Airflow dryer

Abstract

The utility model discloses an airflow dryer which comprises a machine table, a cavity is formed in the machine table, a smashing cutter head and a rotating shaft used for driving the smashing cutter head to rotate are arranged in the cavity, and a plurality of smashing blades are arranged on the upper surface of the smashing cutter head along the circumference of the smashing cutter head. A motor used for driving the rotating shaft to rotate is further arranged on the machine table, the rotating shaft comprises a shaft center and a shaft sleeve arranged outside the shaft center, a plurality of bearing assemblies are further arranged between the shaft center and the shaft sleeve, an oil inlet pipe is arranged at the upper end of the shaft sleeve, and an oil return pipe is arranged at the lower end of the shaft sleeve. And an air inlet is formed in the cavity below the crushing cutter head. The oil inlet pipe and the oil return pipe are arranged at the upper end and the lower end of the rotating shaft correspondingly, cooling of all parts on the rotating shaft is achieved through a continuous oil cooling system, and it is guaranteed that the service life of key parts is not affected while material drying is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pneumatic dryer belongs to material automation drying equipment technical field. BACKGROUND

[0002] When the wet material or the material such as food additive that needs drying treatment is crushed and screened, a crushing and drying all-in-one machine is usually used for operation. For example, in a patent with the application number 202422228950.1 and the patent name of a crushing and drying all-in-one machine, an integrated production method for crushing and drying the material is disclosed, which continuously inputs hot air into the crushing cavity for drying while crushing.

[0003] However, in the above-mentioned device, since the hot air is continuously input into the crushing cavity, the driving bearing in the cavity will also have its temperature rise due to the influence of the hot air. If there is no effective cooling measure, it will greatly affect the service life of the bearing and the surrounding components. In order to cool the bearing assembly, a scheme as described in a patent with the application number 202110179691.6 and the patent name of a flash drying method for fish meal can be used, which cools the bearing by circulating and inputting cooling oil into a lubricating cavity through the bearing.

[0004] However, in the process of cooling by circulating cooling oil, the sealing requirement of the lubricating cavity is very high, especially for the pneumatic dryer used for food processing. Once the cooling oil leaks, it will contaminate all the processed products. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the defects in the prior art and providing a pneumatic dryer. By setting an oil inlet pipe and an oil return pipe at the upper and lower ends of the rotating shaft respectively, the temperature of each component on the rotating shaft is cooled by a continuous oil cooling system, ensuring that the service life of the key components is not affected while the material is dried. At the same time, a ring-shaped oil return cavity is formed by the bending part and the oil return guide sleeve cooperating with each other at the bottom of the shaft, which avoids the leakage of the cooling oil from the shaft center.

[0006] To achieve the above-mentioned purpose, the utility model is implemented by using the following technical scheme:

[0007] A pneumatic dryer comprises a machine table, a cavity is arranged on the machine table, a crushing cutter head and a rotating shaft for driving the crushing cutter head to rotate are arranged in the cavity, a plurality of crushing blades are arranged on the upper surface of the crushing cutter head along the circumference, a motor for driving the rotating shaft to rotate is also arranged on the machine table, the rotating shaft comprises a shaft center and a shaft sleeve arranged outside the shaft center, an oil inlet pipe is arranged at the upper end of the shaft sleeve, and an oil return pipe is arranged at the lower end of the shaft sleeve.

[0008] The cavity below the pulverizing cutter disc is provided with an air inlet;

[0009] The shaft sleeve comprises an upper shaft sleeve and a lower shaft sleeve connected in a sealed manner,

[0010] The bottom of the lower shaft sleeve is provided with a first bending part turned upward and forming a first oil return cavity with an opening upward, and the oil return pipe is arranged at the bottom position of the first oil return cavity of the lower shaft sleeve.

[0011] The lower end of the shaft core is further provided with an oil return guide sleeve, the top of the oil return guide sleeve is provided with a second bending part turned downward and forming a second oil return cavity with an opening downward, the first bending part extends into the second oil return cavity, and the second bending part extends into the first oil return cavity.

[0012] The airflow dryer has the characteristics that the top of the oil return guide sleeve is provided with an inclined guide surface along the circumferential line thereof.

[0013] The airflow dryer has the characteristics that the cavity above the pulverizing cutter disc is provided with a feeding port, and the top of the cavity is provided with a material collecting port.

[0014] The airflow dryer has the characteristics that the top of the shaft core is provided with a conical guide structure.

[0015] The airflow dryer has the characteristics that the upper end of the cavity is provided with a grading wheel assembly, and the material outlet of the grading wheel assembly is communicated with the material collecting port.

[0016] Compared with the prior art, the airflow dryer has the characteristics that the oil inlet pipe and the oil return pipe are arranged at the upper and lower ends of the rotating shaft respectively, the oil cooling system is continuously used to cool the components on the rotating shaft, the service life of the key components is not affected when the material is dried, and the oil leakage structure is arranged at the bottom of the shaft core to prevent the cooling oil from leaking. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a front view of the airflow dryer of the utility model;

[0018] Figure 2 is a top view of the airflow dryer of the utility model;

[0019] Figure 3 is Figure 2 is the A-A sectional view;

[0020] Figure 4 is a front view of the rotating shaft of the airflow dryer of the utility model;

[0021] Figure 5 is Figure 4 is a B-B sectional view of

[0022] Figure 6 is a plan view of a rotating shaft of the airflow dryer of the utility model;

[0023] Figure 7 is Figure 6 is a C-C sectional view of

[0024] Figure 8 is Figure 6 is a D-D sectional view of

[0025] Figure 9 is Figure 8 is an enlarged schematic view of E in DETAILED DESCRIPTION

[0026] The utility model will be further described below in conjunction with the drawings. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0027] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0028] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0029] The utility model provides a kind of airflow dryer, including machine table, the cavity 10 is provided on the machine table, the shaft 11 for driving the comminuting cutterhead 12 rotation is provided in the cavity 10, the upper surface of the comminuting cutterhead 12 is provided with multiple comminuting blades 121 along its periphery, motor 20 for driving the shaft 11 rotation is further provided on the machine table, the shaft 11 includes shaft center 111 and the shaft sleeve being arranged outside the shaft center, multiple bearing assemblies 114 are further provided between the shaft center 111 and the shaft sleeve, the upper end of the shaft sleeve is provided with oil inlet pipe 115, lower end is provided with oil return pipe 116;

[0030] The cavity 10 below the comminuting cutterhead 12 is provided with air inlet 14.

[0031] The cavity 10 above the comminuting cutterhead 12 is provided with feed inlet 13, and the top of the cavity 10 is provided with material collecting port 16. The material to be comminuted and dried is sent into the cavity 10 through the feed inlet 13, and the comminution of the material is realized by the high-speed rotating comminuting cutterhead 12 and comminuting blades 121, and the comminuted material in the cavity 10 is dried by the continuous input of hot air from the air inlet 14.

[0032] During the comminution process, due to the high-speed rotation of the comminuting cutterhead 12 and comminuting blades 121, in cooperation with the hot air flowing from below the comminuting cutterhead 12 and the airflow formed by the material flowing out from the top material collecting port, it is ensured that the material will not fall into the cavity below the comminuting cutterhead 12, and at the same time, the smaller comminuted material will flow out from the material collecting port 16 under the action of the airflow formed by the hot air, and the larger material will continue to be comminuted by the comminuting blades 121 due to its larger gravity.

[0033] In this embodiment, the upper end of the cavity 10 is provided with a grading wheel assembly (not shown in the figure), and the discharge port of the grading wheel assembly is in communication with the material collecting port 16. The comminuted material is sent into the grading wheel assembly under the action of the airflow formed by the hot air, and under the action of the grading wheel assembly, the particles meeting the particle size requirement (smaller particles) are screened out and flow out from the material collecting port 16, and the larger particles will be sent back to the comminuting cutterhead 12 for comminution due to their larger centrifugal force. The top of the shaft center 111 is provided with a conical guide structure 15. The material entering from the feed inlet can be quickly dispersed to the edge of the comminuting cutterhead 12 for comminution under the action of the conical guide structure 15.

[0034] In this embodiment, the feed inlet 13 can be provided with a screw feeding mode for uniform feeding.

[0035] During the process of continuously inputting hot air into the cavity 10, the cooling oil continuously flows into the inside of the rotating shaft from the oil inlet pipe 115 and then flows out from the oil return pipe 116, continuously taking away the heat in the rotating shaft, so that the temperature of each component in the rotating shaft is reduced, and the service life of the components is ensured.

[0036] In the embodiment, the shaft sleeve comprises a sealingly connected upper shaft sleeve 112 and a lower shaft sleeve 113, two bearing assemblies are arranged between the shaft center 111 and the upper shaft sleeve 112, one bearing assembly is arranged between the shaft center 111 and the lower shaft sleeve 113, the oil inlet pipe 115 is arranged at a position between the two bearing assemblies in the upper shaft sleeve 112, and the bottom of the lower shaft sleeve 113 is provided with an upwardly folded first bending part 1131 and forms an upwardly open first oil return cavity, and the oil return pipe 116 is arranged at a bottom position of the first oil return cavity of the lower shaft sleeve 113.

[0037] The cooling oil entering through the oil inlet pipe 115 gradually flows into the first oil return cavity through multiple components such as bearings, and then flows out through the oil return pipe 116, and the first oil return cavity can temporarily store a small amount of cooling oil, so that when the oil inlet amount is greater than the oil return amount, the leakage is avoided.

[0038] Further, the lower end of the shaft center 111 is further provided with an oil return guide sleeve 117, the top of the oil return guide sleeve 117 is provided with a downwardly folded second bending part 1171 and forms a downwardly open second oil return cavity, the first bending part 1131 extends into the second oil return cavity, and the second bending part 1171 extends into the first oil return cavity.

[0039] The oil return guide sleeve 117 can ensure that the cooling oil flowing down from the top enters the first oil return cavity and does not leak from the first bending part 1131 and the shaft center 111 during the flowing down process, and the sealing connection of the oil return guide sleeve 117 and the shaft center 111 further avoids the leakage. The top of the oil return guide sleeve 117 is provided with an inclined guide surface 1172 along the circumference thereof, so that the cooling oil flowing down can smoothly and quickly enter the first oil return cavity.

[0040] In summary, the airflow dryer provided by the utility model realizes the temperature reduction of each component on the rotating shaft through the continuous oil cooling system by arranging the oil inlet pipe and the oil return pipe at the upper and lower ends of the rotating shaft, so that the service life of the key components is not affected while realizing the drying of the materials.

[0041] The above merely is the preferred implementation manner of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and deformations can be made, and these improvements and deformations should also be considered as the protection scope of the present application.

Claims

1. An airflow dryer, comprising a machine platform, a cavity (10) being provided on the machine platform, a crushing blade disc (12) and a rotating shaft (11) for driving the crushing blade disc (12) to rotate being provided in the cavity (10), a plurality of crushing blades (121) being provided on the upper surface of the crushing blade disc (12) along its circumference, and a motor (20) for driving the rotating shaft (11) to rotate being further provided on the machine platform, characterized in that: The rotating shaft (11) comprises a shaft core (111) and a shaft sleeve arranged outside the shaft core, wherein the upper end of the shaft sleeve is provided with an oil inlet pipe (115) and the lower end is provided with an oil return pipe (116); An air inlet (14) is provided on the cavity (10) below the crushing blade disc (12); The shaft sleeve comprises an upper shaft sleeve (112) and a lower shaft sleeve (113) which are sealed together. The bottom of the lower shaft sleeve (113) is provided with a first bent portion (1131) that is folded upward to form a first oil return cavity that opens upward, and the oil return pipe (116) is provided at the bottom of the first oil return cavity of the lower shaft sleeve (113); The lower end of the shaft (111) is further provided with an oil return guide sleeve (117), and the top of the oil return guide sleeve (117) is provided with a second bent portion (1171) that is turned downward to form a second oil return cavity with a downward opening, the first bent portion (1131) extends into the second oil return cavity, and the second bent portion (1171) extends into the first oil return cavity.

2. The air flow dryer according to claim 1, characterized in that: An inclined guide surface (1172) is provided at the top of the oil return guide sleeve (117) along its circumference.

3. The air flow dryer according to claim 1, characterized in that: A feed port (13) is provided on the cavity (10) above the crushing blade disc (12), and a receiving port (16) is provided on the top of the cavity (10).

4. The air flow dryer according to claim 3, characterized in that: A conical guide structure (15) is provided on the top of the axis (111).

5. The air flow dryer according to claim 4, characterized in that: A grading wheel assembly is provided at the upper end of the cavity (10), and a discharge port of the grading wheel assembly is communicated with the receiving port (16).

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