Gas filtering structure in gas inlet system of gas turbine and gas filtering method of gas filtering structure

Abstract

The invention relates to a gas filtering structure in a gas inlet system of a gas turbine and a gas filtering method of the gas filtering structure. The gas filtering structure comprises a mounting frame and a filtering tank mounted on the mounting frame, and the filtering tank is provided with a gas inlet pipe and a gas outlet pipe; a filtering disc is detachably mounted in the air inlet pipe, and the filtering disc abuts against a scraping assembly rotationally arranged in the air inlet pipe; an air pumping mechanism communicated with the air inlet pipe is arranged on the filter pipe; when the air pumping mechanism is started to work, the scraping assembly and the negative pressure mechanism are controlled to work synchronously, the scraping assembly cleans accumulated dust attached to the filter disc, and the cleaned dust enters the scraping assembly in the direction opposite to the working direction of the scraping assembly, so that the dust can be scraped off, and the dust can be scraped off. And the dust is collected in the negative pressure mechanism, so that the filter disc is prevented from being blocked by the stacked dust, and fine dust on the filter disc is effectively cleaned and collected.

Description

Technical Field

[0001] The invention relates to an air filter structure and an air filtering method in an air intake system of a combustion engine. Background Art

[0002] As a common power equipment, the intake system of the gas engine has a vital impact on the overall performance and efficiency. The intake system of the gas engine is mainly responsible for introducing air into the combustion chamber, mixing with fuel and burning to generate power. The intake system is usually composed of air filters, intake pipes, throttle valves and other components. When the gas engine is working, the intake valve opens, and the air enters the intake pipe through the filter, and then enters the combustion chamber after being adjusted by the throttle valve. The filter in the gas engine intake system is one of the important components to protect the normal operation of the gas engine. Its main function is to prevent impurities such as dust, sand, and foreign matter from entering the gas engine, to ensure the internal cleanliness of the gas engine, and to maintain normal combustion efficiency.

[0003] The air filter structure in the existing gas engine intake system is generally used to finely filter the compressed air entering the gas engine in order to ensure that the air entering the gas engine is dry and clean. However, as the compressed air continues to enter the intake end of the gas engine system, a large amount of fine dust will accumulate on the front end of the filter, causing the filter screen holes to be blocked, resulting in the compressed air being unable to be normally delivered into the gas engine. Summary of the invention

[0004] The object of the present invention is to provide an air filter structure in an intake system of a combustion engine to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: An air filter structure in an air intake system of a combustion engine comprises a mounting frame and a filter tank mounted on the mounting frame, wherein an air inlet pipe and an air outlet pipe are respectively arranged on the filter tank; A filter disc is detachably mounted in the air intake pipe, and the filter disc abuts against a scraping assembly rotatably disposed in the air intake pipe; The filter tank is provided with an air pump mechanism connected to the air inlet pipe, and the air pump mechanism can control the scraping component to perform a scraping action; A negative pressure mechanism is installed on the mounting frame and connected to the scraping assembly.

[0006] The air filter structure in the intake system of the combustion engine as described above: the scraper assembly includes a scraper member rotatably arranged in the intake pipe, the scraper member is fixed to a transmission shaft rotatably installed in the intake pipe in a hollow structure, and the transmission shaft is connected to the pumping mechanism through a reduction transmission member; It also includes a delivery pipe arranged in the transmission shaft, one end of which is fixed to the filter disc and communicated with the scraper, and the other end of which is communicated with the negative pressure mechanism through a connecting pipe.

[0007] The air filter structure in the gas engine intake system as described above: the scraper includes a sleeve arranged axially along the transmission shaft, a plurality of scrapers are arranged radially along the sleeve, a plurality of through holes are formed on the inclined surface of the scraper, and the inner cavity of the scraper is connected to the delivery pipe.

[0008] The air filter structure in the intake system of the fuel engine as described above: the air pumping mechanism includes an impeller assembly installed on the filter tank, the impeller assembly is driven to rotate by a motor installed on the filter tank, and the impeller assembly is respectively provided with an air inlet end and an air outlet end, and the air outlet end is connected to the inner side of the intake pipe through a conduit.

[0009] The air filter structure in the intake system of the combustion engine as described above: the reduction transmission component includes a vortex rod rotatably connected to the outer wall of the filter tank, the vortex rod is rotatably connected to a drive shaft rotatably arranged on the filter tank through a belt, and the vortex rod is meshed with a turbine arranged on the drive shaft.

[0010] The air filter structure in the gas engine intake system as described above: the negative pressure mechanism comprises a negative pressure tank mounted on the filter tank, an ash inlet and an ash outlet are provided at the bottom of the negative pressure tank, and an end of the connecting pipe away from the conveying pipe is connected to the ash inlet; It also includes a pushing component arranged in the negative pressure tank.

[0011] The air filter structure in the intake system of the combustion engine as described above: the pushing assembly includes a piston sealingly and slidingly arranged in the negative pressure tank, a threaded sleeve is arranged along the axial direction of the piston, the threaded sleeve is threadedly connected to a screw rod rotatably installed outside the filter tank, one end of the screw rod passes through the negative pressure tank and is rotatably connected to the transmission shaft through a bevel gear set.

[0012] The air filter structure in the gas engine intake system as described above: at least one set of limiting slide grooves is formed on the inner wall of the negative pressure tank, and a limiting sliding block slidably matched with the limiting slide grooves is provided on the piston.

[0013] A method for filtering air in an air intake system of a combustion engine, using the air filter structure in the air intake system of the combustion engine as described in any one of the above, comprising the following steps: Step 1: When the pump air mechanism is started, the pump air mechanism delivers compressed air to the air inlet pipe of the filter tank. Under the filtering action of the filter disc, fine dust such as catkins in the compressed air is separated and enters the filter tank for gas-liquid separation; Step 2: When the pump mechanism is working, it drives the scraping component to scrape and clean the dust on the filter disc to avoid clogging of the filter disc; Step 3: When the scraping component performs the scraping work, the negative pressure mechanism generates negative pressure, so that the powder ash scraped off by the scraping component is taken away and transported to the negative pressure mechanism.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By starting the air pump mechanism, the compressed air is transported to the front of the filter tank, and the fine dust in the compressed air is removed in the intake pipe. Under the action of the filter disc, the compressed air entering the filter tank can be effectively filtered out of the fine dust in the compressed air. While the air pump mechanism is working, the scraper component and the negative pressure mechanism are controlled to work synchronously. The scraper component cleans the accumulated dust attached to the filter disc, and under the action of the negative pressure mechanism, the cleaned dust enters the scraper component in the opposite direction of the scraper component, and is collected in the negative pressure mechanism, which prevents the filter disc from being blocked by the stacked dust and effectively cleans and collects the fine dust on the filter disc, thereby further enhancing the filtering effect before the engine intake. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the air filter in the intake system of the gas engine.

[0016] Figure 2 It is a schematic diagram of the structure of the filter tank in the air filter structure in the gas engine intake system.

[0017] Figure 3 It is a structural schematic diagram of the intake pipe and filter disc in the air filter structure in the gas engine intake system.

[0018] Figure 4 It is a structural schematic diagram of the filter disc and scraper assembly in the air filter structure in the gas engine intake system.

[0019] Figure 5 It is a schematic diagram of the structure of the scraper and the delivery pipe in the air filter structure in the gas engine intake system.

[0020] Figure 6 It is a structural schematic diagram of the pumping mechanism and the reduction transmission parts in the air filter structure in the gas engine intake system.

[0021] Figure 7 It is a structural schematic diagram of the drive shaft and negative pressure mechanism in the air filter structure in the gas engine intake system.

[0022] Figure 8 It is a structural schematic diagram of the screw and threaded sleeve in the air filter structure in the gas engine intake system.

[0023] In the figure: 1, mounting frame; 2, filter tank; 201, air inlet pipe; 202, air outlet pipe; 3, motor; 4, impeller assembly; 5, drive shaft; 6, filter plate; 7, transmission shaft; 8, scraper; 801, scraper; 802, through hole; 9, delivery pipe; 10, worm gear; 11, belt; 12, turbine; 13, bevel gear set; 14, screw rod; 15, connecting pipe; 16, negative pressure tank; 1601, limit slide groove; 17, threaded sleeve; 18, piston; 1801, limit slide block; 19, catheter. DETAILED DESCRIPTION

[0024] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0025] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0026] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0027] The present invention aims to provide an air filtering method in a gas engine intake system, specifically an air filter structure in a gas engine intake system, which can effectively filter fine dust in the air and can be cleaned in time after filtering to prevent air filtration from being blocked. The specific implementation method is as follows: See also Figure 1 to Figure 8 In an embodiment of the present invention, an air filter structure in an intake system of a combustion engine includes a mounting frame 1 and a filter tank 2 mounted on the mounting frame 1, wherein the filter tank 2 is provided with an intake pipe 201 and an outlet pipe 202; A filter disc 6 is detachably installed in the air intake pipe 201, and the filter disc 6 abuts against a scraping assembly rotatably arranged in the air intake pipe 201; The filter tank 2 is provided with a pumping mechanism connected to the air inlet pipe 201, and the pumping mechanism can control the scraping component to perform a scraping action; The negative pressure mechanism is installed on the mounting frame 1 and connected to the scraping assembly.

[0028] In detail, when the air pump mechanism is started, the compressed air is transported to the filter tank 2 before the fine dust in the compressed air is removed in the air intake pipe 201. Under the action of the filter disc 6, the compressed air entering the filter tank 2 can be effectively filtered out of the fine dust in the compressed air. While the air pump mechanism is working, the scraping component and the negative pressure mechanism are controlled to work synchronously. The scraping component cleans the accumulated dust attached to the filter disc 6. Under the action of the negative pressure mechanism, the cleaned dust enters the scraping component in the opposite direction of the scraping component, and is collected in the negative pressure mechanism. This prevents the filter disc 6 from being blocked by stacked dust, while effectively cleaning and collecting the fine dust on the filter disc 6, further enhancing the filtering effect before the engine intake.

[0029] It should be noted that: air filter technology is used in the filter tank 2. After the compressed air enters the filter tank 2, the drum is driven to rotate along the direction of the guide plate. Under the centrifugal force, the compressed air in the drum is separated from the gas and liquid. The specific centrifugal separation is achieved by using the existing technology, and the present invention will not elaborate on it.

[0030] Among them, considering that the centrifugal force in the filter tank 2 cannot separate the fine dust in the compressed air and clean it in time, the fine dust in the compressed air is filtered and cleaned in the air intake pipe 201 at the front end of the filter tank 2 in the present invention to prevent these particles from entering the pipeline system, thereby avoiding corrosion, valve blockage and machine damage, and ensuring the safe and efficient operation of the gas turbine.

[0031] As a further solution of the present invention, the scraping assembly includes a scraping member 8 rotatably disposed in the air intake pipe 201, the scraping member 8 is fixed to a transmission shaft 7 rotatably mounted in the air intake pipe 201 and having a hollow structure, and the transmission shaft 7 is connected to the air pump mechanism through a reduction transmission member; It also includes a delivery pipe 9 arranged in the transmission shaft 7 , one end of the delivery pipe 9 is fixed to the filter disc 6 and communicated with the scraper 8 , and the other end is communicated with the negative pressure mechanism through a connecting pipe 15 .

[0032] The scraper 8 includes a sleeve axially arranged along the transmission shaft 7 , and a plurality of scrapers 801 are radially arranged along the sleeve. A plurality of through holes 802 are formed on the inclined surface of the scraper 801 , and the inner cavity of the scraper 801 is connected to the delivery pipe 9 .

[0033] Specifically, the pump air mechanism is started to drive the transmission shaft 7 to rotate. When the transmission shaft 7 rotates, the scraper 8 is driven to rotate synchronously. At this time, the transmission shaft 7 and the scraper 8 rotate relative to the conveying pipe 9. When the scraper 8 rotates, the dust attached and adhered to the surface of the filter disc 6 is cleaned off. At this time, under the action of the negative pressure mechanism, a negative pressure is generated in the conveying pipe 9, so that the scraped dust enters the scraper 801 due to the negative pressure in the conveying pipe 9, and is collected in the conveying pipe 9 through the sleeve and the transmission shaft 7, so as to achieve effective removal and collection of dust on the filter disc 6.

[0034] Among them, a plurality of first ash inlet holes are radially arranged on the sleeve and the transmission shaft 7, and a plurality of second ash inlet holes are also radially arranged on the conveying pipe 9. Under the action of the first ash inlet holes and the second ash inlet holes, the interior of the scraper 801 and the interior of the conveying pipe 9 are connected, so that when the scraper 801 rotates relative to the filter plate 6, the scraped dust moves in the opposite direction of the rotation of the scraper 801, enters the inner cavity of the scraper 801 through the through hole 802, and the rotation of the scraper 801 has no effect on the dust in the scraper 801 entering the conveying pipe 9.

[0035] As a further solution of the present invention, please refer to Figure 1 The air pumping mechanism includes an impeller assembly 4 installed on the filter tank 2, and the impeller assembly 4 is driven to rotate by a motor 3 installed on the filter tank 2. The impeller assembly 4 is respectively provided with an air inlet end and an air outlet end, and the air outlet end is connected to the inner side of the air inlet pipe 201 through a conduit 19.

[0036] The reduction transmission component includes a worm gear 10 rotatably connected to the outer wall of the filter tank 2 , the worm gear 10 is rotatably connected to a drive shaft 5 rotatably disposed on the filter tank 2 via a belt 11 , and the worm gear 10 is meshed with a turbine 12 disposed on the transmission shaft 7 .

[0037] The impeller assembly 4 includes blades, an impeller shaft, and a blade cover. When the starting motor 3 is working, the output shaft of the motor 3 is fixedly connected to the impeller shaft, so that when the output shaft rotates, the impeller shaft is driven to rotate accordingly, thereby delivering the compressed air to the intake pipe 201 through the conduit 19, wherein the impeller shaft is installed with and under the transmission action of the belt 11, when the impeller shaft rotates, the worm 10 is driven to rotate synchronously, wherein the transmission of the worm 10 and the turbine 12 has a deceleration effect to achieve the requirement of decelerating the rotation of the transmission shaft 7.

[0038] As a further solution of the present invention, please refer to Figure 7 The negative pressure mechanism comprises a negative pressure tank 16 mounted on the filter tank 2, an ash inlet and an ash outlet are provided at the bottom of the negative pressure tank 16, and an end of the connecting pipe 15 away from the conveying pipe 9 is connected to the ash inlet; It also includes a pushing component arranged in the negative pressure tank 16.

[0039] The pushing assembly includes a piston 18 that is sealingly and slidably arranged in the negative pressure tank 16, and a threaded sleeve 17 is arranged along the axial direction of the piston 18. The threaded sleeve 17 is threadedly connected to a screw rod 14 that is rotatably installed outside the filter tank 2. One end of the screw rod 14 passes through the negative pressure tank 16 and is rotatably connected to the transmission shaft 7 through a bevel gear set 13.

[0040] Preferably, at least one set of limiting sliding grooves 1601 is formed on the inner wall of the negative pressure tank 16 , and a limiting sliding block 1801 slidably matched with the limiting sliding grooves 1601 is provided on the piston 18 .

[0041] It should be noted that when the piston 18 moves upward, it drives the limit slider 1801 to move upward synchronously. Under the limiting effect of the limit slide groove 1601, the limit slider 1801 always slides in the limit slide groove 1601, thereby realizing the sliding connection between the piston 18 and the inner wall of the negative pressure tank 16, and can limit the threaded sleeve 17 to rotate synchronously with the rotation of the screw rod 14.

[0042] Preferably, one-way valves are respectively provided on the ash inlet and the ash discharge port. The one-way valve of the ash inlet allows the dust in the conveying pipe 9 to enter the negative pressure tank 16, while the one-way valve of the ash discharge port allows the dust to be discharged outward through the ash discharge port when the pressure in the negative pressure tank 16 increases.

[0043] Specifically, when the transmission shaft 7 rotates, the bevel gear set 13 drives the screw rod 14 to rotate. When the screw rod 14 rotates, it drives the threaded sleeve 17 to make a linear motion along the axial direction of the screw rod 14. When the threaded sleeve 17 moves up, it drives the piston 18 to move up synchronously, so that the pressure in the negative pressure tank 16 is reduced. At this time, negative pressure is formed in the delivery pipe 9, so that the dust scraped off by the scraper 801 can enter the delivery pipe 9 and be collected in the negative pressure tank 16, preventing the filter disc 6 from being blocked by stacked dust, and effectively cleaning and collecting the fine dust on the filter disc 6, so as to further enhance the filtering effect before the engine intake.

[0044] The above-mentioned arrangement of the worm 10 and the turbine 12 is mainly for slowing down the rotation of the screw 14 to ensure that when the pump air structure delivers compressed air toward the filter tank 2, the negative pressure tank 16 is in a negative pressure environment. Therefore, a bottom cover is detachably installed at the bottom of the negative pressure tank 16 to facilitate the subsequent unified cleaning of dust in the negative pressure tank 16.

[0045] A method for filtering air in an air intake system of a combustion engine, using the air filter structure in the air intake system of the combustion engine as described in any one of the above, comprising the following steps: Step 1: When the air pump mechanism is started, the air pump mechanism delivers compressed air to the air inlet pipe 201 of the filter tank 2. Under the filtering action of the filter disc 6, fine dust such as catkins in the compressed air is separated and enters the filter tank 2 for gas-liquid separation; Step 2: When the air pump mechanism is working, it drives the scraping component to scrape and clean the dust on the filter plate 6 to prevent the filter plate 6 from being blocked; Step 3: When the scraping component performs the scraping work, the negative pressure mechanism generates negative pressure, so that the powder ash scraped off by the scraping component is taken away and transported to the negative pressure mechanism.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An air filter structure in an air intake system of a combustion engine, comprising a mounting frame (1) and a filter tank (2) mounted on the mounting frame (1), wherein the filter tank (2) is provided with an air intake pipe (201) and an air outlet pipe (202), respectively, and characterized in that ； A filter disc (6) is detachably mounted in the air intake pipe (201), and the filter disc (6) abuts against a scraping component rotatably arranged in the air intake pipe (201); The filter tank (2) is provided with an air pump mechanism which is in communication with the air inlet pipe (201), and the air pump mechanism is capable of controlling the scraping component to perform a scraping action; A negative pressure mechanism is mounted on the mounting frame (1) and connected to the scraping assembly.

2. The air filter structure in the gas engine intake system according to claim 1, characterized in that: The scraping assembly comprises a scraping member (8) rotatably arranged in the air intake pipe (201), the scraping member (8) being fixed to a transmission shaft (7) rotatably installed in the air intake pipe (201) and having a hollow structure, and the transmission shaft (7) is connected to the air pump mechanism via a reduction transmission member; It also includes a delivery pipe (9) disposed in the transmission shaft (7), one end of the delivery pipe (9) being fixed to the filter disc (6) and communicating with the scraper (8), and the other end of the delivery pipe (9) being communicating with the negative pressure mechanism via a connecting pipe (15).

3. The air filter structure in the gas engine intake system according to claim 2, characterized in that: The scraper (8) comprises a sleeve arranged axially along the transmission shaft (7), a plurality of scrapers (801) are arranged radially along the sleeve, a plurality of through holes (802) are formed on the inclined surface of the scraper (801), and the inner cavity of the scraper (801) is connected to the delivery pipe (9).

4. The air filter structure in the gas engine intake system according to claim 3, characterized in that: The air pump mechanism comprises an impeller assembly (4) mounted on the filter tank (2), the impeller assembly (4) being driven to rotate by a motor (3) mounted on the filter tank (2), the impeller assembly (4) being respectively provided with an air inlet end and an air outlet end, the air outlet end being in communication with the inner side of the air inlet pipe (201) via a conduit (19).

5. The air filter structure in the intake system of a combustion engine according to claim 4, characterized in that: The reduction transmission component comprises a worm gear (10) rotatably connected to the outer wall of the filter tank (2); the worm gear (10) is rotatably connected to a drive shaft (5) rotatably arranged on the filter tank (2) via a belt (11); and the worm gear (10) is meshed with a turbine (12) arranged on the transmission shaft (7).

6. The air filter structure in the intake system of a combustion engine according to claim 2, characterized in that: The negative pressure mechanism comprises a negative pressure tank (16) mounted on the filter tank (2), an ash inlet and an ash outlet being arranged at the bottom of the negative pressure tank (16), and an end of the connecting pipe (15) away from the conveying pipe (9) is connected to the ash inlet; It also includes a pushing component arranged in the negative pressure tank (16).

7. The air filter structure in the gas engine intake system according to claim 6, characterized in that: The pushing assembly comprises a piston (18) sealingly and slidably arranged in the negative pressure tank (16), a threaded sleeve (17) being arranged along the axial direction of the piston (18), the threaded sleeve (17) being threadedly connected to a screw rod (14) rotatably mounted outside the filter tank (2), one end of the screw rod (14) passing through the negative pressure tank (16) and being rotatably connected to the transmission shaft (7) via a bevel gear set (13).

8. The air filter structure in the intake system of a combustion engine according to claim 7, characterized in that: At least one set of limiting sliding grooves (1601) is formed on the inner wall of the negative pressure tank (16), and a limiting sliding block (1801) that slidably cooperates with the limiting sliding grooves (1601) is provided on the piston (18).

9. A method for filtering air in a gas engine intake system, using the gas filter structure in a gas engine intake system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: When the air pump mechanism is started, the air pump mechanism delivers compressed air to the air inlet pipe (201) of the filter tank (2). Under the filtering action of the filter disc (6), fine dust such as catkins in the compressed air is separated and enters the filter tank (2) for gas-liquid separation; Step 2: When the air pump mechanism is working, it drives the scraping component to scrape and clean the dust on the filter plate (6) to prevent the filter plate (6) from being blocked; Step 3: When the scraping component performs the scraping work, the negative pressure mechanism generates negative pressure, so that the powder ash scraped off by the scraping component is taken away and transported to the negative pressure mechanism.

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