A method and system for temperature control of a thrust bearing of a TRT

Abstract

The application discloses a TRT thrust bearing temperature control method and system, and the method comprises the following steps: acquiring the actual load of a front cylinder and the actual load of a rear cylinder, calculating the ratio of the actual load of the front cylinder and the actual load of the rear cylinder as a load ratio, adjusting the oil amount of lubricating oil of a main thrust bearing bush and a secondary thrust bearing bush according to the load ratio, so that the ratio of the oil amount of lubricating oil of the main thrust bearing bush and the oil amount of lubricating oil of the secondary thrust bearing bush is equal to the load ratio, the oil amount of lubricating oil of the main thrust bearing bush is increased, the cooling effect of the main thrust bearing is improved, the problem that the TRT is shut down for maintenance due to the excessively high temperature of the main thrust bearing is avoided, the power generation efficiency of the TRT is improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature control, in particular to a TRT thrust bearing temperature control method and system. BACKGROUND

[0002] TRT (Blast Furnace Top Gas Recovery Turbine Unit) is a kind of high pressure gas power generation equipment of blast furnace, which mainly uses the pressure energy and heat energy of the by-product of blast furnace smelting, i.e. high pressure gas of blast furnace, to make the gas do work through turbine expander, and then converts the mechanical energy into electric energy.

[0003] In the full load operation of the blast furnace, the TRT can only reduce the equipment failure and keep stable operation to achieve high efficiency power generation function. However, when the temperature of the thrust bearing of the TRT exceeds 105℃, the TRT will be forced to stop running in order to protect the safe operation of the whole TRT equipment. The unplanned shutdown and maintenance of the TRT caused by the high temperature of the thrust bearing seriously affects the power generation efficiency of the TRT of the steel plant and increases the maintenance cost. SUMMARY

[0004] The present application provides a TRT thrust bearing temperature control method and system, which can improve the cooling effect of the main thrust bearing, avoid the problem of TRT shutdown and maintenance caused by the high temperature of the main thrust bearing, improve the power generation efficiency of the TRT, and reduce the maintenance cost.

[0005] In a first aspect, the present application provides a TRT thrust bearing temperature control method, the TRT comprising a front cylinder and a rear cylinder, the method comprising:

[0006] obtaining the actual load of the front cylinder and the actual load of the rear cylinder;

[0007] calculating the ratio of the actual load of the front cylinder to the actual load of the rear cylinder as a load ratio;

[0008] adjusting the oil amount of the lubricating oil of the main thrust bearing and the lubricating oil of the auxiliary thrust bearing according to the load ratio, so that the ratio of the oil amount of the lubricating oil of the main thrust bearing to the oil amount of the lubricating oil of the auxiliary thrust bearing is equal to the load ratio.

[0009] Optionally, the method further comprises:

[0010] obtaining the temperature of the thrust bearing;

[0011] when the temperature of the thrust bearing decreases by a preset value, the oil amount of the lubricating oil of the main thrust bearing is increased by a first preset value per hour until a first safety threshold is reached;

[0012] The temperature of the thrust bearing is decreased by a preset value, and the oil amount of the lubricating oil of the auxiliary thrust bush is reduced by a second preset value per hour until a second safety threshold is reached.

[0013] Optionally, the main thrust bush and the auxiliary thrust bush are scraped, and the oil groove depth is adjusted.

[0014] Optionally, after scraping, the contact surface balance between the bearing and the bush is required to be greater than or equal to 75%, and the adjusted oil groove depth is 0.01mm-0.06mm.

[0015] Optionally, the front cylinder and the rear cylinder are communicated through a balance pipe, an adjusting valve is arranged on the balance pipe, a bypass pipe is arranged between the gas inlet of the front cylinder and the gas outlet of the rear cylinder, and a pressure regulating valve is arranged on the bypass pipe.

[0016] Obtain the gas pressure of the blast furnace top;

[0017] Determine whether the gas pressure of the blast furnace top is greater than a preset gas pressure value;

[0018] When the pressure regulating valve is opened and the gas pressure of the blast furnace top is greater than the preset gas pressure value, control the adjusting valve to open a first preset opening degree to communicate the front cylinder and the rear cylinder.

[0019] After the pressure regulating valve is closed for a preset time length, control the adjusting valve to be closed.

[0020] Optionally, the method further comprises:

[0021] Obtain the coal gas flow of the bag-type dust collector inlet;

[0022] Determine whether the coal gas flow is greater than a first preset flow, the first preset flow being greater than the average value of the coal gas flow in a preset time period before the current time;

[0023] If yes, control the adjusting valve to open a second preset opening degree to communicate the front cylinder and the rear cylinder;

[0024] After the coal gas flow of the bag-type dust collector inlet returns to normal for a preset time length, control the opening degree of the adjusting valve to decrease to a third preset opening degree;

[0025] When the pressure regulating valve is closed, control the adjusting valve to be closed.

[0026] Optionally, the method further comprises:

[0027] Determine whether the coal gas flow is greater than a second preset flow, the second preset flow being greater than the first preset flow;

[0028] If yes, the control valve is controlled to open a fourth preset opening degree, the fourth preset opening degree is greater than the second preset opening degree, and the front cylinder and the rear cylinder are communicated.

[0029] In a second aspect, the embodiment of the present application also provides a TRT thrust bearing temperature control system, comprising:

[0030] A blast furnace for generating blast furnace gas;

[0031] A gravity dust collector communicated with the blast furnace through a pipeline;

[0032] A bag filter communicated with the gravity dust collector through a pipeline;

[0033] A front cylinder, an air inlet of the front cylinder being connected with the bag filter;

[0034] A rear cylinder, an air outlet of the front cylinder being connected with an air inlet of the rear cylinder;

[0035] A generator, a rotating shaft of the generator being connected with a rotating shaft of the rear cylinder through a thrust bearing;

[0036] An oil amount distributor arranged at an oil inlet groove of the auxiliary thrust bearing, for adjusting the oil amount of the lubricating oil of the main thrust bearing and the auxiliary thrust bearing.

[0037] Optionally, the front cylinder and the rear cylinder are also communicated through a balance pipe, an adjusting valve is arranged on the balance pipe, a bypass pipe is arranged between the air inlet of the front cylinder and the air outlet of the rear cylinder, and a pressure regulating valve is arranged on the bypass pipe.

[0038] Optionally, a gas pressure sensor is arranged on a top of the blast furnace, a first flow meter is arranged on an air inlet of the bag filter, and a second flow meter is arranged on an air inlet of the front cylinder.

[0039] The TRT thrust bearing temperature control method provided by the present application comprises the following steps: obtaining actual loads of a front cylinder and a rear cylinder, calculating a load ratio of the actual load of the front cylinder and the actual load of the rear cylinder, adjusting the oil amount of the lubricating oil of the main thrust bearing and the auxiliary thrust bearing according to the load ratio, and making the ratio of the oil amount of the lubricating oil of the main thrust bearing to the oil amount of the lubricating oil of the auxiliary thrust bearing equal to the load ratio. BRIEF DESCRIPTION OF DRAWINGS

[0040] The present application will be further described in detail below according to the drawings and embodiments.

[0041] Figure 1A flow chart of a TRT thrust bearing temperature control method provided by an embodiment of the present application is shown in the figure;

[0042] Figure 2 A structural schematic diagram of a TRT thrust bearing temperature control system provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0043] To make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0044] In the description of the present application, unless explicitly defined and limited otherwise, the terms “connected”, “connected”, “fixed” should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the present application, unless explicitly defined and limited otherwise, the first feature “on” or “under” the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature “on”, “above” and “on” the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature “under”, “below” and “under” the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature. In addition, the terms “first”, “second” are only used to distinguish in the description, and have no special meaning.

[0046] Figure 1 A flow chart of a TRT thrust bearing temperature control method provided by an embodiment of the present application is shown in the figure, Figure 1 As shown in the figure, the TRT thrust bearing temperature control method comprises the following steps:

[0047] S101, obtaining the actual load of the front cylinder and the actual load of the rear cylinder.

[0048] In the embodiment of the present application, the TRT comprises a front cylinder, a rear cylinder and a generator and the like, and the front cylinder and the rear cylinder are both used to convert the heat energy and pressure energy of the blast furnace generated gas into mechanical energy, so as to drive the generator to rotate and generate electricity. The front cylinder is closer to the blast furnace and has a larger load and a higher temperature during the working process. The gas after working in the front cylinder enters the rear cylinder and continues to work in the rear cylinder, so as to convert the remaining heat energy and pressure energy into mechanical energy, thereby improving the energy conversion efficiency.

[0049] In the embodiment of the present application, the actual load of the front cylinder and the actual load of the rear cylinder are obtained when the TRT is working. The actual load can be represented by calculating the power of the gas working, that is, the product of the gas pressure in the cylinder, the contact area of the piston and the moving distance of the piston.

[0050] S102, the ratio of the actual load of the front cylinder to the actual load of the rear cylinder is calculated as a load ratio.

[0051] After obtaining the actual load of the front cylinder and the actual load of the rear cylinder, the ratio of the actual load of the front cylinder to the actual load of the rear cylinder is calculated as a load ratio.

[0052] S103, the oil amount of the lubricating oil of the main thrust bearing and the oil amount of the lubricating oil of the auxiliary thrust bearing are adjusted according to the load ratio, so that the ratio of the oil amount of the lubricating oil of the main thrust bearing to the oil amount of the lubricating oil of the auxiliary thrust bearing is equal to the load ratio.

[0053] The thrust bearing comprises a main thrust bearing and an auxiliary thrust bearing. During normal working, the axial force is directed to the low pressure end. The thrust bearing bearing the axial force in this direction is called the main thrust bearing. During starting, load reduction and shutdown, the axial thrust changes direction, which is called the reverse thrust. The bearing bearing this force is called the auxiliary thrust bearing.

[0054] Because the load of the front cylinder during the working process is usually larger than the load of the rear cylinder, the temperature of the main thrust bearing is usually higher than the temperature of the auxiliary thrust bearing in practice. If no intervention is made, the temperature of the main thrust bearing will become higher and higher. When the temperature of the main thrust bearing is higher than the safety temperature (for example, 105 DEG C), the TRT will be forced to stop for maintenance in order to protect the safe operation of the whole TRT device.

[0055] In the embodiment of the present application, the oil amount of the lubricating oil of the main thrust bearing and the oil amount of the lubricating oil of the auxiliary thrust bearing are adjusted according to the actual load of the front cylinder and the actual load of the rear cylinder, so that the ratio of the oil amount of the lubricating oil of the main thrust bearing to the oil amount of the lubricating oil of the auxiliary thrust bearing is equal to the load ratio. That is, the larger the actual load of the front cylinder, the larger the oil amount of the lubricating oil of the main thrust bearing, and the better the cooling effect of the main thrust bearing, thereby reducing the temperature difference between the main thrust bearing and the auxiliary thrust bearing, avoiding the problem that the TRT is stopped for maintenance due to the excessively high temperature of the main thrust bearing, improving the power generation efficiency of the TRT and reducing the maintenance cost.

[0056] The TRT thrust bearing temperature control method provided by the embodiment of the present application comprises: obtaining the actual load of the front cylinder and the actual load of the rear cylinder, calculating the ratio of the actual load of the front cylinder to the actual load of the rear cylinder as a load ratio, adjusting the oil amount of the lubricating oil of the main thrust bearing bush and the lubricating oil of the auxiliary thrust bearing bush according to the load ratio, and making the ratio of the oil amount of the lubricating oil of the main thrust bearing bush to the oil amount of the lubricating oil of the auxiliary thrust bearing bush equal to the load ratio. The oil amount of the lubricating oil of the main thrust bearing bush is increased, the cooling effect of the main thrust bearing is improved, the problem that the TRT is shut down for maintenance due to the excessively high temperature of the main thrust bearing is avoided, the power generation efficiency of the TRT is improved, and the maintenance cost is reduced.

[0057] In some embodiments of the present application, when the temperature of the thrust bearing decreases, the oil amount of the lubricating oil of the main thrust bearing bush and the lubricating oil of the auxiliary thrust bearing bush can be adjusted according to the temperature drop. For example, the temperature of the thrust bearing is obtained, and when the temperature of the thrust bearing decreases by a preset value, the oil amount of the lubricating oil of the main thrust bearing bush is increased by a first preset value per hour until a first safety threshold is reached, and when the temperature of the thrust bearing decreases by the preset value, the oil amount of the lubricating oil of the auxiliary thrust bearing bush is reduced by a second preset value per hour until a second safety threshold is reached, and the second preset value is greater than the first preset value. For example, when the temperature of the bearing decreases by 1℃, the oil amount of the lubricating oil of the auxiliary thrust bearing bush is reduced by 3.5-4% per hour, and the oil amount of the lubricating oil of the main thrust bearing bush is increased by 2-2.3% per hour.

[0058] In some embodiments of the present application, according to the running state of the thrust bearing (including the main thrust bearing bush and the auxiliary thrust bearing bush) during the working process, the thrust bearing can be scraped and the oil groove depth can be adjusted when the machine is shut down, so as to achieve the purpose of stabilizing the oil film thickness and balance between the bearing and the bearing bush and controlling and stabilizing the temperature field of the bearing bush. After scraping, the balance degree of the contact surface between the bearing and the bearing bush is required to be greater than or equal to 75%, and the oil groove depth control requirement is 0.01mm-0.06mm.

[0059] In some embodiments of the present application, the front cylinder and the rear cylinder are communicated through a balance pipe, an adjusting valve is arranged on the balance pipe, a bypass pipe is arranged between the gas inlet of the front cylinder and the gas outlet of the rear cylinder, and a pressure regulating valve is arranged on the bypass pipe. The adjusting valve is controllable, the front cylinder and the rear cylinder are communicated through the balance pipe, and the pressure regulating valve is used for pressure relief. For example, when the gas pressure in the pipeline is greater than a safety threshold, the pressure regulating valve is opened to release pressure through the bypass pipe. In the embodiment of the present application, when the gas pressure in the pipeline increases rapidly, the adjusting valve can be controlled to be opened, the balance pipe is communicated with the front cylinder and the rear cylinder, the pressure difference between the front cylinder and the rear cylinder is balanced, and the bearing force of the thrust bearing is reduced to avoid rapid temperature rise of the thrust bearing. For example, the TRT thrust bearing temperature control method further comprises:

[0060] 1. Obtain the gas pressure of the top of the blast furnace.

[0061] For example, a gas pressure sensor can be arranged on the top of the blast furnace to collect the gas pressure of the top of the blast furnace.

[0062] 2. Determine whether the gas pressure of the blast furnace top is greater than a preset gas pressure value.

[0063] For example, the collected gas pressure of the blast furnace top is compared with the preset gas pressure value, and it is determined whether the gas pressure of the blast furnace top is greater than the preset gas pressure value (for example, 5 KPa).

[0064] 3. When the pressure regulating valve is opened and the gas pressure of the blast furnace top is greater than the preset gas pressure value, the control valve is controlled to open a first preset opening degree to connect the front cylinder and the rear cylinder.

[0065] When the pressure regulating valve is opened, it indicates that the gas pressure in the pipeline is relatively large at this time, and pressure relief is needed. At this time, the pressure cannot be reduced by pressure relief. Therefore, when the pressure regulating valve is opened and the gas pressure of the blast furnace top is greater than the preset gas pressure value, the control valve is controlled to open a first preset opening degree (5%-10% opening degree) to connect the front cylinder and the rear cylinder, so as to quickly divert the part of the coal gas in the front cylinder that does not participate in work to the rear cylinder, timely adjust the pressure difference between the front cylinder and the rear cylinder, reduce the bearing force of the thrust bearing, avoid rapid temperature rise of the thrust bearing, and slow down the impact force on the front cylinder, effectively protect the stability of the equipment, and reduce the equipment failure rate.

[0066] 4. After the pressure regulating valve is closed for a preset time, the control valve is controlled to be closed.

[0067] After pressure relief, the gas pressure in the pipeline decreases, the pressure regulating valve is closed, and after the pressure regulating valve is closed for a preset time (5-10 seconds), the control valve is controlled to be closed.

[0068] In some embodiments of the present application, the control valve can also be controlled based on the coal gas flow at the inlet of the bag-type dust collector to achieve the purpose of adjusting the pressure difference between the front cylinder and the rear cylinder, reducing the bearing force of the thrust bearing, and avoiding rapid temperature rise of the thrust bearing. For example, the TRT thrust bearing temperature control method further comprises:

[0069] 1. Obtain the coal gas flow at the inlet of the bag-type dust collector.

[0070] The bag-type dust collector is a dry dust filtering device, which is suitable for capturing fine, dry, and non-fibrous dust. The bag-type dust collector is made of woven filter cloth or non-woven felt, and uses the filtering effect of the fiber fabric to filter dust-containing gas. When the dust-containing gas enters the bag-type dust collector, the dust with large particles and high specific gravity is settled down due to the action of gravity and falls into the ash bucket. The gas containing fine dust is filtered through the filter material, and the dust is blocked, so that the gas is purified. For example, in some embodiments of the present application, a flowmeter can be arranged at the inlet of the bag-type dust collector to obtain the coal gas flow at the inlet of the bag-type dust collector.

[0071] 2. determining whether the gas flow is greater than a first preset flow, the first preset flow being greater than an average of the gas flow in a preset time period before the current time.

[0072] The collected gas flow is compared with the first preset flow, and it is determined whether the gas flow is greater than the first preset flow, wherein the first preset flow is greater than an average of the gas flow in a preset time period before the current time. Exemplarily, the first preset flow can be 110%-120% of the average of the gas flow in the previous 30 minutes.

[0073] 3. When the pressure regulating valve is opened and the gas flow is greater than the first preset flow, the control valve is controlled to open a second preset opening degree to connect the front cylinder and the rear cylinder.

[0074] The opening of the pressure regulating valve indicates that the gas pressure in the pipeline is relatively large at this time, and pressure relief is needed. At this time, the pressure cannot be reduced by pressure relief. Therefore, when the pressure regulating valve is opened and the gas flow is greater than the first preset flow, the control valve is controlled to open a second preset opening degree (for example, 20%-40% opening degree) to connect the front cylinder and the rear cylinder, and the part of the gas flow that does not participate in work in the front cylinder is directly connected to the rear cylinder, so as to timely adjust the pressure difference between the front cylinder and the rear cylinder, reduce the bearing force of the thrust bearing, avoid rapid temperature rise of the thrust bearing, and slow down the impact force on the front cylinder, thereby effectively protecting the stability of the equipment and reducing the equipment failure rate.

[0075] 4. After a preset time period after the gas flow at the inlet of the bag-type dust collector returns to normal, the opening degree of the control valve is reduced to a third preset opening degree.

[0076] With the stable operation of the blast furnace, the gas flow in the pipeline returns to normal. After a preset time period (5s-10s) after the gas flow at the inlet of the bag-type dust collector returns to normal, the opening degree of the control valve is reduced to a third preset opening degree (5%-10% opening degree).

[0077] 5. When the pressure regulating valve is closed, the control valve is controlled to be closed.

[0078] After pressure relief, the gas pressure in the pipeline decreases, and the pressure regulating valve is closed. When the pressure regulating valve is closed, the control valve is controlled to be closed.

[0079] Further, the TRT thrust bearing temperature control method further comprises:

[0080] 1. Obtaining the gas flow at the inlet of the bag-type dust collector.

[0081] Exemplarily, in some embodiments of the present application, a flowmeter can be arranged at the inlet of the bag-type dust collector to obtain the gas flow at the inlet of the bag-type dust collector.

[0082] 2. determining whether the gas flow is greater than a second preset flow rate, the second preset flow rate being greater than the first preset flow rate.

[0083] The collected gas flow is compared with the second preset flow rate, and it is determined whether the gas flow is greater than the second preset flow rate, wherein the second preset flow rate is greater than the first preset flow rate. For example, the second preset flow rate can be 130% of the average value of the gas flow in the previous 30 minutes.

[0084] 3. When the pressure regulating valve is opened and the gas flow is greater than the second preset flow rate, the regulating valve is controlled to open a fourth preset opening degree to connect the front cylinder and the rear cylinder.

[0085] When the pressure regulating valve is opened, it indicates that the gas pressure in the pipeline is relatively large at this time, and pressure relief is needed. At this time, the pressure cannot be reduced by pressure relief. Therefore, when the pressure regulating valve is opened and the gas flow is greater than the second preset flow rate, the regulating valve is controlled to open a fourth preset opening degree (for example, 50%-100% opening degree) to connect the front cylinder and the rear cylinder, so that the part of the gas flow that does not participate in work in the front cylinder is directly connected to the rear cylinder in the shortest time, the pressure difference between the front cylinder and the rear cylinder is adjusted in time, the bearing force of the thrust bearing is reduced, the temperature of the thrust bearing is prevented from rising rapidly, the impact force on the front cylinder is reduced, the stability of the equipment is effectively protected, and the equipment failure rate is reduced.

[0086] 4. After the gas flow at the inlet of the bag-type dust collector returns to normal for a preset time, the opening degree of the regulating valve is reduced to a third preset opening degree.

[0087] With the stable operation of the blast furnace, the gas flow in the pipeline returns to normal, and after the gas flow at the inlet of the bag-type dust collector returns to normal for a preset time (5s-10s), the opening degree of the regulating valve is reduced to a third preset opening degree (5%-10% opening degree).

[0088] 5. When the pressure regulating valve is closed, the regulating valve is controlled to be closed.

[0089] After pressure relief, the gas pressure in the pipeline decreases, and the pressure regulating valve is closed. When the pressure regulating valve is closed, the regulating valve is controlled to be closed.

[0090] The TRT thrust bearing temperature control method provided by the embodiment of the application can keep the TRT thrust bearing temperature below 70℃ for a long time, can improve the synchronous operation rate of the unit to 98-99%, can increase the TRT power generation by 5-8%, and can adapt to abnormal operation of the blast furnace and meet the demand for adjusting the top pressure of the blast furnace.

[0091] The application also provides a TRT thrust bearing temperature control system, Figure 2 The structure diagram of the TRT thrust bearing temperature control system provided by the embodiment of the application is shown in the figure, Figure 2As shown, the TRT thrust bearing temperature control system includes:

[0092] A blast furnace 110 for generating high-temperature and high-pressure coal gas.

[0093] A gravity dust collector 120 in communication with the blast furnace 110 through a pipe. The gravity dust collector 120 removes dust by suddenly reducing the flow rate and changing the flow direction of the gas stream, and large particles of dust are separated from the gas under the action of gravity and inertial force and settle to the bottom of the dust collector cone.

[0094] A bag filter 130 in communication with the gravity dust collector 120 through a pipe. The bag filter is a dry dust filtering device suitable for capturing fine, dry, and non-fibrous dust. The bag filter is made of woven filter cloth or non-woven felt, and uses the filtering effect of the fiber fabric to filter dust-containing gas. When dust-containing gas enters the bag filter, large and heavy dust particles settle down under the action of gravity and fall into the ash hopper. The gas containing fine dust is filtered through the filter material, and the dust is blocked, so that the gas is purified.

[0095] A front cylinder 140, the gas inlet of which is connected to the bag filter 130.

[0096] A rear cylinder 150, the gas inlet of which is connected to the gas outlet of the front cylinder 140.

[0097] A generator 160, the rotating shaft of which is connected to the rotating shaft of the rear cylinder 150 through a thrust bearing 170.

[0098] An oil distributor, which is arranged at the oil inlet groove of the auxiliary thrust bearing (not shown in the figure) and is used to adjust the amount of lubricating oil for the main thrust bearing and the auxiliary thrust bearing.

[0099] Specifically, the TRT includes a front cylinder 140, a rear cylinder 150, a generator 160, and a thrust bearing 170. The front cylinder 140 and the rear cylinder 150 are both used to convert the heat energy and pressure energy of the coal gas generated by the blast furnace into mechanical energy, thereby driving the generator 160 to rotate and generate electricity. The thrust bearing 170 is used to bear the axial load.

[0100] In the embodiment of the present application, when the TRT is working, the actual load of the front cylinder 140 and the actual load of the rear cylinder 150 are obtained, the ratio of the actual load of the front cylinder 140 to the actual load of the rear cylinder 150 is calculated as a load ratio, and the oil amount distributor is controlled according to the actual load of the front cylinder 140 and the actual load of the rear cylinder 150 to adjust the oil amount of the lubricating oil of the main thrust bearing and the lubricating oil of the auxiliary thrust bearing, so that the ratio of the oil amount of the lubricating oil of the main thrust bearing to the oil amount of the lubricating oil of the auxiliary thrust bearing is equal to the load ratio, the oil amount of the lubricating oil of the main thrust bearing is increased, the cooling effect of the main thrust bearing is improved, the problem of TRT shutdown for maintenance caused by the excessively high temperature of the main thrust bearing is avoided, the power generation efficiency of the TRT is improved, and the maintenance cost is reduced.

[0101] In some embodiments of the present application, as shown in Figure 2 The front cylinder 140 and the rear cylinder 150 are also communicated through a balance pipe, an adjusting valve 191 is arranged on the balance pipe, a bypass pipe is arranged between the gas inlet of the front cylinder 140 and the gas outlet of the rear cylinder 150, and a pressure regulating valve 192 is arranged on the bypass pipe.

[0102] In some embodiments of the present application, as shown in Figure 2 A gas pressure sensor 193 is arranged on the top of the blast furnace 110, a first flowmeter 194 is arranged on the gas inlet of the bag-type dust collector 130, and a second flowmeter 195 is arranged on the gas inlet of the front cylinder 140. The gas pressure sensor 193 is used to collect the gas pressure on the top of the blast furnace 110, the first flowmeter 194 is used to collect the gas flow of the gas inlet of the bag-type dust collector 130, and the second flowmeter 195 is used to collect the gas flow of the gas inlet of the front cylinder 140.

[0103] For example, when the gas pressure in the pipeline is greater than a safety threshold value, the pressure regulating valve 192 is opened to release pressure through the bypass pipe. When the gas pressure on the top of the blast furnace increases rapidly, the adjusting valve 191 can be controlled to be opened to communicate the front cylinder 140 and the rear cylinder 150 through the balance pipe, balance the pressure difference between the front cylinder 140 and the rear cylinder 150, and reduce the bearing force of the thrust bearing 170 to avoid rapid temperature rise of the thrust bearing 170. The specific control process has been described in detail in the foregoing embodiments, and will not be described here again.

[0104] In the embodiment of the present application, the adjusting valve can also be controlled based on the gas flow of the gas inlet of the bag-type dust collector 130 to achieve the purpose of adjusting the pressure difference between the front cylinder 140 and the rear cylinder 150, reducing the bearing force of the thrust bearing 170, and avoiding rapid temperature rise of the thrust bearing 170. The specific control process has been described in detail in the foregoing embodiments, and will not be described here again.

[0105] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like, are terms of reference based on the orientation or position shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0106] In the description of the present application, the description referring to the terms "an embodiment", "an example", and the like, means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0107] In addition, it should be understood that although the present application is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the present application is only for the sake of clarity, and those skilled in the art should consider the present application as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0108] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations here, those skilled in the art can think of other specific embodiments of the present application without having to exert creative labor, and these embodiments will fall within the scope of protection of the present application.

Claims

1. A TRT thrust bearing temperature control method, characterized by, The TRT includes a front cylinder and a rear cylinder, and the method includes: obtaining the actual load of the front cylinder and the actual load of the rear cylinder; calculating the ratio of the actual load of the front cylinder to the actual load of the rear cylinder as a load ratio; adjusting the oil amount of the lubricating oil of the main thrust bearing and the auxiliary thrust bearing according to the load ratio, so that the ratio of the oil amount of the lubricating oil of the main thrust bearing to the oil amount of the lubricating oil of the auxiliary thrust bearing is equal to the load ratio; The TRT thrust bearing temperature control method further includes: obtaining the temperature of the thrust bearing; When the temperature of the thrust bearing decreases by a preset value, the oil amount of the lubricating oil of the main thrust bearing is controlled to increase by a first preset value per hour until a first safety threshold is reached; When the temperature of the thrust bearing decreases by a preset value, the oil amount of the lubricating oil of the auxiliary thrust bearing is controlled to decrease by a second preset value per hour until a second safety threshold is reached.

2. The TRT thrust bearing temperature control method of claim 1, wherein, The main thrust bearing and the auxiliary thrust bearing are scraped, and the oil groove depth is adjusted.

3. The TRT thrust bearing temperature control method of claim 2, wherein, After scraping, the contact surface balance between the bearing and the bearing pad is required to be greater than or equal to 75%, and the adjusted oil groove depth is 0.01mm-0.06mm.

4. The TRT thrust bearing temperature control method of any one of claims 1-3, wherein, The front cylinder and the rear cylinder are communicated through a balance pipe, an adjusting valve is arranged on the balance pipe, a bypass pipe is arranged between the gas inlet of the front cylinder and the gas outlet of the rear cylinder, a pressure regulating valve is arranged on the bypass pipe, and the method further includes: obtaining the gas pressure at the top of the blast furnace; determining whether the gas pressure at the top of the blast furnace is greater than a preset gas pressure value; When the pressure regulating valve is opened and the gas pressure at the top of the blast furnace is greater than the preset gas pressure value, the adjusting valve is controlled to open at a first preset opening degree to communicate the front cylinder and the rear cylinder; After the pressure regulating valve is closed for a preset period of time, the adjusting valve is controlled to be closed.

5. The TRT thrust bearing temperature control method of claim 4, wherein, Further including: obtaining the gas flow at the inlet of the bag-type dust collector; determining whether the gas flow is greater than a first preset flow, which is greater than the average value of the gas flow in a preset period of time before the current time; If yes, the adjusting valve is controlled to open at a second preset opening degree to communicate the front cylinder and the rear cylinder; After the gas flow at the inlet of the bag-type dust collector returns to normal for a preset period of time, the opening degree of the adjusting valve is reduced to a third preset opening degree; When the pressure regulating valve is closed, the adjusting valve is controlled to be closed.

6. The TRT thrust bearing temperature control method of claim 5, wherein, Further including: determining whether the gas flow is greater than a second preset flow, which is greater than the first preset flow; If yes, the adjusting valve is controlled to open at a fourth preset opening degree to communicate the front cylinder and the rear cylinder, and the fourth preset opening degree is greater than the second preset opening degree.

7. A TRT thrust bearing temperature control system characterized by, The system for executing the TRT thrust bearing temperature control method of any one of claims 1-6 includes: a blast furnace for generating blast furnace gas; a gravity dust collector communicated with the blast furnace through a pipeline; a bag-type dust collector communicated with the gravity dust collector through a pipeline; a front cylinder, the gas inlet of which is connected with the bag-type dust collector; a rear cylinder, the gas inlet of which is connected with the gas outlet of the front cylinder; a generator, the rotating shaft of which is connected with the rotating shaft of the rear cylinder through a thrust bearing; An oil amount distributor is arranged at an oil inlet groove of the auxiliary bearing bush for adjusting the oil amount of the lubricating oil of the main bearing bush and the auxiliary bearing bush.

8. The TRT thrust bearing temperature control system of claim 7, wherein, The front cylinder and the rear cylinder are also communicated through a balance pipe, an adjusting valve is arranged on the balance pipe, a bypass pipe is arranged between the air inlet of the front cylinder and the air outlet of the rear cylinder, and a pressure regulating valve is arranged on the bypass pipe.

9. The TRT thrust bearing temperature control system of claim 7, wherein, The blast furnace is provided with an air pressure sensor, the air inlet of the bag-type dust collector is provided with a first flowmeter, and the air inlet of the front cylinder is provided with a second flowmeter.

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