CN204934512U - The pouring gate structure of wind power generator group toggle casting moulding system - Google Patents

Abstract

The utility model relates to a sprue structure of a torsion arm casting pouring system of a wind power generating set, comprising an upper sprue (1), an upper horizontal sprue (2), a lower sprue (3), a lower horizontal sprue (4 ), transition runner (6) and two inner runners (5), the lower end of the upper sprue (1) communicates with one end of the upper runner (2), and the upper end of the lower sprue (3) connects with the upper runner (2) The bottom is connected, the lower end of the lower sprue (3) is connected with one end of the lower runner (4), the other end of the lower runner (4) is connected with the middle of the bottom of the transition runner (6), and the two inner runners (5) The lower ends communicate with both ends of the transition runner (6), and the upper ends of the two inner runners (5) communicate with the lower ends of the sand mold of the torsion arm casting of the wind power generating set. The utility model has the advantages of not only effectively avoiding slag inclusions in the casting, but also effectively avoiding pores in the casting, and also effectively avoiding shrinkage cavities inside the casting.

Description

The runner structure of the pouring system of the torsion arm casting of the wind power generating set

technical field

The utility model relates to the casting field of castings, in particular to a sprue structure for a casting system of a torsion arm casting of a wind power generating set.

Background technique

The torsion arm of the wind turbine is an important component in the wind turbine, and its main function is to transmit the power generated by the wind wheel under the action of the wind to the generator. The sprue structure of the existing sprue system for torque arm castings of wind power generators, as shown in Figure 1, includes a sprue 101, a runner 102 and two inner runners 103, the lower end of the sprue 101 and the runner 102 communicates with each other. One end of the two ingates 103 communicates with the runner 102, and the other end of the two ingates 103 communicates with the middle part of the side of the casting sand mold 104. Although the runner structure of the torsion arm casting gating system of the above-mentioned wind power generating set is simple in structure, it has the following disadvantages in the actual application process: 1. Since one end of the inner runner 103 is connected with the middle part of the side of the casting sand mold 104, therefore When pouring, there is a large height difference between the position where the molten iron enters the casting sand mold 104 and the bottom of the casting sand mold 104, which easily causes the molten iron to pour down after entering the casting sand mold 104, causing the molten iron to continuously roll and splash. Magnesium, rare earth, silicon, manganese, iron and other elements produce secondary oxidation, and these secondary oxides will form scum and adhere to the surface of the casting, thus causing casting defects of slag inclusion in the casting; 2. The molten iron is downward It is easy to form turbulent flow when pouring, and turbulent flow will lead to air entrainment, which will easily cause casting defects such as pores in the casting; 3. When the molten iron is pouring downward, it will impact the bottom of the casting sand mold 104, thereby easily forming sand washing, thereby It is a casting defect that causes sand to mix into the molten iron, eventually causing shrinkage cavities inside the casting.

Utility model content

A technical problem to be solved by the utility model is to provide a pouring system for torsion arm castings of wind power generators that can not only effectively avoid slag inclusions in castings, but also effectively avoid pores in castings, and also effectively avoid shrinkage cavities inside castings. The runner structure.

In order to solve the above technical problems, the utility model provides a sprue structure of the torsion arm casting gating system of the wind power generating set with the following structure: it includes an upper sprue, an upper horizontal sprue and two inner sprues, The lower end of the channel is connected with one end of the upper runner. The runner structure of the torsion arm casting system of the wind power generating set also includes the lower sprue, the lower runner and the transition runner. The upper end of the lower sprue and the upper runner The bottom is connected, the lower end of the lower straight runner is connected with one end of the lower runner, the other end of the lower runner is connected with the middle of the bottom of the transition runner, the lower ends of the two inner runners are respectively connected with the two ends of the transition runner, and the two inner runners The upper ends of the roads are connected with the lower ends of the sand molds of the torsion arm castings of the wind power generating set.

The runner structure of the torsion arm casting pouring system of the wind power generating set described in the utility model, wherein, a buffer chamber is arranged in the middle of the top of the transition runner, and the buffer chamber communicates with the transition runner.

The runner structure of the torsion arm casting pouring system of the wind power generating set described in the utility model, wherein, the connection between the lower straight runner and the lower horizontal runner and the connection between the lower horizontal runner and the transition runner are both For circular arc transition.

The sprue structure of the torsion arm casting pouring system of the wind power generating set described in the utility model, wherein, the upper sprue, the upper horizontal sprue, the lower sprue, the lower horizontal sprue, the transition sprue and two inner sprues Both are made of ceramic tubes.

The sprue structure of the torsion arm casting gating system of the wind power generating set described in the utility model, wherein, the upper end of the lower sprue communicates with the bottom of the upper horizontal sprue.

After adopting the above-mentioned structure, compared with the prior art, the utility model has the following advantages: 1. Since the runner structure of the torsion arm casting system of the wind power generator set of the utility model is improved by adding the lower sprue, the lower transverse runner and the transition The runner sets the two inner runners to the bottom of the sand mold of the torsion arm casting of the wind power generating set, and the upper ends of the two inner runners are connected with the lower end of the sand mold, so when pouring, the molten iron will enter from the bottom of the sand mold In this sand mold, the height difference between the outlets of the molten iron in the two ingates and the sand mold is eliminated, thereby effectively avoiding the continuous tumbling and splashing of the molten iron during pouring, which will cause magnesium, rare earth, silicon, manganese, iron and other elements The occurrence of secondary oxidation, thereby avoiding the occurrence of slag inclusions in the torsion arm castings of wind power generator sets due to the formation of scum due to secondary oxides in molten iron, ensuring the quality of torsion arm castings of wind power generator sets; 2. There is no height difference between the molten iron outlets of the two ingates and the sand mold, thus effectively avoiding the occurrence of gas entrainment caused by the turbulent flow of the molten iron during pouring, thereby avoiding the occurrence of pores in the torsion arm castings of wind power generating sets 3. Since the molten iron enters the sand mold from the bottom of the sand mold, and there is no height difference between the outlets of the two ingates and the sand mold, Therefore, the molten iron will not form an impact on the bottom of the sand mold during pouring, thereby avoiding the formation of sand washing, thereby effectively avoiding the occurrence of shrinkage cavities in the torsion arm casting of the wind power generating set, and ensuring the torsion arm casting of the wind power generating set. quality.

The buffer chamber set in the middle of the top of the transition runner can make the molten iron rush into the buffer chamber after entering the transition runner, and then flow out from the buffer chamber and flow into the two inner runners from both ends of the transition runner. Therefore, the molten iron can smoothly flow into the sand mold of the torsion arm casting of the wind power generating set after being buffered by the buffer chamber, thereby effectively avoiding turbulent flow, splashing, and rolling of the molten iron during pouring, and preventing the formation of entrained air. Furthermore, the occurrence of air holes in the torsion arm casting of the wind power generating set is avoided, and the quality of the torsion arm casting of the wind power generating set is guaranteed.

The connection between the lower sprue and the lower runner and the connection between the lower runner and the transition runner are arc-shaped transitions, which can greatly reduce the erosion of the molten iron on the above two positions , so that the formation of sand washing can be effectively avoided, thereby not only effectively avoiding the occurrence of shrinkage cavities in the torsion arm casting of the wind power generating set, but also ensuring the quality of the torsion arm casting of the wind power generating set, and also ensuring the torque of the wind power generating set of the utility model The normal use of the runner structure of the arm casting gating system.

The upper sprue, the upper runner, the lower sprue, the lower runner, the transition runner and the two inner runners are all made of ceramic tubes. contact, so that the formation of sand washing can be effectively avoided, and then not only effectively avoid the occurrence of shrinkage cavity in the torsion arm casting of the wind power generating set, but also ensure the quality of the torsion arm casting of the wind power generating set, and also ensure that the wind power generating set of the utility model The normal use of the runner structure of the torque arm casting gating system.

The purpose of the connection between the upper end of the lower sprue and the bottom of the upper runner is: at the beginning of pouring, there will be air in the upper sprue and the upper runner, so when the molten iron flows into the upper sprue and the upper runner When it is in the channel, it will be in contact with the air and produce oxidation, which will produce a small amount of scum, and these scum will be washed to the end of the upper runner away from the upper sprue along with the molten iron, so the lower sprue The connection between the upper end and the bottom of the upper runner can keep the scum always at the end of the upper runner away from the upper sprue, preventing the scum from entering the sand mold of the torque arm casting of the wind power generating set with the molten iron, thereby avoiding This prevents the occurrence of slag inclusions in the torsion arm castings of the wind power generating set, and ensures the quality of the torsion arm castings of the wind power generating set.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the runner structure of the torsion arm casting gating system of the wind power generating set in the prior art;

Fig. 2 is a three-dimensional structural schematic diagram of the runner structure of the torsion arm casting gating system of the wind power generating set of the utility model.

detailed description

The runner structure of the torsion arm casting system for the wind power generating set of the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 2, the sprue structure of the torsion arm casting system of the wind power generating set of the utility model includes an upper sprue 1, an upper horizontal sprue 2 and two inner sprues 5, the lower end of the upper sprue 1 and the upper horizontal sprue One end of the runner 2 is connected. The runner structure of the torsion arm casting system of the wind power generating set also includes the lower sprue 3, the lower runner 4 and the transition runner 6. The upper end of the lower sprue 3 is connected to the bottom of the upper runner 2. The middle is connected, the lower end of the lower straight runner 3 is connected with one end of the lower runner 4, the other end of the lower runner 4 is connected with the middle of the bottom of the transition runner 6, and the lower ends of the two inner runners 5 are respectively connected with the two ends of the transition runner 6 Connected, the upper ends of the two inner runners 5 are connected with the lower end of the sand mold of the torque arm casting of the wind power generating set, and a buffer cavity 7 is provided in the middle of the top of the transition runner 6, and the buffer cavity 7 is connected with the transition runner 6, and the lower straight runner 3 The connection between the lower runner 4 and the connection between the lower runner 4 and the transition runner 6 are arc-shaped transitions, the upper sprue 1, the upper runner 2, the lower sprue 3. The lower runner 4, the transition runner 6 and the two inner runners 5 are all made of ceramic tubes, that is to say, each runner is composed of a single ceramic tube of corresponding shape, or is spliced by multiple ceramic tubes. The lower sprue 3 and the lower runner 4 and the lower runner 4 and the transition runner 6 are respectively connected through an arc-shaped ceramic tube. The material of the ceramic tube is the existing conventional technology, so I won't go into details here.

The above embodiment is only a description of the preferred implementation of the utility model, not to limit the scope of the utility model. Without departing from the design spirit of the utility model, those of ordinary skill in the art made the technical solution of the utility model Various modifications and improvements should fall within the scope of protection determined by the claims of the utility model.

Claims (5)

1. A runner structure of a wind power generating set torque arm casting gating system, comprising an upper sprue (1), an upper runner (2) and two inner runners (5), the upper sprue ( 1) The lower end communicates with one end of the upper runner (2), which is characterized in that the runner structure of the torsion arm casting system of the wind power generating set also includes a lower sprue (3), a lower runner (4) and transition runner (6), the upper end of the lower sprue (3) communicates with the bottom of the upper runner (2), and the lower end of the lower runner (3) communicates with one end of the lower runner (4). The other end of the lower runner (4) communicates with the middle of the bottom of the transition runner (6), the lower ends of the two inner runners (5) communicate with the two ends of the transition runner (6) respectively, and the two inner runners (5) communicate with each other. The upper ends of the runners (5) are all communicated with the lower ends of the sand molds of the torsion arm castings of the wind power generating set. 2. The runner structure of the torsion arm casting gating system of the wind power generating set according to claim 1, characterized in that: a buffer chamber (7) is provided in the middle of the top of the transition runner (6), and the buffer chamber ( 7) communicate with the transition runner (6). 3. The sprue structure of the torsion arm casting gating system of the wind power generating set according to claim 1 or 2, characterized in that: the connection between the lower sprue (3) and the lower transverse sprue (4) And the connection between the lower runner (4) and the transition runner (6) is a circular arc transition. 4. The sprue structure of the torsion arm casting gating system of the wind power generating set according to claim 3, characterized in that: the upper sprue (1), the upper runner (2), the lower sprue (3 ), the lower runner (4), the transition runner (6) and the two inner runners (5) are all made of ceramic tubes. 5. The sprue structure of the torsion arm casting gating system of the wind power generating set according to claim 1 or 2, characterized in that: the upper end of the lower sprue (3) communicates with the bottom of the upper runner (2).