Sand-coated molding equipment for iron mold in wind power main shaft casting production and production method of sand-coated molding equipment

Abstract

The invention relates to sand-coated molding equipment for an iron mold in wind power main shaft casting production and a production method of the sand-coated molding equipment, and belongs to the field of machinery. The equipment comprises a set of movable sand shooting and coating mechanism and two sets of sand-coated molding iron mold drawing mechanisms, the movable sand shooting and coating mechanism is movably arranged on a movable track beam and can accurately move to the position above the sand-coated molding iron mold drawing mechanisms, and the two sets of sand-coated molding iron mold drawing mechanisms are fixed to the lower portions of the two sides of an overall frame structure correspondingly. And the sand-coated molding iron mold drawing mechanism is matched with the movable sand-shooting and sand-coating mechanism, so that an iron mold sand-shooting and sand-coated molding station can be formed. The invention further provides a production method of the sand-lined molding equipment for the iron mold in wind power main shaft casting production, and the production method is convenient to operate. The device is reasonable in structural design, safe, reliable, low in labor intensity, good in sand coating molding quality, high in production efficiency and suitable for casting production of multiple wind power main shafts of iron molds of different shapes and sizes, and the use requirements are met.

Description

Technical Field

[0001] The invention relates to equipment and a production method thereof, in particular to sand-coated molding equipment for iron molds in the casting production of wind turbine main shafts and a production method thereof, and belongs to the field of machinery. Background Art

[0002] Wind power generation technology is a green, environmentally friendly, sustainable new energy technology that is increasingly valued by countries around the world. It is gradually developing from land-based wind power generation to offshore wind power generation, and single generator sets are developing towards large-scale. The main shaft of a wind turbine is connected to the fan hub blades at one end and to the internal power generation speed change device and generator set at the other end. It mainly carries the torque transmission that converts wind energy into rotational kinetic energy and is the main force-bearing component of a wind turbine generator set.

[0003] With the increasing power of a single wind turbine, as well as the requirements for production cost and lightweight of wind turbines, higher requirements are placed on the material and performance of wind turbine main shafts. The traditional forging and casting production methods of main shaft blanks can no longer meet the demand.

[0004] Iron mold sand casting technology is an energy-saving, material-saving, high-quality, efficient and high-quality casting production process. The castings produced by it have good comprehensive mechanical properties and high quality, and are suitable for large-scale production of small and medium-sized castings (generally the weight of castings is: a few kilograms to several hundred kilograms). Wind turbine main shaft castings are heavy (the weight of a single main shaft casting: 15-25 tons) and large in size (length is 4-6 meters, and the diameter of the connecting flange is 2.8-3.5 meters). When iron mold sand casting technology is used to produce wind turbine main shaft castings, the size of the iron mold sand casting is huge. The total height of the iron mold sand casting for casting wind turbine main shaft castings is: 5-8 meters, and the plane projection area is: 5-8 meters. It often requires multiple pieces (4-6 pieces) of iron mold sand castings of different shapes and sizes to be combined and stacked together to form a complete iron mold sand casting. The total weight of the iron mold sand casting after the combination exceeds 100 tons. Traditional single-station and double-station iron mold sand-coating molding devices can hardly meet the sand-coating molding requirements for casting wind turbine main shaft iron molds.

[0005] Therefore, developing a large-scale iron mold sand-coating molding device that can complete the sand-coating molding operation of multiple iron molds of different shapes and sizes for casting wind turbine main shafts has become one of the keys to achieving mass production of iron mold sand-coating castings for wind turbine main shaft castings. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art and to provide a sand-coated molding equipment and a production method for iron molds which has a reasonable structural design, is safe and reliable, has low labor intensity, has good sand-coated molding quality, and has high production efficiency, and is suitable for the casting production of multiple iron molds of different shapes and sizes of wind turbine main shafts.

[0007] The technical solution adopted by the present invention to solve the above-mentioned problem is: the sand-covered molding equipment used for iron molds in the casting production of wind turbine main shafts is used to realize the sand-covered molding operations of multiple wind turbine main shaft iron molds with different shapes and sizes. The equipment includes an operating platform, a crossbeam, two movable track beams and multiple pillars. The multiple movable track beams are all installed on the multiple pillars. The multiple movable track beams are connected by crossbeams to form an overall frame structure. An operating platform is arranged on both sides of the movable track beam, which is characterized in that: it also includes a set of mobile sand shooting and sand covering mechanisms and two sets of sand-covered molding iron mold demolding mechanisms. The mobile sand shooting and sand covering mechanisms are movably arranged on the mobile track beams and can be accurately moved to the top of the sand-covered molding iron mold demolding mechanisms. The two sets of sand-covered molding iron mold demolding mechanisms are respectively fixed below the two sides of the overall frame structure. The sand-covered molding iron mold demolding mechanisms cooperate with the mobile sand shooting and sand covering mechanisms to form an iron mold sand shooting and sand covering molding station. The mobile sand-shooting and sand-covering mechanism comprises a mobile sand-shooting main platform, an air bag, a sand-covering sand-shooting head, a lifting cylinder, a telescopic sand-adding pipe, a sand-adding hopper, a sand-shooting mobile mechanism, a sand-shooting plate pneumatic locking mechanism, a sand-shooting head connecting frame and a sand-shooting plate. A sand-adding hopper and two compressed air air bags are installed on the mobile sand-shooting main platform. The sand-adding hopper is divided into four independent small sand-adding hopper units. A telescopic sand-adding pipe is installed under each small sand-adding hopper unit. The bottom of each telescopic sand-adding pipe is connected to the corresponding sand-covering sand-shooting head; the sand-shooting mobile mechanism It includes two sets of active motor reduction driving wheel type rotating moving mechanisms and two sets of driven wheel type rotating moving mechanisms, which are fixedly installed on both sides of the lower plane of the mobile sand shooting main platform; the lifting cylinder is fixedly installed on the upper plane of the mobile sand shooting main platform, and the piston rod of the lifting cylinder is connected to the sand shooting head connecting frame, so that the sand covering sand shooting head can be lifted and lowered with the lifting and lowering of the lifting cylinder; there are multiple sand covering sand shooting heads, and each sand covering sand shooting head is installed with a certain number of sand shooting plate pneumatic locking mechanisms, and the sand shooting plates are arranged on the lower plane of the sand covering sand shooting head; Each set of sand-coated molding iron mold demolding mechanism includes a main frame, multiple mold plate positioning mechanisms, multiple lifting beams, multiple hydraulic demolding cylinders, multiple iron mold lifting electric cylinders, multiple mold plate clamping mechanisms and multiple guide rods. Multiple mold plate positioning mechanisms are fixed on the main frame, multiple mold plate clamping mechanisms are fixedly installed on the main frame, multiple hydraulic demolding cylinders are evenly arranged on both sides of the main frame, multiple iron mold lifting electric cylinders are evenly arranged on both sides of the main frame, and multiple guide rods are fixed on the lifting beams on both sides.

[0008] Preferably, the present invention also includes a sand covering molding station one, a sand covering molding station two and an intermediate parking station, the sand covering molding iron mold demolding mechanism includes a sand covering molding iron mold demolding mechanism one and a sand covering molding iron mold demolding mechanism two, the sand covering molding iron mold demolding mechanism one and the sand covering molding iron mold demolding mechanism two are respectively located at the sand covering molding station one and the sand covering molding station two, the mobile sand shooting and sand covering mechanism is located at the intermediate parking station, and can be moved left and right to the sand covering molding station one and the sand covering molding station two.

[0009] Preferably, the mobile sand shooting and sand covering mechanism of the present invention is also provided with four guide rods, the bottom flanges of the four guide rods are fixedly mounted on the sand shooting head connecting frame, and the guide rods can move up and down in the guide sleeves installed on the mobile sand shooting main platform as the lifting cylinder rises and falls.

[0010] Preferably, the sand-covered sand-shooting heads of the present invention include sand-shooting head one, sand-shooting head two, sand-shooting head three and sand-shooting head four, and the sand-shooting plates include four small sand-shooting plates.

[0011] Preferably, the lifting cylinder of the present invention is a lifting oil cylinder or a lifting hydraulic cylinder.

[0012] Preferably, the mobile sand-shooting main platform of the present invention is a welded steel structure platform.

[0013] Preferably, the main frame of the present invention is a welded steel structure, and the main frame is fixed on the ground.

[0014] The present invention also provides a production method of sand-coated molding equipment for iron molds in the casting production of wind turbine main shafts, which is characterized by the following specific steps: first, the demoulding push rod and the lifting beam of the hydraulic demoulding cylinder in the sand-coated molding iron mold demoulding mechanism are lowered to the lowest position; the sand-shooting and sand-coated mechanism is moved to the middle parking position; each iron mold of the wind turbine main shaft product is molded together with its corresponding model plate, and two sets of molded models and iron molds are respectively hoisted to the main frame of the sand-coated molding iron mold demoulding mechanism on the sand-coated molding station one and the sand-coated molding station two; the mold plate positioning mechanism is used for positioning, and the plate clamping mechanism is used for clamping. The sand-shooting and sand-covering molding operation is carried out by moving the sand-shooting and sand-covering mechanism on the movable track beam to the upper position of one of the two sand-shooting and sand-covering molding stations on the left and right sides of the equipment, and then the sand-shooting and sand-covering molding operation of the iron mold on the station is started: the lifting cylinder in the sand-shooting and sand-covering mechanism moves down, driving the four sand-shooting heads to move down until the lower plane of the sand-shooting plate and the upper plane of the iron mold are tightly pressed together; the sand-shooting and molding switch is turned on, and the compressed air blows the coated sand into the gap between the model and the iron mold, and the gap is completely filled and compacted with the coated sand; after the sand-shooting and sand-covering process of this sand-covering molding station is completed, The lifting cylinder in the mobile sand shooting and covering mechanism rises to the top, driving the four sand shooting heads to rise, and the lower plane of the sand shooting plate on the sand covering shooting head is completely separated from the upper plane of the iron mold, and the mobile sand shooting and covering mechanism moves away from the sand covering molding station to complete the sand shooting and covering operation of the iron mold on this station; then the sand covering layer on the iron mold on this station begins to solidify, and after the solidification is completed, the hydraulic mold lifting cylinder on the main frame of this station is started, and the hydraulic cylinder mold lifting push rod rises and contacts with the lower plane of the iron mold running edge. Under the strong mold lifting force of the hydraulic mold lifting cylinder, the iron mold rises about 50 mm, so that the iron mold on this station is separated from the model by a certain distance; then the iron mold lifting electric cylinder is turned on to make The iron mold rises, and under the action of the lifting force of the iron mold lifting electric cylinder, the lifting beam is driven to rise, and the upper plane of the lifting beam is in contact with the lower plane of the iron mold running edge, driving the iron mold to rise until the lower plane of the iron mold is higher than the upper plane of the model, and the iron mold is completely separated from the model, and the iron mold is lifted from the sand covering molding station, and then the model plate is also lifted from the sand covering molding station, completing the sand covering molding operation of the iron mold; then the other assembled wind turbine main shaft model plates and iron molds can be lifted to the sand covering molding station for sand covering molding; the sand covering molding operations of the iron molds at the two sand covering molding stations in the equipment are performed alternately to complete the sand covering molding of a group of iron molds required for casting wind turbine main shafts.

[0015] Compared with the prior art, the present invention has the following advantages and effects: 1) The overall structural design is reasonable, safe and reliable, and a mobile sand shooting and sand covering molding device is used to complete the sand shooting and sand covering molding operations of a group of multiple iron molds of different shapes and sizes of the wind turbine main shaft; 2) The iron mold sand covering casting mold of the wind turbine main shaft is produced by the sand covering molding equipment. During the sand shooting and sand covering molding process, the labor intensity is low, the process control is simple, the sand covering molding quality is good, and the production efficiency of the iron mold sand covering casting is high; 3) The investment cost of the sand shooting and sand covering molding equipment is low, the equipment is easy to install, and the maintenance cost is low; 4) The mass production of wind turbine main shaft castings can be realized to meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the wind turbine main shaft casting according to the embodiment of the present invention is shown in FIG. Figure 1 .

[0017] Figure 2 The structure of the wind turbine main shaft casting according to the embodiment of the present invention is shown in FIG. Figure 2 .

[0018] Figure 3 It is a schematic diagram of the iron mold after assembly for casting a wind turbine main shaft according to an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of the sand-shooting and sand-covering molding principle of an iron mold for casting a wind turbine main shaft according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the sand-coated molding equipment for casting the iron mold for the wind turbine main shaft according to an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the main structure of the sand-coated molding equipment for casting the iron mold for the wind turbine main shaft according to an embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of the top view of the structure of the sand-coated molding equipment for casting the iron mold for the wind turbine main shaft according to an embodiment of the present invention.

[0023] Figure 8 It is a side structural schematic diagram of a sand-coated molding equipment for casting an iron mold for a wind turbine main shaft according to an embodiment of the present invention.

[0024] Fig. 9 It is a three-dimensional structural schematic diagram of the mobile sand shooting and sand covering mechanism in the iron-covered sand molding equipment according to an embodiment of the present invention.

[0025] Fig.10 It is a schematic diagram of the main structure of the mobile sand shooting and covering mechanism in the iron-covered sand molding equipment according to an embodiment of the present invention.

[0026] Fig.11 It is a schematic diagram of the top structure of the mobile sand shooting and covering mechanism in the iron-covered sand molding equipment according to an embodiment of the present invention.

[0027] Fig.12 It is a side structural schematic diagram of the mobile sand shooting and covering mechanism in the iron-covered sand molding equipment according to an embodiment of the present invention.

[0028] Fig.13 It is a three-dimensional structural schematic diagram of the unpacking and demoulding mechanism in the iron mold sand-coated molding equipment according to an embodiment of the present invention.

[0029] Fig.14 It is a three-dimensional structural schematic diagram of the unpacking and demoulding mechanism in the iron mold sand-coated molding equipment according to an embodiment of the present invention.

[0030] Fig.15 It is a three-dimensional structural schematic diagram of the unpacking and demoulding mechanism in the iron mold sand-coated molding equipment according to an embodiment of the present invention.

[0031] Fig.16 It is a three-dimensional structural schematic diagram of the unpacking and demoulding mechanism in the iron mold sand-coated molding equipment according to an embodiment of the present invention.

[0032] Fig.17 Schematic diagram of the sand-covered molding production process of the iron mold sand-covered molding equipment according to the embodiment of the present invention Figure 1 .

[0033] Fig.18 Schematic diagram of the sand-covered molding production process of the iron mold sand-covered molding equipment according to the embodiment of the present invention Figure 2 .

[0034] Fig.19 Schematic diagram of the sand-covered molding production process of the iron mold sand-covered molding equipment according to the embodiment of the present invention Figure 3 .

[0035] Fig. 20 Schematic diagram of the sand-covered molding production process of the iron mold sand-covered molding equipment according to the embodiment of the present invention Figure 4 .

[0036] Fig.21 Schematic diagram of the sand-covered molding production process of the iron mold sand-covered molding equipment according to the embodiment of the present invention Figure 5 .

[0037] Fig. 22 Schematic diagram of the sand-covered molding production process of the iron mold sand-covered molding equipment according to the embodiment of the present invention Figure 6 .

[0038] In the figure: a mobile sand-shooting and sand-covering mechanism 1, a sand-covering and molding iron mold demoulding mechanism Z, a sand-covering and molding iron mold demoulding mechanism 1 2, a sand-covering and molding iron mold demoulding mechanism 2 3, an operating platform 4, a movable track beam 5, a support 6, a crossbeam 7, a sand-covering and molding station 1 8, a sand-covering and molding station 2 9, and an intermediate parking station 10; Mobile sand shooting and sand covering mechanism 1: mobile sand shooting main platform 1-1, air bag 1-2, sand covering sand shooting head 1-3, lifting cylinder 1-4, telescopic sand adding pipe 1-5, sand adding bucket 1-6, sand shooting moving mechanism 1-7, sand shooting plate pneumatic locking mechanism 1-8, guide rod 1-9, sand shooting head connecting frame 1-10, sand shooting head one 1-11, sand shooting head two 1-12, sand shooting head three 1-13, sand shooting head four 1-14, sand shooting plate 1-15; Sand-covered iron mold demoulding mechanism Z: main frame 21, hydraulic demoulding cylinder 22, iron mold lifting electric cylinder 23, mold plate positioning mechanism 24, plate clamping mechanism 25, lifting beam 26, guide rod 27; Figure 3 Middle: wind turbine main shaft body iron type 1 101, wind turbine main shaft body iron type 2 102, wind turbine main shaft body iron type 3 103, wind turbine main shaft body iron type 4 104, wind turbine main shaft flange iron type 105; Figure 4 Middle: coated sand 11, sand shooting head 12, sand shooting plate 13, sand shooting hole 14, iron mold 15, model 16, positioning pin 17, positioning pin hole 18.

[0039] Figure 17-Figure 22 Middle: The iron mold is separated from the model H. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0041] Example

[0042] See also Figures 1 to 22 In this embodiment, the sand-coated molding equipment used for the iron mold in the casting production of the wind turbine main shaft includes an operating platform 4, a crossbeam 7, a plurality of movable track beams 5, a plurality of pillars 6, a set of movable sand-shooting and sand-coating mechanisms 1 and two sets of sand-coated molding iron mold demolding mechanisms Z. The two movable track beams 5 are both installed on the plurality of pillars 6. The two movable track beams 5 are connected to the crossbeam 7 through the pillars 6 to form an overall frame structure, which is used for the movable sand-shooting and sand-coating mechanism 1 to move left and right thereon.

[0043] See also Figure 5-Figure 8 As shown, the middle parking station 10 of the mobile sand shooting and sand covering mechanism 1 is located at the bottom of the center of the overall frame, and two sand covering molding iron mold demolding mechanisms Z are fixedly installed at the bottom of both sides of the overall frame, which, combined with the mobile sand shooting and sand covering mechanism 1, can form two iron mold sand shooting and sand covering molding stations.

[0044] An operating platform 4 is also provided on both sides of the movable track beam 5 in this embodiment, for operators to perform sand shooting and sand covering molding operations; the mobile sand shooting and sand covering mechanism 1 can move left and right on the movable track beam 5, and the mobile sand shooting and sand covering mechanism 1 can be accurately moved to the upper side of the sand covering molding iron mold demolding mechanism Z on the left and right sides of the device (sand shooting and sand covering molding station) through the movement of the movable track beam 5 installed on the pillar 6, and perform sand shooting and sand covering molding operations on the iron mold.

[0045] The sand-covered molding iron mold demolding mechanism Z in this embodiment includes a sand-covered molding iron mold demolding mechanism 1 2 and a sand-covered molding iron mold demolding mechanism 2 3. The sand-covered molding iron mold demolding mechanism 1 2 and the sand-covered molding iron mold demolding mechanism 2 3 are respectively located at the sand-covered molding station 1 8 and the sand-covered molding station 2 9. The mobile sand-shooting and sand-covering mechanism 1 is located at the middle parking station 10 and can be moved left and right to the sand-covered molding station 1 8 and the sand-covered molding station 2 9.

[0046] See also Figure 5-Figure 8 As shown, movable track beams 5, operating platforms 4, pillars 6 and cross beams 7 are installed on both sides of the device; the movable track beams 5, operating platforms 4, etc. are installed on six pillars 6 on the ground on both sides of the device, and four cross beams 7 are connected to four of the pillars 6 on both sides, so that the movable track beams 5, operating platforms 4, pillars 6 and cross beams 7 form an integral frame structure.

[0047] The equipment is provided with two sand-coating molding stations (sand-coating molding station 1 8 and sand-coating molding station 2 9) and an intermediate parking station 10. Through a set of mobile sand-shooting and sand-coating mechanism 1, equipped with two sets of sand-coating molding iron mold demoulding mechanisms Z (sand-coating molding iron mold demoulding mechanism 1 2 and sand-coating molding iron mold demoulding mechanism 2 3), the sand-coating molding operation of multiple wind turbine main shaft iron molds of different shapes and sizes can be realized.

[0048] In this embodiment, the sand covering molding station 1 8 and the sand covering molding station 2 9 are distributed on both sides of the device, and are mainly used to complete the sand shooting and sand covering molding of the wind turbine main shaft iron mold casting of the present invention. A sand covering molding iron mold demolding mechanism Z is installed in this station.

[0049] See also Figure 9-12 As shown, in this embodiment, the mobile sand shooting and sand covering mechanism 1 includes a mobile sand shooting main platform 1-1, an air bag 1-2, a sand covering sand shooting head 1-3, a lifting cylinder 1-4, a telescopic sand adding tube 1-5, a sand adding bucket 1-6, a sand shooting moving mechanism 1-7, a sand shooting plate pneumatic locking mechanism 1-8, a guide rod 1-9, a sand shooting head connecting frame 1-10 and a sand shooting plate 1-15.

[0050] In this embodiment, the mobile sand shooting main platform 1-1 is a welded steel structure platform, which is installed to support all the components of the sand covering and sand shooting molding device; a sand adding hopper 1-6 for storing molding sand for sand covering and sand shooting is installed on the mobile sand shooting main platform 1-1, and the sand adding hopper 1-6 is divided into four independent small sand adding hopper units, and a telescopic sand adding pipe 1-5 is fixedly installed under each small sand adding hopper, and the bottom of each telescopic sand adding pipe 1-5 is connected to the corresponding sand covering and sand shooting head 1-3, which is used to transport the coated sand stored in the sand adding hopper 1-6 into the shooting cavity of the sand covering and sand shooting head 1-3; two compressed air bags 1-2 are also fixedly installed on the mobile sand shooting main platform 1-1, which are used to store the compressed air required for each sand covering and sand shooting molding.

[0051] The sand-shooting moving mechanism 1-7 in this embodiment is composed of two groups of active motor-reduced driven wheel-type rotating moving mechanisms and two groups of driven wheel-type rotating moving mechanisms, which are fixedly mounted on both sides of the lower plane of the mobile sand-shooting main platform 1-1. The motor drives the moving wheels to move the platform back and forth along the rotation direction of the moving wheels. The electrical control system can realize precise movement and positioning of the platform.

[0052] The lifting cylinder 1-4 in this embodiment adopts one of a lifting oil cylinder or a lifting hydraulic cylinder; the lifting cylinder 1-4 is fixedly installed at the central position of the upper plane of the mobile sand shooting main platform 1-1, and the piston rod of the lifting cylinder 1-4 is fixed together with the sand shooting head connecting frame 1-10, so that the sand-covered sand shooting head 1-3 can be lifted and lowered with the lifting of the lifting oil cylinder; the bottom flanges of the four guide rods 1-9 are installed on the sand shooting head connecting frame 1-10, and the guide rods 1-9 can move up and down in the guide sleeve installed on the mobile sand shooting main platform 1-1 with the lifting of the lifting cylinder 1-4, and have a good guiding effect on the sand shooting head connecting frame 1-10.

[0053] The sand blasting plate 1-15 in this embodiment is arranged on the sand covering sand blasting head 1-3, and there are multiple sand covering sand blasting heads 1-3. Each sand covering sand blasting head 1-3 is equipped with a certain number of sand blasting plate pneumatic locking mechanisms 1-8, which are used for locking the four sand covering sand blasting heads 1-3 with the corresponding sand blasting plates in the mold tooling during the sand blasting and sand covering molding process; a telescopic sand adding tube 1-5 is also fixedly installed in the middle and upper part of each sand covering sand blasting head 1-3, and the other end of the telescopic sand adding tube 1-5 is fixedly installed in the corresponding position below the sand adding hopper 1-6.

[0054] The sand covering and sand shooting head device of this embodiment is composed of four sand covering and sand shooting head mechanisms with the same structure but independent of each other, which are fixedly installed together under the sand shooting head connection frame 1-10 to form an integral structure.

[0055] The present invention adopts four sand-covered blasting heads 1-3, and replaces an ultra-large blasting plate with four relatively small blasting plates and four smaller sand-covered blasting plates, which can greatly reduce the production cost of the blasting plate tooling and is beneficial to improving the molding quality during sand blasting and sand-covered molding.

[0056] The sand-covered sand-shooting heads 1-3 include a sand-shooting head 1-11, a sand-shooting head 2 1-12, a sand-shooting head 3 1-13 and a sand-shooting head 4 1-14, and the sand-shooting plates 1-15 include four small sand-shooting plates.

[0057] See also Figure 13-Figure 16 As shown, each set of sand-coated molding iron mold demolding mechanism Z includes a main frame 21, multiple mold plate positioning mechanisms 24, multiple lifting beams 26, four hydraulic demolding cylinders 22, four iron mold lifting electric cylinders 23, eight plate clamping mechanisms 25 and four guide rods 27.

[0058] The main frame 21 in this embodiment is a welded steel structure, which carries all the parts and components in the mechanism, and the main frame 21 is installed on the ground; the positioning pins in the mold plate positioning mechanism 24 are installed on the main frame 21, and are used for positioning between the mold plate and the main frame 21 when the mold plate and the iron mold are placed on the main frame 21.

[0059] The eight template clamping mechanisms 25 in this embodiment are installed on the main frame 21. Through the left and right movement of the clamping cylinder, they cooperate with the corresponding structure on the template base, so that the template base and the main frame 21 are tightly fixed together during the iron mold sand shooting and sand covering molding process.

[0060] The four hydraulic demolding cylinders 22 in this embodiment are fixedly mounted on both sides of the main frame 21 in pairs, with a demolding stroke of 30-50 mm and a total demolding force greater than 300 tons. The hydraulic cylinder demolding push rod passes through the lifting beam 26 and is used to separate the iron mold from the model after the sand casting is solidified.

[0061] The four iron mold lifting electric cylinders 23 in this embodiment are fixedly installed on both sides of the main frame 21 in pairs, and the two lifting jack heads on each side are fixedly connected to the lifting beam 26 on the same side. The lifting stroke is 1000-1400 mm, and the total lifting force is greater than 50 tons. The iron mold lifting electric cylinders 23 are lifted upward to drive the lifting beam 26 to rise, so that the casting iron mold rises to the lower plane of the iron mold higher than the upper plane of the model, so that the two are completely separated.

[0062] The four guide rods 27 in this embodiment are fixedly mounted on the lifting beams 26 on both sides in pairs, and play a guiding role for the lifting beams 26 during the lifting process.

[0063] See also Figure 4As shown, it is a schematic diagram of the sand shooting and sand coating molding principle of the iron mold for casting a wind turbine main shaft, including coated sand 11, a sand shooting head 12, a sand shooting plate 13, sand shooting holes 14, an iron mold 15, a model 16, a positioning pin 17 and a positioning pin hole 18. The iron mold 15 and the model 16 are molded together by the positioning pin 17 and the positioning pin hole 18 at the iron mold 15. The coated sand 11 in the sand shooting head 12 is shot into the gap between the iron mold 15 and the model 16 through the sand shooting holes 14 on the sand shooting plate 13 to form a sand coating layer.

[0064] The specific principle of sand-coating molding is as follows: the weight of wind turbine main shaft casting is generally 15-25 tons, and its product size is: the length is generally 4-6 meters, the connection flange diameter is 2.8-3.5 meters, and the main shaft neck outer diameter is between 1.5-2.0 meters. It is a large ductile iron casting. Therefore, the height of each iron mold of the sand-coated outer cylindrical casting of each wind turbine main shaft casting is generally controlled at about 1 meter according to the size of the wind power product. The largest projection diameter of the wind turbine main shaft iron mold is about 5-6 meters, and the weight of the largest connection flange iron mold generally exceeds 35 tons.

[0065] There are great differences between the sand-shooting and sand-covering device for large iron molds of wind turbine main shafts of 4-6 different shapes and weights and the existing iron mold sand-covering molding device used for traditional mass production. The main differences are: 1) One sand-shooting and sand-covering device is used to successively realize the sand-covering molding of 4-6 iron molds of wind turbine main shaft castings of different shapes and sizes; 2) The production efficiency of large iron molds of wind turbine main shaft iron molds of sand-shooting and sand-covering can be lower than the high efficiency of large batches of small and medium-sized castings, and a group of wind turbine main shaft casting iron molds of sand-shooting and sand-covering can often be completed within 2 hours (that is, all iron mold castings required for a wind turbine main shaft casting); 3) The structure of the sand-shooting and sand-covering device for wind turbine main shaft iron molds can realize the use of sand-shooting mold tooling with lower investment capital for sand-covering molding of iron molds as much as possible; 4) A lower production cost of the sand-shooting and sand-covering device is achieved.

[0066] Therefore, the sand shooting and covering molding operations of the iron mold at the two stations are realized by adopting a mobile sand shooting and covering mechanism 1 to move back and forth to two sand shooting and covering molding stations (sand covering molding station one 8, sand covering molding station two 9); the mobile sand shooting and covering mechanism 1 uses four evenly distributed shooting heads to perform sand shooting and covering molding of the iron mold of the wind turbine main shaft, and divides the entire sand shooting and covering sand shooting plate with a large projection area into four, so that a sand shooting plate with a large projection area becomes four sand shooting plates with smaller projection areas, which greatly saves the production cost of the sand shooting plate; the corresponding model and iron mold are assembled and hoisted into the iron mold sand shooting and covering molding station of the device through crane hoisting, and the sand shooting and covering molding operations of the iron mold are carried out; by setting two sand shooting and covering molding stations and operating them alternately, the higher production efficiency of iron mold sand shooting and covering molding of the device can be achieved.

[0067] In the production of iron mold covered sand casting wind turbine main shaft castings, the outer cylindrical casting cavity of the wind turbine main shaft is formed by an iron mold covered with sand casting, that is: the outer cylindrical cavity of the wind turbine main shaft adopts multiple iron molds of different shapes and sizes (generally 4-6 pieces along the length direction of the main wind turbine main shaft axis, of which multiple pieces are straight-through wind turbine main shaft outer cylindrical castings, and 1 piece is a connecting flange through-type casting), that is: a wind turbine main shaft shaft body iron mold 101, a wind turbine main shaft shaft body iron mold 2 102, a wind turbine main shaft shaft body iron mold 3 103, a wind turbine main shaft shaft body iron mold 4 104, and a wind turbine main shaft flange iron mold 105 are set, such as Figure 3 By covering the surface of each iron mold cavity with a layer of coated sand, solidifying and demolding, and then stacking the corresponding iron mold coated sand casting molds of the outer circular cavity of the wind turbine main shaft in sequence, a complete iron mold coated sand casting mold of the outer circular cavity of the wind turbine main shaft is formed.

[0068] The sand-covered iron mold for wind turbine main shaft casting still adopts the sand-covered sand-covered molding method, that is, the molding principle of the sand-covered iron mold of the outer cylindrical cavity of each wind turbine main shaft casting is as follows: Figure 4 As shown, after each casting iron mold 15 is molded with the corresponding model 16, the coated sand 11 is injected into the gap between the iron mold 15 and the model 16 by compressed air to form a layer of coated sand layer, which is then solidified and molded to complete the sand-coated molding of the wind turbine main shaft iron mold.

[0069] See also Figure 17-Figure 22As shown, the specific steps of the production process of the sand-coated molding equipment used for the iron mold in the casting production of the wind turbine main shaft in this embodiment are as follows: first, the demolding push rod, the lifting beam 26, etc. of the hydraulic demolding cylinder 22 in the sand-coated molding iron mold demolding mechanism Z are all lowered to the lowest position; the mobile sand shooting and sand-coating mechanism 1 is in the middle parking station 10; the various iron molds of the wind turbine main shaft product and their corresponding model plates are combined together (4-6 groups of iron molds and models), and two groups of completed models and iron molds are hoisted to the sand-coated molding iron mold demolding mechanism Z main frame 21 on the sand-coated molding station 1 8 and the sand-coated molding station 2 9 respectively; the mold plate is positioned by the mold plate positioning mechanism 24, the mold plate clamping mechanism 25 is clamped, and other process actions. 21 are tightly fixed together; then the mobile sand shooting and sand covering mechanism 1 on the mobile track beam 5 can be moved to the accurate position above one of the two sand shooting and sand covering molding stations on the left and right sides of the equipment and stop, and start the sand shooting and sand covering molding operation on the iron mold on the station: the lifting cylinder 1-4 in the mobile sand shooting and sand covering mechanism 1 descends, driving the four sand shooting heads to descend until the lower plane of the sand shooting plate 1-15 is tightly fitted and pressed against the upper plane of the iron mold; turn on the sand shooting and molding switch, and the compressed air blows the coated sand into the gap between the model and the iron mold, and the gap is completely filled and compacted with the coated sand; after the sand shooting and sand covering process of this sand covering molding station is completed, the lifting cylinder 1-4 in the mobile sand shooting and sand covering mechanism 1 rises to the top, driving the four sand shooting heads to move upward, and the sand shooting heads are moved ... The sand-covering and sand-covering mechanism 1 moves away from the sand-covering and molding station (the sand-covering and sand-covering mechanism 1 can be moved to the middle parking station 10 to stop, or moved to another sand-covering and molding station equipped with the present invention to stop, and the model and the iron mold placed on the other station are subjected to the same sand-covering and molding operation as described above), completing the sand-covering and sand-covering operation of the iron mold on the station; then the sand-covering layer on the iron mold on the station begins to solidify, and after the solidification is completed, the hydraulic ejection cylinder 22 on the main frame 21 of the station is started, and the ejection push rod of the hydraulic cylinder rises and contacts the lower plane of the running edge of the iron mold, and the powerful ejection force of the hydraulic ejection cylinder 22 (a total ejection force of 300 tons) acts The iron mold rises about 50 mm, so that the iron mold on the station is separated from the model by a certain distance; then the iron mold lifting electric cylinder 23 is turned on to make it rise, and under the action of the lifting force of the iron mold lifting electric cylinder 23 (a total of 50 tons), the lifting beam 26 is driven to rise, and the upper plane of the lifting beam 26 contacts the lower plane of the iron mold running edge, driving the iron mold to rise until the lower plane of the iron mold is higher than the upper plane of the model (rising 1000-1400mm according to the height of the iron mold), the iron mold is completely separated from the model, and the iron mold is lifted from the sand-covered molding station, and then the model plate is also lifted from the sand-covered molding station, completing the sand-covered molding operation of the iron mold; then other wind turbine main shaft model plates and iron molds that have been assembled can be lifted to the sand-covered molding station for sand-covered molding;By alternately performing the sand-coating molding operations of the iron molds at the two sand-coating molding stations in the equipment, the sand-coating molding of a set of iron molds (4-6 pieces) required for casting a wind turbine main shaft can be completed. ;

[0070] See also Fig.17 Shown: is the starting state of the working process; see Fig.18 As shown: the sand covering station 1 is hoisting and fixing the mold plate 1 and the iron mold 1 after the mold is closed, and the sand covering station 2 is hoisting the mold plate 2 and the iron mold 2 after the mold is closed.

[0071] See also Fig.19 As shown: the sand covering station 1 performs sand shooting and sand covering shaping of the iron mold 1.

[0072] See also Fig. 20 As shown: sand covering station 1 performs demoulding operation on iron mold 1 (demolding of iron mold 1 is set to three steps, the iron mold and the model are separated by H of 50mm in the first step, and the iron mold and the model are separated by H of 1440mm in the second step), and sand covering station 2 performs sand shooting and sand covering molding of iron mold 2.

[0073] See also Fig.21 As shown, the sand covering station 1 has hoisted and fixed the mold plate 3 and the iron mold 3 after mold closing, and the sand covering station 2 is performing the demolding operation of the iron mold 2 (the demolding of the iron mold 2 is set to three steps, the separation H of the iron mold and the model in the first step is 50mm, and the separation H of the iron mold and the model in the second step is 1400mm).

[0074] See also Fig. 22 As shown: the sand covering station 1 has hoisted and fixed the mold plate 3 and the iron mold 3 after mold closing, and the sand covering station 2 is hoisting the mold plate 2 away from the station.

[0075] Through the above description, those skilled in the art can already implement it.

[0076] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field to which the present invention belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A sand-coated molding equipment for iron molds in the casting production of wind turbine main shafts, used for realizing the sand-coated molding operation of a plurality of wind turbine main shaft iron molds of different shapes and sizes, the equipment comprising an operating platform (4), a crossbeam (7), two movable track beams (5) and a plurality of pillars (6), the two movable track beams (5) are both installed on the plurality of pillars (6), the two movable track beams (5) are connected to the crossbeam (7) through the pillars (6) to form an integral frame structure, the operating platform (4) is arranged on both sides of the movable track beam (5), and the equipment is characterized in that: It also comprises a set of mobile sand-shooting and sand-covering mechanisms (1) and two sets of sand-covering and molding iron mold demoulding mechanisms (Z), wherein the mobile sand-shooting and sand-covering mechanisms (1) are movably arranged on the mobile track beam (5) and can be accurately moved to the top of the sand-covering and molding iron mold demoulding mechanisms (Z), and the two sets of sand-covering and molding iron mold demoulding mechanisms (Z) are respectively fixedly installed below the two sides of the overall frame structure, and the sand-covering and molding iron mold demoulding mechanisms (Z) cooperate with the mobile sand-shooting and sand-covering mechanisms (1) to form an iron mold sand-shooting and sand-covering molding station; The mobile sand shooting and covering sand mechanism (1) comprises a mobile sand shooting main platform (1-1), an air bag (1-2), a covering sand shooting head (1-3), a lifting cylinder (1-4), a telescopic sand adding pipe (1-5), a sand adding bucket (1-6), a sand shooting moving mechanism (1-7), a sand shooting plate pneumatic locking mechanism (1-8), a sand shooting head connecting frame (1-10) and a sand shooting plate (1-15). The mobile sand shooting main platform (1-1) is equipped with a sand adding bucket (1-6) and two compressed air air bags (1-2). The sand adding bucket (1-6) is divided into four independent small sand adding bucket units. A telescopic sand adding pipe (1-5) is installed under each small sand adding bucket unit. The bottom of each telescopic sand adding pipe (1-5) is connected to the corresponding covering sand shooting head (1-15). 1-3); the sand-shooting moving mechanism (1-7) comprises two groups of active motor-reduced driving wheel-type rotating moving mechanisms and two groups of driven wheel-type rotating moving mechanisms, which are fixedly mounted on both sides of the lower plane of the mobile sand-shooting main platform (1-1); the lifting cylinder (1-4) is fixedly mounted on the upper plane of the mobile sand-shooting main platform (1-1), and the piston rod of the lifting cylinder (1-4) is connected to the sand-shooting head connecting frame (1-10), so that the sand-covering sand-shooting head (1-3) can be raised and lowered along with the lifting and lowering of the lifting cylinder; there are a plurality of sand-covering sand-shooting heads (1-3), and each sand-covering sand-shooting head (1-3) is installed with a certain number of sand-covering plate pneumatic locking mechanisms (1-8), and the sand-shooting plates (1-15) are arranged on the lower plane of the sand-covering sand-shooting heads (1-3); Each set of sand-covered molding iron mold stripping mechanism (Z) comprises a main frame (21), a plurality of mold plate positioning mechanisms (24), a plurality of lifting beams (26), a plurality of hydraulic stripping cylinders (22), a plurality of iron mold lifting electric cylinders (23), a plurality of mold plate clamping mechanisms (25) and a plurality of guide rods (27). The plurality of mold plate positioning mechanisms (24) are fixed on the main frame (21), the plurality of mold plate clamping mechanisms (25) are installed on the main frame (21), the plurality of hydraulic stripping cylinders (22) are evenly arranged on both sides of the main frame (21), the plurality of iron mold lifting electric cylinders (23) are evenly arranged and fixedly installed on both sides of the main frame (21), and the plurality of guide rods (27) are fixedly installed on the lifting beams (26) on both sides.

2. The sand-coated molding equipment for iron molds in the production of wind turbine main shaft casting according to claim 1 is characterized in that: The invention also comprises a first sand-covered molding station (8), a second sand-covered molding station (9) and an intermediate parking station (10); the sand-covered molding iron mold demoulding mechanism (Z) comprises a first sand-covered molding iron mold demoulding mechanism (2) and a second sand-covered molding iron mold demoulding mechanism (3); the first sand-covered molding iron mold demoulding mechanism (2) and the second sand-covered molding iron mold demoulding mechanism (3) are respectively located at the first sand-covered molding station (8) and the second sand-covered molding station (9); the movable sand-shooting and sand-covering mechanism (1) is located at the intermediate parking station (10) and can be moved left and right to the first sand-covered molding station (8) and the second sand-covered molding station (9).

3. The sand-coated molding equipment for iron molds in the production of wind turbine main shaft casting according to claim 1 is characterized in that: The mobile sand-shooting and sand-covering mechanism (1) is further provided with four guide rods (1-9), the bottom flanges of the four guide rods (1-9) being mounted on the sand-shooting head connection frame (1-10), and the guide rods (1-9) being able to move up and down in guide sleeves mounted on the mobile sand-shooting main platform (1-1) as the lifting cylinder (1-4) is raised and lowered.

4. The sand-coated molding equipment for iron molds in the production of wind turbine main shaft casting according to claim 1 is characterized in that: The sand-covered sand-shooting heads (1-3) include a sand-shooting head one (1-11), a sand-shooting head two (1-12), a sand-shooting head three (1-13) and a sand-shooting head four (1-14), and the sand-shooting plates (1-15) include four small sand-shooting plates.

5. The sand-coated molding equipment for iron molds in the production of wind turbine main shaft casting according to claim 1 is characterized in that: The lifting cylinder (1-4) is a lifting oil cylinder or a lifting hydraulic cylinder.

6. The sand-coated molding equipment for iron molds in the production of wind turbine main shaft casting according to claim 1 is characterized in that: The mobile sand-shooting main platform (1-1) is a welded steel structure platform.

7. The sand-coated molding equipment for iron molds in the production of wind turbine main shaft casting according to claim 1 is characterized by: The main frame (21) is a welded steel structure, and the main frame (21) is fixed on the ground.

8. A method for producing sand-coated iron mold molding equipment in the production of wind turbine main shaft casting, using the sand-coated iron mold molding equipment in the production of wind turbine main shaft casting as claimed in any one of claims 1 to 7, characterized in that: The specific steps are as follows: First, the ejector rod and the lifting beam (26) of the hydraulic ejector cylinder (22) in the sand-covered mold iron mold ejector mechanism (Z) are lowered to the lowest position; the sand-shooting and sand-covering mechanism (1) is moved to the middle parking position; The iron molds of the wind turbine main shaft product are assembled together with the corresponding model plates, and two of the assembled models and iron molds are respectively hoisted onto the main frame (21) of the sand-coated molding iron mold demoulding mechanism (Z) on the sand-coated molding station 1 (8) and the sand-coated molding station 2 (9); the mold plate is tightly fixed to the main frame (21) through the positioning process of the mold plate positioning mechanism (24) and the clamping process of the mold plate clamping mechanism (25); Then, the mobile sand-shooting and sand-covering mechanism (1) on the mobile track beam (5) can be moved to the accurate position above one of the two sand-shooting and sand-covering molding stations on the left and right sides of the equipment and stop, and start the sand-shooting and sand-covering molding operation for the iron mold on the station: the lifting cylinder (1-4) in the mobile sand-shooting and sand-covering mechanism (1) descends, driving the four sand-shooting heads to descend until the lower plane of the sand-shooting plate (1-15) is tightly pressed against the upper plane of the iron mold; the sand-shooting molding switch is turned on, and compressed air blows the coated sand into the model and the mold. The gap between the iron molds is completely filled and compacted with the coating sand; after the sand-shooting and coating process of the coating molding station is completed, the lifting cylinder (1-4) in the mobile sand-shooting and coating mechanism (1) rises to the top, driving the four sand-shooting heads to rise, and the lower plane of the sand-shooting plate (1-15) on the coating sand-shooting head (1-3) is completely separated from the upper plane of the iron mold, and the mobile sand-shooting and coating mechanism (1) moves away from the coating molding station, completing the sand-shooting and coating operation of the iron mold at the station; then the coating sand layer on the iron mold at the station begins to solidify After curing, the hydraulic mold-lifting cylinder (22) on the main frame (21) of the station is started, and the hydraulic cylinder mold-lifting push rod rises and contacts the lower plane of the iron mold running edge. Under the strong mold-lifting force of the hydraulic mold-lifting cylinder (22), the iron mold rises about 50 mm, so that the iron mold on the station is separated from the model by a certain distance; then the iron mold lifting electric cylinder (23) is turned on to make it rise, and under the lifting force of the iron mold lifting electric cylinder (23), the lifting beam (26) is driven to rise, and the upper plane of the lifting beam (26) is in contact with the iron mold running edge. The lower plane of the edge contacts with each other, driving the iron mold to rise until the lower plane of the iron mold is higher than the upper plane of the model, the iron mold and the model are completely separated, and the iron mold is lifted from the sand covering molding station, and then the model plate is also lifted from the sand covering molding station, completing the sand covering molding operation of the iron mold; then the other assembled wind turbine main shaft model plates and iron molds can be lifted to the sand covering molding station for sand covering molding; the sand covering molding operations of the iron molds at the two sand covering molding stations in the equipment are performed alternately to complete the sand covering molding of a group of iron molds required for casting wind turbine main shafts.

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