CN214999383U

CN214999383U - Main shaft with air sealing structure

Info

Publication number: CN214999383U
Application number: CN202120941963.7U
Authority: CN
Inventors: 柳龙
Original assignee: Yazi Technology Co ltd
Current assignee: Yazi Technology Co ltd
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-12-03
Anticipated expiration: 2031-05-06

Abstract

The utility model belongs to the field of spindle sealing, and particularly discloses a spindle with an air sealing structure, which comprises a spindle box and a spindle body arranged in the spindle box, wherein an airtight chamber is reserved at the position corresponding to a bearing in the spindle box; a sealing component is embedded in the airtight chamber in front of the bearing, and a turbine blade is arranged on the periphery of the main shaft body in front of the sealing component; an air inlet channel is reserved on one side of the inner wall of the spindle box, an exhaust pipeline is embedded in the inner wall of the other side of the spindle box, one end of the air inlet channel is communicated with an airtight chamber in front of the turbine blade, the other end of the air inlet channel is connected to the outside of the spindle box, and a drying filter box communicated with the middle of the air inlet channel is embedded in the spindle box. Arranging an airtight chamber at the periphery of the bearing, rotating a turbine blade, forming negative pressure in the airtight chamber, and forming air seal for the seal assembly; the sealing rings are stacked in multiple layers, and can be expanded outwards under pressure when being subjected to air pressure, so that a more stable sealing effect is formed on the main shaft; can regularly change the dry filtration structure of inside, it is convenient to maintain.

Description

Main shaft with air sealing structure

Technical Field

The utility model relates to a main shaft seal field specifically is a take air seal structure's main shaft.

Background

A spindle of a numerical control machine tool, which is an extremely important working part of the numerical control machine tool, bears the main operation of the machine tool, and a spindle used in a spindle device of the machine tool is inserted into a housing and supported by bearings so as to be rotatable with respect to the housing. In order to ensure a good sealing effect between the bearing and the main shaft, a sealing structure is generally provided outside the bearing to prevent coolant, foreign matter, and the like from entering through a gap between the housing and the main shaft and reaching the bearing. The sealing effect of the existing sealing structure is not ideal enough, and the maintenance is difficult.

Disclosure of Invention

An object of the utility model is to provide a take air seal structure's main shaft to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a main shaft with an air sealing structure comprises a main shaft box and a main shaft body arranged in the main shaft box, wherein a bearing for mounting the main shaft body is arranged at the extending part of the main shaft body in the main shaft box, and an airtight chamber is reserved at the position, corresponding to the bearing, in the main shaft box; the direction of the main shaft body extending out of the main shaft box is defined as the front, a sealing component is embedded in the airtight chamber in front of the bearing, and a turbine blade is arranged on the periphery of the main shaft body in front of the sealing component; an air inlet channel is reserved on one side of the inner wall of the spindle box, an exhaust pipeline is embedded in the inner wall of the other side of the inner wall of the spindle box, one end of the air inlet channel is communicated with an airtight chamber in front of the turbine blade, the other end of the air inlet channel is connected to the outside of the spindle box, and a drying filter box communicated with the middle of the air inlet channel is embedded in the spindle box.

Preferably, the seal assembly comprises a seal block attached to the bearing and a plurality of seal rings disposed in front of the seal block.

Preferably, each sealing ring is stacked and sleeved on the main shaft body, the inner wall of each sealing ring is attached to the main shaft body, the outer side wall of each sealing ring is attached to the inner wall of the airtight chamber, and the inside of each sealing ring is of a hollow structure.

Preferably, the outer part of the main spindle box is provided with an air guide cover communicated with the outer end of the air inlet channel.

Preferably, the top surface of the drying and filtering box is open and is provided with a box cover, a plurality of filter screen layers and drying agent layers are alternately arranged in the drying and filtering box, and the box cover is fixed on the spindle box through bolts.

Preferably, one end of the exhaust pipeline is connected to the airtight chamber between the turbine blade and the sealing assembly, the other end of the exhaust pipeline is communicated with the outside of the spindle box, and the exhaust pipeline is provided with a one-way check valve.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a set up airtight chamber in the bearing periphery to installation turbine blade on main shaft body can drive turbine blade and rotate in the high-speed rotatory of main shaft, forms the negative pressure in airtight chamber, thereby can be through inlet channel with the outside air introduce airtight chamber in, form air-tight to seal assembly.

2. The sealing assembly is provided with a plurality of layers of stacked sealing rings, the interior of the sealing assembly is of a hollow structure, the sealing assembly has good expansion expansibility, and can be expanded outwards under pressure when being subjected to air pressure, so that a more stable sealing effect is formed on the main shaft; the exhaust pipeline is provided with a one-way check valve to form one-way circulation of air flow and ensure stable air sealing state in the airtight chamber.

3. The filter box is embedded in the spindle box, the introduced air is dried and filtered, the spindle is protected, the detachable box cover is arranged outside the spindle box, the internal drying and filtering structure can be replaced regularly, and the spindle box is convenient to maintain.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the drying and filtering box of the present invention.

In the figure: 1. a main spindle box; 2. a main shaft body; 3. a bearing; 4. an airtight chamber; 5. a sealing block; 6. a seal ring; 7. a turbine blade; 8. an air intake passage; 9. a gas guide hood; 10. drying the filter cartridge; 11. a filter screen layer; 12. a desiccant layer; 13. a box cover; 14. a bolt; 15. an exhaust duct; 16. a one-way check valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: a main shaft with an air sealing structure comprises a main shaft box 1 and a main shaft body 2 arranged in the main shaft box 1, wherein a bearing 3 for mounting the main shaft body 2 is arranged at the extending part of the main shaft body 2 in the main shaft box 1, and an airtight chamber 4 is reserved at the position, corresponding to the bearing 3, in the main shaft box 1; the direction that the main shaft body 2 extends out of the main shaft box 1 is defined as the front, a sealing component is embedded in the airtight chamber 4 in front of the bearing 3, and a turbine blade 7 is arranged on the periphery of the main shaft body 2 in front of the sealing component; an air inlet channel 8 is reserved on one side of the inner wall of the spindle box 1, an exhaust pipeline 15 is embedded in the inner wall of the other side of the spindle box 1, one end of the air inlet channel 8 is communicated with the airtight chamber 4 in front of the turbine blade 7, the other end of the air inlet channel is connected to the outside of the spindle box 1, and a drying filter box 10 communicated with the middle of the air inlet channel 8 is embedded in the spindle box 1.

Further, the sealing assembly comprises a sealing block 5 attached to the bearing 3 and a plurality of sealing rings 6 arranged in front of the sealing block 5.

Further, each sealing ring 6 is stacked and sleeved on the main shaft body 2, the inner wall of each sealing ring 6 is attached to the main shaft body 2, the outer side wall of each sealing ring is attached to the inner wall of the airtight chamber 4, and the inside of each sealing ring 6 is of a hollow structure.

Further, the spindle box 1 is externally provided with an air guide cover 9 communicated with the outer end of the air inlet channel 8.

Furthermore, the top surface of the drying and filtering box 10 is open and is provided with a box cover 13, a plurality of filter screen layers 11 and drying agent layers 12 are alternately arranged in the drying and filtering box 10, and the box cover 13 is fixed on the spindle box 1 through a bolt 14.

Further, one end of the exhaust pipeline 15 is connected to the airtight chamber 4 between the turbine blade 7 and the sealing component, the other end of the exhaust pipeline is communicated with the outside of the main spindle box 1, and a one-way check valve 16 is installed on the exhaust pipeline 15. .

The working principle is as follows: when the main shaft body 2 operates, the turbine blades 7 in the airtight chamber 4 are driven to rotate at a high speed, negative pressure is formed in the airtight chamber 4, external air is led into the airtight chamber 4 through the air inlet channel 8 to form air seal for the sealing assembly, then the air is discharged from the exhaust pipeline 15, the one-way check valve 16 is installed on the exhaust pipeline 15 to form one-way circulation of air flow, and a stable air sealing state in the airtight chamber 4 is guaranteed.

The sealing assembly comprises a sealing block 5 and a plurality of sealing rings 6 which are stacked, the interior of each sealing ring 6 is of a hollow structure, the sealing rings have good expansion expansibility, and when air pressure is applied, the sealing rings can be pressed to expand outwards to extrude the main shaft and the inner wall of the airtight chamber 4, so that the sealing assemblies are tightly attached to form a more stable sealing effect.

The spindle box 1 is internally embedded with a drying and filtering box 10 for drying and filtering the introduced air and protecting the spindle body 2, and a detachable box cover 13 is arranged outside the spindle box, so that the filter screen layer 11 and the drying agent layer 12 inside the spindle box can be replaced regularly, and the spindle box is convenient to maintain.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A main shaft with an air sealing structure comprises a main shaft box (1) and a main shaft body (2) installed in the main shaft box (1), and is characterized in that a bearing (3) for installing the main shaft body (2) is arranged at the extending part of the main shaft body (2) in the main shaft box (1), and an airtight chamber (4) is reserved at the position, corresponding to the bearing (3), in the main shaft box (1); the direction that the main shaft body (2) extends out of the main shaft box (1) is defined as the front, a sealing component is embedded in the airtight chamber (4) in front of the bearing (3), and a turbine blade (7) is arranged on the periphery of the main shaft body (2) in front of the sealing component; an air inlet channel (8) is reserved on one side of the inner wall of the spindle box (1), an exhaust pipeline (15) is embedded in the inner wall of the other side of the spindle box (1), one end of the air inlet channel (8) is communicated with an air tight chamber (4) in front of the turbine blade (7), the other end of the air inlet channel is connected to the outside of the spindle box (1), and a drying filter box (10) communicated with the middle of the air inlet channel (8) is embedded in the spindle box (1).

2. A spindle with an air sealing structure according to claim 1, wherein: the sealing assembly comprises a sealing block (5) attached to the bearing (3) and a plurality of sealing rings (6) arranged in front of the sealing block (5).

3. A spindle with an air sealing structure according to claim 2, wherein: each sealing ring (6) is stacked and sleeved on the main shaft body (2), the inner wall of each sealing ring (6) is attached to the main shaft body (2), the outer side wall of each sealing ring is attached to the inner wall of the airtight chamber (4), and the inside of each sealing ring (6) is of a hollow structure.

4. A spindle with an air sealing structure according to claim 1, wherein: and a gas guide cover (9) communicated with the outer end of the gas inlet channel (8) is arranged outside the spindle box (1).

5. A spindle with an air sealing structure according to claim 1, wherein: the top surface of the drying and filtering box (10) is open and is provided with a box cover (13), a plurality of layers of filtering net layers (11) and drying agent layers (12) are alternately arranged in the drying and filtering box (10), and the box cover (13) is fixed on the spindle box (1) through bolts (14).

6. A spindle with an air sealing structure according to claim 1, wherein: one end of the exhaust pipeline (15) is connected to the airtight chamber (4) between the turbine blade (7) and the sealing component, the other end of the exhaust pipeline is communicated with the outside of the spindle box (1), and the exhaust pipeline (15) is provided with a one-way check valve (16).