A steam turbine tilting pad sliding bearing lubricating oil device and oil temperature regulation method

Abstract

The present invention relates to a lubricating oil device and oil temperature regulation method for a tilting pad sliding bearing of a steam turbine. The lubricating oil device includes an oil inlet pipe and an oil supply pipe; a mounting portion is provided at the oil outlet end of the oil inlet pipe, the mounting portion having a rotating hole; the oil supply pipe is rotatably mounted on the rotating hole, and an oil injection hole is provided on the outer wall of the oil supply pipe; a rotating block is provided on the outer wall of the oil supply pipe, a mounting groove is provided on the inner wall of the rotating hole, an arcuate groove coaxial with the rotating hole is provided in the mounting groove, a sliding end of the rotating block is slidably mounted on the arcuate groove, and the mounting groove is divided into a supporting groove and a driving groove along the circumference of the rotating hole; an elastic member is provided in the supporting groove, one end of the elastic member is connected to the groove wall of the driving groove away from the rotating block, and the other end abuts the rotating block; the driving groove is filled with a driving body, and the driving body abuts the rotating block. The present invention can automatically regulate the temperature of the lubricating oil, has the characteristics of rapidity and high reliability, and can meet the requirements of rapid load changes of coal-fired power units in new power systems.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbines, in particular to a lubricating oil device for a tilting pad sliding bearing of a steam turbine and an oil temperature regulating method. Background Art

[0002] To meet the rapid peak-shaving requirements of new power systems for coal-fired power units, as well as the intermittent and fluctuating nature of wind and solar power, coal-fired units frequently operate at ultra-low loads and with rapidly varying loads. This leads to unstable oil films between turbine rotors and bearings, and frequent large fluctuations in shaft vibration, seriously impacting the safe and stable operation of the units. The pressure and temperature of the bearing lubricant play a crucial role in maintaining the oil film. Excessively high lubricant temperature can cause a decrease in oil viscosity, thinning the oil film and making it prone to rupture. This can lead to localized oil film damage, lubrication failure, reduced bearing load capacity, and even carbonization of the lubricant, resulting in bearing burns. Excessively low lubricant temperature can increase oil viscosity, thickening the oil film, increasing friction, and increasing bearing power consumption. This can also cause oil film vibration, leading to increased turbine vibration.

[0003] Therefore, ensuring the lubricating oil maintains appropriate temperature and sufficient supply pressure to maintain proper viscosity is crucial for preventing oil film rupture, bearing wear, and large shaft vibration fluctuations. However, conventional bearing lubricating oil temperature is regulated by increasing the coolant flow rate using a lubricating oil cooling system. This results in slow regulation and an inability to adapt to the rapid load changes required by the unit. To address these issues, the present invention provides a lubricating oil device and oil temperature regulation method for a tilting pad bearing in a steam turbine. Summary of the Invention

[0004] The present invention provides a steam turbine tilting pad sliding bearing lubricating oil device and oil temperature regulation method, which can automatically regulate the lubricating oil temperature, has the characteristics of rapidity and high reliability, and can adapt to the demand for rapid load changes of coal-fired power units in new power systems.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A steam turbine tilting pad sliding bearing lubricating oil device is installed between two adjacent pads in the tilting pad sliding bearing and is used to supply oil to the bearing and form an oil film under the drive of the rotor. It includes an oil inlet pipe and an oil supply pipe.

[0007] The oil outlet end of the oil inlet pipe is provided with a mounting portion, the mounting portion is provided with a rotation hole, and the axis of the rotation hole is perpendicular to the axial direction of the oil supply pipe;

[0008] The oil supply pipe is rotatably mounted on the rotating hole, the inner cavity of the oil supply pipe is connected to the oil inlet pipe, and an oil injection hole is provided on the outer wall of the oil supply pipe located outside the rotating hole;

[0009] A rotating block is provided on the outer wall of the oil supply pipe located in the rotating hole, and a mounting groove is provided on the inner wall of the rotating hole. An arcuate groove coaxial with the rotating hole is provided in the mounting groove. The sliding end of the rotating block is slidably provided on the arcuate groove, and the mounting groove is divided into a supporting groove and a driving groove along the circumference of the rotating hole.

[0010] An elastic member is provided in the supporting groove, one end of the elastic member is connected to the groove wall of the driving groove away from the rotating block, and the other end is in contact with the rotating block;

[0011] The driving groove is filled with a driving body, and the driving body abuts against the rotating shift block;

[0012] The volume of the driving body becomes larger to drive the rotating block to rotate in the opposite direction, so that the oil injection hole rotates toward the oil inlet side of the tile, or the volume becomes smaller. Under the drive of the elastic member, the rotating block rotates in the forward direction, so that the oil injection hole rotates toward the center of the rotor.

[0013] Preferably, the driving body is a thermosensitive body made of a thermosensitive material, and the volume of the thermosensitive body changes under the influence of the oil film temperature;

[0014] The above-mentioned heat sensitive body can be one of antimony, bismuth and gallium.

[0015] Preferably, the driving body is lubricating oil, and a communicating hole is provided on the outer side wall of the oil supply pipe close to the rotating shift block, so that the inner cavity of the oil supply pipe is in communication with the driving groove.

[0016] Preferably, the oil supply pipe is provided with a first oil inlet hole at the lower portion of the rotating hole, and the inner side wall of the rotating hole is provided with a second oil inlet hole communicating with the inner cavity of the oil inlet pipe, and the second oil inlet hole is communicated with the first oil inlet hole;

[0017] During the rotation of the oil supply pipe, the projection of the second oil inlet hole on a plane perpendicular to the axis of the oil inlet pipe is always located within the projection of the first oil inlet hole on a plane perpendicular to the axis of the oil inlet pipe.

[0018] Preferably, annular blocks are provided on both sides of the rotating hole, and an annular boss is provided in the middle of the oil supply pipe. The annular blocks cooperate with the annular boss to seal both ends of the rotating hole.

[0019] Preferably, the above-mentioned mounting part includes an upper mounting part and a lower mounting part, the above-mentioned lower mounting part is arranged at the upper end part of the above-mentioned oil inlet pipe, the above-mentioned upper mounting part and the above-mentioned lower mounting part are detachably connected, and the above-mentioned upper mounting part and the above-mentioned lower mounting part form the above-mentioned rotating hole and the above-mentioned annular boss.

[0020] An oil temperature regulation method based on the above-mentioned steam turbine tilting pad sliding bearing lubricating oil device comprises:

[0021] Collect the oil film operating temperature and compare it with the preset temperature;

[0022] If the oil film temperature is within the preset temperature threshold range, the sliding end of the movable shift block is located in the middle of the arc groove, and the spray direction of the oil injection hole of the oil supply pipe is located between the oil inlet side inlet of the block and the center of the rotor, the lubricating oil device maintains this state of operation;

[0023] If the oil film temperature is higher than the preset temperature, the volume of the driving body increases, and the driving body drives the rotating block to rotate in the opposite direction, driving the oil supply pipe to rotate in the opposite direction, so that the oil injection hole rotates toward the oil inlet side of the shoe until the collected oil film temperature is within the preset temperature threshold range;

[0024] If the oil film temperature is lower than the preset temperature, the volume of the driving body is reduced, and the elastic member drives the rotating shift block to rotate forward, driving the oil supply pipe to rotate forward, so that the oil injection hole rotates toward the center of the rotor until the collected oil film temperature is within the preset temperature threshold range.

[0025] Preferably, the driving body is a thermosensitive body made of thermosensitive material, and the method includes:

[0026] If the oil film temperature is higher than the preset temperature, the thermistor will be affected by the oil film temperature and automatically expand, making the volume of the thermistor larger. The thermistor will drive the rotating block to rotate in the opposite direction, driving the oil supply pipe to rotate in the opposite direction, so that the oil injection hole will rotate towards the oil inlet side of the block until the collected oil film temperature is within the preset temperature threshold range;

[0027] If the oil film temperature is lower than the preset temperature, the thermistor will be affected by the oil film temperature and automatically shrink, making the volume of the thermistor smaller. The elastic part drives the rotating shift block to rotate forward, driving the oil supply pipe to rotate forward, causing the oil injection hole to rotate toward the center of the rotor until the collected oil film temperature is within the preset temperature threshold range and stops.

[0028] Preferably, the driving body is lubricating oil, and the method includes:

[0029] If the oil film temperature is lower than the preset temperature, the power of the lubricating oil pump is increased, the oil pressure is increased, the lubricating oil in the inner cavity of the oil supply pipe continuously flows into the driving groove, the volume of the lubricating oil in the driving groove is increased, the rotating shift block is driven to rotate in the opposite direction, and the oil supply pipe is driven to rotate in the opposite direction, so that the oil injection hole rotates toward the oil inlet side of the shoe until the collected oil film temperature is within the preset temperature threshold range;

[0030] If the oil film temperature is lower than the preset temperature, the power of the lubricating oil pump is reduced, the oil pressure is lowered, and the elastic member drives the rotating shift block to rotate forward, causing the lubricating oil in the drive groove to flow out into the oil supply pipe. The volume of the lubricating oil in the drive groove is reduced. At the same time, the rotating shift block drives the oil supply pipe to rotate forward, causing the oil injection hole to rotate toward the center of the rotor until the collected oil film temperature is within the preset temperature threshold range.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The driving body can automatically adjust its volume according to the oil film temperature or oil pressure, so that with the cooperation of the elastic part, the rotating shift block rotates, the oil supply pipe rotates, and the direction of the oil injection hole is adjusted. Compared with the traditional method, it can automatically adjust the lubricating oil temperature, has the characteristics of fast speed and high reliability, can adapt to the needs of rapid load changes of coal-fired power units under new power systems, and has good oil film stability in the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is an overall schematic diagram of the tilting pad sliding bearing of this embodiment of the present invention;

[0035] Figure 2 Schematic cross-sectional view of the lubricating oil device of this embodiment of the present invention (the driving body is a heat-sensitive body);

[0036] Figure 3 Schematic cross-sectional view of a lubricating oil device according to another embodiment of the present invention (the driving body is lubricating oil);

[0037] Figure 4 This is a schematic diagram of a lubricating oil device according to this embodiment of the present invention;

[0038] Figure 5 This is a partial schematic diagram of the lubricating oil device in this embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Upper tile body; 2. Lower tile body; 3. Tiles; 4. Oil retaining ring; 5. Lubricating oil device; 6. Oil inlet pipe; 7. Oil supply pipe; 71. Oil injection hole; 72. First oil inlet hole; 73. Connecting hole; 8. Mounting part; 81. Upper mounting part; 82. Lower mounting part; 83. Rotating hole; 84. Annular stopper; 85. Second oil inlet hole; 86. Mounting groove; 861. Arc groove; 862. Driving groove; 863. Support groove; 9. Rotating shift block; 10. Elastic member; 11. Driving body. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] like Figure 1As shown, in the prior art, the tilting pad sliding bearing generally includes a pad body, a pad block 3 and an oil retaining ring 4. The pad body includes an upper pad body 1 and a lower pad body 2. The upper pad body 1 and the lower pad body 2 are fixedly connected by bolts. Several pad blocks 3 are evenly installed on the inner ring of the upper pad body 1 and the lower pad body 2. The pad blocks 3 are movably fixed on the inner ring of the pad body by the side center axial locating pin, so as to achieve slight radial swing, absorb the unbalanced force of the rotor, and improve the stability of the shaft system. The oil retaining ring 4 is arranged on both sides of the axial direction of the pad body to block the axial splashing of the top shaft oil and the lubricating oil. The gap between the two pad blocks 3 is provided with a lubricating oil device 5 for maintaining the oil film and controlling the oil temperature and oil pressure. However, the current lubricating oil device 5, its oil spray hole 71 is generally fixed in a fixed direction, toward the center of the rotor. The change of oil temperature can only be adjusted by the lubricating oil cooling system by increasing the coolant flow rate. There are problems such as slow adjustment speed and inability to adapt to the rapid load change requirements of the unit.

[0045] In order to solve the above problems, Figure 2-Figure 5 As shown, an embodiment of the present invention provides a lubricating oil device for a tilting pad sliding bearing of a steam turbine, wherein the lubricating oil device 5 is installed in the gap between two adjacent pads 3 for oil supply, and specifically comprises an oil inlet pipe 6 and an oil supply pipe 7, wherein the oil outlet end of the oil inlet pipe 6 is provided with a mounting portion 8, and the mounting portion 8 is provided with a rotating hole 83, wherein the rotating hole 83 is connected to the oil supply inner cavity of the oil inlet pipe 6, and the axis of the rotating hole 83 is perpendicular to the axis of the oil inlet pipe 6, so that the rotating hole 83 is arranged perpendicular to the oil inlet pipe 6, which is convenient for machining, and correspondingly, the middle part of the oil supply pipe 7 is rotated and sealed. On the rotating hole 83, the sealing can adopt the existing sealing means, such as adding an annular sealing ring, etc. The two ends of the oil supply pipe 7 are located outside the rotating hole 83, and the inner cavity of the oil supply pipe 7 is connected with the oil inlet pipe 6, so that the oil inlet pipe 6 supplies lubricating oil to the oil supply pipe 7. An oil injection hole 71 is provided on the outer wall of the oil supply pipe 7 located outside the rotating hole 83. By rotating the oil supply pipe 7 around the axis of the rotating hole 83, the direction of the oil injection hole 71 can be changed, and the oil injection hole 71 is rotated toward the area between the oil inlet side inlet of the block 3 and the center of the rotor, thereby improving the temperature of the oil film.

[0046] Specifically, in actual use, the optimal temperature is when the oil film temperature is within the specified preset temperature range. At this time, the operation of the entire bearing is relatively stable and its service life will be increased. At this time, the oil injection hole 71 is directed toward the middle area between the oil inlet side inlet of the tile 3 and the center of the rotor; when the oil film temperature is too high, the oil injection hole 71 can be rotated toward the oil inlet side inlet of the tile 3. When it is rotated to a certain position, the entry direction of the lubricating oil will be biased toward the oil inlet side inlet of the tile 3, thereby away from the center of the rotor. The lubricating oil forms an oil film under the rotation of the rotor. The temperature of the lubricating oil that initially forms the oil film will be relatively low. During continuous operation, the overall oil film temperature will be improved and reduced, so that the oil film temperature drops to a specified value. It can be known that It is known that the closer the oil injection hole 71 is to the oil inlet side inlet of the tile 3, the lower the oil film temperature finally formed will be relative to before adjustment; when the oil film temperature is too low, the oil injection hole 71 can be rotated toward the center of the rotor, and rotated to a certain position, so that more lubricating oil is directly sprayed onto the rotor, and then driven by the rotation of the rotor to enter the space between the tile 3 and the rotor to form an oil film. Since the turbine rotor is driven by high-temperature steam, the temperature of the rotor itself is relatively high, so that the temperature of the lubricating oil that initially forms the oil film will be relatively high. During continuous operation, the overall oil film temperature will be improved and increased, so that the oil film temperature will rise to a specified value. It can be known that the closer the oil injection hole 71 is to the center of the rotor, the higher the oil film temperature finally formed will be relative to before adjustment.

[0047] Specifically, the specific structure that enables the oil supply pipe 7 and the fuel injection pipe to rotate is as follows: a rotating block 9 is fixedly connected to the outer wall of the oil supply pipe 7 located inside the rotating hole 83, wherein the inner wall of the rotating hole 83 is provided with a mounting groove 86, which is arranged in an arc shape and is coaxial with the rotating hole 83, and an arc groove 861 coaxial with the rotating hole 83 is provided in the mounting groove 86, and the rotating block 9 is slidably arranged on the arc groove 861 at the end away from the oil supply pipe 7, so that the rotating block 9 can only move around the rotating hole 8 on the arc groove 861. 3 is rotated circumferentially to drive the oil supply pipe 7 to rotate, wherein the rotating block 9 divides the mounting groove 86 into a supporting groove 863 and a driving groove 862 along the circumferential direction of the rotating hole 83, and under the sealing of the outer wall of the oil supply pipe 7, the supporting groove 863 and the driving groove 862 are two relatively sealed spaces, and an elastic member 10 is provided in the supporting groove 863. The elastic member 10 can be an arc spring, wherein one end of the elastic member 10 is connected to the groove wall of the driving groove 862 away from the rotating block 9, and the other end abuts against the side wall of the rotating block 9. Correspondingly, when the driving The movable groove 862 is filled with a driving body 11, which is in contact with the rotating block 9. The volume of the driving body 11 can be increased or decreased under the influence of the external oil temperature or oil pressure, so that the volume of the driving groove 862 will be increased or decreased. Specifically, the volume of the driving body 11 increases, the driving groove 862 increases, and the rotating block 9 can be driven to rotate in the opposite direction, the support groove 863 becomes smaller, the elastic member 10 is compressed, and the rotating block 9 drives the oil supply pipe 7 to rotate, so that the oil injection hole 71 rotates toward the oil inlet side of the tile 3. Specifically, the rotation The position is determined according to the oil film temperature and the specified preset temperature. When the oil film temperature is within the specified preset temperature range, the rotation stops, or the volume of the driving body 11 becomes smaller, and the driving groove 862 becomes smaller. Under the drive of the elastic member 10, the rotating shift block 9 rotates in the positive direction, and the supporting groove 863 becomes larger. The rotating shift block 9 drives the oil supply pipe 7 to rotate, so that the oil injection hole 71 rotates toward the center of the rotor. The specific rotation position is determined according to the oil film temperature and the specified preset temperature. When the oil film temperature is within the specified preset temperature range, the rotation stops.

[0048] The above-mentioned driving body 11 can automatically adjust its volume according to the oil film temperature or oil pressure, so that under the cooperation of the elastic member 10, the rotating shift block 9 is rotated, the oil supply pipe 7 is rotated, and the direction of the oil injection hole 71 is adjusted, so that the direction of the oil injection hole 71 is continuously changed between the oil inlet side inlet of the block 3 and the center of the rotor, thereby reducing or increasing the oil film temperature. Compared with the traditional method, it can automatically adjust the lubricating oil temperature, has the characteristics of fast speed and high reliability, can adapt to the needs of rapid load changes of coal-fired power units under new power systems, and has good oil film stability in the bearing.

[0049] Specifically, in this embodiment, the driver 11 is a thermosensitive body made of a thermosensitive material. The volume of the thermosensitive body varies depending on the oil film temperature. Because the mounting portion 8 is located between the two tiles 3 and its exterior contacts the oil film, heat conduction heats the thermosensitive body within the drive slot 862. The volume of the thermosensitive body changes in accordance with the external oil film temperature. As the oil film temperature increases, the volume of the thermosensitive body increases, while as the oil film temperature decreases, the volume of the thermosensitive body decreases. Furthermore, the mounting portion 8 is an annular structure with an arc-shaped outer wall, resulting in a thinner and uniform bottom wall of the drive slot 862. This ensures more uniform thermal contact and improved heat resistance for the thermosensitive body. Specifically, the thermosensitive body can be made of antimony, bismuth, gallium, or the like.

[0050] Specifically, in another embodiment, the driving body 11 can be lubricating oil, and a connecting hole 73 is provided on the outer wall of the oil supply pipe 7 near the rotating shift block 9, so that the inner cavity of the oil supply pipe 7 is connected with the driving groove 862. When the lubricating oil device 5 is in use, the lubricating oil enters the oil supply pipe 7 from the oil inlet pipe 6, and then is supplied to the bearing from the inner cavity of the oil supply pipe 7 through the oil injection pipe. At the same time, the lubricating oil in the inner cavity of the oil supply pipe 7 will enter the driving groove 862 from the connecting hole 73. The lubricating oil fills the driving groove 862, which will continuously apply pressure to the rotating shift block 9. Under the action of the elastic member 10, the rotating shift block 9 is in a balanced state. Once As the oil pressure increases, the lubricating oil will continue to flow into the driving groove 862, causing the volume of the driving groove 862 to increase, forcing the rotating shift block 9 to slide in the arc groove 861, and compressing the elastic member 10, causing the oil injection hole 71 to rotate toward the oil inlet side entrance of the tile 3. Once the oil pressure decreases, the elastic member 10 will force the rotating shift block 9 to slide in the arc groove 861, and the lubricating oil will flow out of the driving groove 862 under the action of the elastic member 10. The volume of the driving groove 862 is reduced, the oil supply pipe 7 rotates, and the oil injection hole 71 rotates toward the center of the rotor, thereby achieving the purpose of using lubricating oil and adjusting the direction of the oil injection hole 71 by oil pressure.

[0051] Specifically, a first oil inlet hole 72 is provided at the lower part of the oil supply pipe 7 located at the rotating hole 83, and a second oil inlet hole 85 connected to the inner cavity of the oil inlet pipe 6 is provided on the inner wall of the rotating hole 83. The second oil inlet hole 85 is connected to the first oil inlet hole 72, so that the lubricating oil in the oil inlet pipe 6 enters the oil supply pipe 7, and during the rotation of the oil supply pipe 7, the projection of the second oil inlet hole 85 on the plane perpendicular to the axis of the oil inlet pipe 6 is always located within the projection of the first oil inlet hole 72 on the plane perpendicular to the axis of the oil inlet pipe 6, thereby ensuring that the oil inlet aperture of the second oil inlet hole 85 does not change, ensuring that the oil pressure entering the oil supply pipe 7 is stable, and ensuring the oil injection rate of the oil injection hole 71, and the oil pressure does not change greatly due to the change of the oil inlet aperture of the oil supply pipe 7 caused by the rotation of the oil supply pipe 7.

[0052] Specifically, annular blocks 84 are provided on both sides of the rotating hole 83 , and correspondingly, an annular boss is provided in the middle of the oil supply pipe 7 . The annular blocks 84 cooperate with the annular boss to strengthen the rotating seal of the oil supply pipe 7 .

[0053] Specifically, the mounting portion 8 includes an upper mounting portion 81 and a lower mounting portion 82. The lower mounting portion 82 is integrally arranged at the upper end of the oil inlet pipe 6. The upper mounting portion 81 and the lower mounting portion 82 are detachably connected to facilitate the installation of the oil supply pipe 7 on the rotating hole 83. Moreover, semicircular through grooves are provided inside the upper mounting portion 81 and the lower mounting portion 82, and semicircular annular blocks 84 are provided at the ends of the through grooves. After the upper mounting portion 81 and the lower mounting portion 82 are connected, a rotating hole 83 and an annular boss are formed.

[0054] An embodiment of the present invention further provides an oil temperature regulation method, which is implemented based on the above-mentioned steam turbine tilting pad sliding bearing lubricating oil device, and specifically includes:

[0055] First, the oil film operating temperature is collected and compared with a preset temperature. Specifically, the collection of the oil film temperature may be a prior art technique, but in this embodiment, an inclined slot is provided within the pad 3, and a temperature sensor is installed within the slot for detecting the temperature. The end of the inclined slot is located at the center of the pad 3. Since the oil film between the pad 3 and the rotor is thinnest at the center of the pad 3, the highest temperature of the pad 3, i.e., the highest temperature of the oil film, can be monitored. This preset temperature is generally a temperature value determined artificially through extensive experimentation and is within a threshold range. When the oil film is at the preset temperature, the bearing can operate more stably.

[0056] After the oil film operating temperature is compared with the preset temperature, there are several situations. The first one is: if the oil film temperature is within the threshold range of the preset temperature, the sliding end of the movable shift block is generally located in the middle position of the arc groove 861, and the injection direction of the oil injection hole 71 of the oil supply pipe 7 is located between the oil inlet side inlet of the block 3 and the center of the rotor, and the lubricating oil device 5 can maintain this state and continue to operate; the second one is: if the oil film temperature is higher than the preset temperature, that is, higher than the maximum value of the preset temperature, the volume of the driving body 11 is increased, and the driving body 11 drives the rotating shift block 9 to rotate in the opposite direction, driving the oil supply pipe 7 in the opposite direction. Rotate so that the oil injection hole 71 rotates toward the oil inlet side inlet of the tile 3, so that the initial temperature of the oil film formed by the lubricating oil is lower, so that the oil film temperature after operation can reach the threshold range of the preset temperature, and then stop rotating; the third type: if the oil film temperature is lower than the preset temperature, that is, lower than the minimum value of the preset temperature, the volume of the driving body 11 is reduced, and the elastic member 10 drives the rotating shift block 9 to rotate forward, driving the oil supply pipe 7 to rotate forward, so that the oil injection hole 71 rotates toward the center of the rotor until the collected oil film temperature is within the threshold range of the preset temperature.

[0057] It can be known that the rotation speed of the above-mentioned rotor is very fast, so the temperature of the oil film is constantly changing, so the rotation of the entire oil supply pipe 7 is also continuous. Correspondingly, a lubricating oil device 5 is provided between every two adjacent tiles 3, and each tile 3 is provided with a temperature measuring component (that is, the above-mentioned temperature sensor, installed in the chute). As long as the value of the temperature measuring component in the corresponding tile 3 is within the threshold range of the preset temperature, the oil supply pipe 7 in the lubricating oil device 5 next to the tile 3 also maintains the corresponding working state unchanged. Once the value of the temperature measuring component is not within the threshold range of the preset temperature, the oil supply pipe 7 in the lubricating oil device 5 next to the tile 3 rotates accordingly.

[0058] In the above method, the traditional method of oil injection hole 71 cannot be adjusted, and the temperature can only be adjusted through the lubricating oil cooling system. The adjustment speed is slow, which is not conducive to timely response and cannot adapt to the needs of rapid load changes of coal-fired power units under the new power system, resulting in poor oil film stability, friction, and large vibration fluctuations.

[0059] Specifically, in this embodiment, the driver 11 is a thermosensitive body made of a thermosensitive material. The method specifically includes: if the oil film temperature is greater than a preset temperature, i.e., greater than the maximum preset temperature, the thermosensitive body automatically expands under the influence of the oil film temperature, causing the thermosensitive body to increase in volume. The thermosensitive body then drives the rotating block 9 to rotate in the opposite direction, driving the oil supply pipe 7 to rotate in the opposite direction, causing the oil injection hole 71 to rotate toward the oil inlet of the shoe 3 until the measured oil film temperature falls within the preset temperature threshold. If the oil film temperature is less than the preset temperature, i.e., less than the minimum preset temperature, the thermosensitive body automatically contracts under the influence of the oil film temperature, causing the thermosensitive body to decrease in volume. The elastic member 10 drives the rotating block 9 to rotate forward, driving the oil supply pipe 7 to rotate forward, causing the oil injection hole 71 to rotate toward the rotor center until the measured oil film temperature falls within the preset temperature threshold. The advantage of using a thermosensitive body as the driver 11 is that it can automatically adjust according to the oil film temperature, without requiring excessive intervention, and providing a more timely response.

[0060] In another embodiment, the driving body 11 is lubricating oil, and the method specifically includes: if the oil film temperature is lower than the preset temperature, that is, greater than the maximum value of the preset temperature, the power of the lubricating oil pump can be increased to increase the oil pressure, and the lubricating oil in the inner cavity of the oil supply pipe 7 continues to flow into the driving groove 862, the volume of the lubricating oil in the driving groove 862 increases, and the rotating block 9 is driven to rotate in the opposite direction, driving the oil supply pipe 7 to rotate in the opposite direction, so that the oil injection hole 71 rotates toward the oil inlet side inlet of the block 3 until the collected oil film temperature is within the threshold range of the preset temperature; if the oil film temperature is lower than the preset temperature, that is, lower than the minimum value of the preset temperature, the power of the lubricating oil pump is reduced, the oil pressure is reduced, and the elastic member 10 drives the rotating block 9 to rotate forward, so that the lubricating oil in the driving groove 862 flows out to the oil supply pipe 7, the volume of the lubricating oil in the driving groove 862 is reduced, and at the same time, the rotating block 9 drives the oil supply pipe 7 to rotate forward, so that the oil injection hole 71 rotates toward the center of the rotor until the collected oil film temperature is within the threshold range of the preset temperature. The rotation direction of the oil injection hole 71 is controlled by external oil pressure, which has higher operability, is easy for external operators to intervene, and is more convenient to use.

[0061] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A steam turbine tilting pad bearing lubricating oil device, installed between two adjacent pads in the tilting pad bearing, used to supply oil to the bearing and form an oil film driven by the rotor, characterized in that: Including oil inlet pipe and oil supply pipe; The oil outlet end of the oil inlet pipe is provided with a mounting portion, the mounting portion is provided with a rotation hole, and the axis of the rotation hole is perpendicular to the axial direction of the oil supply pipe; The oil supply pipe is rotatably mounted on the rotating hole, the inner cavity of the oil supply pipe is connected to the oil inlet pipe, and an oil injection hole is provided on the outer wall of the oil supply pipe located outside the rotating hole; A rotating block is provided on the outer side wall of the oil supply pipe located in the rotating hole, and a mounting groove is provided on the inner side wall of the rotating hole. An arc-shaped groove coaxial with the rotating hole is provided in the mounting groove, and the sliding end of the rotating block is slidably provided on the arc-shaped groove, and the mounting groove is divided into a supporting groove and a driving groove along the circumference of the rotating hole; An elastic member is provided in the supporting groove, one end of the elastic member is connected to the groove wall of the driving groove away from the rotating block, and the other end is in contact with the rotating block; The driving groove is filled with a driving body, and the driving body abuts against the rotating shift block; The volume of the driving body becomes larger to drive the rotating block to rotate in the opposite direction, so that the oil injection hole rotates toward the oil inlet side of the block, or the volume becomes smaller. Under the drive of the elastic member, the rotating block rotates in the forward direction, so that the oil injection hole rotates toward the center of the rotor.

2. The sliding bearing lubricating oil device according to claim 1, characterized in that: The driving body is a thermosensitive body made of thermosensitive material, and the volume of the thermosensitive body changes under the influence of the oil film temperature; The heat sensitive body may be one of antimony, bismuth and gallium.

3. The sliding bearing lubricating oil device according to claim 1, characterized in that: The driving body is lubricating oil, and a communicating hole is provided on the outer side wall of the oil supply pipe close to the rotating shift block so that the inner cavity of the oil supply pipe is communicated with the driving groove.

4. The sliding bearing lubricating oil device according to claim 1, characterized in that: The oil supply pipe is provided with a first oil inlet hole at the lower part of the rotating hole, and the inner side wall of the rotating hole is provided with a second oil inlet hole communicating with the inner cavity of the oil inlet pipe, and the second oil inlet hole is communicated with the first oil inlet hole; During the rotation of the oil supply pipe, the projection of the second oil inlet hole on a plane perpendicular to the axis of the oil inlet pipe is always located within the projection of the first oil inlet hole on a plane perpendicular to the axis of the oil inlet pipe.

5. The sliding bearing lubricating oil device according to claim 1, characterized in that: Annular blocks are provided on both sides of the rotating hole, and an annular boss is provided in the middle of the oil supply pipe. The annular blocks cooperate with the annular boss to seal both ends of the rotating hole.

6. The sliding bearing lubricating oil device according to claim 5, characterized in that: The mounting portion includes an upper mounting portion and a lower mounting portion. The lower mounting portion is provided at the upper end portion of the oil inlet pipe. The upper mounting portion and the lower mounting portion are detachably connected, and the upper mounting portion and the lower mounting portion form the rotating hole and the annular boss.

7. An oil temperature regulation method, implemented based on the steam turbine tilting pad sliding bearing lubricating oil device according to any one of claims 1 to 6, characterized in that: include: Collect the oil film operating temperature and compare it with the preset temperature; If the oil film temperature is within the preset temperature threshold range, the sliding end of the movable shift block is located in the middle of the arc groove, and the spray direction of the oil injection hole of the oil supply pipe is located between the oil inlet side inlet of the block and the center of the rotor, the lubricating oil device maintains this state of operation; If the oil film temperature is higher than the preset temperature, the volume of the driving body increases, and the driving body drives the rotating block to rotate in the opposite direction, driving the oil supply pipe to rotate in the opposite direction, so that the oil injection hole rotates toward the oil inlet side of the shoe until the collected oil film temperature is within the preset temperature threshold range; If the oil film temperature is lower than the preset temperature, the volume of the driving body is reduced, and the elastic member drives the rotating shift block to rotate forward, driving the oil supply pipe to rotate forward, so that the oil injection hole rotates toward the center of the rotor until the collected oil film temperature is within the preset temperature threshold range.

8. The oil temperature regulating method according to claim 7, characterized in that: The driving body is a thermosensitive body made of thermosensitive material, and the method includes: If the oil film temperature is higher than the preset temperature, the thermistor will be affected by the oil film temperature and automatically expand, making the volume of the thermistor larger. The thermistor will drive the rotating block to rotate in the opposite direction, driving the oil supply pipe to rotate in the opposite direction, so that the oil injection hole will rotate towards the oil inlet side of the block until the collected oil film temperature is within the preset temperature threshold range; If the oil film temperature is lower than the preset temperature, the thermistor will be affected by the oil film temperature and automatically shrink, making the volume of the thermistor smaller. The elastic part drives the rotating shift block to rotate forward, driving the oil supply pipe to rotate forward, causing the oil injection hole to rotate toward the center of the rotor until the collected oil film temperature is within the preset temperature threshold range and stops.

9. The oil temperature regulating method according to claim 7, characterized in that: The driving body is lubricating oil, and the method includes: If the oil film temperature is lower than the preset temperature, the power of the lubricating oil pump is increased, the oil pressure is increased, the lubricating oil in the inner cavity of the oil supply pipe continuously flows into the driving groove, the volume of the lubricating oil in the driving groove is increased, the rotating shift block is driven to rotate in the opposite direction, and the oil supply pipe is driven to rotate in the opposite direction, so that the oil injection hole rotates toward the oil inlet side of the shoe until the collected oil film temperature is within the preset temperature threshold range; If the oil film temperature is lower than the preset temperature, the power of the lubricating oil pump is reduced, the oil pressure is lowered, and the elastic member drives the rotating shift block to rotate forward, causing the lubricating oil in the drive groove to flow out into the oil supply pipe. The volume of the lubricating oil in the drive groove is reduced. At the same time, the rotating shift block drives the oil supply pipe to rotate forward, causing the oil injection hole to rotate toward the center of the rotor until the collected oil film temperature is within the preset temperature threshold range.

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