discharge channel is formed in a pipe cavity of the liquid discharge pipe, and the liquid discharge pipe is connected with the shaft body; or the liquid drainage channel is arranged on the first end cover of the electric spindle, and the shaft body is rotatably arranged relative to the first end cover.
According to another aspect of the present invention, there is provided an electric spindle including a shaft body, a drawbar, a rotor, and the cooling structure described above.
According to a further aspect of the invention, there is provided a machine tool comprising an electric spindle as described above.
By applying the technical scheme of the invention, the cooling structure comprises a sealing part connected with one end of a pull rod of the electric spindle, a sealing cavity is arranged on the sealing part, a first channel is arranged on the pull rod, a second channel is arranged on a shaft body of the electric spindle, and the first channel is arranged along the extension direction of the pull rod and is communicated with the sealing cavity, so that cooling liquid in the sealing cavity can enter the first channel; the second passageway sets up and communicates with first passageway along the extending direction of axis body to make in the coolant liquid in the first passageway gets into the second passageway, when the coolant liquid in the second passageway flows through the second passageway, can cool off the rotor of cover on the axis body, can not carry out cooling treatment's problem to its rotor with the cooling structure of solving the electricity main shaft among the prior art.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic layout of a cooling structure of an electric spindle according to the present invention;
fig. 2 shows a longitudinal section through the electric spindle in fig. 1.
Wherein the figures include the following reference numerals:
10. a sealing part; 11. sealing the cavity;
20. a pull rod; 21. a first channel; 22. a third channel;
30. a shaft body; 31. a second channel; 32. a fourth channel;
41. a rotor; 42. a stator; 51. a liquid inlet channel; 52. a liquid discharge channel; 53. a liquid inlet pipe; 54. a liquid discharge pipe;
61. a first end cap; 62. a second end cap; 63. a first bearing; 64. a second bearing;
70. a housing frame; 81. a first loop; 811. a fifth channel; 812. a liquid outlet channel; 82. a second loop; 821. a sixth channel; 822. a liquid inlet channel; 90. a tool holder.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention provides a cooling structure, please refer to fig. 1 and fig. 2, the cooling structure comprises a sealing part 10, a first channel 21 and a second channel 31, the sealing part 10 is used for connecting with one end of a pull rod 20 of an electric spindle, and a sealing cavity 11 is arranged on the sealing part 10; the first channel 21 is arranged on the pull rod 20 and arranged along the extending direction of the pull rod 20; the first channel 21 is communicated with the sealed cavity 11, so that the cooling liquid in the sealed cavity 11 enters the first channel 21; the second channel 31 is arranged on the shaft body 30 of the electric spindle and arranged along the extending direction of the shaft body 30; the second passage 31 communicates with the first passage 21 so that the coolant in the first passage 21 enters the second passage 31 to cool the rotor 41 fitted around the shaft body 30 when the coolant flows in the second passage 31.
In the specific implementation process, the heating of the electric spindle mainly comprises copper loss heating of a stator winding and iron loss heating of a rotor, wherein the heating of the stator winding accounts for about 2/3 of the total heating value of the motor; the traditional cooling mode only carries out cooling treatment on a stator part, but does not carry out cooling treatment on an iron loss heating part of a rotor accounting for nearly 1/3 of the total heating amount of the motor, thereby forming the phenomenon of external cooling and internal heating.
In the cooling structure of the present invention, the cooling structure includes a sealing portion 10 for connecting with one end of a pull rod 20 of an electric spindle, and a sealing cavity 11 is provided on the sealing portion 10, a first channel 21 is provided on the pull rod 20, a second channel 31 is provided on a shaft body 30 of the electric spindle, the first channel 21 is provided along an extending direction of the pull rod 20 and is communicated with the sealing cavity 11, so that a cooling liquid in the sealing cavity 11 can enter the first channel 21; the second channel 31 is arranged along the extending direction of the shaft body 30 and is communicated with the first channel 21, so that the cooling liquid in the first channel 21 enters the second channel 31, and when the cooling liquid in the second channel 31 flows through the second channel 31, the rotor 41 sleeved on the shaft body 30 can be cooled, and the problem that the rotor of the electric spindle cannot be cooled by a cooling structure in the prior art is solved.
Specifically, the pull rod 20 is arranged on the shaft body 30 in a penetrating manner, and the extending direction of the pull rod 20 is parallel to the extending direction of the shaft body 30; preferably, the central axis of the tie rod 20 coincides with the central axis of the shaft body 30.
One end of the pull rod 20 extends out of the shaft body 30 and is connected with the sealing part 10; wherein, the pull rod 20 and the shaft body 30 are relatively fixed, so that the pull rod 20 rotates synchronously with the shaft body 30; the sealing part 10 is fixedly arranged, and the pull rod 20 is rotatably arranged relative to the sealing part 10.
In the present embodiment, the tie rod 20 has a central passage forming a first passage 21, i.e. the central axis of the first passage 21 coincides with the central axis of the tie rod 20.
In the present embodiment, the first structural arrangement of the second channel 31 is as follows: the second passage 31 is an annular passage, and the second passage 31 is provided around the tie rod 20 to secure a cooling effect to the rotor 41.
In the present embodiment, the second structural arrangement of the second channel 31 is as follows: the second channels 31 are strip-shaped channels, the second channels 31 are multiple, and the second channels 31 are arranged around the pull rod 20 at intervals in the circumferential direction, so that the cooling effect on the rotor 41 can be ensured.
In the present embodiment, the cooling structure further includes a third channel 22 and a fourth channel 32, the third channel 22 is disposed on the tie rod 20 and is communicated with the first channel 21; the fourth channel 32 is disposed on the shaft 30 and is communicated with the second channel 31, and an outlet of the third channel 22 is in butt joint with an inlet of the fourth channel 32, so that the first channel 21 is communicated with the second channel 31 through the third channel 22 and the fourth channel 32, that is, the cooling liquid in the first channel 21 enters the third channel 22, flows out from the outlet of the third channel 22, flows into the fourth channel 32 from the inlet of the fourth channel 32, and then enters the second channel 31.
Specifically, a first end of the tie rod 20 is used to connect with the seal 10, and a third channel 22 is located at a second end of the tie rod 20.
Specifically, the fourth channel 32 is located at the second end of the shaft 30; the direction from the first end of the pull rod 20 to the second end thereof is the same as the direction from the first end of the shaft 30 to the second end thereof.
Specifically, the third passage 22 extends to the outer wall of the tie rod 20 to form an outlet of the third passage 22 on the outer wall of the tie rod 20; the fourth channel 32 extends to the inner wall of the shaft body 30 to form an inlet of the fourth channel 32 on the inner wall of the shaft body 30, such that the outlet of the third channel 22 is interfaced with the inlet of the fourth channel 32.
Wherein, the outer wall of the pull rod 20 is attached to the inner wall of the shaft body 30, so that the outlet of the third channel 22 is butted with the inlet of the fourth channel 32.
Specifically, the first structural arrangement of the fourth channel 32 and the third channel 22 is as follows: the fourth channel 32 is disposed around the third channel 22.
Specifically, the second structural arrangement of the fourth channel 32 and the third channel 22 is as follows: the third channel 22 is a strip-shaped channel, and the extending direction of the third channel 22 is perpendicular to the extending direction of the first channel 21. Optionally, the third channel 22 is plural, and the plural third channels 22 are arranged at intervals along the circumference of the pull rod 20. The fourth channel 32 is a strip-shaped channel, and the extending direction of the fourth channel 32 is perpendicular to the extending direction of the second channel 31. Optionally, the number of the fourth channels 32 is multiple, and the multiple fourth channels 32 are disposed in one-to-one correspondence with the multiple third channels 22.
Alternatively, when the second channel 31 is a strip-shaped channel and the second channel 31 is a plurality of channels, the plurality of fourth channels 32 are disposed in one-to-one correspondence with the plurality of second channels 31.
In the present embodiment, the first passage 21 extends to the first end of the draw bar 20 to form an inlet of the first passage 21 on the first end of the draw bar 20; the first end of the pull rod 20 is rotatably extended into the seal chamber 11 to communicate with the seal chamber 11, and the pull rod 20 is allowed to rotate with respect to the seal portion 10.
In this embodiment, the cooling structure further includes a liquid inlet channel 51, and the liquid inlet channel 51 is communicated with the sealed cavity 11 to introduce the cooling liquid into the sealed cavity 11.
Specifically, the electric spindle includes a first end cover 61 fixedly disposed, and the shaft body 30 is rotatably disposed relative to the first end cover 61.
Specifically, the cooling structure further comprises a liquid inlet pipe 53, and a cavity of the liquid inlet pipe 53 forms a liquid inlet channel 51 so as to communicate the cavity of the liquid inlet pipe 53 with the sealed cavity 11; the liquid inlet pipe 53 is connected with the sealing part 10; the liquid inlet pipe 53 is fixedly arranged on the first end cover 61 of the electric spindle in a penetrating way, and the sealing part 10 is fixedly connected with the first end cover 61.
Alternatively, the liquid inlet channel 51 is arranged on the first end cover 61 of the electric spindle, and the sealing part 10 is fixedly connected with the first end cover 61.
In the present embodiment, the cooling structure further includes a liquid discharge passage 52, and the outlet of the second passage 31 communicates with the liquid discharge passage 52.
Specifically, the cooling structure further includes a drain pipe 54, a lumen of the drain pipe 54 forming the drain passage 52 so that the lumen of the drain pipe 54 communicates with the second passage 31; the drain pipe 54 is connected with the shaft body 30; the drain pipe 54 is fixedly inserted into the first end cap 61, so that the shaft body 30 is rotatably disposed with respect to the drain pipe 54. Alternatively, the drain passage 52 is provided on the first end cap 61.
Specifically, when the second passage 31 is an annular passage, the second passage 31 extends to the first end of the shaft body 30 to form an annular outlet of the second passage 31 on the first end of the shaft body 30; the liquid drainage channel 52 is a strip-shaped channel, one port of the liquid drainage channel 52 is communicated with the annular outlet of the second channel 31, and the liquid drainage channel 52 is ensured to be communicated with the second channel 31 when the shaft body 30 rotates; the other port of the drain passage 52 is used for connection with the oil cooler so that the coolant in the drain passage 52 flows back into the oil cooler. Alternatively, the oil cooler may be replaced with an oil temperature controller.
Specifically, when the second channel 31 is a strip-shaped channel and there are a plurality of second channels 31, the shaft body 30 is further provided with a connecting channel, the connecting channel is an annular channel, and the connecting channel is arranged around the circumference of the pull rod 20; the end of each second passage 31 near the seal portion 10 communicates with the connecting passage; the connection channel extends to a first end of the shaft body 30 to form an annular outlet of the connection channel on the first end of the shaft body 30; the liquid drainage channel 52 is a strip-shaped channel, one port of the liquid drainage channel 52 is communicated with the annular outlet of the connecting channel, and the liquid drainage channel 52 is ensured to be communicated with the connecting channel when the shaft body 30 rotates; the other port of the drain passage 52 is for connection to an oil cooler.
In this embodiment, the cooling liquid selects the cooling oil with lower viscosity, and the cooling oil is prevented from being attached to the inner wall of each channel to influence the cooling effect.
The invention also provides an electric spindle which comprises a shaft body 30, a pull rod 20, a rotor 41 and the cooling structure.
Specifically, the rotor 41 is sleeved on the shaft 30, the stator 42 is sleeved on the outer side of the rotor 41, and the rotor 41 is rotatably disposed relative to the stator 42.
Specifically, the electric spindle further comprises a housing frame 70, a first end cover 61 and a second end cover 62, the housing frame 70 is cylindrical, and the first end cover 61 and the second end cover 62 are respectively arranged at two ends of the housing frame 70, so that the housing frame 70, the first end cover 61 and the second end cover 62 jointly enclose an installation cavity; the shaft body 30, the pull rod 20, the rotor 41, the stator 42 and the sealing part 10 are all positioned in the mounting cavity.
Specifically, the electric spindle further comprises a first bearing 63 and a second bearing 64, wherein the first bearing 63 and the second bearing 64 are respectively sleeved on the shaft body 30, so that the first bearing 63 and the second bearing 64 are respectively arranged between the shaft body 30 and the housing frame 70, and further the shaft body 30 can rotate relative to the housing frame 70; the first bearing 63 and the second bearing 64 are respectively positioned on both sides of the rotor 41, and when the coolant flows in the second passage 31, the inside of the first bearing 63 and the inside of the second bearing 64 can be cooled.
Wherein, the rotor 41 rotates with the shaft body 30, and part of the heat generated by the rotor is transferred to the first bearing 63 and the second bearing 64, which affects the service life of the first bearing 63 and the second bearing 64; as the rotation speed of the shaft body 30 increases, the amount of friction heat generated by the first bearing 63 and the second bearing 64 increases, and the cooling structure of the present invention can enhance the cooling effect on the first bearing 63 and the second bearing 64.
Specifically, the electric spindle further includes a first ring sleeve 81, the first ring sleeve 81 is sleeved on the outer sides of the stator 42 and the first bearing 63, so that the first ring sleeve 81 is fixedly disposed between the housing frame 70 and the stator 42 and the first bearing 63; the first collar 81 is provided with a fifth passage 811, and the fifth passage 811 is used for flowing cooling fluid, so that the cooling fluid cools the stator 42 and the outer side of the first bearing 63 when flowing through the fifth passage 811.
Specifically, the electric spindle further includes a second ring sleeve 82, the second ring sleeve 82 is sleeved on the outer side of the second bearing 64, so that the second ring sleeve 82 is fixedly arranged between the second bearing 64 and the housing frame 70; the second collar 82 is provided with a sixth passage 821, and the sixth passage 821 is used for cooling fluid to flow through so as to cool the outer side of the second bearing 64 when the cooling fluid flows through the sixth passage 821.
Specifically, the second ring 82 is further provided with a liquid inlet channel 822 communicated with the sixth channel 821, so as to introduce the cooling liquid into the sixth channel 821 through the liquid inlet channel 822; the sixth passage 821 communicates with the fifth passage 811 so that the coolant in the sixth passage 821 enters the fifth passage 811; the first ring sleeve 81 is further provided with a liquid outlet channel 812 communicated with the fifth channel 811, so that the cooling liquid in the fifth channel 811 is discharged through the liquid outlet channel 812.
Specifically, the first collar 81 is connected to the second collar 82 such that the outlet of the sixth passage 821 is in abutment with and communicates with the inlet of the fifth passage 811.
Optionally, the fifth channel 811 is a ring channel; the sixth passage 821 is an annular passage.
Optionally, the extending direction of the fifth channel 811 is parallel to the extending direction of the shaft 30, and the extending direction of the liquid outlet channel 812 is perpendicular to the extending direction of the fifth channel 811; the sixth passage 821 extends in a direction parallel to the direction in which the shaft body 30 extends, and the liquid inlet passage 822 extends in a direction perpendicular to the direction in which the sixth passage 821 extends.
Specifically, the shaft 30 is used to connect with the tool holder 90, and the tool holder 90 is used to hold a tool, so that the shaft 30 drives the tool holder 90 and the tool held by the tool holder to rotate, thereby performing a machining operation.
Specifically, the electric spindle further comprises a motor, and the motor is connected with the shaft body 30 to drive the shaft body 30 to rotate; the motor is disposed in the shaft body 30, and a large amount of heat is generated when the motor rotates at a high speed, which is a main heat generation source of the internal structure of the shaft body 30.
The invention also provides a machine tool which comprises the electric spindle.
According to the invention, by arranging the cooling structure on the electric spindle, when cooling liquid flows in the first channel 21 and the second channel 31, the pull rod 20 and the spindle body 30 can be cooled, so that the machining precision error caused by thermal expansion at the spindle core of the electric spindle is reduced fundamentally, and the machining precision of a machine tool is improved; on the premise of controlling the temperature rise, the rotating speed of the shaft body 30 can be further increased, so that the machining efficiency of the machine tool is higher, and meanwhile, the problem of service life reduction caused by thermal expansion of the first bearing 63 and the second bearing 64 is effectively solved.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
in the cooling structure of the present invention, the cooling structure includes a sealing portion 10 for connecting with one end of a pull rod 20 of an electric spindle, and a sealing cavity 11 is provided on the sealing portion 10, a first channel 21 is provided on the pull rod 20, a second channel 31 is provided on a shaft body 30 of the electric spindle, the first channel 21 is provided along an extending direction of the pull rod 20 and is communicated with the sealing cavity 11, so that a cooling liquid in the sealing cavity 11 can enter the first channel 21; the second channel 31 is arranged along the extending direction of the shaft body 30 and is communicated with the first channel 21, so that the cooling liquid in the first channel 21 enters the second channel 31, and when the cooling liquid in the second channel 31 flows through the second channel 31, the rotor 41 sleeved on the shaft body 30 can be cooled, and the problem that the rotor of the electric spindle cannot be cooled by a cooling structure in the prior art is solved.
Since the electric spindle of the present invention includes the cooling structure described above, the electric spindle has at least the same technical effects as the cooling structure described above.
Since the machine tool of the present invention includes the electric spindle described above, the machine tool has at least the same technical effects as the electric spindle described above.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A cooling structure, comprising:
the sealing part (10) is used for being connected with one end of a pull rod (20) of the electric spindle, and a sealing cavity (11) is formed in the sealing part (10);
a first channel (21), the first channel (21) being provided on the tie rod (20) and being provided along the extension direction of the tie rod (20); the first channel (21) is communicated with the sealed cavity (11) so that the cooling liquid in the sealed cavity (11) enters the first channel (21);
a second channel (31), wherein the second channel (31) is arranged on a shaft body (30) of the electric spindle and is arranged along the extending direction of the shaft body (30); the second channel (31) is communicated with the first channel (21) so that the cooling liquid in the first channel (21) enters the second channel (31) to cool the rotor (41) sleeved on the shaft body (30) when the cooling liquid flows in the second channel (31).
2. The cooling structure according to claim 1, wherein the tie rod (20) is inserted into the shaft body (30), and the second passage (31) is an annular passage, and the second passage (31) is provided around the tie rod (20).
3. The cooling structure according to claim 1, wherein the tie rod (20) is provided through the shaft body (30), the second channel (31) is a strip-shaped channel, the second channel (31) is provided in plurality, and the plurality of second channels (31) are provided at intervals around the circumference of the tie rod (20).
4. The cooling structure according to claim 1, characterized in that the cooling structure further comprises:
a third channel (22), said third channel (22) being provided on said tie rod (20) and communicating with said first channel (21);
a fourth channel (32), wherein the fourth channel (32) is arranged on the shaft body (30) and communicated with the second channel (31), and an outlet of the third channel (22) is in butt joint with an inlet of the fourth channel (32).
5. A cooling structure according to claim 4, characterized in that the third channel (22) is located at the second end of the tie rod (20); and/or the fourth channel (32) is located at the second end of the shaft body (30).
6. The cooling structure according to claim 4, characterized in that the third channel (22) extends to the outer wall of the tie rod (20) to form an outlet of the third channel (22) on the outer wall of the tie rod (20); the fourth channel (32) extends to the inner wall of the shaft body (30) to form an inlet of the fourth channel (32) on the inner wall of the shaft body (30), so that an outlet of the third channel (22) is in butt joint with the inlet of the fourth channel (32).
7. The cooling structure according to claim 1, characterized in that the first channel (21) extends to a first end of the tie rod (20) to form an inlet of the first channel (21) on the first end of the tie rod (20); the first end of the pull rod (20) can rotatably extend into the sealed cavity (11) to be communicated with the sealed cavity (11).
8. The cooling structure according to claim 1, characterized in that the cooling structure further comprises a liquid inlet channel (51), wherein the liquid inlet channel (51) is communicated with the sealed cavity (11) to feed cooling liquid into the sealed cavity (11);
the cooling structure further comprises a liquid inlet pipe (53), a pipe cavity of the liquid inlet pipe (53) forms the liquid inlet channel (51), and the liquid inlet pipe (53) is connected with the sealing part (10); or
The liquid inlet channel (51) is arranged on a first end cover (61) of the electric spindle, and the sealing part (10) is fixedly connected with the first end cover (61).
9. The cooling structure according to claim 1, further comprising a liquid discharge channel (52), an outlet of the second channel (31) communicating with the liquid discharge channel (52);
the cooling structure further comprises a liquid discharge pipe (54), the lumen of the liquid discharge pipe (54) forms the liquid discharge channel (52), and the liquid discharge pipe (54) is connected with the shaft body (30); or
The liquid discharge channel (52) is arranged on a first end cover (61) of the electric spindle, and the shaft body (30) is rotatably arranged relative to the first end cover (61).
10. An electric spindle comprising a shaft body (30), a tie rod (20), a rotor (41) and a cooling structure, characterized in that the cooling structure is a cooling structure according to any one of claims 1 to 9.
11. A machine tool comprising an electric spindle, characterized in that it is an electric spindle according to claim 10.
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| CN202110091208.9A CN112893888A (en) | 2021-01-22 | 2021-01-22 | Cooling structure, electric spindle and machine tool |
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| CN203526563U (en) * | 2013-08-07 | 2014-04-09 | 安阳工学院 | Online temperature detection electric spindle with arched enveloped cooling water channels |
| CN205147334U (en) * | 2015-10-19 | 2016-04-13 | 上海福亚精密机械有限公司 | Two -pass cooling electricity main shaft structure |
| CN205566014U (en) * | 2016-04-07 | 2016-09-07 | 温岭市宇海机电有限公司 | Electric main shaft of two coolings |
| CN110842226A (en) * | 2019-11-30 | 2020-02-28 | 深圳市爱贝科精密机械有限公司 | Mechanical main shaft based on central water cooling and central air blowing |
| CN210451009U (en) * | 2019-08-13 | 2020-05-05 | 西安斯莱克智能系统有限公司 | Electric spindle capable of cooling rotor |
| CN111112652A (en) * | 2019-12-11 | 2020-05-08 | 珠海格力电器股份有限公司 | Internal and external cooling system, cooling method, electric spindle and machining center |
| CN111687681A (en) * | 2020-07-10 | 2020-09-22 | 深圳市爱贝科精密机械有限公司 | Cooling mechanism of electric spindle and electric spindle |
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2021
- 2021-01-22 CN CN202110091208.9A patent/CN112893888A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09150345A (en) * | 1995-11-29 | 1997-06-10 | Nippei Toyama Corp | Motor built-in spindle |
| CN103213029A (en) * | 2013-04-03 | 2013-07-24 | 宝鸡忠诚机床股份有限公司 | Cooling method of electric spindle for high-speed turning center, and internal and external cooled electric spindle |
| CN203526563U (en) * | 2013-08-07 | 2014-04-09 | 安阳工学院 | Online temperature detection electric spindle with arched enveloped cooling water channels |
| CN205147334U (en) * | 2015-10-19 | 2016-04-13 | 上海福亚精密机械有限公司 | Two -pass cooling electricity main shaft structure |
| CN205566014U (en) * | 2016-04-07 | 2016-09-07 | 温岭市宇海机电有限公司 | Electric main shaft of two coolings |
| CN210451009U (en) * | 2019-08-13 | 2020-05-05 | 西安斯莱克智能系统有限公司 | Electric spindle capable of cooling rotor |
| CN110842226A (en) * | 2019-11-30 | 2020-02-28 | 深圳市爱贝科精密机械有限公司 | Mechanical main shaft based on central water cooling and central air blowing |
| CN111112652A (en) * | 2019-12-11 | 2020-05-08 | 珠海格力电器股份有限公司 | Internal and external cooling system, cooling method, electric spindle and machining center |
| CN111687681A (en) * | 2020-07-10 | 2020-09-22 | 深圳市爱贝科精密机械有限公司 | Cooling mechanism of electric spindle and electric spindle |
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