Top rotor control system of vertical synchronous motor

Abstract

The utility model discloses a top rotor control system of a vertical synchronous motor. The control system comprises a plurality of hydraulic modules, a plurality of rotor height acquisition modules, a calculation module, a control module and a hydraulic device. According to the utility model, the hydraulic modules which are uniformly distributed below the rotor are used for jacking and resetting the rotor, and the rotor height acquisition modules which are in one-to-one correspondence with the hydraulic modules are used for acquiring the real-time height of the rotor at each hydraulic module during the jacking or resetting period of the rotor; the maximum difference value between the real-time heights of the rotor at the hydraulic modules is calculated through the calculation module, and then the hydraulic modules are controlled to work through the control module based on the maximum difference value, the real-time heights, the first set height, the second set height and the set difference threshold value, so that automatic control over working of the top rotor is achieved. The synchronous jacking or resetting of the rotor by each hydraulic module is ensured, the insufficient jacking height of the rotor and the excessive jacking of the rotor are avoided, the safety of personnel and equipment is greatly improved, and the labor and time are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor maintenance, and more specifically, to a jacking rotor control system for a vertical synchronous motor. Background Technique

[0002] Ensuring that the motor unit is in good condition is the top priority of operation management work. For example, if the unit has been shut down for a long time, the thrust bearing pad and the mirror plate are in long-term static contact. Before starting the unit, the rotor of the unit must be jacked up to separate the two, and then the rotor is lowered to allow the turbine oil to form an oil film on the surface of the thrust bearing pad again, reducing the starting torque, avoiding burning of the motor bearing, and at the same time being able to reduce the probability of overload tripping caused by excessive starting current during the starting process of the unit. However, the existing rotor jacking method has the following defects in the actual operation process: First, there are safety risks for personnel and equipment. The staff needs to climb along a vertical ladder to a certain height from the ground to observe the jacking and resetting of the rotor, there is a risk of falling, and there are blind spots in the observation angle. If the jack fails to fully reset due to a fault, causing the rotor to tilt, it will lead to a serious accident once the machine is started; Second, the jacking height of the rotor cannot be quantitatively monitored. Only relying on the on-site observers to estimate by experience and feeling. Once there is a problem in communication between the operator and the observer or the pace is inconsistent, it is very likely that the jacking height of the rotor is insufficient or the rotor is over-jacked, affecting the output power of the motor and increasing mechanical noise; Third, the operation process is cumbersome and requires a large amount of manpower and time.

[0003] The information disclosed in the background technical part of the present utility model is only intended to deepen the understanding of the general background technology of the present utility model, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Utility Model

[0004] The purpose of the present utility model is to propose a jacking rotor control system for a vertical synchronous motor, which realizes the automatic control of the jacking rotor work, avoids insufficient or excessive jacking of the rotor, greatly improves the safety of personnel and equipment, and saves labor and time.

[0005] To achieve the above object, the present utility model proposes a jacking rotor control system for a vertical synchronous motor, including:

[0006] A plurality of hydraulic modules are evenly distributed below the rotor of the vertical synchronous motor, and the rotor is synchronously jacked up to a first set height through the plurality of hydraulic modules, and after maintaining a set first duration, the rotor is reset to a second set height and maintains a set second duration;

[0007] Multiple rotor height acquisition modules, corresponding to the multiple hydraulic modules one by one, and configured to acquire the real-time height of the rotor at each hydraulic module during the rotor jacking or resetting process through the multiple rotor height acquisition modules;

[0008] A calculation module, configured to calculate the maximum difference between the real-time heights;

[0009] A control module, configured to control the operation of each hydraulic module based on the maximum difference, the real-time heights, the first set height, the second set height, and a set difference threshold;

[0010] A hydraulic device, configured to provide power to the hydraulic modules;

[0011] The calculation module and the control module are arranged in a control cabinet.

[0012] Optionally, it further includes:

[0013] Multiple protection modules, corresponding to the multiple hydraulic modules one by one, and fixed above the first set height, configured to monitor whether the height of the rotor exceeds the first set height through the multiple protection modules, and if so, control each hydraulic module to stop working.

[0014] Optionally, it further includes:

[0015] An alarm module, arranged in the control cabinet, configured to give an alarm when the control module determines that the maximum difference is greater than the difference threshold, or the real-time height is greater than the first set height, or the real-time height is less than the second set height; and

[0016] Give an alarm when the protection module monitors that the height of the rotor exceeds the first set height.

[0017] Optionally, it further includes:

[0018] A video monitoring module, configured to capture the jacking process and resetting process of the rotor.

[0019] Optionally, it further includes:

[0020] A human-machine interaction interface, arranged in the control cabinet, configured for an operator to set parameters, receive the operator's instructions, and display parameters and working status.

[0021] Optionally, the hydraulic module is a mobile hydraulic pump.

[0022] Optionally, it further includes:

[0023] An emergency stop button, arranged in the control cabinet, configured to stop each hydraulic module.

[0024] Optionally, it further includes:

[0025] A manual button, disposed on the control cabinet, for manually controlling each of the hydraulic modules.

[0026] Optionally, when the control module determines that the maximum difference is greater than the difference threshold, or the real-time height is greater than the first set height, or the real-time height is less than the second set height, it controls each of the hydraulic modules to stop working.

[0027] Optionally, it further includes:

[0028] A monitoring interface, disposed on the control cabinet, for displaying the monitoring screen of the video monitoring module.

[0029] The beneficial effects of the present utility model are as follows: The present utility model performs rotor jacking and resetting work through a plurality of hydraulic modules evenly distributed below the rotor of the vertical synchronous motor. The real-time height of the rotor at each hydraulic module during rotor jacking or resetting is collected by a plurality of rotor height acquisition modules corresponding to the hydraulic modules one by one. The maximum difference between the real-time heights of the rotor at each hydraulic module is calculated by the calculation module. Then, the control module controls each hydraulic module to work based on the maximum difference, real-time height, first set height, second set height, and set difference threshold, realizing automatic control of the rotor jacking work, ensuring that each hydraulic module jacks or resets the rotor synchronously, avoiding insufficient rotor jacking height and excessive rotor jacking, greatly improving the safety of personnel and equipment, and saving labor and time.

[0030] The device of the present utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent specific embodiments, or will be described in detail in the accompanying drawings incorporated herein and the subsequent specific embodiments. These accompanying drawings and specific embodiments are jointly used to explain the specific principles of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By describing the exemplary embodiments of the present utility model in more detail in conjunction with the accompanying drawings, the above and other objects, features, and advantages of the present utility model will become more obvious. In the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0032] Figure 1 FIG. shows a schematic diagram of a rotor jacking control system for a vertical synchronous motor according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present utility model will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present utility model more thorough and complete, and to fully convey the scope of the present utility model to those skilled in the art.

[0034] A jacking rotor control system for a vertical synchronous motor according to the present utility model includes:

[0035] A plurality of hydraulic modules, evenly distributed below the rotor of the vertical synchronous motor, synchronously jack up the rotor to a first set height through the plurality of hydraulic modules, and after maintaining the set first duration, reset the rotor to a second set height and maintain the set second duration;

[0036] A plurality of rotor height acquisition modules, corresponding to the plurality of hydraulic modules one by one, and acquiring the real-time height of the rotor at each hydraulic module during the rotor jacking or resetting through the plurality of rotor height acquisition modules;

[0037] A calculation module for calculating the maximum difference between the real-time heights;

[0038] A control module for controlling the operation of each hydraulic module based on the maximum difference, the real-time height, the first set height, the second set height, and the set difference threshold;

[0039] A hydraulic device for providing power to the hydraulic module;

[0040] The calculation module and the control module are arranged in a control cabinet.

[0041] Specifically, the rotor jacking control system of the vertical synchronous motor of the present utility model includes: a plurality of hydraulic modules, a plurality of rotor height acquisition modules, a calculation module, a control module, and a hydraulic device. The calculation module and the control module are arranged in a control cabinet, and power is provided to the plurality of hydraulic modules through the hydraulic device to jack up or reset the rotor under the control of the control module; the plurality of hydraulic modules are evenly distributed under the rotor of the vertical synchronous motor, and the rotor is synchronously jacked up to a first set height through the plurality of hydraulic modules, and after maintaining the set first duration, the rotor is reset to a second set height and maintained for the set second duration; the plurality of rotor height acquisition modules correspond to the plurality of hydraulic modules one by one, and the real-time height of the rotor at each hydraulic module during the rotor jacking or resetting process is acquired through the plurality of rotor height acquisition modules, and then the maximum difference between the real-time heights of the rotor at each hydraulic module is calculated by the calculation module. The control module controls the operation of each hydraulic module based on the maximum difference, the real-time height, the first set height, the second set height, and the set difference threshold. For example, if the maximum difference is greater than the set difference threshold, it means that the rotor is skewed, and at this time, each hydraulic module is controlled to stop working; for example, if the real-time height during the jacking process is greater than the first set height, it means that the rotor is over-jacked, and at this time, each hydraulic module is controlled to stop working; for example, if the real-time height during the resetting process is greater than the second set height, it means that the rotor is not reset in place. The present utility model performs the rotor jacking and resetting work through a plurality of hydraulic modules evenly distributed under the rotor of the vertical synchronous motor, acquires the real-time height of the rotor at each hydraulic module during the rotor jacking or resetting process through a plurality of rotor height acquisition modules corresponding to the hydraulic modules one by one, calculates the maximum difference between the real-time heights of the rotor at each hydraulic module through the calculation module, and then controls the operation of each hydraulic module by the control module based on the maximum difference, the real-time height, the first set height, the second set height, and the set difference threshold, realizing the automatic control of the rotor jacking work, ensuring that each hydraulic module synchronously jacks up or resets the rotor, avoiding insufficient rotor jacking height and over-jacking of the rotor, greatly improving the safety of personnel and equipment, and saving labor and time.

[0042] In one example, it further includes:

[0043] A plurality of protection modules, corresponding to the plurality of hydraulic modules one by one, and fixed above the first set height, and whether the height of the rotor exceeds the first set height is monitored through the plurality of protection modules. If so, each hydraulic module is controlled to stop working.

[0044] Specifically, the present utility model further includes a plurality of protection modules corresponding to the hydraulic modules one by one, and fixed above the first set height, ensuring that when the jacking height of the rotor exceeds the first set height, each hydraulic module is controlled to stop working. Through the protection module, it is possible to avoid over-jacking of the rotor when the rotor height acquisition module fails.

[0045] In one example, it further includes:

[0046] An alarm module, which is arranged in the control cabinet and is used to give an alarm when the control module determines that the maximum difference is greater than the difference threshold, or the real-time height is greater than the first set height, or the real-time height is less than the second set height; and

[0047] Give an alarm when the protection module monitors that the height of the rotor exceeds the first set height.

[0048] In one example, it further includes:

[0049] A video monitoring module, which is used to photograph the jacking process and reset process of the rotor.

[0050] In one example, it further includes:

[0051] A human-machine interaction interface, which is arranged in the control cabinet and is used for operators to set parameters, receive the instructions of the operators, and display parameters and working states.

[0052] In one example, the hydraulic module is a mobile hydraulic pump.

[0053] In one example, it further includes:

[0054] An emergency stop button, which is arranged in the control cabinet and is used to stop each hydraulic module.

[0055] In one example, it further includes:

[0056] A manual button, which is arranged in the control cabinet and is used to manually control each hydraulic module.

[0057] In one example, when the control module determines that the maximum difference is greater than the difference threshold, or the real-time height is greater than the first set height, or the real-time height is less than the second set height, it controls each hydraulic module to stop working.

[0058] In one example, it further includes:

[0059] A monitoring interface, which is arranged in the control cabinet and is used to display the monitoring screen of the video monitoring module.

[0060] Embodiment:

[0061] As Figure 1 shown, this embodiment provides a vertical synchronous motor rotor jacking control system, including:

[0062] The control module 2, monitoring interface 3, and human-machine interaction interface 4 are set in the control cabinet 1. The control module 2 is set inside the control cabinet 1, and the monitoring interface 3 and human-machine interaction interface 4 are set on the front panel of the control cabinet 1; four jacks 6 are connected to the mobile hydraulic pump 5. The jacks 6 are evenly distributed under the motor rotor 10. The mobile hydraulic pump 5 provides power to the jacks 6 to lift and reset the motor rotor 10. Then, the motor rotor 10 is lifted synchronously by multiple jacks 6 to the first set height and maintained for the set first duration, and then the pressure-holding function is achieved. After the motor rotor 10 is lifted in place, it can maintain the lifted height for the set first duration to ensure that the thrust bearing can be disengaged from the mirror plate. Then, the motor rotor 10 is reset to the second set height, that is, the initial position of the motor rotor 10, and maintained for the set second duration, that is, the delay function is achieved to ensure that all the jacks 6 are fully lowered; a sensor bracket is installed at each jack 6, and a laser displacement sensor 7 and a camera 8 are installed on each bracket. The real-time height of the motor rotor 10 at the corresponding jack 6 is collected by the laser displacement sensor 7 and sent to the control module 2. The control module 2 judges whether the motor rotor 10 is eccentrically lifted during the lifting or resetting process according to the real-time height of the motor rotor 10 at each jack 6 and the set difference threshold, judges whether the motor rotor 10 is lifted in place / over-lifted according to the real-time height of the motor rotor 10 at each jack 6 and the first set height, and judges whether the motor rotor 10 is reset in place according to the real-time height of the motor rotor 10 at each jack 6 and the second set height. Then, according to the judgment result, the mobile hydraulic pump 5 is controlled, and then the next operation of each jack 6 is controlled or the work is stopped immediately. At the same time, each camera 9 is aligned with its corresponding jack 6, and the whole process of the jack 6 lifting or resetting the motor rotor 10 is photographed in real time by the camera 9, and the photographed picture is sent to the monitoring interface 3 in real time for the operator to perform remote monitoring; a proximity switch sensor 8 is installed on each of the two brackets to judge whether the motor rotor 10 is fully reset; a proximity switch sensor (not shown in the figure) is installed at a position 0.5 m above the first set height directly above each jack 6, which is used to prevent the motor rotor 10 from being over-lifted by the proximity switch sensor when the laser displacement sensor 7 fails; when the control module 2 judges that the motor rotor 10 is over-lifted or eccentrically lifted, it controls the alarm module (not shown in the figure) to issue an alarm to prompt the staff, and at the same time controls each jack 6 to stop working; the operator sets various parameters, views various parameters, and realizes the one-key start-stop function through the human-machine interaction interface 4. For example, the first set height, the first duration, and the second duration are set, etc. Manual control and emergency stop are performed through the buttons set on the front panel of the control cabinet 1, and automatic control is enabled.

[0063] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A vertical synchronous motor top rotor control system, characterized in that: include: A plurality of hydraulic modules are evenly distributed below the rotor of the vertical synchronous motor, and the rotor is synchronously lifted to a first set height by the plurality of hydraulic modules, and maintained at a first set time, and then the rotor is reset to a second set height and maintained at a second set time; A plurality of rotor height acquisition modules, corresponding one to one with the plurality of hydraulic modules, and collecting the real-time height of the rotor at each hydraulic module during the lifting or resetting of the rotor through the plurality of rotor height acquisition modules; A calculation module, used for calculating the maximum difference between the real-time altitudes; A control module, configured to control the operation of each of the hydraulic modules based on the maximum difference, the real-time height, the first set height, the second set height and a set difference threshold; A hydraulic device, used to provide power to the hydraulic module; The calculation module and the control module are arranged in a control cabinet.

2. The vertical synchronous motor top rotor control system according to claim 1, characterized in that: Also includes: A plurality of protection modules correspond to the plurality of hydraulic modules one by one and are fixed above the first set height. The plurality of protection modules monitor whether the height of the rotor exceeds the first set height. If so, each of the hydraulic modules is controlled to stop working.

3. The vertical synchronous motor top rotor control system according to claim 2, characterized in that: Also includes: an alarm module, disposed in the control cabinet, for issuing an alarm when the control module determines that the maximum difference is greater than the difference threshold, or the real-time height is greater than the first set height, or the real-time height is less than the second set height; and When the protection module monitors that the height of the rotor exceeds the first set height, an alarm is issued.

4. The vertical synchronous motor top rotor control system according to claim 1, characterized in that: Also includes: The video monitoring module is used to film the lifting process and the resetting process of the rotor.

5. The vertical synchronous motor top rotor control system according to claim 1, characterized in that: Also includes: The human-machine interaction interface is arranged in the control cabinet and is used for the operator to set parameters, receive the operator's instructions, and display parameters and working status.

6. The vertical synchronous motor top rotor control system according to claim 1, characterized in that: The hydraulic device is a mobile hydraulic pump.

7. The vertical synchronous motor top rotor control system according to claim 1, characterized in that: Also includes: An emergency stop button is arranged on the control cabinet and is used to stop each of the hydraulic modules.

8. The vertical synchronous motor top rotor control system according to claim 1, characterized in that: Also includes: A manual button is arranged on the control cabinet and is used for manually controlling each of the hydraulic modules.

9. The vertical synchronous motor top rotor control system according to claim 1, characterized in that: When the control module determines that the maximum difference is greater than the difference threshold, or the real-time height is greater than the first set height, or the real-time height is less than the second set height, each of the hydraulic modules is controlled to stop working.

10. The vertical synchronous motor top rotor control system according to claim 4, characterized in that: Also includes: The monitoring interface is arranged in the control cabinet and is used to display the monitoring screen of the video monitoring module.

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