High-temperature fan of granulating and drying hot-blast stove

Abstract

The high-temperature fan of the granulating and drying hot-blast stove relates to the technical field of compound fertilizer processing and production and comprises a base, a bearing support is fixed to the rear end of the base, a main shaft is rotationally installed in the middle of the bearing support, a main umbrella wheel is coaxially arranged at the input end of the main shaft, and trapezoidal fins are fixed to the position, close to the main umbrella wheel, of the rear end of the main shaft; the spindle is sleeved with a shaft sleeve, and a labyrinth seal is arranged at the front end of the shaft sleeve. In the using process, only one motor needs to be arranged, energy is supplied to the high-temperature fan, meanwhile, automatic circulation of cooling water is achieved through linkage driving of the circulation assembly, heat exchange cooling is conducted on the circulating cooling water through the cooling fan, and due to the fact that compressor refrigeration and water pump circulation do not need to be used, the cooling efficiency is greatly improved. Therefore, efficient circulating cooling of the cooling water can be achieved with a simple structure and extremely low cost, the problem of abrasion between parts of the fan caused by high-temperature expansion is solved, and heat transmitted to the bearing from a high-temperature medium is effectively controlled.

Description

Technical Field

[0001] The invention relates to the technical field of compound fertilizer processing and production, in particular to a high-temperature fan of a granulation and drying hot air furnace. Background Art

[0002] In recent years, with the continuous improvement of agricultural production technology and the increasing demand for high-efficiency fertilizers for agricultural products, the compound fertilizer market has gradually grown. Therefore, the production process of compound fertilizer is crucial.

[0003] The fan is a very critical equipment in the compound fertilizer granulation and drying process. Since the compound fertilizer granulation and drying process requires a high temperature of ~600°C and corrosive flue gas, if the material of the fan, the structure of the casing, the impeller, the cooling device at the shaft end, etc. are not reasonably selected and designed, the fan will not be able to operate stably for a long time, causing economic losses and even safety accidents. The present invention aims to propose a high-temperature fan for a granulation and drying hot air furnace, which effectively solves the above problems and ensures the long-term stable and safe operation of the fan.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a high-temperature fan for a granulation drying hot air furnace is proposed. Summary of the invention

[0005] The object of the present invention is to provide a high-temperature blower for a granulation and drying hot air furnace to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-temperature blower for a granulation and drying hot air furnace, comprising a base, a bearing bracket being fixed at the rear end of the base, and a main shaft being rotatably installed in the middle of the bearing bracket, a main umbrella wheel being coaxially arranged at the input end of the main shaft, and a trapezoidal fin being fixed at the rear end of the main shaft near the main umbrella wheel, a shaft sleeve being provided on the outer sleeve of the main shaft, and a labyrinth seal being provided at the front end of the shaft sleeve, flanges being integrally fixed at both ends of the labyrinth seal, and five high-temperature resistant copper sealing teeth being inlaid inside the labyrinth seal.

[0007] Furthermore, a fan bracket is fixed to the front end of the base, and the rear side plate of the fan bracket is fixed to the front end flange bolts of the labyrinth seal, and the fan bracket is raised to the same plane as the bearing bracket, and the four supporting legs at the root of the fan bracket use the anchor bolt on one of the supporting legs as a positioning hole to open waist-shaped holes along the expansion direction and the size of the expansion amount.

[0008] Furthermore, a casing is fixed inside the fan brackets at the front and rear ends, and an impeller body is rotatably installed inside the casing. The impeller body is fixed to the main shaft output end by a bullet-type nut made of FV520B, and the rear disk of the impeller body is welded to the shaft sleeve and a reinforcement plate and a triangular rib plate are welded. A reinforcement ring is designed in the middle of the impeller body, and a reinforcement ring is designed on the outer circle of the front disk of the impeller body.

[0009] Furthermore, a water cooling mechanism is fixed in the middle of the sleeve, and the water cooling mechanism includes a water cooler and a sealing ring. The water cooler is fixed to the rear end flange of the labyrinth seal by bolts, and the water cooler has a cylindrical structure, and is fixed to the middle screw of the sleeve by the sealing ring.

[0010] Furthermore, the water cooling mechanism also includes a water outlet, a water inlet, a curved plate and a through hole. The water outlet is provided at the bottom of the water cooler, and the water inlet is provided at the top of the water cooler. An curved plate with a concave surface facing upward is fixed on the upper part of the water cooler, and the curved plate divides the interior of the water cooler into an upper cavity and a lower cavity. The curved plate is arranged parallel to the top of the shaft sleeve, and a plurality of through holes are provided at the bottom of the curved plate. The coolant in the upper cavity of the curved plate flows into the lower cavity along the shaft sleeve through the through holes and takes away the heat on the shaft sleeve.

[0011] Furthermore, the water cooling mechanism also includes a heat exchange coil, a connecting elbow and a water inlet interface. The heat exchange coil is fixed to the rear side plate of the water cooler away from the labyrinth seal, and the outlet end of the heat exchange coil is connected to the water inlet at the top of the water cooler through the connecting elbow, and the inlet end of the heat exchange coil is provided with a water inlet interface.

[0012] Furthermore, a gantry fixed to the base is provided on one side of the main shaft input end, and a motor is fixed to the outer side of the gantry with bolts, a driving cone wheel is fixedly connected to the output end of the motor, and one side of the driving cone wheel is rotated by the main bevel wheel and the main shaft.

[0013] Furthermore, the other side of the driving cone wheel is transmission-connected with a circulation component, and the circulation component includes a sleeve, a drain pipe and a return pipe. The top of the rear end of the sleeve is connected to the drain pipe through a one-way valve, and the end of the drain pipe is connected to the water inlet interface at the inlet end of the heat exchange coil. The bottom of the rear end of the sleeve is connected to the return pipe through a one-way valve, and the end of the return pipe is connected to the water outlet at the bottom of the water cooler.

[0014] Furthermore, the circulation component also includes a connecting plate, a rotating rod and a secondary umbrella wheel. The outside of the sleeve is welded and fixed to the gantry through the connecting plate, and a rotating rod is rotatably installed at the front end of the sleeve. The secondary umbrella wheel is coaxially arranged at the input end of the rotating rod, and the secondary umbrella wheel is meshed with the other side of the driving cone wheel for transmission.

[0015] Furthermore, the circulation component also includes a cooling fan, a cam column, a sleeve and a piston. The front end of the rotating rod is coaxially connected to the cooling fan, and the cooling fan cooperates with the trapezoidal heat dissipation surface of the trapezoidal fins. The output end of the rotating rod is coaxially provided with a cam column, and the cam groove on the surface of the cam column is slidably matched with the sleeve. The sleeve is fixed integrally with the piston, and the piston is tightly matched with the inner wall of the sleeve through a circumferential sealing ring.

[0016] The present invention provides a high-temperature blower for a granulation and drying hot air furnace, which has the following beneficial effects:

[0017] 1. During use of the present invention, the shaft end cooling device of the present application is composed of three structural units. The first structural unit is a labyrinth seal, in which five high-temperature resistant copper sealing teeth are inlaid. After the high-temperature gas medium leaks out from the shaft hole of the casing and enters the labyrinth, the amount of heat decreases layer by layer. The second structural unit is a water cooler. The third structural unit is a trapezoidal fin, which is directly fixed on the main shaft. The heat is dissipated to the surrounding air through the high-speed rotation of the main shaft to reduce the contact with the bearing bracket and protect the bearing from high temperature. The present application only needs to set up one motor. While supplying energy to the high-temperature fan, the automatic circulation of cooling water is realized by the linkage drive of the circulation component, and the cooling fan is used to cool the circulating cooling water. Because there is no need to use compressor refrigeration and water pump circulation, efficient circulation cooling of cooling water can be achieved with a streamlined structure and extremely low cost, which solves the wear problem between the various parts of the fan caused by high-temperature expansion and effectively controls the heat transmitted to the bearing by the high-temperature medium.

[0018] 2. During the use of the present invention, the casing and the front air inlet of the present application are made of 304 stainless steel, a support tube is added inside the casing to strengthen the rigidity, the fan bracket is raised to the same plane as the bearing bracket, and the stability is improved by reducing the center height. During installation, the anchor bolt hole on any one of the legs is selected as the positioning hole, and the anchor bolt holes on the other three legs are opened along the expansion direction and the size of the expansion amount of the positioning hole. Waist-round holes are effectively avoided to prevent the matching clearance between parts from changing due to high-temperature expansion, causing mechanical damage. In addition, the impeller body is made of material The bullet-shaped nut made of FV520B is fixed to the output end of the main shaft, which not only ensures the smoothness of the airflow, but also protects the main shaft from corrosion. The rear disc of the impeller body is welded to the shaft sleeve and welded with a reinforcement plate and a triangular rib plate. The middle part of the impeller body is designed with a reinforcement ring and the outer circle of the front disc is designed with a reinforcement ring. The structural design can effectively enhance the rigidity of the impeller body to reduce the deformation and ensure the strength of the impeller body running at high temperatures. All parts of the impeller body are made of the same material and all adopt a welded structure. The overall deformation is consistent, the high temperature resistance is good, and the structure is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall southwest isometric structure of the device of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall northeast isometric structure of the device of the present invention;

[0021] Figure 3 This is a schematic diagram of the explosion structure of the casing of the present invention;

[0022] Figure 4 It is a schematic cross-sectional structure diagram of the shaft end cooling device of the present invention;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the labyrinth seal of the present invention;

[0024] Figure 6 It is a schematic cross-sectional structural diagram of the water cooling mechanism of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the motor transmission device of the present invention;

[0026] Figure 8 It is a schematic cross-sectional structural diagram of the circulation component of the present invention.

[0027] In the figure: 1, base; 2, fan bracket; 3, casing; 4, impeller body; 5, bearing bracket; 6, main shaft; 7, main umbrella wheel; 8, trapezoidal fin; 9, sleeve; 10, labyrinth seal; 11, flange; 12, sealing tooth; 13, water cooling mechanism; 1301, water cooler; 1302, sealing ring; 1303, water outlet; 1304, water inlet; 1305, arc plate; 1306, through hole; 1307, water cooler; 1308, water cooler; 1309, water cooler; 1310, water cooler; 1311, water cooler; 1312, water cooler; 1313, water cooler; 1314, water cooler; 1315, water cooler; 1316, water cooler; 1317, water cooler; 1318, water cooler; 1319, water cooler; 1320, water cooler; 1321, water cooler; 1322, water cooler; 1323, water cooler; 1324, water cooler; 1325, water cooler; 1326, water cooler; 1327, water cooler; 1328, water cooler; 1329, water cooler; 1330, water cooler; 1331, water cooler; 1332, water cooler; 1333, water cooler; 1334, water cooler; 1335, water cooler; 1336, water cooler; 1337, water cooler; 1338, water cooler; 1339, water cooler; 1340, water cooler; 1341, water cooler; 1342, water cooler; 13 7. Heat exchange coil; 1308. Connecting elbow; 1309. Water inlet interface; 14. Gantry; 15. Motor; 16. Driving cone wheel; 17. Circulation component; 1701. Sleeve; 1702. Drain pipe; 1703. Return pipe; 1704. Connecting plate; 1705. Rotating rod; 1706. Auxiliary umbrella wheel; 1707. Cooling fan; 1708. Cam column; 1709. Sliding sleeve; 1710. Piston. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0029] See also Figures 1 to 5The present invention provides a technical solution: a high-temperature fan of a granulation drying hot air furnace, comprising a base 1, a fan bracket 2 is fixed at the front end of the base 1, and the rear side plate of the fan bracket 2 is bolted to the front end flange 11 of the labyrinth seal 10, and the fan bracket 2 is raised to the same plane as the bearing bracket 5, and the four supporting feet at the root of the fan bracket 2 use the anchor bolt on one of the supporting feet as a positioning hole to open a waist-shaped hole along the expansion direction and the size of the expansion amount, and the fan bracket 2 at the front and rear ends is fixed with a casing 3, and the casing 3 is rotatably installed with an impeller body 4, and the impeller body 4 is connected to the main shaft 6 through a bullet-shaped nut made of FV520B. The output end is fixed, and the rear disk of the impeller body 4 is welded on the shaft sleeve 9 and welded with a reinforcement plate and a triangular rib plate. A reinforcement ring is designed in the middle of the impeller body 4, and a reinforcement ring is designed on the outer circle of the front disk of the impeller body 4. A bearing bracket 5 is fixed at the rear end of the base 1, and a main shaft 6 is rotatably installed in the middle of the bearing bracket 5. The input end of the main shaft 6 is coaxially provided with a main umbrella wheel 7, and a trapezoidal fin 8 is fixed at the rear end of the main shaft 6 near the main umbrella wheel 7. A shaft sleeve 9 is provided on the outside of the main shaft 6, and a labyrinth seal 10 is provided at the front end of the shaft sleeve 9. Flanges 11 are fixed to both ends of the labyrinth seal 10 in an integrated manner, and five high-temperature resistant copper sealing teeth 12 are inlaid inside the labyrinth seal 10;

[0030] The specific operation is as follows: the casing 3 and the front air inlet of the present application are made of 304 stainless steel, a support tube is added inside the casing 3 to strengthen the rigidity, the fan bracket 2 is raised to the same plane as the bearing bracket 5, and the stability is improved by reducing the center height. When installing, the anchor bolt hole on any one of the legs is selected as the positioning hole, and the anchor bolt holes on the other three legs are opened along the expansion direction and expansion amount of the positioning hole. Waist-round holes are effectively avoided to prevent the change of the matching clearance between parts caused by high-temperature expansion, causing mechanical damage. In addition, the impeller body 4 is made of FV5 The 20B bullet-shaped nut is fixed to the output end of the main shaft 6, which not only ensures the smoothness of the airflow, but also protects the main shaft 6 from corrosion. The rear disc of the impeller body 4 is welded to the shaft sleeve 9 and welded with a reinforcing plate and a triangular rib plate. The middle part of the impeller body 4 is designed with a reinforcing ring, and the outer circle of the front disc is designed with a reinforcing ring. The structural design can effectively strengthen the rigidity of the impeller body 4 to reduce the deformation amount, and ensure the strength of the impeller body 4 running at high temperatures. All parts of the impeller body 4 are made of the same material and all adopt a welded structure, with consistent overall deformation, good high temperature resistance, and stable and reliable structure.

[0031] See also Figure 6A water cooling mechanism 13 is fixed in the middle of the shaft sleeve 9, and the water cooling mechanism 13 includes a water cooler 1301 and a sealing ring 1302. The water cooler 1301 is bolted to the rear end flange 11 of the labyrinth seal 10, and the water cooler 1301 is a cylindrical structure, and the water cooler 1301 is screwed to the middle of the shaft sleeve 9 through the sealing ring 1302. The water cooling mechanism 13 also includes a water outlet 1303, a water inlet 1304, an arc plate 1305 and a through hole 1306. The water cooler 1301 is provided with a water outlet 1303 at the bottom, and a water inlet 1304 is provided at the top of the water cooler 1301. An arc plate 1305 with a concave surface facing upward is fixed on the top of the water cooler 1301, and the arc plate 1305 seals the water cooler 1301. The water cooling mechanism 13 is divided into an upper cavity and a lower cavity, and an arc plate 1305 is arranged in parallel above the shaft sleeve 9, a plurality of through holes 1306 are provided at the bottom of the arc plate 1305, and the coolant in the upper cavity of the arc plate 1305 flows into the lower cavity along the shaft sleeve 9 through the through holes 1306 and takes away the heat on the shaft sleeve 9, the water cooling mechanism 13 also includes a heat exchange coil 1307, a connecting elbow 1308 and a water inlet interface 1309, the rear side plate of the water cooler 1301 away from the labyrinth seal 10 is fixed with a heat exchange coil 1307, and the outlet end of the heat exchange coil 1307 is connected to the water inlet 1304 at the top of the water cooler 1301 through the connecting elbow 1308, and the inlet end of the heat exchange coil 1307 is provided with a water inlet interface 1309;

[0032] The specific operation is as follows: the shaft end cooling device of the present application is composed of three structural units. The first structural unit is a labyrinth seal 10, whose front end flange 11 is fixed to the rear side plate of the casing 3 by bolts, and the rear end flange 11 is fastened to the water cooler 1301 by bolts. Five high-temperature resistant copper sealing teeth 12 are embedded in the labyrinth seal 10. After the high-temperature gas medium leaks out from the shaft hole of the casing 3 and enters the labyrinth, the amount of hot gas decreases layer by layer. The second structural unit is the water cooler 1301, which is connected to the water cooler 1301 by the sealing ring 1302. The water cooler 1301 is fixed with screws in the middle of the shaft sleeve 9. The inside of the water cooler 1301 cylinder is divided into an upper cavity and a lower cavity by an arc plate 1305. The sealing ring 1302 is designed to be located on both sides of the arc plate 1305 to ensure that water does not leak out. The upper part of the water cooler 1301 is designed with exhaust holes for steam discharge. The third structural unit is a trapezoidal fin 8, which is directly fixed on the main shaft 6. The high-speed rotation of the main shaft 6 dissipates heat to the surrounding air to reduce the contact with the bearing bracket 5 and protect the bearing from high temperature.

[0033] See also Figures 7 and 8A gantry 14 fixed to the base 1 is provided on one side of the input end of the main shaft 6, and a motor 15 is bolted to the outer side of the gantry 14, a driving cone wheel 16 is fixedly connected to the output end of the motor 15, and one side of the driving cone wheel 16 is rotated and transmitted with the main shaft 6 through the main umbrella wheel 7, and the other side of the driving cone wheel 16 is connected to the circulation component 17, the circulation component 17 includes a sleeve 1701, a drain pipe 1702 and a return pipe 1703, the top of the rear end of the sleeve 1701 is connected to the drain pipe 1702 through a one-way valve, and the end of the drain pipe 1702 is connected to the water inlet interface 1309 at the inlet end of the heat exchange coil 1307, the bottom of the rear end of the sleeve 1701 is connected to the return pipe 1703 through a one-way valve, and the end of the return pipe 1703 is connected to the water outlet 1303 at the bottom of the water cooler 1301, and the circulation component 17 also includes a connecting plate 1704, a rotating rod 1705 and Auxiliary umbrella wheel 1706, the outside of sleeve 1701 is welded and fixed to gantry 14 through connecting plate 1704, and a rotating rod 1705 is rotatably installed at the front end of sleeve 1701, the input end of rotating rod 1705 is coaxially provided with auxiliary umbrella wheel 1706, and auxiliary umbrella wheel 1706 is meshed with the other side of driving cone wheel 16 for transmission, circulation component 17 also includes cooling fan 1707, cam column 1708, sleeve 1709 and piston 1710, the front end of rotating rod 1705 is coaxially connected with cooling fan 1707, and cooling fan 1707 is matched with the trapezoidal heat dissipation surface of trapezoidal fin 8, the output end of rotating rod 1705 is coaxially provided with cam column 1708, and the cam groove on the surface of cam column 1708 is slidably matched with sleeve 1709, sleeve 1709 and piston 1710 are fixed in one piece, and piston 1710 is tightly matched with the inner wall of sleeve 1701 through circumferential sealing ring;

[0034] The specific operation is as follows: the output end of the motor 15 drives the cone wheel 16 to rotate and transmit to the main shaft 6 through meshing with the main umbrella wheel 7, thereby driving the impeller body 4 to rotate at high speed to realize the transportation of flue gas; on the other hand, the cone wheel 16 is driven to rotate and transmit to the rotating rod 1705 through meshing with the auxiliary umbrella wheel 1706. The cooling fan 1707 coaxial with the front end of the rotating rod 1705 cooperates with the trapezoidal heat dissipation surface of the trapezoidal fin 8 to realize auxiliary heat dissipation, and the design of the trapezoidal heat dissipation fin can effectively increase the contact area with the airflow and thus improve the heat dissipation efficiency. At the same time, the cam column 1708 coaxial with the output end of the rotating rod 1705, the cam groove on its surface slides with the sleeve 1709, and the rotational motion of the cam column 1708 is converted into the reciprocating motion of the piston 1710. The cooling water is pumped to the heat exchange coil 1307 through the drain pipe 1702 controlled by the one-way valve. When the cooling water is led from the water inlet interface 1309 to the connecting elbow 1308 is further passed into the spiral stroke of the water cooler, and the cooling water in the copper heat exchange coil 1307 is cooled by heat exchange with the high-speed airflow output by the cooling fan 1707, so that the cooling water enters the upper cavity of the water cooler 1301 from the upper water inlet 1304. Since a number of small through holes 1306 are opened at the bottom of the arc plate 1305, the cooling water will continue to flow downward and pour onto the shaft sleeve 9 to take away the heat. After the warm water flows into the lower cavity along the shaft sleeve 9, it flows out from the lower water outlet 1303 of the water cooler 1301, and then returns to the sleeve 1701 through the reflux pipe 1703 connected to the bottom water outlet 1303 of the water cooler 1301 to enter the next cycle, so that the present application only needs to set up one motor 15. While supplying energy to the high-temperature fan, the automatic circulation of the cooling water is realized by the linkage drive of the circulation component 17, and the cooling fan 1707 is used to cool the cooling water in the circulation by heat exchange.

[0035] In summary, when using the high-temperature fan of the granulation drying hot air furnace, the casing 3 and the front air inlet of the present application are made of 304 stainless steel, a support tube is added inside the casing 3 to enhance rigidity, the fan bracket 2 is raised to the same plane as the bearing bracket 5, and the stability is improved by reducing the center height. During installation, the anchor bolt hole on any one of the legs is selected as the positioning hole, and the anchor bolt holes on the other three legs are opened along the expansion direction and expansion amount of the positioning hole. Waist-round holes are opened to effectively avoid changes in the fitting clearance between components caused by high-temperature expansion, causing mechanical damage. In addition, the impeller body 4 is fixed to the output end of the main shaft 6 by a bullet-shaped nut made of FV520B, which not only ensures the smoothness of the airflow, but also protects the main shaft 6 from corrosion. The impeller body 4 is The disk is welded on the shaft sleeve 9 and welded with a reinforcement plate and a triangular rib plate, and a reinforcement ring is designed in the middle of the impeller body 4 and a reinforcement ring is designed on the outer circle of the front disk. The structural design can effectively strengthen the rigidity of the impeller body 4 to reduce the deformation, and ensure the strength of the impeller body 4 running at high temperatures. All parts of the impeller body 4 are made of the same material and all adopt a welded structure. The overall deformation is consistent, the high temperature resistance is good, and the structure is stable and reliable. The shaft end cooling device of the present application is composed of three structural units. The first structural unit is a labyrinth seal 10, and its front end flange 11 is fixed to the rear side plate of the casing 3 by bolts, and the rear end flange 11 is fastened to the water cooler 1301 by bolts. Five high-temperature resistant copper sealing teeth 12 are inlaid in the labyrinth seal 10, and the high-temperature gas medium After leaking out from the shaft hole of the casing 3 and entering the labyrinth, the amount of hot gas decreases layer by layer. The second structural unit is a water cooler 1301, which is fixed to the middle screw of the sleeve 9 by a sealing ring 1302. The inside of the cylinder of the water cooler 1301 is divided into an upper cavity and a lower cavity by an arc plate 1305, wherein the position of the sealing ring 1302 is designed on both sides of the arc plate 1305 to ensure that water will not leak out, and an exhaust hole is designed on the upper part of the water cooler 1301 for easy discharge of steam. The third structural unit is a trapezoidal fin 8, which is directly fixed on the main shaft 6. The high-speed rotation of the main shaft 6 dissipates heat to the surrounding air to reduce the contact with the bearing bracket 5 and protect the bearing from high temperature. When in use, the output end of the motor 15 drives the cone wheel 16 on the one hand through The main shaft 6 is rotated and transmitted through meshing with the main umbrella wheel 7, thereby driving the impeller body 4 to rotate at high speed to transport the flue gas. On the other hand, the cone wheel 16 is driven to rotate and transmit to the rotating rod 1705 through meshing with the auxiliary umbrella wheel 1706. The cooling fan 1707 coaxial with the front end of the rotating rod 1705 cooperates with the trapezoidal heat dissipation surface of the trapezoidal fin 8 to achieve auxiliary heat dissipation, and the design of the trapezoidal heat dissipation fin can effectively increase the contact area with the airflow and thus improve the heat dissipation efficiency. At the same time, the cam column 1708 coaxial with the output end of the rotating rod 1705, the cam groove on its surface is slidably matched with the sliding sleeve 1709, and the rotational motion of the cam column 1708 is converted into the reciprocating motion of the piston 1710, and the cooling water is pumped to the heat exchange coil 1307 through the drain pipe 1702 controlled by the one-way valve.During the spiral stroke of cooling water from the water inlet interface 1309 to the connecting elbow 1308 and further into the water cooler, the cooling water in the copper heat exchange coil 1307 is cooled by heat exchange with the high-speed airflow output by the cooling fan 1707, so that the cooling water enters the upper cavity of the water cooler 1301 from the upper water inlet 1304. Since a number of small through holes 1306 are opened at the bottom of the arc plate 1305, the cooling water will continue to flow downward and pour onto the shaft sleeve 9 to take away the heat. After the warm water flows into the lower cavity along the shaft sleeve 9, it flows out from the lower water outlet 1303 of the water cooler 1301, and then flows out from the bottom water outlet 1301 of the water cooler 1301. The return pipe 1703 connected to 1303 returns to the sleeve 1701 to enter the next cycle, so that the present application only needs one motor 15 to provide energy for the high-temperature fan, and realizes the automatic circulation of cooling water by driving the circulation component 17 in conjunction with the cooling fan 1707 to exchange heat and cool the circulating cooling water. Since there is no need to use a compressor for refrigeration and a water pump for circulation, efficient circulation cooling of cooling water can be achieved with a simplified structure and extremely low cost, solving the wear problem between the various parts of the fan caused by high-temperature expansion, and effectively controlling the heat transmitted from the high-temperature medium to the bearing.

[0036] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various implementations with various modifications suitable for specific uses.

Claims

1. A high-temperature blower for a granulation and drying hot air furnace, comprising a base (1), characterized in that: A bearing bracket (5) is fixed at the rear end of the base (1), and a main shaft (6) is rotatably mounted in the middle of the bearing bracket (5); a main bevel wheel (7) is coaxially mounted at the input end of the main shaft (6), and a trapezoidal fin (8) is fixed at the rear end of the main shaft (6) near the main bevel wheel (7); a shaft sleeve (9) is sleeved on the outside of the main shaft (6), and a labyrinth seal (10) is arranged at the front end of the shaft sleeve (9); flanges (11) are integrally fixed at both ends of the labyrinth seal (10), and five high-temperature resistant copper sealing teeth (12) are inlaid inside the labyrinth seal (10).

2. A high temperature blower for a granulation and drying hot air furnace according to claim 1, characterized in that: A fan bracket (2) is fixed to the front end of the base (1), and the rear side plate of the fan bracket (2) is bolted to the front end flange (11) of the labyrinth seal (10), and the fan bracket (2) is raised to the same plane as the bearing bracket (5), and the four supporting feet at the root of the fan bracket (2) are used as positioning holes to open waist-shaped holes along the expansion direction and the size of the expansion amount, with the anchor bolt on one of the supporting feet as the positioning hole.

3. A high temperature blower for a granulation drying hot air furnace according to claim 2, characterized in that: A casing (3) is fixed inside the fan bracket (2) at the front and rear ends, and an impeller body (4) is rotatably installed inside the casing (3). The impeller body (4) is fixed to the output end of the main shaft (6) through a bullet-shaped nut made of FV520B, and the rear disc of the impeller body (4) is welded to the shaft sleeve (9) and a reinforcement plate and a triangular rib plate are welded. A reinforcement ring is designed in the middle of the impeller body (4), and a reinforcement ring is designed on the outer circle of the front disc of the impeller body (4).

4. The high temperature blower of the hot air furnace for granulation and drying according to claim 1, characterized in that: A water cooling mechanism (13) is fixed in the middle of the shaft sleeve (9), and the water cooling mechanism (13) comprises a water cooler (1301) and a sealing ring (1302). The water cooler (1301) is bolted to the rear end flange (11) of the labyrinth seal (10), and the water cooler (1301) is a cylindrical structure, and the water cooler (1301) is screwed to the middle of the shaft sleeve (9) via the sealing ring (1302).

5. A high temperature blower for a granulation and drying hot air furnace according to claim 4, characterized in that: The water cooling mechanism (13) further comprises a water outlet (1303), a water inlet (1304), a curved plate (1305) and a through hole (1306); the water outlet (1303) is provided at the bottom of the water cooler (1301), and the water inlet (1304) is provided at the top of the water cooler (1301); a curved plate (1305) with a concave surface facing upward is fixed to the top of the water cooler (1301), and the curved plate (1305) divides the inside of the water cooler (1301) into an upper cavity and a lower cavity; the curved plate (1305) is arranged parallel to the top of the shaft sleeve (9); a plurality of through holes (1306) are provided at the bottom of the curved plate (1305), and the coolant in the upper cavity of the curved plate (1305) flows into the lower cavity along the shaft sleeve (9) through the through holes (1306) and takes away the heat on the shaft sleeve (9).

6. A high temperature blower for a granulation and drying hot air furnace according to claim 5, characterized in that: The water cooling mechanism (13) also includes a heat exchange coil (1307), a connecting elbow (1308) and a water inlet interface (1309); the heat exchange coil (1307) is fixed to the rear side plate of the water cooler (1301) away from the labyrinth seal (10), and the outlet end of the heat exchange coil (1307) is connected to the water inlet (1304) at the top of the water cooler (1301) through the connecting elbow (1308), and the inlet end of the heat exchange coil (1307) is provided with a water inlet interface (1309).

7. The high temperature blower of the hot air furnace for granulation and drying according to claim 1, characterized in that: A gantry (14) fixed to the base (1) is provided on one side of the input end of the main shaft (6), and a motor (15) is bolted to the outside of the gantry (14), and a driving cone wheel (16) is fixedly connected to the output end of the motor (15), and one side of the driving cone wheel (16) is rotated and transmitted with the main shaft (6) through the main bevel wheel (7).

8. The high temperature blower of the hot air furnace for granulation and drying according to claim 7, characterized in that: The other side of the driving cone wheel (16) is drivingly connected to a circulation component (17), wherein the circulation component (17) comprises a sleeve (1701), a drain pipe (1702) and a return pipe (1703); the top of the rear end of the sleeve (1701) is connected to the drain pipe (1702) via a one-way valve, and the end of the drain pipe (1702) is connected to a water inlet interface (1309) at the inlet end of the heat exchange coil (1307); the bottom of the rear end of the sleeve (1701) is connected to the return pipe (1703) via a one-way valve, and the end of the return pipe (1703) is connected to a water outlet (1303) at the bottom of the water cooler (1301).

9. A high temperature blower for a granulation and drying hot air furnace according to claim 8, characterized in that: The circulation assembly (17) further comprises a connecting plate (1704), a rotating rod (1705) and a secondary umbrella wheel (1706); the outside of the sleeve (1701) is welded and fixed to the gantry (14) via the connecting plate (1704); the rotating rod (1705) is rotatably mounted at the front end of the sleeve (1701); the input end of the rotating rod (1705) is coaxially provided with the secondary umbrella wheel (1706), and the secondary umbrella wheel (1706) is meshed with the other side of the driving cone wheel (16) for transmission.

10. A high temperature blower for a granulation and drying hot air furnace according to claim 9, characterized in that: The circulation component (17) also includes a cooling fan (1707), a cam column (1708), a sliding sleeve (1709) and a piston (1710). The front end of the rotating rod (1705) is coaxially connected to the cooling fan (1707), and the cooling fan (1707) cooperates with the trapezoidal heat dissipation surface of the trapezoidal fin (8). The output end of the rotating rod (1705) is coaxially connected to the cam column (1708), and the cam groove on the surface of the cam column (1708) is slidably matched with the sliding sleeve (1709). The sliding sleeve (1709) and the piston (1710) are fixed in one piece, and the piston (1710) is tightly matched with the inner wall of the sleeve (1701) through a circumferential sealing ring.

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