CN215263271U

CN215263271U - Automatic detection device for rotor pin of steam turbine

Info

Publication number: CN215263271U
Application number: CN202120551873.7U
Authority: CN
Inventors: 何华; 王坤; 李梦阳; 孙兴新; 张建伟; 张骏; 谭永生
Original assignee: Northwest Electric Power Research Institute of China Datang Corp Science and Technology Research Institute Co Ltd
Current assignee: Northwest Electric Power Research Institute of China Datang Corp Science and Technology Research Institute Co Ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-12-21
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses a steam turbine rotor pin automatic checkout device, including the epaxial clamp of fixed mounting steam turbine rotor, rotate the cover on the clamp and be equipped with the bearing, bearing inner race surface machining has the meshing tooth, and the meshing tooth meshing has the transmission of installing on the clamp, and bearing inner race surface still is fixed with two-way telescopic link, and two-way telescopic link other end fixedly connected with probe clamping device, the last centre gripping of probe clamping device has the probe, and the probe corresponds and waits to detect the pin. The utility model discloses a steam turbine rotor pin automatic checkout device has solved the use ultrasonic detection who exists among the prior art, and work load is great, and the narrow and small problem that detects inconvenient and be difficult to the location in inboard space.

Description

Automatic detection device for rotor pin of steam turbine

Technical Field

The utility model belongs to the technical field of steam turbine supersound automated inspection, a steam turbine rotor pin automated inspection device is related to.

Background

The steam turbine is one of three main machines of a power generation enterprise and mainly has the function of converting linear motion of high-temperature and high-pressure steam into rotary motion flowing to a shaft of the steam turbine along a pressure gradient to drive a rotor of a generator to generate power. Steam enters a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder of the steam turbine from the boiler. The blades are complex in stress during working, working conditions are severe, each steam turbine is provided with a plurality of stages of blades, each stage of blade is provided with a plurality of blades, as long as one of the blades has a problem, the whole unit can be shut down, and great economic loss is caused.

At present, ultrasonic detection is mainly used for judging early failure of the pin, and the problems that the workload is large, the detection is inconvenient due to the narrow inner space (between two stages of moving blades), barring is needed, the defect is not easy to locate and the defect judgment is inaccurate exist in the detection.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a steam turbine rotor pin automatic checkout device has solved the use ultrasonic detection who exists among the prior art, and work load is great, and the narrow and small problem that detects inconvenient and be difficult to the location in inboard space.

The utility model discloses the technical scheme who adopts is, steam turbine rotor pin automatic checkout device, including the epaxial clamp of fixed mounting steam turbine rotor, rotate the cover on the clamp and be equipped with the bearing, bearing inner race surface machining has the meshing tooth, and the meshing tooth meshing has the transmission of installing on the clamp, and bearing inner race surface still is fixed with two-way telescopic link, and two-way telescopic link other end fixedly connected with probe clamping device, the last centre gripping of probe clamping device has the probe, and the probe corresponds and waits to detect the pin.

The utility model is also characterized in that,

the clamp includes the clamp spare of two semicircle types, and two clamp spares have through bolted connection and form the fixed cover of a circular shape clamp and establish on the steam turbine rotor shaft, and the track all is provided with around its semicircle surface of two clamp spares, and the synthetic circular shape bearing mounting groove of track on it after two clamp spares merge, and the bearing rotates the cover and establishes on the bearing mounting groove.

The bidirectional expansion pole includes along the radial flexible electric telescopic handle a of steam turbine rotor axle, and electric telescopic handle a's stiff end is fixed on the bearing inner race surface, and electric telescopic handle a's flexible end is fixed with electric telescopic handle b's stiff end, and electric telescopic handle b is flexible along the axial of steam turbine rotor axle, and probe clamping device fixes the flexible end at electric telescopic handle b.

The transmission device comprises a gear meshed with the meshing teeth, a gear shaft is fixedly connected in the gear, and the gear shaft is connected with an output shaft of the motor.

A transmission is connected between the gear shaft and the output shaft with the motor.

The probe clamping device comprises a clamping box, the middle position of one end face of the clamping box is fixed at the telescopic end of the electric telescopic rod b through a bolt, springs are fixed on the inner surfaces of the upper end face and the lower end face of the clamping box, the two springs are arranged correspondingly, a clamping plate is fixed at the other end of each spring, a pressing rod is fixed on the clamping plate and extends out of the outer surface of the spring installation end face, and a clamping hole is formed in the middle of one end face, away from the electric telescopic rod b, of the clamping box.

The motor, the electric telescopic rod a, the electric telescopic rod b, the speed changer and the probe are connected with a terminal control device through cables.

The utility model has the advantages that:

the utility model discloses can detect the location to defect pin both ends from the rotor spindle probe detection technique, detection efficiency is high, and the precision is accurate, but realizes the defect real-time recording.

The utility model provides an among the prior art hand sweep the speed of looking into slow, detect data record imperfect, the testing result is not directly perceived, needs the barring to occupy the problem of resource.

Drawings

Fig. 1 is a schematic structural view of the automatic detection device for the rotor pin of the steam turbine of the present invention;

FIG. 2 is a schematic structural view of a transmission device in the automatic pin detection device for the steam turbine rotor of the present invention;

FIG. 3 is a schematic structural view of a probe clamping device in the automatic pin detection device for a steam turbine rotor of the present invention;

fig. 4 is a schematic structural view of a bidirectional telescopic rod in the automatic detection device for the rotor pin of the steam turbine of the present invention;

FIG. 5 is a circuit diagram of the automatic pin detecting device for the steam turbine rotor according to the present invention;

fig. 6 is a state diagram of the automatic detection device for the steam turbine rotor pin in the detection process of the utility model.

In the figure, 1, a hoop, 2, a bearing, 3, meshing teeth, 4, a two-way telescopic rod, 5, a probe clamping device, 6, a probe, 7, a hoop member, 8, a rail, 9, a bearing installation groove, 10, a gear, 11, a gear shaft, 12, a motor, 13, a speed changer, 14, a terminal control device and 15, a pin;

4-1, electric telescopic rods a, 4-2 and electric telescopic rods b;

5-1 parts of a clamping box, 5-2 parts of a bolt, 5-3 parts of a spring, 5-4 parts of a clamping plate, 5-5 parts of a pressing rod and 5-6 parts of a clamping hole.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses steam turbine rotor pin automatic checkout device, its structure is shown in fig. 1-3, including fixed mounting at the epaxial clamp 1 of steam turbine rotor, the cover that rotates on the clamp 1 is equipped with

bearing

2, and 2 outer lane surface machining of bearing have meshing

tooth

3, and 3 meshing of meshing tooth have the transmission of installing on clamp 1, and 2 outer lane surfaces of bearing still are fixed with two-way

telescopic link

4, and 4 other end fixedly connected with of two-way telescopic link probe clamping device 5, the centre gripping has probe 6 on the probe clamping device 5, and probe 6 corresponds and waits to detect pin 15.

The clamp includes the clamp 7 of two semicircle types, and two clamp 7 have through bolted connection and form the fixed cover of a circular shape clamp 1 and establish on the steam turbine rotor shaft, and two clamp 7 all are provided with track 8 around its semicircle surface, and track 8 synthetic circular shape bearing installation groove 9 on it after two clamp 7 merge, and bearing 2 rotates the cover and establishes on bearing installation groove 9.

As shown in FIG. 4, the bidirectional telescopic rod 4 comprises an electric telescopic rod a4-1 which extends and retracts along the radial direction of the steam turbine rotor shaft, the fixed end of the electric telescopic rod a4-1 is fixed on the outer ring surface of the bearing 2, the telescopic end of the electric telescopic rod a4-1 is fixed with the fixed end of an electric telescopic rod b4-2, the electric telescopic rod b4-2 extends and retracts along the axial direction of the steam turbine rotor shaft, and the probe clamping device 5 is fixed at the telescopic end of the electric telescopic rod b 4-2.

The transmission device comprises a gear 10 meshed with the meshing teeth 3, a gear shaft 11 is fixedly connected in the gear 10, and the gear shaft 11 is connected with an output shaft of a motor 12.

A transmission 13 is also connected between the gear shaft 11 and the output shaft having the motor 12.

The probe clamping device 5 comprises a clamping box 5-1, the middle position of one end face of the clamping box 5-1 is fixed at the telescopic end of the electric telescopic rod b4-2 through a bolt 5-2, springs 5-3 are fixed on the inner surfaces of the upper end face and the lower end face of the clamping box 5-1, the two springs 5-3 are arranged correspondingly, a clamping plate 5-4 is fixed at the other end of each spring 5-3, a pressing rod 5-5 is fixed on each clamping plate 5-4, the pressing rod 5-5 extends out of the outer surface of the installation end face of each spring 5-3, and a clamping hole 5-6 is formed in the middle of one end face, away from the electric telescopic rod b4-2, of the clamping box 5-1.

As shown in FIG. 5, the motor 12, the electric telescopic rod a4-1, the electric telescopic rod b4-2, the transmission 13 and the probe 6 are connected to a terminal control device 14 through cables.

The utility model discloses a probe 6 is the special probe of phased array, and the model is many happy automatic coupling shower nozzle probes of taking of pu.

The electric telescopic rod b4-2 and the electric telescopic rod a4-1 of the utility model can adopt an elegant-welcome stroke 1050mm direct current electric push rod telescopic rod.

When the probe clamping device is used for replacing the probe, the probe is fixed through the spring, when the gear is replaced, the pressing rod 5-5 is pulled up by hand, the spring is compressed under the lever action, the probe is taken down, and the pressing rod 5-5 is also required to be installed.

The utility model discloses steam turbine rotor pin automatic checkout device's working process does, as shown in FIG. 6:

step 1, setting the rotating speed of a motor 12 during detection of pins in different layers, the expansion amount of an electric telescopic rod a4-1 and an electric telescopic rod b4-2 during detection of the pins in different layers and the detection residence time according to the distance between the pins in the different layers, and setting the detection residence time in a terminal control device 14;

step 2, installing the automatic detection device for the pins of the steam turbine rotor on a steam turbine rotor shaft, manually adjusting the expansion amount of the electric telescopic rod a4-1 and the electric telescopic rod b4-2, placing a probe on the pins at the outermost side, and recording the number of the currently detected pins as a first number;

step 3, sequentially detecting the pins on the outermost layer according to the interval between every two layers of pins on the outermost layer and the preset corresponding rotating speed and the detection residence time in a counterclockwise sequence, and if the data fed back to the terminal control device 14 by the probe 6 is abnormal data, recording the serial number of the abnormal pin by the terminal control device 14;

step 4, after the detection of the outermost layer is finished, the terminal control device 14 controls the electric telescopic rod a4-1 and the electric telescopic rod b4-2 to move to align the probe 6 with the pin of the next layer according to preset data, controls the motor 12 and the transmission 13 to carry out speed conversion, then detects the next layer according to the detection method of the step 3, and knows that all the layers are detected;

and 5, after all the layers are detected, removing the automatic detection device for the pins of the steam turbine rotor from the other side of the steam turbine rotor shaft, which is positioned on the rotor, detecting the other ends of the pins according to the method in the step 2-4, wherein the numbers are uniform, the same pins are detected from two sides, the numbers of the pins are consistent, and the final number of the abnormal pins is determined, and the rotation direction of the side is clockwise.

The utility model discloses a detect unusual embodiment for can not receive the back wave or the back wave is less than the total length of pin for threshold value or the back wave place degree of depth.

Claims

1. Steam turbine rotor pin automatic checkout device, its characterized in that, including fixed mounting at epaxial clamp (1) of steam turbine rotor, it is equipped with bearing (2) to rotate the cover on clamp (1), bearing (2) outer lane surface machining has meshing tooth (3), meshing tooth (3) meshing has to be installed transmission on clamp (1), bearing (2) outer lane surface still is fixed with two-way telescopic link (4), two-way telescopic link (4) other end fixedly connected with probe clamping device (5), the centre gripping has probe (6) on probe clamping device (5), probe (6) correspond and wait to detect pin (15).

2. The automatic steam turbine rotor pin detection device according to claim 1, wherein the clamp comprises two semicircular clamp members (7), the two clamp members (7) are fixedly sleeved on a steam turbine rotor shaft through a bolt connection to form a circular clamp (1), tracks (8) are arranged on the two clamp members (7) around the semicircular surfaces of the two clamp members, the two tracks (8) on the two clamp members (7) are combined into a circular bearing installation groove (9), and the bearing (2) is rotatably sleeved on the bearing installation groove (9).

3. The automatic steam turbine rotor pin detection device according to claim 2, wherein the bidirectional telescopic rod (4) comprises an electric telescopic rod a (4-1) which extends and retracts in the radial direction of the steam turbine rotor shaft, the fixed end of the electric telescopic rod a (4-1) is fixed on the outer ring surface of the bearing (2), the fixed end of an electric telescopic rod b (4-2) is fixed on the telescopic end of the electric telescopic rod a (4-1), the electric telescopic rod b (4-2) extends and retracts in the axial direction of the steam turbine rotor shaft, and the probe clamping device (5) is fixed on the telescopic end of the electric telescopic rod b (4-2).

4. The automatic steam turbine rotor pin detection device according to claim 3, wherein the transmission device comprises a gear (10) meshed with the meshing teeth (3), a gear shaft (11) is fixedly connected in the gear (10), and an output shaft of the motor (12) is connected to the gear shaft (11).

5. The steam turbine rotor pin automatic detection device according to claim 4, characterized in that a transmission (13) is further connected between the gear shaft (11) and the output shaft having the motor (12).

6. The automatic steam turbine rotor pin detection device according to claim 5, wherein the probe clamping device (5) comprises a clamping box (5-1), the middle position of one end face of the clamping box (5-1) is fixed at the telescopic end of the electric telescopic rod b (4-2) through a bolt (5-2), springs (5-3) are fixed on the inner surfaces of the upper end face and the lower end face of the clamping box (5-1), the two springs (5-3) are arranged correspondingly, a clamping plate (5-4) is fixed at the other end of each spring (5-3), a pressing rod (5-5) is fixed on each clamping plate (5-4), the pressing rod (5-5) extends out of the outer surface of the installation end face of each spring (5-3), and a clamping part is arranged in the middle of one end face, far away from the electric telescopic rod b (4-2), of the clamping box (5-1) And (5-6).

7. The automatic detection device for the steam turbine rotor pin according to claim 6, characterized in that the motor (12), the electric telescopic rod a (4-1), the electric telescopic rod b (4-2), the transmission (13) and the probe (6) are connected with a terminal control device (14) through cables.