Rotor transmission assembly

Abstract

The utility model relates to a rotor transmission assembly in the technical field of mechanical equipment, which comprises a rotor and a protective sleeve, and the rotor penetrates through the center of the protective sleeve and is rotatably connected with the protective sleeve; the protective sleeve sequentially comprises a sealing fiber layer, a fireproof fiber layer and a fireproof pouring layer from top to bottom, the thickness of the sealing fiber layer is 80-90 mm, and the thickness of the fireproof pouring layer is 75-85 mm. The protective sleeve is reasonable in structure and good in sealing effect, the strength of the protective sleeve is improved due to the arrangement of the fireproof pouring layer, the service life is long, application of the protective sleeve in the degassing box is facilitated, and the degassing efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment, and particularly relates to a rotor transmission assembly. Background Art

[0002] During the melting process of aluminum and its alloys, due to the entry of moisture in the air and the introduction of organic substances such as oil stains on the surface of aluminum ingots, hydrogen elements inevitably exist in the aluminum melt. During the subsequent casting and cooling process, the solubility of hydrogen in aluminum decreases rapidly, and hydrogen bubbles precipitate from the aluminum in the form of hydrogen gas, forming pores, which seriously affect the product quality. Therefore, after melting and before casting, it is necessary to degas (remove hydrogen) the aluminum melt. Currently, most use the technology of inert gas rotary spraying for degassing treatment of aluminum melt. The core component of this technology is a hollow rotating rod with a rotating nozzle at one end, that is, the rotor. When in use, it is inserted into the aluminum or aluminum alloy melt, and inert gas (such as argon / nitrogen) is blown in through its middle channel and ejected from the rotating nozzle at the bottom of the rotor. The formed bubbles are broken into a large number of small bubbles due to the high-speed rotation of the nozzle. Hydrogen in the aluminum melt will attach to these small bubbles and precipitate as hydrogen gas, and at the same time, adsorb impurity particles in the aluminum melt and float to the liquid surface together, so as to achieve the purpose of degassing (removing hydrogen) and purification. In the prior art, when the rotor is used in cooperation with the degassing tank, the following problems exist: 1. The sealing layer between the rotor and the protective sleeve of the original rotor transmission assembly is relatively thin. After using for a short time, gaps appear, resulting in air entering the degassing tank body. When the air contacts the aluminum melt, the hydrogen content in the aluminum melt increases, which is not conducive to removing hydrogen from the aluminum melt; 2. The structure of the protective sleeve is easy to be damaged during the cleaning and maintenance by workers, and air is more likely to enter the degassing tank from the protective sleeve, and the service life of the protective sleeve is short. Therefore, a rotor transmission assembly is needed to solve the above technical problems. Summary of the Utility Model

[0003] In view of the above defects existing in the prior art, the utility model provides a rotor transmission assembly, including a rotor and a protective sleeve. The rotor passes through the center of the protective sleeve and is rotationally connected with the protective sleeve; the protective sleeve sequentially includes a sealing fiber layer, a refractory fiber layer and a refractory casting layer from top to bottom. The thickness of the sealing fiber layer is 80 - 90 mm, and the thickness of the refractory casting layer is 75 - 85 mm.

[0004] Preferably, the rotor includes a rotating rod and an impeller. The impeller is fixed at the lower end of the rotating rod. A first air guiding cavity is arranged in the rotating rod, and the first air guiding cavity coincides with the central axis of the rotating rod. A second air guiding cavity is arranged in the impeller, and the second air guiding cavity is communicated with the first air guiding cavity through an air inlet hole. An air outlet hole is arranged on the impeller, and the air outlet hole is communicated with the second air guiding cavity.

[0005] Preferably, the impeller includes an upper fixing disk and a lower fixing disk. The upper fixing disk and the lower fixing disk are fixedly connected through a gas distribution pipe. The upper fixing disk is fixedly connected to the lower end of the rotating rod. The air inlet hole is located at the center of the upper fixing disk. A plurality of the air outlet holes are evenly distributed along the circumferential direction of the side wall of the gas distribution pipe. An arc-shaped baffle is arranged at each air outlet hole, and the baffle is fixedly connected to the outer wall of the gas distribution pipe.

[0006] Preferably, the thickness of the impeller is not less than 60 mm.

[0007] Preferably, the outer diameter of the rotating rod is not less than 80 mm.

[0008] The present utility model further includes other components that can enable a rotor transmission assembly to be used normally, which are all conventional technical means in the art. In addition, for the devices or components not defined in the present utility model, such as the sealing fiber layer, refractory fiber layer, and refractory casting layer, etc., conventional technical means and conventional equipment in the art are adopted.

[0009] The beneficial effects of the present utility model are as follows: The structure is reasonable, the sealing effect of the protective sleeve is good, and the setting of the refractory casting layer improves the strength and prolongs the service life of the protective sleeve; the setting of the impeller improves the dispersion ability during its rotation, making the gas discharged from the air outlet holes more finely and evenly dispersed. The overall structural strength of the rotating rod is high and the service life is long, which is beneficial to its application in the degassing tank and improves the degassing efficiency. Description of the Drawings

[0010] The present utility model will be further described below with reference to the drawings and embodiments.

[0011] Figure 1 It is a schematic structural diagram of a rotor transmission assembly in a degassing tank in an embodiment of the present utility model;

[0012] Figure 2 is Figure 1 the enlarged view of A in

[0013] Figure 3 is Figure 1 the enlarged view of the impeller in

[0014] Figure 4 is Figure 3 the cross-sectional view taken along the line B-B in

[0015] In the figure: 1, motor; 2, intake pipe; 3, sealing fiber layer; 4, refractory fiber layer; 5, refractory casting layer; 6, box cover; 7, box body; 8, aluminum melt; 9, bubbles; 10, rotating rod; 11, lower fixing disk; 12, air outlet hole; 13, bracket; 14, gas guide cavity I; 15, upper fixing disk; 16, gas distribution pipe; 17, baffle; 18, air inlet hole. Detailed Embodiments

[0016] The present utility model will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present utility model and specific embodiments. The description here is only used to explain the present utility model, but not to limit the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present utility model.

[0017] Embodiment

[0018] As Figures 1-4 shown, the present utility model provides a rotor drive assembly, including a rotor and a protective sleeve. The rotor passes through the center of the protective sleeve and is rotatably connected to the protective sleeve. The protective sleeve successively includes a sealing fiber layer 3 (made of ceramic fiber blanket), a refractory fiber layer 4 (made of ceramic fiber board), and a refractory casting layer 5 (made of high silica 2.0 material) from top to bottom. The thickness of the sealing fiber layer is 85 mm, and the thickness of the refractory casting layer is 80 mm.

[0019] The rotor includes a rotating rod 10 and an impeller. Both the rotating rod 10 and the impeller are made of silicon nitride. The impeller is fixed to the lower end of the rotating rod 10. A first air guide cavity 14 is provided in the rotating rod 10, and the first air guide cavity 14 coincides with the central axis of the rotating rod 10. A second air guide cavity is provided in the impeller, and the second air guide cavity communicates with the first air guide cavity 14 through an air inlet hole 18. An air outlet hole 12 is provided on the impeller, and the air outlet hole 12 communicates with the second air guide cavity.

[0020] The outer diameter of the rotating rod 10 is 80 mm, and the thickness of the impeller is 60 mm. The impeller includes an upper fixing plate 15 and a lower fixing plate 11. The upper fixing plate 15 and the lower fixing plate 11 are fixedly connected by a gas distribution pipe 16. The upper fixing plate 15 is fixedly connected to the lower end of the rotating rod 10. The air inlet hole 18 is located at the center of the upper fixing plate 15. A plurality of the air outlet holes 12 are evenly distributed circumferentially along the side wall of the gas distribution pipe 16. An arc-shaped baffle 17 is provided at each air outlet hole 12, and the baffle 17 is fixedly connected to the outer wall of the gas distribution pipe 16. In the prior art, the rotating rod and the impeller of the rotor have weak ability to disperse inert gas, which is not conducive to degassing. The strength of the impeller is also low, easy to damage, and has a short service life. The setting here can make the bubbles 9 generated by the gas discharged from the air outlet holes 12 more fine and uniform when the impeller rotates, and at the same time enhance the strength of the impeller and the rotating rod and improve the service life.

[0021] Working principle: During operation, the protective sleeve is fixed on the cover 6 of the degassing tank. The aluminum melt 8 to be degassed is placed in the tank body 7 of the degassing tank. The top of the rotating rod 10 is connected with a motor 1, and the motor 1 is fixed on the cover 6 through a bracket 13. The first gas guide cavity 14 is connected with an inlet pipe 2. The process gas (argon / nitrogen) enters the first gas guide cavity of the rotating rod through the inlet pipe, and then enters the aluminum melt in the tank body through the second gas guide cavity and the air outlet holes. During normal production, the protective sleeve remains stationary, and the rotating rod rotates at a high speed under the action of the motor. The impeller disperses the process gas into small bubbles and distributes them into the aluminum melt. During the upward movement of the small bubbles of the process gas, the hydrogen in the aluminum melt is carried out of the aluminum melt, achieving the purpose of removing hydrogen. In this embodiment, the setting of the impeller improves its ability to disperse the process gas, and more and smaller small bubbles of the process gas can be obtained, which can carry away more hydrogen and improve the degassing efficiency. The sealing fiber layer between the protective sleeves is 85 mm thick, which can prevent air from entering the tank body for a long time and avoid the aluminum melt from combining with the hydrogen in the air. The refractory casting layer with a thickness of 80 mm at the bottom of the protective sleeve can prevent damage during cleaning by workers and also prevent air from entering the tank body from the damaged part. At the same time, the hydrogen removal efficiency has been increased from the original 60% to the current 63%-65%.

[0022] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotor transmission assembly, comprising a rotor and a protective sleeve, wherein the rotor passes through the center of the protective sleeve and is rotatably connected to the protective sleeve; characterized in that: The protective cover comprises a sealing fiber layer, a refractory fiber layer and a refractory casting layer from top to bottom, the thickness of the sealing fiber layer is 80-90 mm, and the thickness of the refractory casting layer is 75-85 mm.

2. A rotor transmission assembly according to claim 1, characterized in that: The rotor includes a rotating rod and an impeller, wherein the impeller is fixed at the lower end of the rotating rod, an air guide cavity 1 is provided in the rotating rod, and the air guide cavity 1 coincides with the central axis of the rotating rod, an air guide cavity 2 is provided in the impeller, and the air guide cavity 2 is connected with the air guide cavity 1 through an air inlet hole, and an air outlet hole is provided on the impeller, and the air outlet hole is connected with the air guide cavity 2.

3. A rotor transmission assembly according to claim 2, characterized in that: The impeller includes an upper fixed plate and a lower fixed plate, the upper fixed plate and the lower fixed plate are fixedly connected via an air distribution pipe, the upper fixed plate is fixedly connected to the lower end of the rotating rod, the air inlet is located at the center of the upper fixed plate, and the plurality of air outlets are evenly distributed along the circumference of the side wall of the air distribution pipe, each air outlet is equipped with an arc-shaped baffle, and the baffle is fixedly connected to the outer wall of the air distribution pipe.

4. A rotor transmission assembly according to claim 2, characterized in that: The thickness of the impeller is not less than 60 mm.

5. A rotor transmission assembly according to claim 2, characterized in that: The outer diameter of the rotating rod is not less than 80 mm.

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