Laser punched pleated filter device for steam turbine lubricating oil system

Abstract

The present invention relates to the technical field of filters, and in particular to a laser-perforated pleated filter device for a steam turbine lubricating oil system. The filter device comprises a filter assembly, and is characterized in that a cross bar is arranged in the filter assembly, and a buffer cleaning assembly is arranged at the lower end of the cross bar in the filter assembly, and the buffer cleaning assembly comprises a mounting sleeve, and a round rod is arranged in the mounting sleeve for sliding up and down, and a spring is arranged between the round rod and the mounting sleeve. By arranging blades, during the flow of lubricating oil, the lubricating oil will act on the blades for buffering and dispersion, thereby reducing the impact of the lubricating oil on the bottom end of the filter skeleton and reducing the deformation of the filter skeleton. The motor is controlled by the detection of a distance sensor to change the angle between the blade and the horizontal plane, thereby changing the dispersion effect of the lubricating oil, better protecting the filter skeleton, and through the energy release of the torsion spring and the effect of inertia, the blades generate power to clean the filter skeleton.

Description

Technical Field

[0001] The invention relates to the technical field of filter screens, in particular to a laser-perforated pleated filter screen device for a steam turbine lubricating oil system. Background Art

[0002] The filter screen of the lubricating oil system of the steam turbine in a power plant is made of stainless steel wire mesh and copper wire mesh of different mesh sizes, and is installed in a single layer on a metal frame. Its function is to filter and block mechanical impurities and particulate matter in the oil. Due to the inherent structure of the wire mesh, the wire mesh will be weakened and partially damaged and broken under the long-term flushing of the lubricating oil, and there is a risk of the metal wire falling off, which seriously affects the safe operation of the lubricating oil system.

[0003] The laser-punched pleated filter device is made by laser punching a 0.5mm thick stainless steel plate filter and a 3mm thick stainless steel frame, which greatly improves the strength and flow area of ​​the filter, while preventing the filter wire from breaking and falling off to pollute the system, ensuring the safe operation of the lubricating oil system.

[0004] The laser-perforated pleated filter with application number 202122038906.0 includes a fixing ring, and handles are provided on the left and right sides of the top of the fixing ring. The handles are made of cylindrical stainless steel material, and the handles are connected to one end of the arc ring. The arc ring and the handles are connected by barb hanging. The bottom of the fixing ring is connected to the frame and the filter is on the outside of the frame. The filter and the frame are fixed by argon arc welding. The filter is made of laser-perforated material and is processed by pleated technology. However, during the use of the device, the addition of lubricating oil will cause impact on the filter, and when the filter is deformed by impact, the use effect of the filter will be affected.

[0005] A new type of laser-perforated filter with application number 202121272354.3 includes a filter element body, both ends of the filter element body are fixedly connected with mounting frames, a pressure-resistant inner net is arranged inside the filter element body, both ends of the pressure-resistant inner net are fixedly connected with mounting clamps, the pressure-resistant inner net includes a fixing ring, a buffer mechanism is arranged on the outer surface of the fixing ring, the buffer mechanism includes a connecting plate, and the buffer mechanism is fixedly connected to the fixing ring through the connecting plate. However, during the use of the filter, although the impact of lubricating oil on the filter is reduced, impurities blocked on the filter are difficult to clean subsequently, which can easily affect the service life of the filter.

[0006] At the same time, the turbine lubricating oil system needs to add several tons of lubricating oil at a time, and the lubricating oil will impact the bottom of the filter during the flow process. During the long-term impact process, the filter is easily deformed, and the deformation of the filter will affect its filtering effect and the flow efficiency of the lubricating oil. At the same time, the impurities in the lubricating oil will cause blockage to the filter during the flow, and the blocked filter will reduce the flow efficiency of the lubricating oil. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a laser-perforated pleated filter device for a steam turbine lubricating oil system.

[0008] The laser-perforated pleated filter device for a steam turbine lubricating oil system of the present invention comprises a filter assembly, characterized in that a cross bar is arranged inside the filter assembly, and a buffer cleaning assembly is arranged at the lower end of the cross bar inside the filter assembly;

[0009] The buffer cleaning assembly comprises a mounting sleeve, a round rod is slidably arranged in the mounting sleeve up and down, a spring is arranged between the round rod and the mounting sleeve, a turntable is rotatably arranged at the lower end of the round rod, an energy storage assembly is arranged between the turntable and the round rod, a blade is arranged on the outer side of the turntable, a connecting shaft is arranged on the side of the blade close to the turntable, the connecting shaft is rotatably connected with the turntable, a limited position slide groove is arranged on the inner side of the mounting sleeve, a limited position block is arranged on the outer side of the round rod, the limit block slides and limits in the limit position slide groove, and a distance sensor is arranged at the lower end of the turntable;

[0010] The energy storage component comprises a torsion spring. A limiting groove is arranged at the lower end of the round rod. A limiting rod is rotatably arranged in the limiting groove. The torsion spring is arranged between the limiting rod and the limiting groove.

[0011] By setting the blades, the lubricating oil will act on the blades for buffering and dispersion during the process of adding the lubricating oil, reducing the impact of the lubricating oil on the bottom end of the filter frame and reducing the deformation of the filter frame. The motor is controlled by detecting the distance sensor to change the angle between the blades and the horizontal plane, thereby changing the dispersion effect of the lubricating oil and better protecting the filter frame. When the steam turbine is shut down, the lubricating oil no longer flows, and the energy release of the torsion spring and the effect of inertia cause the blades to reverse and generate power. Under the action of the power, the lubricating oil flows in the opposite direction to clean the filter frame.

[0012] Preferably, the filter assembly comprises a mounting flange, a filter frame is arranged at the lower end of the mounting flange, a pleated filter is arranged inside the filter frame, and a handle is arranged at the upper end of the mounting flange.

[0013] Preferably, threaded holes are provided on both sides of the cross bar, the cross bar is arranged on the inner side of the mounting flange, and both sides of the cross bar are mounted on the mounting flange by bolts matching the threaded holes.

[0014] Preferably, a cavity is provided inside the turntable, an opening is provided at the lower end of the turntable, a cover plate is provided at the opening, a transmission rod is provided on the side of the turntable close to the round rod, the top end of the transmission rod is provided on the lower side of the limit rod, and a mounting hole is provided at the lower end of the transmission rod.

[0015] Preferably, a motor is arranged in the mounting hole, a first transmission gear is arranged at the output end of the motor, a second transmission gear is arranged on one side of the connecting shaft in the cavity, and the first transmission gear is meshed with the second transmission gear for transmission.

[0016] Preferably, a plurality of blades are provided.

[0017] Preferably, when the round rod descends to a limit distance in the mounting sleeve, the bottom end of the blade contacts the inner bottom end of the filter screen skeleton.

[0018] Preferably, the top of the cross bar is provided with an arc surface, and two threaded holes are respectively provided on both sides of the cross bar. After the cross bar is installed and fixed by bolts and threaded holes, the cross bar will not rotate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention is provided with blades and springs. When the lubricating oil in the lubricating oil system of the steam turbine flows, the lubricating oil will act on the blades, and the blades are used for buffering with the assistance of the blades to prevent the lubricating oil from directly impacting the bottom of the filter frame, thereby reducing the deformation of the filter frame. When the blades are impacted by the lubricating oil with the assistance of the springs, the greater the impact force, the greater the descending distance of the blades. Therefore, the lubricating oil dispersed with the assistance of the blades will act on the side walls of the filter frame, thereby making full use of the filter frame.

[0021] 2. The present invention is provided with a motor, a distance sensor and a spring. When the lubricating oil in the lubricating oil system of the steam turbine flows, the lubricating oil impacts the blades. Under the action of the spring, the round rod moves downward, and the distance between the turntable and the bottom of the filter frame is detected by the auxiliary of the distance sensor, thereby indirectly obtaining the flow rate of the lubricating oil. Correspondingly, the angle between the blade and the horizontal plane is controlled by the motor, so that when the detection value of the distance sensor decreases, that is, when the flow rate of the lubricating oil increases, the angle between the blade and the horizontal plane will decrease under the control of the motor, so that the buffering and dispersing effect of the blade on the lubricating oil is stronger, and the protection effect on the filter frame is better.

[0022] 3. The present invention is provided with a torsion spring, blades and a transmission rod. When the lubricating oil impacts the blades, the blades will rotate. With the assistance of the transmission rod, the torsion spring will store energy. When the steam turbine is shut down, the lubricating oil no longer flows and the blades are no longer impacted by the lubricating oil. At this time, the torsion spring releases energy to rotate the blades, and due to the influence of inertia, the rotation of the blades will reciprocate, thereby forming a pulse power to enable the lubricating oil to clean the filter frame.

[0023] 4. The present invention is provided with blades, springs and round rods. When the round rod drops to the limit, the lower end of the blade contacts the bottom end of the filter frame. As the blade rotates, the blade scrapes the bottom of the filter frame to clean up impurities at the bottom of the filter frame, thereby improving the use effect of the filter frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the pleated filter screen of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the buffer cleaning component of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the blades, the rotating disk and other components of the present invention;

[0029] Figure 6 The present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0030] Figure 7 The present invention Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0031] Figure 8 The present invention Figure 5 Schematic diagram of the enlarged structure at point C in the middle.

[0032] 1. Filter assembly; 2. Cross bar; 3. Buffer cleaning assembly; 4. Energy storage assembly; 101. Mounting flange; 102. Filter frame; 103. Handle; 104. Pleated filter; 301. Mounting sleeve; 302. Round rod; 303. Spring; 304. Turntable; 305. Blade; 306. Connecting shaft; 307. Limiting groove; 308. Limiting block; 309. Cavity; 310. Opening; 311. Cover plate; 312. Transmission rod; 313. Mounting hole; 314. Motor; 315. First transmission gear; 316. Second transmission gear; 401. Torsion spring; 402. Limiting groove; 403. Limiting rod. DETAILED DESCRIPTION

[0033] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0034] like Figures 1 to 4 As shown, the laser-perforated pleated filter device of the steam turbine lubricating oil system of the present invention comprises a filter assembly 1, a cross bar 2 is arranged in the filter assembly 1, and a buffer cleaning assembly 3 is arranged in the filter assembly 1 at the lower end of the cross bar 2. The lubricating oil flowing in the steam turbine is filtered with the assistance of the filter assembly 1 to prevent impurities in the lubricating oil from entering the lubricating oil system of the steam turbine, thereby making the steam turbine more stable during operation, and the present invention can be conveniently transferred with the assistance of the cross bar 2, making it more convenient during use.

[0035] The filter assembly 1 includes a mounting flange 101, a filter frame 102 is arranged at the lower end of the mounting flange 101, a pleated filter 104 is arranged on the inner side of the filter frame 102, and a handle 103 is arranged at the upper end of the mounting flange 101. The diameter of the mounting flange 101 is larger than the oil inlet of the turbine lubricating oil system. The filter frame 102 is used to filter impurities in the lubricating oil. With the assistance of the handle 103, the present invention can be pulled out from the oil inlet of the turbine lubricating oil system after use.

[0036] Threaded holes are provided on both sides of the cross bar 2, and the cross bar 2 is provided on the inner side of the mounting flange 101. The two sides of the cross bar 2 are mounted on the mounting flange 101 by bolts and threaded holes. After the cross bar 2 is installed, when the present invention is pulled out after use only with the assistance of the handle 103, the handle 103 is easily deformed, making it difficult to pull out the present invention. After the cross bar 2 is installed, the handle 103 and the cross bar 2 can assist each other, making the pulling out of the present invention more convenient, thereby improving the convenience of using the equipment.

[0037] An arcuate surface is provided on the top of the cross bar 2, and two threaded holes are respectively provided on both sides of the cross bar 2. After the cross bar 2 is installed and fixed by bolts and threaded holes, the cross bar 2 will not rotate. When the lubricating oil flows, the arcuate surface on the top of the cross bar 2 will not produce excessive resistance to the flow of the lubricating oil due to the existence of the cross bar 2, so that the flow of the lubricating oil is smoother, and the two sides of the cross bar 2 are respectively fixed with two bolts to prevent the cross bar 2 from rotating during use, thereby ensuring that no slipping occurs when the pull-out of the present invention is assisted by the cross bar 2, thereby improving the stability of the equipment.

[0038] During use of the present invention, the handle 103 is held to lift the device, the cover at the oil inlet of the turbine lubricating oil system is opened, and then the device is prevented from deflecting with the assistance of the cross bar 2, and then the device is inserted into the oil inlet of the turbine lubricating oil system, the filter frame 102 enters the oil inlet of the turbine lubricating oil system, and the mounting flange 101 is attached to the oil inlet of the turbine lubricating oil system.

[0039] Afterwards, when the steam turbine is running, the lubricating oil will continuously pass through the filter frame 102. During the flow of the lubricating oil, the top of the cross bar 2 is set as an arc surface, so the cross bar 2 will not affect the flow of the lubricating oil.

[0040] When the steam turbine is shut down, the lubricating oil no longer flows, and the device is pulled out from the oil inlet of the steam turbine lubricating oil system by holding the handle 103. During the pulling-out process, the other hand can hold the cross bar 2 to assist in pulling out the device to prevent the handle 103 from being deformed during the pulling-out process.

[0041] During the specific use of the present invention, the steam turbine lubricating oil system needs to add several tons of lubricating oil at a time, and the lubricating oil will impact the bottom of the filter frame 102 during the flow process. During the long-term impact process, the filter frame 102 is easily deformed, and the deformation of the filter frame 102 will affect its filtering effect and the flow efficiency of the lubricating oil. At the same time, impurities in the lubricating oil will cause blockage to the filter frame 102 when added, and the blocked filter frame 102 will reduce the flow efficiency of the lubricating oil. For this reason, the following improvements are made:

[0042] like Figures 1 to 8 As shown, the buffer cleaning component 3 includes a mounting sleeve 301, a round rod 302 is slidably arranged in the mounting sleeve 301, a spring 303 is arranged between the round rod 302 and the mounting sleeve 301, a turntable 304 is rotatably arranged at the lower end of the round rod 302, an energy storage component 4 is arranged between the turntable 304 and the round rod 302, and a blade 305 is arranged on the outer side of the turntable 304. The mounting sleeve 301 is located in the filter frame 102. When the lubricating oil flows through the filter frame 102, after the lubricating oil enters the filter frame 102, the lubricating oil will first act on the blade 305, and then the blade 305 will be affected. 05 generates a downward impact force, and the inclination of the blades 305 will relieve the impact force of the lubricating oil, so that the lubricating oil is dispersed in the filter frame 102, reducing the impact force on the bottom of the filter frame 102 when the lubricating oil flows, thereby avoiding the deformation of the filter frame 102 under the impact of the lubricating oil, and when the lubricating oil flows, due to the assistance of the spring 303, as the flow rate of the lubricating oil increases, the descending distance of the round rod 302 increases, at this time The effective use area of ​​the filter frame 102 will also increase accordingly, and at the same time, the effect of the lubricating oil on the blades 305 will also cause the blades 305 to rotate.

[0043] A connecting shaft 306 is provided on one side of the blade 305 close to the rotating disk 304, and the connecting shaft 306 is rotatably connected to the rotating disk 304. A limiting groove 307 is provided on the inner side of the mounting sleeve 301, and a limiting block 308 is provided on the outer side of the round rod 302. The limiting block 308 slides and limits in the limiting groove 307. A distance sensor is provided at the lower end of the rotating disk 304. When the connecting shaft 306 is rotated, the rotation of the connecting shaft 306 will drive the deflection of the blade 305, so that the deflection angle of the blade 305 changes. The change changes the buffering effect of the blade 305 on the flow of the lubricating oil. When the round rod 302 is lifted or lowered, the cooperation of the limit block 308 and the limit slide groove 307 makes the round rod 302 more stable when lifted or lowered. The distance between the turntable 304 and the bottom of the filter frame 102 can be detected with the assistance of the distance sensor. The smaller the detection value of the distance sensor, the smaller the distance between the bottom of the turntable 304 and the bottom of the filter frame 102, that is, the greater the flow rate of the lubricating oil.

[0044] The energy storage component 4 includes a torsion spring 401, a limiting groove 402 is provided at the lower end of the round rod 302, a limiting rod 403 is rotatably provided in the limiting groove 402, and the torsion spring 401 is provided between the limiting rod 403 and the limiting groove 402. When the blade 305 is impacted by the lubricating oil and rotates, the turntable 304 is rotated, and the rotation of the turntable 304 drives the limiting rod 403 to rotate. When the limiting rod 403 rotates, energy is stored through the torsion spring 401. When the steam turbine is shut down, the lubricating oil no longer flows, and the blade 305 is no longer impacted by the lubricating oil and rotates. Therefore, the energy stored in the torsion spring 401 can be released, so that the limiting rod 403 flips the turntable 304, thereby reversing the blade 305.

[0045] A cavity 309 is provided inside the turntable 304, an opening 310 is provided at the lower end of the turntable 304, a cover plate 311 is provided at the opening 310, a transmission rod 312 is provided on the side of the turntable 304 close to the round rod 302, the top end of the transmission rod 312 is provided on the lower side of the limit rod 403, and a mounting hole 313 is provided at the lower end of the transmission rod 312. After opening the cover plate 311, the components in the cavity 309 can be installed and maintained, making the use of the equipment more convenient. The limit rod 403 and the turntable 304 are connected and transmitted through the transmission rod 312.

[0046] A motor 314 is arranged in the mounting hole 313, and a first transmission gear 315 is arranged at the output end of the motor 314. A second transmission gear 316 is arranged on one side of the connecting shaft 306 in the cavity 309. The first transmission gear 315 and the second transmission gear 316 are meshed for transmission. After the motor 314 is started, the output end of the motor 314 will drive the rotation of the first transmission gear 315. The rotation of the first transmission gear 315 drives the rotation of the second transmission gear 316 through the meshing transmission, thereby rotating the connecting shaft 306, and the deflection angle of the blade 305 is controlled with the assistance of the motor 314.

[0047] A plurality of blades 305 are provided, and the plurality of blades 305 assist each other to achieve a better buffering and dispersion effect of the lubricating oil.

[0048] When the round rod 302 descends to the limit distance in the installation sleeve 301, the bottom end of the blade 305 contacts the inner bottom end of the filter skeleton 102. When the round rod 302 descends to the limit, the blade 305 rotates due to the impact of the lubricating oil. The bottom end of the blade 305 can scrape off the impurities blocking the inner bottom end of the filter skeleton 102, thereby ensuring the filtering effect of the filter skeleton 102.

[0049] During use of the present invention, when the lubricating oil in the lubricating oil barrel is poured into the filter frame 102, the lubricating oil will exert a downward force on the blades 305, and the effect of the lubricating oil on the blades 305 will be affected by the inclination of the blades 305, causing the blades 305 to rotate. When the lubricating oil acts on the blades 305, part of the lubricating oil will spread around, and the other part of the lubricating oil will fall through the gaps between the blades 305, thereby reducing the direct impact of the lubricating oil flow on the bottom end of the filter frame 102 and avoiding deformation of the filter frame 102.

[0050] When the blade 305 is impacted by the lubricating oil, it will rotate clockwise, and the rotation of the blade 305 can assist in the dispersion of the lubricating oil, thereby avoiding the direct impact of the filter frame 102 when the lubricating oil flows, and when the lubricating oil flows and exerts a downward force on the blade 305, the round rod 302 will be lowered, and then the position of the blade 305 will be lowered. At this time, the effective filtering area of ​​the filter frame 102 will increase, so that the flowing lubricating oil can enter the turbine lubricating oil system after better filtration.

[0051] When the round rod 302 descends, the detection value of the distance sensor will also decrease, which corresponds to an increase in the flow of lubricating oil entering the filter skeleton 102. At this time, as the detection value of the distance sensor decreases, the motor 314 starts, and the output end of the motor 314 drives the first transmission gear 315 to rotate. The rotation of the first transmission gear 315 drives the second transmission gear 316 to rotate through meshing transmission, thereby rotating the connecting shaft 306. The rotation of the connecting shaft 306 will drive the deflection of the blade 305, thereby reducing the angle between the blade 305 and the horizontal plane, that is, the smaller the detection value of the distance sensor, the smaller the angle between the blade 305 and the horizontal plane.

[0052] When the angle between the blade 305 and the horizontal plane decreases, when the lubricating oil acts on the blade 305, the degree to which the lubricating oil is dispersed outward by the blade 305 is greater, that is, the impact of the lubricating oil on the bottom end of the filter skeleton 102 is smaller, so that when the flow rate of the lubricating oil increases, the filter skeleton 102 can be better protected. At the same time, when the degree to which the lubricating oil is dispersed outward by the blade 305 increases, the lubricating oil will act more on the inner side end of the filter skeleton 102, thereby making full use of the filter skeleton 102.

[0053] When the detection value of the distance sensor is reduced to the minimum value, the round rod 302 drops to the limit distance, and the bottom end of the blade 305 will contact the bottom end of the filter frame 102. As the blade 305 rotates clockwise, the bottom end of the blade 305 will scrape off the impurities filtered by the bottom end of the filter frame 102 to ensure the smoothness of the filtration at the bottom end of the filter frame 102. When the bottom end of the blade 305 contacts the bottom end of the filter frame 102, as the blade 305 rotates, the filter frame 102 will vibrate. With the assistance of vibration, the lubricating oil can better pass through the filter frame 102 and enter the lubricating oil system of the turbine.

[0054] When the blade 305 is impacted by the lubricating oil and rotates, the rotation of the blade 305 will drive the rotation of the turntable 304, and the rotation of the turntable 304 will drive the rotation of the limit rod 403 through the transmission rod 312, and the rotation of the limit rod 403 will cause the torsion spring 401 to temporarily store energy. When the steam turbine is shut down, the lubricating oil no longer flows, and the blade 305 is no longer impacted by the lubricating oil and rotates. At this time, the torsion spring 401 begins to release energy, so that the limit rod 403 rotates in the opposite direction. The reverse rotation of the limit rod 403 drives the reverse rotation of the turntable 304 through the transmission rod 312, so that the turntable 304 rotates counterclockwise, and the counterclockwise rotation of the turntable 304 causes the blade 305 to rotate counterclockwise, and the counterclockwise rotation of the blade 305 causes the lubricating oil to flow upward, and the impurities blocked by the filter frame 102 can be extracted under the action of the upward flow of the lubricating oil, thereby improving the use effect of the filter frame 102.

[0055] When the steam turbine is shut down, the lubricating oil no longer flows, and the blade 305 is no longer subjected to a downward force. With the assistance of the spring 303, the round rod 302 moves upward. At this time, the detection value of the distance sensor increases, so the motor 314 reverses, thereby increasing the angle between the blade 305 and the horizontal plane. When the angle between the blade 305 and the horizontal plane increases, the power generated by the rotation of the blade 305 also increases, so that the backflow of the lubricating oil has a better cleaning effect on the filter frame 102.

[0056] When the torsion spring 401 releases energy, the turntable 304 will rotate back and forth due to inertia, so the power generated by the blades 305 will change back and forth, so that the lubricating oil flows on the filter frame 102 in a pulse state, which will make the cleaning effect of the filter frame 102 better.

[0057] When the torsion spring 401 is storing energy in the lubricating oil in the forward direction, the rotation speed of the blade 305 is slow. When the torsion spring 401 is releasing energy, the rotation speed of the blade 305 is fast. When the round rod 302 rises to the limit distance, some of the scraped impurities are located between the end of the blade 305 and the mounting flange 101. The rising of the blade 305 and the mounting flange 101 will squeeze the impurities and discharge the residual lubricating oil in the impurities, thereby reducing the waste of lubricating oil.

[0058] The main functions achieved by the present invention are: by setting the blades 305, during the process of adding the lubricating oil, the lubricating oil will act on the blades 305 for buffering and dispersion, thereby reducing the impact of the lubricating oil on the bottom end of the filter frame 102 and reducing the deformation of the filter frame 102. The motor 314 is controlled by the detection of the distance sensor to change the angle between the blades 305 and the horizontal plane, thereby changing the dispersion effect of the lubricating oil and better protecting the filter frame 102. When the turbine is shut down, the lubricating oil no longer flows, and the blades 305 generate power through the energy release of the torsion spring 401 and the effect of inertia, and the lubricating oil flows back under the action of the power to clean the filter frame 102.

[0059] The installation, connection or setting methods of the laser-perforated pleated filter device for the steam turbine lubricating oil system of the present invention are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects.

[0060] All technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A laser-perforated pleated filter device for a steam turbine lubricating oil system, comprising a filter assembly (1), characterized in that: A cross bar (2) is arranged inside the filter assembly (1), and a buffer cleaning assembly (3) is arranged at the lower end of the cross bar (2) inside the filter assembly (1); The filter assembly (1) comprises a mounting flange (101), a filter frame (102) is arranged at the lower end of the mounting flange (101), a pleated filter (104) is arranged inside the filter frame (102), and a handle (103) is arranged at the upper end of the mounting flange (101); The buffer cleaning assembly (3) comprises a mounting sleeve (301), a round rod (302) is slidably arranged in the mounting sleeve (301) up and down, a spring (303) is arranged between the round rod (302) and the mounting sleeve (301), a rotating disk (304) is rotatably arranged at the lower end of the round rod (302), an energy storage assembly (4) is arranged between the rotating disk (304) and the round rod (302), a blade (305) is arranged on the outside of the rotating disk (304), a connecting shaft (306) is arranged on the side of the blade (305) close to the rotating disk (304), the connecting shaft (306) is rotatably connected to the rotating disk (304), a limiting sliding groove (307) is arranged on the inside of the mounting sleeve (301), a limiting block (308) is arranged on the outside of the round rod (302), and the limiting block (308) is slidably limited in the limiting sliding groove (307) A distance sensor is provided at the lower end of the rotating disk (304), a cavity (309) is provided inside the rotating disk (304), an opening (310) is provided at the lower end of the rotating disk (304), a cover plate (311) is provided at the opening (310), a transmission rod (312) is provided on the side of the rotating disk (304) close to the round rod (302), the top end of the transmission rod (312) is provided on the lower side of the limit rod (403), a mounting hole (313) is provided at the lower end of the transmission rod (312), a motor (314) is provided in the mounting hole (313), a first transmission gear (315) is provided at the output end of the motor (314), a second transmission gear (316) is provided on one side of the connecting shaft (306) in the cavity (309), and the first transmission gear (315) and the second transmission gear (316) are meshed for transmission; The energy storage component (4) comprises a torsion spring (401), a limiting groove (402) is provided at the lower end of the round rod (302), a limiting rod (403) is rotatably provided in the limiting groove (402), and the torsion spring (401) is provided between the limiting rod (403) and the limiting groove (402); When the lubricating oil flows through the filter frame (102), after the lubricating oil enters the filter frame (102), the lubricating oil first acts on the blades (305), generating a downward impact force on the blades (305), and the inclination of the blades (305) relieves the impact force of the lubricating oil, so that the lubricating oil is dispersed in the filter frame (102), reducing the impact force on the bottom of the filter frame (102) when the lubricating oil flows, thereby preventing the filter frame (102) from being deformed under the impact of the lubricating oil, and when the lubricating oil flows, due to the assistance of the spring (303), as the flow rate of the lubricating oil increases, the descending distance of the round rod (302) increases, and at this time, the effective use area of ​​the filter frame (102) is also increased accordingly, and at the same time, the action of the lubricating oil on the blades (305) also causes the blades (305) to rotate; The rotation of the connecting shaft (306) drives the blade (305) to deflect, causing the deflection angle of the blade (305) to change, thereby changing the buffering effect of the blade (305) on the flow of the lubricating oil. When the round rod (302) is lifted or lowered, the cooperation of the limit block (308) and the limit slide groove (307) makes the round rod (302) more stable when being lifted or lowered. The distance between the rotating disk (304) and the bottom end of the filter frame (102) is detected by the auxiliary of the distance sensor. The smaller the detection value of the distance sensor, the smaller the distance between the bottom end of the rotating disk (304) and the bottom end of the filter frame (102), that is, the greater the flow rate of the lubricating oil when it flows. When the steam turbine is shut down, the lubricating oil no longer flows, and the blade (305) is no longer subjected to a downward force. With the assistance of the spring (303), the round rod (302) moves upward. At this time, the detection value of the distance sensor increases, so the motor (314) reverses, thereby increasing the angle between the blade (305) and the horizontal plane. When the angle between the blade (305) and the horizontal plane increases, the power generated by the rotation of the blade (305) also increases, so that the lubricating oil backflow has a better cleaning effect on the filter frame (102).

2. The laser perforated pleated filter device for the steam turbine lubricating oil system according to claim 1, characterized in that: Threaded holes are provided on both sides of the cross bar (2), the cross bar (2) is arranged inside the mounting flange (101), and both sides of the cross bar (2) are mounted on the mounting flange (101) by means of bolts that cooperate with the threaded holes.

3. The laser perforated pleated filter device for a steam turbine lubricating oil system according to claim 1, characterized in that: A plurality of blades (305) are provided.

4. The laser perforated pleated filter device for a steam turbine lubricating oil system according to claim 1, characterized in that: When the round rod (302) descends to a limit distance in the installation sleeve (301), the bottom end of the blade (305) contacts the inner bottom end of the filter screen skeleton (102).

5. The laser perforated pleated filter device for a steam turbine lubricating oil system according to claim 2, characterized in that: The top of the cross bar (2) is provided with an arc-shaped surface, and two threaded holes are respectively provided on both sides of the cross bar (2). After the cross bar (2) is installed and fixed by means of bolts and threaded holes, the cross bar (2) will not rotate.

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