Permanent magnet synchronous oil-gas electric spindle with high sealing performance

Abstract

The utility model discloses a permanent magnet synchronous oil-gas motorized spindle with high sealing performance, which comprises a main body and a rotating shaft, a sealing shell is arranged at the end part of the main body and is positioned on the outer side of the rotating shaft, the structure of the sealing shell is improved, the left and right split butt joint structure is adopted, a flow guide wheel is arranged in a right split cavity, and an annular channel, an air inlet channel, an air outlet channel and the like are formed in the wall of the right split cavity. During assembly, the right split body is in butt joint with the end face of the main body, then the flow guide wheel is installed, and finally the left split body is installed, the overall structure is simplified, assembly forming is convenient, and the first sealing ring facilitates improvement of the sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to main shaft device technical field, concretely relates to high sealing permanent magnet synchronous oil gas electricity main shaft. BACKGROUND

[0002] Electric spindle is the common part in the field of numerical control machine tool, and the phenomenon of the gap between the self-rotating shaft and the end cover of the electric spindle being penetrated by the cooling liquid or the chipping particles exists when the electric spindle is used, and the damage speed of the electric spindle will be accelerated after long-term accumulation, for this, the patent file with the authorization announcement number CN221734824U proposes a sealing structure, a sealing shell is increased on the rotating shaft, a flow guide wheel and an inner sealing module butted with the flow guide wheel are installed in the sealing shell, the flow guide wheel is rotated through the outside airflow input, and then the airflow barrier is formed to improve the sealing property, and the defect lies in that: too many structure parts, and the assembly is relatively cumbersome, and improvement is needed. SUMMARY

[0003] In order to solve at least one of the above technical defects, the utility model provides the following technical scheme:

[0004] The application discloses a high-sealing permanent magnet synchronous oil-gas electric spindle, which comprises a main body and a rotating shaft, a sealing shell is arranged on the outer side of the rotating shaft at the end of the main body, a flow guide wheel is arranged in the cavity of the sealing shell, and the rotating shaft penetrates through the axial hole of the flow guide wheel, the sealing shell comprises a left part and a right part, the flow guide wheel is arranged in the cavity of the right part and is rotationally connected with the cavity wall of the right part, a ring channel, an air inlet channel and an air outlet channel are formed in the cavity of the right part behind the flow guide wheel, the air outlet channels are distributed at intervals in the circumferential direction, and the outlets of the air outlet channels face the flow guide wheel, the ring channel is connected with the air outlet channel and the air inlet channel, the inlet of the air inlet channel is arranged at the circumferential wall of the right part, and a sealing ring one is arranged between the cavity wall of the right part behind the flow guide wheel and the rotating shaft.

[0005] In the scheme, the structure of the sealing shell is improved, the left part and the right part are connected in a butt joint mode, the flow guide wheel is arranged in the cavity of the right part, and the ring channel, the air inlet channel and the air outlet channel are formed in the cavity wall of the right part, when assembling, the right part is butted with the end face of the main body, then the flow guide wheel is installed, and finally the left part is installed, so that the overall structure is simplified, assembly is facilitated, and the sealing ring one helps to improve the sealing property.

[0006] Further, the connection position of the left part and the right part is in front of the flow guide wheel, and the sealing property of the butt joint position is improved under the action of the flow guide wheel.

[0007] Further, the end of the left part extends into the cavity opening of the right part and is screw-connected, so that assembly is facilitated.

[0008] Further, the end face of the left part towards the right part is provided with a sealing ring two, and the sealing property is improved.

[0009] Furthermore, a sealing ring is provided at the end face of the right split body facing the main body, which helps to improve the sealing performance.

[0010] Furthermore, the guide wheel is connected to the bearing located on the right split cavity wall, which facilitates assembly.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model improves the sealing shell structure on the outside of the rotating shaft and the docking structure with the guide wheel, which facilitates assembly and helps to improve sealing performance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the electric spindle in Embodiment 1;

[0015] The attached figures are labeled as follows:

[0016] 1. Main body; 2. Rotating shaft; 3. Sealing shell; 4. Sealing ring one; 5. Sealing ring three; 6. Bearing; 7. Guide wheel; 31. Left split; 32. Right split; 33. Sealing ring two; 34. Air outlet; 35. Ring channel; 36. Air inlet; 37. Inlet; 71. Rotating ring; 72. Blade. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] like Figure 1 As shown, in this example, the high-sealing permanent magnet synchronous oil-gas electric spindle includes a main body 1 and a rotating shaft 2. A sealing shell 3 is installed on the outside of the rotating shaft 2 at the end of the main body 1. The rotating shaft 2 passes through the sealing shell 3. The sealing shell is cone-shaped as a whole, and the tail end of the sealing shell 3 is fixed to the end face shell of the main body 1. A guide wheel 7 is installed inside the cavity of the sealing shell 3, and the rotating shaft 2 passes through the axial hole of the guide wheel 7.

[0020] In this example, the sealing shell 3 includes a left split 31 and a right split 32, such as Figure 1As shown, the diameter of the front end cavity of the right part 32 is greater than the outer diameter of the flow guide wheel 7, and the diameter of the rear end cavity of the right part 32 is less than the outer diameter of the flow guide wheel 7, in this configuration, the flow guide wheel directly extends into the cavity from the front end cavity of the right part for installation. In this example, the bearing 6 is fixed at the cavity wall of the rear end cavity of the right part 32, the flow guide wheel is in the configuration of the cylindrical rotating ring 71 with the blades 72 fixed at the interval of the peripheral wall, and the rotating ring of the flow guide wheel 7 is fixed with the inner ring of the bearing 6, so that the flow guide wheel is connected with the right part in rotation.

[0021] The diameter of the cavity of the left part 31 towards the right part 32 can be selected according to requirements, such as ≥ the outer diameter of the flow guide wheel, or less than the outer diameter of the flow guide wheel, such as Figure 1 As shown, in this example, the diameter of the cavity of the left part 31 towards the right part 32 is greater than the outer diameter of the flow guide wheel 7. The right part 32 is formed with a ring channel 35, an air inlet channel 36, and an air outlet channel 34 in the cavity behind the flow guide wheel 7, such as the ring channel 35, the air inlet channel 36, and the air outlet channel 34 are integrally formed in the right part 32.

[0022] The rotating shaft 2 penetrates the ring opening of the ring channel 35, the air outlet channels 34 are uniformly distributed in the circumferential direction, the outlets of the air outlet channels 34 are towards the flow guide wheel 7, the ring channel 35 is connected with the air outlet channels 34 and the air inlet channel 36, the inlet of the air inlet channel 36 is at the peripheral wall of the right part 32, and in use, the inlet of the air inlet channel 36 is connected with the external gas conveying device, the input gas is sprayed from the air outlet channels through the ring channel, the flow guide wheel rotates under the blowing of the gas, and then guides the gas flow to the left side end of the sealed shell, so as to form a gas flow barrier between the cavity wall of the left part and the rotating shaft, avoiding the entry of cooling liquid, debris, etc.

[0023] In this example, the connection position of the left part 31 and the right part 32 is in front of the flow guide wheel 7, and a gas flow barrier can also be formed at the connection position under the driving of the flow guide wheel. For the connection of the left and right parts, such as the end of the left part 31 extends into the cavity opening of the right part 32 and is connected by screw thread engagement. The sealing ring two 33 can be arranged at the end surface of the left part 31 towards the right part 32, so that the sealing ring two abuts against the end surface of the right part, which helps to improve the sealing performance.

[0024] In this example, the sealing ring one 4 is installed between the cavity wall of the right part 32 behind the flow guide wheel 7 and the rotating shaft 2, such as Figure 1 As shown, two sealing rings one 4 are arranged at the interval in the axial direction, which further improves the sealing performance. In addition, the sealing ring three 5 can also be installed at the end surface of the right part 32 towards the end of the main body 1, so that the sealing ring three abuts against the end surface of the main body, which further improves the sealing performance.

[0025] In this configuration, the bearing can be pre-installed at the right part, then the flow guide wheel is connected with the right part, then the right part is connected with the main body, and finally the left part is installed, which simplifies the overall structure and facilitates assembly.

[0026] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical scheme falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application are also considered to be within the protection scope of the present application.

Claims

1. A high-sealing permanent magnet synchronous hydraulic-electric spindle, comprising a main body and a rotating shaft, wherein a sealing shell is provided at the end of the main body outside the rotating shaft, a guide wheel is provided inside the cavity of the sealing shell and the rotating shaft passes through the axial hole of the guide wheel, characterized in that, The sealing shell includes a left split and a right split. The guide wheel is located in the cavity of the right split and is rotatably connected to the cavity wall of the right split. An annular channel, an air inlet channel, and an air outlet channel are formed in the cavity of the right split behind the guide wheel. The air outlet channels are distributed circumferentially and the outlet of the air outlet channel faces the guide wheel. The annular channel is connected to the air outlet channel and the air inlet channel. The inlet of the air inlet channel is located at the peripheral wall of the right split. A sealing ring is provided between the cavity wall of the right split behind the guide wheel and the rotating shaft.

2. The high-sealing permanent magnet synchronous hydraulic-electric spindle as described in claim 1, characterized in that: The connection point between the left and right segments is located in front of the guide wheel.

3. The high-sealing permanent magnet synchronous hydraulic-electric spindle as described in claim 2, characterized in that: The end of the left split extends into the cavity of the right split and is threaded together.

4. The high-sealing permanent magnet synchronous hydraulic-electric spindle as described in claim 3, characterized in that: A second sealing ring is provided at the end face of the left split facing the right split.

5. The high-sealing permanent magnet synchronous hydraulic-electric spindle as described in claim 1, characterized in that: A sealing ring is provided at the end face of the right split facing the main body.

6. The high-sealing permanent magnet synchronous hydraulic-electric spindle as described in claim 1, characterized in that: The guide wheel is connected to a bearing located on the right split cavity wall.

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