CN-118751318-B - Material cooling system of low-temperature grain flour mill

Abstract

The invention discloses a material cooling system of a low-temperature grain mill, wherein a first-stage grinding unit, a second-stage grinding unit and a third-stage grinding unit are sequentially arranged in a tower-type grinding box body from top to bottom, the first-stage grinding unit comprises a pair of rough grinding rollers which are transversely and parallelly matched, the second-stage grinding unit comprises a pair of semi-fine grinding rollers which are transversely and parallelly matched, the third-stage grinding unit comprises a pair of fine grinding rollers which are transversely and parallelly matched, liquid cooling structures capable of flowing through liquid are arranged in the rough grinding rollers, the semi-fine grinding rollers and the fine grinding rollers, the grinding speed and the liquid cooling efficiency of a cylindrical grinding roller wall are positively correlated in a low-temperature mode, and the cooling strength is adapted to the actual heating value in the grinding process.

Inventors

• SHEN LIUYANG
• LIU RAN
• JIANG XUAN
• ZHUANG YU
• YAO HAIFENG
• LIU CHENGHAI
• ZHAO XINGLONG
• ZHENG XIANZHE
• LIU CHA

Assignees

• 东北农业大学

Dates

Publication Date

20260505

Application Date

20240815

Claims (3)

1. 1. A material cooling system of a low-temperature grain mill comprises a tower-type milling box body (2), wherein a primary milling unit (101), a secondary milling unit (102) and a tertiary milling unit (103) are sequentially arranged in the tower-type milling box body (2) from top to bottom, the primary milling unit (101) comprises a pair of rough milling rollers (11) which are transversely and parallelly matched, the secondary milling unit (102) comprises a pair of semi-fine milling rollers (10) which are transversely and parallelly matched, the tertiary milling unit (103) comprises a pair of fine milling rollers (9) which are transversely and parallelly matched, and the material cooling system is characterized in that liquid cooling structures capable of flowing through liquid are arranged in each rough milling roller (11), each semi-fine milling roller (10) and each fine milling roller (9); The rough grinding roller (11), the semi-fine grinding roller (10) and the fine grinding roller (9) comprise cylindrical grinding roller walls (74), an a end wall (77) and a b end wall (78) are coaxially and integrally arranged at two ends of the grinding roller walls (74), an a rotating shaft (30) and a b rotating shaft (41) are coaxially and integrally arranged at the outer ends of the a end wall (77) and the b end wall (78), an a sleeve (31) and a b sleeve (39) are coaxially and integrally arranged at the inner ends of the a end wall (77) and the b end wall (78), a through liquid inlet channel (96) is coaxially arranged in an integral structure formed by the a rotating shaft (30), the a end wall (77) and the a sleeve (31), the liquid inlet channel (96) is communicated with a cold water tank through a rotary joint, and a liquid outlet channel (97) is coaxially and coaxially arranged in an integral structure formed by the b rotating shaft (41), the b end wall (78) and the b sleeve (39). The inside of the cylindrical grinding roller wall (74) is provided with a water-cooling column cavity (35), a side wall of the sleeve (31) is provided with a plurality of hollowed holes (34) in a hollowed-out mode in a circumferential array, and a liquid inlet channel (96) is communicated with a region, close to the axis, of the water-cooling column cavity (35) through the hollowed holes (34); the inner wall of the cylindrical grinding roller wall (74) is integrally provided with a plurality of heat exchange fins (38) in a circumferential array, and when the cylindrical grinding roller wall (74) rotates along an axis, each heat exchange fin (38) continuously rotates to stir cooling water in the water-cooling column cavity (35) so that the cooling water in the water-cooling column cavity (35) forms a rotational flow under the continuous stirring of each heat exchange fin (38); A horizontal gravity self-adapting column (36) is arranged at the axis of the water-cooling column cavity (35), a c rotating shaft (32) is integrally arranged at one end of the gravity self-adapting column (36), the c rotating shaft (32) is in coaxial rotation fit with the a sleeve (31) through a bearing, a c sleeve (40) is integrally arranged at the other end of the gravity self-adapting column (36), the c sleeve (40) is coaxially sleeved with the b sleeve (39) through a bearing, a central column cavity (33) coaxial with the cylindrical grinding roller wall (74) is arranged in the gravity self-adapting column (36), one end of the central column cavity (33) is coaxially communicated with a liquid outlet channel (97), the outer circumferential surface of the gravity self-adapting column (36) comprises a constant velocity spiral vortex surface (43) and a horizontal plane (45) along the axis view angle, the gravity center (112) of the gravity self-adapting column (36) is arranged at the eccentric position of the axis (111) of the cylindrical grinding roller wall (74), and the gravity center (112) of the gravity self-adapting column (36) is arranged right below the axis (111) of the cylindrical grinding roller wall (74) in a free state.
2. 2. A material cooling system of a low-temperature grain mill according to claim 1, wherein the rotation direction of the cylindrical mill roll wall (74) in the working state is denoted as a rotation direction (99), a path of the constant velocity spiral vortex surface (43) gradually approaches to the axle center of the cylindrical mill roll wall (74) along the a rotation direction (99) along the axis view angle, a horizontal plane (45) is formed between one end of the constant velocity spiral vortex surface (43) near to the axle center (111) of the cylindrical mill roll wall (74) and one end of the constant velocity spiral vortex surface (43) far away from the axle center (111) of the cylindrical mill roll wall (74), an inlet face water inlet (44) is arranged on the horizontal plane (45), a curve liquid guide channel (37) with smooth path is arranged in the gravity self-adapting column (36), the curve liquid guide channel (37) is communicated with the inlet face water inlet (44) and the central column cavity (33), and when the horizontal plane (45) receives liquid impact, the gravity self-adapting column (36) is deflected around the axle center (111) of the cylindrical mill roll wall (74).
3. 3. A material cooling system of a low temperature grain mill according to claim 2, wherein a critical rotation speed v is set, when the speed of rotation of the cylindrical grinding roller wall (74) in the a rotation direction (99) does not exceed v, the rotational flow in the a rotation direction (99) in the water-cooling column cavity (35) forms continuous impact force to the horizontal plane (45) when the cylindrical grinding roller wall (74) rotates in the a rotation direction (99), so that the gravity adaptive column (36) deflects towards the a rotation direction (99) around the axis (111) of the cylindrical grinding roller wall (74) under the impact of water, the gravity adaptive column (36) does not continuously rotate along with the rotational flow in the water-cooling column cavity (35), but the gravity adaptive column (36) enters a relatively stable static equilibrium state; When the speed of the cylindrical grinding roller wall (74) rotating along the a rotating direction (99) exceeds v, the rotational flow rotating along the a rotating direction (99) in the water-cooling column cavity (35) forms continuous impact force on the horizontal plane (45) and is enough to drive the gravity self-adaptive column (36) to continuously rotate along the a rotating direction (99) against the torque brought by the gravity of the gravity self-adaptive column, so that the gravity self-adaptive column (36) and water in the water-cooling column cavity (35) do the same-direction rotating motion.

Description

Material cooling system of low-temperature grain flour mill Technical Field The invention belongs to the field of flour mills. Background The heat of the roller mill is mainly derived from the heat released by crushing grains, the frictional heat between grains and the grinding roller, and the frictional heat during the running of the grinding roller bearing. The heat generated by friction of the bearings is small in proportion and negligible, the heat source of the grinding roller mainly comes from heat released by crushing grains, friction heat between grains and the grinding roller, and the temperature of the roller surface of the roller mill can reach 60-80 ℃ when the roller mill is operated. When the temperature of the grain powder exceeds 50 ℃, the starch breaking rate is increased, the high temperature can denature protein to influence the taste of the final food, when the taste of the target food and the quality of the nutrient substances are required to be high, the high temperature generated in the grinding process can influence the final quality, and the food with low requirements has no strict grinding temperature requirement. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a material cooling system of a low-temperature grain mill, which enables the milling speed of a cylindrical mill roll wall to be positively correlated with liquid cooling efficiency in a low-temperature mode, and enables the cooling intensity to be adapted to the actual heating value in the milling process. According to the technical scheme, in order to achieve the purposes, the material cooling system of the low-temperature grain mill is characterized in that a first-stage grinding unit, a second-stage grinding unit and a third-stage grinding unit are sequentially arranged in a tower-type grinding box body from top to bottom, the first-stage grinding unit comprises a pair of rough grinding rollers which are transversely matched in parallel, the second-stage grinding unit comprises a pair of semi-fine grinding rollers which are transversely matched in parallel, the third-stage grinding unit comprises a pair of fine grinding rollers which are transversely matched in parallel, and liquid cooling structures capable of flowing through liquid are arranged inside each of the rough grinding rollers, the semi-fine grinding rollers and the fine grinding rollers. Further, the rough grinding roll, the semi-finish grinding roll and the finish grinding roll each include a cylindrical grinding roll wall. Further, an end wall a and an end wall b are coaxially and integrally arranged at two ends of the grinding roller wall respectively, an outer end of the end wall a and an outer end of the end wall b are coaxially and integrally provided with an a rotating shaft and an outer end of the end wall b respectively, an inner end of the end wall a and an inner end of the end wall b are coaxially and integrally provided with an a sleeve and an inner sleeve respectively, a through liquid inlet channel is coaxially arranged in an integral structure formed by the a rotating shaft, the end wall a and the sleeve a, the liquid inlet channel is communicated with a cold water tank through a rotary joint, and a liquid outlet channel is coaxially arranged in an integral structure formed by the rotating shaft b, the end wall b and the sleeve b. Furthermore, a water-cooling column cavity is arranged in the cylindrical grinding roller wall, a plurality of hollowed holes are hollowed out in the circumferential array of the side wall of the sleeve, and a liquid inlet channel is communicated with the area, close to the axis, of the water-cooling column cavity through the hollowed holes. Further, the inner wall of the cylindrical grinding roller wall is integrally provided with a plurality of heat exchange fins in a circumferential array, and when the cylindrical grinding roller wall rotates along the axis, each heat exchange fin continuously rotates to stir cooling water in the water-cooling column cavity, so that the cooling water in the water-cooling column cavity forms a rotational flow under the continuous stirring of each heat exchange fin. The gravity self-adaptive column is characterized in that a horizontal gravity self-adaptive column is arranged at the axis of the water-cooling column cavity, a c rotating shaft is integrally arranged at one end of the gravity self-adaptive column, the c rotating shaft is in coaxial rotation fit with the a sleeve through a bearing, a c sleeve is integrally arranged at the other end of the gravity self-adaptive column, the c sleeve is in coaxial rotation sleeve joint with the b sleeve through a bearing, a central column cavity which is coaxial with the cylindrical grinding roller wall is arranged in the gravity self-adaptive column, one end of the central column cavity is coaxially communicated with a liquid outlet channel, the outer peripheral surface of the gravity self-a