Self-adaptive dynamic balance compensation device and method for rotor of superconducting synchronous phase modifier

Abstract

The invention discloses a superconductive synchronous phase modifier rotor adaptive dynamic balance compensation device and method, and relates to the technical field of superconductive synchronous phase modifiers, the superconductive synchronous phase modifier rotor adaptive dynamic balance compensation device comprises a rotor, the rotor is fixedly connected with a rotating shaft, and a plurality of vibration signal capture sensors are uniformly distributed on the side surface of the rotor and used for monitoring the vibration condition of each point in the circumferential direction of the rotor in real time; a gravity center compensation mechanism is further installed on the side face of the rotor and used for correcting the dynamic unbalance situation generated in the rotating process of the rotor in real time. When a certain vibration signal capture sensor on a rotor monitors that a dynamic unbalance condition occurs at a corresponding point, a sealing push plate in a balance box body at a corresponding position pushes out balance liquid stored in the balance box body through a communicating pipe, and the sealing push plates in the oppositely arranged balance box bodies move to a position far away from the communicating pipe; and the spaces, communicated with the communicating pipes, in the opposite balancing box bodies are filled with the pushed balancing liquid, so that the adjustment and compensation of the gravity center distribution of the rotor are completed.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting synchronous condenser technology, and in particular to a superconducting synchronous condenser rotor adaptive dynamic balance compensation device and method. Background Art

[0002] At present, there is an asymmetric phenomenon in the axial mass distribution of the superconducting synchronous condenser rotor. The uneven axial mass may have a certain impact on the dynamic balance of the rotor. At the same time, the uneven radial mass distribution caused by the influence of processing accuracy and processing technology will cause the superconducting synchronous condenser rotor to have dynamic imbalance problems during rotation.

[0003] When the rotor is dynamically unbalanced, it will cause strong vibration of the motor during operation, and cause fluctuations in the air gap between the motor rotor and stator, which will affect the stability of the motor operation, increase power consumption, and even cause major equipment accidents. Therefore, it is usually necessary to perform dynamic balancing tests and adjustments on the motor rotor during the production process to ensure the dynamic balancing coefficient required by the design.

[0004] The existing technical solution is to install mass blocks on both sides of the rotor for dynamic balance compensation after measurement, which is a static compensation method. When the rotor is running at high speed, the cold helium gas introduced into it for heat dissipation may cause uneven mass distribution of the rotor due to the influence of centrifugal force. In addition, when the heat distribution of the superconducting magnet is uneven, it may also cause uneven radial mass distribution. When the superconducting phase regulator encounters grid flicker or a large load in a short period of time, it may suddenly encounter vibration or rapid dynamic changes or alternating loads, which may cause uneven radial mass distribution, and then lead to dynamic imbalance, causing speed oscillation. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a superconducting synchronous condenser rotor adaptive dynamic balance compensation device and method, the device includes a rotor, a rotating shaft is fixedly connected to the rotor, and a plurality of vibration signal capture sensors are evenly distributed on the side of the rotor, which are used to monitor the vibration conditions at various points in the circumference of the rotor in real time, and a center of gravity compensation mechanism is also installed on the side of the rotor, which is used to perform real-time correction of the dynamic imbalance conditions generated during the rotation of the rotor. When a vibration signal capture sensor on the rotor detects the occurrence of dynamic imbalance at the corresponding point, the sealing push plate in the balance box at the corresponding position pushes the balance liquid stored in the balance box through the connecting pipe, and the sealing push plate in the opposite balance box moves to a position away from the connecting pipe, so that the space in the opposite balance box connected to the connecting pipe is filled with the pushed balance liquid, thereby completing the adjustment and compensation of the rotor center of gravity distribution.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A superconducting synchronous condenser rotor adaptive dynamic balance compensation device comprises a rotor, to which a rotating shaft is fixedly connected, and a plurality of vibration signal capture sensors are evenly distributed on the side of the rotor for real-time monitoring of the vibration conditions at various circumferential points of the rotor; a center of gravity compensation mechanism is also installed on the side of the rotor for real-time correction of the dynamic imbalance conditions generated during the rotation of the rotor.

[0008] Furthermore, the center of gravity compensation mechanism includes a circulating circular tube fixedly connected to the side of the rotor, the circulating circular tube is evenly distributed along the central axis of the rotating shaft, a plurality of connecting tubes are fixedly connected to the outer surface of the circulating circular tube, one end of each connecting tube is fixedly connected to a balancing box, the circulating circular tube and the connecting tube are completely filled with balancing liquid, and the balancing box is partially filled with balancing liquid, and the balancing liquid can enter different balancing boxes through the circulating circular tube and the connecting tube, thereby achieving the effect of adjusting the center of gravity.

[0009] Furthermore, a sealing push plate is movably connected inside the balancing box, and the sealing push plate can slide along the inner wall of the balancing box. The sealing push plate divides the internal space of the balancing box into two parts, and the space connected to the connecting pipe is filled with balancing liquid.

[0010] Furthermore, a telescopic rod is fixedly connected to the space of the balancing box body not in the communicating part of the communicating pipe, and the output end of the telescopic rod is fixedly connected to the sealing push plate.

[0011] Furthermore, a plurality of balancing boxes are arranged in pairs, and two balancing boxes arranged opposite to each other form a group, which are used to correct the dynamic imbalance of corresponding points on the circumference of the rotor.

[0012] Furthermore, a sealing sleeve is sleeved on the outer surface of the sealing push plate.

[0013] Furthermore, the number of the circulating circular pipes, the connecting pipes, and the balancing boxes corresponds to the number of the vibration signal capturing sensors.

[0014] Furthermore, the outside of each connecting pipe is fixedly connected with a control valve.

[0015] The present invention also provides a superconducting synchronous condenser rotor adaptive dynamic balance compensation method, comprising the following steps:

[0016] Step 1: The rotor and the shaft are idling together, and the vibration signal reference value of each circumferential point of the rotor is recorded by a vibration signal capture sensor;

[0017] Step 2: The rotor and the shaft rotate under normal load, and the vibration signal detection value of each point on the rotor circumference is recorded by the vibration signal capture sensor, and compared with the vibration signal reference value;

[0018] Step 3, set any two points on the circumference of the rotor, namely point a and point b, which are symmetrical about the central axis of the rotor; when the vibration signal detection value of point a is greater than the vibration signal reference value, the control valves corresponding to points a and b are opened, the telescopic rod in the balancing box corresponding to point a is extended, and the telescopic rod in the balancing box corresponding to point b is contracted, and part of the balancing liquid is pushed into the balancing box corresponding to point b through the circulating circular pipe;

[0019] Step 4: Repeat the test in step 2 and compare;

[0020] Step 5: When the vibration signal detection values ​​at point a and point b are equal to the vibration signal reference values, the control valves corresponding to point a and point b are closed, and the system is in a dynamic balance state.

[0021] Beneficial effects:

[0022] 1. In the present invention, when the vibration signal capture sensor detects dynamic imbalance at a certain point in the circumference of the rotor, compensation processing is performed through the action of the center of gravity compensation mechanism to avoid uneven radial mass distribution, dynamic imbalance, and speed oscillation.

[0023] 2. In the present invention, when a vibration signal capture sensor on the rotor detects dynamic imbalance at a corresponding point, the sealing push plate in the balancing box at the corresponding position pushes out the balancing liquid stored in the balancing box through the connecting pipe, and the sealing push plate in the opposite balancing box moves to a position away from the connecting pipe, so that the space in the opposite balancing box connected to the connecting pipe is filled with the pushed out balancing liquid, thereby completing the adjustment and compensation of the rotor center of gravity distribution.

[0024] 3. In the present invention, the sealing push plate divides the internal space of the balance box into two parts. The space connected to the connecting pipe is filled with a balance liquid, and the other part is equipped with a structure for driving the sealing push plate to move back and forth. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a superconducting synchronous condenser rotor adaptive dynamic balance compensation device of the present invention;

[0026] Figure 2 It is a side structural schematic diagram of a superconducting synchronous condenser rotor adaptive dynamic balance compensation device of the present invention;

[0027] Figure 3 It is a schematic diagram of the internal structure of the balance box of the present invention;

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the circulating circular pipe and the connecting pipe of the present invention;

[0029] Figure 5 For the present invention Figure 1A schematic diagram of the enlarged structure at A in the middle;

[0030] Figure 6 For the present invention Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0031] Figure 7 It is a flow chart of a superconducting synchronous condenser rotor adaptive dynamic balance compensation method of the present invention;

[0032] Figure 8 It is a schematic diagram of the counterweight of the present invention sliding on the slide bar.

[0033] In the figure, the reference numerals are: 1, rotor; 2, rotating shaft; 3, vibration signal capture sensor; 4, circulating circular pipe; 5, connecting pipe; 6, control valve; 7, balance box; 8, telescopic rod; 9, sealing push plate; 10, sealing sleeve; 11, balancing liquid. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] The present invention is further described in detail below with reference to the embodiments.

[0036] Embodiment 1:

[0037] like Figure 1-Figure 6 As shown, the present invention provides a superconducting synchronous phase condenser rotor adaptive dynamic balance compensation device, including a rotor 1, a rotating shaft 2 is fixedly connected to the rotor 1, and a plurality of vibration signal capture sensors 3 are evenly distributed on the inner circumference of the rotor 1 for real-time monitoring of the vibration conditions at various circumferential points of the rotor 1. The rotor 1 is a prior art, including an acceleration sensor, a speed sensor, a displacement sensor, a piezoelectric vibration sensor, a strain vibration sensor, etc., for real-time monitoring of the vibration conditions at various circumferential points of the rotor 1.

[0038] A center of gravity compensation mechanism is also installed on the side of the rotor 1, which is used to perform real-time correction on the dynamic imbalance generated during the rotation of the rotor 1. When the vibration signal capture sensor 3 detects dynamic imbalance at a certain point in the circumference of the rotor 1, compensation is performed through the center of gravity compensation mechanism to avoid uneven radial mass distribution, dynamic imbalance, and speed oscillation.

[0039] Furthermore, the center of gravity compensation mechanism includes a circulation tube 4 fixedly connected to the side of the rotor 1, the circulation tube 4 is sleeved on the outer circumference of the rotating shaft 2, a plurality of connecting tubes 5 are fixedly connected to the outer surface of the circulation tube 4, one end of each connecting tube 5 is fixedly connected to a balancing box 7, and the circulation tube 4 and the connecting tube 5 are all filled with a balancing liquid 11. The plurality of connecting tubes 5 are evenly distributed around the central axis of the rotating shaft 2.

[0040] like Figure 3 As shown, the balancing box 7 is partially filled with a balancing liquid 11, that is, the internal space of the balancing box 7 is divided into two by the sealing push plate 9, wherein the part connected with the connecting pipe 5 is filled with the balancing liquid 11, and the balancing liquid 11 can enter different balancing boxes 7 through the circulating circular pipe 4 and the connecting pipe 5 to achieve the effect of adjusting the center of gravity.

[0041] When a vibration signal capture sensor 3 on the rotor 1 detects dynamic imbalance at a corresponding point, the balancing liquid 11 in the balancing box 7 at the corresponding position is introduced into the opposite balancing box 7 through the connecting pipe 5 and the circulating circular pipe 4, thereby achieving the purpose of adjusting the center of gravity distribution of the rotor 1.

[0042] Specifically, when the vibration signal capture sensor 3 detects that a certain point of the rotor 1 is dynamically unbalanced, the control valves 6 connected to the balancing box 7 at the corresponding position of the vibration signal capture sensor 3 are all opened, and the two balancing boxes 7 arranged opposite to each other are connected through the connecting function of the circulating circular pipe 4. The telescopic rod 8 in the balancing box 7 at the corresponding position of the vibration signal capture sensor 3 pushes the sealing push plate 9 to push out the balancing liquid 11 stored in the balancing box 7 through the connecting pipe 5. The telescopic rod 8 in the balancing box 7 arranged opposite to each other drives the sealing push plate 9 to move away from the connecting pipe 5, so that the space in the opposite balancing box 7 connected to the connecting pipe 5 is filled with the pushed out balancing liquid 11, thereby completing the adjustment and compensation of the center of gravity distribution of the rotor 1. 8 is driven by an electric drive or a pneumatic drive device. The control valve 6 is opened by an existing control device.

[0043] Furthermore, the center of gravity compensation mechanism also includes a plurality of counterweights fixedly connected to the rotor 1. The counterweights can adjust their positions radially along the rotor 1 according to the vibration conditions of various circumferential points of the rotor 1, so as to adjust the center of gravity distribution of the rotor 1 and achieve the adjustment of dynamic imbalance.

[0044] Furthermore, the balancing box 7 is movably connected to a sealing push plate 9, which can slide along the inner wall of the balancing box 7. The sealing push plate 9 divides the internal space of the balancing box 7 into two parts, and the space connected to the connecting pipe 5 is filled with a balancing liquid 11. When a vibration signal capture sensor 3 on the rotor 1 detects dynamic imbalance at a corresponding point, the sealing push plate 9 in the balancing box 7 at the corresponding position pushes the balancing liquid 11 stored in the balancing box 7 through the connecting pipe 5, and the sealing push plate 9 in the balancing box 7 arranged oppositely moves to a position away from the connecting pipe 5, so that the space in the opposite balancing box 7 connected to the connecting pipe 5 is filled with the pushed balancing liquid 11, thereby completing the adjustment and compensation of the center of gravity distribution of the rotor 1.

[0045] Furthermore, a telescopic rod 8 is fixedly connected to the space of the balancing box 7 not connected to the connecting pipe 5, and the output end of the telescopic rod 8 is fixedly connected to the sealing push plate 9, and the telescopic rod 8 can push the sealing push plate 9 to reciprocate along the inner wall of the balancing box 7.

[0046] Furthermore, a plurality of balancing boxes 7 are arranged in pairs, and two balancing boxes 7 arranged opposite to each other form a group, which are used to correct the dynamic imbalance of corresponding points in the circumferential direction of the rotor 1 .

[0047] Furthermore, if Figure 6 As shown, a sealing sleeve 10 is sleeved on the outer surface of the sealing push plate 9 to enhance the sealing performance of the sealing push plate 9, and the internal space of the balance box 7 is divided into two parts. The part connected with the connecting pipe 5 is filled with the balancing liquid 11, and the other part is installed with a structure for driving the sealing push plate 9 to move back and forth.

[0048] Furthermore, the number of the circulating circular pipes 4 , the connecting pipes 5 , and the balancing boxes 7 corresponds to the number of the vibration signal capturing sensors 3 , so as to maintain the uniformity of the structural arrangements on the rotor 1 .

[0049] Furthermore, the outside of each connecting pipe 5 is fixedly connected with a control valve 6 , and the control valve 6 is used to control the balancing liquid 11 to flow into and out of the balancing box 7 .

[0050] like Figure 7 As shown, the superconducting synchronous condenser rotor adaptive dynamic balance compensation method of the embodiment of the present invention comprises the following steps:

[0051] Step 1: The rotor 1 and the rotating shaft 2 cooperate to rotate idly, and the vibration signal reference value of each circumferential point of the rotor 1 is recorded by the vibration signal capture sensor 3;

[0052] Step 2: The rotor 1 and the shaft 2 rotate under normal load, and the vibration signal detection value of each circumferential point of the rotor 1 is recorded by the vibration signal capture sensor 3, and compared with the vibration signal reference value;

[0053] Step 3, set any two points on the circumference of the rotor, namely point a and point b, which are symmetrical about the central axis of the rotor; when the vibration signal detection value of point a is greater than the vibration signal reference value, the control valves 6 corresponding to points a and b are both opened, the telescopic rod 8 in the balancing box 7 corresponding to point a is extended, and the telescopic rod 8 in the balancing box 7 corresponding to point b is contracted, and part of the balancing liquid 11 is pushed into the balancing box 7 corresponding to point b through the circulating circular pipe 4, and the volume of the pushed balancing liquid 11 is s;

[0054] Step 4: Repeat the test in step 2 and compare;

[0055] Step 5: When the vibration signal detection values ​​at point a and point b are equal to the vibration signal reference values, the control valves 6 corresponding to point a and point b are closed, and are in a dynamic balance state.

[0056] Furthermore, if Figure 8 As shown, the center of gravity compensation mechanism also includes a plurality of counterweights movably connected to the rotor 1. The counterweights can move radially along the rotor 1 according to the vibration conditions of various circumferential points of the rotor 1, that is, they can slide along the slide rod through the action of the driving device to adjust their positions, so as to achieve the purpose of adjusting the center of gravity distribution of the rotor 1 and achieve the adjustment of dynamic imbalance, wherein the driving device is the prior art.

Claims

1. A superconducting synchronous condenser rotor adaptive dynamic balance compensation device, characterized in that: Comprising a rotor (1), to which a rotating shaft (2) is fixedly connected, and a plurality of vibration signal capture sensors (3) are evenly distributed on the side surface of the rotor (1) for real-time monitoring of vibration conditions at various circumferential points of the rotor (1); A center of gravity compensation mechanism is also installed on the side of the rotor (1) for real-time correction of dynamic imbalance generated during the rotation of the rotor (1).

2. The superconducting synchronous condenser rotor adaptive dynamic balance compensation device according to claim 1, characterized in that: The center of gravity compensation mechanism comprises a circulation tube (4) fixedly connected to the side of the rotor (1), the circulation tube (4) being evenly distributed along the central axis of the rotating shaft (2), a plurality of connecting tubes (5) being fixedly connected to the outer surface of the circulation tube (4), one end of each connecting tube (5) being fixedly connected to a balancing box (7), the circulation tube (4) and the connecting tube (5) being completely filled with a balancing liquid (11), and the balancing box (7) being partially filled with a balancing liquid (11), and the balancing liquid (11) entering different balancing boxes (7) through the circulation tube (4) and the connecting tube (5) to achieve the effect of adjusting the center of gravity.

3. The superconducting synchronous condenser rotor adaptive dynamic balance compensation device according to claim 2, characterized in that: The balancing box (7) is movably connected to a sealing push plate (9) inside. The sealing push plate (9) can slide along the inner wall of the balancing box (7). The sealing push plate (9) divides the internal space of the balancing box (7) into two parts. The space connected to the connecting pipe (5) is filled with a balancing liquid (11).

4. The superconducting synchronous condenser rotor adaptive dynamic balance compensation device according to claim 2, characterized in that: A telescopic rod (8) is fixedly connected to the space of the balancing box (7) that is not in communication with the communicating pipe (5), and an output end of the telescopic rod (8) is fixedly connected to a sealing push plate (9).

5. The superconducting synchronous condenser rotor adaptive dynamic balance compensation device according to claim 2, characterized in that: A plurality of balancing boxes (7) are arranged in pairs, and two balancing boxes (7) arranged opposite to each other form a group, and are used to correct the dynamic imbalance of corresponding points on the circumference of the rotor (1).

6. The superconducting synchronous condenser rotor adaptive dynamic balance compensation device according to claim 3, characterized in that: A sealing sleeve (10) is sleeved on the outer surface of the sealing push plate (9).

7. The superconducting synchronous condenser rotor adaptive dynamic balance compensation device according to claim 2, characterized in that: The number of the circulating circular pipe (4), the connecting pipe (5), and the balancing box (7) corresponds to the number of the vibration signal capturing sensors (3).

8. The superconducting synchronous condenser rotor adaptive dynamic balance compensation device according to claim 2, characterized in that: The outside of each connecting pipe (5) is fixedly connected to a control valve (6).

9. A superconducting synchronous condenser rotor adaptive dynamic balance compensation method, characterized in that: The steps include: Step 1: The rotor and the shaft are idling together, and the vibration signal reference value of each circumferential point of the rotor is recorded by a vibration signal capture sensor; Step 2: The rotor and the shaft rotate under normal load, and the vibration signal detection value of each point on the rotor circumference is recorded by the vibration signal capture sensor, and compared with the vibration signal reference value; Step 3, set any two points on the circumference of the rotor, namely point a and point b, which are symmetrical about the central axis of the rotor; when the vibration signal detection value of point a is greater than the vibration signal reference value, the control valves corresponding to points a and b are opened, the telescopic rod in the balancing box corresponding to point a is extended, and the telescopic rod in the balancing box corresponding to point b is contracted, and part of the balancing liquid is pushed into the balancing box corresponding to point b through the circulating circular pipe; Step 4: Repeat the test in step 2 and compare; Step 5: When the vibration signal detection values ​​at point a and point b are equal to the vibration signal reference values, the control valves corresponding to point a and point b are closed, and the system is in a dynamic balance state.

Images