CN214092762U - Spindle front end cover air-tight seal structure - Google Patents
Spindle front end cover air-tight seal structure Download PDFInfo
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- CN214092762U CN214092762U CN202022736558.XU CN202022736558U CN214092762U CN 214092762 U CN214092762 U CN 214092762U CN 202022736558 U CN202022736558 U CN 202022736558U CN 214092762 U CN214092762 U CN 214092762U
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Abstract
The utility model discloses a spindle front end cover air sealing structure, belonging to the technical field of grinding and sealing; the anti-backflow air conditioner comprises a flow guide cover, an air inlet end cover and an anti-backflow gland, wherein the flow guide cover, the air inlet end cover and the anti-backflow gland are sleeved at the front end of a spindle shaft core, the spindle shaft core is arranged in a shaft hole of a shell, and the spindle shaft core is rotatably connected with the shell through a bearing and a spacer bush; the spacer bush comprises an inner spacer bush, an outer spacer bush and a pressing spacer bush; the right end outer ring of the anti-backflow gland is tightly connected with the shell, the right end inner ring is connected with the compression spacer sleeve and the bearing in a matched mode, the left end outer ring of the anti-backflow gland is connected with the air inlet end cover, and the left end inner ring of the anti-backflow gland is connected with the flow guide cover in a matched mode; the air inlet end cover, the anti-backflow gland and the shell are all provided with air inlet holes and communicated with each other. The utility model discloses a set up the inlet port way inside the structure and form the gas field, can prevent effectively that external cutting fluid and debris from getting into inside the main shaft to the reliable operation of main shaft unit has been guaranteed.
Description
Technical Field
The utility model relates to a lathe main shaft front end seal structure, concretely relates to main shaft front end housing air seal structure belongs to the sealed technical field of abrasive machining.
Background
At present, with the continuous enhancement of the basic capability of the industry, the manufacturing level is obviously improved, more and more high-speed machine tools are applied to production, and particularly, the electric spindle unit plays a positive role in improving the production capability level of the machine tools.
The existing high-speed high-precision electric spindle for grinding can guarantee long-time effective operation in the grinding process, and guarantees that the inside of the spindle is not invaded by moisture of cutting fluid in the grinding process, so that the service life of a bearing in the spindle is shortened, the bearing is damaged, and a serious person causes short circuit of a spindle motor due to water leakage and burns the motor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the air sealing structure of the front end cover of the main shaft is provided, and through the labyrinth circulation structure of the internal cavity of the flow guide cover, the backflow prevention gland and the air inlet end cover, in the rotating process of the main shaft, positive and negative air fields formed by air pressure can effectively prevent external cutting fluid and sundries from entering the main shaft, so that the reliable operation of a main shaft unit is ensured.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a kind of main axis front end cover air-tight seal structure, including the flow guiding cover, air inlet end cover and backflow-proof gland that the cover is set up in the front end of the axle core of the main axis, the axle core of the said main axis is set up in the shaft hole of the body, connect with the said body through bearing and spacer rotation; the spacer bush comprises an inner spacer bush, an outer spacer bush and a compression spacer bush, the left end of the bearing is connected with the compression spacer bush in a positioning way, and the right end of the bearing is connected with the outer spacer bush in a positioning way through the inner spacer bush; the right end outer ring of the anti-backflow gland is tightly connected with the shell, the right end inner ring is connected with the compression spacer sleeve and the bearing in a matching mode, the left end outer ring of the anti-backflow gland is connected with the air inlet end cover, the left end inner ring is connected with the flow guide cover in a matching mode, and the left end of the air inlet end cover is connected to the outer ring of the flow guide cover; the air inlet end cover, the anti-backflow gland and the shell are all provided with air inlet holes and communicated with each other.
The anti-backflow pressure cover is characterized in that a flow guide cover counter bore is formed in the inner ring of the flow guide cover, an end cover counter bore and an end cover hole path are formed in the outer ring of the air inlet end cover, a pressure cover counter bore and a pressure cover hole path are formed in the outer ring of the anti-backflow pressure cover, a threaded through hole is further formed in the outer ring of the anti-backflow pressure cover, the threaded through hole is fastened and connected to the spindle shaft core through a tightening nut, and a shell screw hole and a shell hole path are formed in the.
The guide cover counter bore, the end cover counter bore, the gland cover counter bore and the shell screw hole are all arranged in parallel to the axis direction, and the thread through hole is arranged in a direction perpendicular to the axis direction; the guide cover is fixedly connected to the elastic nut through the guide cover counter bore by a screw, the air inlet end cover is fixedly connected to the anti-backflow gland through the end cover counter bore by a screw, and the anti-backflow gland is fixedly connected to the shell outer ring through the gland counter bore in the shell screw hole.
The end cover hole path is a right-angle through hole and is formed by connecting a vertical hole section with a horizontal hole section, the vertical hole section is arranged perpendicular to the axis direction, the lower end of the vertical hole section is an air outlet, the right end of the horizontal hole section is an air inlet and is connected with the gland hole path, and the horizontal hole section, the gland hole path and the shell hole path are all arranged in parallel to the axis direction, are positioned on the same axis and are communicated with each other.
The air inlet cover is characterized in that a conical convex ring and a groove are arranged on the outer ring of the right end of the flow guide cover, an inner chamfer ring and an outer chamfer ring are arranged on the inner ring of the air inlet end cover, and a conical ring table and a right-angle boss are arranged on the inner ring of the left end of the anti-backflow gland.
The right end of the flow guide cover is connected to the inner ring at the left end of the anti-backflow gland in a matching mode, the conical convex ring is located on the conical ring table, and the conical ring table is connected to the inner portion of the groove in a matching mode; the right end of the air inlet end cover is tightly attached to the outer ring at the left end of the anti-backflow gland, and the outer chamfer ring is positioned on the right-angle boss; the left end inner ring of the air inlet end cover is connected to the outer ring of the flow guide cover, and the inner chamfer ring is connected to the outer ring of the conical convex ring.
A gas guide cavity is formed between the conical convex ring on the outer ring of the guide cover and the inner part of the inner chamfer ring on the inner ring of the air inlet end cover; and a taper reverse cavity is formed between the taper convex ring and the groove on the outer ring of the flow guide cover and the interior of the taper ring table on the inner ring of the anti-backflow gland.
The anti-backflow pressing device is characterized in that a convex ring pressing cover and a clamping ring are arranged on the inner ring of the right end of the anti-backflow pressing cover, the convex ring pressing cover is connected to the upper left end of the bearing, the pressing spacer bush is connected to the lower left end of the bearing, the outer spacer bush is connected to the upper right end of the bearing, and the inner spacer bush is connected to the lower right end of the bearing.
The inner ring of the compressing spacer bush is connected to the spindle core, a clamping groove matched with the clamping ring is formed in the outer ring of the compressing spacer bush, and the clamping ring is matched and connected with the clamping groove.
The utility model has the advantages that: 1) the utility model discloses a gaseous water conservancy diversion cavity and the reverse cavity of tapering that form between water conservancy diversion lid, anti-return gland and the inlet end cover structure form the pressure field including in the use, because the protective screen that the gas field formed makes moisture and foreign matter can't enter into inside the main shaft, can effectually prevent that the main shaft is inside to be invaded by cutting fluid and foreign matter to guaranteed the long-term steady operation of main shaft, reduced the damage of bearing, extension bearing life.
2) The utility model discloses well water conservancy diversion lid, anti-return gland and inlet end cover and all are provided with the counter bore, all adopt the screw to come fixed connection between the structure, and threaded connection relation makes to connect between the structure fastening, dismantlement convenient, and can make structural connection inseparable, and sealing performance is good.
3) The utility model discloses well water conservancy diversion lid, anti-return gland and inlet end cover all are provided with the inlet port way, and the inlet port way all is on a parallel with the setting of axis direction and is located same axis and communicates each other for the air inlet of inlet end cover is unblocked and can be continuous obtain the air current, guarantees to continuously form the air current pressure field.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the deflector cap of FIG. 1;
FIG. 3 is a schematic structural view of the intake end cover of FIG. 1;
FIG. 4 is a schematic structural view of the anti-backflow gland of FIG. 1;
fig. 5 is a partially enlarged schematic view of the connection of the deflector cap, the inlet end cap and the left end of the anti-backflow gland in fig. 1.
In the figure, 1-spindle shaft core, 2-guide cover, 201-guide cover counter bore, 202-conical convex ring, 203-groove, 3-air inlet end cover, 301-end cover counter bore, 302-end cover hole path, 303-inner chamfer ring, 304-outer chamfer ring, 4-backflow prevention gland, 401-gland counter bore, 402-gland hole path, 403-conical ring platform, 404-right angle boss, 405-convex ring gland, 406-snap ring, 5-shell, 501-shell screw hole, 502-shell hole path, 6-bearing, 7-spacer, 701-inner spacer, 702-outer spacer, 703-compression spacer, 8-loose nut, 9-air guide cavity and 10-taper reverse cavity.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
Example (b): as shown in fig. 1-5, the air sealing structure for the front end cover of the spindle of the present invention comprises a diversion cover 2, an air inlet cover 3 and a backflow prevention gland 4, which are sleeved on the front end of a spindle shaft core 1, wherein the spindle shaft core 1 is connected in the shaft hole of a housing 5, and the spindle shaft core 1 is rotatably connected with the housing 5 through a bearing 6 and a spacer 7; the spacer 7 comprises an inner spacer 701, an outer spacer 702 and a pressing spacer 703, the left end of the bearing 6 is positioned and connected through the pressing spacer 703, and the right end is positioned and connected through the inner spacer 701 and the outer spacer 702; the right end outer ring of the anti-backflow gland 4 is tightly connected with the shell 5, the right end inner ring is connected with the pressing spacer 703 and the bearing 6 in a matching way, the left end outer ring of the anti-backflow gland 4 is connected with the air inlet end cover 3, the left end inner ring is connected with the flow guide cover 2 in a matching way, and the left end of the air inlet end cover 3 is connected with the outer ring of the flow guide cover 2; and the air inlet end cover 3, the anti-backflow gland 4 and the shell 5 are all provided with air inlet holes and communicated with each other.
The inner ring of the diversion cover 2 is provided with a diversion cover counter bore 201, the outer ring of the air inlet end cover 3 is provided with an end cover counter bore 301 and an end cover hole path 302, the outer ring of the anti-return gland 4 is provided with a gland counter bore 401 and a gland hole path 402, the outer ring of the anti-return gland 4 is further provided with a threaded through hole and is tightly connected on the spindle shaft core 1 through an elastic nut 8, and the outer ring of the shell 5 is provided with a shell screw hole 501 and a shell hole path 502.
The guide cover counter bore 201, the end cover counter bore 301, the gland cover counter bore 401 and the shell screw hole 501 are all arranged in parallel to the axis direction, and the thread through hole is arranged in a direction perpendicular to the axis direction; the flow guide cover 2 is fixedly connected to the elastic nut 8 through a flow guide cover counter bore 201 by screws, the air inlet end cover 3 is fixedly connected to the anti-backflow gland 4 through an end cover counter bore 301 by screws, and the anti-backflow gland 4 is fixedly connected to the shell screw hole 501 on the outer ring of the shell 5 through a gland counter bore 401 by screws.
The end cover hole path 302 is a right-angle through hole and is formed by connecting a vertical hole section with a horizontal hole section, the vertical hole section is arranged perpendicular to the axis direction, the lower end of the vertical hole section is an air outlet, the right end of the horizontal hole section is an air inlet and is connected with the gland hole path 402, and the horizontal hole section, the gland hole path 402 and the shell hole path 502 are all arranged parallel to the axis direction, are positioned on the same axis and are communicated with each other.
The outer ring of the right end of the flow guide cover 2 is provided with a conical convex ring 202 and a groove 203, the inner ring of the air inlet end cover 3 is provided with an inner chamfer ring 303 and an outer chamfer ring 304, and the inner ring of the left end of the anti-backflow gland 4 is provided with a conical ring platform 403 and a right-angle boss 404.
The right end of the diversion cover 2 is connected to the inner ring at the left end of the anti-backflow gland 4 in a matching manner, the conical convex ring 202 is positioned on the conical ring platform 403, and the conical ring platform 403 is connected to the inner part of the groove 203 in a matching manner; the right end of the air inlet end cover 3 is tightly attached to the outer ring at the left end of the anti-backflow gland 4, and the outer chamfer ring 304 is positioned on the right-angle boss 404; the left end inner ring of the air inlet end cover 3 is connected to the outer ring of the flow guide cover 2, and the inner chamfer ring 303 is connected to the outer ring of the conical convex ring 202.
A gas guide cavity 9 is formed between the conical convex ring 202 on the outer ring of the guide cover 2 and the inner part of the inner chamfer ring 303 on the inner ring of the air inlet end cover 3; the tapered convex ring 202 and the groove 203 on the outer ring of the flow guiding cover 2 and the tapered annular platform 403 on the inner ring of the backflow preventing gland 4 form a tapered reverse cavity 10.
A convex ring gland 405 and a snap ring 406 are arranged on the inner ring at the right end of the anti-backflow gland 4, the convex ring gland 405 is connected to the left upper end of the bearing 6, a compression spacer 703 is connected to the left lower end of the bearing 6, an outer spacer 702 is connected to the right upper end of the bearing 6, and an inner spacer 701 is connected to the right lower end of the bearing 6.
The inner ring of the compressing spacer 703 is connected to the spindle core 1, the outer ring of the compressing spacer 703 is provided with a clamping groove matched with the clamping ring 406, and the clamping ring 406 is matched and connected with the clamping groove.
The working principle is as follows: 1) an air field is formed in the inner cavity of the air inlet end cover 3 through an air inlet of the air inlet end cover 3, a pressure field is formed in the inner cavity by continuous airflow, the airflow is discharged out of the inner cavity of the air inlet end cover 3 through a gap of 0.2-0.3 between the flow guide cover 2 and the backflow-preventing front pressing cover 4, and a circular airflow field of 0.1-0.3 Mpa is continuously formed due to continuous discharge of air pressure, so that cutting fluid cannot enter the inner part of a spindle shaft cavity, and normal operation and long service life of the bearing are realized.
2) Between end cover 3 and the water conservancy diversion lid 2 of admitting air, formed first way and had the gaseous water conservancy diversion cavity 9 of tapering, gaseous when this department of process, thereby can be because of the reduction of volume and accelerate the velocity of flow and make atmospheric pressure grow, speed grow, in the blowout end cover, can more effectually prevent that the foreign matter from getting into. The taper reverse cavity 10 is also arranged between the flow guide cover 2 and the backflow-preventing front gland 4, and practice shows that if foreign matters enter the cavity in the high-speed rotating process of the cavity, the foreign matters cannot easily enter the cavity from the taper hole due to the taper change of the cavity, and the cleanness of the inner part of the spindle chamber is also ensured, so that the spindle can run for a long time without losing precision or being damaged.
The utility model discloses a gaseous water conservancy diversion cavity and the reverse cavity of tapering that form between water conservancy diversion lid, anti-return gland and the inlet end cover structure, in the use, can effectually prevent that the main shaft is inside to be invaded by cutting fluid and foreign matter, even if the environment that makes the main shaft work is very good, because the protective screen that the gas field formed makes moisture and foreign matter can't enter into inside the main shaft to the long-term steady operation of main shaft has been guaranteed.
The above technical solutions of the present invention are only used for illustration and not for limitation, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a main shaft front end cover gas seal structure which characterized in that: the anti-backflow spindle comprises a flow guide cover (2), an air inlet end cover (3) and an anti-backflow gland (4), wherein the flow guide cover (2), the air inlet end cover (3) and the anti-backflow gland are sleeved at the front end of a spindle shaft core (1), the spindle shaft core (1) is arranged in a shaft hole of a shell (5), and the spindle shaft core (1) is rotatably connected with the shell (5) through a bearing (6) and a spacer bush (7); the spacer bush (7) comprises an inner spacer bush (701), an outer spacer bush (702) and a compression spacer bush (703), the left end of the bearing (6) is connected with the compression spacer bush (703) in a positioning mode, and the right end of the bearing is connected with the outer spacer bush (702) in a positioning mode through the inner spacer bush (701); the right end outer ring of the anti-backflow gland (4) is tightly connected with the shell (5), the right end inner ring is connected with the compression spacer sleeve (703) and the bearing (6) in a matching manner, the left end outer ring of the anti-backflow gland (4) is connected with the air inlet end cover (3), the left end inner ring is connected with the flow guide cover (2) in a matching manner, and the left end of the air inlet end cover (3) is connected to the outer ring of the flow guide cover (2); the air inlet end cover (3), the anti-backflow gland (4) and the shell (5) are all provided with air inlet holes and communicated with each other.
2. The hermetic sealing structure for the front end cover of the main shaft according to claim 1, wherein: be provided with water conservancy diversion lid counter bore (201) on the inner ring of water conservancy diversion lid (2), be provided with end cover counter bore (301) and end cover hole way (302) on the outer loop of inlet end cover (3), be provided with gland counter bore (401) and gland hole way (402) on the outer loop of anti-return gland (4), still be provided with the screw through-hole on the outer loop of anti-return gland (4) and through elasticity nut (8) fastening connection in on spindle core (1), be provided with casing screw (501) and casing hole way (502) on the outer loop of casing (5).
3. The hermetic sealing structure for the front end cover of the main shaft according to claim 2, wherein: the flow guide cover counter bore (201), the end cover counter bore (301), the gland cover counter bore (401) and the shell screw hole (501) are all arranged in parallel to the axis direction, and the threaded through hole is arranged in a direction perpendicular to the axis direction; the utility model discloses a set up the anti-reflux gland, including shell (5), water conservancy diversion lid (2) pass through water conservancy diversion lid counter bore (201) is by screw fixed connection in on elasticity nut (8), air inlet end cover (3) pass through end cover counter bore (301) are by screw fixed connection in on anti-reflux gland (4), anti-reflux gland (4) pass through gland counter bore (401) are by screw fixed connection in on the shell (5) outer loop in shell screw (501).
4. The hermetic sealing structure for the front end cover of the main shaft according to claim 2, wherein: the end cover hole path (302) is a right-angle through hole and is formed by connecting a vertical hole section with a horizontal hole section, the vertical hole section is arranged perpendicular to the axis direction, the lower end of the vertical hole section is an air outlet, the right end of the horizontal hole section is an air inlet and is connected with the gland hole path (402), and the horizontal hole section, the gland hole path (402) and the shell hole path (502) are all arranged in parallel to the axis direction, are positioned on the same axis and are communicated with each other.
5. The hermetic sealing structure for the front end cover of the main shaft according to claim 1, wherein: the air guide cover is characterized in that a conical convex ring (202) and a groove (203) are arranged on the right end outer ring of the air guide cover (2), an inner chamfer ring (303) and an outer chamfer ring (304) are arranged on the inner ring of the air inlet end cover (3), and a conical ring table (403) and a right-angle boss (404) are arranged on the left end inner ring of the anti-backflow gland cover (4).
6. The hermetic sealing structure for the front end cover of the main shaft according to claim 5, wherein: the right end of the flow guide cover (2) is connected to the inner ring at the left end of the anti-backflow gland (4) in a matched mode, the conical convex ring (202) is located on the conical ring table (403), and the conical ring table (403) is connected to the inner portion of the groove (203) in a matched mode; the right end of the air inlet end cover (3) is tightly attached to the outer ring of the left end of the anti-backflow gland (4), and the outer chamfer ring (304) is positioned on the right-angle boss (404); the left end inner ring of the air inlet end cover (3) is connected to the outer ring of the flow guide cover (2), and the inner chamfer ring (303) is connected to the outer ring of the conical convex ring (202).
7. The hermetic sealing structure for the front end cover of the main shaft according to claim 6, wherein: a gas guide cavity (9) is formed between the conical convex ring (202) on the outer ring of the guide cover (2) and the inner part of the inner chamfer ring (303) on the inner ring of the air inlet end cover (3); and a taper reverse cavity (10) is formed between the taper convex ring (202) and the groove (203) on the outer ring of the flow guide cover (2) and the interior of the taper ring table (403) on the inner ring of the anti-backflow gland (4).
8. The hermetic sealing structure for the front end cover of the main shaft according to claim 1, wherein: a convex ring gland (405) and a clamping ring (406) are arranged on the inner ring of the right end of the anti-backflow gland (4), the convex ring gland (405) is connected to the upper left end of the bearing (6), the compression spacer bush (703) is connected to the lower left end of the bearing (6), the outer spacer bush (702) is connected to the upper right end of the bearing (6), and the inner spacer bush (701) is connected to the lower right end of the bearing (6).
9. The hermetic sealing structure for the front end cover of the main shaft according to claim 8, wherein: the inner ring of the compressing spacer bush (703) is connected to the spindle shaft core (1), the outer ring of the compressing spacer bush (703) is provided with a clamping groove matched with the clamping ring (406), and the clamping ring (406) is matched and connected with the clamping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022736558.XU CN214092762U (en) | 2020-11-24 | 2020-11-24 | Spindle front end cover air-tight seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022736558.XU CN214092762U (en) | 2020-11-24 | 2020-11-24 | Spindle front end cover air-tight seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214092762U true CN214092762U (en) | 2021-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022736558.XU Active CN214092762U (en) | 2020-11-24 | 2020-11-24 | Spindle front end cover air-tight seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214092762U (en) |
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2020
- 2020-11-24 CN CN202022736558.XU patent/CN214092762U/en active Active
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