Search

CN-121988713-A - Supersonic gas atomization air cooling equipment and process method for roller centrifugal casting

CN121988713ACN 121988713 ACN121988713 ACN 121988713ACN-121988713-A

Abstract

The invention relates to the technical field of centrifugal casting of rollers, in particular to a centrifugal casting supersonic speed air-atomization air-cooling device and a process method of the centrifugal casting of the rollers, comprising a centrifugal casting closed box, cold type equipment arranged in the centrifugal casting closed box, a driving group capable of driving a storage part to rotate, and supersonic speed air-atomization cooling systems arranged on two sides of the centrifugal casting closed box, wherein the supersonic speed air-atomization cooling systems comprise spray pipes respectively arranged on two sides of the centrifugal casting closed box.

Inventors

  • WANG YIN
  • DU XIAOTONG
  • LI CHANG
  • LIN CHUNCHENG
  • LI NA

Assignees

  • 鞍钢轧辊有限公司

Dates

Publication Date
20260508
Application Date
20260312

Claims (9)

  1. 1. The utility model provides a roller centrifugal casting supersonic speed gas atomization forced air cooling equipment, includes centrifugal casting seal case (1), sets up cold type equipment (28) and can drive the rotatory drive group of storing spare in the inside centrifugal casting seal case (1), its characterized in that still includes: The supersonic gas atomization cooling system is arranged at two sides of the centrifugal casting closed box (1) and comprises spray pipes respectively arranged at two sides of the centrifugal casting closed box (1), a first fan arranged at one end of the spray pipes and a nozzle part arranged at the top of the spray pipes; The multi-degree-of-freedom adjusting system is arranged at two sides of the centrifugal casting closed box (1) and comprises a translation mechanism and a lifting mechanism, wherein the translation mechanism and the lifting mechanism are vertically arranged; And the heat discharging system is arranged at the other two sides of the centrifugal casting closed box (1) and comprises a second fan (22) and a third fan (56).
  2. 2. A roll centrifugal casting supersonic gas atomization air cooling apparatus according to claim 1, characterized in that the nozzle comprises a double-mouth laval nozzle a (10) and a double-mouth laval nozzle b (52), the double-mouth laval nozzle a (10) and the double-mouth laval nozzle b (52) are each composed of a laval nozzle expansion section (36) located inside the centrifugal casting enclosure (1), a laval nozzle throat (37) connected with the laval nozzle expansion section (36) and a laval nozzle contraction section (38) connected with one end of the laval nozzle throat (37), a reinforcement member (16) is arranged between the laval nozzle throat (37) and the laval nozzle contraction section (38), an infrared temperature measuring gun (39) for feeding back casting temperature in real time is installed inside the laval nozzle expansion section (36), the nozzle section is arranged at the top of the laval nozzle throat (37), and the fan comprises: the double-blade fan a (11) and the double-blade fan b (15) are respectively arranged at one ends of the two double-mouth Laval nozzles a (10) and are fixedly connected with the Laval nozzle contraction sections (38); A double-vane fan c (46) and a double-vane fan d (50) are respectively arranged at one ends of two double-mouth Laval nozzles b (52) and fixedly connected with the Laval nozzle contraction section (38).
  3. 3. A centrifugal casting supersonic gas-atomizing air-cooling apparatus for rolls according to claim 2, wherein the nozzle section comprises an atomizing nozzle b (8), an atomizing nozzle a (44), an atomizing nozzle d (53) and an atomizing nozzle c (45) provided at the top of the laval nozzle throat (37), and the atomizing nozzle b (8), the atomizing nozzle a (44), the atomizing nozzle d (53) and the atomizing nozzle c (45) each comprise: an atomizing nozzle connecting pipe (43), which is fixedly connected with the atomizing nozzle connecting pipe (43) penetrating through the top of the Laval nozzle throat part (37); The flow dividing sheet (42), the swirl sheet (41) and the atomizing sheet (40) are sequentially arranged inside the atomizing nozzle connecting pipe (43) from top to bottom.
  4. 4. A roll centrifugal casting supersonic speed aerosoling air cooling device according to claim 1, characterized in that the lifting mechanism comprises an axial moving component a (12) and an axial moving component b (48), the axial moving component a (12) and the axial moving component b (48) respectively comprise a lifting motor fixing frame a (3) and a lifting motor fixing frame b (51) welded on the surface of the centrifugal casting closed box (1), the tops of the lifting motor fixing frame a (3) and the lifting motor fixing frame b (51) are respectively provided with a lifting transmission motor a (2) and a lifting transmission motor b (49), and the axial moving component a (12) and the axial moving component b (48) further comprise: the concentric coupler (4) is arranged at the bottoms of the lifting motor fixing frame a (3) and the lifting motor fixing frame b (51); The lifting screw rods (7) are arranged at two sides of the centrifugal casting closed box (1), the lifting screw rods (7) at two sides are fixedly connected with output shafts of the lifting transmission motor a (2) and the lifting transmission motor b (49) respectively through the concentric couplings (4), and bearing sheets a (5) and bearing sheets b (17) for supporting the lifting screw rods (7) are arranged on the surfaces of two sides of the centrifugal casting closed box (1); the lifting sliding table (9) is in threaded connection with the surface of the lifting screw rod (7), a lifting optical axis (6) is arranged between the bearing sheet a (5) and the bearing sheet b (17), a wire rail sliding block (14) is bolted to the surface of the lifting sliding table (9), and the wire rail sliding block (14) is in sliding connection with the surface of the lifting optical axis (6).
  5. 5. A roll centrifugal casting supersonic gas atomization wind cooler apparatus in accordance with claim 4, wherein the translating mechanism comprises an axial moving assembly a (12) and an axial moving assembly b (48), each of the axial moving assembly a (12) and the axial moving assembly b (48) comprising: The axial motor base (30) is bolted to the surface of the lifting sliding table (9), and a hollow shell is bolted to the surface of the axial motor base (30); the axial transmission motor a (31) is fixedly connected to the surface of the axial motor base (30), and an output shaft of the axial transmission motor a (31) is fixedly connected with an axial lead screw (35); The novel axial motor comprises a guide rail telescopic protection cover a (32), a guide rail telescopic protection cover b (33) and a guide rail telescopic protection cover c (34), wherein the guide rail telescopic protection cover c (34) is in sliding connection with the inner wall of the guide rail telescopic protection cover b (33), the guide rail telescopic protection cover b (33) is in sliding connection with the inner wall of the guide rail telescopic protection cover a (32), and one end of the guide rail telescopic protection cover a (32) is welded with the surface of the axial motor base (30).
  6. 6. The apparatus for centrifugal casting of supersonic gas atomization wind cooling of a roller of claim 5, wherein the first fan comprises: A double-blade fan a (11) and a double-blade fan b (15), wherein a double-blade fan connecting frame a (13) is fixedly connected between the double-blade fan a (11) and the double-blade fan b (15); Double-bladed fan c (46) and double-bladed fan d (50), fixedly connected with double-bladed fan link b (47) between double-bladed fan c (46) and the double-bladed fan d (50), double-bladed fan link a (13) and double-bladed fan link b (47) threaded connection respectively at the surface of both sides axial lead screw (35), double-bladed fan link a (13) and double-bladed fan link b (47)'s surface all with hollow shell's inner wall sliding connection, the one end of the flexible protection casing of both sides guide rail c (34) respectively with double-bladed fan link a (13) and double-bladed fan link b (47) fixed connection.
  7. 7. The apparatus for centrifugal casting of rolls, supersonic gas atomization and air cooling according to claim 1, wherein the heat exhausting system further comprises: the centrifugal casting closed box (1) is characterized by comprising a transverse transmission motor b (19) and a transverse transmission motor a (57), wherein rectangular pieces are welded on the surface of the centrifugal casting closed box (1), the transverse transmission motor b (19) and the transverse transmission motor a (57) are respectively bolted on the surface of one rectangular piece, and a transverse optical axis (21) is arranged on the surface of the rectangular piece; The transverse screw b (18) and the transverse screw a (54) are respectively rotated to penetrate through the rectangular piece, and the transverse screw b (18) and the transverse screw a (54) are respectively fixedly connected with output shafts of a transverse transmission motor b (19) and a transverse transmission motor a (57); The transverse sliding block a (20) and the transverse sliding block b (55) are respectively in threaded connection with the surfaces of the transverse screw rod b (18) and the transverse screw rod a (54), the transverse optical axis (21) penetrates through the transverse sliding block a (20) and the transverse sliding block b (55) in a sliding mode, and the second fan (22) and the third fan (56) are respectively welded at the bottoms of the transverse sliding block a (20) and the transverse sliding block b (55).
  8. 8. The centrifugal casting supersonic gas atomization air cooling apparatus for roller according to claim 1, wherein the driving group comprises: An extension plate (23) welded to the surface of the centrifugal casting closed box (1); The stepping motor (24) is bolted to the top of the extension plate (23), an output shaft of the stepping motor (24) is fixedly connected with a connecting piece (25), one end of the connecting piece (25) is fixedly connected with a cross rod, the cross rod extends to the inside of the centrifugal casting closed box (1), a synchronizing piece a (27) and a synchronizing piece b (29) are arranged between the cross rod and the cold-type equipment (28), and the synchronizing piece a (27) and the synchronizing piece b (29) both comprise a gear fixedly sleeved on the surface of the cross rod and a gear fixedly sleeved on the surface of the cold-type equipment (28), and the gear is meshed with the gear; the support frame (26) is bolted at the bottom of the inner wall of the centrifugal casting closed box (1), and the cross rod rotates to penetrate through the support frame (26).
  9. 9. A roll centrifugal casting supersonic gas atomization air cooling process method based on the device of any one of claims 1-8, characterized by comprising the following steps: S1, starting a stepping motor (24), rotating cold-type equipment (28), starting an axial transmission motor a (31), adjusting the axial positions of a double-blade fan connecting frame a (13) and a double-blade fan connecting frame b (47) through rotation of an axial lead screw (35), starting a lifting transmission motor a (2) and a lifting transmission motor b (49), adjusting the longitudinal heights of an axial moving assembly a (12) and an axial moving assembly b (48), moving a supersonic speed gas atomization cooling system to a working position, and determining the distance between a Laval nozzle expansion section (36) and the cold-type equipment (28); S2, starting a double-blade fan a (11), a double-blade fan b (15), a double-blade fan c (46) and a double-blade fan d (50), wherein the air flow is accelerated for the first time through a Laval nozzle contraction section (38), reaches sonic velocity through a Laval nozzle throat (37), expands and accelerates in a Laval nozzle expansion section (36) to form a supersonic airflow field, and performs forced air cooling on the outer surface of cold equipment (28); s3, in the cooling process, monitoring and feeding back temperature data by an infrared temperature measuring gun (39), when the monitored temperature is reduced to a preset threshold value, injecting an external high-pressure water source into an atomizing nozzle connecting pipe (43) and forming water mist through a flow dividing sheet (42), a cyclone sheet (41) and an atomizing sheet (40), carrying the water mist to the inner wall of a centrifugal casting closed box (1) and the surface of cold equipment (28) by supersonic airflow, and accelerating the heat absorption and cooling effects by utilizing the water mist; S4, starting a transverse transmission motor b (19) and a transverse transmission motor a (57), rotating a transverse lead screw b (18) and a transverse lead screw a (54), respectively driving a second fan (22) and a third fan (56) to move by a transverse sliding block a (20) and a transverse sliding block b (55), enabling the second fan (22) and the third fan (56) to move to a position concentric with a casting, starting the second fan (22) and the third fan (56) to form an oriented flow field of 'forward and backward' so as to strengthen the effect of air circulation and heat exchange in the centrifugal casting closed box (1), and discharging hot air accumulated in the centrifugal casting closed box (1); S5, continuously monitoring and feeding back temperature data of the casting by the infrared temperature measuring gun (39), when the temperature of the casting is reduced to the temperature required by subsequent processing, sequentially closing the supersonic gas atomization cooling system and the heat discharging system, adjusting the multi-degree-of-freedom adjusting system to an initial safe position, and then performing subsequent pouring processing operation.

Description

Supersonic gas atomization air cooling equipment and process method for roller centrifugal casting Technical Field The invention relates to the technical field of centrifugal casting of rollers, in particular to supersonic gas atomization air cooling equipment and a process method for centrifugal casting of rollers. Background The roller is a core consumption part for steel rolling production, and the performance of the roller directly determines the precision, the surface quality and the production efficiency of a rolled product. The centrifugal casting method can realize the compact formation of molten metal by utilizing centrifugal force, can precisely control the compounding of the outer wear-resistant material and the core ductile material, becomes a main flow process for manufacturing the high-end compound roller, and has the remarkable advantages of high material utilization rate, good tissue compactness and the like. The centrifugal casting process flow of the double-layer roller generally comprises core steps of casting pretreatment, centrifugal casting and solidification of outer-layer molten metal, interlayer cooling, core molten metal core filling casting and the like in sequence. The cooling solidification process between the first casting (forming the outer layer) and the second casting (forming the core), namely interlayer cooling, is one of the core process links for determining the final performance and interface quality of the roller. The goal of this stage is to form a metallic outer layer of adequate thickness and strength. During solidification of castings, the grain size is inversely related to the cooling rate, namely, the faster the cooling rate is, the greater the supercooling degree of liquid metal is converted into solid state, the higher the nucleation rate is, and the finer the grains are. If the cooling strength is insufficient or the uniformity is poor, the solidification time of the molten metal can be prolonged, so that alloy elements (such as carbon, chromium, vanadium and the like) can migrate for a sufficient time, and hard phases such as carbide and the like are locally aggregated or segregated. Meanwhile, the slow cooling can promote excessive growth of crystal grains to form a coarse microstructure, so that the hardness, wear resistance and fatigue resistance of the working layer of the roller are obviously reduced. If the cooling is excessive or the cooling rate is not matched, the temperature of the outer layer is too low or huge thermal stress exists, the metallurgical bonding strength between two layers of metals is seriously weakened, the problems of poor interface bonding, concentrated residual stress and the like are caused, and finally the roll is peeled off or cracked early in use. Disclosure of Invention The invention aims to provide a supersonic speed gas atomization air cooling device for centrifugal casting of a roller, which is in seamless connection with gas atomization cooling through supersonic speed air cooling, and simultaneously can dynamically adjust multiple degrees of freedom of a symmetrically arranged supersonic speed gas atomization cooling system, greatly improve cooling efficiency and cooling strength, effectively shorten casting molding cycle by carrying out high-efficiency cooling treatment on centrifugal casting molding process of large-size thick-wall roller castings, and realize real-time dynamic feedback of cooling effect of cold-forming equipment through flexible position adjustment of multiple degrees of freedom of the supersonic speed gas atomization cooling system so as to achieve the aim of optimizing cooling. In order to achieve the aim, the invention provides the technical scheme that the supersonic gas atomization air cooling device for roll centrifugal casting comprises a centrifugal casting closed box, cold type equipment arranged in the centrifugal casting closed box, a driving group capable of driving a storage piece to rotate, and further comprises: The supersonic speed gas atomization cooling system is arranged at two sides of the centrifugal casting closed box and comprises spray pipes respectively arranged at two sides of the centrifugal casting closed box, a first fan arranged at one end of the spray pipes and a nozzle part arranged at the top of the spray pipes; The multi-degree-of-freedom adjusting system is arranged at two sides of the centrifugal casting closed box and comprises a translation mechanism and a lifting mechanism, and the translation mechanism and the lifting mechanism are vertically arranged; The heat discharging system is arranged on the other two sides of the centrifugal casting closed box and comprises a second fan and a third fan. Preferably, the nozzle comprises a double-mouth laval nozzle a and a double-mouth laval nozzle b, wherein the double-mouth laval nozzle a and the double-mouth laval nozzle b are respectively composed of a laval nozzle expansion section positioned in the centrifugal casti