Supercritical gas turbine guide vane and digital casting process

Abstract

The application discloses a supercritical gas turbine guide ring and a digital casting process, which comprises an outer ring casting and an inner ring, a first limiting groove and a second limiting groove are arranged on the inner wall surface of the outer ring casting; a first limiting lug is integrally arranged on the outer surface of the inner ring, and the first limiting lug is inserted into the first limiting groove; an opening is arranged on the inner ring in alignment with the position of the first limiting lug, a limiting plug is arranged in the opening, and a sealing strip is arranged between the side surface of the limiting plug and the inner wall surface of the opening; a second limiting lug is integrally arranged on the outer surface of the limiting plug at the middle position, the second limiting lug is inserted into the second limiting groove, a bolt through hole is arranged in the second limiting groove, a stainless steel bolt is arranged in the bolt through hole, and the limiting plug is locked by the stainless steel bolt. The above technical scheme has the advantages of reasonable structure design, simple installation, easy maintenance and good practicability.

Description

Technical Field

[0001] This invention relates to the field of gas turbine parts technology, specifically to a supercritical gas turbine guide ring and its digital casting process. Background Technology

[0002] Existing technology, such as the guide ring for a steam turbine exhaust cylinder disclosed in Chinese Patent Publication No. CN204851345U, includes a flange assembly and a ring plate assembly fixedly connected to the flange assembly. The upper surface of the flange assembly is provided with an installation positioning stop for connecting the ring plate assembly, and the inner wall of the flange assembly is provided with a steam seal installation groove. The ring plate assembly includes a slanted straight segment ring plate, a circular arc segment ring plate, and an orthogonal straight segment ring plate, all integrally structured. Several supporting ribs are fixedly connected between the upper surface of the flange assembly and the outer surface of the ring plate assembly. The supporting ribs are provided with lifting holes and water pipe positioning grooves for fixing water spray pipes. The flange assembly is configured as a pair of mating and fixedly connected semi-circular flanges. The ring plate assembly is configured as a pair of mating and fixedly connected semi-circular ring plates.

[0003] In the aforementioned prior art, the guide ring and ring plate assembly are configured as a pair of semi-circular ring plates that are fixedly connected. During the fixed connection process, due to the large size of the ring plate assembly, it is not easy to align them, which will cause positional deviations, resulting in troublesome installation, difficult maintenance, and poor practicality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a supercritical gas turbine guide ring with a reasonable structural design, simple installation, easy maintenance, and good practicality, as well as a digital casting process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a supercritical gas turbine guide ring, comprising an outer ring casting and an inner ring, wherein a first limiting groove and a second limiting groove are provided on the inner wall surface of the outer ring casting; a first limiting protrusion is integrally provided on the outer surface of the inner ring, and the first limiting protrusion is inserted into the first limiting groove;

[0006] The inner ring is provided with an opening aligned with the position of the first limiting protrusion, and a limiting block is provided in the opening. A sealing strip is provided between the side of the limiting block and the inner wall of the opening.

[0007] A second limiting protrusion is integrally provided at the middle position of the outer surface of the limiting block. The second limiting protrusion is inserted into the second limiting groove. A bolt through hole is provided in the second limiting groove. A stainless steel bolt is provided in the bolt through hole. The limiting block is locked by the stainless steel bolt.

[0008] Preferably, the opening is a conical opening, the side of the limiting block is an inclined surface, and the size and structure of the limiting block match the conical opening.

[0009] Preferably, the inner ring is made of cast steel or resin, and the limiting block is made of cast steel or alloy.

[0010] Preferably, the casting process of the outer ring casting includes the following steps:

[0011] (1) Make an outer ring sand mold, one end of which has a cavity and a transverse gating, and the center of which has a longitudinal gating that runs through the sand mold;

[0012] (2) The longitudinal runners of the sand molds are connected to each other. A bottom plate is set at the bottom of the lowest sand mold, and a top mold with a pouring port is set at the top of the highest sand mold. The pouring port is connected to the longitudinal runners of the lower sand mold.

[0013] (3) Transfer the stacked sand mold to the casting area, and pour molten iron into the sand mold through the pouring port. Set the molten iron tapping temperature to 1500-1600℃ and the casting temperature to 1300-1400℃.

[0014] (4) After the sand mold is poured, it is cooled to room temperature and then the sand is removed to clean the surface of the casting.

[0015] (5) Place the casting into a shot blasting machine for polishing to remove surface impurities;

[0016] (6) Heat the casting to 1000℃ for quenching, and the quenching time is 4min;

[0017] (7) Reheat the casting to 620°C for tempering for 3 hours; cool to room temperature after tempering.

[0018] At the specified temperature, the outer ring casting is complete.

[0019] As a preferred embodiment: the casting process of the outer ring casting is monitored by a digital monitoring system for casting process: real-time reception of casting equipment production process parameters, production product information, mold information, and on-site operators or technicians adjust the on-site casting equipment production process parameters according to quality inspection results such as X-ray inspection, appearance inspection, or machine adjustment inspection.

[0020] When the digital monitoring system for casting processes detects a change in the production process parameters on the casting equipment, the system will begin to track and record this process change.

[0021] If there are no further changes to the process parameters one hour after the last adjustment, the system will summarize and record the process parameter adjustment history, forming a complete process parameter adjustment result in the system. Subsequently, relevant management personnel can select or input the reason for the process change in the system based on the full record of the process adjustment result in the system, and write the corresponding reason analysis to form a casting equipment process change adjustment data.

[0022] Preferably, the digital monitoring system for the casting process includes an information acquisition module, a data processing module, and a data analysis module.

[0023] Information acquisition module: Used to collect real-time information from casting equipment and quality inspection equipment, to know the current production status of casting products, mold model, process parameter information, to monitor products with abnormal quality inspection results and to monitor casting process changes in real time, and to connect to the casting intelligent machine adjustment system and mold management system to retrieve relevant process parameters;

[0024] Data processing module: Records every change in the casting process, and summarizes and aggregates key information such as the results of each casting process adjustment, process parameters, and cause analysis based on the on-site handling situation;

[0025] Data analysis module: Used to record every change and adjustment of process parameters, and to accumulate process parameter adjustment process, cause analysis and machine adjustment experience to form a knowledge base.

[0026] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0027] Compared with the prior art, the present invention has a reasonable structural design. After the improvement of the outer ring casting and inner ring structure, the limiting block is locked by stainless steel bolts, thereby pressing the limiting block against the inner ring. The limiting block and the inner wall surface of the inner ring opening are sealed by a sealing strip. It is simple to install, easy to maintain and has good practicality.

[0028] The digital monitoring system for casting processes can replace manual recording, inspection, and verification based on real-time data collected from each casting machine regarding products, molds, and production processes. It also allows for precise monitoring based on pre-set inspection times.

[0029] By creating process inspection records for each casting machine during each shift, not only is manual labor time significantly reduced, but the accuracy of the data is also ensured.

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0032] Figure 2 for Figure 1 Enlarged schematic diagram of section I;

[0033] Figure 3 This is a schematic diagram of the digital monitoring system for casting process according to an embodiment of the present invention. Detailed Implementation

[0034] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] See Figure 1 , Figure 2 and Figure 3 The present invention discloses a supercritical gas turbine guide ring, comprising an outer ring casting 1 and an inner ring 2. The inner wall surface of the outer ring casting 1 is provided with a first limiting groove 11 and a second limiting groove 12; the outer surface of the inner ring 2 is integrally provided with a first limiting protrusion 21, which is inserted into the first limiting groove 11.

[0036] The inner ring 2 is provided with an opening 22 aligned with the position of the first limiting protrusion. A limiting block 3 is provided in the opening 22. A sealing strip 4 is provided between the side of the limiting block 3 and the inner wall of the opening.

[0037] The second limiting protrusion 31 is integrally provided at the middle position of the outer surface of the limiting block 3. The second limiting protrusion 31 is inserted into the second limiting groove 12. The second limiting groove 12 is provided with a bolt through hole 13. A stainless steel bolt 5 is provided in the bolt through hole 14. The limiting block 3 is locked by the stainless steel bolt 5.

[0038] Preferably, the opening 22 is a conical opening, the side of the limiting block 3 is an inclined surface, and the size and structure of the limiting block 3 match the conical opening.

[0039] The inner ring 2 is made of cast steel or resin, and the limiting block 3 is made of cast steel or alloy.

[0040] This invention also provides a digital casting process for a supercritical gas turbine guide ring, wherein the casting process for the outer ring casting includes the following steps:

[0041] (1) Make an outer ring sand mold, one end of which has a cavity and a transverse gating, and the center of which has a longitudinal gating that runs through the sand mold;

[0042] (2) The longitudinal runners of the sand molds are connected to each other. A bottom plate is set at the bottom of the lowest sand mold, and a top mold with a pouring port is set at the top of the highest sand mold. The pouring port is connected to the longitudinal runners of the lower sand mold.

[0043] (3) Transfer the stacked sand mold to the casting area, and pour molten iron into the sand mold through the pouring port. Set the molten iron tapping temperature to 1500-1600℃ and the casting temperature to 1300-1400℃.

[0044] (4) After the sand mold is poured, it is cooled to room temperature and then the sand is removed to clean the surface of the casting.

[0045] (5) Place the casting into a shot blasting machine for polishing to remove surface impurities;

[0046] (6) Heat the casting to 1000℃ for quenching, and the quenching time is 4min;

[0047] (7) Reheat the casting to 620°C for tempering for 3 hours; after tempering, cool to room temperature and the outer ring casting is completed.

[0048] Preferably, when the inner ring 2 is made of cast steel, its casting process is the same as that of the outer ring casting.

[0049] The casting process of the outer ring casting is monitored by a digital monitoring system for casting process: real-time reception of casting equipment production process parameters, production product information, and mold information; on-site operators or technicians adjust the production process parameters of the on-site casting equipment based on quality inspection results such as X-ray inspection, appearance inspection, or machine adjustment inspection.

[0050] When the digital monitoring system for casting processes detects a change in the production process parameters on the casting equipment, the system will begin to track and record this process change.

[0051] If there are no further changes to the process parameters one hour after the last adjustment, the system will summarize and record the process parameter adjustment history, forming a complete process parameter adjustment result in the system. Subsequently, relevant management personnel can select or input the reason for the process change in the system based on the full record of the process adjustment result in the system, and write the corresponding reason analysis to form a casting equipment process change adjustment data.

[0052] Preferably, the digital monitoring system for the casting process includes an information acquisition module, a data processing module, and a data analysis module.

[0053] Information acquisition module: Used to collect real-time information from casting equipment and quality inspection equipment, to know the current production status of casting products, mold model, process parameter information, to monitor products with abnormal quality inspection results and to monitor casting process changes in real time, and to connect to the casting intelligent machine adjustment system and mold management system to retrieve relevant process parameters;

[0054] Data processing module: Records every change in the casting process, and summarizes and aggregates key information such as the results of each casting process adjustment, process parameters, and cause analysis based on the on-site handling situation;

[0055] Data analysis module: Used to record every change and adjustment of process parameters, and to accumulate process parameter adjustment process, cause analysis and machine adjustment experience to form a knowledge base.

[0056] In practical applications, the improved outer ring casting and inner ring structure are secured by locking the limiting plug with stainless steel bolts, thereby pressing the limiting plug against the inner ring. A sealing strip is used to form a seal between the limiting plug and the inner wall of the inner ring opening. The structure is reasonably designed, easy to install, easy to maintain, and highly practical.

[0057] The digital monitoring system for casting processes can replace manual recording, inspection, and verification based on real-time data collected on the products, molds, and production processes of each casting machine. According to the pre-set inspection times in the system, it generates process inspection records for each casting machine in each shift, which not only saves a significant amount of manual time but also ensures the accuracy of the data.

[0058] The above embodiments, which describe the specific features of the present invention, are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above description of the invention shall fall within the scope of protection of the present invention.

Claims

1. A digital casting process for a supercritical gas turbine guide ring, the supercritical gas turbine guide ring comprising an outer ring casting and an inner ring, wherein a first limiting groove and a second limiting groove are provided on the inner wall surface of the outer ring casting; a first limiting protrusion is integrally provided on the outer surface of the inner ring, the first limiting protrusion being inserted into the first limiting groove; an opening is provided on the inner ring aligned with the position of the first limiting protrusion, a limiting plug is provided in the opening, and a sealing strip is provided between the side of the limiting plug and the inner wall surface of the opening; a second limiting protrusion is integrally provided at the middle position of the outer surface of the limiting plug, the second limiting protrusion being inserted into the second limiting groove, a bolt through hole is provided in the second limiting groove, a stainless steel bolt is provided in the bolt through hole, and the limiting plug is locked by the stainless steel bolt; the opening is a conical opening, the side of the limiting plug is a slope, and the size and structure of the limiting plug match the conical opening; characterized in that: The casting process of the outer ring casting includes the following steps: (1) Make an outer ring sand mold, one end of which has a cavity and a transverse gating, and the center of which has a longitudinal gating that runs through the sand mold; (2) The longitudinal runners of the sand molds are connected to each other. A bottom plate is set at the bottom of the lowest sand mold, and a top mold with a pouring port is set at the top of the highest sand mold. The pouring port is connected to the longitudinal runners of the lower sand mold. (3) Transfer the stacked sand mold to the casting area, and pour molten iron into the sand mold through the pouring port. Set the molten iron tapping temperature to 1500-1600℃ and the casting temperature to 1300-1400℃. (4) After the sand mold is poured, it is cooled to room temperature and then the sand is removed to clean the surface of the casting. (5) Place the casting into a shot blasting machine for polishing to remove surface impurities; (6) Heat the casting to 1000℃ for quenching, and the quenching time is 4min; (7) Reheat the casting to 620°C for tempering for 3 hours; cool to room temperature after tempering. At the specified temperature, the outer ring casting is complete.

2. The digital casting process for a supercritical gas turbine guide ring according to claim 1, characterized in that: The casting process of the outer ring casting is monitored by a digital monitoring system for casting process: real-time reception of casting equipment production process parameters, production product information, and mold information; on-site operators or technicians adjust the production process parameters of the on-site casting equipment based on the quality inspection results of X-ray inspection, appearance inspection, or machine adjustment inspection. When the digital monitoring system for casting processes detects a change in the production process parameters on the casting equipment, the system will begin to track and record this process change. If there are no further changes to the process parameters one hour after the last adjustment, the system will summarize and record the process parameter adjustment history, forming a complete process parameter adjustment result in the system. Subsequently, relevant management personnel can select or input the reason for the process change in the system based on the full record of the process adjustment result in the system, and write the corresponding reason analysis to form a casting equipment process change adjustment data.

3. The digital casting process for a supercritical gas turbine guide ring according to claim 2, characterized in that: The digital monitoring system for the casting process includes an information acquisition module, a data processing module, and a data analysis module. Information acquisition module: Used to collect real-time information from casting equipment and quality inspection equipment, to know the current production status of casting products, mold model, process parameter information, to monitor products with abnormal quality inspection results and to monitor casting process changes in real time, and to connect to the casting intelligent machine adjustment system and mold management system to retrieve relevant process parameters; Data processing module: Records every change in the casting process, and summarizes and aggregates the key information of each casting process adjustment result, process parameters, and cause analysis based on the on-site handling situation; Data analysis module: Used to record every change and adjustment of process parameters, and to accumulate process parameter adjustment process, cause analysis and machine adjustment experience to form a knowledge base.

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