Casting method of axial flow turbine blade
A water turbine and axial flow technology, applied to casting molding equipment, casting molds, casting mold components, etc., to achieve the effects of increasing yield, overcoming long pouring time intervals, and reducing smelting costs
Active Publication Date: 2020-08-18
KOCEL STEEL
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In order to overcome the deficiencies in the prior art, the present invention provides a casting method for axial-flow turbine blades to reduce the problems of sand washing and secondary oxidation slag inclusions caused by excessively fast pouring speed of large-scale turbine blade castings, and to solve the problem of casting There is a problem of ladle temperature drop, stabilizing the quality of turbine blade castings
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] In order to facilitate understanding of the present invention, the present invention will be more fully described below in conjunction with specific embodiments and with reference to related drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0021] A casting method for an axial flow turbine blade, the casting of the axial flow turbine blade includes a blade and a shaft head; Place the blade up with the blade down for casting, this facilitates scumming. A riser neck 20 is set at the largest hot joint 10 of the axial flow turbine blade casting, wherein the hot joint at the shaft head position of the casting is the largest, that is, the riser neck 20 is set at the s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of casting and particularly relates to a casting method of an axial flow turbine blade. The casting method comprises the following steps: adopting the process scheme of simultaneously casting two axial flow turbine blade castings, and enabling a shaft head to be upwards and the blades to be downwards during the casting process; and enabling a pouring system to adopt a single ladle and a single water gap for pouring, and enabling the cavities of the two axial flow turbine blade castings to share one sprue. According to the casting method, two axial flow turbine blades are cast in the same box and share the pouring system and the riser scheme, so that the problems that the separate pouring time interval of the axial flow turbine blade is long, thetemperature drop is fast, and the ingate flow feeding speed is not uniform are solved, and the defects of casting sand washing and secondary oxidation slag inclusion caused by the problems are overcome; and in addition, on the premise of ensuring the blade process quality, the yield of the blade product is increased, and the smelting cost of molten steel is reduced.
Description
technical field [0001] The invention belongs to the technical field of casting, in particular to a casting method of an axial-flow water turbine blade. Background technique [0002] Axial flow turbine refers to the reaction type turbine in which the water flows into the runner from the axial direction and flows out from the axial direction along its blades to convert the energy of the water flow into mechanical energy. Under the same water flow height, the flow capacity of the axial flow type is larger than that of the mixed flow type, and the cavitation performance is worse than that of the mixed flow type. Therefore, the overall requirements for the blades of the axial flow turbine are high, and the casting process and molding method are complicated. The flow surface is not deformed, and the surface of the casting must not have defects such as pores, sand inclusions, shrinkage porosity, and cracks. [0003] The blades of axial flow turbines generally adopt the casting met...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): B22C9/08B22C9/20B22C9/10B22C9/02B22C9/22
CPCB22C9/082B22C9/088B22C9/103B22C9/20B22C9/22B22C9/02Y02E10/20
Inventor 马斌李文辉李昆周佼郭小强苏志东冯周荣孙健平
Owner KOCEL STEEL