Double-shaft type mechanical mill
Through the dual-axis mechanical grinding design, the graded wheel and grinding disc are driven respectively, and the environment is isolated by a protective sleeve and insulation layer, the problem of existing mechanical grinding being difficult to operate for a long time in high or low temperature environments is solved, and the crushing efficiency and durability of the equipment are improved.
Patent Information
- Application Number
- CN202422038214.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-08-22
AI Technical Summary
The existing mechanical grinding is difficult to operate for a long time in high or low temperature environments, the transmission shaft and bearings are prone to damage, and the single-axis drive efficiency is low, making it difficult to meet the needs of efficient production.
The biaxial mechanical grinding design is adopted, and the grading wheel and the grinding disc are driven by the first and second drives respectively, and are isolated from high-temperature or low-temperature environments through protective sleeves, protective shells and thermal insulation layers.
It effectively improves the efficiency of material crushing, ensures that the mechanical grinding can operate for a long time in high or low temperature environments, and avoids damage to the transmission shaft and bearings.
Smart Images
Figure CN222998891U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mechanical grinding equipment, and particularly relates to a double-shaft mechanical grinder. Background Art
[0002] In industrial production, mechanical grinders are often used for grinding and processing various materials. When processing some materials, it is necessary to maintain them within a certain temperature range. This results in the mechanical grinder needing to operate in a high-temperature or low-temperature environment for a long time. However, for existing mechanical grinders when facing high-temperature or low-temperature operating environments, since most of their components are exposed to the operating environment for a long time, performance degradation, component damage, or even inability to work properly often occur, especially in the parts of the transmission shaft and bearings. For example, in a high-temperature environment, the transmission shaft is prone to deformation and lubrication failure due to overheating; in a low-temperature environment, the transmission shaft may become brittle, and the flexibility of mechanical transmission components decreases, thus affecting the processing accuracy and efficiency. Limited by its structure, the existing mechanical grinder is difficult to protect its shaft part, so it cannot operate for a long time in high-temperature or low-temperature environments.
[0003] Moreover, for mechanical grinders in the prior art, usually a single-shaft drive method is adopted to drive the grinding disc to rotate, and only relying on the centrifugal force generated by the high-speed rotation of the grinding disc to drive the materials to collide, the efficiency is low, and it is difficult to meet the high-efficiency production requirements. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a double-shaft mechanical grinder with high efficiency and capable of solving the problem that the shaft body of the existing mechanical grinder lacks protection in high-temperature or low-temperature environments.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a double-shaft mechanical grinder, including a grinding chamber and a classification wheel and a grinding disc arranged in the grinding chamber, the classification wheel and the grinding disc are arranged opposite to each other, and the classification wheel and the grinding disc are respectively driven by a first drive and a second drive;
[0006] The first drive includes a classification shaft connected to the classification wheel, the classification shaft is arranged in the discharge chamber, and a protective sleeve sleeved on the outer periphery of the classification shaft is arranged in the discharge chamber;
[0007] The second drive includes a connecting shaft member connected to the grinding disc, the connecting shaft member is arranged in the feeding chamber, and a protective shell sleeved on the outer periphery of the connecting shaft member is arranged in the feeding chamber, and a heat preservation layer is embedded in the gap between the protective shell and the connecting shaft member;
[0008] The feeding chamber, the grinding chamber, and the discharge chamber are communicated with each other in sequence from bottom to top in the vertical direction, and a feeding port and an air inlet are arranged on the side wall of the feeding chamber.
[0009] Optionally, a first housing is sleeved on the outer periphery of the grading wheel and the grinding disc, a first shaft cover capable of sealing the opening at the bottom end of the first housing is sleeved on the outer periphery of the connecting shaft member, and a second shaft cover capable of sealing the opening at the top end of the first housing is disposed around the outer periphery of the grading shaft. A second housing capable of surrounding the outer periphery of the connecting shaft member is provided on the first shaft cover, and a third housing capable of surrounding the outer periphery of the grading shaft is provided on the second shaft cover;
[0010] A grinding cavity is formed by surrounding between the first housing, the first shaft cover and the second shaft cover. A feeding cavity is formed by surrounding between the second housing and the first shaft cover. A discharging cavity is formed by surrounding between the third housing and the second shaft cover. A through hole capable of communicating the feeding cavity with the grinding cavity is provided on the first shaft cover, and the first housing, the first shaft cover, the second shaft cover, the second housing and the third housing are connected by flanges.
[0011] Optionally, the connecting shaft member includes a positioning shaft sleeve disposed in the feeding cavity. An output shaft connected to the grinding disc is disposed in the positioning shaft sleeve through a bearing. A sealing shaft sleeve is provided between the output shaft and the first shaft cover. The protective housing surrounds the outer peripheries of the sealing shaft sleeve and the positioning shaft sleeve.
[0012] Optionally, the central axes of the grading wheel, the grinding disc and the grinding cavity coincide. The through holes are circumferentially distributed along the central axis of the grinding cavity, and the through holes can surround the outer periphery of the grinding disc.
[0013] Optionally, the air inlet is tangent to the feeding cavity.
[0014] Optionally, a crushing tooth ring is provided on the inner wall of the grinding cavity.
[0015] Optionally, a plurality of hammers are provided on the grinding disc.
[0016] Optionally, the first drive further includes a first motor and a first belt pulley disposed at the end of the grading shaft. The second drive further includes a second motor and a second belt pulley disposed at the end of the output shaft. The first motor and the first belt pulley, and the second motor and the second belt pulley are driven by belts.
[0017] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: Through the split structure design, the grinding disc and the grading wheel are separately driven by the first drive and the second drive, which can effectively improve the efficiency of material crushing. At the same time, through the protective housing and the heat insulation layer on the connecting shaft member and the protective sleeve on the grading shaft, the influence brought by high temperature and low temperature can be effectively isolated, and it can meet the long-term operation of the mechanical mill in high temperature or low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0019] Figure 1 is a front view structural schematic diagram of a double - shaft mechanical mill in a preferred embodiment of the present utility model;
[0020] Figure 2 is a side view structural schematic diagram of a double - shaft mechanical mill in a preferred embodiment of the present utility model;
[0021] Figure 3 is in a preferred embodiment of the present utility model Figure 2 is a sectional view structural schematic diagram at A - A;
[0022] Among them, 101, grinding chamber; 102, discharge chamber; 103, feed chamber; 1031, feed inlet; 1032, air inlet; 1, classification wheel; 2, grinding disc; 3, classification shaft; 301, protective sleeve; 401, positioning shaft sleeve; 402, bearing; 403, output shaft; 404, sealing shaft sleeve; 5, protective shell; 6, heat - insulating layer; 7, first housing; 8, first shaft cover; 9, second shaft cover; 10, second housing; 11, third housing; 12, crushing gear ring; 13, hammer head; 14, first motor; 15, first belt pulley; 16, second motor; 17, second belt pulley. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] The present utility model will be further described in detail below in conjunction with the drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic way, so they only show the components related to the present utility model.
[0024] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, then the directional indications will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0025] Such asFigures 1 - 3 As shown in the figure, a double-shaft mechanical mill includes a grinding chamber 101, a classification wheel 1 and a grinding disc 2 disposed in the grinding chamber 101. The classification wheel 1 and the grinding disc 2 are oppositely arranged, and the classification wheel 1 and the grinding disc 2 are respectively driven by a first drive and a second drive; the first drive includes a classification shaft 3 connected to the classification wheel 1. The classification shaft 3 is disposed in the discharge chamber 102, and a protective sleeve 301 sleeved on the outer periphery of the classification shaft 3 is disposed in the discharge chamber 102; the second drive includes a connecting shaft member connected to the grinding disc 2. The connecting shaft member is disposed in the feed chamber 103, and a protective shell 5 sleeved on the outer periphery of the connecting shaft member is disposed in the feed chamber 103. A heat-insulating layer 6 is embedded in the gap between the protective shell 5 and the connecting shaft member; the feed chamber 103, the grinding chamber 101, and the discharge chamber 102 are communicated in sequence from bottom to top in the vertical direction, and a feed port 1031 and an air inlet 1032 are provided on the side wall of the feed chamber 103.
[0026] Specifically, the material enters the feed chamber 103 through the feed port 1031, and positive pressure gas is introduced into the feed chamber 103 through the air inlet 1032. According to the characteristics of the material, positive pressure gas at high temperature or low temperature can be selected to meet the requirements. After the positive pressure gas and the material are preliminarily mixed in the feed chamber 103 to form a solid-gas mixture, when the solid-gas mixture enters the grinding chamber 101, since the classification wheel 1 rotates at a high speed driven by the first drive and the grinding disc 2 rotates at a high speed driven by the second drive, under the interaction of the classification wheel 1 and the grinding disc 2, the larger-particle-size materials can collide repeatedly with each other, with the classification wheel 1 and the grinding disc 2, so as to be broken into smaller-particle-size particles. And the smaller-particle-size particles will enter the discharge chamber 102 under the action of the positive pressure gas, completing the pulverization of the material. Based on the above structure, in the double-shaft heat-insulating and heat-preserving mechanical mill of the present technical solution, the shaft bodies, namely the classification shaft 3 and the connecting shaft member, can effectively isolate the influence brought by high temperature and low temperature through the protective shell 5 on the connecting shaft member, the heat-insulating layer 6 and the protective sleeve 301 on the classification shaft 3, and can meet the requirement of the mechanical mill for long-time operation in high-temperature or low-temperature environments.
[0027] In the double-shaft heat-insulating and heat-preserving mechanical mill of the present technical solution, different from the single-shaft drive in the prior art, the classification wheel 1 and the grinding disc 2 are respectively driven by separate mechanisms, so that when the classification wheel 1 and the grinding disc 2 rotate, the residence time of the material in the grinding chamber 101 can be increased by respectively adjusting the rotation speeds of the classification wheel 1 and the grinding disc 2, thereby increasing the number of collisions between the material and the classification wheel 1 and the grinding disc 2, improving the pulverization efficiency while also improving the quality of the pulverized material.
[0028] As mentioned above, the protective sleeve 301 and the heat-insulating layer 6 are composed of one or more of materials such as a high-temperature-resistant heat-insulating and heat-preserving coating, an inorganic refractory material, rock wool, alumina ceramic fiber, graphite, and ceramic fiber, and have good heat-insulating and heat-preserving effects.
[0029] Further, for the convenience of daily maintenance and repair of the biaxial heat-insulating and heat-preserving mechanical mill in the present technical solution, as Figure 3 shown, a first housing 7 is sleeved on the outer periphery of the classification wheel 1 and the grinding disc 2, a first shaft cover 8 capable of sealing the bottom opening of the first housing 7 is sleeved on the outer periphery of the connecting shaft member, a second shaft cover 9 capable of sealing the top opening of the first housing 7 is disposed around the outer periphery of the classification shaft 3, a second housing 10 capable of surrounding the outer periphery of the connecting shaft member is disposed on the first shaft cover 8, and a third housing 11 capable of surrounding the outer periphery of the classification shaft 3 is disposed on the second shaft cover 9; a grinding cavity 101 is formed by surrounding between the first housing 7, the first shaft cover 8, and the second shaft cover 9, a feed cavity 103 is formed by surrounding between the second housing 10 and the first shaft cover 8, a discharge cavity 102 is formed by surrounding between the third housing 11 and the second shaft cover 9, a through hole capable of communicating the feed cavity 103 and the grinding cavity 101 is disposed on the first shaft cover 8, and the first housing 7, the first shaft cover 8, the second shaft cover 9, the second housing 10, and the third housing 11 are connected by flanges.
[0030] As described above, a gas sealing structure can be provided between the third housing 11 and the classification shaft 3 to prevent materials from entering the gap between the classification shaft 3 and the third housing 11, causing unnecessary waste.
[0031] As described above, the central axes of the classification wheel 1 and the grinding disc 2 coincide with the central axis of the grinding cavity 101, the through holes are circumferentially distributed along the central axis of the grinding cavity 101, and the through holes can surround the outer periphery of the grinding disc 2. Under the action of positive pressure gas, materials can enter the grinding cavity 101 through a plurality of through holes. To prevent materials from directly entering the discharge cavity 102 through the classification wheel 1, a plurality of groups of inverted "V"-shaped channels communicating the feed cavity 103 and the grinding cavity 101 can be formed by surrounding between the classification wheel 1, the grinding disc 2, and the first shaft cover 8 and the second shaft cover 9, as Figure 3 shown. The path indicated by the black arrow is the flow path of the solid-gas mixture in the grinding cavity 101. Further, the gas pressure directly above the grinding disc 2 decreases and is not sufficient to support larger-particle-size materials to enter the discharge cavity 102 through the second shaft cover 9. Driven by the grinding disc 2, the larger-particle-size materials can collide with the inner wall of the first housing 7, the classification wheel 1, the grinding disc 2, etc. again until they are crushed into smaller-particle-size particles.
[0032] Further, to increase the efficiency of material collision and crushing, as Figure 3 shown, a crushing tooth ring 12 is disposed on the inner wall of the grinding cavity 101, and a plurality of hammers 13 are disposed on the grinding disc 2.
[0033] At the same time, to increase the efficiency of materials passing through the feed cavity 103, the air inlet 1032 is tangent to the feed cavity 103, that is, the air inlet 1032 has tangential air intake, which can make the materials rotate and rise in the feed cavity 103 and quickly enter the grinding cavity 101 through the through holes.
[0034] In this embodiment, the connecting shaft member includes a positioning bushing 401 disposed in the feeding chamber 103. An output shaft 403 connected to the grinding disc 2 is disposed in the positioning bushing 401 through a bearing 402. A sealing bushing 404 is disposed between the output shaft 403 and the first shaft cover 8. The protective shell 5 is disposed around the outer periphery of the sealing bushing 404 and the positioning bushing 401. An airtight structure can be disposed between the sealing bushing 404 and between the output shaft 403 and the positioning bushing 401 for protecting the output shaft 403 and the bearing 402.
[0035] The first drive further includes a first motor 14 and a first pulley 15 disposed at the end of the classification shaft 3. The second drive further includes a second motor 16 and a second pulley 17 disposed at the end of the output shaft 403. A belt drive is provided between the first motor 14 and the first pulley 15 and between the second motor 16 and the second pulley 17.
[0036] Working principle: Materials enter the feeding chamber 103 through the feeding port 1031. The air inlet 1032 blows air tangentially, introducing positive-pressure gas at high or low temperature into the feeding chamber 103. The positive-pressure gas and the materials are preliminarily mixed in the feeding chamber 103 to form a solid-gas mixture. The solid-gas mixture rotates upward and enters the grinding chamber 101. The first motor 14 drives the classification wheel 1 to rotate at a high speed, and the second motor 16 drives the grinding disc 2 to rotate at a high speed. Under the interaction between the classification wheel 1 and the grinding disc 2, the materials with larger particle sizes can repeatedly collide with each other, and between the materials and the classification wheel 1 and the grinding disc 2, so as to be broken into smaller particles. The particles with smaller particle sizes will enter the discharge chamber 102 and be discharged under the action of the positive-pressure gas, completing the crushing of the materials. In this process, through the protective shell 5 on the connecting shaft member, the heat-insulating layer 6 and the protective sleeve 301 on the classification shaft 3, the influence brought by high or low temperature can be effectively isolated, and it can meet the requirement of the mechanical mill for operating for a long time in a high or low temperature environment.
[0037] Based on the ideal embodiments of the present invention as inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.
Claims
1. A double-shaft mechanical mill, characterized in that: It comprises a grinding chamber (101) and a classifying wheel (1) and a grinding disc (2) arranged in the grinding chamber (101), wherein the classifying wheel (1) and the grinding disc (2) are arranged opposite to each other, and the classifying wheel (1) and the grinding disc (2) are driven by a first drive and a second drive respectively; The first drive comprises a grading shaft (3) connected to the grading wheel (1), the grading shaft (3) being arranged in a discharge cavity (102), and a protective sleeve (301) sleeved on the outer periphery of the grading shaft (3) being arranged in the discharge cavity (102); The second drive comprises a connecting shaft connected to the grinding disc (2), the connecting shaft being arranged in a feed cavity (103), and a protective shell (5) sleeved on the outer periphery of the connecting shaft being arranged in the feed cavity (103), and a thermal insulation layer (6) being embedded in a gap between the protective shell (5) and the connecting shaft; The feed chamber (103), the grinding chamber (101), and the discharge chamber (102) are connected in sequence from bottom to top in a vertical direction, and a feed port (1031) and an air inlet (1032) are provided on a side wall of the feed chamber (103).
2. The dual-shaft mechanical mill according to claim 1, characterized in that: The outer circumference of the classifying wheel (1) and the grinding disc (2) is sleeved with a first shell (7); the outer circumference of the connecting shaft is sleeved with a first shaft cover (8) capable of blocking the bottom opening of the first shell (7); the outer circumference of the classifying shaft (3) is provided with a second shaft cover (9) capable of blocking the top opening of the first shell (7); the first shaft cover (8) is provided with a second shell (10) capable of surrounding the outer circumference of the connecting shaft; and the second shaft cover (9) is provided with a third shell (11) capable of surrounding the outer circumference of the classifying shaft (3); The grinding chamber (101) is formed between the first shell (7), the first shaft cover (8) and the second shaft cover (9); the feeding chamber (103) is formed between the second shell (10) and the first shaft cover (8); the discharging chamber (102) is formed between the third shell (11) and the second shaft cover (9); a through hole capable of connecting the feeding chamber (103) and the grinding chamber (101) is provided on the first shaft cover (8); and the first shell (7), the first shaft cover (8), the second shaft cover (9), the second shell (10) and the third shell (11) are connected by flanges.
3. The dual-shaft mechanical mill according to claim 2, characterized in that: The connecting shaft comprises a positioning sleeve (401) arranged in the feed cavity (103); an output shaft (403) connected to the grinding disc (2) is arranged in the positioning sleeve (401) via a bearing (402); a sealing sleeve (404) is arranged between the output shaft (403) and the first shaft cover (8); and the protective shell (5) is arranged around the outer circumference of the sealing sleeve (404) and the positioning sleeve (401).
4. The dual-shaft mechanical mill according to claim 2, characterized in that: The central axes of the classifying wheel (1) and the grinding disc (2) coincide with the central axis of the grinding chamber (101); the through holes are distributed in a circular pattern along the central axis of the grinding chamber (101); and the through holes can be arranged around the outer circumference of the grinding disc (2).
5. The dual-shaft mechanical mill according to claim 1, characterized in that: The air inlet (1032) is tangent to the feed cavity (103).
6. The dual-shaft mechanical mill according to claim 1, characterized in that: The inner wall of the grinding chamber (101) is provided with a grinding gear ring (12).
7. The dual-shaft mechanical mill according to claim 1, characterized in that: A plurality of hammer heads (13) are arranged on the grinding disc (2).
8. The dual-shaft mechanical mill according to claim 3, characterized in that: The first drive further comprises a first motor (14) and a first pulley (15) arranged at the end of the grading shaft (3); the second drive further comprises a second motor (16) and a second pulley (17) arranged at the end of the output shaft (403); belt transmission is provided between the first motor (14) and the first pulley (15), and between the second motor (16) and the second pulley (17).