A material cooling system for a low-temperature grain mill

Abstract

The application discloses a material cooling system of a low-temperature grain grinding machine, wherein a first-stage grinding unit, a second-stage grinding unit and a third-stage grinding unit are sequentially arranged from top to bottom in a tower-type grinding box body; the first-stage grinding unit comprises a pair of transversely parallel coarse grinding rollers; the second-stage grinding unit comprises a pair of transversely parallel semi-fine grinding rollers; and the third-stage grinding unit comprises a pair of transversely parallel fine grinding rollers; the inside of each coarse grinding roller, semi-fine grinding roller and fine grinding roller is provided with a liquid cooling structure capable of flowing through liquid; and in a low-temperature mode, the grinding rate of the cylindrical grinding roller wall is positively correlated with the liquid cooling efficiency, so that the cooling intensity is adapted to the actual heat generated in the grinding process.

Description

Technical Field

[0001] This invention belongs to the field of grinding mills. Background Technology

[0002] The heat generated by a roller mill mainly comes from the heat released during grain crushing, the frictional heat between grains and between grains and the grinding rollers, and the frictional heat generated during the operation of the roller bearings. Among these, the heat generated by bearing friction accounts for a small proportion and can be ignored. The heat source of the grinding rollers mainly comes from the heat released during grain crushing and the frictional heat between grains and between grains and the grinding rollers. When the roller mill is in operation, the roller surface temperature can reach 60~80℃.

[0003] When the temperature of grain flour exceeds 50℃, the starch breakage rate increases, and the high temperature will denature the protein, affecting the taste of the final food. When the target food has high requirements for taste and nutritional quality, the high temperature generated in this milling process will affect the final quality; however, for foods with less stringent requirements, there are no strict requirements for milling temperature. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a material cooling system for a low-temperature grain mill, which makes the grinding rate of the cylindrical grinding roller wall positively correlated with the liquid cooling efficiency in the low-temperature mode, so that the cooling intensity is adapted to the actual heat generation in the grinding process.

[0005] Technical Solution: To achieve the above objectives, the present invention provides a material cooling system for a low-temperature grain mill. The tower-type mill housing contains, from top to bottom, a primary grinding unit, a secondary grinding unit, and a tertiary grinding unit. The primary grinding unit includes a pair of horizontally parallel coarse grinding rollers; the secondary grinding unit includes a pair of horizontally parallel semi-fine grinding rollers; and the tertiary grinding unit includes a pair of horizontally parallel fine grinding rollers. Each coarse grinding roller, semi-fine grinding roller, and fine grinding roller is internally equipped with a liquid cooling structure through which liquid can flow.

[0006] Furthermore, the coarse grinding roller, the semi-fine grinding roller, and the fine grinding roller all include a cylindrical roller wall.

[0007] Furthermore, the grinding roller wall has an a-end wall and a b-end wall coaxially and integrally formed at both ends; the outer ends of the a-end wall and the b-end wall are respectively coaxially and integrally formed with a rotating shaft and a rotating shaft; the inner ends of the a-end wall and the b-end wall are respectively coaxially and integrally formed with a sleeve and a sleeve; the integral structure formed by the a-shaft, the a-end wall, and the a-sleeve has a through liquid inlet channel coaxially formed, which is connected to the cold water tank through a rotary joint; the integral structure formed by the b-shaft, the b-end wall, and the b-sleeve has a through liquid outlet channel coaxially formed.

[0008] Furthermore, the interior of the cylindrical grinding roller wall is a water-cooled column cavity; the side wall of the sleeve is circumferentially arrayed with several perforated holes; the liquid inlet channel connects to the area of ​​the water-cooled column cavity near the axis through the perforated holes.

[0009] Furthermore, the inner wall of the cylindrical grinding roller is integrally arranged with several heat exchange fins in a circumferential array. When the cylindrical grinding roller rotates along the axis, each heat exchange fin continuously rotates and agitates the cooling water in the water-cooled column cavity, causing the cooling water in the water-cooled column cavity to form a swirling flow under the continuous agitation of each heat exchange fin.

[0010] Furthermore, a transverse gravity-adaptive column is provided at the axial center of the water-cooled column cavity; one end of the gravity-adaptive column is integrally provided with a C-shaped rotating shaft, which is coaxially rotated with the A-sleeve through a bearing; the other end of the gravity-adaptive column is integrally provided with a C-sleeve, which is coaxially rotated with the B-sleeve through a bearing; the interior of the gravity-adaptive column is provided with a central column cavity coaxial with the cylindrical grinding roller wall, and one end of the central column cavity is coaxially connected to the liquid outlet channel; from the perspective of the axial direction, the outer peripheral surface of the gravity-adaptive column includes a constant velocity spiral vortex surface and an upward horizontal surface; the center of gravity of the gravity-adaptive column is located eccentrically at the axial center of the cylindrical grinding roller wall, and in the free state, the center of gravity of the gravity-adaptive column is directly below the axial center of the cylindrical grinding roller wall.

[0011] Furthermore, the rotation direction of the cylindrical grinding roller wall in the working state is denoted as rotation direction a. From the perspective of the axis, the path of the constant velocity spiral vortex surface gradually approaches the axis of the cylindrical grinding roller wall along rotation direction a. The end of the constant velocity spiral vortex surface near the axis of the cylindrical grinding roller wall and the end of the constant velocity spiral vortex surface away from the axis of the cylindrical grinding roller wall form an upward horizontal surface. An upward water inlet is provided on the upward horizontal surface. A smoothly curved liquid guiding channel is provided inside the gravity adaptive column. The curved liquid guiding channel connects the upward water inlet and the central column cavity. When the upward horizontal surface is impacted by liquid, the gravity adaptive column adaptively deflects around the axis of the cylindrical grinding roller wall.

[0012] Furthermore, a critical speed v is set. When the speed of the cylindrical grinding roller wall rotating in the rotation direction a does not exceed v, when the cylindrical grinding roller wall rotates in the rotation direction a, the swirling flow rotating in the rotation direction a in the water-cooled column cavity forms a continuous impact force on the horizontal surface. As a result, the gravity adaptive column deflects around the axis of the cylindrical grinding roller wall in the rotation direction a under the impact of the water. The gravity adaptive column will not continue to rotate with the swirling flow in the water-cooled column cavity, but will enter a relatively stable static equilibrium state.

[0013] When the speed at which the cylindrical grinding roller wall rotates in the rotational direction a exceeds v, the swirling flow rotating in the rotational direction a inside the water-cooled column cavity forms a continuous impact force on the horizontal surface, which is sufficient to drive the gravity adaptive column to overcome the torque brought by its own gravity and continue to rotate in the rotational direction a, thereby causing the gravity adaptive column and the water inside the water-cooled column cavity to rotate in the same direction.

[0014] Beneficial effects: Under normal grinding conditions requiring low temperatures, the cylindrical grinding roller wall of the present invention, within the range where the rotational speed of the cylindrical grinding roller wall is less than v, the higher the value of v, the higher the rate at which hot water is continuously discharged from the liquid outlet channel. Therefore, the grinding rate of the cylindrical grinding roller wall is positively correlated with the liquid cooling efficiency, and the cooling intensity is adapted to the actual heat generation during the grinding process. When the material being ground does not require low-temperature grinding, or when there is no grinding temperature limit, in order to improve grinding efficiency, the rotational speed of the cylindrical grinding roller wall is greater than v, and the gravity adaptive column and the water in the water-cooled column cavity rotate in the same direction, thereby reducing or eliminating the resistance of the gravity adaptive column to the horizontal surface of the water-cooled column cavity to the swirling flow, thereby reducing the rotational loss of the cylindrical grinding roller wall and suppressing the heat dissipation efficiency. Attached Figure Description

[0015] Figure 1 This is a front view of the grinding mill;

[0016] Figure 2 This is a side view of the grinding mill;

[0017] Figure 3 This is a schematic diagram of the coarse grinding roller;

[0018] Figure 4 Schematic diagram of a semi-finishing grinding roller;

[0019] Figure 5 This is a schematic diagram of a precision grinding roller;

[0020] Figure 6 This is a cross-sectional view of a coarse grinding roller / semi-fine grinding roller / fine grinding roller, with the structure of the outer surface of the roller hidden.

[0021] Figure 7 for Figure 6 Sectional view along direction A;

[0022] Figure 8 This is a schematic diagram of a gravity-adaptive column structure. Detailed Implementation

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] As attached Figures 1 to 8The material cooling system of a low-temperature grain mill shown includes a tower-type grinding chamber 2 fixedly supported by a machine bracket 7. A feed hopper 1 is provided at the upper end of the tower-type grinding chamber 2, and a discharge hopper 8 is provided at the lower end. A primary grinding unit 101, a secondary grinding unit 102, and a tertiary grinding unit 103 are arranged sequentially from top to bottom inside the tower-type grinding chamber 2. The primary grinding unit 101 receives material falling from the feed hopper 1, the secondary grinding unit 102 receives material falling from the primary grinding unit 101, the tertiary grinding unit 103 receives material falling from the secondary grinding unit 102, and the discharge hopper 8 receives material falling from the tertiary grinding unit 103. Figure 1 and 2 As shown. To enhance the cooling effect, the inside of the wall of the discharge hopper 8 is provided with a liquid guiding channel through which the coolant can flow.

[0025] The primary grinding unit 101 includes a pair of transversely parallel coarse grinding rollers 11, such as... Figure 3 As shown, the surfaces of the two coarse grinding rollers 11 are each arranged in a circumferential array with several extrusion protrusions 47 and several extrusion recesses 46; the extrusion protrusions 47 at the ends of the two coarse grinding rollers 11 that are close to each other extend into the extrusion recesses 46; two meshing first transmission gears 28 are synchronously installed on the rotating shafts at one end of the two coarse grinding rollers 11; when the first-stage grinding unit 101 is running, the linear motion of the ends of the two coarse grinding rollers 11 that are close to each other moves downward synchronously; when the grain passes between the two coarse grinding rollers 11, the grain is squeezed and impacted by the mutual crushing of the extrusion protrusions 47 and the extrusion recesses 46, so that the grain completes the coarse grinding process.

[0026] The secondary grinding unit 102 includes a pair of transversely parallel semi-finishing grinding rollers 10, such as... Figure 4 As shown, the surfaces of the two semi-fine grinding rollers 10 are each arranged in a circumferential array with several semi-fine grinding blades 48; the semi-fine grinding blades 48 at the ends of the two semi-fine grinding rollers 10 that are close to each other are staggered; two meshing second transmission gears 27 are synchronously installed on the rotating shafts at one end of the two semi-fine grinding rollers 10; when the secondary grinding unit 102 is running, the linear motion of the ends of the two semi-fine grinding rollers 10 that are close to each other is synchronously downward; when the coarsely ground grain passes between the two semi-fine grinding rollers 10, the grain is initially sheared and crushed by the interlaced semi-fine grinding blades 48, so that the grain completes the semi-fine grinding process.

[0027] The three-stage grinding unit 103 includes a pair of transversely parallel grinding rollers 9, such as Figure 5As shown, the surfaces of the two fine grinding rollers 9 are each arranged in a circumferential array with several fine grinding blades 49; the fine grinding blades 49 at the ends of the two fine grinding rollers 9 that are close to each other are staggered; two meshing third transmission gears 27 are synchronously installed on the rotating shafts at one end of the two fine grinding rollers 9; when the three-stage grinding unit 103 is running, the linear motion of the ends of the two fine grinding rollers 9 that are close to each other is synchronously downward; when the semi-finely ground grain passes between the two fine grinding rollers 9, the grain is further sheared and crushed under the action of the staggered fine grinding blades 49, so that the grain completes the fine grinding process.

[0028] The coarse grinding roller 11, the semi-fine grinding roller 10, and the fine grinding roller 9 all include a cylindrical roller wall 74, such as Figure 6 As shown; the outer wall of the cylindrical grinding roller 74 may be integrally provided with grinding blades, extrusion notches 46 or extrusion protrusions 47, etc. for grinding; the driving device can drive the coarse grinding roller 11, the semi-fine grinding roller 10 and the fine grinding roller 9 to rotate along the axis; each of the coarse grinding roller 11, the semi-fine grinding roller 10 and the fine grinding roller 9 is provided with a liquid cooling structure through which liquid can flow; the specific structure is as follows:

[0029] like Figure 6 , 7 As shown in Figure 8, the grinding roller wall 74 has an a-end wall 77 and a b-end wall 78 integrally and coaxially arranged at both ends; the outer ends of the a-end wall 77 and the b-end wall 78 are respectively integrally and coaxially arranged with a rotating shaft 30 and a rotating shaft 41; the a-shaft 30 and the b-shaft 41 are both rotatably mounted on bearing seats via bearings; the inner ends of the a-end wall 77 and the b-end wall 78 are respectively integrally and coaxially arranged with a sleeve 31 and a sleeve 39; the integral structure formed by the a-shaft 30, the a-end wall 77 and the a-sleeve 31 has a through liquid inlet channel 96, which is connected to the cold water tank via a rotary joint; the b-shaft 41 and the b-end wall 78 are respectively integrally and coaxially arranged with a rotating shaft 30, the a-end wall 77 and the a-sleeve 39. The integrated structure formed by the wall 78 and the sleeve 39 has a liquid outlet channel 97 coaxially connected; the interior of the cylindrical grinding roller wall 74 is a water-cooled column cavity 35; the side wall of the sleeve 31 has several perforated holes 34 arranged in a circumferential array; the liquid inlet channel 96 connects to the area near the axis of the water-cooled column cavity 35 through the perforated holes 34; the inner wall of the cylindrical grinding roller wall 74 has several heat exchange fins 38 arranged in a circumferential array. When the cylindrical grinding roller wall 74 rotates along the axis, each heat exchange fin 38 continuously rotates and agitates the cooling water in the water-cooled column cavity 35, so that the cooling water in the water-cooled column cavity 35 forms a swirling flow under the continuous agitation of each heat exchange fin 38.

[0030] A transverse gravity adaptive column 36 is provided at the axial center of the water-cooled column cavity 35; a c-rotating shaft 32 is integrally provided at one end of the gravity adaptive column 36, and the c-rotating shaft 32 is coaxially rotated with the a-sleeve 31 through a bearing; a c-sleeve 40 is integrally provided at the other end of the gravity adaptive column 36, and the c-sleeve 40 is coaxially rotated with the b-sleeve 39 through a bearing.

[0031] The gravity adaptive column 36 has a central column cavity 33 coaxial with the cylindrical grinding roller wall 74 inside, and one end of the central column cavity 33 is coaxially connected to the liquid outlet channel 97.

[0032] like Figure 7 As shown, from the perspective along the axis, the outer peripheral surface of the gravity adaptive column 36 includes a constant velocity spiral vortex surface 43 and an upward horizontal surface 45; the center of gravity 112 of the gravity adaptive column 36 is located eccentrically at the axis 111 of the cylindrical grinding roller wall 74, and in the free state, the center of gravity 112 of the gravity adaptive column 36 is directly below the axis 111 of the cylindrical grinding roller wall 74.

[0033] like Figure 7 As shown, the rotation direction of the cylindrical grinding roller wall 74 in the working state is denoted as rotation direction 99.

[0034] From the perspective of the axis, the path of the constant velocity spiral vortex surface 43 gradually approaches the axis of the cylindrical grinding roller wall 74 along the rotation direction a 99. The end of the constant velocity spiral vortex surface 43 that is close to the axis 111 of the cylindrical grinding roller wall 74 and the end of the constant velocity spiral vortex surface 43 that is away from the axis 111 of the cylindrical grinding roller wall 74 form a horizontal surface 45. A frontal water inlet 44 is provided on the horizontal surface 45. A smoothly curved liquid guiding channel 37 is provided in the gravity adaptive column 36. The curved liquid guiding channel 37 connects the frontal water inlet 44 and the central column cavity 33. When the horizontal surface 45 is impacted by liquid, the gravity adaptive column 36 adaptively deflects around the axis 111 of the cylindrical grinding roller wall 74.

[0035] Cooling principle:

[0036] During operation, the cylindrical grinding roller wall 74 rotates around the axis 111 in the rotation direction 99. The cooling water in the water-cooled column cavity 35 continuously absorbs the heat from the heat exchange fins 38 and the inner wall of the cylindrical grinding roller wall 74, thereby continuously removing the heat generated by the friction between the cylindrical grinding roller wall 74 and the material during operation. At the same time, the cylindrical grinding roller wall 74 also continuously absorbs the heat generated by the material on the outer periphery during the grinding process due to intense compression and friction, thus achieving the purpose of low-temperature grinding.

[0037] A critical speed v is set. Under normal grinding conditions where low temperature is required, the speed of the cylindrical grinding roller wall 74 is lower than v. When the material being ground does not require low-temperature grinding, or when there is no grinding temperature limit, the speed of each cylindrical grinding roller wall 74 will be higher than v in order to improve grinding efficiency.

[0038] When the speed at which the cylindrical grinding roller wall 74 rotates in the rotation direction 99 does not exceed v, the heat exchange fins 38 continuously rotate and agitate the cooling water in the water-cooled column cavity 35, causing the cooling water in the water-cooled column cavity 35 to form a swirling flow rotating in the rotation direction 99 under the continuous agitation of the heat exchange fins 38. The swirling flow rotating in the rotation direction 99 in the water-cooled column cavity 35 forms a continuous impact force against the horizontal surface 45, thereby causing the gravity adaptive column 36 to deflect around the axis 111 of the cylindrical grinding roller wall 74 in the rotation direction 99 under the impact of the water, thus causing the gravity adaptive column to... The center of gravity 112 of the gravity adaptive column 36 deflects around the axis 111 of the cylindrical grinding roller wall 74. The deflection angle of the center of gravity 112 of the gravity adaptive column 36 around the axis 111 of the cylindrical grinding roller wall 74 is less than 90°. The higher the deflection angle of the gravity adaptive column 36, the greater the torque in the opposite direction of rotation 99 due to gravity becomes, until the torque brought by the gravity of the gravity adaptive column 36 is balanced by the torque brought by the impact force on the horizontal surface 45. Therefore, the gravity adaptive column 36 will not continuously rotate with the swirling flow in the water-cooled column cavity 35, but will instead enter a relative... A stable static equilibrium state is maintained. Simultaneously, as the swirling flow rotating in the direction of a99 within the water-cooled column cavity 35 continuously impacts the horizontal surface 45 in its static equilibrium state, water within the water-cooled column cavity 35, under the influence of water kinetic energy and inertia, surges into the curved liquid guiding channel 37 through the inlet 44, thus creating continuous water pressure within the curved liquid guiding channel 37. Subsequently, the water in the curved liquid guiding channel 37 is continuously forced into the central column cavity 33, and finally, the water in the central column cavity 33 is continuously discharged through the outlet channel 97 under the action of water pressure. At the same time, water in the region near the axis within the water-cooled column cavity 35 undergoes centrifugal motion... A stable negative pressure is formed, and under the action of the negative pressure, the external cold water source continuously replenishes the area near the axis of the water-cooled column cavity 35 from the liquid inlet channel 96 through the hollow hole 34, thereby forming an adaptively driven cooling water circulation. In the above process, within the range where the rotational speed of the cylindrical grinding roller wall 74 is less than v, the higher the value of v, the higher the swirling rotation speed in the water-cooled column cavity 35, the stronger the impact force on the horizontal surface 45, and the higher the rate at which hot water is continuously discharged from the liquid outlet channel 97. Therefore, the grinding rate of the cylindrical grinding roller wall 74 is positively correlated with the liquid cooling efficiency, and the cooling intensity is adapted to the actual heat generation in the grinding process.

[0039] When the material being ground does not require low-temperature grinding, or when there is no grinding temperature limit, in order to improve grinding efficiency, the rotational speed of each cylindrical grinding roller wall 74 is higher than v. When the speed of the cylindrical grinding roller wall 74 rotating in the rotation direction a 99 exceeds v, the swirling flow rotating in the rotation direction a 99 in the water-cooled column cavity 35 forms a continuous impact force on the horizontal surface 45, which is sufficient to drive the gravity adaptive column 36 to overcome the torque brought by its own gravity and continue to rotate in the rotation direction a 99. This causes the gravity adaptive column 36 to rotate in the same direction as the water in the water-cooled column cavity 35, thereby reducing or eliminating the resistance of the horizontal surface 45 of the gravity adaptive column 36 to the swirling flow in the water-cooled column cavity 35, thereby reducing the rotational loss of the cylindrical grinding roller wall 74 and suppressing the heat dissipation efficiency.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A material cooling system for a low-temperature grain mill, comprising a tower-type milling box (2), wherein a primary milling unit (101), a secondary milling unit (102), and a tertiary milling unit (103) are arranged sequentially from top to bottom within the tower-type milling box (2); the primary milling unit (101) comprises a pair of transversely parallel coarse grinding rollers (11); the secondary milling unit (102) comprises a pair of transversely parallel semi-fine grinding rollers (10); and the tertiary milling unit (103) comprises a pair of transversely parallel fine grinding rollers (9); characterized in that: Each of the coarse grinding roller (11), semi-fine grinding roller (10) and fine grinding roller (9) is equipped with a liquid cooling structure through which liquid can flow; The coarse grinding roller (11), the semi-fine grinding roller (10), and the fine grinding roller (9) all include a cylindrical grinding roller wall (74); the two ends of the grinding roller wall (74) are respectively coaxially and integrally provided with an a-end wall (77) and a b-end wall (78); the outer ends of the a-end wall (77) and the b-end wall (78) are respectively coaxially and integrally provided with an a-shaft (30) and a b-shaft (41); the inner ends of the a-end wall (77) and the b-end wall (78) are respectively coaxially and integrally provided with an a-sleeve (31) and a b-sleeve (39); the integral structure formed by the a-shaft (30), the a-end wall (77), and the a-sleeve (31) is coaxially provided with a through liquid inlet channel (96), and the liquid inlet channel (96) is connected to the cold water tank through a rotary joint; the integral structure formed by the b-shaft (41), the b-end wall (78), and the b-sleeve (39) is coaxially and integrally provided with an outlet channel (97). The interior of the cylindrical grinding roller wall (74) is a water-cooled column cavity (35); the side wall of the sleeve (31) is circumferentially arrayed with several perforated holes (34); the liquid inlet channel (96) is connected to the area near the axis of the water-cooled column cavity (35) through the perforated holes (34); The inner wall of the cylindrical grinding roller wall (74) is provided with several heat exchange fins (38) arranged in a circular array. When the cylindrical grinding roller wall (74) rotates along the axis, each heat exchange fin (38) continuously rotates and stirs the cooling water in the water-cooled column cavity (35), so that the cooling water in the water-cooled column cavity (35) forms a swirling flow under the continuous stirring of each heat exchange fin (38). A transverse gravity adaptive column (36) is provided at the axial center of the water-cooled column cavity (35); a c-rotor (32) is integrally provided at one end of the gravity adaptive column (36), and the c-rotor (32) is coaxially rotated with the a-sleeve (31) through a bearing; a c-sleeve (40) is integrally provided at the other end of the gravity adaptive column (36), and the c-sleeve (40) is coaxially rotated with the b-sleeve (39) through a bearing; the interior of the gravity adaptive column (36) is provided with a structure coaxial with the cylindrical grinding roller wall (74). The central column cavity (33) is coaxially connected to the liquid outlet channel (97) at one end; from the perspective of the axis, the outer peripheral surface of the gravity adaptive column (36) includes a constant velocity spiral vortex surface (43) and an upward horizontal surface (45); the center of gravity (112) of the gravity adaptive column (36) is located eccentrically at the axis (111) of the cylindrical grinding roller wall (74), and in the free state, the center of gravity (112) of the gravity adaptive column (36) is directly below the axis (111) of the cylindrical grinding roller wall (74).

2. The material cooling system of a low-temperature grain mill according to claim 1, characterized in that: The rotation direction of the cylindrical grinding roller wall (74) in the working state is denoted as rotation direction a (99). From the perspective of the axis, the path of the constant velocity spiral surface (43) gradually approaches the axis of the cylindrical grinding roller wall (74) along the rotation direction a (99). The end of the constant velocity spiral surface (43) close to the axis (111) of the cylindrical grinding roller wall (74) and the end of the constant velocity spiral surface (43) away from the axis (111) of the cylindrical grinding roller wall (74) are... A horizontal surface (45) is formed between them, and a water inlet (44) is provided on the horizontal surface (45). A smooth curved liquid guiding channel (37) is provided inside the gravity adaptive column (36). The curved liquid guiding channel (37) connects the water inlet (44) and the central column cavity (33). When the horizontal surface (45) is impacted by liquid, the gravity adaptive column (36) adaptively deflects around the axis (111) of the cylindrical grinding roller wall (74).

3. The material cooling system of a low-temperature grain mill according to claim 2, characterized in that: Set a critical speed v. When the speed of the cylindrical grinding roller wall (74) rotating in the rotation direction (99) does not exceed v, when the cylindrical grinding roller wall (74) rotates in the rotation direction (99), the swirling flow rotating in the rotation direction (99) in the water-cooled column cavity (35) forms a continuous impact force on the horizontal surface (45), so that the gravity adaptive column (36) deflects around the axis (111) of the cylindrical grinding roller wall (74) in the rotation direction (99) under the impact of water. The gravity adaptive column (36) will not continue to rotate with the swirling flow in the water-cooled column cavity (35), but will enter a relatively stable static equilibrium state. When the speed of the cylindrical grinding roller wall (74) rotating in the rotation direction (99) exceeds v, the swirling flow rotating in the rotation direction (99) inside the water-cooled column cavity (35) forms a continuous impact force against the horizontal surface (45), which is sufficient to drive the gravity adaptive column (36) to overcome the torque brought by its own gravity and continue to rotate in the rotation direction (99), so that the gravity adaptive column (36) and the water inside the water-cooled column cavity (35) rotate in the same direction.

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