CN111608744B

CN111608744B - Turbine bearing temperature protection method and device and electronic equipment

Info

Publication number: CN111608744B
Application number: CN202010632283.7A
Authority: CN
Inventors: 王志超
Original assignee: Shenhua Shendong Power Co Ltd; Dianta Power Generating Co of Shenhua Shendong Power Co Ltd
Current assignee: Shenhua Shendong Power Co Ltd; Dianta Power Generating Co of Shenhua Shendong Power Co Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2022-05-10
Anticipated expiration: 2040-07-03
Also published as: CN111608744A

Abstract

The embodiment of the specification discloses a temperature protection method and device for a turbine bearing, electronic equipment and a computer storage medium. The method comprises the following steps: a) detecting the temperature of a corresponding temperature measuring point on each bearing bush of the turbine bearing in the operation process of the turbine; b) judging whether the temperature of the temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing; c) judging whether the temperature measuring point is a dead point or not, or judging whether the temperature rising rate corresponding to the temperature measuring point exceeds a preset threshold value or not; d) and c, determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the step b and/or the step c. The embodiment of the specification can reduce the misoperation of the unit and ensure the safe, stable and economic operation of the unit.

Description

Turbine bearing temperature protection method and device and electronic equipment

Technical Field

The specification relates to the field of safe operation of thermal power generating units, in particular to a method and a device for protecting the temperature of a turbine bearing, electronic equipment and a computer readable storage medium.

Background

In order to ensure the safe operation of a large-capacity thermal power generating unit, the requirements on a protection control system of the unit are higher and higher. At present, because of process limitation, temperature protection of a turbine bearing can only be realized by single-point temperature measurement, and when the current measured temperature of any one temperature measuring point in a plurality of temperature measuring points included in the turbine bearing reaches an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing, the whole turbine bearing is executed to stop the operation. However, the temperature of the temperature measuring point exceeds the action threshold, and the temperature of the measuring point is possibly distorted due to other reasons rather than the overtemperature detection caused by the actual increase of the metal temperature of the turbine unit. Therefore, under the condition, the temperature protection of the turbine bearing can be misjudged, and the execution of the shutdown action of the turbine bearing can cause the temperature protection system to be easily misoperated, so that the safe, stable and economic operation of the unit is seriously influenced.

Therefore, a solution for reliably and effectively protecting the temperature of the turbine bearing is needed.

Disclosure of Invention

The embodiment of the specification provides a method and a device for protecting the temperature of a turbine bearing, electronic equipment and a computer readable storage medium, so as to solve the problem that the existing turbine bearing temperature protection is prone to misoperation.

In order to solve the above technical problem, the present specification is implemented as follows:

in a first aspect, an embodiment of the present specification provides a method for protecting a temperature of a bearing of a steam turbine, including the following steps:

a) detecting the temperature of corresponding temperature measuring points on each bearing bush of the turbine bearing in the operation process of the turbine;

b) judging whether the temperature of the temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing;

c) judging whether the temperature measuring point is a dead point or not, or judging whether the temperature rising rate corresponding to the temperature measuring point exceeds a preset threshold value or not;

d) and c, determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the step b and/or the judgment result of the step c.

Optionally, the determining whether the temperature increase rate corresponding to the temperature measurement point exceeds a predetermined threshold includes: determining the difference value between the current temperature of the temperature measuring point and the historical temperature before a preset period; determining the heating rate of the temperature measuring point according to the difference and the preset period; comparing the temperature rise rate with the magnitude of the predetermined threshold; and under the condition that the temperature rise rate is greater than the preset threshold value, determining that the temperature rise rate corresponding to the temperature measuring point exceeds the preset threshold value.

Optionally, step d includes: and under the condition that the temperature measuring point is judged to be a dead spot, determining that the temperature protection action of the turbine bearing is not executed on the temperature measuring point.

Optionally, step d includes: and under the condition that the temperature rise rate corresponding to the temperature measuring point is judged to exceed a preset threshold value, determining that the temperature protection action of the turbine bearing is not executed on the temperature measuring point.

Optionally, step d includes: and under the condition that the temperature measuring point is judged not to be a dead spot and the heating rate corresponding to the temperature measuring point does not exceed a preset threshold, if the temperature of the temperature measuring point does not exceed an action threshold corresponding to the temperature protection action of the turbine bearing, determining that the temperature protection action of the turbine bearing is not executed on the temperature measuring point.

Optionally, step d includes: and under the condition that the temperature measuring point is judged not to be a dead spot and the heating rate corresponding to the temperature measuring point does not exceed a preset threshold, if the temperature of the temperature measuring point exceeds an action threshold corresponding to the execution of the temperature protection action of the turbine bearing, determining to execute the temperature protection action of the turbine bearing on the temperature measuring point.

Optionally, the bearing bush includes a first temperature measuring point and a second temperature measuring point, and a temperature correlation exists between the first temperature measuring point and the second temperature measuring point, where step b includes: b1) judging whether the temperature of the first temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing; b2) judging whether the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the turbine bearing, wherein the alarm threshold is smaller than the action threshold;

wherein the step d comprises: and determining whether to execute the temperature protection action of the turbine bearing according to the judgment results of the steps b1 and b2 and the judgment result of the step c.

Optionally, the judgment results of the steps b1 and b2 include:

under the condition that the temperature of the first temperature measuring point is judged to exceed an action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing, and the temperature of the second temperature measuring point is judged not to exceed an alarm threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing, the temperature of the second temperature measuring point is judged not to exceed an action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing; and/or

And under the condition that the temperature of the first temperature measuring point is judged to exceed an action threshold corresponding to the execution of the temperature protection action of the steam turbine bearing, and the temperature of the second temperature measuring point is judged to exceed an alarm threshold corresponding to the execution of the temperature protection action of the steam turbine bearing, judging that the temperature of the second temperature measuring point exceeds an action threshold corresponding to the execution of the temperature protection action of the steam turbine bearing.

Optionally, the turbine bearing includes a first bearing and a second bearing, an action threshold corresponding to the first bearing executing the temperature protection action is a first threshold, an action threshold corresponding to the second bearing executing the temperature protection action is a second threshold, and the first threshold is different from the second threshold.

Optionally, step d includes:

and under the condition that the temperature measuring points are judged to be not dead spots and the heating rate corresponding to the temperature measuring points does not exceed a preset threshold, if the temperature of the temperature measuring points corresponding to the first bearing is judged to exceed the first threshold or the temperature of the temperature measuring points corresponding to the second bearing is judged to exceed the second threshold, determining to execute the temperature protection action of the turbine bearing on the corresponding temperature measuring points.

In a second aspect, an embodiment of the present specification provides a method for protecting a temperature of a bearing of a steam turbine, including the following steps:

a) in the operation process of a steam turbine, detecting the temperature of a temperature measuring point corresponding to each bearing bush of a steam turbine bearing, wherein each bearing bush comprises a first temperature measuring point and a second temperature measuring point, and the first temperature measuring point and the second temperature measuring point have temperature correlation;

b) judging whether the temperature of the first temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing;

c) judging whether the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the turbine bearing, wherein the alarm threshold is smaller than the action threshold;

d) and c, determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the step b and the judgment result of the step c.

Optionally, step d includes:

and under the condition that the temperature of the first temperature measuring point is judged to exceed an action threshold corresponding to the execution of the temperature protection action of the steam turbine bearing and the temperature of the second temperature measuring point is judged not to exceed an alarm threshold corresponding to the execution of the temperature protection action of the steam turbine bearing, determining not to execute the temperature protection action of the steam turbine bearing on the first temperature measuring point.

Optionally, step d includes:

and under the condition that the temperature of the first temperature measuring point is judged to exceed an action threshold corresponding to the execution of the temperature protection action of the steam turbine bearing and the temperature of the second temperature measuring point is judged to exceed an alarm threshold corresponding to the execution of the temperature protection action of the steam turbine bearing, the temperature protection action of the steam turbine bearing on the first temperature measuring point is determined to be executed.

In a third aspect, embodiments herein provide a turbine bearing temperature protection device, including:

the detection module is used for detecting the temperature of corresponding temperature measuring points on each bearing bush of the turbine bearing in the operation process of the turbine;

the first judgment module is used for judging whether the temperature of the temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing;

the second judgment module is used for judging whether the temperature measuring point is a dead point or not, or judging whether the temperature rise rate corresponding to the temperature measuring point exceeds a preset threshold value or not;

and the determining module is used for determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the first judging module and/or the judgment result of the second judging module.

In a fourth aspect, embodiments herein provide a turbine bearing temperature protection device, including:

the detection module is used for detecting the temperature of a temperature measuring point corresponding to each bearing bush of the turbine bearing in the operation process of the turbine, each bearing bush comprises a first temperature measuring point and a second temperature measuring point, and the first temperature measuring point and the second temperature measuring point have temperature correlation;

the first judgment module is used for judging whether the temperature of the first temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing;

the second judgment module is used for judging whether the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the turbine bearing, wherein the alarm threshold is smaller than the action threshold;

and the determining module is used for determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the first judging module and the judgment result of the second judging module.

In a fifth aspect, an embodiment of the present specification provides an electronic device, including:

the turbine bearing temperature protection device according to the third or fourth aspect; or,

a processor and a memory and a computer program stored on and executable on the processor, the computer program when executed by the processor implementing the turbine bearing temperature protection method according to the first or second aspect.

In a sixth aspect, the present specification provides a computer readable storage medium, on which a computer program is stored, the computer program, when executed by a processor, implementing the method for temperature protection of a steam turbine bearing according to the first or second aspect.

The embodiment of the specification adopts at least one technical scheme which can achieve the following beneficial effects:

in the embodiment of the description, the temperature protection of the turbine bearing is executed by comprehensively considering the judgment of the overtemperature of the action threshold value, the judgment of the bad point of the temperature measuring point and/or the judgment of the temperature rise rate of the temperature measuring point, so that the reliability of the protection action is improved. So, through optimizing steam turbine bearing temperature protection action logic, can be under the equipment transformation circumstances not, effectively solved the problem that exists among the prior art, perfect steam turbine bearing temperature protection's setting, both guaranteed that action protection does not take place the circumstances of refusing the protection, greatly reduced action protection maloperation's number of times again, guaranteed the safety of unit, stable economic operation, and reduce the cost of optimizing the transformation.

In addition, for two temperature measuring points with larger temperature relevance on the bearing, the reliability of the temperature protection action of the turbine bearing can be further improved, unnecessary action protection shutdown operation is reduced, and the economic and safe operation of the mechanism is further ensured by mutually judging the two temperature measuring points, namely judging and outputting through the action threshold value of one measuring point and the alarm threshold value of the other measuring point.

Drawings

The accompanying drawings, which are included to provide a further understanding of the specification and are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and together with the description serve to explain the specification and not to limit the specification in a non-limiting sense. In the drawings:

FIG. 1 is a flow chart illustrating a method for protecting a turbine bearing temperature according to a first embodiment of the present disclosure.

FIG. 2 is a SAMA logic diagram of a turbine bearing temperature protection method according to a first embodiment of the present disclosure.

FIG. 3 is a SAMA logic diagram of a second embodiment of a method for protecting a turbine bearing temperature according to the present disclosure.

FIG. 4 is a flow chart illustrating a method for protecting a turbine bearing temperature according to a second embodiment of the present disclosure.

Fig. 5 is a block diagram showing the structure of a turbine bearing temperature protection device according to a first embodiment of the present disclosure.

Fig. 6 is a block diagram showing the structure of a turbine bearing temperature protection device according to a second embodiment of the present disclosure.

Fig. 7 is a block diagram of a hardware structure of an electronic device implementing various embodiments of the present specification.

Detailed Description

In order to make the objects, technical solutions and advantages of the present disclosure more clear, the technical solutions of the present disclosure will be clearly and completely described below with reference to the specific embodiments of the present disclosure and the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present specification without any creative effort belong to the protection scope of the present specification.

The technical solutions provided by the embodiments of the present description are described in detail below with reference to the accompanying drawings.

Referring now to FIG. 1, FIG. 1 is a flow chart illustrating a method for protecting turbine bearing temperature according to a first embodiment of the present disclosure.

As shown in fig. 1, the method comprises the steps of:

s102, detecting the temperature of corresponding temperature measuring points on each bearing bush of the turbine bearing in the operation process of the turbine.

The turbine bearing is composed of a plurality of bearing bushes, wherein temperature measuring points arranged on the bearing bushes are different according to the types of the bearing bushes. The bearing shells and temperature measurement points of a turbine bearing will be illustrated below for a steam turbine of a certain type.

Here, taking a 660MW unit CLZKN660-24.2/566/566 supercritical, one-time intermediate reheating, three-cylinder four-steam-exhaust and direct air condensing steam turbine of a certain plant as an example, the steam turbine has better variable load adaptability. The high, medium and low pressure rotors of the steam turbine all adopt a non-central hole alloy steel block forging rotor, all adopt a floor bearing, wherein the bearing comprises a No. 1 to 9 bearing bush and 4 thrust disc bearing bushes, wherein the No. 1 to 6 bearing bush is a four-pad tilting bush, the No. 7 to 8 bearing bush is a two-pad tilting bush, and the No. 9 bearing bush is not tilting.

In No. 1-6 bearing bushes of a four-pad tilting pad, the four-pad comprises two upper bearing pads and two lower bearing pads which are positioned on the left side and the right side respectively.

In a No. 7-9 bearing bush of a two-pad tilting pad, the two pads comprise an upper bearing pad and a lower bearing pad.

The temperature measuring points on the bearing bushes are distributed in such a way that 23 temperature measuring points of No. 1-9 bearing bushes exist, and 4 temperature measuring points on the thrust disc, namely, a total of 27 temperature measuring points participate in temperature protection. The 27 measuring points are all sent to a digital electro-hydraulic control system (DEH) of the steam turbine, wherein the 23 measuring points of the No. 1-9 bearing bush communicate the temperature of the measuring points to a Distributed Control System (DCS) through the DEH control system, and the temperature of the 4 measuring points of the thrust disc is sent to the DEH system and the DCS simultaneously. In addition, 9 oil return temperatures of No. 1-9 bearing bushes are sent to a DCS system.

Specifically, 2 temperature measuring points of the No. 1 bearing bush are respectively arranged on two bearing blocks of a lower bearing bush, and the two temperature measuring points are respectively arranged on the left and the right of the lower bearing bush; 2 temperature measuring points of the No. 2 bearing bush are respectively arranged on two bearing blocks of the lower bearing bush, and the two temperature measuring points are respectively arranged on the left and the right; the No. 3-6 bearing bushes are respectively arranged on two blocks of a lower bush at 4 temperatures, and two measuring points are distributed on each of the left and right blocks; no. 7-9 bearing bushes are arranged on the lower bush block at 1 temperature respectively.

In embodiments herein, the bearing shells of the steam turbine bearing may comprise at least one of a two-piece bearing shell, a four-piece bearing shell, and a thrust disc bearing shell.

Therefore, in step S102, the temperature of the temperature measurement point provided on each bearing shell can be detected in real time during the operation of the steam turbine.

And S104, judging whether the temperature of the detected temperature measuring point exceeds an action threshold value corresponding to the temperature protection action of the steam turbine bearing.

The action threshold is a numerical value used for determining whether to execute a shutdown protection action on the turbine bearing, and generally, once the temperature value of any one temperature measuring point of the bearing bush exceeds the action threshold, the operation of the whole turbine is stopped so as to protect the bearing of the turbine and ensure the safe operation of the unit.

In one embodiment, the setting of the turbine metal temperature over-temperature trip protection action can be combined with an alarm threshold and an action threshold of the turbine bearing bush metal temperature, and the setting is as follows:

and giving alarm information when the temperature of the bearing metal is not less than the alarm threshold, and executing temperature protection action when the temperature of the bearing metal is not less than the action threshold, namely stopping operating the steam turbine. The alarm threshold corresponding to the temperature measuring point on the same bearing is smaller than the action threshold, and the alarm thresholds or the action thresholds corresponding to different bearings may be the same or different.

For example, taking the above-mentioned steam turbine as an example, the alarm is given when the metal temperature of the No. 1-6 bearing is more than or equal to 107 ℃, and the temperature protection action is executed when the metal temperature of the No. 1-6 bearing is more than or equal to 113 ℃; alarming when the temperature of No. 7-9 bearing metal is more than or equal to 90 ℃, and executing temperature protection action when the temperature of No. 7-9 bearing metal is more than or equal to 100 ℃; and alarming when the temperature of the thrust disc bearing is more than or equal to 99 ℃, and executing temperature protection action when the temperature of the thrust disc bearing is more than or equal to 107 ℃.

Through the steps S102-S104, whether the temperature of the temperature measuring point on a certain bearing exceeds the corresponding action threshold value can be determined. According to the existing mode, when the temperature of any one temperature measuring point exceeds an action threshold value, a temperature protection action is usually executed, and the steam turbine is shut down. However, the temperature of the measuring point detected at this time may not truly reflect the current metal temperature of the bearing, and the temperature of the measuring point detected exceeds the temperature due to other faults.

For example, during the operation of the steam turbine, the temperature measuring elements at each temperature measuring point of the bearing bush are prone to have faults such as poor contact or broken lines, or the temperature of the measuring point is heated up too fast, so that the detected measuring point temperature exceeds an action threshold, and the metal temperature of the actual bearing does not reach the action threshold for executing the temperature protection action. If the shutdown protection action is executed, the times of misoperation shutdown are increased, serious potential safety hazards are brought to the unit, and the safe, stable and economic operation of the unit is influenced.

Therefore, the present specification embodiment also introduces step S106.

S106, judging whether the temperature measuring point is a dead point or not, or judging whether the temperature rising rate corresponding to the temperature measuring point exceeds a preset threshold value or not.

Whether the temperature measuring point is a bad point or not can be automatically detected by the system according to the quality standard of the measuring point, and the system can provide a prompt that the temperature measuring point is a bad point after detecting the bad point. The dead pixel judgment can be determined by adopting the existing dead pixel detection mode, and the details are not repeated here.

If the temperature measuring point is judged to be a dead spot, the temperature of the temperature measuring point detected in the step S102 is considered to be distorted, and is not the temperature for judging whether the temperature exceeds the action threshold.

When judging whether the temperature rising rate corresponding to the temperature measuring point exceeds a preset threshold value, firstly, the difference value between the current temperature of the temperature measuring point and the historical temperature before a preset period can be determined.

The predetermined period Δ t is a certain time interval in minutes or hours, and can be set as needed. After the current temperature value T1 of a certain temperature measuring point is detected, a measuring point historical temperature value T2 of a corresponding time point T2 after the predetermined period Δ T is subtracted forward from the current time point T1, wherein T2 is T1- Δ T.

Then, the difference Δ T between the current temperature value T1 corresponding to the current time point T1 and the historical temperature value T2 corresponding to the time point T2 is obtained as T1-T2.

According to the difference value DeltaT and the preset period Deltat, the heating rate corresponding to the temperature measuring point can be determined: v ═ Δ T/Δt (° c/s).

Then, the magnitude of the temperature rise rate V and a predetermined threshold value are compared. Normally, the metal temperature of the bearing will rise slowly, and the temperature change can be set to be not more than 3-10 ℃ for 1 minute or 60 seconds. In one embodiment, the predetermined threshold may be set between 3 and 10. And if the heating rate corresponding to the temperature measuring point is greater than the preset threshold, determining that the heating rate corresponding to the temperature measuring point exceeds the preset threshold.

In this case, the temperature at the temperature measurement point detected in step S102 may be distorted and is not a temperature for determining whether or not the operation threshold is exceeded.

And S108, determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the step S104 and/or the step S106.

In one embodiment, in the case where it is judged that the temperature measurement point is a bad point, it is determined that the temperature protection action of the turbine bearing is not performed on the temperature measurement point.

As described above, when the temperature measurement point is determined to be a defective point, the temperature of the temperature measurement point detected in step S102 is distorted and cannot be used as a temperature for determining whether or not the operation threshold is exceeded. At this time, no matter whether the detected temperature of the temperature measuring point exceeds the action threshold value, the temperature protection action is not executed, namely the machine does not stop.

In one embodiment, in the case that the temperature rise rate corresponding to the temperature measuring point is judged to exceed the preset threshold value, the temperature protection action of the turbine bearing is not executed on the temperature measuring point.

As described above, when it is determined that the temperature increase rate corresponding to the temperature measurement point exceeds the predetermined threshold, the temperature of the temperature measurement point detected in step S102 is distorted and cannot be used as the temperature for determining whether the temperature exceeds the operation threshold. At this time, no matter whether the detected temperature of the temperature measuring point exceeds the action threshold value, the temperature protection action is not executed, namely the machine does not stop.

In one embodiment, under the condition that the temperature measuring point is judged not to be a bad point and the temperature rise rate corresponding to the temperature measuring point does not exceed a preset threshold, if the temperature of the temperature measuring point does not exceed an action threshold corresponding to the execution of the temperature protection action of the turbine bearing, the temperature protection action of the turbine bearing is determined not to be executed on the temperature measuring point.

That is, at this time, the temperature of the temperature measurement point detected in step S102 truly reflects the metal temperature of the corresponding bearing, so if the temperature of the temperature measurement point does not exceed the operation threshold, the temperature protection operation is not performed, that is, the machine does not stop.

In one embodiment, under the condition that the temperature measuring point is judged not to be a bad point and the temperature rise rate corresponding to the temperature measuring point does not exceed a preset threshold, if the temperature of the temperature measuring point exceeds an action threshold corresponding to the execution of the temperature protection action of the steam turbine bearing, the execution of the temperature protection action of the steam turbine bearing on the temperature measuring point is determined.

That is, at this time, the temperature of the temperature measurement point detected in step S102 truly reflects the metal temperature of the corresponding bearing, so if the temperature of the temperature measurement point exceeds the operation threshold, the temperature protection operation, i.e., the shutdown, is performed.

As described above, the bearing of the steam turbine includes bearing shells that can be provided with 4 temperature measurement points, such as the No. 3-6 bearing shells and the thrust disc bearing shells of the above embodiments. In this type of bearing shell, there is a large temperature correlation between two temperature measurement points located on the same side of the same bearing shell. The temperature correlation means that the temperature values of two temperature measuring points are close to each other to a great extent and can reflect the same bearing temperature change trend, and if the detection temperature of one measuring point is high, the detection temperature of the other measuring point is basically high. The temperature of the measuring points of the two can be combined to represent the metal temperature of the corresponding bearing.

For example, for 4 temperature measuring points on each thrust disc bearing shell, the temperature correlation of two temperature measuring points on the front side working surface of the same thrust disc bearing shell is large; the temperature relevance of two temperature measuring points of the back non-working surface of the same thrust disc bearing bush is also large. 4 temperatures on No. 3-6 bearing bushes are respectively arranged on two pads of a lower pad, wherein each of the left pad and the right pad is provided with two temperature measuring points, so that the temperature relevance of the two temperature measuring points on the same pad is large.

In one embodiment, the bearing shell comprises a first temperature measuring point and a second temperature measuring point, and the first temperature measuring point and the second temperature measuring point have a temperature correlation. At this time, when it is determined in step S104 whether the temperature of the temperature measurement point exceeds an operation threshold corresponding to the execution of the temperature protection operation of the steam turbine bearing, it may be determined whether the temperature of the first temperature measurement point exceeds an operation threshold corresponding to the execution of the temperature protection operation of the steam turbine bearing; and judging whether the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the turbine bearing, wherein the alarm threshold is smaller than the action threshold.

Then, it is determined whether or not the temperature protection action of the steam turbine bearing is performed according to the judgment result of step S104 and the judgment result of step S106 of this embodiment.

Specifically, in the case that it is determined in step S104 that the temperature of the first temperature measurement point exceeds the operation threshold corresponding to the execution of the temperature protection operation of the turbine bearing, and the temperature of the second temperature measurement point does not exceed the alarm threshold corresponding to the execution of the temperature protection operation of the turbine bearing, if it is determined in step S106 that the temperature of the second temperature measurement point does not exceed the operation threshold corresponding to the execution of the temperature protection operation of the turbine bearing, it is determined that the temperature protection operation of the turbine bearing is not executed on the second temperature measurement point, that is, the turbine bearing is not stopped.

If the temperature of the second temperature measuring point is judged to exceed the action threshold value corresponding to the temperature protection action of the turbine bearing in step S106, the temperature protection action of the turbine bearing on the second temperature measuring point is determined to be executed, namely the turbine bearing is stopped.

That is, for two temperature measurement points with a greater correlation, if the current detected temperature of one of the temperature measurement points exceeds the action threshold, the protection action is not directly stopped, but the current detected temperature of the other temperature measurement point with the correlation is further considered. If the current detection temperature of the other temperature detection point does not exceed the alarm threshold, the temperature of the detection point with the current detection temperature exceeding the action threshold can be regarded as not exceeding the action threshold, so that the temperature protection action is not executed, and the shutdown action of the steam turbine is reduced.

And only under the condition that the current detection temperature of one of the measuring points exceeds the action threshold and the current detection temperature of the other temperature measuring point also exceeds the alarm threshold, the temperature of the measuring point with the current detection temperature exceeding the action threshold can be regarded as exceeding the action threshold, so that the temperature protection action is executed.

In the above embodiment, the mutual judgment is performed by two temperature measuring points with large temperature relevance on the bearing, that is, the judgment output is performed by the action threshold of one measuring point and the alarm threshold of the other measuring point, if one measuring point reaches the action threshold and the other measuring point does not reach the alarm threshold, it indicates that the possible overall temperature of the bearing does not reach the action threshold for executing the temperature protection action, and therefore, the temperature protection action may not be executed temporarily. Therefore, the reliability of the temperature protection action of the turbine bearing can be further improved, unnecessary action protection shutdown operation is reduced, and the safe, stable and economic operation of the unit is ensured.

As described above, the turbine bearings may include different types of bearings, and the alarm thresholds or action thresholds for the different bearings may be the same or different.

In one embodiment, the turbine bearing comprises a first bearing and a second bearing, the action threshold corresponding to the first bearing executing the temperature protection action is a first threshold, the action threshold corresponding to the second bearing executing the temperature protection action is a second threshold, and the first threshold is different from the second threshold.

At this time, step S108 determines whether to perform the temperature protection action of the steam turbine bearing according to the determination result of the above step S104 and/or S106 as follows:

and under the condition that the temperature measuring points are not bad points and the heating rate corresponding to the temperature measuring points does not exceed a preset threshold value in the step S106, if the temperature of the temperature measuring points corresponding to the first bearing exceeds the first threshold value or the temperature of the temperature measuring points corresponding to the second bearing exceeds the second threshold value in the step S104, determining to execute the temperature protection action of the turbine bearing on the corresponding temperature measuring points.

That is, when it is determined that there is no distortion of the temperature detected at the measurement point due to a fault, as long as there is a temperature at the measurement point of any bearing exceeding its corresponding operation threshold, a temperature protection operation is performed on the temperature measurement point, that is, the operation of the steam turbine is stopped.

In summary, in the embodiments of the present specification, the temperature protection of the turbine bearing is performed by comprehensively considering the action threshold overtemperature judgment, the temperature measurement point dead pixel judgment and/or the measurement point temperature rise rate judgment, so as to improve the reliability of the protection action. So, through optimizing steam turbine bearing temperature protection action logic, can be under the equipment transformation circumstances not, effectively solved the problem that exists among the prior art, perfect steam turbine bearing temperature protection's setting, both guaranteed that action protection does not take place the circumstances of refusing the protection, greatly reduced action protection maloperation's number of times again, guaranteed the safety of unit, stable economic operation, and reduce the cost of optimizing the transformation.

The logic for implementing the turbine bearing temperature protection method according to various embodiments of the present disclosure will be described with reference to fig. 2-3. Fig. 2 is a logic diagram of a SAMA of a method for protecting a turbine bearing temperature according to a first embodiment of the present specification, and fig. 3 is a logic diagram of a SAMA of a method for protecting a turbine bearing temperature according to a second embodiment of the present specification.

As shown in FIG. 2, the decision logic includes an action threshold decision 202, a rate change decision 206, and a dead pixel decision 208. It should be noted that in other embodiments, only the action threshold determination 202 and the rate change determination 206 may be included, or only the action threshold determination 202 and the dead pixel determination 208 may be included.

An action threshold determination 202 may be performed based on the current detected temperature of the current temperature measurement point, wherein if the determination exceeds the action threshold, "1" is output, otherwise, "0" is output.

The current detected temperature at the current temperature measurement point and the historical detected temperature before the predetermined period are respectively input to the rate change 205, so that the temperature rise rate of the current detected temperature can be obtained. Then, by the rate change determination 206, "1" is output if the determination exceeds a predetermined threshold, otherwise "0" is output.

In the dead pixel judgment 208, whether the current temperature measurement point is a dead pixel is judged, if the current temperature measurement point is judged to be a dead pixel, a "1" is output, and if not, a "0" is output.

Respectively inputting the output values of the rate change judgment 206 and the dead pixel judgment 208 into an or operation 210, and if any one of the output values of the rate change judgment 206 and the dead pixel judgment 208 is 1, namely any one of the abnormal conditions of dead pixel or too fast temperature rise exists, the output of the or operation 210 is '1'; if both the output values are 0, that is, if there is no dead pixel or abnormality of excessive temperature rise, the output of the or operation 210 is "0".

The output of the OR operation 210 may be directly connected to the input of a reset-Set (SR) flip-flop 214. in one embodiment, a delay logic 212 is provided between the OR operation 210 and the SR flip-flop 214 to prevent the value output by the OR operation from jittering and causing an error in the value input to the SR flip-flop 214. In one embodiment, the delay time may be set between 0.1 and 1 second. By delaying the output value of the stabilization OR operation 210, the input SR flip-flop 214 may be guaranteed to be the correct value.

When a certain temperature measuring point is judged to be a dead pixel or the temperature rise change rate of the temperature signal exceeds a certain preset threshold, the set end S of the SR flip-flop 214 outputs a value of '1'. The output of the SR flip-flop 214 is connected to an inverse operation 216, which performs an inverse operation on the output value of the SR flip-flop 214. Therefore, when the SR flip-flop 214 outputs a value of "1", the inverse operation 216 outputs a value of "0". At the moment, the unit is indicated to have a measuring point fault, and an abnormal alarm can be correspondingly sent out to remind related operation and maintenance personnel to process the fault.

As shown in fig. 2, since both the output value of the operation threshold determination 202 and the output value of the inverse operation 216 are input to the and operation 218, if the output value of the inverse operation 216 is "0" or the output value of the operation threshold determination 202 is "0", the output value of the and operation 218 is "0", which indicates that the temperature protection operation for the turbine bearing is not performed for the current temperature measurement point. Only when the output value of the inverse operation 216 and the output value of the action threshold judgment 202 are both "1", that is, the output value of the and operation 218 is "1", the temperature action protection, that is, the shutdown is performed on the current temperature measurement point.

It should be noted that the temperature protection action is not executed for the current temperature measuring point, and is determined only according to the judgment result of the current temperature measuring point. Because the bearing bush shaft of the bearing comprises a plurality of temperature measuring points, if other temperature measuring points are judged to need to execute temperature action protection according to the steps in the operation process of the steam turbine, the steam turbine still stops.

And under the condition that the temperature protection action is not executed on the current temperature measuring point, the temperature protection function of the temperature measuring point is automatically quitted, and the temperature protection functions of other temperature measuring points still exist. After the fault of the current temperature measuring point is eliminated, the reset end R of the SR flip-flop 214 can output a value of "0", so that the temperature action protection logic of the temperature measuring point is reset, and the temperature protection function of the temperature measuring point is put into operation again.

Referring now to FIG. 3, FIG. 3 is a SAMA logic diagram of a turbine bearing temperature protection method according to a second embodiment of the present disclosure.

The functions or logics of the action threshold determination 302, the historical temperature measurement point 304, the rate change 305, the rate change determination 306, the bad point determination 308, the or operation 310, the delay 321, the reset 313, the RS flip-flop 314, and the inverse operation 316 shown in fig. 3 are the same as those of the action threshold determination 202, the historical temperature measurement point 204, the rate change 205, the rate change determination 206, the bad point determination 208, the or operation 210, the delay 221, the reset 213, the RS flip-flop 214, and the inverse operation 216 corresponding to fig. 2 one to one, and are not described again.

The embodiment of FIG. 3 differs from the embodiment of FIG. 2 in that the embodiment of FIG. 2 only relates to the motion protection logic determination for a single temperature station, whereas the embodiment of FIG. 3 considers the logic for two temperature stations having a greater temperature correlation to determine each other.

Specifically, the subsequent logic module corresponding to the current detected temperature 2 is the same as the logic module corresponding to the current detected temperature in fig. 2, and the current detected temperature 2 is detected by a temperature measuring point on the bearing bush. The current detection temperature 1 is the detection temperature of another temperature measurement point on the bearing bush, which has a large temperature correlation with the temperature of the temperature measurement point. As mentioned above, the two temperature measuring points with large correlation are located on the same side of the same bearing bush, for example.

In this embodiment, the temperature action protection of the turbine bearing needs to consider whether the current detected temperature 1 exceeds the alarm threshold of the bearing where the corresponding measuring point is located, whether the current detected temperature 2 exceeds the action threshold of the bearing where the corresponding measuring point is located, and whether there are faults such as bad points or abnormal temperature rise rate change. The bearings corresponding to the two temperature measuring points are the same, and the alarm threshold value of the same bearing is smaller than the action threshold value, namely the alarm threshold value corresponding to the current detection temperature 1 is smaller than the action threshold value corresponding to the current detection temperature 2.

When the alarm threshold judgment 301 judges that the current detected temperature 1 exceeds the alarm threshold of the bearing where the corresponding measuring point is located, a numerical value of "1" is output. At this time, when the operation threshold determination 302 outputs the value "1" and the inverse operation 316 outputs the value "1", the operation 318 outputs the value "1", and the temperature operation protection, i.e., the shutdown, is performed on the temperature measurement point corresponding to the currently detected temperature 2.

If the alarm threshold judgment 301 judges that the current detected temperature 1 does not exceed the alarm threshold of the bearing where the corresponding measuring point is located, a value of '0' is output, and temperature action protection is not performed on the temperature measuring point corresponding to the current detected temperature 2. That is, even if the current detected temperature 2 exceeds the operation threshold for executing the temperature operation protection and the corresponding temperature measurement point does not have a fault such as a dead pixel or an abnormal temperature rise rate, if the current detected temperature 1 does not exceed the corresponding alarm threshold, the temperature operation protection will not be executed on the temperature measurement point.

As described above, the embodiment of fig. 1 proposes a method for executing a corresponding temperature protection action in combination with action threshold determination in the case that there may be a fault such as a dead spot or an excessive temperature rise rate at a temperature measurement point. In the embodiment of the present specification, a method for executing a corresponding temperature protection action by combining the alarm threshold and the action threshold determination of two temperature measurement points with temperature correlation without considering that there may be a dead point or an excessive temperature rise rate in a temperature measurement point, that is, there is no element fault in a default unit is also provided.

FIG. 4 is a flow chart of a method for protecting a turbine bearing temperature according to a second embodiment of the present disclosure, as shown in FIG. 4, including the following steps:

s402, in the operation process of the steam turbine, detecting the temperature of a temperature measuring point corresponding to each bearing bush of the steam turbine bearing, wherein each bearing bush comprises a first temperature measuring point and a second temperature measuring point, and the first temperature measuring point and the second temperature measuring point have temperature correlation.

S404, judging whether the temperature of the first temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing.

S406, judging whether the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the turbine bearing, wherein the alarm threshold is smaller than the action threshold.

And S408, determining whether to execute the temperature protection action of the turbine bearing according to the judgment results of the steps S404 and S406.

In one embodiment, in the case that the temperature of the first temperature measuring point is judged to exceed the action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing, and the temperature of the second temperature measuring point is judged not to exceed the alarm threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing, the temperature protection action of the steam turbine bearing is determined not to be executed on the first temperature measuring point.

For the specific manner of determining to execute the temperature protection action according to the alarm threshold and the action threshold of the two temperature measurement points with temperature correlation in this embodiment, reference may be made to the above description of the embodiment corresponding to fig. 3, and details are not repeated here.

In another embodiment of the present specification, there is further provided a turbine bearing temperature protection device, as shown in fig. 5, and fig. 5 is a block diagram illustrating a structure of the turbine bearing temperature protection device according to the first embodiment of the present specification.

The turbine bearing temperature protection device 2000 includes:

the detection module 2200 is used for detecting the temperature of a corresponding temperature measuring point on each bearing bush of the turbine bearing in the operation process of the turbine;

the first judging module 2400 is configured to judge whether the temperature of the temperature measuring point exceeds an action threshold corresponding to execution of a temperature protection action of the turbine bearing;

a second judging module 2600, configured to judge whether the temperature measurement point is a dead point, or judge whether a temperature rise rate corresponding to the temperature measurement point exceeds a predetermined threshold;

a determining module 2800, configured to determine whether to execute a temperature protection action of the steam turbine bearing according to a determination result of the first determining module and/or a determination result of the second determining module.

In one embodiment, the second determining module 2600 for determining whether the temperature rising rate corresponding to the temperature measurement point exceeds a predetermined threshold comprises: determining the difference value between the current temperature of the temperature measuring point and the historical temperature before a preset period; determining the heating rate of the temperature measuring point according to the difference and the preset period; comparing the temperature rise rate with the magnitude of the predetermined threshold; and under the condition that the temperature rise rate is greater than the preset threshold value, determining that the temperature rise rate corresponding to the temperature measuring point exceeds the preset threshold value.

In one embodiment, the determination module 2800 determines that the turbine bearing temperature protection action is not to be performed on the temperature measurement point if the second determination module 2600 determines that the temperature measurement point is a bad point.

In one embodiment, the determining module 2800 determines that the turbine bearing temperature protection action is not to be performed on the temperature measurement point if the second determining module 2600 determines that the temperature rise rate corresponding to the temperature measurement point exceeds a predetermined threshold.

In one embodiment, the determining module 2800 determines that the temperature protection action of the turbine bearing is not performed on the temperature measurement point if the first determining module 2400 determines that the temperature of the temperature measurement point does not exceed the action threshold corresponding to the temperature protection action of the turbine bearing when the second determining module 2600 determines that the temperature measurement point is not a bad point and the temperature rise rate corresponding to the temperature measurement point does not exceed the predetermined threshold.

In one embodiment, the determining module 2800 determines to perform the temperature protection action on the temperature measuring point if the first determining module 2400 determines that the temperature of the temperature measuring point exceeds the action threshold corresponding to the temperature protection action of the turbine bearing if the second determining module 2600 determines that the temperature measuring point is not a bad point and the temperature rise rate corresponding to the temperature measuring point does not exceed the predetermined threshold.

In one embodiment, the bearing shell includes a first temperature measuring point and a second temperature measuring point, and a temperature correlation exists between the first temperature measuring point and the second temperature measuring point, and the first determining module 2400 is configured to: judging whether the temperature of the first temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing; judging whether the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the turbine bearing, wherein the alarm threshold is smaller than the action threshold;

the determining module 2800 determines whether to perform the temperature protection operation of the steam turbine bearing according to the determination result of the first determining module 2400 and the determination result of the second determining module 2600.

In one embodiment, the judgment result of the first judgment module 2400 includes:

In one embodiment, the turbine bearing includes a first bearing and a second bearing, the first bearing performs the temperature protection action with a corresponding action threshold of a first threshold, the second bearing performs the temperature protection action with a corresponding action threshold of a second threshold, and the first threshold is different from the second threshold.

In one embodiment, the determining module 2800, according to the determination result of the first determining module 2400 and the determination result of the second determining module 2600, determining whether to perform the temperature protection action of the steam turbine bearing includes: under the condition that the second judging module 2600 judges that the temperature measuring point is not a bad point and the heating rate corresponding to the temperature measuring point does not exceed the predetermined threshold, if the first judging module 2400 judges that the temperature of the temperature measuring point corresponding to the first bearing exceeds the first threshold or judges that the temperature of the temperature measuring point corresponding to the second bearing exceeds the second threshold, it is determined that the temperature protection action of the steam turbine bearing is executed on the corresponding temperature measuring point.

The steam turbine bearing temperature protection device provided in the embodiments of the present description can implement each process implemented by the method embodiments of fig. 1 to fig. 3, and is not described here again to avoid repetition.

In still another embodiment of the present specification, there is further provided a turbine bearing temperature protection device, as shown in fig. 6, and fig. 6 is a block diagram illustrating a structure of the turbine bearing temperature protection device according to the second embodiment of the present specification.

The steam turbine bearing temperature protection device 3000 includes:

the detection module 3200 is used for detecting the temperature of a temperature measurement point corresponding to each bearing bush of the turbine bearing in the operation process of the turbine, wherein each bearing bush comprises a first temperature measurement point and a second temperature measurement point, and the first temperature measurement point and the second temperature measurement point have temperature correlation;

the first judging module 3400 is used for judging whether the temperature of the first temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing;

a second judging module 3600, configured to judge whether a temperature of the second temperature measurement point exceeds an alarm threshold corresponding to execution of a temperature protection action of the turbine bearing, where the alarm threshold is smaller than the action threshold;

a determining module 3800, configured to determine whether to perform a temperature protection operation of the steam turbine bearing according to a determination result of the first determining module 3400 and a determination result of the second determining module 3600.

The determining module 3800 determines whether to execute the temperature protection action of the steam turbine bearing according to the judgment result of the first judging module 3400 and the judgment result of the second judging module 3600, including:

and under the condition that the first judging module 3400 judges that the temperature of the first temperature measuring point exceeds an action threshold corresponding to the execution of the temperature protection action of the steam turbine bearing and the second judging module 3600 judges that the temperature of the second temperature measuring point does not exceed an alarm threshold corresponding to the execution of the temperature protection action of the steam turbine bearing, determining not to execute the temperature protection action of the steam turbine bearing on the first temperature measuring point.

In one embodiment, the determining module 3800 determining whether to execute the temperature protection action of the steam turbine bearing according to the judgment result of the first judging module 3400 and the judgment result of the second judging module 3600 includes:

and under the condition that the first judging module 3400 judges that the temperature of the first temperature measuring point exceeds an action threshold corresponding to the execution of the temperature protection action of the steam turbine bearing and the second judging module 3600 judges that the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the steam turbine bearing, determining to execute the temperature protection action of the steam turbine bearing on the first temperature measuring point.

The steam turbine bearing temperature protection device provided in the embodiment of the present specification can implement each process implemented by the method embodiment of fig. 4, and is not described here again to avoid repetition.

In an embodiment, according to still another embodiment of the present specification, an electronic device 4000 is further provided, and fig. 7 is a block diagram illustrating a hardware structure of an electronic device implementing various embodiments of the present specification.

In one aspect, the electronic device 4000 may include the turbine bearing temperature protection apparatus described above, for implementing the turbine bearing temperature protection method according to any embodiment of the present disclosure.

On the other hand, as shown in fig. 7, the electronic device 4000 may include a processor 4400, a memory 4200, and a computer program stored on the memory 4200 and capable of being executed on the processor 4400, where the computer program is executed by the processor 4400 to implement each process of the turbine bearing temperature protection method according to any of the foregoing embodiments, and achieve the same technical effect, and is not described herein again to avoid repetition.

Finally, according to another embodiment of the present specification, there is further provided a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the turbine bearing temperature protection method according to any of the foregoing embodiments, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.

As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, the description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The description has been presented with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the description. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, the description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The above description is only an example of the present disclosure, and is not intended to limit the present disclosure. Various modifications and alterations to this description will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification should be included in the scope of the claims of the present specification.

Claims

1. A temperature protection method for a turbine bearing is characterized by comprising the following steps:

d) determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the step b and/or the judgment result of the step c;

the bearing bush comprises a first temperature measuring point and a second temperature measuring point, temperature correlation exists between the first temperature measuring point and the second temperature measuring point, and the step b comprises the following steps:

b1) judging whether the temperature of the first temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the turbine bearing;

b2) judging whether the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the turbine bearing, wherein the alarm threshold is smaller than the action threshold;

wherein the step d comprises:

determining whether to execute the temperature protection action of the turbine bearing according to the judgment results of the steps b1 and b2 and the judgment result of the step c;

the judgment results of the steps b1 and b2 comprise:

2. The method of claim 1, wherein said determining whether the temperature rise rate corresponding to the temperature measurement point exceeds a predetermined threshold comprises:

determining the difference value between the current temperature of the temperature measuring point and the historical temperature before a preset period;

determining the heating rate of the temperature measuring point according to the difference and the preset period;

comparing the temperature rise rate with the magnitude of the predetermined threshold;

and under the condition that the temperature rise rate is greater than the preset threshold value, determining that the temperature rise rate corresponding to the temperature measuring point exceeds the preset threshold value.

3. The method of claim 1, wherein step d comprises:

and under the condition that the temperature measuring point is judged to be a dead spot, determining that the temperature protection action of the turbine bearing is not executed on the temperature measuring point.

4. The method of claim 1, wherein step d comprises:

and under the condition that the temperature rise rate corresponding to the temperature measuring point is judged to exceed a preset threshold value, determining that the temperature protection action of the turbine bearing is not executed on the temperature measuring point.

5. The method of claim 1, wherein step d comprises:

and under the condition that the temperature measuring point is judged not to be a dead spot and the heating rate corresponding to the temperature measuring point does not exceed a preset threshold, if the temperature of the temperature measuring point does not exceed an action threshold corresponding to the temperature protection action of the turbine bearing, determining that the temperature protection action of the turbine bearing is not executed on the temperature measuring point.

6. The method of claim 1, wherein step d comprises:

and under the condition that the temperature measuring point is judged not to be a dead spot and the heating rate corresponding to the temperature measuring point does not exceed a preset threshold, if the temperature of the temperature measuring point exceeds an action threshold corresponding to the execution of the temperature protection action of the turbine bearing, determining to execute the temperature protection action of the turbine bearing on the temperature measuring point.

7. The method of claim 1, wherein the turbine bearing comprises a first bearing and a second bearing, wherein a threshold of action for the first bearing to perform the temperature protection action is a first threshold, and wherein a threshold of action for the second bearing to perform the temperature protection action is a second threshold, and wherein the first threshold is different from the second threshold.

8. The method of claim 7, wherein step d comprises:

9. A temperature protection method for a turbine bearing is characterized by comprising the following steps:

d) determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the step b and the judgment result of the step c;

the step d comprises the following steps:

under the condition that the temperature of the first temperature measuring point is judged to exceed an action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing and the temperature of the second temperature measuring point is judged not to exceed an alarm threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing, determining not to execute the temperature protection action of the steam turbine bearing on the first temperature measuring point;

10. A turbine bearing temperature protection device, comprising:

the determining module is used for determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the first judging module and/or the judgment result of the second judging module;

the bearing bush comprises a first temperature measuring point and a second temperature measuring point, and temperature correlation exists between the first temperature measuring point and the second temperature measuring point;

the first judging module is further configured to judge whether the temperature of the first temperature measuring point exceeds an action threshold corresponding to execution of a temperature protection action of the turbine bearing;

judging whether the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the turbine bearing, wherein the alarm threshold is smaller than the action threshold;

the determining module determines whether to execute the temperature protection action of the turbine bearing according to the judgment result of the first judging module and the judgment result of the second judging module;

the judgment result of the first judgment module comprises: under the condition that the temperature of the first temperature measuring point is judged to exceed an action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing, and the temperature of the second temperature measuring point is judged not to exceed an alarm threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing, the temperature of the second temperature measuring point is judged not to exceed an action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing; and/or

11. A turbine bearing temperature protection device, comprising:

the determining module is used for determining whether to execute the temperature protection action of the turbine bearing according to the judgment result of the first judging module and the judgment result of the second judging module;

the determining module determines whether to execute the temperature protection action of the steam turbine bearing according to the judgment result of the first judging module and the judgment result of the second judging module, and comprises the following steps:

under the condition that the first judging module judges that the temperature of the first temperature measuring point exceeds an action threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing and the second judging module judges that the temperature of the second temperature measuring point does not exceed an alarm threshold value corresponding to the execution of the temperature protection action of the steam turbine bearing, determining not to execute the temperature protection action of the steam turbine bearing on the first temperature measuring point;

and under the condition that the first judging module judges that the temperature of the first temperature measuring point exceeds an action threshold corresponding to the execution of the temperature protection action of the steam turbine bearing and the second judging module judges that the temperature of the second temperature measuring point exceeds an alarm threshold corresponding to the execution of the temperature protection action of the steam turbine bearing, determining to execute the temperature protection action of the steam turbine bearing on the first temperature measuring point.

12. An electronic device, comprising:

the turbine bearing temperature protection device of claim 10 or 11; or,

a processor and a memory and a computer program stored on and executable on the processor, the computer program when executed by the processor implementing the turbine bearing temperature protection method of any one of claims 1 to 9.

13. A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the method of turbine bearing temperature protection according to any one of claims 1 to 9.