阅读说明：本技术 一种汽轮机转轴旋转精确控制装置及使用方法 (Accurate rotation control device for rotating shaft of steam turbine and use method ) 是由 屈斌 张利 王建 李国豪 王梓越 周连升 甘智勇 王坤 于 2019-08-26 设计创作，主要内容包括：本发明涉及一种汽轮机转轴旋转精确控制装置,在控制箱表面设置有开关键、快速旋转按键和慢速旋转按键,控制箱表面设置的电源端子连接开关键的一端,开关键的另一端分别连接快速旋转按键和慢速旋转按键的一端,快速旋转按键的另一端连接控制箱表面设置的控制端子,慢速旋转按键通过一控制箱内设置的脉冲控制器连接所述控制端子。本发明将原本只能在远处进行的旋转角度控制工作转化为可以在加重孔旁边进行,大大提高了控制的准确性和便捷性。实现了对汽轮机转轴旋转速度的快慢调节,提高了加重孔旋转的准确程度,提高了工作效率。将对准时间由之前的20分钟缩短到了1分钟以内。(the invention relates to a steam turbine rotating shaft rotation accurate control device, wherein a switch key, a fast rotation key and a slow rotation key are arranged on the surface of a control box, a power supply terminal arranged on the surface of the control box is connected with one end of the switch key, the other end of the switch key is respectively connected with one end of the fast rotation key and one end of the slow rotation key, the other end of the fast rotation key is connected with a control terminal arranged on the surface of the control box, and the slow rotation key is connected with the control terminal through a pulse controller arranged in the control box. The invention converts the rotation angle control work which can only be carried out at a distance originally into the rotation angle control work which can be carried out beside the weighting hole, thereby greatly improving the accuracy and the convenience of the control. The rotating speed of the rotating shaft of the steam turbine can be adjusted, the accuracy of the rotation of the weighting hole is improved, and the working efficiency is improved. The alignment time is shortened to be within 1 minute from the previous 20 minutes.)

1. the utility model provides a steam turbine pivot rotation accurate control device which characterized in that: including the control box, be provided with on & off switch, fast rotation button and the rotatory button of slow speed on the control box surface, the one end of power supply terminal connection on & off switch that the control box surface set up, the one end of fast rotation button and the rotatory button of slow speed is connected respectively to the other end of on & off switch, and the control terminal that the other end connection control box surface of fast rotation button set up, the rotatory button of slow speed is connected through the pulse controller that sets up in the control box control terminal.

2. The apparatus for precisely controlling the rotation of a rotating shaft of a steam turbine according to claim 1, wherein: a controller battery is arranged in the control box and is a 24V lithium battery.

3. the apparatus for precisely controlling the rotation of a rotating shaft of a steam turbine according to claim 2, wherein: the power supply terminal is connected with a power supply, and the control terminal is connected with a power supply end of the barring gear.

4. the use method of the device for accurately controlling the rotation of the rotating shaft of the steam turbine according to claim 3, wherein: the method comprises the following steps:

the method comprises the steps that a control terminal is connected with a power supply end of a turning gear through a connecting wire, and a switch key is adjusted to be in a closed state;

connecting the power terminal with a power supply through a connecting wire;

opening a switch key;

an operator holds the control box station in a hand and controls the barring gear before the weighting window, so that the weighting hole needing to be weighted rotates to the weighting window, and when the distance angle between the weighting hole and the weighting window is larger, the operator can press the quick rotating button to directly connect the barring gear with the power supply, so that the weighting hole and the weighting window are close to each other as soon as possible;

When the distance is short, the slow-speed rotating button can be pressed, and as the continuous current is changed into the pulse current after the current passes through the pulse controller, the rotating speed of the jigger is greatly reduced, and the weighting hole can be ensured to be accurately aligned to the weighting window;

and fifthly, adjusting the switch key to a closed state after alignment.

Technical Field

The invention belongs to the technical field of power equipment detection, and particularly relates to a device for accurately controlling rotation of a rotating shaft of a steam turbine and a using method thereof.

background

The steam turbine rotating shaft is likely to have a fault of overlarge vibration in the process of high-speed rotating operation, and the overlarge vibration can cause equipment damage to further cause safety accidents, so that equipment and personal loss are caused. Therefore, the vibration fault needs to be managed in time after occurrence, and the vibration amplitude is reduced. One common cause of excessive vibration is mass imbalance caused by uneven mass distribution around the circumference of the rotating shaft, and the mass imbalance accounts for more than 60%. This failure can only be resolved by installing weights on the shaft to counteract the original imbalance. However, the weight mounted on the steam turbine is not randomly mounted at any position, but only in the weighting holes on the hubs of the last-stage blades at two ends of the rotating shaft. The rotating shaft of the steam turbine in the operating state is encapsulated in the shell, and if a weight is required to be installed in the weight hole, the weight can be installed only by opening a small weight window reserved on the shell. The field dynamic balance weighting process is then such that: the method comprises the steps of firstly calculating the weight of a weight hole at which angle needs to be added through data, then starting a barring, driving a rotating shaft to rotate by a barring motor, turning off the motor after the needed weight hole rotates to a weight window, and then installing a weight adding block. Dynamic balancing of the turbine in the field requires that the rotor be externally weighted by rotating the corresponding weighted hole in the shaft into alignment with the weighted window in the housing. This is very difficult because of the following: 1. the weighting window is small and the weighting apertures must be very precisely aligned with the weighting window with little tolerance allowed. 2. The turning gear control switch is far away from the field position of the weighting hole, an operator cannot directly see the rotation of the weighting hole, and only an interphone can be used for receiving the guidance of the field operator to complete the control of the turning gear, which causes great inconvenience to the operation. 3. The barring rotational speed is very fast and can only rotate towards a direction, hardly realizes aggravating hole rotation angle's accurate control through simple opening and closing power, in case rotatory excessively can only rotate a week once more, very waste time. Therefore, it is necessary to invent a device for accurately controlling the rotation of the rotating shaft of the steam turbine, so as to realize the accurate alignment of the weighted holes and shorten the adjustment time.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the accurate control device for the rotation of the rotating shaft of the steam turbine, which is convenient to operate and short in alignment time.

The invention adopts the following specific technical scheme:

The utility model provides a steam turbine pivot rotation accurate control device which characterized in that: including the control box, be provided with on & off switch, fast rotation button and the rotatory button of slow speed on the control box surface, the one end of power supply terminal connection on & off switch that the control box surface set up, the one end of fast rotation button and the rotatory button of slow speed is connected respectively to the other end of on & off switch, and the control terminal that the other end connection control box surface of fast rotation button set up, the rotatory button of slow speed is connected through the pulse controller that sets up in the control box control terminal.

furthermore, a controller battery is arranged in the control box, and the controller battery is a 24V lithium battery.

furthermore, the power supply terminal is connected with a power supply, and the control terminal is connected with a power supply end of the turning gear.

The invention also aims to provide a use method of the device for accurately controlling the rotation of the rotating shaft of the steam turbine, which is characterized by comprising the following steps: the method comprises the following steps:

The method comprises the steps that a control terminal is connected with a power supply end of a turning gear through a connecting wire, and a switch key is adjusted to be in a closed state;

Connecting the power terminal with a power supply through a connecting wire;

Opening a switch key;

an operator holds the control box station in a hand and controls the barring gear before the weighting window, so that the weighting hole needing to be weighted rotates to the weighting window, and when the distance angle between the weighting hole and the weighting window is larger, the operator can press the quick rotating button to directly connect the barring gear with the power supply, so that the weighting hole and the weighting window are close to each other as soon as possible;

When the distance is short, the slow-speed rotating button can be pressed, and as the continuous current is changed into the pulse current after the current passes through the pulse controller, the rotating speed of the jigger is greatly reduced, and the weighting hole can be ensured to be accurately aligned to the weighting window;

and fifthly, adjusting the switch key to a closed state after alignment.

The invention has the advantages and beneficial effects that:

The invention converts the rotation angle control work which can only be carried out at a distance originally into the rotation angle control work which can be carried out beside the weighting hole, thereby greatly improving the accuracy and the convenience of the control. The rotating speed of the rotating shaft of the steam turbine can be adjusted, the accuracy of the rotation of the weighting hole is improved, and the working efficiency is improved. The alignment time is shortened to be within 1 minute from the previous 20 minutes.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is an internal schematic view of fig. 1.

Detailed Description

the present invention is further described in the following examples, but the technical content described in the examples is illustrative and not restrictive, and the scope of the present invention should not be limited thereby.

The invention discloses a device for accurately controlling rotation of a rotating shaft of a steam turbine, which is shown in figures 1 and 2 and is characterized in that: including control box 1 (wide a 10cm, long b 12cm), be provided with on & off switch 9 on the control box surface, fast rotation button 2 and slow speed rotation button 3, the one end of power supply terminal (the lower right corner of fig. 1) linked switch key that the control box surface set up, the one end of fast rotation button and slow speed rotation button is connected respectively to the other end of on & off switch, the control terminal (the upper right corner of fig. 1) of the other end linked control box surface setting of fast rotation button, the pulse controller that slow speed rotation button set up through a control box connects control terminal.

in this embodiment, a controller battery 8 is disposed in the control box, and the controller battery is a 24V lithium battery. The power supply terminal is connected with a power supply, and the control terminal is connected with the power supply end of the barring gear. The switch key is a ship-shaped button, and can be respectively selected to be in an open state and a closed state; the two rotary buttons are reset buttons, the circuit is connected when the two rotary buttons are pressed down, and the circuit is automatically disconnected after the two rotary buttons are lifted up. And two pairs of wiring terminals 4 are arranged on one side of the control box, wherein the power supply terminal on the lower part is used for connecting a turning power supply, and the control terminal on the upper part is used for sending control current to the turning. Two connecting wire 5's length c 1000cm, one end is that the banana head is used for being connected with the terminal on the controller, and the other end is that alligator clip 6 can convenient and fast ground connect power and barring control terminal. The pulse width of the pulse controller was 0.1s and the pulse interval was 0.1 s. The control idea of the device is to realize the fast rotation of the rotating shaft by directly switching on the power supply and the turning gear and realize the slow rotation by connecting the pulse controller in the loop.

The use method of the steam turbine rotating shaft rotation precise control device comprises the following steps:

the method comprises the steps that a control terminal is connected with a power supply end of a turning gear through a connecting wire, and a switch key is adjusted to be in a closed state;

Connecting the power terminal with a power supply through a connecting wire;

opening a switch key;

An operator holds the control box station in a hand and controls the barring gear before the weighting window, so that the weighting hole needing to be weighted rotates to the weighting window, and when the distance angle between the weighting hole and the weighting window is larger, the operator can press the quick rotating button to directly connect the barring gear with the power supply, so that the weighting hole and the weighting window are close to each other as soon as possible;

When the distance is short, the slow-speed rotating button can be pressed, and as the continuous current is changed into the pulse current after the current passes through the pulse controller, the rotating speed of the jigger is greatly reduced, and the weighting hole can be ensured to be accurately aligned to the weighting window;

after alignment is carried out, the main switch at the power supply is disconnected, then the switch key on the controller is turned off, and the connecting wire is removed.

the invention converts the rotation angle control work which can only be carried out at a distance originally into the rotation angle control work which can be carried out beside the weighting hole, thereby greatly improving the accuracy and the convenience of the control. The rotating speed of the rotating shaft of the steam turbine can be adjusted, the accuracy of the rotation of the weighting hole is improved, and the working efficiency is improved. The alignment time is shortened to be within 1 minute from the previous 20 minutes.