CN220660146U - Main shaft cooling structure - Google Patents
Main shaft cooling structure Download PDFInfo
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- CN220660146U CN220660146U CN202322360455.1U CN202322360455U CN220660146U CN 220660146 U CN220660146 U CN 220660146U CN 202322360455 U CN202322360455 U CN 202322360455U CN 220660146 U CN220660146 U CN 220660146U
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- cooling
- casting
- spindle
- main shaft
- water channel
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- 238000001816 cooling Methods 0.000 title claims abstract description 77
- 238000005266 casting Methods 0.000 claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000498 cooling water Substances 0.000 claims abstract description 27
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000000110 cooling liquid Substances 0.000 abstract description 20
- 238000000034 method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Auxiliary Devices For Machine Tools (AREA)
Abstract
The utility model discloses a main shaft cooling structure, which belongs to the technical field of numerical control machine tool accessories, and comprises a main shaft, wherein the main shaft is provided with a shell; the cooling sleeve is sleeved on the shell; the peripheral surface of the cooling sleeve is provided with a groove which is spirally arranged; the casting is sleeved on the cooling sleeve; the casting is in clearance fit with the cooling sleeve; the inner wall of the casting and the groove form a cooling water channel; the casting is provided with a water inlet and a water outlet, the water inlet is communicated with one end of the cooling water channel, and the water outlet is communicated with the other end of the cooling water channel; the two first sealing rings are embedded between the inner wall of the casting and the outer peripheral surface of the cooling sleeve, and the cooling water channel is positioned between the two first sealing rings; according to the utility model, the cooling water channel formed by the groove on the cooling sleeve and the inner wall of the casting is utilized, and the cooling liquid flows in the cooling water channel to exchange heat with the shell of the main shaft, so that heat conduction between the main shaft and the casting is blocked, the influence of the temperature rise of the main shaft on the casting is avoided, and the precision stability of the numerical control machine tool is improved.
Description
Technical Field
The utility model relates to the technical field of numerical control machine tool accessories, in particular to a main shaft cooling structure.
Background
The electric spindle integrates the machine tool spindle and the spindle motor, so that the spindle component can be relatively independent from a transmission system and an integral structure of the machine tool, and the structure with high rotating speed, high precision, low noise and locking opening of the inner ring is more suitable for spray lubrication.
At present, most numerical control machine tools use an electric spindle, and a built-in spindle motor continuously runs to generate a large amount of heat, so that the temperature of the electric spindle can be increased by a few degrees celsius or even tens of degrees celsius; in order to ensure that the electric spindle continuously and normally runs, cooling liquid is usually introduced into the electric spindle to realize cooling; the cooling mode can take away most of heat when the electric spindle runs, but still has part of heat to be transferred to the casting arranged on the electric spindle, so that the temperature of the casting rises, the straightness and the perpendicularity of the linear shaft of the numerical control machine tool can be possibly changed, the precision of the numerical control machine tool is unstable, and the phenomenon is particularly serious in the field of precision machining.
Therefore, the development and design of the main shaft cooling structure capable of effectively blocking heat conduction between the electric main shaft and the casting, reducing or avoiding the influence of temperature rise of the electric main shaft on the casting and improving the precision stability of the numerical control machine tool is a problem to be solved in the prior art.
Disclosure of Invention
For the problems in the prior art, the cooling structure of the main shaft provided by the utility model utilizes the cooling water channel formed by the groove on the cooling sleeve and the inner wall of the casting, and the cooling liquid fully exchanges heat with the shell of the main shaft when flowing in the cooling water channel, so that the heat conduction between the main shaft and the casting is effectively blocked, the influence of the temperature rise of the main shaft on the casting is avoided, and the precision stability of a numerical control machine tool is improved.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a main shaft cooling structure, which comprises:
a spindle having a housing;
the cooling sleeve is sleeved on the shell; the outer peripheral surface of the cooling sleeve is provided with a groove which is spirally arranged;
the casting is sleeved on the cooling sleeve; the casting is in clearance fit with the cooling sleeve; the inner wall of the casting and the groove form a cooling water channel; the casting is provided with a water inlet and a water outlet, the water inlet is communicated with one end of the cooling water channel, and the water outlet is communicated with the other end of the cooling water channel;
the two first sealing rings are embedded between the inner wall of the casting and the outer peripheral surface of the cooling sleeve, and the cooling water channel is positioned between the two first sealing rings.
As a preferable technical scheme, the shell is provided with a mounting flange, and one end of the cooling sleeve is abutted with the mounting flange.
As a preferred embodiment, the end face of the casting has mounting holes that match the mounting flange.
As a preferable technical scheme, one end of the cooling sleeve, which is close to the mounting flange, is provided with a positioning shaft shoulder, and a positioning surface is arranged on the inner wall of the casting at the position corresponding to the positioning shaft shoulder.
As a preferable technical scheme, the positioning shaft shoulder and the positioning surface are both rounded.
As a preferable technical scheme, a second sealing ring is arranged between the shell and the inner wall of the cooling sleeve;
and/or the shell is cylindrical.
As a preferable technical scheme, the positions of the cooling sleeve corresponding to the first sealing ring and the second sealing ring are provided with sealing ring grooves;
and/or two second sealing rings are arranged, and the two second sealing rings are respectively close to two ends of the cooling sleeve.
As a preferable technical scheme, the water inlet and the water outlet are respectively provided with a joint in threaded connection with the water inlet and the water outlet.
As a preferable technical scheme, a leakage port is arranged on the end face of the casting corresponding to one end of the cooling sleeve, which is far away from the mounting flange.
As a preferred technical scheme, the end face of the cooling sleeve, which is far away from the mounting flange, is subjected to chamfering.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the cooling water channel formed by the groove on the cooling sleeve and the inner wall of the casting is utilized, the casting and the cooling sleeve are sealed by the two first sealing rings, so that the cooling liquid can only flow in the cooling water channel; the cooling liquid can exchange heat with the shell of the main shaft fully when flowing in the cooling water channel, so that heat conduction between the main shaft and the casting is effectively blocked, the influence of main shaft temperature rise on the casting is avoided, and the precision stability of the numerical control machine tool is improved.
2. The positioning shaft shoulder on the cooling sleeve is matched with the positioning surface on the inner wall of the casting, so that the relative position between the cooling sleeve and the casting can be rapidly positioned in the installation process, and the installation efficiency and the installation accuracy are improved.
3. According to the utility model, the leakage port on the casting is utilized, so that leaked cooling liquid can be timely discharged, the damage to the main shaft caused by accumulation of the cooling liquid in a gap between the casting and the main shaft is avoided, and meanwhile, the leakage condition of the cooling liquid is easier to find, so that the cooling liquid is convenient to disassemble, replace and maintain in time.
Drawings
FIG. 1 is a schematic overall structure of a first embodiment of a spindle cooling structure according to the present utility model;
FIG. 2 is an enlarged view of area A of FIG. 1;
FIG. 3 is an enlarged view of region B of FIG. 1;
fig. 4 is a schematic view of the overall structure of the casting of fig. 1.
In the figure: 1-main shaft, 11-shell, 12-mounting flange, 2-cooling jacket, 21-groove, 22-positioning shaft shoulder, 23-sealing ring groove, 24-chamfer, 3-casting, 31-cooling water channel, 32-water inlet, 33-water outlet, 34-mounting hole, 35-positioning surface, 36-leakage port, 37-mounting cavity, 4-first sealing ring, 5-second sealing ring and 6-joint.
Detailed Description
The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
Referring to fig. 1-4, an embodiment of a spindle cooling structure provided by the present utility model includes a spindle 1, and a cylindrical housing 11 on an outer surface of the spindle 1; the cooling sleeve 2 is cylindrical and sleeved on the shell 11, the casting 3 is provided with a mounting cavity 37 matched with the shapes of the main shaft 1 and the cooling sleeve 2, and the casting 3 is sleeved on the cooling sleeve 2 through the mounting cavity 37; the casting 3 is in clearance fit with the cooling sleeve 2, the grooves 21 spirally arranged on the outer peripheral surface of the cooling sleeve 2 and the inner wall surface of the casting 3 form a cooling water channel 31 for cooling liquid to flow, and the cooling liquid can fully exchange heat with the shell 11 of the main shaft 1 when flowing in the cooling water channel 31, so that heat conduction between the main shaft 1 and the casting 3 can be effectively blocked, the influence of the temperature rise of the main shaft 1 on the casting 3 is avoided, and the precision stability of the numerical control machine tool is improved; the water inlet 32 and the water outlet 33 on the casting 3 are respectively communicated with two ends of the cooling water channel 31 and are respectively used for allowing cooling liquid to enter and flow out of the cooling water channel 31; the outer sides between the inner wall of the casting 3 and the outer peripheral surface of the cooling sleeve 2 at two ends of the cooling water channel 31 are respectively provided with a first sealing ring 4, and the first sealing rings 4 seal the casting 3 and the cooling sleeve 2, so that the cooling liquid can only flow in the cooling water channel 31.
In the use process of the utility model, the cooling water channel 31 is filled with the continuously flowing cooling liquid; the cooling liquid is preferably water or cooling oil.
In this embodiment, referring to fig. 1, 2 and 4, a mounting flange 12 is disposed at one end of the housing 11, and one end of the cooling jacket 2 abuts against the mounting flange 12, so that the relative position between the housing 11 and the cooling jacket 2 can be located; furthermore, the end face of one end of the casting 3 is set as a mounting surface matched with the mounting flange 12, a mounting hole 34 matched with the mounting flange 12 is formed in the mounting surface, the mounting flange 12 and the mounting hole 34 can be fixedly connected through bolts, and the main shaft 1 and the casting 3 are fixedly connected.
In this embodiment, referring to fig. 2, a positioning shaft shoulder 22 is provided at one end of the cooling jacket 2 near the mounting flange 12, and a positioning surface 35 is provided on the inner wall of the casting 3 at a position corresponding to the positioning shaft shoulder 22, so that the relative position between the cooling jacket 2 and the casting 3 can be rapidly positioned during the mounting process, and the mounting efficiency and the mounting precision are improved; furthermore, the positioning shaft shoulder 22 and the positioning surface 35 should be rounded, so that leakage of cooling liquid caused by the fact that the positioning shaft shoulder 22 or the positioning surface 35 scratches the first sealing ring 4 in the installation process can be effectively prevented.
In this embodiment, referring to fig. 1, 2 and 3, a second sealing ring 5 is disposed between the housing 11 and the inner wall of the cooling jacket 2, and the second sealing ring 5 can seal the housing 11 and the cooling jacket 2; specifically, two second sealing rings 5 are required, and the two second sealing rings 5 are respectively close to two ends of the cooling jacket 2, so that the sealing effect between the shell 11 and the cooling jacket 2 can be improved to the greatest extent; further, the positions of the cooling jacket 2 corresponding to the first sealing ring 4 and the second sealing ring 5 should be provided with sealing ring grooves 23, and the first sealing ring 4 and the second sealing ring 5 can be embedded into the corresponding sealing ring grooves 23, so that the positions of the first sealing ring 4 and the second sealing ring 5 can be conveniently positioned.
In this embodiment, referring to fig. 4, both the water inlet 32 and the water outlet 33 should be connected with a connector 6; specifically, the water inlet 32 and the water outlet 33 are both provided with internal threads, the joint 6 is provided with external threads, and the joint 6 is respectively in threaded connection with the water inlet 32 and the water outlet 33, so that the joint 6 can be conveniently and fixedly installed.
In this embodiment, referring to fig. 1, a leakage port 36 is provided on the end surface of the casting 3 corresponding to one end of the cooling jacket 2 away from the mounting flange 12, when the first sealing ring 4 is damaged by extrusion, the cooling liquid can be timely discharged from the leakage port 36, so as to avoid damage to the main shaft 1 caused by accumulation of the cooling liquid in a gap between the casting 3 and the main shaft 1, and meanwhile, the condition of leakage of the cooling liquid is easier to be found, so that the disassembly, the replacement and the maintenance are convenient in time; further, the end face, far away from the mounting flange 12, of the cooling sleeve 2 is subjected to chamfering 24 treatment, so that the first sealing ring 4 is prevented from being cut through in the mounting and using processes of the cooling sleeve 2, and the condition of leakage of cooling liquid is avoided.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A spindle cooling structure, comprising:
a spindle (1), the spindle (1) having a housing (11);
the cooling sleeve (2) is sleeved on the shell (11); the outer peripheral surface of the cooling sleeve (2) is provided with a groove (21) which is spirally arranged;
the casting (3) is sleeved on the cooling sleeve (2); the casting (3) is in clearance fit with the cooling sleeve (2); the inner wall of the casting (3) and the groove (21) form a cooling water channel (31); a water inlet (32) and a water outlet (33) are formed in the casting (3), the water inlet (32) is communicated with one end of the cooling water channel (31), and the water outlet (33) is communicated with the other end of the cooling water channel (31);
the two first sealing rings (4) are embedded between the inner wall of the casting (3) and the outer peripheral surface of the cooling sleeve (2), and the cooling water channel (31) is positioned between the two first sealing rings (4).
2. A spindle cooling arrangement according to claim 1, characterized in that the housing (11) is provided with a mounting flange (12), one end of the cooling jacket (2) being in abutment with the mounting flange (12).
3. A spindle cooling arrangement according to claim 2, characterized in that the end face of the casting (3) has mounting holes (34) matching the mounting flange (12).
4. A spindle cooling structure according to claim 2, characterized in that one end of the cooling jacket (2) close to the mounting flange (12) is provided with a positioning shoulder (22), and a positioning surface (35) is arranged on the inner wall of the casting (3) at a position corresponding to the positioning shoulder (22).
5. A spindle cooling arrangement according to claim 4, characterized in that the positioning shoulder (22) and the positioning surface (35) are rounded.
6. A spindle cooling arrangement according to claim 1, characterized in that a second sealing ring (5) is arranged between the housing (11) and the inner wall of the cooling jacket (2);
and/or the shell (11) is cylindrical.
7. A spindle cooling arrangement according to claim 6, characterized in that the cooling jacket (2) is provided with sealing ring grooves (23) at positions corresponding to the first sealing ring (4) and the second sealing ring (5);
and/or two second sealing rings (5) are arranged, and the two second sealing rings (5) are respectively close to two ends of the cooling sleeve (2).
8. A spindle cooling structure according to claim 1, characterized in that the water inlet (32) and the water outlet (33) are provided with a joint (6) in threaded connection therewith.
9. A spindle cooling arrangement according to claim 2, characterized in that the casting (3) is provided with a leakage opening (36) at the end face of the casting corresponding to the end of the cooling jacket (2) remote from the mounting flange (12).
10. A spindle cooling arrangement according to claim 2 or 9, characterized in that the end face of the cooling jacket (2) remote from the mounting flange (12) is chamfered (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322360455.1U CN220660146U (en) | 2023-08-31 | 2023-08-31 | Main shaft cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322360455.1U CN220660146U (en) | 2023-08-31 | 2023-08-31 | Main shaft cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220660146U true CN220660146U (en) | 2024-03-26 |
Family
ID=90330339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322360455.1U Active CN220660146U (en) | 2023-08-31 | 2023-08-31 | Main shaft cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220660146U (en) |
-
2023
- 2023-08-31 CN CN202322360455.1U patent/CN220660146U/en active Active
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