Oil pump, fuel system and vehicle

Abstract

The utility model discloses an oil pump, a fuel system and a vehicle. The oil pump is provided with an oil storage cavity and an oil outlet and further comprises a diffraction pump and a pressure regulating valve. The oil outlet is communicated with an inlet of the pressure regulating valve, an outlet of the pressure regulating valve is communicated with an inlet of the diffraction pump, and an outlet of the diffraction pump is communicated with the oil storage cavity; the diffraction pump and / or the pressure regulating valve are / is installed on a pump shell of the oil pump. When the oil pump is applied, connecting pipelines needed by arrangement of the oil pump can be reduced, the structure is compact, and the space of the oil pump can be saved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to an oil pump, a fuel system, and a vehicle. Background Art

[0002] With the development of new energy vehicles, hybrid vehicle models are increasingly recognized by the market due to advantages such as low fuel consumption, high endurance, and good power performance. The oil pump of a hybrid vehicle model usually supplies fuel to the engine through a fuel supply pipe, and a pressure regulating valve is provided to adjust the pressure inside the fuel supply pipe to ensure a certain pressure inside the fuel supply pipe. At the same time, a diffraction pump is provided to suck the fuel inside the fuel tank into the oil storage barrel to ensure that there is enough fuel inside the oil storage barrel for the pump core to use.

[0003] In the related art, the diffraction pump and the pressure regulating valve are independently arranged outside the pump housing of the oil pump, and the fuel pumped by the oil pump is connected to the inlet of the diffraction pump through one pipeline and to the inlet of the pressure regulating valve through another pipeline. In this way, the diffraction pump and the pressure regulating valve are arranged in parallel outside the pump housing, so that the pump core is connected to the two through two relatively long pipelines respectively, resulting in more connecting pipelines required for the layout of the oil pump and occupying more space of the oil pump.

[0004] Therefore, how to provide a solution to overcome or alleviate the above defects is still a technical problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0005] The purpose of the present application is to provide an oil pump to reduce the connecting pipelines required for the layout of the oil pump, with a relatively compact structure, which is beneficial to saving the space of the oil pump. Another purpose of the present application is to provide a fuel system. Still another purpose of the present application is to provide a vehicle.

[0006] To solve the above technical problems, the present application provides an oil pump, which has an oil storage cavity and an oil outlet, and the oil pump includes a diffraction pump and a pressure regulating valve;

[0007] The oil outlet communicates with the inlet of the pressure regulating valve, the outlet of the pressure regulating valve communicates with the inlet of the diffraction pump, and the outlet of the diffraction pump communicates with the oil storage cavity; the diffraction pump and / or the pressure regulating valve is installed on the pump housing of the oil pump.

[0008] The oil pump provided by the present application reduces the connecting pipelines required for the layout of the oil pump by connecting the pressure regulating valve and the diffraction pump in series and installing the diffraction pump and / or the pressure regulating valve on the pump housing of the oil pump. The return oil of the oil pump first flows through the pressure regulating valve and then through the diffraction pump. Compared with the solution in the related art where the pressure regulating valve and the diffraction pump are arranged in parallel outside the pump housing, it can reduce the connecting pipelines required for the layout of the oil pump, with a relatively compact structure, which is beneficial to saving the space of the oil pump.

[0009] Optionally, the oil pump further includes an adapter pipe, a pressure relief valve, a fuel supply pipe, and a return pipe;

[0010] The adapter pipe includes a plurality of interconnected pipe segments, one of the pipe segments is connected to the oil outlet, and the remaining pipe segments are respectively connected to the pressure relief valve, the inlet of the fuel supply pipe, and the inlet of the return pipe. The outlet of the fuel supply pipe is connected to the engine, and the outlet of the return pipe is connected to the pressure regulating valve.

[0011] Optionally, the pressure regulating valve has a first inlet and a first outlet that can be conducted under a preset pressure. The diffusion pump has an oil suction port, a second inlet, and a second outlet;

[0012] The outlet of the return pipe is connected to the first inlet, the first outlet is connected to the second inlet, the second inlet and the oil suction port are both connected to the second outlet, and the second outlet is connected to the oil storage cavity.

[0013] Optionally, the oil pump further includes a suction pipe;

[0014] The second outlet is connected to the oil storage cavity through the suction pipe; at least part of the return pipe is integrally formed with the pump housing of the oil pump, and / or at least part of the suction pipe is integrally formed with the pump housing of the oil pump.

[0015] Optionally, one of the pipe segments forms a first pipe, and the pressure relief valve is arranged in the first pipe;

[0016] The pressure relief valve includes a first valve seat and a first valve core arranged on the first valve seat. The first valve seat is provided with a pressure relief hole, and the first valve core is used to connect or cut off the oil outlet and the pressure relief hole.

[0017] Optionally, the oil pump further includes a stop member;

[0018] The stop member is connected to the first pipe, and a pressure relief gap is defined between the stop member and the first pipe. The inlet end of the pressure relief gap is connected to the pressure relief hole, the outlet end of the pressure relief gap opens in the direction of the oil outlet, and the outlet end of the pressure relief gap is directly connected to the cavity inside the fuel tank.

[0019] Optionally, the stop member includes an end cap;

[0020] The end cap is sleeved on the first pipe, and the pressure relief gap is defined between the inner side wall of the end cap and the outer side wall of the first pipe. The pressure relief hole is opposite to the inner top wall of the end cap.

[0021] Optionally, one of the end cap and the first pipe is provided with a clamping groove, and the other is provided with a clamping block, and the clamping block is clamped with the clamping groove.

[0022] Optionally, the stop member further includes a taper tip;

[0023] The conical tip is provided on the inner top wall of the end cap, and the tip of the conical tip extends towards the direction of the pressure relief hole.

[0024] Optionally, the pressure relief hole penetrates the first valve seat along the axial direction of the first pipe, and the pressure relief hole and the conical tip are located on the same axis.

[0025] Optionally, the pressure relief valve further includes a first elastic member;

[0026] One end of the first elastic member is connected to the first valve seat, the other end of the first elastic member is connected to the first valve core, a pressure relief port is provided on the first pipe, the pressure relief port is communicated with the oil outlet, and the first elastic member has an elastic force for driving the first valve core to close the pressure relief port.

[0027] Optionally, the oil pump further includes a check valve;

[0028] The check valve includes a second valve core, the second valve core is provided in the pump core of the oil pump, the oil outlet is communicated with the pump core, and the second valve core is used to open or close the oil outlet.

[0029] This application also provides a fuel system, including a fuel tank and the oil pump described above;

[0030] The oil pump is installed in the fuel tank.

[0031] By connecting the pressure regulating valve and the diffuser pump in series in the fuel system provided by this application, the return oil of the oil pump first flows through the pressure regulating valve and then through the diffuser pump. Compared with the scheme of connecting the pressure regulating valve and the diffuser pump in parallel in the related art, it can reduce the connecting pipelines required for the layout of the oil pump, the structure is relatively compact, and it is beneficial to save the space of the oil pump.

[0032] This application also provides a vehicle, including the fuel system described above.

[0033] By connecting the pressure regulating valve and the diffuser pump in series in the vehicle provided by this application, the return oil of the oil pump first flows through the pressure regulating valve and then through the diffuser pump. Compared with the scheme of connecting the pressure regulating valve and the diffuser pump in parallel in the related art, it can reduce the connecting pipelines required for the layout of the oil pump, the structure is relatively compact, and it is beneficial to save the space of the oil pump. Brief Description of the Drawings

[0034] Figure 1 It is a simplified installation diagram of the oil pump according to the embodiment provided by this application;

[0035] Figure 2 It is a partial cross-sectional view of the oil pump according to the embodiment provided by this application at the first position;

[0036] Figure 3 It is a cross-sectional view of the oil pump according to the embodiment provided by this application at the second position;

[0037] Figure 4 Cross-sectional view of the oil pump in the third position of the embodiment provided by this application;

[0038] Figure 5 Installation schematic diagram of the transfer pipe and the pressure relief valve of the oil pump in the embodiment provided by this application;

[0039] Figure 6 Cross-sectional installation view of the transfer pipe and the end cap of the oil pump in the embodiment provided by this application.

[0040] The reference numerals in the above drawings are explained as follows:

[0041] 1 - Pump body, 11 - Pump core, 111 - Oil outlet, 12 - Pump housing;

[0042] 2 - Transfer pipe, 21 - First pipe, 211 - Clamping block, 212 - Installation cavity, 22 - Pressure relief port, 23 - Pressure relief gap;

[0043] 3 - Pressure relief valve, 31 - First valve seat, 311 - Pressure relief hole, 32 - First valve core, 33 - First elastic member;

[0044] 4 - Stopper, 41 - End cap, 42 - Tapered tip, 43 - Card slot;

[0045] 5 - Check valve;

[0046] 61 - Oil supply pipe, 62 - Oil return pipe, 63 - Oil suction pipe;

[0047] 7 - Diffraction pump, 71 - Oil suction port, 72 - Second inlet, 73 - Second outlet;

[0048] 8 - Pressure regulating valve, 81 - First inlet, 82 - First outlet;

[0049] 91 - Fuel tank, 92 - Engine. Detailed implementation manners

[0050] In order to enable those skilled in the art to better understand the solution of this application, the following further detailed description of this application will be given in conjunction with the drawings and specific implementation manners.

[0051] It should be particularly noted that: the terms "first", "second", etc. in this application are only for facilitating the description of two or more structures or components with the same or similar structures and / or functions, and do not represent a certain special limitation on the order and / or importance.

[0052] In this application, unless otherwise clearly specified or limited, the term "connection" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to specific circumstances.

[0053] Please refer to Figures 1 to 4 , Figure 1 which is a schematic installation diagram of the oil pump of the embodiment provided by this application, Figure 2 which is a partial sectional view of the oil pump of the embodiment provided by this application at the first position, Figure 3 which is a sectional view of the oil pump of the embodiment provided by this application at the second position, Figure 4 which is a sectional view of the oil pump of the embodiment provided by this application at the third position.

[0054] In the embodiment provided by this application, the oil pump has an oil storage chamber and an oil outlet 111. The oil pump includes a diffraction pump 7 and a pressure regulating valve 8; the oil outlet 111 is communicated with the inlet of the pressure regulating valve 8, the outlet of the pressure regulating valve 8 is communicated with the inlet of the diffraction pump 7, and the outlet of the diffraction pump 7 is communicated with the oil storage chamber; the diffraction pump 7 and the pressure regulating valve 8 are installed on the pump housing 12 of the oil pump.

[0055] It can be understood that the oil pump includes a pump body 1. The pump body 1 can be arranged in the cavity inside the fuel tank 91. The pump body 1 includes a pump core 11 and a pump housing 12. The pump housing 12 is provided with the above-mentioned oil storage chamber and the above-mentioned oil outlet 111. The pump core 11 is arranged in the oil storage chamber. The pump core 11 is communicated with the oil outlet 111, and the oil outlet 111 can also be communicated with an oil supply pipe 61 to supply oil to the engine 92 through the oil supply pipe 61.

[0056] Compared with the related art where a pressure regulating valve and a diffuser pump are connected in parallel and independently arranged outside the pump housing, such that the oil pump needs to be connected to each of them through two relatively long pipelines. On the one hand, in the oil pump provided by the embodiment of the present application, by connecting the pressure regulating valve 8 and the diffuser pump 7 in series, the oil outlet 111 of the oil pump only needs to be connected to the pressure regulating valve 8 through a connecting pipeline. On this basis, the outlet of the pressure regulating valve 8 is communicated with the inlet of the diffuser pump 7, so that the pressure inside the fuel supply pipe 61 can be adjusted by using the pressure regulating valve 8 to ensure that there is a certain pressure inside the fuel supply pipe 61. After the oil returning through the pressure regulating valve 8 enters the diffuser pump 7, the diffuser pump 7 can be used to suck the fuel inside the fuel tank 91 into the oil storage cavity to ensure that there is sufficient fuel inside the oil storage cavity for the pump core 11 to use. In this way, the connecting pipelines required for the layout of the oil pump can be reduced, making the structure of the oil pump relatively compact, which is beneficial to saving the space inside the oil pump. At the same time, it is also beneficial to reducing the production cost of the oil pump. On the other hand, in the oil pump provided by the embodiment of the present application, the diffuser pump 7 and the pressure regulating valve 8 are directly installed on the pump housing 12, which is beneficial to reducing the length and quantity of the external connecting pipelines and reducing the complexity of the external connecting pipelines, further saving the space of the oil pump, making the structure of the oil pump more compact, reducing the assembly cost, and at the same time, it is also beneficial to simplifying the subsequent maintenance and repair processes. In addition, such an integrated design is also beneficial to reducing potential leakage points to improve the sealing performance and reliability of the oil pump.

[0057] It should be noted that in the above embodiment of the present application, both the diffuser pump 7 and the pressure regulating valve 8 are installed on the pump housing 12 of the oil pump. In fact, it is also possible to arrange the diffuser pump 7 inside the pump housing 12 and the pressure regulating valve 8 outside the pump housing 12, or arrange the pressure regulating valve 8 inside the pump housing 12 and the diffuser pump 7 outside the pump housing 12, without specific limitation.

[0058] As Figure 1 and Figure 2 shown, in the embodiment of the present application, the oil pump further includes a transfer pipe 2, a pressure relief valve 3, a fuel supply pipe 61, and a fuel return pipe 62; the transfer pipe 2 includes a plurality of interconnected pipe segments, one of which is communicated with the oil outlet 111, and the remaining pipe segments are respectively connected to the pressure relief valve 3, the inlet of the fuel supply pipe 61, and the inlet of the fuel return pipe 62. The outlet of the fuel supply pipe 61 is connected to the engine 92 to supply fuel to the engine 92, and the outlet of the fuel return pipe 62 is connected to the pressure regulating valve 8 to return oil to the pressure regulating valve 8.

[0059] With such a setting, when the oil pump is working, the fuel discharged from the oil outlet 111 can be divided into three paths through the transfer pipe 2. One path is diverted to the engine 92, the second path is diverted to the pressure regulating valve 8, and the third path is diverted to the pressure relief valve 3, making the structure of the oil pump more compact and more beneficial to reducing the connecting pipelines required for the layout of the oil pump to further save the space of the oil pump.

[0060] In actual setting, the structures of the pressure regulating valve 8 and the diffuser pump 7 are not limited.

[0061] Please understand in combination with Figure 3 and Figure 4 that in the embodiments provided by the present application, the pressure regulating valve 8 has a first inlet 81 and a first outlet 82 that can be conducted under a preset pressure, and the diffraction pump 7 has an oil suction port 71, a second inlet 72, and a second outlet 73; the outlet of the return oil pipe 62 is communicated with the first inlet 81, the first outlet 82 is communicated with the second inlet 72, both the second inlet 72 and the oil suction port 71 are communicated with the second outlet 73, and the second outlet 73 is communicated with the oil storage chamber.

[0062] During use, the fuel inside the oil storage chamber is shunted under the action of the pump core 11 after passing through the oil outlet 111. Among them, a part of the fuel enters the return oil pipe 62, then enters the pressure regulating valve 8 through the first inlet 81, and then enters the diffraction pump 7 through the first outlet 82 and the second inlet 72. Since the oil suction port 71 is communicated with the cavity inside the fuel tank 91, the diffraction pump 7 uses the siphon effect to suck the fuel inside the fuel tank 91 into the inside of the diffraction pump 7 through the oil suction port 71, and then sends the fuel back to the oil storage chamber from the second outlet 73 to ensure that there is enough fuel inside the oil storage chamber for the pump core 11 to use. In this way, the structures of the pressure regulating valve 8 and the diffraction pump 7 are relatively simple, making the structure of the oil pump more compact.

[0063] As Figure 4 shown, in the embodiments of the present application, the oil pump further includes a suction pipe 63; the second outlet 73 is communicated with the oil storage chamber through the suction pipe 63; at least part of the return oil pipe 62 and the pump housing 12 of the oil pump are integrally formed, and at least part of the suction pipe 63 and the pump housing 12 of the oil pump are integrally formed.

[0064] In this way, compared with the related art in which the suction pipe 63 and the return oil pipe 62 are independently arranged outside the pump housing 12, occupying a large installation space and possibly requiring welding or joint connection to install the suction pipe 63 and the return oil pipe 62, in the oil pump provided by the embodiments of the present application, at least part of the return oil pipe 62 and at least part of the suction pipe 63 are directly formed on the pump housing 12, making these pipes a part of the pump housing 12, which can further reduce the installation space occupied by the oil pipes during the assembly of the oil pump, making the structure of the oil pump more compact, and can also reduce the use of additional connecting parts, reduce the production cost. At the same time, it is also beneficial to improve the stability of the overall structure of the oil pump. In addition, the integral forming process is also beneficial to improving the automation degree of the oil pump production process and improving the production efficiency.

[0065] It should be noted that only part of the return oil pipe 62 and the pump housing 12 can be integrally formed, or only part of the suction pipe 63 and the pump housing 12 can be integrally formed, and there is no specific limitation.

[0066] Please also refer to Figure 5 , Figure 5 which is the installation schematic diagram of the adapter pipe and the pressure relief valve in the oil pump of the embodiments provided by the present application.

[0067] During actual installation, one pipe section of the above-mentioned adapter pipe 2 is connected to the pressure relief valve 3. It can be the connection between this pipe section and the inlet of the pressure relief valve 3, or the pressure relief valve 3 can be arranged inside this pipe section, and there is no specific limitation.

[0068] In the embodiments provided by the present application, as Figure 1 , Figure 2 and Figure 5 shown, the oil pump further includes a pressure relief valve installation structure; the pressure relief valve installation structure includes a first pipe 21 and the above-mentioned pressure relief valve 3. One pipe section of the adapter pipe 2 constitutes the first pipe 21, and the pressure relief valve 3 is arranged inside the first pipe 21; the pressure relief valve 3 includes a first valve seat 31 and a first valve core 32 arranged on the first valve seat 31. A pressure relief hole 311 is provided on the first valve seat 31, and the first valve core 32 is used to connect or cut off the oil outlet 111 and the pressure relief hole 311.

[0069] The oil pump provided by the above-mentioned embodiment of the present application is provided with a pressure relief valve installation structure. The oil output by the oil pump can enter the first pipe 21 through the oil outlet 111. Since the first valve core 32 can connect or cut off the oil outlet 111 and the pressure relief hole 311, when pressure relief is required, for example, when the oil pump stops working, the first valve core 32 can connect the pressure relief hole 311 and the oil outlet 111 to discharge the oil discharged from the oil pump through the pressure relief hole 311. In this way, it is not necessary to install a pressure relief pipeline at the position of the pressure relief hole 311, and the oil can be directly discharged through the pressure relief hole 311 to complete the pressure relief work of the pressure relief valve 3, which can further reduce the number of oil pipe arrangements, make the structure of the oil pump more compact, and is beneficial to further reducing production costs. In addition, since the pressure relief valve installation structure does not need to install a pressure relief pipeline at the position of the pressure relief hole 311, the pressure relief time of the pressure relief valve installation structure can be shortened, and it can be ensured that no bubbles are easily generated in the supply oil pipe 61.

[0070] Please refer to Figure 6 , Figure 6 , which is the installation cross-sectional view of the adapter pipe and the end cap in the oil pump of the embodiment provided by the present application.

[0071] Please understand in combination with Figure 2 and Figure 6 that in the embodiments provided by the present application, the oil pump further includes a stopper 4; the stopper 4 is connected to the first pipe 21, and a pressure relief gap 23 is defined between the stopper 4 and the first pipe 21, and the inlet end of the pressure relief gap 23 is communicated with the pressure relief hole 311.

[0072] It can be understood that by providing the stopper 4 and defining a pressure relief gap 23 between the stopper 4 and the first pipe 21, the fuel discharged from the pressure relief hole 311 can first enter the pressure relief gap 23 and then flow into the cavity inside the fuel tank 91, so as to realize the diversion of the discharged fuel and prevent it from splashing onto the inner wall of the fuel tank 91.

[0073] In actual setting, the pressure relief gap 23 can extend in the horizontal direction or in the vertical direction, and there is no specific limitation.

[0074] As an alternative solution, as Figure 6 shown, the pressure relief gap 23 can be set to extend in the vertical direction, and the outlet end of the pressure relief gap 23 is arranged downward, so that the oil discharged from the pressure relief gap 23 can flow back into the oil storage cavity of the pump housing 12, and the return speed is also relatively fast. In this way, the oil is not likely to splash onto the inner wall of the fuel tank 91.

[0075] Specifically, the outlet end of the pressure relief gap 23 can be opened in the direction of the oil outlet 111, and the outlet end of the pressure relief gap 23 can be directly communicated with the cavity inside the fuel tank 91. It is not difficult to understand that the upper end of the oil storage cavity of the pump housing 12 can be opened to communicate with the cavity inside the fuel tank 91. Since the outlet end of the pressure relief gap 23 is opened in the direction of the oil outlet 111 and the outlet end of the pressure relief gap 23 is directly communicated with the cavity inside the fuel tank 91, the oil discharged therefrom can flow downward under the action of gravity and directly flow back into the oil storage cavity of the pump housing 12, thereby avoiding the oil discharged from the pressure relief gap 23 from splashing onto the inner wall of the fuel tank 91.

[0076] It can be seen that, compared with the related art in which the pressure relief end of the pressure relief valve is connected to the oil pump through a pressure relief pipeline, in the above embodiment of the present application, by providing the above pressure relief valve installation structure, there is no need to install a pressure relief pipeline at the position of the pressure relief hole 311. The oil is discharged into the pressure relief gap 23 under the action of the stop member 4 through the pressure relief hole 311, and then can be directly discharged into the cavity inside the fuel tank 91 through the pressure relief gap 23 and quickly flow back into the oil storage cavity of the pump housing 12, so that the pressure relief operation can be realized. The number of oil pipe arrangements can be reduced, the structure is relatively compact, and there will be no problem of disorderly splashing of oil when the pressure relief valve 3 relieves pressure.

[0077] In actual setting, the specific structure of the stop member 4 is not limited.

[0078] In the embodiment provided by the present application, as Figure 6 shown, the stop member 4 includes an end cap 41; the end cap 41 is sleeved on the first pipe 21, and the inner side wall of the end cap 41 and the outer side wall of the first pipe 21 define the pressure relief gap 23, and the pressure relief hole 311 is opposite to the inner top wall of the end cap 41.

[0079] It can be understood that, as Figure 5As shown, a pressure relief port 22 can be provided at one end of the first pipe 21 facing away from the pressure relief hole 311. An installation cavity 212 can be provided inside the first pipe 21. The pressure relief valve 3 can be disposed in the installation cavity 212. One end of the installation cavity 212 can communicate with the pressure relief port 22, and the other end of the installation cavity 212 can communicate with the pressure relief hole 311. Among them, the other end of the installation cavity 212, that is, the end of the installation cavity 212 facing away from the pressure relief port 22, is the port of the first pipe 21, and the end cap 41 is sleeved at the port position of the first pipe 21. The inner top wall of the end cap 41 is opposite to and spaced apart from the port of the first pipe 21, and the inner side wall of the end cap 41 is spaced apart from the outer side wall of the first pipe 21 to define a pressure relief gap 23. Thus, when the pressure relief valve 3 is opened at a certain pressure value, the discharged oil can flow out through the pressure relief gap 23.

[0080] By setting the stop member 4 as the above structure in the oil pump provided in the above embodiment of the present application, the pressure relief structure of the adapter pipe 2 can be made simple and convenient for processing and manufacturing. In addition, the oil discharged from the adapter pipe 2 can impact the inner top wall of the end cap 41 and then flow out through the pressure relief gap 23, which can reduce the momentum of the ejected oil and is more conducive to avoiding the disorderly splashing of the oil during pressure relief.

[0081] In actual setting, the connection method between the end cap 41 and the first pipe 21 is not limited.

[0082] In an embodiment provided by the present application, the end cap 41 and the first pipe 21 can be snap-connected. One of the end cap 41 and the first pipe 21 is provided with a card slot 43, and the other is provided with a card block 211, and the card block 211 and the card slot 43 are snap-connected. For example, as Figure 5 and Figure 6 shown, the end cap 41 is provided with a card slot 43, and the first pipe 21 is provided with a card block 211. Specifically, the end cap 41 can be provided with card slots 43 on both sides along its radial direction, and two card blocks 211 can be provided on the outer side wall of the first pipe 21, and the two card blocks 211 can be snap-connected to the two card slots 43 one by one. Thus, it is convenient for the installation and disassembly of the end cap 41. When the end cap 41 is damaged by the impact of fuel for a long time, it is beneficial to quickly replace the end cap 41. At the same time, the end cap 41 is relatively easy to process and manufacture and has a good use effect.

[0083] As Figure 6 shown, in the embodiment provided by the present application, the stop member 4 further includes a taper tip 42; the taper tip 42 is disposed on the inner top wall of the end cap 41, and the tip of the taper tip 42 extends in the direction of the pressure relief hole 311.

[0084] It can be understood that the taper tip 42 can be a conical structure or a pyramid structure, and the present application does not limit this. The taper tip 42 is arranged facing the port of the first pipe 21. For example, the center line of the taper tip 42 can be on the same straight line as the axis of the port of the first pipe 21.

[0085] During use, after the pressure relief valve 3 is opened at a certain pressure value, the discharged oil flows out through the port of the first pipe 21 and can impact the tip of the taper tip 42. Under the action of the taper tip 42, the oil can be dispersed by the taper tip 42 and then evenly flow along the radial direction of the end cap 41 to the periphery of the pressure relief gap 23. Thus, the momentum of the ejected oil can be further reduced, which is more conducive to avoiding the disordered splashing of the oil during pressure relief.

[0086] In the embodiment of the present application, as Figure 6 shown, the pressure relief hole 311 penetrates through the first valve seat 31 along the axial direction of the first pipe 21, and the pressure relief hole 311 and the taper tip 42 are located on the same axis. In this way, the oil discharged from the pressure relief hole 311 can be further dispersed by the taper tip 42 and evenly flow along the radial direction of the end cap 41 to the periphery of the pressure relief gap 23, so that the momentum of the ejected oil can be further reduced.

[0087] Please combine Figure 5 to understand that in the embodiment of the present application, the pressure relief valve 3 further includes a first elastic member 33; one end of the first elastic member 33 is connected to the first valve seat 31, the other end of the first elastic member 33 is connected to the first valve core 32, a pressure relief port 22 is provided on the first pipe 21, the pressure relief port 22 is communicated with the oil outlet 111, and the first elastic member 33 has an elastic force for driving the first valve core 32 to close the pressure relief port 22.

[0088] It is not difficult to understand that when the pressure at the pressure relief port 22 reaches a certain threshold value, the oil can overcome the elastic force of the first elastic member 33, thereby pushing the first valve core 32 open, and then the oil can be discharged through the pressure relief port 22 and the pressure relief hole 311 in sequence.

[0089] Specifically, the first valve seat 31 can be arranged adjacent to the port position of the first pipe 21 and be relatively fixed to the first pipe 21, and the first valve core 32 can be slidably matched with the first valve seat 31. The first elastic member 33 can be a spring, the first elastic member 33 is sleeved on the first valve core 32, and the first elastic member 33 can press the first valve core 32 in the direction of the pressure relief port 22, so that the first valve core 32 blocks the pressure relief port 22 under the elastic action of the first elastic member 33. When the oil pressure in the adapter pipe 2 reaches a certain threshold value, that is, when the oil pressure is greater than the pressure applied by the first elastic member 33 on the first valve core 32, the first valve core 32 is lifted by the oil. Thus, the oil can flow through the pressure relief port 22, the pressure relief hole 311 and the pressure relief gap 23 in sequence and then be discharged to the outside of the first pipe 21. Since the oil pump provided by the embodiment of the present application adopts the above pressure relief structure in the pressure relief valve installation structure, the pressure relief efficiency can be improved, the pressure relief time can be shortened, and it is beneficial to reduce the potential safety hazard of collision.

[0090] Please combine Figure 1It is understood that the oil pump further includes a check valve 5; the check valve 5 includes a second valve core (not shown in the figure), the second valve core is arranged in the pump core 11 of the oil pump, and the second valve core is used to open or close the oil outlet 111.

[0091] Compared with the related art where the check valve 5 and the pump core 11 are connected through a connecting pipeline, the oil pump provided by the embodiment of the present application directly integrates the second valve core in the pump core 11, which can eliminate the oil pipe connecting the check valve 5 and the pump core 11, thereby further reducing the number of arranged oil pipes, saving the arrangement space inside the oil pump, making the structure of the oil pump more compact. At the same time, it is also beneficial to further reduce the production cost of the oil pump.

[0092] In the embodiment of the present application, the check valve 5 further includes a second elastic member (not shown in the figure). One end of the second elastic member is connected to the pump core 11, and the other end of the second elastic member is connected to the second valve core. The second elastic member has an elastic force for driving the second valve core to close the oil outlet 111. Specifically, the second elastic member can be a spring, and the second elastic member can be sleeved on the second valve core. The second elastic member can press the second valve core towards the pressure relief port 22, so that the second valve core blocks the oil outlet 111 under the action of the elastic force of the second elastic member. The check valve 5 with such a structure adopted in the embodiment of the present application is beneficial to improving the pressure maintaining effect. Even if the pipeline is damaged by external force or the pipeline is disconnected, the fuel outflow can be reduced, thereby reducing potential safety hazards.

[0093] The working principle of the oil pump provided by the embodiment of the present application is described below in conjunction with the accompanying drawings:

[0094] (1) The oil pump is powered on and operates. The pump core 11 rotates, and the fuel inside the oil storage cavity flows through the check valve 5 from the oil outlet 111 of the pump core 11 into the transfer pipe 2 under the action of the pump core 11. The outflowing fuel is divided into three paths inside the transfer pipe 2. The first path of fuel flows to the pressure relief valve 3, and can flow to the end cap 41 through the pressure relief port 22 of the first pipe 21 and the pressure relief hole 311 in sequence. Under the action of the conical tip 42 on the inner top wall of the end cap 41, the fuel is dispersed to weaken the momentum. At the same time, under the blocking action of the inner top wall of the end cap 41, the fuel evenly flows to the periphery of the pressure relief gap 23 along the radial direction of the end cap 41, and then is directly discharged into the cavity inside the fuel tank 91 from the port of the pressure relief gap 23 and directly enters the oil storage cavity inside the pump housing 12; the second path of fuel enters the return oil pipe 62, and then flows to the pressure regulating valve 8. The pressure regulating valve 8 can ensure that a certain pressure, such as 550 kPa ± 30 kPa, is maintained in the fuel supply pipe 61, and then is introduced into the diffraction pump 7. The diffraction pump 7 uses the siphon effect to absorb the fuel inside the fuel tank 91 and send the fuel into the oil storage cavity through the oil suction pipe 63 to ensure that there is enough fuel inside the oil storage cavity for the pump core 11 to use; the last path of fuel flows to the fuel supply pipe 61, and then is sent to the engine 92 by the fuel supply pipe 61 to ensure the normal fuel supply of the engine 92.

[0095] (2)The fuel supply pipe 61 is depressurized. There is a certain initial oil pressure inside the fuel supply pipe 61. For example, 550 kPa ± 30 kPa. The pressure relief valve 3 can quickly depressurize through the pressure relief hole 311, so that the oil pressure inside the fuel supply pipe 61 is reduced to 350 kPa, and then slowly reduced from 350 kPa. Thereby, it can ensure that no bubbles are generated inside the fuel supply pipe 61, shorten the pressure relief time, and reduce the potential safety hazard of collision.

[0096] (3)The check valve 5 maintains pressure. The check valve 5 has a certain opening pressure. For example, 50 kPa. When the pressure inside the fuel tank 91 is relatively high (the maximum pressure is, for example, 35 kPa), the check valve 5 can effectively ensure that the fuel inside the fuel tank 91 is not squeezed into the fuel supply pipe 61. Even if the pipeline is damaged by external force or disconnected, the fuel outflow can be greatly reduced, thereby reducing the safety hazard.

[0097] This application also provides a fuel system, including a fuel tank 91 and a fuel pump. The fuel pump is installed inside the fuel tank 91. The fuel pump is the fuel pump in all the above embodiments. Therefore, the fuel system including this fuel pump has the beneficial effects of the fuel pumps in all the above embodiments, which will not be elaborated here.

[0098] This application also provides a vehicle, including a fuel system. The fuel system is the fuel system in all the above embodiments. Therefore, the vehicle including this fuel system has the beneficial effects of the fuel systems in all the above embodiments, which will not be elaborated here.

[0099] In this article, specific examples are used to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the device of this application and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An oil pump, comprising an oil storage chamber and an oil outlet (111), characterized in that: The oil pump comprises a diffraction pump (7) and a pressure regulating valve (8); The oil outlet (111) is connected to the inlet of the pressure regulating valve (8), the outlet of the pressure regulating valve (8) is connected to the inlet of the diffraction pump (7), and the outlet of the diffraction pump (7) is connected to the oil storage chamber; the diffraction pump (7) and / or the pressure regulating valve (8) are mounted on a pump housing (12) of the oil pump.

2. The oil pump according to claim 1, characterized in that: The oil pump further comprises a transfer pipe (2), a pressure relief valve (3), an oil supply pipe (61) and an oil return pipe (62); The transfer pipe (2) comprises a plurality of pipe sections that are interconnected, one of the pipe sections being connected to the oil outlet (111), and the remaining pipe sections being connected to the pressure relief valve (3), the inlet of the oil supply pipe (61), and the inlet of the oil return pipe (62), respectively; the outlet of the oil supply pipe (61) is connected to the engine (92), and the outlet of the oil return pipe (62) is connected to the pressure regulating valve (8).

3. The oil pump according to claim 2, characterized in that: The pressure regulating valve (8) has a first inlet (81) and a first outlet (82) which are openable at a preset pressure, and the diffraction pump (7) has an oil suction port (71), a second inlet (72) and a second outlet (73); The outlet of the oil return pipe (62) is in communication with the first inlet (81), the first outlet (82) is in communication with the second inlet (72), the second inlet (72) and the oil suction port (71) are both in communication with the second outlet (73), and the second outlet (73) is in communication with the oil storage chamber.

4. The oil pump according to claim 3, characterized in that: The oil pump further comprises an oil suction pipe (63); The second outlet (73) is connected to the oil storage chamber via the oil suction pipe (63); at least a portion of the oil return pipe (62) and the pump housing (12) of the oil pump are integrally formed, and / or at least a portion of the oil suction pipe (63) and the pump housing (12) of the oil pump are integrally formed.

5. The oil pump according to any one of claims 2 to 4, characterized in that: One of the pipe sections constitutes a first pipe (21), and the pressure relief valve (3) is arranged in the first pipe (21); The pressure relief valve (3) comprises a first valve seat (31) and a first valve core (32) arranged on the first valve seat (31); a pressure relief hole (311) is provided on the first valve seat (31); and the first valve core (32) is used to connect or cut off the oil outlet (111) and the pressure relief hole (311).

6. The oil pump according to claim 5, characterized in that: The oil pump further comprises a stopper (4); The stopper (4) is connected to the first tube (21); a pressure relief gap (23) is defined between the stopper (4) and the first tube (21); an inlet end of the pressure relief gap (23) is communicated with the pressure relief hole (311); an outlet end of the pressure relief gap (23) opens in the direction of the oil outlet (111); and the outlet end of the pressure relief gap (23) is directly communicated with a cavity inside the oil tank (91).

7. The oil pump according to claim 6, characterized in that: The stopper (4) comprises an end cap (41); The end cap (41) is sleeved on the first tube (21), the inner side wall of the end cap (41) and the outer side wall of the first tube (21) define the pressure relief gap (23), and the pressure relief hole (311) and the inner top wall of the end cap (41) are opposite to each other.

8. The oil pump according to claim 7, characterized in that: One of the end cap (41) and the first tube (21) is provided with a clamping groove (43), and the other is provided with a clamping block (211), and the clamping block (211) is clamped with the clamping groove (43).

9. The oil pump according to claim 7, characterized in that: The stopper (4) further comprises a cone tip (42); The cone tip (42) is arranged on the inner top wall of the end cap (41), and the tip of the cone tip (42) extends in the direction of the pressure relief hole (311).

10. The oil pump according to claim 9, characterized in that The pressure relief hole (311) penetrates the first valve seat (31) along the axial direction of the first tube (21), and the pressure relief hole (311) and the cone tip (42) are located on the same axis.

11. The oil pump according to claim 5, characterized in that: The pressure relief valve (3) further comprises a first elastic member (33); One end of the first elastic member (33) is connected to the first valve seat (31), and the other end of the first elastic member (33) is connected to the first valve core (32). The first tube (21) is provided with a pressure relief port (22), and the pressure relief port (22) is communicated with the oil outlet (111). The first elastic member (33) has an elastic force for driving the first valve core (32) to close the pressure relief port (22).

12. The oil pump according to any one of claims 1 to 4, characterized in that: The oil pump further comprises a check valve (5); The check valve (5) comprises a second valve core, the second valve core is arranged in a pump core (11) of the oil pump, the oil outlet (111) is connected to the pump core (11), and the second valve core is used to open or close the oil outlet (111).

13. A fuel system, characterized in that: comprising an oil tank (91) and an oil pump according to any one of claims 1 to 12; The oil pump is installed in the oil tank (91).

14. A vehicle, characterized in that: Includes the fuel system as claimed in claim 13.

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