Spraying water cooling device of wind power main shaft metal mold

Abstract

The utility model relates to a metal spraying water cooling device for a wind power main shaft, and belongs to the technical field of wind power main shafts. Comprising an annular water pipe, the annular water pipe surrounds the outer side of the bottom of a metal mold, a heat insulation unit is arranged between the annular water pipe and the metal mold, and the annular water pipe is supported on the heat insulation unit; a water inlet of the annular water pipe is connected with a high-pressure spraying machine through a main water pipe, a plurality of nozzles which are evenly distributed in the annular direction are arranged on the annular water pipe, and the spraying direction of the nozzles faces the metal mold. A power switch and a pressure knob are arranged on the high-pressure spraying machine, the power switch is used for controlling starting and stopping of spraying, and the pressure knob is used for adjusting water flow. The device is simple in structure and convenient to operate, spraying water cooling is conducted on a metal mold after pouring is finished, the cooling and solidification effect of a main shaft casting is accelerated, and the fatigue strength of a main shaft is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of spray water cooling device of wind power main shaft metal type, belong to wind power main shaft technical field. BACKGROUND

[0002] The environment of wind driven generator operation is relatively harsh, so the mechanical properties of its force components in main engine are required to be higher. The wind driven generator main shaft (hereinafter referred to as: wind power main shaft) blank, as the main force component, is usually forged by forged steel, and is machined after heat treatment, with high production cost.

[0003] In recent years, to reduce the production cost of wind power main shaft, wind power main shaft gradually begins to use nodular cast iron casting to replace forged piece production. The nodular cast iron main shaft casting is currently mainly produced by metal mold casting process.

[0004] To ensure that the wind power main shaft has good fatigue performance, metal mold is generally used as chilling material. However, from the actual effect, the size (thickness) of metal mold and the wall thickness of casting are not in linear relationship, which is easy to cause heat saturation, limited cooling capacity, and unable to guarantee the fatigue strength of casting. SUMMARY

[0005] The utility model provides a kind of spray water cooling device of wind power main shaft metal type for the above prior art, simple structure, convenient operation, can accelerate the cooling and solidification effect of main shaft, improve the fatigue strength of main shaft.

[0006] The utility model discloses the technical scheme adopted to solve the above problems: a kind of spray water cooling device of wind power main shaft metal type, including annular water pipe, the annular water pipe surrounds metal type bottom outside, the annular water pipe is filled with heat insulation unit between metal type, so that annular water pipe is supported on heat insulation unit;The water inlet of the annular water pipe is connected with high-pressure sprayer by main water pipe, the annular water pipe is equipped with multiple annularly distributed nozzles, the direction of the nozzle spray is towards metal type;High-pressure sprayer is equipped with power switch and pressure knob, the power switch is used to control the opening and closing of spraying, the pressure knob is used to adjust water flow.

[0007] The gap between the annular water pipe and the metal type is 18-23mm.

[0008] The heat insulation unit includes multiple heat insulation pads, and the multiple heat insulation pads are annularly distributed and arranged in a staggered manner with the nozzles.

[0009] The heat insulation pad is made of refractory material.

[0010] The linear distance between adjacent two nozzles is 280-330mm

[0011] Compared with the existing technology, the advantages of the utility model are: a spray water cooling device for the wind turbine main shaft metal mold has a simple structure and is easy to operate. After the pouring is completed, the metal mold is sprayed with water to cool it, which accelerates the cooling and solidification effect of the main shaft casting and improves the fatigue strength of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the installation of a metal-type spray water cooling device for a wind turbine main shaft according to an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 A top view of

[0014] In the figure, 1 is the clay core, 2 is the metal mold, 3 is the main shaft casting, 4 is the annular water pipe, 5 is the nozzle, 6 is the heat insulation pad, 7 is the main water pipe, 8 is the high-pressure sprayer, 9 is the power switch, and 10 is the pressure knob. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 、 2 As shown, a spray water cooling device for a wind turbine main shaft metal mold in this embodiment includes an annular water pipe 4 with an outer diameter of 10 mm. The annular water pipe 4 is arranged around the outer side of the bottom of the metal mold 2. The gap between the annular water pipe 4 and the metal mold 2 is set to 20 mm, ensuring the spray water cooling effect. The gap between the annular water pipe 4 and the metal mold 2 is filled with a heat insulation unit so that the annular water pipe 4 is supported on the heat insulation unit. The water inlet of the annular water pipe 4 is connected to the high-pressure sprayer 8 through the main water pipe 7. The annular water pipe 4 is provided with multiple circumferentially evenly distributed water outlets, and nozzles 5 are respectively provided on the water outlets. The nozzles 5 spray downwardly onto the metal mold. The high-pressure sprayer is provided with a power switch 9 and a pressure knob 10. The power switch is used to control the opening and closing of the spray, and the pressure knob is used to adjust the water flow. A clay core 1 is provided in the metal mold 2. The gap between the two constitutes the main shaft forming cavity. Molten iron is poured into the main shaft forming cavity to form the main shaft casting 3. After pouring, turn on the power switch of the high-pressure sprayer, and the cooling water flows into the annular water pipe through the main water pipe, and then the nozzle sprays water to cool the metal mold, which accelerates the cooling and solidification of the spindle casting and improves the fatigue strength of the spindle casting.

[0017] The above-mentioned heat insulation unit comprises a plurality of heat insulation pads 6, which are evenly distributed in the circumferential direction and staggered with the nozzles. The heat insulation pads are made of refractory material, so that the contact material between the metal mold and the annular water pipe has heat insulation properties.

[0018] The linear distance between two adjacent nozzles is 300 mm.

[0019] For different size, wall thickness of main shaft, through the power switch and pressure knob control of high pressure sprayer metal type water flow and spray time.

[0020] The application has simple structure and convenient operation, sprays water to the metal mold after pouring to accelerate the cooling and solidification of the main shaft castings and improve the fatigue strength of the main shaft.

[0021] In addition to the above embodiments, the utility model also includes other implementation manners, and the technical solutions formed by using equivalent transformation or equivalent replacement should fall within the protection scope of the utility model claims.

Claims

1. A water spray cooling device for a wind turbine main shaft metal mold, characterized by: The invention relates to a metal mold cooling device, comprising a ring-shaped water pipe, which surrounds the outside of a metal mold, and a heat insulation unit, which is filled between the ring-shaped water pipe and the metal mold, so that the ring-shaped water pipe is supported on the heat insulation unit; a water inlet of the ring-shaped water pipe is connected with a high-pressure spraying machine through a main water pipe, a plurality of nozzles are arranged on the ring-shaped water pipe and are uniformly distributed in a ring direction, and the spraying direction of the nozzles is towards the metal mold; a power switch and a pressure knob are arranged on the high-pressure spraying machine, the power switch is used to control the opening and closing of the spraying, and the pressure knob is used to adjust the water flow.

2. The water spray cooling device for the metal type of wind power main shaft according to claim 1, characterized in that: The gap between the ring-shaped water pipe and the metal mold is 18-23 mm.

3. The water spray cooling device for the metal type of wind power main shaft according to claim 1, characterized in that: The heat insulation unit comprises a plurality of heat insulation pads, which are uniformly distributed in a ring direction and are arranged in a staggered manner with the nozzles.

4. The water spray cooling device for the metal type of wind power main shaft according to claim 3, characterized in that: The heat insulation pad is made of refractory material.

5. The water spray cooling device for the metal type of wind power main shaft according to claim 1, characterized in that: The linear distance between two adjacent nozzles is 280-330 mm.

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