A high-sealing direct-drive motor for an air flow mill

Abstract

The utility model relates to a kind of high sealing direct drive motor for airflow mill, comprising: motor, the motor is provided with outer shell at its periphery, the motor center is provided with rotating shaft;Static seal disc, with the outer shell fixed connection, the static seal disc is provided with gas path ring rail at its lower end surface, the static seal disc is provided with gas source interface, the gas source interface is communicated to the gas path ring rail;Dynamic seal disc, with the rotating shaft fixed connection, the dynamic seal disc is set in the lower side of the static seal disc, the dynamic seal disc is provided with gas path ring channel at its upper end surface, the gas path ring rail and the gas path ring channel gap are set to form corresponding gas path flow channel, the outer ring opening of the gas path flow channel is set, external gas source is entered into the gas path flow channel from the outer ring of the gas path flow channel after the gas source interface, and it is blown outwards from the outer ring of the gas path flow channel.

Description

Technical Field

[0001] This utility model relates to the field of direct drive motors, specifically a high-sealing direct drive motor for air jet mills. Background Technology

[0002] A direct-drive motor is a motor that directly connects to the motion actuator, meaning the motor directly drives the machine without any intermediate mechanical transmission links. Direct-drive motors are commonly used in air classifier mills to directly drive the mixing device. Direct-drive motors used in air classifier mills require higher levels of sealing performance.

[0003] Existing direct-drive motor shaft extensions used in air jet mills are sealed with a single skeleton oil seal. This seal is prone to wear and failure after a period of operation, causing powder to spill out of the mixing tank, wasting raw materials. Simultaneously, powder entering the motor shaft exacerbates bearing wear. Furthermore, after the oil seal fails, motor bearing lubricating oil and other impurities will flow into the mixing tank, contaminating the material.

[0004] The purpose of this invention is to design a high-sealing direct-drive motor for air jet mills, addressing the problems existing in the prior art. Utility Model Content

[0005] In view of the problems existing in the prior art, the present invention provides a high-sealing direct-drive motor for air jet mills, which can effectively solve at least one of the problems existing in the prior art.

[0006] The technical solution of this utility model is:

[0007] A high-sealing direct-drive motor for air jet mills, comprising:

[0008] An electric motor, wherein the motor is provided with an outer casing and a rotating shaft is provided at the center of the motor;

[0009] A static sealing disc is fixedly connected to the outer shell. An air passage ring rail is provided on the lower end face of the static sealing disc. An air source interface is provided on the static sealing disc and the air source interface is connected to the air passage ring rail.

[0010] A dynamic sealing disc is fixedly connected to the rotating shaft. The dynamic sealing disc is located below the static sealing disc. An air passage is provided on the upper end face of the dynamic sealing disc. The gap between the air passage and the air passage forms a corresponding air flow channel. The outer ring of the air flow channel is open. An external air source enters the air flow channel through the air source interface and blows outward from the outer ring of the air flow channel.

[0011] Furthermore, the gas flow path includes several V-shaped folding structures.

[0012] Furthermore, a flow guide ring is provided between the top surface of one of the zigzag folded structures and the static sealing plate. The flow guide ring has multiple flow guide holes arranged at equal angles, and the flow guide ring is connected to the air source interface.

[0013] Furthermore, it includes a skeleton oil seal, in pairs, with the pair of skeleton oil seals fixedly installed back-to-back on the inner ring of the upper end face of the static sealing disc, and the inner ring of the skeleton oil seal is sleeved on the rotating shaft.

[0014] Furthermore, an oil seal pressure plate is provided on the upper end face of the static sealing disc, and the oil seal pressure plate is sleeved on the outer ring of the skeleton oil seal.

[0015] Furthermore, the skeleton oil seal is provided with a V-shaped opening, and the V-shaped openings of a pair of skeleton oil seals are arranged opposite to each other.

[0016] Furthermore, the V-shaped opening of the lower skeleton oil seal connects to the inner ring of the gas flow channel.

[0017] Furthermore, a bearing cover is provided in the area above the static sealing disc on the rotating shaft, a heat dissipation oil seal skeleton is provided inside the bearing cover, and the bearing cover is provided with an oil inlet and an oil outlet.

[0018] Therefore, this utility model provides the following effects and / or advantages:

[0019] This application sets a gap between the static sealing plate and the dynamic sealing plate, forming an air passage between them. At the same time, an external air source is introduced into the air passage to form an airflow that blows into the interior of the air mill, preventing dust from leaking to the outside through the air passage.

[0020] This application forms a secondary seal through an oil seal skeleton, which, together with the inner ring end of the air passage, creates a local positive pressure, so that the inner ring of the V-shaped opening is tightly attached to the rotating shaft, thereby enhancing the sealing effect.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0022] It should be understood that the above summary and the following detailed description of the present invention are exemplary and explanatory, and are intended to provide further explanation of the present invention as claimed. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0024] Figure 2This is a cross-sectional view of an embodiment of the present invention.

[0025] Figure 3 for Figure 2 A magnified view of part A.

[0026] Figure 4 This is a schematic diagram of the bottom surface of the static sealing plate.

[0027] Figure 5 This is a schematic diagram of the top surface of the dynamic sealing disc.

[0028] Figure 6 This is a schematic diagram of the gas flow path. Detailed Implementation

[0029] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings:

[0030] Example 1

[0031] refer to Figure 1-6 A high-sealing direct-drive motor 1 for air classifier mills, comprising:

[0032] Motor 1, the motor 1 is provided with an outer shell around its periphery, and a rotating shaft 11 is provided at the center of the motor 1;

[0033] A static sealing disc 2 is fixedly connected to the outer shell. The static sealing disc 2 has an air passage ring rail 21 on its lower end face. The static sealing disc 2 is provided with an air source interface 22, which is connected to the air passage ring rail 21.

[0034] The dynamic sealing disc 3 is fixedly connected to the rotating shaft 11. The dynamic sealing disc 3 is located below the static sealing disc 2. The dynamic sealing disc 3 has an air passage ring 31 on its upper end face. The air passage ring 21 and the air passage ring 31 are spaced to form a corresponding air passage. The outer ring of the air passage is open. After the external air source enters the air passage through the air source interface 22, it blows outward from the outer ring of the air passage.

[0035] In this embodiment, the static sealing disc 2 and the dynamic sealing disc 3 are air-sealed. The static sealing disc 2 has an interface for an external air source and is fixed to the end cover of the motor 1. The dynamic sealing disc 3 is fixed to the rotating shaft 11. A gap is created between the static sealing disc 2 and the dynamic sealing disc 3, forming an airflow channel between them. By continuously introducing gas into the airflow channel, a stable, outward-spraying air curtain barrier is formed around the rotating shaft 11. This barrier effectively prevents dust and particles from the external grinding chamber from invading the motor 1, solving the problem of abrasive wear on the motor 1 bearings. Simultaneously, the gap between the static sealing disc 2 and the dynamic sealing disc 3 prevents friction during rotation, eliminating additional frictional heat and power loss, thus ensuring the high efficiency of the motor 1.

[0036] Furthermore, the gas flow path includes several V-shaped folding structures.

[0037] Furthermore, a flow guide ring 4 is provided between the top surface of one of the zigzag folded structures and the static sealing plate 2. The flow guide ring 4 is provided with multiple flow guide holes arranged at equal angles, and the flow guide ring 4 is connected to the air source interface 22.

[0038] In this embodiment, the multiple zigzag folds increase the resistance to gas flow, allowing a higher-pressure external gas source to be connected to the gas source interface 22. This enables the gas to depressurize rapidly and instantly on the outer ring of the gas path, preventing dust from entering. Simultaneously, the guide ring 4 evenly distributes the gas entering the gas path across the entire circumference of the gas path ring 21, providing a uniform and reliable full-circumference sealing effect.

[0039] Furthermore, it includes a skeleton oil seal 5, in pairs, with the pair of skeleton oil seals 5 fixedly installed back-to-back on the inner ring of the upper end face of the static sealing disc 2, and the inner ring of the skeleton oil seal 5 is sleeved on the rotating shaft 11.

[0040] Furthermore, an oil seal pressure plate 6 is provided on the upper end face of the static sealing disc 2, and the oil seal pressure plate 6 is sleeved on the outer ring of the skeleton oil seal 5.

[0041] In this embodiment, the outer rings of a pair of skeleton oil seals 5 are fixedly installed on the upper end face of the static sealing disc 2 by the oil seal pressure plate, while the inner rings of the skeleton oil seals 5 are tightly attached to the rotating shaft 11, thereby forming a secondary sealing structure to prevent a small amount of dust from leaking outward after passing through the air passage.

[0042] Furthermore, the skeleton oil seal 5 is provided with a V-shaped opening, and the V-shaped openings of a pair of skeleton oil seals 5 are arranged opposite to each other.

[0043] Furthermore, the V-shaped opening of the lower skeleton oil seal 5 is connected to the inner ring of the gas flow channel.

[0044] In this embodiment, the V-shaped openings are arranged opposite to each other, with the lower skeleton oil seal 5 preventing dust from overflowing and the upper skeleton oil seal 5 preventing external impurities from entering the tank. Furthermore, the continuously blowing airflow creates a positive pressure zone at the V-shaped opening of the lower skeleton oil seal 5, causing the inner ring of the V-shaped opening to tightly adhere to the rotating shaft 11, thus enhancing the sealing effect.

[0045] Furthermore, a bearing cover 7 is provided in the area of ​​the rotating shaft 11 located on the upper side of the static sealing disk 2, and a heat dissipation oil seal skeleton 8 is provided inside the bearing cover 7. The bearing cover 7 is provided with an oil inlet 71 and an oil outlet 72.

[0046] In this embodiment, in order to ensure that the rotating shaft 11 is adequately lubricated and to prevent heat from the shaft extension from being conducted to the motor 1 and causing the motor 1 to overheat, the bearing cover has an oil drain port 71 and an oil inlet port 72. The bearing lubricating oil is circulated in the space between the bearing covers 7 by an oil pump, which lubricates the bearing of the motor 1 on the one hand and removes excess heat on the other hand, increasing the heat dissipation capacity of the motor 1. In order to prevent the lubricating oil from overflowing, the bearing cover 7 is equipped with a heat dissipation oil seal skeleton 8.

[0047] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. This invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0048] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A high seal direct drive motor for an air jet mill characterized by: include: An electric motor, wherein the motor is provided with an outer casing and a rotating shaft is provided at the center of the motor; A static sealing disc is fixedly connected to the outer shell. An air passage ring rail is provided on the lower end face of the static sealing disc. An air source interface is provided on the static sealing disc and the air source interface is connected to the air passage ring rail. A dynamic sealing disc is fixedly connected to the rotating shaft. The dynamic sealing disc is located below the static sealing disc. An air passage is provided on the upper end face of the dynamic sealing disc. The gap between the air passage and the air passage forms a corresponding air flow channel. The outer ring of the air flow channel is open. An external air source enters the air flow channel through the air source interface and blows outward from the outer ring of the air flow channel.

2. A high seal direct drive motor for an air jet mill according to claim 1, characterized in that: The gas flow path includes several V-shaped folding structures.

3. A high seal direct drive motor for an air jet mill according to claim 2, characterized in that: A flow guide ring is provided between the top surface of one of the zigzag folded structures and the static sealing plate. The flow guide ring has multiple flow guide holes arranged at equal angles and is connected to the air source interface.

4. A high seal direct drive motor for an air jet mill according to claim 1, characterized in that: It includes a skeleton oil seal, in pairs, with the pair of skeleton oil seals fixedly installed back-to-back on the inner ring of the upper end face of the static sealing disc, and the inner ring of the skeleton oil seal is sleeved on the rotating shaft.

5. A high seal direct drive motor for an air jet mill according to claim 4, characterized in that: An oil seal pressure plate is provided on the upper end face of the static sealing disc, and the oil seal pressure plate is sleeved on the outer ring of the skeleton oil seal.

6. A high seal direct drive motor for an air jet mill according to claim 4, characterized in that: The skeleton oil seal is provided with a V-shaped opening, and the V-shaped openings of a pair of skeleton oil seals are arranged opposite to each other.

7. A high seal direct drive motor for an air jet mill according to claim 1, characterized in that: The V-shaped opening of the lower skeleton oil seal connects to the inner ring of the gas passage.

8. A high seal direct drive motor for an air jet mill according to claim 1, characterized in that: A bearing cover is provided in the area above the static sealing plate on the rotating shaft. A heat dissipation oil seal skeleton is provided inside the bearing cover. The bearing cover is provided with an oil inlet and an oil outlet.

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