Rotor type electric fuel pump integrated with oil inlet filter

Abstract

The invention discloses a rotor type electric fuel pump integrated with an oil inlet filter, and relates to the technical field of fuel pumps, the rotor type electric fuel pump comprises a fuel pump main body, a filtering mechanism is arranged on one side of the fuel pump main body, the filtering mechanism and the fuel pump main body are fixedly connected with each other, and the filtering mechanism is used for filtering fuel. According to the rotor type electric fuel pump integrated with the oil inlet filter, the negative pressure of a fuel pump body serves as a unique power source, when an impurity layer on the outer wall of the filter barrel is thickened till through-flow resistance is increased, the back pressure of a second oil discharging groove is suddenly reduced to form negative pressure, a first spring is compressed by a blocking block to automatically move, a bypass oil way is instantly connected, and the oil inlet filter is switched on. Fuel oil enters the diversion trench through the first bypass pipe to drive the impeller, the impeller directly drives the filtering barrel to rotate at a low speed through key connection, the outer wall of the impeller is attached to the floating scraper at constant pressure, impurities are continuously stripped and collected at the bottom of the box, and parallel operation of bypass oil supply and self-driving net cleaning is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel pumps, in particular to a rotor type electric fuel pump integrated with an oil inlet filter. BACKGROUND

[0002] The rotor type electric fuel pump is the "heart" of the gasoline engine in-cylinder direct injection system, and its task is to deliver the fuel in the fuel tank to the high-pressure fuel pump at a stable pressure and flow rate. The first task of entering the pump body is the oil inlet filter screen, and its reliability directly determines whether the entire fuel supply chain can continue to work.

[0003] The impurities in the actual oil circuit are complex in origin: dust deposited at the oil filler, iron filings carried by the oil gun, rust residues generated during the transportation of the oil tank truck, and the oxidation layer peeled off from the water film on the inner wall of the oil tank due to the temperature difference between day and night, as well as the catalyst powder and gum particles left over during the refining and storage of the fuel, all of which will enter the fuel tank with the fuel and move downstream.

[0004] The existing scheme generally uses a single-layer independent filter cup, and the filtering form is single, the wave height and number are limited by the installation space, and the pollution capacity is limited. When the above-mentioned multiple sources of impurities flow with the fuel to the pump body, the filter screen surface and the wave valley bottom are quickly filled and form a bridging layer, and the flow area decreases sharply. After the blockage, the pump cavity is insufficient for oil suction, and the engine appears difficult to start, power drop and other phenomena. Since the filter screen and the pump body are separately arranged, the flow cannot be restored by relying on the structure itself, and only the pump can be removed and manually cleaned, so the maintenance frequency is high and the user experience is poor. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a rotor type electric fuel pump integrated with an oil inlet filter, which solves the problems raised in the background art.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a rotor type electric fuel pump integrated with an oil inlet filter, comprising a fuel pump body, a filter mechanism is arranged on one side of the fuel pump body, the filter mechanism and the fuel pump body are fixedly connected with each other, the filter mechanism is used for filtering fuel, a switching mechanism is arranged on the top of the filter mechanism, the switching mechanism is used for switching the oil passage, a lift pipe is arranged on one side of the switching mechanism, the inside of the switching mechanism and one end of the bottom of the lift pipe are communicated, one end of the bottom of the lift pipe is communicated with an oil inlet assembly, the oil inlet assembly is used for primary filtering of fuel, a bypass mechanism is arranged on one side of the filter mechanism, the top of the bypass mechanism is communicated with the switching mechanism, the bypass mechanism is used for driving the filter mechanism, the bottom of the bypass mechanism is communicated with an oil discharge mechanism, the oil discharge mechanism is used for filtering the oil passage of the bypass assembly, the oil discharge mechanism is installed on the bottom of the filter mechanism, and a secondary filter mechanism is communicated with the fuel pump body through a connecting pipe.

[0007] Preferably, the switching mechanism comprises a communication block, a communication groove is formed in the communication block, one end of the communication groove is connected with the lifting pipe, the communication groove is in communication with the first oil discharge groove and the second oil discharge groove respectively, the first oil discharge groove is in communication with the inside of the filtering mechanism, and the second oil discharge groove is in communication with the bypass mechanism; the switching mechanism realizes the quick switching of the single valve body to the main filter channel and the bypass channel through the integrated communication groove, the first oil discharge groove and the second oil discharge groove in the communication block; when the filtering mechanism is blocked and the back pressure rises, the oil pressure automatically pushes the blocking block to compress the first spring, the second oil discharge groove is connected instantaneously, fuel continues to flow to the oil discharge mechanism through the bypass mechanism, the engine oil supply is ensured not to be interrupted, and starting difficulty and power reduction are avoided; when the main filter restores the flow back pressure and the first spring pushes the blocking block to reset immediately, the bypass is closed and the main filter is used again.

[0008] Preferably, an annular convex structure is arranged on the inner wall of the communication groove, a blocking block is arranged in the communication groove, the blocking block is located between the first oil discharge groove and the second oil discharge groove, the blocking block is in sliding connection with the inner wall of the communication groove, one end of the blocking block is provided with a first spring, the first spring is located in the communication groove, one end of the first spring is provided with an adjusting block, the adjusting block is fixedly connected with an adjusting screw, and the adjusting screw is in threaded connection with one end of the communication block; the annular convex structure and the sliding blocking block form a self-positioning sealing pair, and only the first spring on one side can realize the non-stuck reciprocating switching of the blocking block between the first oil discharge groove and the second oil discharge groove; the adjusting screw can accurately set the bypass opening pressure by changing the pre-compression amount of the adjusting block.

[0009] Preferably, the filtering mechanism comprises a filter box, a top cover is arranged on the top of the filter box, the top cover is fixedly connected with the communication block, a filter barrel is arranged in the filter box, both ends of the filter barrel are rotatably connected with both ends of the filter box, one side of the filter barrel is attached to the inner wall of the filter box, and the other side of the filter barrel is tightly attached to the surface of a flap, a second spring is arranged between one side of the flap and the inner wall of the filter box, the flap is rotatably connected with a partition plate, the partition plate is fixedly connected with the inner wall of the filter box, and the filter barrel and the partition plate divide the inside of the filter box into two cavities; the filter barrel and the partition plate divide the filter box into two cavities, fuel must pass through the wall, and the filtering area is doubled; the flap is pressed against the outer wall of the filter barrel in real time under the action of the second spring, a dynamic seal is formed, unfiltered fuel is prevented from short-circuiting, and automatic compensation for wear is allowed when the filter barrel rotates at low speed.

[0010] Preferably, the filter barrel is hollow inside, the surface of the filter barrel is provided with a filter screen, the bottom of the filter barrel is tightly attached to the surface of the two scrapers, the bottom of the scraper is fixedly connected to one end of the top of the telescopic rod, one end of the bottom of the telescopic rod is fixedly connected to the bottom of the filter box, the third spring is sleeved outside the telescopic rod, a hole groove is arranged on one side of the filter box and communicates with the inside of the filter barrel, the hole groove on one side of the filter box communicates with the oil discharge mechanism through a pipeline, and a detachable cleaning opening is arranged on the back of the filter box for cleaning the impurities collected in the inside of the filter box; the hollow filter barrel and the double-sided floating scraper always keep the blade edge tightly attached under the constant pressure of the third spring, the impurities on the surface of the screen are scraped off synchronously when the barrel body rotates and fall into the bottom of the box in real time, so that the filter hole is prevented from being blocked to cause flow attenuation; the scraper is self-adapting to wear compensation through the telescopic rod, and adjustment is not required in the service life; the clean oil after filtration is discharged from the oil discharge mechanism through the hole groove in the side wall of the cavity in the barrel, so that the flow channel is shortened and the pressure loss is reduced.

[0011] Preferably, the oil discharge mechanism comprises a filter cavity, the inside of the filter cavity is isolated from the bottom of the filter box, a filter disc is installed on the bottom of the filter cavity through a screw, a filter screen is arranged on the surface of the filter disc, a filter hopper is arranged on the bottom of the filter disc, the filter hopper and the filter disc are of an integrated structure, and the bottom of the filter hopper communicates with the connecting pipe; the filter disc and the filter hopper are integrally formed, so that the sealing interface is eliminated, the risk of leakage is reduced, the fuel oil is collected in the hopper-shaped structure and flows to the connecting pipe at a high speed, and the flow resistance and bubble retention are reduced.

[0012] Preferably, the bypass mechanism comprises a first bypass pipe, the first bypass pipe communicates with a second oil discharge groove, one end of the bottom of the first bypass pipe communicates with a flow guide groove, a impeller is arranged in the inside of the flow guide groove, the impeller is keyed connected to one end of the filter barrel, a sealing cover is installed on one side of the flow guide groove through a screw, the bottom of the flow guide groove communicates with a second bypass pipe, and one end of the bottom of the second bypass pipe communicates with the inside of the filter cavity. The bypass mechanism directly introduces the bypass oil generated when the main filter is blocked into the flow guide groove through the first bypass pipe, the oil flow can drive the impeller to rotate, the impeller drives the filter barrel in real time through the key connection, the "oil control oil" self-cleaning without external power is realized, the flow guide groove and the second bypass pipe form a closed channel, the bypass oil is continuously guided to the downstream secondary filter cavity, and the fuel supply is ensured not to be interrupted.

[0013] Preferably, the oil inlet assembly comprises an oil inlet port, a connecting port is mounted on the top of the oil inlet port, an annular distribution hole groove is arranged at the bottom of the oil inlet port, an inner tube is arranged in the oil inlet port, a gap exists between the top of the inner tube and the top of the oil inlet port, a flow guide pipe is arranged in the inner tube, and the top of the flow guide pipe is connected with the top of the oil inlet port; the annular hole groove at the bottom of the oil inlet port increases the oil absorption area and reduces the inlet flow rate, so that the heavier impurities at the bottom of the oil tank are first blocked outside the hole; the fuel entering the oil inlet port must turn back and cross the gap at the top of the inner tube, and the centrifugal force and gravity are used to throw the larger particles to the bottom of the inner tube to form primary sedimentation, so that mechanical pre-filtering without filter screen is realized; the flow guide pipe directly guides the settled clean oil to the lifting pipe, so that the secondary stirring of impurities is avoided.

[0014] The application provides a rotor type electric fuel pump integrated with an oil inlet filter. The rotor type electric fuel pump integrated with the oil inlet filter takes the negative pressure of the fuel pump body as the only power source, the fuel is sucked into the oil inlet port through the annular hole groove, turns back and crosses the inner tube, mechanical sedimentation of large particles is realized under the synergistic action of the centrifugal force and gravity, and pre-filtering without filter screen is completed; the pre-filtered oil enters the communication groove through the lifting pipe, is injected into the upper cavity of the filter box through the first oil discharge groove, penetrates the rotating filter barrel screen, small particle impurities are intercepted and adhered to the outer wall, the clean oil directly flows into the secondary filter chamber after being collected in the hollow cavity of the barrel, and is supplied to the fuel pump body after being filtered by the filter disc; when the impurity layer on the outer wall of the filter barrel thickens and the flow resistance increases, the back pressure of the second oil discharge groove suddenly decreases to form a negative pressure, the plug compresses the first spring to automatically move, the bypass oil path is instantaneously connected, the fuel enters the flow guide groove to drive the impeller through the first bypass pipe, the impeller directly drives the filter barrel to rotate at low speed through the key connection, the outer wall of the impeller is in constant pressure contact with the floating scraper, the impurities are continuously stripped and collected at the bottom of the box, the "bypass oil supply-self-driven screen cleaning" parallel operation is realized; as the screen surface restores the flow, the negative pressure of the second oil discharge groove decreases, the first spring pushes the plug to reset to cut off the bypass, the impeller stops rotating, and the system seamlessly returns to the main filter mode, and the whole process does not require external energy, sensors and disassembly during shutdown, so that the engine continuously obtains clean fuel through pure mechanical closed loop, the service life of the pump body and the downstream high-pressure system is significantly prolonged, and the maintenance frequency is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the application; Figure 2 It is a schematic diagram of the side view structure of the application; Figure 3 It is a schematic diagram of the switching mechanism structure of the application; Figure 4 It is a schematic diagram of the connection structure of the filter barrel and the filter box of the application; Figure 5 It is a schematic diagram of the bypass mechanism structure of the application; Figure 6 It is a schematic diagram of the filter mechanism structure of the application; Figure 7 It is the schematic diagram of the oil inlet assembly structure of the present application; Figure 8 It is the schematic diagram of the internal structure of the filter box of the present application; Figure 9 It is the schematic diagram of the filter barrel structure of the present application.

[0016] In the figure, 1, fuel pump main body; 2, lifting pipe; 3, switching mechanism; 301, communication block; 302, communication groove; 303, first oil discharge groove; 304, block; 305, first spring; 306, adjusting block; 307, adjusting bolt; 308, second oil discharge groove; 4, filter mechanism; 401, filter box; 402, top cover; 403, partition plate; 404, flap; 405, second spring; 406, filter barrel; 407, scraper; 408, third spring; 409, telescopic rod; 5, oil discharge mechanism; 501, filter cavity; 502, filter disc; 503, filter hopper; 6, bypass mechanism; 601, first bypass pipe; 602, flow guide groove; 603, impeller; 604, sealing cover; 605, second bypass pipe; 7, connecting pipe; 8, oil inlet assembly; 801, oil inlet; 802, inner pipe; 803, flow guide pipe; 804, connecting port. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0018] Embodiment 1: Please refer to Figures 1-9 The embodiment of the present application provides a technical solution: an integrated oil inlet filter rotor type electric fuel pump, comprising a fuel pump main body 1, the fuel pump main body 1 is provided with a filter mechanism 4 on one side, the filter mechanism 4 is fixedly connected with the fuel pump main body 1, the filter mechanism 4 is used for filtering fuel, the filter mechanism 4 is provided with a switching mechanism 3 on the top, the switching mechanism 3 is used for switching the oil passage, the switching mechanism 3 is provided with a lifting pipe 2 on one side, the switching mechanism 3 is communicated with one end of the bottom of the lifting pipe 2, one end of the bottom of the lifting pipe 2 is communicated with an oil inlet assembly 8, the oil inlet assembly 8 is used for primary filtering of fuel, the filter mechanism 4 is provided with a bypass mechanism 6 on one side, the bypass mechanism 6 is communicated with the switching mechanism 3 on the top, the bypass mechanism 6 is used for driving the filter mechanism 4, the bypass mechanism 6 is communicated with an oil discharge mechanism 5 on the bottom, the oil discharge mechanism 5 is used for filtering the oil passage of the bypass assembly, the oil discharge mechanism 5 is installed on the bottom of the filter mechanism 4, the bottom of the two-stage filter mechanism 4 is communicated with the fuel pump main body 1 through a connecting pipe 7; The embodiment integrates the filtering mechanism 4 with the fuel pump body 1, and the switching mechanism 3 forms a switchable valve position between the lift pipe 2 and the filtering mechanism 4. When the primary oil inlet assembly 8 has back pressure rising due to impurity accumulation, the valve core automatically switches position, instantaneously guides the oil path to the bypass mechanism 6, and drives the cleaning brush inside the filtering mechanism 4 to do circumferential scraping by the bypass oil flow, so as to realize "running and cleaning at the same time", without stopping and disassembling the pump, so as to ensure that the engine always obtains sufficient and clean fuel, and eliminates the faults of starting difficulty and power reduction.

[0019] Embodiment 2: Please refer to Figures 1-9The embodiment of the application provides a technical scheme: the switching mechanism 3 comprises a communication block 301, a communication groove 302 is formed in the communication block 301, one end of the communication groove 302 is connected with the lifting pipe 2, the communication groove 302 is in communication with a first oil discharge groove 303 and a second oil discharge groove 308 respectively, the first oil discharge groove 303 is in communication with the inside of the filtering mechanism 4, and the second oil discharge groove 308 is in communication with the bypass mechanism 6; an annular convex structure is arranged on the inner wall of the communication groove 302, a blocking block 304 is arranged in the communication groove 302, the blocking block 304 is located between the first oil discharge groove 303 and the second oil discharge groove 308, the blocking block 304 is in sliding connection with the inner wall of the communication groove 302, one end of the blocking block 304 is provided with a first spring 305, the first spring 305 is located in the communication groove 302, one end of the first spring 305 is provided with an adjusting block 306, the adjusting block 306 is fixedly connected with an adjusting bolt 307, and the adjusting bolt 307 is in threaded connection with one end of the communication block 301; the filtering mechanism 4 comprises a filtering box 401, a top cover 402 is arranged on the top of the filtering box 401, the top cover 402 is fixedly connected with the communication block 301, a filtering barrel 406 is arranged in the filtering box 401, two ends of the filtering barrel 406 are rotatably connected with the two ends in the filtering box 401, one side of the filtering barrel 406 is attached to the inner wall of the filtering box 401, the other side of the outer wall of the filtering barrel 406 is tightly attached to the surface of a flap 404, a second spring 405 is arranged between one side of the flap 404 and the inner wall of the filtering box 401, the top of the flap 404 is rotatably connected with a partition plate 403, the partition plate 403 is fixedly connected with the inner wall of the filtering box 401, and the filtering barrel 406 and the partition plate 403 divide the inside of the filtering box 401 into two cavities in the upper and lower directions; the inside of the filtering barrel 406 is in a hollow structure, a filter screen is arranged on the surface of the filtering barrel 406, the bottom of the filtering barrel 406 is tightly attached to the surface of two scrapers 407, the bottom of the scraper 407 is fixedly connected with one end of the top of an extension rod 409, one end of the bottom of the extension rod 409 is fixedly connected with the bottom of the filtering box 401, a third spring 408 is sleeved outside the extension rod 409, a hole groove is arranged on one side of the filtering box 401 and is in communication with the inside of the filtering barrel 406, the hole groove on one side of the filtering box 401 is in communication with an oil discharge mechanism 5 through a pipeline, and a detachable cleaning port is arranged on the back of the filtering box 401 and is used for cleaning impurities collected in the inside of the filtering box; the oil discharge mechanism 5 comprises a filtering cavity 501, the inside of the filtering cavity 501 is isolated from the bottom of the filtering box 401, a filter disc 502 is arranged on the bottom of the filtering cavity 501 through a screw, a filter screen is arranged on the surface of the filter disc 502, a filter hopper 503 is arranged on the bottom of the filter disc 502, the filter hopper 503 and the filter disc 502 are in an integrated structure, and the bottom of the filter hopper 503 is in communication with a connecting pipe 7.The bypass mechanism 6 comprises a first bypass pipe 601 in communication with the second oil discharge groove 308, a bottom end of the first bypass pipe 601 in communication with a flow guide groove 602, the flow guide groove 602 internally provided with an impeller 603, the impeller 603 in key connection with one end of the filter barrel 406, a sealing cover 604 mounted on one side of the flow guide groove 602 through screws, the bottom of the flow guide groove 602 in communication with a second bypass pipe 605, a bottom end of the second bypass pipe 605 in communication with the inside of the filter cavity 501; The oil preliminarily treated in the embodiment enters into the communication groove 302 inside the communication block 301 through the lifting pipe 2, and then enters into the filter box 401 through the communication groove 302 and the first oil discharge groove 303. The oil enters into the filter barrel 406 inside through the cavity on the upper end of the filter box 401. When passing through the surface of the filter barrel 406, the smaller impurities are intercepted on the surface of the outer wall of the filter barrel 406. The oil filtered further enters into the filter cavity 501 of the oil discharge mechanism 5 through the inside of the filter barrel 406. When the filter hole on the surface of the filter barrel 406 is covered by impurities, the oil cannot pass through the inside of the filter box 401, and the negative pressure suction force is generated in the second oil discharge groove 308, so that the blocking block 304 can compress the first spring 305, and one end of the second oil discharge groove 308 can be in communication with the communication groove 302, so that the oil can enter into the inside of the first bypass pipe 601 through the second oil discharge groove 308, enter into the inside of the flow guide groove 602 through the first bypass pipe 601, and the oil body can drive the impeller 603 inside the flow guide groove 602 to rotate, and then be discharged through the second bypass pipe 605, enter into the filter cavity 501, and be filtered through the filter disc 502. After being filtered, the oil enters into the inside of the fuel pump body 1. The impeller 603 rotates while driving the filter barrel 406 to rotate. The filter barrel 406 rotates while contacting the surface of the scraper 407, so that the scraper 407 can scrape the impurities on the surface of the filter barrel 406 and drop into the filter box 401, so that it can be automatically cleaned. When the surface of the filter barrel 406 is cleaned and can flow, the negative pressure in the second oil discharge groove 308 is reduced, so that the first spring 305 can drive the blocking block 304 to reset, so that the second oil discharge groove 308 can be closed, so that the bypass mechanism 6 can be closed and flow, so that the inside of the filter box 401 can be restored to flow, so that the oil can be continuously filtered. The mechanism can automatically trigger the bypass mechanism 6 when the filter barrel 406 is blocked, so as to avoid affecting the oil in the oil tank to supply the inside of the fuel pump body 1. At the same time, the bypass mechanism 6 can automatically clean and collect the impurities covered on the surface of the filter barrel 406.

[0020] Embodiment 3: see Figures 1-9The embodiment of the present application provides a technical scheme: the oil inlet assembly 8 includes an oil inlet 801, the top of the oil inlet 801 is provided with a connecting port 804, the bottom of the oil inlet 801 is provided with an annular distribution hole groove, the inside of the oil inlet 801 is provided with an inner tube 802, the top of the inner tube 802 is connected with the top of the oil inlet 801, and the inside of the inner tube 802 is provided with a flow guide pipe 803; When the device is used, the oil in the oil tank can be sucked into the inside of the oil inlet assembly 8 through the suction force generated by the fuel pump body 1, the oil in the oil tank is sucked into the inside of the oil inlet 801 through the hole groove on the surface of the oil inlet 801, and then is turned up to the inside of the inner tube 802 and flows downward to the inside of the inner tube 802, so that the impurity particles in the oil can be preliminarily deposited at the bottom end of the inner tube 802 under the action of gravity and centrifugal force, and then the larger impurity particles in the oil can be preliminarily filtered.

[0021] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0022] In addition, it should be understood that although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A rotor-type electric fuel pump with an integrated inlet filter, characterized in that: The system includes a fuel pump body (1), a filter mechanism (4) on one side of the fuel pump body (1), the filter mechanism (4) being fixedly connected to the fuel pump body (1), the filter mechanism (4) being used to filter fuel, a switching mechanism (3) on the top of the filter mechanism (4) being used to switch fuel passages, a riser pipe (2) on one side of the switching mechanism (3), the interior of the switching mechanism (3) being connected to one bottom end of the riser pipe (2), and one bottom end of the riser pipe (2) being connected to the fuel inlet assembly (8). The oil inlet assembly (8) is used for primary fuel filtration. A bypass mechanism (6) is provided on one side of the filter mechanism (4). The top of the bypass mechanism (6) is connected to the switching mechanism (3). The bypass mechanism (6) is used to drive the filter mechanism (4). The bottom of the bypass mechanism (6) is connected to the oil discharge mechanism (5). The oil discharge mechanism (5) is used to filter the oil circuit of the bypass assembly. The oil discharge mechanism (5) is installed at the bottom of the filter mechanism (4). The bottom of the secondary filter mechanism (4) is connected to the fuel pump body (1) through a connecting pipe (7).

2. The rotor-type electric fuel pump with integrated inlet filter according to claim 1, characterized in that: The switching mechanism (3) includes a connecting block (301), and a connecting groove (302) is provided inside the connecting block (301). One end of the connecting groove (302) is connected to the lifting pipe (2). The interior of the connecting groove (302) is connected to the first oil drain groove (303) and the second oil drain groove (308) respectively. The first oil drain groove (303) is connected to the interior of the filter mechanism (4), and the second oil drain groove (308) is connected to the bypass mechanism (6).

3. The rotor-type electric fuel pump with integrated inlet filter according to claim 2, characterized in that: The inner wall of the connecting groove (302) is provided with an annular protruding structure. A block (304) is provided inside the connecting groove (302). The block (304) is located between the first oil drain groove (303) and the second oil drain groove (308). The block (304) is slidably connected to the inner wall of the connecting groove (302). A first spring (305) is provided at one end of the block (304). The first spring (305) is located inside the connecting groove (302). An adjusting block (306) is provided at one end of the first spring (305). The adjusting block (306) is fixedly connected to an adjusting bolt (307). The adjusting bolt (307) is threadedly connected to one end of the connecting block (301).

4. The rotor-type electric fuel pump with integrated inlet filter according to claim 3, characterized in that: The filtration mechanism (4) includes a filter box (401), a top cover (402) is installed on the top of the filter box (401), the top cover (402) is fixedly connected to the connecting block (301), a filter barrel (406) is provided inside the filter box (401), the two ends of the filter barrel (406) are rotatably connected to the two ends inside the filter box (401), one side of the filter barrel (406) is in contact with the inner wall of the filter box (401), the other side of the filter barrel (406) is tightly in contact with the surface of the flip plate (404), a second spring (405) is provided between one side of the flip plate (404) and the inner wall of the filter box (401), the top of the flip plate (404) is rotatably connected to the partition plate (403), the partition plate (403) is fixedly connected to the inner wall of the filter box (401), and the filter barrel (406) and the partition plate (403) divide the interior of the filter box (401) into upper and lower cavities.

5. The rotor-type electric fuel pump with integrated inlet filter according to claim 4, characterized in that: The filter barrel (406) has a hollow structure inside. A filter screen is provided on the surface of the filter barrel (406). The bottom of the filter barrel (406) is in close contact with the surfaces of two scrapers (407). The bottom of the scraper (407) is fixedly connected to the top end of the telescopic rod (409). The bottom end of the telescopic rod (409) is fixedly connected to the bottom of the filter box (401). A third spring (408) is fitted on the outside of the telescopic rod (409). A slot is provided on one side of the filter box (401) to communicate with the inside of the filter barrel (406). The slot on one side of the filter box (401) is connected to the oil draining mechanism (5) through a pipe.

6. The rotor-type electric fuel pump with integrated inlet filter according to claim 5, characterized in that: The oil discharge mechanism (5) includes a filter chamber (501), the interior of which is isolated from the filter box (401). A filter disc (502) is installed at the bottom of the filter chamber (501) by screws. A filter screen is provided on the surface of the filter disc (502). A filter bucket (503) is provided at the bottom of the filter disc (502). The filter bucket (503) and the filter disc (502) are an integral structure. The bottom of the filter bucket (503) is connected to the connecting pipe (7).

7. The rotor-type electric fuel pump with integrated inlet filter according to claim 6, characterized in that: The bypass mechanism (6) includes a first bypass pipe (601), which is connected to the second oil drain trough (308). One end of the bottom of the first bypass pipe (601) is connected to the guide channel (602). An impeller (603) is provided inside the guide channel (602). The impeller (603) is keyed to one end of the filter barrel (406). A sealing cover (604) is installed on one side of the guide channel (602) by screws. The bottom of the guide channel (602) is connected to the second bypass pipe (605). One end of the bottom of the second bypass pipe (605) is connected to the inside of the filter chamber (501).

8. The rotor-type electric fuel pump with integrated inlet filter according to claim 7, characterized in that: The oil inlet assembly (8) includes an oil inlet (801), a connection port (804) is installed on the top of the oil inlet (801), and an annularly distributed perforated groove is provided at the bottom of the oil inlet (801). An inner tube (802) is provided inside the oil inlet (801), and there is a gap between the top end of the inner tube (802) and the top of the oil inlet (801). A guide tube (803) is provided inside the inner tube (802), and the top of the guide tube (803) is connected to the top of the oil inlet (801).

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