Sealing device of motorized spindle

Abstract

The utility model discloses a sealing device of a motorized spindle, which comprises a fan, a rotor fixedly connected with the fan, a motorized spindle body fixedly connected with one end of the rotor, a fixed sealing sleeve fixedly connected with one end of the motorized spindle body, a rotating sealing sleeve fixedly connected with the other end of the motorized spindle body, and a cone arranged at one end of the rotating sealing sleeve. A conical groove is formed in one end of the fixed sealing sleeve, the cone rotates in the conical groove, a gap is reserved between the fixed sealing sleeve and the rotary sealing sleeve, the fixed sealing sleeve and the rotary sealing sleeve do not make direct contact, the rotor drives the fan in the fixed sealing sleeve to rotate, and the fan rotates at a high speed to blow out airflow to be discharged along the gap, so that liquid cannot enter the motorized spindle body along the gap. Therefore, loss caused by friction high temperature is avoided while sealing is guaranteed, the working efficiency of the electric rotating shaft is guaranteed, the operation cost is reduced, hot air generated during operation in the electric main shaft body can be exhausted, and the heat dissipation effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of main shaft sealing, specifically to a sealing device of electric spindle. BACKGROUND

[0002] The mechanical processing center electric spindle is a high-tech mechatronics product. The high-speed electric spindle needs to cool the workpiece with cutting fluid in the processing process. The splashing and flushing of the cutting fluid can easily enter the internal part of the electric spindle, causing damage to the internal bearing and stator of the electric spindle. Therefore, the sealing performance of the front end of the electric spindle directly affects the service life of the electric spindle. When a contact type sealing ring is used for sealing, high temperature is generated due to friction during the high-speed rotation of the electric spindle, which causes large wear of the sealing ring. The sealing ring needs to be replaced frequently to ensure the sealing effect, which not only reduces the working efficiency of the electric spindle but also increases the operation cost of the electric spindle. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] In order to solve the above-mentioned problems, the utility model is proposed.

[0005] Therefore, the purpose of the utility model is to provide a sealing device of electric spindle. The fixed sealing sleeve is fixed with the electric spindle body, the rotating sealing sleeve is fixed with the rotor and rotates together, the gap is left between the fixed sealing sleeve and the rotating sealing sleeve, and the two do not directly contact. The fan in the fixed sealing sleeve is driven to rotate by the rotor. The high-speed rotation of the fan blows out the airflow along the gap, so that the liquid cannot enter the electric spindle along the gap. Therefore, the sealing is ensured, and the wear caused by high temperature friction is avoided, the working efficiency of the electric spindle is ensured, and the operation cost is reduced.

[0006] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0007] A sealing device of electric spindle, which comprises a fan, the fan is fixedly connected with a rotor, one end of the rotor is fixedly connected with an electric spindle body, one end of the electric spindle body is fixedly connected with a fixed sealing sleeve, the fan is fixed in the fixed sealing sleeve, the other end of the electric spindle body is fixedly connected with a rotating sealing sleeve, one end is provided with a cone, one end of the fixed sealing sleeve is provided with a taper groove, and the cone rotates in the taper groove.

[0008] As a preferred scheme of the utility model of a kind of sealing device of electric main shaft, wherein, the third fixed plate is provided at one end of electric main shaft body, the first fixed plate is provided at one end of fixed sealing sleeve, a plurality of connecting holes are opened with equal distance between first fixed plate and third fixed plate, bolt is rotatably connected with the connecting hole on first fixed plate, nut is rotatably connected with bolt, and first fixed plate and third fixed plate are fixed by bolt and nut.

[0009] As a preferred scheme of the utility model of a kind of sealing device of electric main shaft, wherein, the second fixed plate is fixedly connected at one end of rotary sealing sleeve, the rotor is fixedly connected with two clamps, the two clamps are locked with rotor using bolt and nut, and the clamp is also fixedly connected with second fixed plate using bolt and nut.

[0010] As a preferred scheme of the utility model of a kind of sealing device of electric main shaft, wherein, the O-shaped ring is fixedly connected between rotary sealing sleeve and rotor.

[0011] As a preferred scheme of the utility model of a kind of sealing device of electric main shaft, wherein, the first gasket is fixedly connected between first fixed plate and third fixed plate

[0012] As a preferred scheme of the utility model of a kind of sealing device of electric main shaft, wherein, the second gasket is fixedly connected between second fixed plate and clamp.

[0013] As a preferred scheme of the utility model of a kind of sealing device of electric main shaft, wherein, the third gasket is fixedly connected between the two clamps.

[0014] As a preferred scheme of the utility model of a kind of sealing device of electric main shaft, wherein, the blocking assembly is fixedly connected at one end of rotary sealing sleeve.

[0015] As a preferred scheme of the utility model of a kind of sealing device of electric main shaft, wherein, the blocking assembly includes baffle, a plurality of telescopic rods are fixedly connected to the bottom surface of baffle, the other end of telescopic rod is fixedly connected to one end of rotary sealing sleeve, spring is fixedly connected to one end of rotary sealing sleeve, the other end of spring is fixedly connected to baffle, and spring passes through telescopic rod.

[0016] Compared with prior art, the utility model has the beneficial effects that fixed sealing sleeve is fixed with electric main shaft body, rotary sealing sleeve is fixed with rotor and rotates together, gap is left between fixed sealing sleeve and rotary sealing sleeve, they do not directly contact, rotor drives fan in fixed sealing sleeve to rotate, fan high-speed rotation blows out airflow along gap, so that liquid cannot enter electric main shaft along gap, thereby ensuring sealing, and also not producing loss due to friction high temperature, ensuring the working efficiency of electric rotating shaft and reducing operating cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the technical scheme of the embodiments of the present application more clear, the present application will be described in detail below with reference to the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. Among them:

[0018] Figure 1 It is a whole structure schematic diagram of the sealing device of the electric spindle of the present application;

[0019] Figure 2 It is a cross-sectional structure schematic diagram of the sealing device of the electric spindle of the present application;

[0020] Figure 3 It is a second whole structure schematic diagram of the sealing device of the electric spindle of the present application;

[0021] Figure 4 It is a sealing device of the electric spindle of the present application Figure 3 A structure schematic diagram in the present application.

[0022] In the figure: 1, fixed sealing sleeve; 101, first fixed plate; 102, taper groove; 2, rotating sealing sleeve; 201, cone; 202, second fixed plate; 3, fan; 4, electric spindle body; 401, third fixed plate; 5, rotor; 6, first gasket; 7, second gasket; 8, clamp; 9, third gasket; 10, O-ring; 11, baffle; 12, telescopic rod; 13, spring; 14, bolt; 15, nut. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0024] Secondly, the present application is described in detail in combination with the schematic diagram. In order to facilitate the description, the cross-sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0025] In order to make the purposes, technical schemes and advantages of the present application more clear, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0026] The utility model provides a kind of sealing device of electric spindle, clearance is left in fixed sealing sleeve 1 and rotating sealing sleeve 2, they do not directly contact, rotor 5 drives fan 3 in fixed sealing sleeve 1 rotation, fan 3 high-speed rotation blows out airflow along clearance discharge, so that liquid cannot enter electric spindle body 4 along clearance, to ensure sealing while also not because of friction high temperature and produce loss, ensure the working efficiency of electric rotating shaft and reduce operating cost.

[0027] Figures 1-4 It is shown that the overall structure schematic diagram of one embodiment of the utility model a kind of sealing device of electric spindle, please refer to Figures 1-4 The utility model provides a kind of sealing device of electric spindle, including fan 3, fan 3 is fixedly connected with rotor 5, one end of rotor 5 is fixedly connected with electric spindle body 4, one end of electric spindle body 4 is fixedly connected with fixed sealing sleeve 1, fan 3 is fixed in fixed sealing sleeve 1, the other end of electric spindle body 4 is fixedly connected with rotating sealing sleeve 2, one end is provided with cone 201, one end of fixed sealing sleeve 1 is provided with taper groove 102, cone 201 rotates in taper groove 102, fixed sealing sleeve 1 is fixed with electric spindle body 4 so as not to rotate, rotating sealing sleeve 2 is fixed with rotor 5 and rotates along with the rotation of rotor 5, taper groove 102 of one end of fixed sealing sleeve 1 is provided with the slight clearance with the cone 201 of one end of rotating sealing sleeve 2, when rotating sealing sleeve 2 rotates, it does not contact with fixed sealing sleeve 1, so as not to produce loss because of friction high temperature, improve durability, fan 3 rotates along with the rotation of rotor 5, fan 3 high-speed rotation generates airflow, airflow is discharged at high speed along the clearance between taper groove 102 and cone 201 and forms gas film and expels liquid outside the device, to ensure sealing, can also expel hot gas generated when running in electric spindle body 4, play heat dissipation effect.

[0028] One end of electric spindle body 4 is provided with third fixed plate 401, one end of fixed sealing sleeve 1 is provided with first fixed plate 101, a plurality of connecting holes are equidistantly arranged on first fixed plate 101 and third fixed plate 401, connecting hole on first fixed plate 101 and 104 is rotationally connected with bolt 14, bolt 14 is rotationally connected with nut 15, bolt 14 and nut 15 fix first fixed plate 101 and third fixed plate 401, after bolt 14 passes through connecting hole on first fixed plate 101 and third fixed plate 401, tighten nut 15 and bolt 14 to fix fixed sealing sleeve 1 and electric spindle body 4 firmly together.

[0029] The second fixed plate 202 is fixedly connected with the rotating sealing sleeve 2 at one end, the rotor 5 is fixedly connected with two clamps 8, the two clamps 8 are locked with the rotor 5 by using bolts 14 and nuts 15, the clamps 8 are also fixedly connected with the second fixed plate 202 by using bolts 14 and nuts 15, after the two clamps 8 clamp the rotor 5, the rotating sealing sleeve 2 is tightened by using bolts 14 and nuts 15, so that the clamps 8 are fixed with the motor shaft body 4, and then the side wall of the clamp 8 is fixed with the second fixed plate 202 by using bolts 14 and nuts 15, so that the rotating sealing sleeve 2 and the rotor 5 are finally fixed together.

[0030] The O-shaped ring 10 is fixedly connected between the rotating sealing sleeve 2 and the rotor 5, which further improves the sealing effect of the rotating sealing sleeve 2 and the rotor 5.

[0031] The first gasket 6 is fixedly connected between the first fixed plate 101 and the third fixed plate 401, which further improves the sealing effect of the fixed sealing sleeve 1 and the motor shaft body 4, and prevents liquid from penetrating into the motor shaft body 4 from the connection.

[0032] The second gasket 7 is fixedly connected between the second fixed plate 202 and the clamp 8, which further improves the sealing effect of the clamp 8 and the rotating sealing sleeve 2.

[0033] The third gasket 9 is fixedly connected between the two clamps 8, which further improves the sealing effect of the clamp 8 and the rotor 5.

[0034] In combination Figures 1-4 , the sealing device of the electric spindle in the embodiment is used as follows: after the bolts 14 pass through the connecting holes on the first fixed plate 101 and the third fixed plate 401, the nuts 15 are tightened on the bolts 14 to firmly fix the fixed sealing sleeve 1 and the motor shaft body 4 together, so that the fixed sealing sleeve 1 does not rotate, after the two clamps 8 clamp the rotor 5, the rotating sealing sleeve 2 is tightened by using bolts 14 and nuts 15, so that the clamps 8 are fixed with the motor shaft body 4, and then the side wall of the clamp 8 is fixed with the second fixed plate 202 by using bolts 14 and nuts 15, so that the rotating sealing sleeve 2 and the rotor 5 are finally fixed together, so that the rotor 5 rotates to drive the rotating sealing sleeve 2 to rotate, the taper groove 102 provided at one end of the fixed sealing sleeve 1 and the taper 201 provided at one end of the rotating sealing sleeve 2 have a small gap, the rotating sealing sleeve 2 does not contact the fixed sealing sleeve 1 when rotating, so that wear due to high temperature caused by friction is avoided, the durability is improved, the fan 3 rotates with the rotation of the rotor 5, the fan 3 rotates at high speed to generate airflow, the airflow is discharged at high speed along the gap between the taper groove 102 and the taper 201 to form an air film to discharge liquid outside the device, so as to ensure the sealing property, and the hot gas generated during operation in the motor shaft body 4 is discharged to achieve the heat dissipation effect.

[0035] In the embodiment, when the motor shaft body 4 is not running, the fan 3 will not rotate with the rotor 5, and the gap between the fixed sealing sleeve 1 and the rotating sealing sleeve 2 will not have high-speed airflow, at this time, the liquid can flow into the fixed sealing sleeve 1 from the gap and then enter the motor shaft to cause damage, therefore, please refer to Figures 1-4 In the embodiment, one end of the rotating sealing sleeve 2 is fixedly connected with a blocking assembly, the blocking assembly comprises a baffle 11, the bottom surface of the baffle 11 is fixedly connected with a plurality of telescopic rods 12, the other end of the telescopic rod 12 is fixedly connected with one end of the rotating sealing sleeve 2, one end of the rotating sealing sleeve 2 is fixedly connected with a spring 13, the other end of the spring 13 is fixedly connected with the baffle 11, the spring 13 passes through the telescopic rod 12, when the motor shaft body 4 is not running, the rotor 5 does not rotate at high speed, at this time, the baffle 11 is in contact with the gap between the taper groove 102 and the taper 201 under the action of the spring, the gap is blocked to ensure sealing, when the motor shaft body 4 is running, the rotor 5 drives the fan 3 to run to generate high-speed airflow, the airflow pushes the baffle 11 away along the gap, at this time, the telescopic rod 12 and the spring 13 are compressed, the gap between the taper groove 102 and the taper 201 starts to pass through the high-speed airflow, ensuring that the sealing can be maintained when the motor shaft body 4 is not running, preventing the liquid from entering the motor shaft body 4 to cause damage.

[0036] Although the utility model has been described above with reference to the embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model. In particular, as long as there is no structural conflict, the features in the embodiments disclosed by the utility model can be combined in any way, and the combinations are not described in this specification due to the consideration of saving space and resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sealing device of an electric spindle, characterized by, Including fan (3), the fan (3) is fixedly connected with rotor (5), one end of the rotor (5) is fixedly connected with electric spindle body (4), one end of the electric spindle body (4) is fixedly connected with fixed sealing sleeve (1), the fan (3) is fixed in fixed sealing sleeve (1), the other end of the electric spindle body (4) is fixedly connected with rotating sealing sleeve (2), one end is provided with cone (201), the fixed sealing sleeve (1) one end is provided with taper groove (102), the cone (201) rotates in taper groove (102).

2. A sealing device for an electric spindle as claimed in claim 1, characterized in that One end of the rotating sealing sleeve (2) is fixedly connected with a blocking assembly.

3. A sealing device for an electric spindle according to claim 2, characterized in that The blocking assembly includes a baffle (11), a plurality of telescopic rods (12) are fixedly connected to the bottom surface of the baffle (11), the other end of the telescopic rod (12) is fixedly connected to one end of the rotating sealing sleeve (2), the rotating sealing sleeve (2) is fixedly connected with a spring (13) at one end, the other end of the spring (13) is fixedly connected to the baffle (11), and the spring (13) passes through the telescopic rod (12).

4. A sealing device for an electric spindle according to claim 3, characterized in that The electric spindle body (4) is provided with a third fixed plate (401) at one end, the fixed sealing sleeve (1) is provided with a first fixed plate (101) at one end, a plurality of connecting holes are formed in the first fixed plate (101) and the third fixed plate (401) at equal distances, the first fixed plate (101) is rotatably connected with a bolt (14) through the connecting holes on the third fixed plate (401), the bolt (14) is rotatably connected with a nut (15), and the bolt (14) and the nut (15) fix the first fixed plate (101) and the third fixed plate (401).

5. A sealing device for an electric spindle as claimed in claim 4, characterized in that The rotating sealing sleeve (2) is fixedly connected with a second fixed plate (202) at one end, the rotor (5) is fixedly connected with two clamps (8), the two clamps (8) are locked with the rotor (5) by using a bolt (14) and a nut (15), and the clamp (8) is fixedly connected with the second fixed plate (202) by using a bolt (14) and a nut (15).

6. A sealing device for an electric spindle according to claim 5, characterized in that An O-shaped ring (10) is fixedly connected between the rotating sealing sleeve (2) and the rotor (5).

7. A sealing device for an electric spindle according to claim 6, characterized in that A first gasket (6) is fixedly connected between the first fixed plate (101) and the third fixed plate (401).

8. A sealing device for an electric spindle according to claim 7, characterized in that A second gasket (7) is fixedly connected between the second fixed plate (202) and the clamp (8).

9. A sealing device for an electric spindle according to claim 8, characterized in that A third gasket (9) is fixedly connected between the two clamps (8).

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