High-speed rotation creep test device and test method for power station steam turbine rotor

Abstract

The present invention belongs to the technical field of metal alloy casting application, and specifically discloses a high-speed rotation creep test device for a power station steam turbine rotor, which is composed of a vertical support frame assembly, a heating assembly used in conjunction with the vertical support frame assembly, and a rotation assembly used in conjunction with the vertical support frame assembly and the heating assembly. The beneficial effects of the high-speed rotation creep test device for a power station steam turbine rotor of the present invention and its test method are: 1. Its overall structural design is reasonable, which is convenient for performing a real high-speed rotation creep test on the steam turbine rotor, performing structural strength and composite fatigue life model verification processing on the high-speed rotation creep, completing life prediction and analysis, and improving the safety of power station steam turbine operation; 2. It can perform auxiliary test analysis processing on the production and manufacture of steam turbine rotors.

Description

Technical Field

[0001] The invention belongs to the technical field of metal alloy casting application, and in particular relates to a high-speed rotation creep test device and a test method for a power station steam turbine rotor. Background Art

[0002] At the end of 2016, my country's thermal power generation accounted for about 70%, and the total installed capacity of thermal power accounted for 60%. As of the end of July this year, there were 101 supercritical units; by the end of 2015, my country's natural gas power generation installed capacity had reached 66.37 million kilowatts; in 2016, the proportion of natural gas power generation will reach 33%, exceeding the proportion of coal power for the first time (estimated to be 32%). The shale gas revolution in the United States has achieved new phased results, new energy has developed beyond the norm, the proportion of local areas is too large, the overall installed capacity of power generation is in excess, the growth of electricity load has slowed down, and supercritical thermal power units have been put on the agenda for deep peak regulation. While emphasizing the efficiency and cleanliness of thermal and gas power, more attention is paid to safety and flexibility.

[0003] The R0110 heavy-duty gas turbine design and development project, one of the major special projects of the National Science and Technology Department's 863 Advanced Energy Technology Program for gas turbines, was officially launched in October 2002. After 10 years of hard work, it has made breakthrough progress. On November 29, 2013, the R0110 heavy-duty gas turbine completed a 168-hour combined cycle test operation assessment at CNOOC Shenzhen Power Co., Ltd. As of 10:00 on the 29th, the combined cycle test gas turbine had accumulated a total operation of 209 hours and 20 minutes, and the steam turbine had accumulated a total operation of 187 hours and 57 minutes. All performance indicators of the unit fully met the design requirements.

[0004] The performance of the R0110 heavy-duty gas turbine independently developed by my country can only be considered E-class+ (maximum temperature between 1200˚C-1300˚C), which is one and a half generations behind the H-class gas turbine (E-class -> F-class -> H-class, the H-class can reach a maximum of more than 1600˚C). Although the manufacturing of F-class gas turbines has been introduced for many years, China still does not master key technologies such as hot end components and control systems, let alone compete with foreign countries.

[0005] There is still a big gap between the design, materials, manufacturing, and processes of domestic heavy-duty gas turbines, especially F-class and H-class gas turbines with temperatures exceeding 1400˚C, and the international advanced level. The damage and failure mechanisms of high-temperature structures and components in some design processes have not been fully understood in theory and cannot be used to guide the design of heavy-duty gas turbine components.

[0006] Since the international bidding project for the first bundle of 23 heavy-duty gas turbine combined cycle power plant equipment in my country was launched in 2003, F-class gas turbines have had more than 10 years of operating experience in China. Differences in unit design and operating conditions will cause accidents and unplanned shutdowns of gas turbines. For example, in recent years, gas turbines have been used in southern my country to participate in power grid peak-shaving operations, and the accident rate and life loss have greatly exceeded the design values. At the same time, due to peak-shaving and daily start-stop operation, high-temperature low-cycle fatigue and creep high temperature in complex environments cause crack initiation and development, and finally lead to accidents.

[0007] The main reasons for the above-mentioned problems in high-temperature components of power plants are blades, rotors, elbows and other components. The fatigue creep damage mechanism under multi-axial loads needs further study, and the composite fatigue life model verification test has not been carried out. At the same time, the strength and life prediction methods and analysis of key high-temperature alloy structures under multi-field loads / environments need to be carried out.

[0008] Therefore, based on the above problems, the present invention provides a high-speed rotation creep test device and a test method for a power plant steam turbine rotor. Summary of the invention

[0009] Purpose of the invention: The purpose of the present invention is to provide a high-speed rotation creep test device and a test method for a power plant steam turbine rotor. The overall structural design is reasonable, which is convenient for performing a real high-speed rotation creep test on the steam turbine rotor, performing structural strength and composite fatigue life model verification on the high-speed rotation creep, completing life prediction and analysis, and improving the safety of power plant steam turbine operation.

[0010] Technical solution: One aspect of the present invention provides a high-speed rotation creep test device for a power plant turbine rotor, which is composed of a vertical support frame assembly, a heating assembly used in conjunction with the vertical support frame assembly, and a rotating assembly used in conjunction with the vertical support frame assembly and the heating assembly; the vertical support frame assembly includes a base plate, a fixed plate arranged on an end surface of one end of the base plate, a support column arranged on the fixed plate, a cylinder mounting seat arranged at one end of the support column, a cylinder arranged on the cylinder mounting seat, a support arm connecting seat arranged at one end of the cylinder, a support arm arranged on the support arm connecting seat, and a furnace cover connected to the support arm; the heating assembly includes a vacuum furnace shell arranged on one side of the base plate and located on one side of the fixed plate, a graphite crucible support column arranged in the vacuum furnace shell, and a A graphite crucible is located in the vacuum furnace shell and on the graphite crucible support column, and an insulation layer is arranged between the vacuum furnace shell and the graphite crucible, and an induction coil is arranged between the vacuum furnace shell and the insulation layer; the rotating assembly includes a vertical support frame arranged on one side of the furnace cover, a motor mounting seat arranged on the vertical support frame, a motor installed in the motor mounting seat through bolts, a driving wheel arranged on the motor, a bearing mounting groove arranged in the other side of the furnace cover, a bearing arranged in the bearing mounting groove, a furnace cover through hole arranged on one side of the furnace cover and used in conjunction with the bearing mounting groove, a rotating shaft that passes through the furnace cover, the bearing, and the furnace cover through hole, a driven wheel arranged at one end of the rotating shaft, and a transmission belt respectively connected to the driving wheel and the driven wheel, and a rotor to be tested is installed at the other end of the rotating shaft and located in the graphite crucible.

[0011] In the technical solution, the high-speed rotation creep test device for the power station turbine rotor also includes a first fixing nut and a second fixing nut which are arranged at both ends of the rotating shaft and used in conjunction with the furnace cover, and a semicircular sealing gasket which is arranged on one side of the furnace cover and used in conjunction with the second fixing nut.

[0012] In the technical solution, the high-speed rotation creep test device for the power station steam turbine rotor also includes a sealing ring arranged on one side of the furnace cover and used in conjunction with the vacuum furnace shell.

[0013] In the technical solution, the high-speed rotation creep test device for the power plant turbine rotor also includes a circular limit ear plate arranged on the upper outer wall of the vacuum furnace shell, a limit through groove arranged in the outer wall of the circular limit ear plate, a plurality of limit screws arranged on the edge of one side of the furnace cover, and a limit screw locking nut arranged at one end of the limit screw.

[0014] In the technical solution, the high-speed rotation creep test device for the power plant turbine rotor also includes a circular fixing seat arranged at the other end of the rotating shaft, and a plurality of circular fixing seat screw holes arranged within the edge of the circular fixing seat, and connecting screws respectively passing through the circular fixing seat screw holes, and a connecting screw locking nut arranged at one end of the connecting screw, and a limit plate arranged at the other end of the connecting screw, and a rotor fixing screw arranged on one side of the limit plate, and a rotor fixing screw locking nut arranged at one end of the rotor fixing screw.

[0015] In the technical solution, the support arm is configured as an n-shaped structure, and a reinforced inclined support plate is provided on the n-shaped structure support arm.

[0016] Another aspect of the present invention provides a test method for a high-speed rotating creep test device for a power plant turbine rotor, comprising the following steps: Step 1, fasten a plurality of rotors to be tested on a rotor fixing screw and a limit plate and use a rotor fixing screw locking nut to fix the connecting screw on a circular fixing seat through a connecting screw locking nut and a circular fixing seat screw hole. Step 2, control the cylinder to move downward, and the support arm links the furnace cover to move synchronously downward and contact and seal with the vacuum furnace shell. Step 3, heat the graphite crucible in the vacuum furnace shell through an induction coil. Step 4, start the motor 19, and drive the shaft to rotate at high speed through the driving wheel, the driven wheel, and the transmission belt. At this time, the shaft drives a plurality of rotors to be tested on the circular fixing seat and the limit plate.

[0017] In the technical solution, in step 3, the induction coil heats the graphite crucible in the vacuum furnace shell to 550 degrees Celsius-600 degrees Celsius.

[0018] Compared with the prior art, the high-speed rotation creep test device and test method for a power plant turbine rotor of the present invention have the following beneficial effects: 1. The overall structural design is reasonable, which is convenient for performing a real high-speed rotation creep test on the turbine rotor, performing structural strength and composite fatigue life model verification on the high-speed rotation creep, completing life prediction and analysis, and improving the safety of power plant turbine operation; 2. Auxiliary testing and analysis can be performed on the production and manufacture of turbine rotors. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a high-speed rotation creep test device for a power station steam turbine rotor according to the present invention;

[0020] Figure 2 It is a structural schematic diagram of a circular fixing seat, a plurality of circular fixing seat screw holes, a connecting screw, a connecting screw locking nut, a limiting plate, etc. of a high-speed rotation creep test device for a power station steam turbine rotor of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0022] Embodiment 1

[0023] like Figure 1 and Figure 2 The high-speed rotation creep test device for a power plant turbine rotor shown in the figure is composed of a vertical support frame assembly, a heating assembly used in conjunction with the vertical support frame assembly, and a rotating assembly used in conjunction with the vertical support frame assembly and the heating assembly; the vertical support frame assembly includes a base plate 1, a fixed plate 9 arranged on an end surface of one end of the base plate 1, a support column 10 arranged on the fixed plate 9, a cylinder mounting seat 11 arranged at one end of the support column 10, a cylinder 12 arranged on the cylinder mounting seat 11, a support arm connecting seat 13 arranged at one end of the cylinder 12, a support arm 14 arranged on the support arm connecting seat 13, and a furnace cover 16 connected to the support arm 14; the heating assembly includes a vacuum furnace shell 2 arranged on one side of the base plate 1 and located on one side of the fixed plate 9, a graphite crucible support column 3 arranged in the vacuum furnace shell 2, and a graphite crucible support column 3 arranged in the vacuum furnace shell 2. A graphite crucible 4, and an insulation layer 5 arranged between the vacuum furnace shell 2 and the graphite crucible 4, and an induction coil 6 arranged between the vacuum furnace shell 2 and the insulation layer 5; the rotating assembly includes a vertical support frame 17 arranged on one side of the furnace cover 16, and a motor mounting seat 18 arranged on the vertical support frame 17, and a motor 19 mounted in the motor mounting seat 18 through bolts 20, and a driving wheel 21 arranged on the motor 19, and a bearing mounting groove 22 arranged in the other side of the furnace cover 16, and a bearing 23 arranged in the bearing mounting groove 22, and a furnace cover through hole 28 arranged on one side of the furnace cover 16 and used in conjunction with the bearing mounting groove 22, and a rotating shaft 24 that passes through the furnace cover 16, the bearing 23, and the furnace cover through hole 28, and a driven wheel 25 arranged at one end of the rotating shaft 24, and a transmission belt 26 respectively connected to the driving wheel 21 and the driven wheel 25, and the rotor to be tested is installed at the other end of the rotating shaft 24 and is located in the graphite crucible 4.

[0024] Embodiment 2

[0025] like Figure 1 and Figure 2The high-speed rotation creep test device for a power plant turbine rotor shown in the figure is composed of a vertical support frame assembly, a heating assembly used in conjunction with the vertical support frame assembly, and a rotating assembly used in conjunction with the vertical support frame assembly and the heating assembly; the vertical support frame assembly includes a bottom plate 1, a fixed plate 9 arranged on an end face of one end of the bottom plate 1, a support column 10 arranged on the fixed plate 9, a cylinder mounting seat 11 arranged at one end of the support column 10, a cylinder 12 arranged on the cylinder mounting seat 11, a support arm connecting seat 13 arranged at one end of the cylinder 12, a support arm 14 arranged on the support arm connecting seat 13, and a furnace cover 16 connected to the support arm 14; the heating assembly includes a vacuum furnace shell 2 arranged on one side of the bottom plate 1 and located on one side of the fixed plate 9, a graphite crucible support column 3 arranged in the vacuum furnace shell 2, a graphite crucible 4 arranged in the vacuum furnace shell 2 and located on the graphite crucible support column 3, an insulation layer 5 arranged between the vacuum furnace shell 2 and the graphite crucible 4, and a heat preservation layer 5 arranged in the vacuum furnace shell 2. The induction coil 6 between the shell 2 and the insulation layer 5; the rotating assembly includes a vertical support frame 17 arranged on one side of the furnace cover 16, a motor mounting seat 18 arranged on the vertical support frame 17, a motor 19 mounted in the motor mounting seat 18 by bolts 20, a driving wheel 21 arranged on the motor 19, a bearing mounting groove 22 arranged in the other side of the furnace cover 16, a bearing 23 arranged in the bearing mounting groove 22, and a furnace cover arranged on one side of the furnace cover 16 and used in conjunction with the bearing mounting groove 22 A through hole 28, a rotating shaft 24 that passes through the furnace cover 16, the bearing 23, and the furnace cover through hole 28, a driven wheel 25 arranged at one end of the rotating shaft 24, and a transmission belt 26 respectively connected to the driving wheel 21 and the driven wheel 25, the rotor to be tested is installed at the other end of the rotating shaft 24 and is located in the graphite crucible 4, and a first fixing nut 27 and a second fixing nut 29 are arranged at both ends of the rotating shaft 24 and used in conjunction with the furnace cover 16, and a semicircular sealing gasket 30 is arranged on one side of the furnace cover 16 and used in conjunction with the second fixing nut 29.

[0026] Embodiment 3

[0027] like Figure 1 and Figure 2The high-speed rotation creep test device for a power plant turbine rotor shown in the figure is composed of a vertical support frame assembly, a heating assembly used in conjunction with the vertical support frame assembly, and a rotating assembly used in conjunction with the vertical support frame assembly and the heating assembly; the vertical support frame assembly includes a base plate 1, a fixing plate 9 arranged on an end surface of one end of the base plate 1, a support column 10 arranged on the fixing plate 9, a cylinder mounting seat 11 arranged at one end of the support column 10, a cylinder 12 arranged on the cylinder mounting seat 11, and a rotating assembly arranged on the cylinder 12 The heating assembly comprises a support arm connecting seat 13 at one end, a support arm 14 arranged on the support arm connecting seat 13, and a furnace cover 16 connected to the support arm 14; the heating assembly comprises a vacuum furnace shell 2 arranged on one side of the bottom plate 1 and located on one side of the fixing plate 9, a graphite crucible supporting column 3 arranged in the vacuum furnace shell 2, a graphite crucible 4 arranged in the vacuum furnace shell 2 and located on the graphite crucible supporting column 3, a heat preservation layer 5 arranged between the vacuum furnace shell 2 and the graphite crucible 4, and an induction coil arranged between the vacuum furnace shell 2 and the heat preservation layer 5 6; The rotating assembly includes a vertical support frame 17 arranged on one side of the furnace cover 16, a motor mounting seat 18 arranged on the vertical support frame 17, a motor 19 mounted in the motor mounting seat 18 by bolts 20, a driving wheel 21 arranged on the motor 19, a bearing mounting groove 22 arranged in the other side of the furnace cover 16, a bearing 23 arranged in the bearing mounting groove 22, a furnace cover through hole 28 arranged on one side of the furnace cover 16 and used in conjunction with the bearing mounting groove 22, and a through hole 28 that penetrates the furnace cover 16, the bearing 23, and the furnace cover through hole 2 8, and a driven wheel 25 arranged at one end of the rotating shaft 24, and a transmission belt 26 connected to the driving wheel 21 and the driven wheel 25 respectively, the rotor to be tested is installed at the other end of the rotating shaft 24 and is located in the graphite crucible 4, and a first fixing nut 27 and a second fixing nut 29 arranged at both ends of the rotating shaft 24 and used in conjunction with the furnace cover 16, and a semicircular sealing gasket 30 arranged on one side of the furnace cover 16 and used in conjunction with the second fixing nut 29, and a sealing ring 31 arranged on one side of the furnace cover 16 and used in conjunction with the vacuum furnace shell 2.

[0028] Embodiment 4

[0029] like Figure 1 and Figure 2The high-speed rotation creep test device for a power plant turbine rotor shown in the figure is composed of a vertical support frame assembly, a heating assembly used in conjunction with the vertical support frame assembly, and a rotating assembly used in conjunction with the vertical support frame assembly and the heating assembly; the vertical support frame assembly includes a base plate 1, a fixing plate 9 arranged on an end surface of one end of the base plate 1, a support column 10 arranged on the fixing plate 9, a cylinder mounting seat 11 arranged at one end of the support column 10, a cylinder 12 arranged on the cylinder mounting seat 11, a support arm connecting seat 13 arranged at one end of the cylinder 12, and a support arm connecting seat 13 arranged at the support arm connecting seat 1 3, and a furnace cover 16 connected to the support arm 14; the heating component includes a vacuum furnace shell 2 arranged on one side of the bottom plate 1 and located on one side of the fixed plate 9, and a graphite crucible support column 3 arranged in the vacuum furnace shell 2, and a graphite crucible 4 arranged in the vacuum furnace shell 2 and located on the graphite crucible support column 3, and a heat preservation layer 5 arranged between the vacuum furnace shell 2 and the graphite crucible 4, and an induction coil 6 arranged between the vacuum furnace shell 2 and the heat preservation layer 5; the rotating component includes a vertical support frame 17 arranged on one side of the furnace cover 16, and a motor mounting seat arranged on the vertical support frame 17 18, and a motor 19 installed in the motor mounting seat 18 by bolts 20, and a driving wheel 21 arranged on the motor 19, and a bearing mounting groove 22 arranged in the other side of the furnace cover 16, and a bearing 23 arranged in the bearing mounting groove 22, and a furnace cover through hole 28 arranged on one side of the furnace cover 16 and used in conjunction with the bearing mounting groove 22, and a rotating shaft 24 passing through the furnace cover 16, the bearing 23, and the furnace cover through hole 28, and a driven wheel 25 arranged at one end of the rotating shaft 24, and a transmission belt 26 respectively connected to the driving wheel 21 and the driven wheel 25, and the rotor to be tested is installed at the other end of the rotating shaft 24 and located at the graphite Inside the crucible 4, there are a first fixing nut 27 and a second fixing nut 29 which are arranged at both ends of the rotating shaft 24 and used in conjunction with the furnace cover 16, a semicircular sealing gasket 30 which is arranged on one side of the furnace cover 16 and used in conjunction with the second fixing nut 29, a sealing ring 31 which is arranged on one side of the furnace cover 16 and used in conjunction with the vacuum furnace shell 2, a circular limiting ear plate 7 which is arranged on the upper outer wall of the vacuum furnace shell 2, a limiting through groove 8 which is arranged in the outer wall of the circular limiting ear plate 7, a plurality of limiting screws 39 which are arranged on the edge of one side of the furnace cover 16, and a limiting screw locking nut 40 which is arranged at one end of the limiting screw 39.

[0030] Embodiment 5

[0031] like Figure 1 and Figure 2The high-speed rotation creep test device for a power plant turbine rotor shown in the figure is composed of a vertical support frame assembly, a heating assembly used in conjunction with the vertical support frame assembly, and a rotating assembly used in conjunction with the vertical support frame assembly and the heating assembly; the vertical support frame assembly includes a base plate 1, a fixing plate 9 arranged on an end face of one end of the base plate 1, a support column 10 arranged on the fixing plate 9, a cylinder mounting seat 11 arranged at one end of the support column 10, a cylinder 12 arranged on the cylinder mounting seat 11, a support arm connecting seat 13 arranged at one end of the cylinder 12, a support arm 14 arranged on the support arm connecting seat 13, and a furnace cover 16 connected to the support arm 14; the heating assembly includes a base plate 1 arranged on one side of the base plate 1 The vacuum furnace shell 2 is located on one side of the fixed plate 9, and a graphite crucible support column 3 is arranged in the vacuum furnace shell 2, and a graphite crucible 4 is arranged in the vacuum furnace shell 2 and located on the graphite crucible support column 3, and a thermal insulation layer 5 is arranged between the vacuum furnace shell 2 and the graphite crucible 4, and an induction coil 6 is arranged between the vacuum furnace shell 2 and the thermal insulation layer 5; the rotating assembly includes a vertical support frame 17 arranged on one side of the furnace cover 16, and a motor mounting seat 18 arranged on the vertical support frame 17, and a motor 19 installed in the motor mounting seat 18 by bolts 20, and a driving wheel 21 arranged on the motor 19, and a bearing mounting groove 22 arranged in the other side of the furnace cover 16, and a bearing 23 arranged in the bearing mounting groove 22 , and a furnace cover through hole 28 provided on one side of the furnace cover 16 and used in conjunction with the bearing mounting groove 22, and a rotating shaft 24 that passes through the furnace cover 16, the bearing 23, and the furnace cover through hole 28, and a driven wheel 25 provided at one end of the rotating shaft 24, and a transmission belt 26 respectively connected to the driving wheel 21 and the driven wheel 25, the rotor to be tested is installed at the other end of the rotating shaft 24 and is located in the graphite crucible 4, and a first fixing nut 27 and a second fixing nut 29 provided at both ends of the rotating shaft 24 and used in conjunction with the furnace cover 16, and a semicircular sealing gasket 30 provided on one side of the furnace cover 16 and used in conjunction with the second fixing nut 29, and a sealing ring 31 provided on one side of the furnace cover 16 and used in conjunction with the vacuum furnace shell 2, and a sealing ring 31 provided on the upper part of the vacuum furnace shell 2 A circular limiting ear plate 7 on the outer wall, a limiting through groove 8 arranged in the outer wall of the circular limiting ear plate 7, a plurality of limiting screws 39 arranged on the edge of one side of the furnace cover 16, a limiting screw locking nut 40 arranged at one end of the limiting screw 39, a circular fixing seat 32 arranged at the other end of the rotating shaft 24, a plurality of circular fixing seat screw holes 33 arranged in the edge of the circular fixing seat 32, and connecting screws 34 respectively passing through the circular fixing seat screw holes 33, and a connecting screw locking nut 35 arranged at one end of the connecting screw 34, and a limiting plate 36 arranged at the other end of the connecting screw 34, and a rotor fixing screw 37 arranged on one side of the limiting plate 36, and a rotor fixing screw locking nut 38 arranged at one end of the rotor fixing screw 37.

[0032] Preferably, in the high-speed rotation creep testing device for a power plant turbine rotor of the structural embodiments 1 to 5, the support arm 14 is configured as an n-shaped structure, and a reinforcing inclined support plate 15 is provided on the n-shaped structure support arm 14.

[0033] The test method of the high-speed rotation creep test device of the power station steam turbine rotor of the present invention comprises the following steps: step 1, fastening a plurality of rotors to be tested on the rotor fixing screw 37 and the limit plate 36 and using the rotor fixing screw locking nut 38, fixing the connecting screw 34 on the circular fixing seat 32 through the connecting screw locking nut 35 and the circular fixing seat screw hole 33. Step 2, controlling the cylinder 12 to move downward, the supporting arm 14 links the furnace cover 16 to move downward synchronously and contact and seal with the vacuum furnace shell 2. Step 3, heating and raising the temperature of the graphite crucible 4 in the vacuum furnace shell 2 by the induction coil 6. Step 4, starting the motor 19, driving the rotating shaft 24 to rotate at a high speed through the driving wheel 21, the driven wheel 25 and the transmission belt 26, at which time the rotating shaft 24 drives the plurality of rotors to be tested on the circular fixing seat 32 and the limit plate 36.

[0034] As a preferred test method for the high-speed rotation creep test device of the power plant turbine rotor, in the step 3, the induction coil 6 heats the graphite crucible 4 in the vacuum furnace shell 2 to 500 degrees Celsius, 550 degrees Celsius, 570 degrees Celsius, 580 degrees Celsius, and 600 degrees Celsius.

[0035] The testing method of the high-speed rotation creep testing device for power plant turbine rotors of the present structural embodiments 1 to 5 is to take out multiple test rotors after high-temperature rotation, take pictures, record the fracture morphology after low-temperature brittle fracture, and perform analysis and evaluation.

[0036] At the same time, the induction coil 6 of the heating component and the temperature sensor ( Figure 1 Not marked in the figure), the motor 19 is connected to the monitoring simulator respectively, the monitoring simulator receives the initial command input to realize the setting of the test parameters; monitors the heating process, records the temperature change and issues an alarm; collects the test data and draws the test curve; automatically records and saves the data, and can query the historical information of the test data.

[0037] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. High-speed rotation creep test device for power station steam turbine rotor, characterized by: The invention is composed of a vertical support frame assembly, a heating assembly used in conjunction with the vertical support frame assembly, and a rotating assembly used in conjunction with the vertical support frame assembly and the heating assembly; the vertical support frame assembly comprises a base plate (1), a fixing plate (9) arranged on an end surface of one end of the base plate (1), a support column (10) arranged on the fixing plate (9), a cylinder mounting seat (11) arranged at one end of the support column (10), a cylinder (12) arranged on the cylinder mounting seat (11), and a rotating assembly arranged on the cylinder (12). ) at one end of the support arm connecting seat (13), and a support arm (14) arranged on the support arm connecting seat (13), and a furnace cover (16) connected to the support arm (14); the heating component comprises a vacuum furnace shell (2) arranged on one side of the bottom plate (1) and located on one side of the fixing plate (9), and a graphite crucible support column (3) arranged in the vacuum furnace shell (2), and a graphite crucible (4) arranged in the vacuum furnace shell (2) and located on the graphite crucible support column (3), and a graphite crucible (5) arranged in the vacuum furnace shell (2) and located on the graphite crucible support column (3). The invention relates to a vacuum furnace having a heat-insulating layer (5) between the crucibles (4) and an induction coil (6) arranged between the vacuum furnace shell (2) and the heat-insulating layer (5); the rotating assembly comprises a vertical support frame (17) arranged on one side of the furnace cover (16), a motor mounting seat (18) arranged on the vertical support frame (17), a motor (19) mounted in the motor mounting seat (18) by bolts (20), a driving wheel (21) arranged on the motor (19), and a bearing mounting groove (22) arranged in the other side of the furnace cover (16). , and a bearing (23) disposed in a bearing mounting groove (22), and a furnace cover through hole (28) disposed on one side of a furnace cover (16) and used in conjunction with the bearing mounting groove (22), and a rotating shaft (24) penetrating the furnace cover (16), the bearing (23), and the furnace cover through hole (28), and a driven wheel (25) disposed at one end of the rotating shaft (24), and a transmission belt (26) respectively connected to the driving wheel (21) and the driven wheel (25), and the rotor to be tested is mounted at the other end of the rotating shaft (24) and is located in a graphite crucible (4); It also includes a first fixing nut (27) and a second fixing nut (29) which are arranged at both ends of the rotating shaft (24) and used in conjunction with the furnace cover (16), and a semicircular sealing gasket (30) which is arranged on one side of the furnace cover (16) and used in conjunction with the second fixing nut (29); The support arm (14) is configured as an n-shaped structure, and a reinforced oblique support plate (15) is provided on the n-shaped structure support arm (14).

2. The high-speed rotation creep test device for a power plant steam turbine rotor according to claim 1, characterized in that: The high-speed rotation creep test device for a power station steam turbine rotor also includes a sealing ring (31) arranged on one side of a furnace cover (16) and used in conjunction with a vacuum furnace shell (2).

3. The high-speed rotation creep test device for a power plant steam turbine rotor according to claim 2, characterized in that: The high-speed rotation creep test device for a power station steam turbine rotor also includes a circular limiting ear plate (7) arranged on the upper outer wall of the vacuum furnace shell (2), a limiting through groove (8) arranged in the outer wall of the circular limiting ear plate (7), a plurality of limiting screws (39) arranged on the edge of one side of the furnace cover (16), and a limiting screw locking nut (40) arranged at one end of the limiting screw (39).

4. The high-speed rotation creep test device for a power plant steam turbine rotor according to claim 3, characterized in that: The high-speed rotation creep test device for a power station steam turbine rotor also includes a circular fixing seat (32) arranged at the other end of the rotating shaft (24), a plurality of circular fixing seat screw holes (33) arranged in the edge of the circular fixing seat (32), a connecting screw (34) respectively passing through the circular fixing seat screw holes (33), a connecting screw locking nut (35) arranged at one end of the connecting screw (34), a limiting plate (36) arranged at the other end of the connecting screw (34), a rotor fixing screw (37) arranged on one side of the limiting plate (36), and a rotor fixing screw locking nut (38) arranged at one end of the rotor fixing screw (37).

5. The testing method of the high-speed rotation creep testing device for a power plant steam turbine rotor according to claim 4 is characterized in that: The following steps are included: Step 1, fasten a plurality of rotors to be tested on the rotor fixing screws (37) and the limit plate (36), and use the rotor fixing screw locking nuts (38) to fix the connecting screws (34) on the circular fixing seat (32) through the connecting screw locking nuts (35) and the circular fixing seat screw holes (33); Step 2, the cylinder (12) is controlled to move downward, and the support arm (14) is linked with the furnace cover (16) to move downward synchronously and contact and seal with the vacuum furnace shell (2); Step 3, heating the graphite crucible (4) in the vacuum furnace housing (2) by means of an induction coil (6); Step 4, starting the motor (19), driving the rotating shaft (24) to rotate at high speed through the driving wheel (21), the driven wheel (25), and the transmission belt (26), at which time the rotating shaft (24) drives the multiple rotors to be tested on the circular fixed seat (32) and the limit plate (36).

6. The testing method of the high-speed rotation creep testing device for a power station steam turbine rotor according to claim 5, characterized in that: In step 3, the induction coil (6) heats the graphite crucible (4) in the vacuum furnace shell (2) to a temperature of 550 degrees Celsius to 600 degrees Celsius.

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