Elastic support device for deep hole drilling and boring machine of steam turbine rotor

Abstract

The present application relates to the technical field of steam turbine rotor processing, and discloses an elastic supporting device of a steam turbine rotor deep hole drilling and boring machine, which comprises a drag frame and a center frame, the center frame is circumferentially provided with supporting assemblies, each supporting assembly comprises a cylinder body and a piston rod, one end of the piston rod is fixed on a piston that slides in the cylinder body, and the other end of the piston rod is rotatably provided with a center roller; the center frame is further provided with an air compressor, the air compressor is in communication with an air cavity, the air cavity is in communication with a jet pipe and a plurality of gas conveying pipes, the gas outlet of the jet pipe is obliquely directed towards the rotor, and each gas conveying pipe is connected with a telescopic rod in the corresponding piston rod after passing through a lubricating oil tank; a side notch is arranged on the piston rod, an end cover plug is arranged on the position of the cylinder body end cover corresponding to the side notch, and an inner hole is arranged on the position of the center frame shell corresponding to the side notch. The device has the advantages of being capable of removing coolant water stains, accurately conveying lubricating oil without the need of complex external pipelines, improving the stability of the piston rod, and realizing dynamic lubrication enhancement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steam turbine rotor machining, in particular to an elastic supporting device of a steam turbine rotor deep hole drilling and boring machine. BACKGROUND

[0002] In order to meet the cooling, weight reduction and structural optimization requirements of the steam turbine rotor, the steam turbine rotor deep hole drilling and boring machine processes an axial deep hole in the inside thereof, as shown in the accompanying drawings, a deep hole drilling and boring machine commonly used in the prior art, comprising a bed body, a headstock, a chuck, an oil tank, a drill rod and a drill rod seat are sequentially arranged on the upper side of the bed body, the headstock is used to drive the chuck to rotate, the chuck clamps one end of the workpiece, and the other end is located in the oil tank, the drill rod seat is used to push the drill rod to punch on the workpiece. Figure 1

[0003] However, the steam turbine rotor is heavy and long, and an additional supporting device is needed to improve its stability, for example, the patent document with the patent number CN2737492Y discloses a numerical control deep hole drilling and boring machine, which increases a drag frame and a center frame between the chuck and the oil tank to provide support force for the rotor, a plurality of support assemblies are circumferentially arranged on the center frame, each support assembly is composed of a cylinder body fixed to the outer side of the center frame and a piston rod penetrating through the center frame, one end of the piston rod can slide in the cylinder body, and the other end is provided with a center roller to support the rotor through the center roller.

[0004] However, there are still many problems in the prior art that need to be solved. Firstly, during the machining process, the coolant will flow along the lower side of the rotor to the supporting device, and it is easy to flow onto the roller. The presence of the coolant will seriously interfere with the lubrication effect of the roller, and in the long run, the roller will rust due to the lack of effective lubrication, greatly shortening the service life of the roller, and frequent replacement of the roller not only increases the cost, but also reduces the production efficiency. Secondly, for the lubrication of the roller, the current main method is manual spraying of lubricating liquid. Since the roller is arranged on the piston rod, it is impossible to use the piston rod to deliver the lubricating liquid, and if an external lubricating liquid pipeline is used, a very complex structure needs to be designed to achieve this, which undoubtedly increases the complexity and cost of the device, and manual operation cannot guarantee the uniformity and timeliness of lubrication. Thirdly, the steam turbine rotor itself is very heavy, and during the machining process, the piston rod needs to bear a large pressure, the existing structure design makes the stability of the piston rod poor, under the action of long-term high load, the piston rod is easy to deviate, etc., which further affects the supporting precision of the rotor, reduces the machining quality, and even may cause safety accidents. SUMMARY

[0005] (I) Technical problems solved

[0006] ​In view of the deficiencies of the prior art, the present application provides an elastic supporting device of a steam turbine rotor deep hole drilling and boring machine, which has the advantages of being capable of removing coolant water stains, accurately delivering lubricating oil without the need for complex external pipelines, improving the stability of the piston rod and achieving dynamic lubrication enhancement, and solves the problems of coolant affecting roller lubrication and causing rust, manual operation or complex external pipelines for roller lubrication, and insufficient stability of the piston rod under stress.

[0007] (II) Technical solutions

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0009] An elastic supporting device of a steam turbine rotor deep hole drilling and boring machine, comprising a drag frame and a center frame for supporting the rotor, wherein at least three supporting assemblies are circumferentially arranged on the center frame, each supporting assembly comprising a cylinder fixed to the outer side of the center frame and a piston rod penetrating the center frame, one end of the piston rod being fixed to a piston sliding in the cylinder and the other end of the piston rod being rotatably installed with a center roller, a cylinder end cover being arranged between the cylinder and the center frame, and the piston rod penetrating the cylinder end cover;

[0010] An air compressor is further arranged on the center frame, the air outlet of the air compressor being in communication with an air cavity in the center frame, the air cavity being in communication with a jet pipe and a plurality of gas delivery pipes, the air outlet of the jet pipe being inclined towards the rotor, and each gas delivery pipe being connected to a telescopic rod in the corresponding piston rod after passing through a lubricating oil tank;

[0011] A side notch is arranged on the piston rod, the telescopic rod is installed in the side notch, the port of the telescopic rod is aligned with the center roller, an end cover plug is arranged on the cylinder end cover at a position corresponding to the side notch, and an inner hole is arranged on the center frame shell at a position corresponding to the side notch.

[0012] Preferably, the side notch comprises an inner hole at the central axis of the piston rod and an outer groove connecting the inner hole with the outer wall of the piston rod, the inner hole penetrates the upper and lower ends of the piston rod, and one end of the outer groove penetrates one end of the piston rod in the cylinder and the other end is located inside the piston rod.

[0013] Preferably, a movable end is arranged on the end of the piston rod close to the center roller, the center roller is rotatably installed on the movable end, an adjustable nozzle is arranged at the connection between the inner hole in the movable end and the inner hole of the piston rod, and the adjustable nozzle comprises:

[0014] A plug is fixed in the inner hole of the movable end, an inclined sharp bottom is arranged at one end of the plug away from the center roller, and the width of the inclined sharp bottom becomes narrower as it is farther away from the movable end.

[0015] The sleeve is fixed at one end in the inner hole of the piston rod end, and is slidably inserted at the other end in the inner hole of the movable end head, the sleeve is provided with a liquid outlet at one end close to the insert, and the liquid outlet is narrower at a position further away from the movable end head.

[0016] Preferably, the telescopic rod is composed of multiple sub-rods, each sub-rod is sleeved with the adjacent sub-rod, and a limiting ring is arranged at the end of the sub-rod to prevent falling off, the outer diameter of each sub-rod increases successively from the gas conveying pipe to the center roller, and the sub-rod close to the center roller at one end in the telescopic rod is slidably connected in the inner hole;

[0017] A pressure measuring channel is arranged in the inner hole for slidably connecting the sub-rod close to the center roller at one end, a pressure measuring device is arranged in the pressure measuring channel, a pressure sensor for detecting the pressure in the inner hole is arranged on the pressure measuring device, an electromagnetic valve is also arranged on the pressure measuring device, and the other end of the pressure measuring device is communicated to one end of the outer groove in the piston rod, and the gas flow with lubricating liquid in the inner hole is discharged into the outer groove through the pressure measuring device.

[0018] Preferably, a sealed cavity is arranged between the movable end head and the end of the piston rod, the sealed cavity is located at the contact surface between the movable end head and the piston rod, the sealed cavity is isolated from the inner hole by the sleeve, and the movable end head is provided with elasticity by arranging high-pressure gas or spring in the sealed cavity.

[0019] Preferably, the sleeve is provided with a liquid inlet at the end away from the insert, and the liquid inlet is wider at a position further away from the insert.

[0020] Preferably, the steam turbine rotor deep hole drilling and boring machine comprises a bed body, a head box, a chuck, an oil supply tank, a drill rod and a drill rod seat are sequentially arranged on the bed body, a drag bracket and a center bracket are arranged on the bed body, and the drag bracket and the center bracket are located between the chuck and the oil supply tank.

[0021] Preferably, the drag bracket comprises a drag bracket tray slidably arranged on the bed body, two symmetrical drag bracket seats are slidably arranged on the drag bracket tray, a drag bracket roller is rotatably arranged on the drag bracket seat, and the sliding direction of the drag bracket seat is perpendicular to the sliding direction of the drag bracket tray.

[0022] Preferably, the center bracket comprises a lower bracket body and an upper bracket body, the lower bracket body is fixedly installed on a center bracket tray, the center bracket tray is slidably arranged on the bed body, and an air compressor is also installed on the center bracket tray.

[0023] The lower bracket body is U-shaped, the upper bracket body is rotatably connected to the top of the lower bracket body, two piston rods are arranged on the lower bracket body, one piston rod is arranged on the upper bracket body, and a locking device is further arranged between the lower bracket body and the upper bracket body.

[0024] Preferably, the center frame is provided with a shell plug at the position corresponding to the side slot.

[0025] (Three) beneficial effects

[0026] Compared with the prior art, the elastic support device of the steam turbine rotor deep hole drilling and boring machine has the following beneficial effects:

[0027] 1. The elastic support device of the steam turbine rotor deep hole drilling and boring machine, by setting an air compressor on the center frame, first, the air compressor sprays high-pressure airflow through the air jet pipe, and the compressed gas of the air compressor removes the coolant water stains on the rotor; secondly, the air compressor is also connected to the gas delivery pipe, which is connected to the telescopic rod in the side slot and sprays the airflow containing lubricating oil to the center roller, which can accurately control the amount of lubricating oil through the airflow, avoid waste and pollution of lubricating oil, and the lubricating oil carried by the compressed air can form a uniform oil film at the contact part of the center roller and the rotor, effectively reducing friction and wear, and under the action of the telescopic rod, when the rotor shakes and presses the piston rod, the telescopic rod is compressed, which can instantly increase the liquid output of the lubricating liquid; finally, the cooperation of the side slot and the end cover plug not only seals the cylinder body, but also stabilizes the piston rod, preventing the piston rod from deviating, that is, through the cooperation of the air compressor and the piston rod, the four effects of removing water stains, delivering lubricating oil, improving the stability of the piston rod and enhancing dynamic lubrication are realized.

[0028] 2. The elastic support device of the steam turbine rotor deep hole drilling and boring machine, by setting a movable end on the end of the piston rod and an adjustable nozzle on the end of the inner hole, first, the high-speed airflow containing lubricating liquid is uniformly sprayed on the center roller by the insert and the sleeve; secondly, when the rotor shakes violently, the movable end slides towards the piston rod, causing the insert to insert into the sleeve, at which time the adjustable nozzle is completely blocked, preventing the piston rod from retracting too much into the cylinder body, and the sliding of the movable end on the piston rod and the sliding of the insert into the sleeve provide elastic buffering for the rotor.

[0029] 3. The elastic support device of the steam turbine rotor deep hole drilling and boring machine, by setting a pressure measuring channel on the side wall of the inner hole end, and setting a pressure measuring device in the pressure measuring channel, first, the pressure measuring device can be used to detect the air pressure at the inner hole end position, so that the oil injection pressure can be kept balanced by adjusting the output pressure of the air compressor or the opening size of the electromagnetic valve on the gas delivery pipe; secondly, when the pressure measuring channel is connected to the inner hole, that is, the sub-rod end does not cover the pressure measuring channel, that is, the piston rod extends a distance, at which time the exposed area of the outer groove outside the center frame is large, a part of the oil is sprayed into the outer groove by opening the electromagnetic valve of the pressure measuring device, improving the lubrication degree of the outer groove. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1The figure is a structural schematic diagram of a deep hole drilling and boring machine for a steam turbine rotor in the prior art.

[0031] Figure 2 The figure is a structural schematic diagram of a deep hole drilling and boring machine for a steam turbine rotor in the prior embodiment, in which the upper frame body is in the closed state.

[0032] Figure 3 The figure is a structural schematic diagram of a deep hole drilling and boring machine for a steam turbine rotor in the prior embodiment, in which the upper frame body is in the open state.

[0033] Figure 4 The figure is a structural schematic diagram of a drag frame in the prior embodiment.

[0034] Figure 5 The figure is a structural schematic diagram of a center frame in the prior embodiment, in which the upper frame body is in the open state.

[0035] Figure 6 The figure is a structural schematic diagram of a center frame in the prior embodiment, in which the upper frame body is in the closed state.

[0036] Figure 7 The figure is a structural schematic diagram of the inside of a center frame in the prior embodiment.

[0037] Figure 8 The figure is a sectional view of a center frame in the prior embodiment.

[0038] Figure 9 The figure is a structural schematic diagram of a lower frame body in the prior embodiment.

[0039] Figure 10 The figure is a structural schematic diagram of a support assembly in the prior embodiment.

[0040] Figure 11 The figure is a structural schematic diagram of the cooperation of a gas conveying pipe and an extension rod in the prior embodiment.

[0041] Figure 12 The figure is a structural schematic diagram of a support assembly in the second embodiment.

[0042] Figure 13 The figure is a sectional view of a support assembly in the second embodiment.

[0043] Figure 14 The figure is a sectional view of a support assembly in the second embodiment. Figure 13 The figure is a partial enlarged view of region A in the second embodiment.

[0044] Figure 15 The figure is a partial schematic diagram of the connection between a piston rod and a movable end head in the second embodiment.

[0045] Figure 16 The figure is a structural schematic diagram of the cooperation of a plug and a sleeve in the second embodiment, in which the movable end head is compressed by the rotor towards the piston rod.

[0046] Figure 17 Figure 2 is a schematic view of the structure of the plug and sleeve of the second embodiment of the present application, in which the movable end is away from the piston rod.

[0047] Figure 18 Figure 3 is a schematic view of the structure of the B region of the second embodiment of the present application. Figure 13 Figure 4 is a partial enlarged view of the B region of the second embodiment of the present application.

[0048] Figure 19 Figure 5 is a schematic view of the top of the outer groove on the piston rod of the second embodiment of the present application.

[0049] Figure 1 is a schematic view of the structure of the drilling machine of the present application. In the figure: 11, bed body; 12, headstock; 13, chuck; 14, oil supply tank; 15, drill rod; 19, drill rod seat; 16, rotor; 17, drag carriage; 18, center carriage; 171, drag carriage roller; 172, drag carriage seat; 173, drag carriage tray; 181, lower carriage body; 182, upper carriage body; 183, center carriage tray; 1811, housing plug; 2, air compressor; 21, air cavity; 22, air jet pipe; 23, air delivery pipe; 3, piston rod; 31, side slot; 311, inner hole; 312, outer groove; 32, telescopic rod; 321, sub-rod; 33, center roller; 34, movable end; 35, pressure measuring channel; 36, pressure measuring device; 4, cylinder body; 41, cylinder body end cover; 411, end cover plug; 42, piston; 5, lubricating oil tank; 6, adjustable nozzle; 61, plug; 611, inclined pointed bottom; 62, sleeve; 621, liquid outlet; 622, liquid inlet. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0051] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0052] In addition, the fixed connection refers to the connection of the parts or components after being fixed without any relative movement; the transmission connection refers to a connection mode of transmitting mechanical movement or torque to other working components through a transmission part; the sliding connection refers to a connection mode that two objects are in contact but not fixed, and the two objects can slide relative to each other; and the rotating connection refers to a connection mode that two objects are in contact but not fixed, and the two objects can rotate relative to each other.

[0053] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0054] Embodiment one:

[0055] The embodiment provides a resilient supporting device of a steam turbine rotor deep hole drilling and boring machine, which has the following technical features.

[0056] Please refer to Figures 1-11 A resilient supporting device of a steam turbine rotor deep hole drilling and boring machine, comprising a drag frame 17 and a center frame 18 for supporting a rotor 16, at least three supporting assemblies are circumferentially arranged on the center frame 18, each supporting assembly comprises a cylinder body 4 fixed outside the center frame 18 and a piston rod 3 penetrating the center frame 18, one end of the piston rod 3 is fixed on a piston 42 sliding in the cylinder body 4, and the other end is rotatably installed with a center roller 33, a cylinder end cover 41 is arranged between the cylinder body 4 and the center frame 18, and the piston rod 3 penetrates from the cylinder end cover 41;

[0057] The center frame 18 is also provided with an air compressor 2, the air outlet of the air compressor 2 is communicated with an air cavity 21 in the center frame 18, the air cavity 21 is communicated with a jet pipe 22 and a plurality of gas conveying pipes 23, the air outlet of the jet pipe 22 is inclined towards the rotor 16, and each gas conveying pipe 23 is connected with an extension rod 32 in the corresponding piston rod 3 after passing through a lubricating oil tank 5;

[0058] The piston rod 3 is provided with a side notch 31, the extension rod 32 is installed in the side notch 31, the port of the extension rod 32 is aligned with the center roller 33, the cylinder end cover 41 is provided with an end cover plug 411 corresponding to the position of the side notch 31, and the center frame 18 shell is provided with an inner hole 311 corresponding to the position of the side notch 31.

[0059] According to the above improvement, by setting the air compressor 2 on the center frame 18, first, the air compressor 2 sprays high-pressure airflow through the air jet pipe 22, and the compressed gas of the air compressor 2 removes the coolant water stains on the rotor 16; second, the air compressor 2 is also connected to the air supply pipe 23, which is connected to the telescopic rod 32 in the side notch 31 and sprays the airflow containing lubricating oil to the center roller 33, so that the amount of lubricating oil can be accurately controlled through the airflow, avoiding waste and pollution of the lubricating oil, and the lubricating oil carried by the compressed air can form a uniform oil film at the contact position of the center roller 33 and the rotor 16, effectively reducing friction and wear; and, under the action of the telescopic rod 32, when the rotor 16 shakes and presses the piston rod 3, the telescopic rod 32 is compressed, which can instantaneously increase the liquid output of the lubricating liquid; finally, the cooperation of the side notch 31 and the end cover plug-in block 411 not only plays a sealing role on the cylinder body 4, but also plays a stabilizing role on the piston rod 3, preventing the piston rod 3 from deviating, that is, through the cooperation of the air compressor 2 and the piston rod 3, the four effects of removing water stains, transporting lubricating oil, improving the stability of the piston rod, and enhancing dynamic lubrication are realized at the same time.

[0060] Further provided, the center frame 18 is provided with a controller.

[0061] Further provided, the cylinder body 4 is connected to a hydraulic oil supply pipeline, and the controller controls the input or output of hydraulic oil in the cylinder body 4 to control the sliding of the piston 42 in the cylinder body 4.

[0062] Further provided, the air cavity 21 is provided with an electromagnetic valve at the connection position of the air jet pipe 22 and each air supply pipe 23, and the electromagnetic valve is electrically connected to the controller.

[0063] Further provided, the oil outlet of the lubricating oil tank 5 is connected to the air supply pipe 23, and the oil outlet of the lubricating oil tank 5 is provided with a flow regulating valve for accurately controlling the output of the lubricating oil, and the flow regulating valve is electrically connected to the controller, and the controller controls the opening and closing of the flow regulating valve, and the electromagnetic valve of the air supply pipe 23 is opened at the same time to make the high-speed airflow in the air supply pipe 23 pass through the oil outlet of the lubricating oil tank 5, thereby carrying out the lubricating oil.

[0064] Further provided, the end cover plug-in block 411 is provided with a sealing ring at the contact position with the side notch 31.

[0065] Further provided, the lubricating oil tank 5 is provided with an oil level monitoring device, which can issue an alarm when the oil level is below a set value, reminding timely supplement of lubricating oil, and the oil level monitoring device is electrically connected to the controller.

[0066] In an alternative embodiment, the side slot 31 comprises an inner hole 311 at the shaft of the piston rod 3 and an outer slot 312 connecting the inner hole 311 with the outer wall of the piston rod 3, the inner hole 311 penetrates the piston rod 3 at both ends, and one end of the outer slot 312 penetrates the piston rod 3 at the end inside the cylinder body 4, and the other end is inside the piston rod 3.

[0067] In an alternative embodiment, the steam turbine rotor deep hole drilling and boring machine comprises a bed body 11, a head box 12, a chuck 13, an oil supply box 14, a drill rod 15 and a drill rod seat 19 are sequentially arranged on the bed body 11, and the trolley 17 and the center frame 18 are arranged on the bed body 11, and the trolley 17 and the center frame 18 are located between the chuck 13 and the oil supply box 14.

[0068] In an alternative embodiment, the trolley 17 comprises a trolley tray 173 slidingly arranged on the bed body 11, two symmetrical trolley seats 172 are slidingly arranged on the trolley tray 173, trolley rollers 171 are rotatably arranged on the trolley seats 172, and the sliding direction of the trolley seats 172 is perpendicular to the sliding direction of the trolley tray 173.

[0069] In an alternative embodiment, the center frame 18 comprises a lower frame body 181 and an upper frame body 182, the lower frame body 181 is fixedly installed on the center frame tray 183, the center frame tray 183 is slidingly arranged on the bed body 11, and the air compressor 2 is also installed on the center frame tray 183.

[0070] The lower frame body 181 is U-shaped, the upper frame body 182 is rotatably connected to the top of the lower frame body 181, two piston rods 3 are arranged on the lower frame body 181, one piston rod 3 is arranged on the upper frame body 182, and a locking device is further arranged between the lower frame body 181 and the upper frame body 182.

[0071] In an alternative embodiment, the center frame 18 is provided with a shell plug 1811 at a position corresponding to the side slot 31.

[0072] Further, the bed body 11 is provided with guide rails, the trolley tray 173 and the center frame tray 183 are provided with sliding blocks matched with the guide rails at the bottom, and the sliding blocks are provided with locking devices.

[0073] Further, the locking device comprises a lock catch arranged on the lower frame body 181 and a lock hook arranged on the upper frame body 182, the lock catch is matched with the lock hook, and the lock catch is provided with an adjusting bolt for adjusting the locking degree.

[0074] Further, the center roller 33 is provided with a wear-resistant coating on the surface, and the wear-resistant coating is a tungsten carbide coating.

[0075] Further provided, the air compressor 2 outlet is provided with a flow controller, the flow controller is electrically connected with the controller, for adjusting the pressure of the air compressor 2 output gas.

[0076] Embodiment two:

[0077] The embodiment provides a resilient supporting device of a steam turbine rotor deep hole drilling and boring machine, in addition to comprising the technical scheme of the above embodiment, further has the following technical features.

[0078] Please refer to Figures 12-19 In an alternative embodiment, the piston rod 3 is provided with a movable end 34 at the end close to the center roller 33, the center roller 33 is rotatably installed on the movable end 34, and the inner hole 311 in the movable end 34 is provided with an adjustable nozzle 6 at the connection with the inner hole 311 of the piston rod 3, the adjustable nozzle 6 comprises:

[0079] The insert 61 is fixed in the inner hole 311 of the movable end 34, and the insert 61 is provided with an inclined tip 611 at the end away from the center roller 33, the width of the inclined tip 611 is narrower at the position farther away from the movable end 34.

[0080] The sleeve 62 is fixed in the inner hole 311 at one end of the piston rod 3 and is slidably inserted into the inner hole 311 of the movable end 34 at the other end, and the sleeve 62 is provided with a liquid outlet 621 at the end close to the insert 61, the width of the liquid outlet 621 is narrower at the position farther away from the movable end 34.

[0081] According to the above improvement, by providing the movable end 34 at the end of the piston rod 3 and the adjustable nozzle 6 at the end of the inner hole 311, first, the insert 61 and the sleeve 62 are used to uniformly spray high-speed airflow with lubricating liquid on the center roller 33; second, when the rotor 16 shakes violently, the movable end 34 is pushed to slide towards the piston rod 3, so that the insert 61 is inserted into the sleeve 62, at this time, the adjustable nozzle 6 can be completely blocked, avoiding excessive contraction of the piston rod 3 into the cylinder body 4, and the sliding of the movable end 34 on the piston rod 3 and the sliding of the insert 61 inserted into the sleeve 62 both provide elastic buffering for the rotor 16.

[0082] In an alternative embodiment, the telescopic rod 32 is composed of multiple sub-rods 321, each sub-rod 321 is sleeved with the adjacent sub-rod 321, and a limiting ring is arranged at the end of the sub-rod 321 to prevent falling off, the outer diameter of each sub-rod 321 increases in sequence from the gas conveying pipe 23 to the center roller 33, and the sub-rod 321 close to the center roller 33 at one end in the telescopic rod 32 is slidably connected in the inner hole 311;

[0083] In the inner hole 311 of the sub-rod 321 closest to the center roller 33, a pressure measuring channel 35 is arranged, and a pressure measuring device 36 is arranged in the pressure measuring channel 35. The pressure measuring device 36 is provided with a pressure sensor for detecting the pressure in the inner hole 311, and is also provided with an electromagnetic valve. The other end of the pressure measuring device 36 is connected to one end of the outer groove 312 in the piston rod 3. The air flow with lubricating liquid in the inner hole 311 is discharged into the outer groove 312 through the pressure measuring device 36.

[0084] According to the above improvement, by arranging the pressure measuring channel 35 in the side wall of the end of the inner hole 311, and arranging the pressure measuring device 36 in the pressure measuring channel 35, first, the pressure measuring device 36 can be used to detect the air pressure at the end of the inner hole 311, so that the oil injection pressure can be kept balanced by adjusting the output pressure of the air compressor 2 or the opening size of the electromagnetic valve on the air pipe 23; second, when the pressure measuring channel 35 is connected to the inner hole 311, that is, the end of the sub-rod 321 does not cover the pressure measuring channel 35, that is, the piston rod 3 extends a distance, at this time the exposed area of the outer groove 312 outside the center frame 18 is large, and by opening the electromagnetic valve of the pressure measuring device 36, a part of the oil is injected into the outer groove 312, improving the lubrication of the outer groove 312.

[0085] Further, the pressure sensor of the pressure measuring device 36 and the electromagnetic valve of the pressure measuring device 36 are respectively electrically connected to the controller.

[0086] Further, the end of the outer groove 312 in the piston rod 3 is provided with an inclined chamfer, so that the oil flows better to the side wall of the outer groove 312.

[0087] In an optional embodiment, a sealed cavity is arranged between the movable end 34 and the end of the piston rod 3, and the sealed cavity is located at the contact surface of the movable end 34 and the piston rod 3. The sealed cavity is isolated from the inner hole 311 by the sleeve 62, and the movable end 34 is provided with elasticity by arranging high-pressure gas or a spring in the sealed cavity.

[0088] In an optional embodiment, the sleeve 62 is provided with a liquid inlet 622 at the end away from the insert 61, and the width of the liquid inlet 622 is wider as it is farther away from the insert 61.

[0089] According to the above improvement, the resistance of the sleeve 62 to the oil is reduced.

[0090] Working principle:

[0091] 1. Rotor support and position adjustment: The device supports the rotor 16 through the drag bracket 17 and the center bracket 18; the drag bracket 17 is supported from below by symmetric drag bracket rollers 171 installed on the drag bracket seat 172, which is slidingly arranged on the drag bracket tray 173; the center bracket 18 is radially embraced by the rotor 16 through at least three support assemblies (cylinder body 4, piston rod 3, center roller 33) distributed circumferentially; the center bracket 18 includes a lower bracket body 181 and an upper bracket body 182, the lower bracket body 181 is fixed on the center bracket tray 183, and two piston rods 3 are arranged on the lower bracket body 181, and one piston rod 3 is arranged on the upper bracket body 182. The piston rod 3 of the support assembly can be driven to extend and retract by hydraulic pressure (controller controls hydraulic oil supply pipeline): when the hydraulic oil is input / output to the cylinder body 4, the piston 42 is pushed to drive the piston rod 3 to slide, thereby adjusting the contact pressure of the center roller 33 and the rotor 16, adapting to rotors 16 of different diameters or working conditions, and ensuring support stability.

[0092] 2. Water stain removal and pretreatment: The air compressor 2 on the center bracket 18 generates a high-pressure airflow, which is delivered to the air jet pipe 22 through the air cavity 21: the air outlet of the air jet pipe 22 is inclined towards the rotor 16, and the high-pressure airflow is used to remove the coolant water stains on the surface of the rotor 16, avoiding the influence of water stains on subsequent machining precision or lubrication effect.

[0093] 3. Lubrication supply and dynamic enhancement: The high-pressure airflow of the air compressor 2 is also delivered through the air delivery pipe 23, when the air delivery pipe 23 passes through the lubricating oil tank 5, the high-speed airflow carries lubricating oil (the flow rate is accurately controlled by the flow rate regulating valve), and the lubricating oil is delivered to the center roller 33 through the side slot 31 in the piston rod 3 and the telescopic rod 32. The airflow uniformly sprays the lubricating oil on the contact part of the center roller 33 and the rotor 16, forming an oil film to reduce friction and wear. When the rotor 16 shakes and presses the piston rod 3, the telescopic rod 32 is compressed (the telescopic rod 32 is composed of multiple sub-rod segments 321), and the lubricating oil output is instantaneously increased, realizing "dynamic lubrication enhancement" and adapting to sudden friction aggravation working conditions.

[0094] 4. Structural stability and buffering: The side slot 31 (including the inner hole 311 and the outer slot 312) of the piston rod 3 cooperates with the end cover insert block 411 of the cylinder end cover 41 and the shell insert block 1811 of the center bracket 18 shell, which not only seals the cylinder 4 (a sealing ring is arranged at the contact position of the end cover insert block 411 and the side slot 31), but also limits the deviation of the piston rod 3, improving the stability of the support. The tungsten carbide wear-resistant coating on the surface of the center roller 33 further enhances the wear resistance and prolongs the service life. In the second embodiment, the elastic buffer provided by the movable end head 34 and the sealed cavity (containing high-pressure gas or spring) at the end of the piston rod 3, when the rotor 16 shakes violently, the movable end head 34 slides towards the piston rod 3, the insert piece 61 is inserted into the sleeve 62, avoiding excessive contraction of the piston rod 3.

[0095] 5. Intelligent control and adaptive adjustment controller integrates various sensors and actuators: through electromagnetic valve control air cavity 21 and jet pipe 22, air pipe 23 on and off, through the flow regulating valve control lubricating oil tank 5 lubricating oil output, through the hydraulic system to adjust the piston rod 3 telescopic, realize automation operation. Lubricating oil tank 5 oil level monitoring device in the oil level is too low alarm, ensure the continuous lubrication; the flow controller of air compressor 2 outlet can adjust the air pressure, adapt to different cleaning or lubrication needs. Pressure measuring device 36 (located in the pressure measuring channel 35) detects the pressure of the inner hole 311, through the adjustment of air compressor 2 output or electromagnetic valve opening, keep the oil injection pressure balance, at the same time can part of the oil to the outer groove 312, enhance the side wall lubrication.

[0096] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0097] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the following claims and their equivalents.

Claims

1. A resilient support device for a steam turbine rotor deep hole drilling and boring machine, comprising a drag frame (17) and a center frame (18) for supporting a rotor (16), characterized in that: at least three support assemblies are circumferentially arranged on the center frame (18), each support assembly comprising a cylinder (4) fixed to the outside of the center frame (18) and a piston rod (3) penetrating the center frame (18), one end of the piston rod (3) being fixed to a piston (42) sliding in the cylinder (4), the other end being rotatably mounted with a center roller (33), a cylinder end cover (41) being arranged between the cylinder (4) and the center frame (18), the piston rod (3) penetrating the cylinder end cover (41); an air compressor (2) is further arranged on the center frame (18), the air outlet of the air compressor (2) being communicated with an air cavity (21) in the center frame (18), the air cavity (21) being communicated with a jet pipe (22) and a plurality of gas delivery pipes (23), the air outlet of the jet pipe (22) being obliquely directed towards the rotor (16), each gas delivery pipe (23) being connected to a telescopic rod (32) in the corresponding piston rod (3) after passing through a lubricating oil tank (5); a side notch (31) is arranged on the piston rod (3), the telescopic rod (32) is installed in the side notch (31), the port of the telescopic rod (32) is aligned with the center roller (33), an end cover plug (411) is arranged on the cylinder end cover (41) corresponding to the position of the side notch (31), an inner hole is arranged on the center frame (18) shell corresponding to the position of the side notch (31); the high-pressure airflow of the air compressor (2) is simultaneously delivered through the gas delivery pipes (23), when the gas delivery pipes (23) pass through the lubricating oil tank (5), the high-speed airflow carries lubricating oil, which is delivered to the center roller (33) through the side notch (31) and the telescopic rod (32) in the piston rod (3), and the airflow with lubricating liquid in the inner hole is discharged into the outer groove (312) through the pressure measuring device (36). The side notch (31) comprises an inner hole at the central axis of the piston rod (3) and an outer groove (312) communicating the inner hole with the outer wall of the piston rod (3), the inner hole penetrates the upper and lower ends of the piston rod (3), one end of the outer groove (312) penetrates one end of the piston rod (3) in the cylinder (4), and the other end is located inside the piston rod (3). An active end (34) is slidingly arranged at the end of the piston rod (3) close to the center roller (33), the center roller (33) is rotatably mounted on the active end (34), an adjustable nozzle (6) is arranged at the connection between the inner hole in the active end (34) and the inner hole of the piston rod (3), the adjustable nozzle (6) comprises: a plug (61) fixed in the inner hole of the active end (34), an inclined pointed bottom (611) is arranged at the end of the plug (61) away from the center roller (33), the width of the inclined pointed bottom (611) becomes narrower as it is farther away from the active end (34).

2. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 1, wherein ​ 3. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 2, wherein ​ ​ A sleeve (62) is fixed in the inner hole of the end of the piston rod (3) at one end and is slidably inserted into the inner hole of the movable end head (34) at the other end, the sleeve (62) is provided with a liquid outlet (621) at the end close to the insert piece (61), the liquid outlet (621) is narrower at the position farther away from the movable end head (34).

4. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 3, wherein The telescopic rod (32) is composed of multiple sub-rods (321), each sub-rod (321) is sleeved with the adjacent sub-rod (321), and a limiting ring is arranged at the end of the sub-rod (321) to prevent falling off, the outer diameter of each sub-rod (321) increases in turn from the gas conveying pipe (23) to the center roller (33), and the sub-rod (321) at the end close to the center roller (33) in the telescopic rod (32) is slidably connected in the inner hole; A pressure measuring channel (35) is arranged in the inner hole for slidably connecting the sub-rod (321) at the end closest to the center roller (33), the pressure measuring channel (35) is provided with a pressure measuring device (36), the pressure measuring device (36) is provided with a pressure sensor for detecting the pressure in the inner hole, the pressure measuring device (36) is also provided with an electromagnetic valve, and the other end of the pressure measuring device (36) is communicated to one end of the outer groove (312) in the piston rod (3), and the airflow in the inner hole with lubricating liquid is discharged into the outer groove (312) through the pressure measuring device (36).

5. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 3, wherein A sealed cavity is arranged between the movable end head (34) and the end of the piston rod (3), the sealed cavity is located at the contact surface of the movable end head (34) and the piston rod (3), the sealed cavity is isolated from the inner hole by the sleeve (62), and the movable end head (34) is provided with elasticity by arranging high-pressure gas or a spring in the sealed cavity.

6. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 3, wherein The sleeve (62) is provided with a liquid inlet (622) at the end away from the insert piece (61), and the liquid inlet (622) is wider at the position farther away from the insert piece (61).

7. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 1, wherein The steam turbine rotor deep hole drilling and boring machine comprises a bed body (11), a head box (12), a chuck (13), an oil supply box (14), a drill rod (15) and a drill rod seat (19) which are sequentially arranged on the bed body (11), a drag bracket (17) and a center bracket (18) which are arranged on the bed body (11), and the drag bracket (17) and the center bracket (18) are located between the chuck (13) and the oil supply box (14).

8. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 1, wherein The drag bracket (17) comprises a drag bracket tray (173) which is slidably arranged on the bed body (11), two symmetrical drag bracket seats (172) which are slidably arranged on the drag bracket tray (173), and drag bracket rollers (171) which are rotatably arranged on the drag bracket seats (172), and the sliding direction of the drag bracket seat (172) is perpendicular to the sliding direction of the drag bracket tray (173).

9. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 1, wherein The center bracket (18) comprises a lower bracket body (181) and an upper bracket body (182), the lower bracket body (181) is fixedly installed on a center bracket tray (183), the center bracket tray (183) is slidably arranged on the bed body (11), and the air compressor (2) is also installed on the center bracket tray (183). The lower frame body (181) is U-shaped, the upper frame body (182) is rotationally connected at the top of the lower frame body (181), two piston rods (3) are arranged on the lower frame body (181), one piston rod (3) is arranged on the upper frame body (182), and a locking device is further arranged between the lower frame body (181) and the upper frame body (182).

10. The elastic support device of a deep hole drilling and boring machine for steam turbine rotor according to claim 9, wherein The center frame (18) is provided with a shell insertion block (1811) at the position corresponding to the side slot (31).

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