Impeller dynamic sealing device and intermittent high-efficiency shaping machine

Abstract

The present invention relates to the technical field of shaping machines, and in particular to an impeller dynamic sealing device. In addition, the present invention also relates to an intermittent high-efficiency shaping machine including the above-mentioned impeller dynamic sealing device, the impeller dynamic sealing device includes a radially arranged labyrinth sealing structure, the end face of the impeller relatively close to the negative pressure port is a sealing surface, and the labyrinth sealing structure is arranged between the inner wall on the side where the negative pressure port is located in the inner cavity and the sealing surface of the impeller. The impeller dynamic sealing device and its intermittent high-efficiency shaping machine of the present invention can prevent the material in the inner cavity from flowing out directly through the negative pressure port from between the sealing surface of the impeller and the inner cavity by arranging a radially arranged labyrinth sealing structure between the sealing surface of the impeller and the inner wall of the inner cavity, thereby keeping the material in the inner cavity so that it can be effectively shaped or fused, thereby greatly improving the material utilization rate and shaping rate.

Description

Technical Field

[0001] The present invention relates to the technical field of shaping machines, in particular to an impeller dynamic sealing device. In addition, the present invention also relates to an intermittent high-efficiency shaping machine including the impeller dynamic sealing device. Background Art

[0002] Shaping machines are widely used in the new energy industry, positive and negative electrode materials, food, additives, coatings, special carbon, magnetic materials and other industries. They have the functions of improving the particle size distribution range of materials, increasing the tap density of material particles, improving the morphology of material particles to make them spherical, and improving the uniformity of material particle size.

[0003] The existing shaping machine mainly includes a cylinder, a shaping disk and an impeller located at the negative pressure port of the cylinder. The impeller and the shaping disk are both located in the inner cavity of the cylinder and are driven by a motor to achieve high-speed rotation. The working principle is as follows: the high-speed rotating shaping disk drives the material particles in the inner cavity to continuously produce collision, impact, friction and shear, etc. The sharp edges and corners on the material particles will gradually break or be smoothed, and the small material particles will also fill and fuse into the gaps of the large material particles, making them tend to be spherical, and after the small material particles and the large material particles are fused, with the continued impact, the spherical material particles are gradually dense, thereby achieving the purpose of shaping;

[0004] At the same time, the high-speed rotating impeller will generate a certain centrifugal force in the inner cavity. The large or heavy finished materials that have been shaped will be subjected to a large centrifugal force and will be thrown to the outside of the diverter ring and will no longer be affected by the centrifugal force to wait for discharge; the small or light materials will be subjected to a small centrifugal force and will be suspended in the middle of the impeller under the action of the negative pressure source connected to the negative pressure port and reach the next station from the negative pressure port; the rest of the materials will continue to be shaped in the inner cavity;

[0005] However, existing shaping machines generally do not pay attention to the sealing between the impeller and the cylinder, and usually leave a large space between the cylinder and the impeller, causing part of the material in the inner cavity to be directly sucked out by the negative pressure source from the space between the impeller and the inner wall of the inner cavity without shaping or fusion, resulting in low material utilization and low shaping rate. Summary of the invention

[0006] The technical problem to be solved by the present invention is: in order to solve the problem that a large space is left between the impeller and the cylinder of the shaping machine in the prior art, and there are no sealing measures, so that part of the material in the inner cavity is directly sucked out by the negative pressure source from the space between the impeller and the inner wall of the inner cavity without being shaped or fused, thereby resulting in low material utilization and low shaping rate, an impeller dynamic sealing device is now provided. Another object of the present invention is to provide an intermittent high-efficiency shaping machine including the above-mentioned impeller dynamic sealing device, which is particularly suitable for the shaping of natural graphite and artificial graphite particles.

[0007] The technical solution adopted by the present invention to solve its technical problems is: an impeller dynamic sealing device, used for a shaping machine, the shaping machine has a cylinder and an impeller, the inner cavity of the cylinder is provided with a negative pressure port, the impeller is arranged in the inner cavity of the cylinder and opposite to the negative pressure port, the impeller dynamic sealing device includes a labyrinth sealing structure arranged along the radial direction, the end face of the impeller relatively close to the negative pressure port is a sealing surface, and the labyrinth sealing structure is arranged between the inner wall on the side of the negative pressure port in the inner cavity and the sealing surface of the impeller.

[0008] In this solution, a radially arranged labyrinth sealing structure is arranged between the sealing surface of the impeller and the inner wall of the inner cavity, which can prevent the material in the inner cavity from flowing out directly through the negative pressure port from between the sealing surface of the impeller and the inner cavity, thereby keeping the material in the inner cavity so that it can be effectively shaped or fused, thereby greatly improving the material utilization rate and shaping rate.

[0009] If the gap between the impeller sealing surface and the inner wall of the inner cavity is too small, it will easily cause a certain resistance to the rotation of the impeller; if the gap between the impeller sealing surface and the inner wall of the inner cavity is too large, it will cause the material to be easily stuck between the impeller sealing surface and the inner wall of the inner cavity, and the sealing effect is not good; then how to improve the sealing performance and prevent the material from being stuck between the impeller and the inner wall of the inner cavity without hindering the free rotation of the impeller, in fact, this is also another key point and difficulty that the present invention needs to consider. In view of this, the present invention cleverly overcomes the above problems through the following technical solutions, as follows:

[0010] Furthermore, the labyrinth sealing structure includes an air flow channel for connecting the outside world and the labyrinth sealing structure; since the inner cavity is in a negative pressure state during operation, the air flow channel will inhale air flow from the outside world, and then utilize the air flow inhaled in the air flow channel to enter the labyrinth sealing structure to form an airtight seal, thereby improving the sealing performance without hindering the free rotation of the impeller.

[0011] Furthermore, the connection position between the airflow channel and the labyrinth sealing structure is arranged so that the resistance of the airflow from the airflow channel to the outermost side of the labyrinth sealing structure is less than the resistance of the airflow from the airflow channel to the innermost side of the labyrinth sealing structure; thereby, the airflow in the airflow channel can flow toward the outside of the labyrinth sealing structure, thereby preventing materials from entering the labyrinth sealing structure, thereby improving the sealing effect.

[0012] Specifically, the radial distance h between the outermost side of the labyrinth sealing structure and the air flow channel is less than the radial distance H between the innermost side of the labyrinth sealing structure and the air flow channel.

[0013] Furthermore, the labyrinth sealing structure includes a sealing plate and a plurality of annular grooves provided on the sealing surface of the impeller, wherein the plurality of annular grooves are spaced apart from the inside to the outside on the sealing surface of the impeller, and the sealing plate is provided with an annular protrusion matching the annular groove, wherein the annular protrusion corresponds to the annular groove one by one, and the sealing plate is fixed on the side of the cylinder where the negative pressure port is located, and the annular protrusion is embedded in the annular groove corresponding thereto, and a gap is left between the annular protrusion and the corresponding annular groove, and between the sealing plate and the sealing surface of the impeller.

[0014] Furthermore, the air flow channel is opened on the sealing plate, a sealing cover is provided above the cylinder, the negative pressure port is located on the sealing cover, the sealing plate is fixed on the sealing cover, and the sealing cover is provided with interconnected connecting grooves and connecting holes, the air flow channel is connected to the connecting grooves, and the connecting holes are connected to the outside.

[0015] The present invention also provides an intermittent high-efficiency shaping machine, comprising a base, a cylinder and an impeller, wherein the cylinder is fixed on the base, the impeller is rotatably installed in the inner cavity of the cylinder and is opposite to the negative pressure port, and also includes the above-mentioned impeller dynamic sealing device.

[0016] Furthermore, a rectifying disk is rotatably installed at the bottom end of the inner cavity, the impeller is located at the top of the inner cavity, the impeller is located in the diverter ring in the inner cavity, a discharge port is opened on the side wall of the cylinder, and a discharge valve is configured at the discharge port; through the setting of the discharge valve, the discharge port can be automatically opened or blocked.

[0017] Furthermore, the discharge valve includes a valve body and a cylinder fixed on the valve body, the valve body is fixed on the outer wall of the cylinder, and a discharge plug matching the discharge port is fixed to the protruding end of the cylinder, the discharge plug is sealed at the discharge port, and the outer circumferential surface of the discharge plug is a conical surface; the discharge plug is pulled or pushed by the cylinder so that the discharge plug opens or blocks the discharge port; wherein, the discharge plug with a conical outer circumferential surface cooperates with the discharge port to achieve circumferential surface sealing, and the discharge plug becomes tighter as it is plugged, thereby effectively improving the sealing performance of the discharge plug to the discharge port, and avoiding easy material leakage at the discharge port.

[0018] The beneficial effects of the present invention are as follows: the impeller dynamic sealing device and the intermittent high-efficiency shaping machine of the present invention can prevent the material in the inner cavity from flowing out directly through the negative pressure port from between the sealing surface of the impeller and the inner cavity by arranging a radially arranged labyrinth sealing structure between the sealing surface of the impeller and the inner wall of the inner cavity, thereby keeping the material in the inner cavity so that it can be effectively shaped or fused, thereby greatly improving the material utilization rate and shaping rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a front view schematic diagram of the impeller dynamic seal device of the present invention used in an intermittent high-efficiency shaping machine;

[0021] Figure 2 yes Figure 1 A is a partial enlarged schematic diagram;

[0022] Figure 3 It is a side view schematic diagram of the impeller dynamic seal device of the present invention used in an intermittent high-efficiency shaping machine;

[0023] Figure 4 It is a schematic diagram of the cover in the present invention.

[0024] In the figure: 1, cylinder, 1-1, inner cavity, 1-2, discharge port, 2, impeller, 2-1, sealing surface, 2-2, annular groove, 3, negative pressure port, 4, air flow channel, 5, sealing plate, 5-1, annular protrusion, 6, cover, 6-1, connecting groove, 6-2, connecting hole, 7, base, 8, rectifier disc, 9, diverter ring, 10, valve body, 11, cylinder, 12, discharge plug;

[0025] h: radial distance between the outermost side of the labyrinth seal structure and the air flow channel;

[0026] H: The radial distance between the innermost side of the labyrinth seal structure and the air flow channel. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0028] Example 1

[0029] like Figure 1-4 As shown, an impeller dynamic sealing device is used for a shaping machine, the shaping machine comprises a cylinder 1 and an impeller 2, a negative pressure port 3 is provided on the inner cavity 1-1 of the cylinder 1, the impeller 2 is arranged in the inner cavity 1-1 of the cylinder 1, and is opposite to the negative pressure port 3, the impeller dynamic sealing device comprises a labyrinth sealing structure arranged along the radial direction, an end face of the impeller 2 relatively close to the negative pressure port 3 is a sealing surface 2-1, and the labyrinth sealing structure is arranged between the inner wall of the inner cavity 1-1 on the side where the negative pressure port 3 is located and the sealing surface 2-1 of the impeller 2.

[0030] The labyrinth sealing structure includes an air flow channel 4 for connecting the outside world and the labyrinth sealing structure; since the inner cavity 1-1 is in a negative pressure state during operation, the air flow channel 4 will inhale air flow from the outside world, and then utilize the air flow inhaled in the air flow channel 4 to enter the labyrinth sealing structure to form an airtight seal, thereby improving the sealing performance without hindering the free rotation of the impeller 2.

[0031] The connection position between the airflow channel 4 and the labyrinth sealing structure is arranged so that the resistance of the airflow from the airflow channel 4 to the outermost side of the labyrinth sealing structure is less than the resistance of the airflow from the airflow channel 4 to the innermost side of the labyrinth sealing structure; since the airflow can easily pass through the side with less resistance caused by the labyrinth sealing structure, the airflow in the airflow channel 4 can flow toward the outside of the labyrinth sealing structure, thereby preventing materials from entering the labyrinth sealing structure, thereby improving the sealing effect.

[0032] The radial distance h between the outermost side of the labyrinth seal structure and the air flow channel 4 is less than the radial distance H between the innermost side of the labyrinth seal structure and the air flow channel 4 .

[0033] The labyrinth seal structure includes a sealing plate 5 and a plurality of annular grooves 2-2 provided on the sealing surface 2-1 of the impeller 2, wherein the plurality of annular grooves 2-2 are sequentially spaced and distributed on the sealing surface 2-1 of the impeller 2 from the inside to the outside, and an annular protrusion 5-1 matching the annular groove 2-2 is provided on the sealing plate 5, and the annular protrusion 5-1 corresponds to the annular groove 2-2 one by one, and the sealing plate 5 is fixed on the cylinder 1 on the side where the negative pressure port 3 is located, and the annular protrusion 5-1 is embedded in the annular groove 2-2 corresponding thereto, and a gap is left between the annular protrusion 5-1 and the annular groove 2-2 corresponding thereto, and between the sealing plate 5 and the sealing surface 2-1 of the impeller 2;

[0034] It is worth noting that the annular groove 2-2 and the annular protrusion 5-1 are opposite to each other, that is, the annular groove 2-2 can also be opened on the sealing plate 5, and the annular protrusion 5-1 can be correspondingly arranged on the sealing surface 2-1 of the impeller 2; in addition, in the present embodiment, three annular grooves 2-2 and three annular protrusions 5-1 can be arranged, specifically, the air flow channel 4 is located between the outermost annular protrusion 5-1 and the middle annular protrusion 5-1.

[0035] The airflow channel 4 is opened on the sealing plate 5, and a sealing cover 6 is provided above the cylinder 1. The negative pressure port 3 is located on the sealing cover 6. The sealing plate 5 is fixed on the sealing cover 6. The sealing cover 6 is provided with a connecting groove 6-1 and a connecting hole 6-2 which are interconnected. The airflow channel 4 is connected to the connecting groove 6-1, and the connecting hole 6-2 is connected to the outside. That is to say, the sealing plate 5 and the sealing cover 6 are split structures and can be processed separately. In addition, in this embodiment, the sealing plate 5 and the sealing cover 6 can also be designed to be integrally formed.

[0036] This embodiment also provides an intermittent high-efficiency shaping machine, including a base 7, a cylinder 1 and an impeller 2, wherein the cylinder 1 is fixed on the base 7, and the impeller 2 is rotatably installed in the inner cavity 1-1 of the cylinder 1 and is opposite to the negative pressure port 3, and also includes the above-mentioned impeller dynamic sealing device.

[0037] A rectifying disk 8 is rotatably mounted at the bottom end of the inner cavity 1-1, the impeller 2 is located at the top end of the inner cavity 1-1, and the impeller 2 is located in a diverter ring 9 in the inner cavity 1-1. A discharge port 1-2 is opened on the side wall of the cylinder 1, and a discharge valve is arranged at the discharge port 1-2; by setting the discharge valve, the discharge port 1-2 can be automatically opened or blocked.

[0038] The discharge valve includes a valve body 10 and a cylinder 11 fixed on the valve body 10, the valve body 10 is fixed on the outer wall of the cylinder 1, and a discharge plug 12 matching the discharge port 1-2 is fixed to the protruding end of the cylinder 11, the discharge plug 12 is sealed at the discharge port 1-2, and the outer peripheral surface of the discharge plug 12 is a conical surface; the discharge plug 12 is pulled or pushed by the cylinder 11 so that the discharge plug 12 opens or blocks the discharge port 1-2; wherein, the discharge plug 12 with a conical outer peripheral surface cooperates with the discharge port 1-2 to achieve circumferential sealing, and the discharge plug 12 is more and more tightly plugged, thereby effectively improving the sealing performance of the discharge plug 12 to the discharge port 1-2, and avoiding easy material leakage at the discharge port 1-2.

[0039] The working principle of this embodiment is as follows:

[0040] The negative pressure port 3 can be specifically connected to a bag filter that generates negative pressure;

[0041] During operation, the motor drives the rectifier disc 8 and the impeller 2 to rotate at a high speed, and the material particles in the inner cavity 1-1 continuously collide, impact, rub and shear, etc. The sharp edges and corners on the material particles will gradually break or be smoothed, and the small material particles will also fill and fuse into the gaps of the large material particles, making them tend to be spherical, and after the small material particles merge with the large material particles, with the continued impact, the spherical material particles will gradually become dense, thereby achieving the purpose of shaping;

[0042] At the same time, the high-speed rotating impeller 2 will generate a certain centrifugal force in the inner cavity 1-1. The large or heavy finished materials that have been shaped will be subjected to a large centrifugal force and will be thrown to the outside of the diversion 9 and will no longer be affected by the centrifugal force to be discharged. The small or light materials will be subjected to a small centrifugal force and will be suspended in the middle part of the impeller 2 under the action of the bag dust collector connected to the negative pressure port 3 and reach the bag dust collector from the negative pressure port 3. The remaining materials will continue to be shaped in the inner cavity 1-1.

[0043] After the material is shaped, the discharge valve is opened to remove the discharge plug 12 from the discharge port 1-2, and the shaped finished material located outside the diverter ring 9 in the inner cavity 1-1 can be collected and taken out from the discharge port 1-2.

[0044] Among them, the fine or light material particles in the inner cavity 1-1 can basically only enter the negative pressure port 3 from the gap in the impeller 2 itself (the gap formed between two adjacent blades in the impeller 2);

[0045] At the same time, since the inner cavity 1-1 is in a negative pressure state during operation, the airflow channel 4 will inhale air from the outside and enter the labyrinth sealing structure, and the airflow can easily pass through the side of the labyrinth sealing structure where the resistance to it is smaller. Therefore, the airflow in the airflow channel 4 can flow toward the outside of the labyrinth sealing structure, thereby preventing the material from entering the labyrinth sealing structure, thereby improving the sealing effect and greatly improving the material utilization rate and shaping rate.

[0046] The above-mentioned ideal embodiments of the present invention are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An impeller dynamic sealing device for a shaping machine, the shaping machine comprising a cylinder (1) and an impeller (2), the inner cavity (1-1) of the cylinder (1) being provided with a negative pressure port (3), the impeller (2) being arranged in the inner cavity (1-1) of the cylinder (1) and being opposite to the negative pressure port (3), characterized in that: The impeller dynamic sealing device comprises a labyrinth sealing structure arranged in a radial direction, wherein an end surface of the impeller (2) relatively close to the negative pressure port (3) is a sealing surface (2-1), and the labyrinth sealing structure is arranged between an inner wall of the inner cavity (1-1) located on the side where the negative pressure port (3) is located and the sealing surface (2-1) of the impeller (2); The labyrinth sealing structure comprises an air flow channel (4) for connecting the outside world and the labyrinth sealing structure; The connection position between the airflow channel (4) and the labyrinth sealing structure is arranged so that the resistance of the airflow from the airflow channel (4) to the outermost side of the labyrinth sealing structure is less than the resistance of the airflow from the airflow channel (4) to the innermost side of the labyrinth sealing structure; so that the airflow in the airflow channel (4) can flow toward the outer side of the labyrinth sealing structure, thereby preventing materials from entering the labyrinth sealing structure; The radial distance h between the outermost side of the labyrinth sealing structure and the airflow channel (4) is less than the radial distance H between the innermost side of the labyrinth sealing structure and the airflow channel (4); The labyrinth seal structure comprises a sealing plate (5) and a plurality of annular grooves (2-2) formed on a sealing surface (2-1) of an impeller (2). The plurality of annular grooves (2-2) are sequentially spaced from the inside to the outside on the sealing surface (2-1) of the impeller (2). The sealing plate (5) is provided with an annular protrusion (5-1) matching the annular groove (2-2). The annular protrusion (5-1) corresponds to the annular groove (2-2) one by one. The sealing plate (5) is fixed on the cylinder (1) at the side where the negative pressure port (3) is located. The annular protrusion (5-1) is embedded in the annular groove (2-2) corresponding thereto. A gap is left between the annular protrusion (5-1) and the annular groove (2-2) corresponding thereto, and between the sealing plate (5) and the sealing surface (2-1) of the impeller (2). The air flow channel (4) is formed on the sealing plate (5), a sealing cover (6) is provided above the cylinder (1), the negative pressure port (3) is located on the sealing cover (6), the sealing plate (5) is fixed on the sealing cover (6), and the sealing cover (6) is provided with a connecting groove (6-1) and a connecting hole (6-2) which are connected to each other, the air flow channel (4) is connected to the connecting groove (6-1), and the connecting hole (6-2) is connected to the outside.

2. An intermittent high-efficiency shaping machine, comprising a base (7), a cylinder (1) and an impeller (2), wherein the cylinder (1) is fixed on the base (7), and the impeller (2) is rotatably mounted in the inner cavity (1-1) of the cylinder (1) and is opposite to the negative pressure port (3), characterized in that: It also includes the impeller dynamic seal device as claimed in claim 1.

3. The intermittent high-efficiency shaping machine according to claim 2 is characterized in that: A rectifying disc (8) is rotatably mounted at the bottom end of the inner cavity (1-1), the impeller (2) is located at the top end of the inner cavity (1-1), the impeller (2) is located in a flow divider ring (9) in the inner cavity (1-1), a discharge port (1-2) is provided on the side wall of the cylinder (1), and a discharge valve is arranged at the discharge port (1-2).

4. The intermittent high-efficiency shaping machine according to claim 3 is characterized in that: The discharge valve comprises a valve body (10) and a cylinder (11) fixed to the valve body (10); the valve body (10) is fixed to the outer wall of the cylinder (1); a discharge plug (12) matching the discharge port (1-2) is fixed to the protruding end of the cylinder (11); the discharge plug (12) is sealed at the discharge port (1-2), and the outer peripheral surface of the discharge plug (12) is a conical surface.

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