Fuel liquid conveying device
By designing a fuel delivery device with an internal gear pump, motor isolation cover, and pressure relief valve structure, the corrosive and toxic effects of methanol fuel on engine components were solved, achieving safe fuel delivery and pipeline pressure management, and ensuring the safe and reliable operation of the engine.
Patent Information
- Application Number
- CN202520123415.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-20
AI Technical Summary
The corrosive and toxic nature of methanol fuel leads to corrosion problems in engine parts, and increased pipeline pressure may cause leaks, affecting engine safety and reliability.
A fuel liquid delivery device was designed, which adopts an internal gear pump, a motor isolation cover and a pressure limiting valve structure to ensure safe and reliable fuel liquid delivery. It includes a motor stator assembly isolated from the fuel liquid, a fuel liquid return pipeline and a pressure limiting valve structure to prevent pipeline pressure overload.
It effectively prevents the fuel from corroding the motor components, ensuring the safe and reliable operation of the engine, and returns the fuel to the tank when the engine is stopped, avoiding pipeline leaks and improving the safety and reliability of the engine.
Smart Images
Figure CN223594320U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of engine fuel supply for vehicle, especially relates to a fuel delivery device.
BACKGROUND
[0002] Due to the economic characteristics of methanol fuel, at present, all major domestic host factories have begun to study methanol engine, especially Geely, which has been studied for many years and has a vehicle model for batch use, and the supporting market of parts will also expand the application of methanol electric pump products due to the application of methanol engine, and the subsequent development prospect is good. As an important core part of methanol engine, methanol fuel medium delivery device will promote the use of methanol engine and even methanol fuel, and realize the product strategy of multiple energy sources under the requirements of reliability and durability.
[0003] Due to the corrosion of methanol itself, the corrosion problem of product parts under methanol medium needs to be solved, so as to solve the problem of function loss caused by corrosion. And methanol liquid has certain toxicity, in order to ensure the safety under the shutdown state, methanol fuel delivery device needs a special channel to return the methanol delivered by methanol fuel delivery device to the fuel tank, so as to ensure that the pipeline does not contain methanol liquid. In addition, the fuel delivered will cause the pressure in the pipeline to rise continuously due to the excessive resistance of the rear end, and then cause the pipeline to leak. In order to avoid pipeline leakage, the pipeline pressure needs to be released.
[0004] Therefore, it is necessary to provide an improved technical scheme to solve the above problems.
UTILITARY MODEL CONTENT
[0005] One of the purposes of the utility model is to provide a fuel delivery device, which can eliminate the particularity, corrosion and toxicity of fuel (such as methanol fuel), complete the transportation of fuel, and ensure that the engine works safely, reliably and effectively.
[0006] According to one aspect of the utility model, the utility model provides a kind of fuel liquid conveying device, it includes: motor assembly, it includes motor shell, motor stator subassembly, motor rotor subassembly and motor shaft, the motor stator subassembly, motor rotor subassembly and motor shaft are housed in the cavity defined in the motor shell;The motor stator subassembly is set to the periphery of the motor rotor subassembly;The motor rotor subassembly is set on the motor shaft, and the motor shaft does not rotate;Joint assembly, it includes joint seat, liquid inlet joint sealedly installed on the joint seat, liquid outlet joint sealedly installed on the joint seat, pressure-limiting valve subassembly sealedly installed on the joint seat, import end and liquid inlet passage are formed in the liquid inlet joint, liquid outlet and liquid outlet passage are formed in the liquid outlet joint, liquid inlet cavity, liquid outlet cavity and backflow cavity are formed in the joint seat, the pressure-limiting valve subassembly includes pressure-limiting valve passage and valve core, backflow groove is arranged in the valve core, wherein the liquid inlet passage of the liquid inlet joint is communicated with the liquid inlet cavity on the joint seat;The liquid outlet cavity of the joint seat is communicated with the liquid outlet passage of the liquid outlet joint;The backflow cavity is communicated with the liquid outlet passage of the liquid outlet joint and the liquid outlet cavity of the joint seat;The pressure-limiting valve passage is communicated with the backflow cavity;The valve core opens or shuts off the pressure-limiting valve passage based on the pressure of the fuel liquid;The backflow groove communicates the pressure-limiting valve passage and backflow cavity;Liquid pump component, it is sealedly installed on the joint seat and is set on the motor shaft, the liquid pump component includes fuel liquid suction port and fuel liquid discharge port, the liquid inlet cavity of the joint seat is communicated with the fuel liquid suction port of the liquid pump component, the fuel liquid discharge port of the liquid pump component is communicated with the liquid outlet cavity of the joint seat;When working, the motor rotor subassembly rotates to drive the liquid pump component, so as to drive fuel liquid to enter the liquid pump component in sequence through the import end, liquid inlet passage, liquid inlet cavity and fuel liquid suction port, and then the fuel liquid flows out in sequence through the fuel liquid discharge port, liquid outlet cavity, liquid outlet passage and liquid outlet port;After engine shutdown, the fuel liquid stored will flow out in sequence through the liquid outlet port, liquid outlet passage, backflow cavity, backflow groove and pressure-limiting valve passage.
[0007] Compared with prior art, the utility model can eliminate the particularity, corrosiveness and toxicity of fuel liquid (for example, methanol fuel), to complete the transportation of fuel liquid, and ensure that the engine works safely, reliably and effectively.
DRAWING DESCRIPTION
[0008] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be needed to use the drawings in the embodiment description briefly introduced, obviously, the following description in the drawings is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creativity labor intensity, other drawings can also be obtained according to these drawings. Wherein:
[0009] Figure 1This is a perspective view of the fuel liquid conveying device in one embodiment of the present invention;
[0010] Figure 2 In one embodiment of this utility model, as Figure 1 A longitudinal cross-sectional schematic diagram of the fuel-liquid transport device shown;
[0011] Figure 3 As shown, this is one embodiment of the present invention. Figure 2 A partially enlarged schematic diagram of the fuel-liquid transport device shown;
[0012] Figure 4a In one embodiment of this utility model, as shown Figure 2 A longitudinal cross-sectional view of the pressure relief valve assembly shown.
[0013] Figure 4b In one embodiment of this utility model, as Figure 4a The diagram shows the structure of the valve core.
[0014] Figure 5a In one embodiment of this utility model, as Figure 2 The diagram shows a top view of the pump component without its top cover.
[0015] Figure 5b In one embodiment of this utility model, as Figure 2 A top view of the liquid pump components shown;
[0016] Figure 5c In one embodiment of this utility model, as Figure 2 A longitudinal cross-sectional schematic diagram of the liquid pump component shown;
[0017] Figure 6a In one embodiment of this utility model, as shown Figure 2 Another enlarged schematic diagram of the fuel-liquid transport device shown;
[0018] Figure 6b In one embodiment of this utility model, as shown Figure 2 A schematic longitudinal cross-sectional view of the motor rotor assembly shown.
[0019] Figure 7a In one embodiment of this utility model, as Figure 2 A top view of the motor rotor assembly shown;
[0020] Figure 7b In one embodiment of this utility model, as Figure 2 A bottom view of the liquid pump components shown;
[0021] Figure 7c In one embodiment of this utility model, as Figure 2The diagram shows the relative positions of the rotor, coupling, and motor rotor assembly inside the oil pump.
[0022] Figure 8a In one embodiment of this utility model, as shown Figure 2 The diagram shows the operational route of the fuel-liquid conveying device during operation.
[0023] Figure 8b In one embodiment of this utility model, as shown Figure 2 The diagram shows the fuel return path of the fuel delivery system after the engine stops.
[0024] Figure 8c In one embodiment of this utility model, as shown Figure 2 The diagram shows the fuel delivery circuit of the fuel delivery device when the pressure relief valve assembly is depressurized.
Detailed Implementation Methods
[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0026] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Unless otherwise specified, the terms coupling, connection, linking, and interconnection used herein to indicate electrical connection mean direct or indirect connection. For example, A being connected to B includes both a direct electrical connection between A and B and a connection between A and B via electrical components or circuits.
[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "back", "positive", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] Please refer to Figure 1 The image shown is a perspective view of a fuel-liquid conveying device according to one embodiment of the present invention; please refer to... Figure 2 As shown, this is one embodiment of the present invention. Figure 1 The diagram shows a longitudinal cross-sectional view of the fuel-liquid transport device. Figure 1 and Figure 2The fuel delivery device is suitable for delivering special fuel liquid with corrosiveness and toxicity, especially for delivering fuel liquid containing methanol. Figure 1 and Figure 2 The fuel delivery device comprises a joint assembly 1, a liquid pump part 2, a motor assembly 3 and a controller assembly 4.
[0029] The motor assembly 3 comprises a motor shell 31, a motor stator assembly 32, a motor rotor assembly 33 and a motor shaft 71. The motor stator assembly 32, the motor rotor assembly 33 and the motor shaft 71 are accommodated in a cavity defined by the motor shell 31. The motor stator assembly 32 is arranged at the periphery of the motor rotor assembly 33. The motor rotor assembly 33 is sleeved on the motor shaft 71, and the motor shaft 71 does not rotate (or is fixed).
[0030] The controller assembly 4 is electrically connected with the motor stator assembly 32. The controller assembly 4 inputs a voltage signal to the motor stator assembly 32, so as to drive the motor rotor assembly 33 to rotate around a center axis.
[0031] The joint assembly 1 comprises a joint base 14, a liquid inlet joint 13 sealedly mounted on the joint base 14, a liquid outlet joint 11 sealedly mounted on the joint base 14 and a pressure limiting valve assembly 15 sealedly mounted on the joint base 14.
[0032] In Figure 1 In the specific embodiment, the liquid inlet joint 13 is sealedly and threadedly connected with the joint base 14 through a first sealing ring (for example, an O-ring 12). The liquid outlet joint 11 is sealedly and threadedly connected with the joint base 14 through a second sealing ring (for example, an O-ring 12). The pressure limiting valve assembly 15 is sealedly and threadedly connected with the joint base 14 through a third sealing ring 16.
[0033] Please refer to Figure 3 As shown in Figure 2 A partial enlarged view of the fuel delivery device in one embodiment of the utility model. Figure 3As shown, the inlet joint 13 is formed with an inlet end 13a and an inlet passage 13b, the outlet joint 11 is formed with an outlet opening 11a and an outlet passage 11b, the joint base 14 is formed with an inlet cavity 14a, an outlet cavity 14b and a return cavity 14c, and the pressure limiting valve assembly 15 includes a pressure limiting valve passage 156 and a valve core 154, and the valve core 154 is provided with a return groove 154a. The inlet passage 13b of the inlet joint 13 is in communication with the inlet cavity 14a of the joint base 14; the outlet cavity 14b of the joint base 14 is in communication with the outlet passage 11b of the outlet joint 11; the return cavity 14c is in communication with the outlet passage 11b of the outlet joint 11 and the outlet cavity 14b of the joint base 14; the pressure limiting valve passage 156 is in communication with the return cavity 14c, the valve core 154 opens or shuts off the pressure limiting valve passage 156 based on the pressure of the fuel, and the return groove 154a is in communication with the pressure limiting valve passage 156 and the return cavity 14c.
[0034] In Figure 2 and Figure 3 In the embodiment shown, the liquid pump component 2 is sealingly mounted on the joint base 14 and sleeved on the motor shaft 71, the liquid pump component 2 includes a fuel suction port 28a and a fuel discharge port 28b, the inlet cavity 14a of the joint base 14 is in communication with the fuel suction port 28a of the liquid pump component 2, and the fuel discharge port 28b of the liquid pump component 2 is in communication with the outlet cavity 14b of the joint base 14.
[0035] Please refer to Figure 4a As shown in the longitudinal sectional view of the pressure limiting valve assembly in one embodiment of the utility model. Figure 2 As shown in the longitudinal sectional view of the pressure limiting valve assembly in one embodiment of the utility model. Figure 4aAs shown, the pressure limiting valve assembly 15 comprises, in addition to the pressure limiting valve passage 156 and the valve core 154, a pressure limiting valve joint body 151, a pressure limiting valve spring 152, a valve core guide sleeve 153 and a valve seat 155. The pressure limiting valve passage 156 is formed in the pressure limiting valve joint body 151, and comprises a pressure limiting valve port 156a at one end of the pressure limiting valve joint body 151, and a valve core mounting cavity 156b at the other end of the pressure limiting valve joint body 151, wherein the first port of the valve core mounting cavity 156b is in communication with the pressure limiting valve port 156a, and the second port thereof is in communication with the return cavity 14c of the joint seat 14. The valve core guide sleeve 153 is assembled in the valve core mounting cavity 156b, and the valve seat 155 is assembled in the valve core mounting cavity 156b outside the valve core guide sleeve 153, and the valve seat 155 is located at the second port of the valve core mounting cavity 156b (which is in communication with the return cavity 14c of the joint seat 14). The pressure limiting valve spring 152 and the valve core 154 are assembled in the valve core guide sleeve 153, and one end of the pressure limiting valve spring 152 abuts against the first port of the valve core mounting cavity 156b, and the other end thereof presses the valve core 154 against the valve seat 155, so that the valve core 154 covers the second port of the valve core mounting cavity 156b, thereby shutting off the pressure limiting valve passage 156. When the pressure of the fuel is greater than a predetermined value, the pressure generated by the fuel drives the valve core 154 to overcome the force exerted on it by the pressure limiting valve spring 152, so that the valve core 154 is separated from the valve seat 155 along the valve core guide sleeve 153, thereby opening the pressure limiting valve passage 156, and forming the pressure relief function of the product.
[0036] Please refer to Figure 4b As shown in the embodiment of the present application, Figure 4a As shown in the structure diagram of the valve core, Figure 4b As shown, the return groove 154a is provided in the valve core 154, and the return groove 154a is a spiral groove structure provided on the end face of the valve core 154, and the return groove 154a is in communication with the return cavity 14c of the joint seat 14 and the valve core mounting cavity 156b (or the pressure limiting valve passage 156). After the engine is stopped, the fuel can be slowly leaked to return alcohol.
[0037] Please refer to Figure 5a As shown in the embodiment of the present application, Figure 2 As shown in the top view of the liquid pump component without the upper cover; please refer to Figure 5b As shown in the embodiment of the present application, Figure 2 As shown in the top view of the liquid pump component; please refer to Figure 5c As shown in the embodiment of the present application, Figure 2 As shown in the longitudinal sectional view of the liquid pump component. Figure 5a 、 Figure 5b and Figure 5cThe shown liquid pump component is an internal gear pump, the liquid pump component 2 comprises, from outside to inside, an oil pump stator 22, a lubricating bushing 23, an oil pump outer rotor 24, an oil pump inner rotor 25 and a graphite bearing 26, and an oil pump lower cover 21 and an oil pump upper cover 28 covering the liquid pump component 2 as a whole. The graphite bearing 26 is sleeved on the motor shaft 71, the motor rotor assembly 33 drives the oil pump inner rotor 25 to rotate in the oil pump outer rotor 24 around the graphite bearing 26, and the oil pump upper cover 28 abuts against the joint seat 14. In a specific embodiment, the liquid pump component 2 is connected with the joint seat 14 by using screws through screw holes arranged above. The graphite bearing 26 rotates around the motor shaft 71 to lubricate the motor shaft 71 and reduce abrasion.
[0038] In Figure 5a , Figure 5b and Figure 5c the shown embodiment, the number of inner teeth of the oil pump outer rotor 24 is more than the number of outer teeth of the oil pump inner rotor 25; the inner teeth of the oil pump outer rotor 24 are engaged with the outer teeth of the oil pump inner rotor 25, and the inner teeth of the oil pump outer rotor 24 and the outer teeth of the oil pump inner rotor 25 form a rotor fuel suction area 24a and a rotor fuel discharge area 24b; the oil pump upper cover 28 is formed with a fuel suction inlet 28a and a fuel discharge outlet 28b, wherein the fuel suction inlet 28a communicates with the rotor fuel suction area 24a, and the fuel discharge outlet 28b communicates with the rotor fuel discharge area 24b.
[0039] Specifically, as shown in Figure 5a (no oil pump upper cover 28), the oil pump inner rotor 25 rotates in the counterclockwise direction shown in the view, and along the central axis, the oil pump inner rotor 25 forms the left rotor fuel suction area 24a and the right rotor fuel discharge area 24b with the oil pump outer rotor 24; in combination with Figure 5b , the oil pump upper cover 28 is formed with the left fuel suction inlet 28a and the right fuel discharge outlet 28b; during the rotation of the oil pump inner rotor 25, fuel enters the rotor fuel suction area 24a from the fuel suction inlet 28a to complete the fuel suction function; when the oil pump inner rotor 25 continues to rotate, fuel continues to be transported to the rotor fuel discharge area 24b and discharged from the rotor fuel discharge area 24b to the fuel discharge outlet 28b to complete the fuel discharge function, thus completing a fuel suction and discharge process.
[0040] Please refer to Figure 6a , which is another partial enlarged view of the fuel conveying device shown in Figure 2 in an embodiment of the utility model. As shown in Figure 6aAs shown, the motor assembly 3 further comprises a motor isolation cover 5, which integrally covers the motor rotor assembly 33 and integrally isolates the motor stator assembly 32. Specifically, the motor isolation cover 5 comprises a connecting structure 5a, a supporting surface 5b and a cover body 5c connected in sequence, wherein the connecting structure 5a is used to be sealingly connected with the joint base 14 through a sealing ring (for example, an O-ring); the supporting surface 5b is supported between the joint base 14 and the motor housing 31 to prevent the motor isolation cover 5 from moving up and down; and the cover body 5c integrally covers the motor rotor assembly 33. In this way, the motor stator assembly 32 is completely isolated from the fuel delivery path, and the risk of the material of the motor stator assembly 32 not being resistant to corrosion and the special fuel being toxic is effectively avoided.
[0041] In Figure 2 and Figure 6a In the embodiment shown, the upper end 71b of the motor shaft 71 is interference-connected with the mounting hole 14d of the joint base 14 through the liquid pump component 2; the lower end 71a of the motor shaft 71 passes through the motor rotor assembly 33 and is located in the motor shaft sleeve 72; the motor shaft sleeve 72 is located in the motor isolation cover 5 and between the bottom of the motor isolation cover 5 and the motor rotor assembly 33; the lower end 71a of the motor shaft 71 is provided with a mounting groove (not labeled), in which a circlip 74 is mounted, and a gasket 73 is placed at the upper end of the circlip 74 (i.e., the end adjacent to the motor rotor assembly 33), so as to adjust the axial gap through the circlip 74 and the gasket 73. Wherein, the circlip 74 and the gasket 73 are used to fix the motor rotor assembly 33 and prevent it from moving up and down; the motor shaft sleeve 72 is mounted at the inner bottom of the motor isolation cover 5, so as to limit the swing of the motor shaft 71 and prevent the motor rotor assembly 33 from rubbing against the motor isolation cover 5.
[0042] Please refer to Figure 6b As shown in the longitudinal sectional view of the motor rotor assembly in one embodiment of the utility model as Figure 2 As shown in the longitudinal sectional view of the motor rotor assembly in one embodiment of the utility model as Figure 6bIn the shown embodiment, the motor rotor assembly 33 comprises a motor housing 331, a motor upper cover 332, magnetic sheets 333, magnetic steels 334, a bearing sleeve 335, a motor lower cover 336 and bearings 337, wherein the magnetic sheets 333 and the magnetic steels 334 constitute a motor rotor body (not labeled). The motor housing 331, the motor rotor body (e.g., the magnetic sheets 333 and the magnetic steels 334) and the bearing sleeve 335 are sequentially placed from outside to inside; the motor upper cover 332 covers the upper end surface of the motor rotor body (e.g., the magnetic sheets 333 and the magnetic steels 334), and the motor upper cover 332 is clamped between the motor housing 331 and the bearing sleeve 335; the motor lower cover 336 covers the lower end surface of the motor rotor body, and the motor lower cover 336 is clamped between the motor housing 331 and the bearing sleeve 335; the bearings 337 are respectively arranged at the upper and lower ends of the bearing sleeve 335; the motor shaft 71 passes through the bearing sleeve 335 and the bearings 337 at the upper and lower ends of the bearing sleeve 335, and the bearings 337 rotate around the motor shaft 71.
[0043] Since the magnetic steels 334 are not resistant to corrosion and have the risk of special fuel, the first laser welding structure 33a is formed between the motor housing 331 and the motor upper cover 332, the second laser welding structure 33b is formed between the motor upper cover 332 and the bearing sleeve 335, the fourth laser welding structure 33d is formed between the motor housing 331 and the motor lower cover 336, and the third laser welding structure 33c is formed between the motor lower cover 336 and the bearing sleeve 335, so that the sealing is achieved by laser welding, and it is ensured that the special fuel (e.g., the fuel containing methanol) cannot enter the inside of the motor rotor assembly 33, and the risk that the material of the motor rotor assembly 33 is not resistant to the special fuel (e.g., the fuel containing methanol) is effectively avoided.
[0044] Please continue to refer to Figure 2 as shown, Figure 2 as shown, Figure 7a as shown, in an embodiment of the utility model Figure 2 as shown, the top view of the motor rotor assembly; please refer to Figure 7b as shown, in an embodiment of the utility model Figure 2 as shown, the bottom view of the liquid pump component; please refer to Figure 7c as shown, in an embodiment of the utility model Figure 2 as shown, the relative position schematic view of the oil pump inner rotor, the shaft coupling and the motor rotor assembly. In Figure 7a , Figure 7b and Figure 7cIn the shown embodiment, a first mounting boss 332a is arranged on the motor upper cover 332 (or the side surface of the motor rotor assembly 33 adjacent to the coupling 6); a mounting hole 25a is arranged on the side surface of the oil pump inner rotor 25 adjacent to the coupling 6, and a mounting groove 6a matched with the first mounting boss 332a and a second mounting boss 6b matched with the mounting hole 25a are arranged on the coupling 6. Thus, when the motor rotor assembly 33 rotates to drive the coupling 6, the oil pump inner rotor 25 is driven to rotate, forming the working process of the product.
[0045] Please refer to Figure 8a As shown in the embodiment of the present application, Figure 2 The fuel liquid conveying device shown in the working fuel liquid conveying operation route schematic diagram. As shown in Figure 8a As shown in the working process, the fuel liquid enters the inlet end 13a of the liquid inlet connector 13 from the upstream, flows through the liquid inlet channel 13b, enters the liquid inlet cavity 14a of the connector seat 14, then enters the rotor fuel liquid suction area 24a through the fuel liquid suction port 28a, the oil pump inner rotor 25 continues to rotate, the fuel liquid continues to be transported to the rotor fuel liquid discharge area 24b, and is discharged from the rotor fuel liquid discharge area 24b to the fuel liquid discharge port 28b, and then enters the liquid outlet cavity 14b of the connector seat 14 and the liquid outlet channel 11b and the liquid outlet port 11a of the liquid outlet connector 11, thus completing the entire fuel liquid conveying process. That is, in the working process, the motor rotor assembly 33 rotates to drive the liquid pump component 2, so that the fuel liquid enters the liquid pump component 2 in sequence through the inlet end 13a, the liquid inlet channel 13b, the liquid inlet cavity 14a and the fuel liquid suction port 28a, and then the fuel liquid flows out in sequence through the fuel liquid discharge port 28b, the liquid outlet cavity 14b, the liquid outlet channel 11b and the liquid outlet port 11a.
[0046] Please refer to Figure 8b As shown in the embodiment of the present application, Figure 2 The fuel liquid conveying device shown in the working fuel liquid conveying operation route schematic diagram. As shown in Figure 8b As shown in the working process, the fuel liquid enters the inlet end 13a of the liquid inlet connector 13 from the upstream, flows through the liquid inlet channel 13b, enters the liquid inlet cavity 14a of the connector seat 14, then enters the rotor fuel liquid suction area 24a through the fuel liquid suction port 28a, the oil pump inner rotor 25 continues to rotate, the fuel liquid continues to be transported to the rotor fuel liquid discharge area 24b, and is discharged from the rotor fuel liquid discharge area 24b to the fuel liquid discharge port 28b, and then enters the liquid outlet cavity 14b of the connector seat 14 and the liquid outlet channel 11b and the liquid outlet port 11a of the liquid outlet connector 11, thus completing the entire fuel liquid conveying process. That is, in the working process, the motor rotor assembly 33 rotates to drive the liquid pump component 2, so that the fuel liquid enters the liquid pump component 2 in sequence through the inlet end 13a, the liquid inlet channel 13b, the liquid inlet cavity 14a and the fuel liquid suction port 28a, and then the fuel liquid flows out in sequence through the fuel liquid discharge port 28b, the liquid outlet cavity 14b, the liquid outlet channel 11b and the liquid outlet port 11a.
[0047] Please refer to Figure 8c As shown in the embodiment of the present application, Figure 2The shown fuel delivery device is a schematic diagram of the fuel delivery line when the pressure limiting valve assembly is relieved. As shown Figure 8c As shown, when relieved, the fuel enters the inlet end 13a of the inlet joint 13, flows through the inlet channel 13b, and then enters the inlet cavity 14a of the joint seat 14. Subsequently, the fuel enters the rotor fuel suction area 24a through the fuel suction port 28a. The rotor 25 in the oil pump continues to rotate, and the fuel continues to be transported to the rotor fuel discharge area 24b and discharged from the rotor fuel discharge area 24b to the fuel discharge port 28b. Subsequently, the fuel enters the outlet cavity 14b of the joint seat 14, the backflow cavity 14c of the joint seat 14, and then reaches the valve core 154. Due to the pipeline pressure, the valve core 154 is forced to open the pressure limiting valve spring 152, thereby opening the pressure limiting valve channel 156, and then the fuel enters the valve core installation cavity 156b and flows back to the oil tank from the pressure limiting valve port 156a.
[0048] In summary, the fuel delivery device provided by the utility model adopts the following technical solutions:
[0049] 1. The fuel delivery is realized by using the internal meshing gear pump 2.
[0050] 2. Since the silicon steel sheet is not resistant to fuel corrosion, the motor stator assembly 32 is isolated from the fuel as a whole by using the motor isolation cover 5, and the motor rotor assembly 33 adopts an external metal welding structure to wrap the silicon steel sheet (for example, the magnetic sheet 333 and the magnetic steel 334) inside the metal shell, thereby avoiding the corrosion of the fuel.
[0051] 3. The fuel delivery device is provided with a fuel backflow pipe, which can ensure that the fuel can flow back to the oil tank after shutdown.
[0052] 4. The fuel delivery device is provided with a pressure limiting valve structure, which can ensure that the fuel returns to the oil tank under a certain pipeline pressure, thereby avoiding continuous rise of the pipeline pressure and causing pipeline leakage.
[0053] Compared with the prior art, the utility model can eliminate the particularity, corrosiveness and toxicity of the fuel (for example, fuel containing methanol) to complete the transportation of the fuel and ensure that the engine works safely, reliably and effectively.
[0054] It should be pointed out that any modification made by those skilled in the art to the specific embodiments of the utility model does not deviate from the scope of the claims of the utility model. Accordingly, the scope of the claims of the utility model is not limited to the foregoing specific embodiments.
Claims
1. A fuel delivery apparatus characterized by comprising: It comprises: a motor assembly comprising a motor housing, a motor stator assembly, a motor rotor assembly and a motor shaft, the motor stator assembly, the motor rotor assembly and the motor shaft being accommodated in a cavity defined by the motor housing; the motor stator assembly being arranged at the periphery of the motor rotor assembly; the motor rotor assembly being sleeved on the motor shaft, and the motor shaft not rotating; a joint assembly comprising a joint base, a liquid inlet joint sealedly mounted on the joint base, a liquid outlet joint sealedly mounted on the joint base, and a pressure limiting valve assembly sealedly mounted on the joint base, the liquid inlet joint being formed with an inlet end and a liquid inlet channel, the liquid outlet joint being formed with a liquid outlet and a liquid outlet channel, the joint base being formed with a liquid inlet cavity, a liquid outlet cavity and a backflow cavity, the pressure limiting valve assembly comprising a pressure limiting valve channel and a valve core, a backflow groove being arranged in the valve core, wherein the liquid inlet channel of the liquid inlet joint is in communication with the liquid inlet cavity of the joint base; the liquid outlet cavity of the joint base is in communication with the liquid outlet channel of the liquid outlet joint; the backflow cavity is in communication with the liquid outlet channel of the liquid outlet joint and the liquid outlet cavity of the joint base; the pressure limiting valve channel is in communication with the backflow cavity; the valve core opens or closes the pressure limiting valve channel based on the pressure of the fuel liquid; the backflow groove communicates the pressure limiting valve channel and the backflow cavity; a liquid pump component sealedly mounted on the joint base and sleeved on the motor shaft, the liquid pump component comprising a fuel liquid suction port and a fuel liquid discharge port, the liquid inlet cavity of the joint base being in communication with the fuel liquid suction port of the liquid pump component, and the fuel liquid discharge port of the liquid pump component being in communication with the liquid outlet cavity of the joint base; in operation, the motor rotor assembly rotates to drive the liquid pump component, so that the fuel liquid sequentially passes through the inlet end, the liquid inlet channel, the liquid inlet cavity and the fuel liquid suction port into the liquid pump component, and then the fuel liquid sequentially passes through the fuel liquid discharge port, the liquid outlet cavity, the liquid outlet channel and the liquid outlet to flow out; after the engine is stopped, the stored fuel liquid sequentially passes through the liquid outlet, the liquid outlet channel, the backflow cavity, the backflow groove and the pressure limiting valve channel to flow out.
2. The liquid fuel delivery device of claim 1, wherein It further comprises a controller assembly, the controller assembly is electrically connected with the motor stator assembly, and the controller assembly inputs a voltage signal to the motor stator assembly, so that the motor rotor assembly can rotate around a center axis.
3. The fuel liquid conveying device according to claim 1, wherein the liquid inlet joint is sealingly and threadedly connected with the joint base through a first sealing ring and threads; the liquid outlet joint is sealingly and threadedly connected with the joint base through a second sealing ring and threads; the pressure limiting valve assembly is sealingly and threadedly connected with the joint base through a third sealing ring and threads.
4. The liquid fuel delivery device of claim 1, wherein It further comprises a controller assembly, the backflow groove is a spiral groove arranged on an end surface of the valve core; the fuel liquid is a fuel liquid containing methanol.
5. The liquid fuel delivery device of claim 1, wherein The pressure limiting valve assembly further comprises: a pressure limiting valve joint body, in which a pressure limiting valve passage is formed, the pressure limiting valve passage comprising a pressure limiting valve port at one end of the pressure limiting valve joint body and a valve core mounting cavity at the other end of the pressure limiting valve joint body, a first port of the valve core mounting cavity being in communication with the pressure limiting valve port and a second port of the valve core mounting cavity being in communication with a return flow cavity of the joint base; a valve core guide sleeve assembled in the valve core mounting cavity; a valve seat assembled in the valve core mounting cavity and outside the valve core guide sleeve, the valve seat being located at the second port of the valve core mounting cavity; a pressure limiting valve spring assembled with the valve core in the valve core guide sleeve, one end of the pressure limiting valve spring abutting against the first port of the valve core mounting cavity and the other end of the pressure limiting valve spring pressing the valve core against the valve seat so that the valve core covers the second port of the valve core mounting cavity, thereby shutting off the pressure limiting valve passage; when the pressure of the fuel is greater than a predetermined value, the pressure generated by the fuel drives the valve core to move away from the valve seat along the valve core guide sleeve, thereby opening the pressure limiting valve passage.
6. The fuel delivery device according to claim 1, wherein the fuel pump component comprises, from outside to inside, an oil pump stator, a lubricating bushing, an oil pump outer rotor, an oil pump inner rotor and a graphite bearing, and an oil pump lower cover and an oil pump upper cover covering the fuel pump component as a whole, the graphite bearing is sleeved on the motor shaft, the motor rotor assembly drives the oil pump inner rotor to rotate around the graphite bearing in the oil pump outer rotor, and the oil pump upper cover abuts against the joint base, the number of inner teeth of the oil pump outer rotor is greater than the number of outer teeth of the oil pump inner rotor, the inner teeth of the oil pump outer rotor are engaged with the outer teeth of the oil pump inner rotor, and the inner teeth of the oil pump outer rotor and the outer teeth of the oil pump inner rotor form a rotor fuel suction area and a rotor fuel discharge area, and the oil pump upper cover forms the fuel suction port and the fuel discharge port, wherein the fuel suction port is in communication with the rotor fuel suction area and the fuel discharge port is in communication with the rotor fuel discharge area.
7. The fuel delivery device according to claim 1, wherein the motor assembly further comprises a motor isolation cover, and the motor isolation cover integrally covers the motor rotor assembly and isolates the motor stator assembly.
8. The fuel delivery device according to claim 7, wherein the motor isolation cover comprises a connecting structure, a supporting surface and a cover body connected in sequence, the connecting structure is used for sealingly connecting with the joint base through a sealing ring, the supporting surface is supported between the joint base and a motor housing, and the cover body integrally covers the motor rotor assembly.
9. The fuel delivery device according to claim 8, wherein the upper end of the motor shaft is interference-connected with the mounting hole of the connecting base through the fuel pump component, the lower end of the motor shaft passes through the motor rotor assembly and is located in a motor shaft sleeve, the motor shaft sleeve is located in the motor isolation cover and between the bottom of the motor isolation cover and the motor rotor assembly. The lower end of the motor shaft is provided with a mounting groove, a snap spring is mounted in the mounting groove, and a gasket is placed at one end of the snap spring adjacent to the motor rotor assembly.
10. The liquid fuel delivery device of claim 1, wherein, The motor rotor assembly comprises a motor housing, a motor upper cover, a motor rotor body, a bearing sheath, a motor lower cover and a bearing, The motor housing, the motor rotor body and the bearing sheath are placed from outside to inside in sequence; the motor upper cover covers the upper end surface of the motor rotor body, and the motor upper cover is clamped between the motor housing and the bearing sheath; the motor lower cover covers the lower end surface of the motor rotor body, and the motor lower cover is clamped between the motor housing and the bearing sheath; the bearings are respectively arranged at the upper and lower ends of the bearing sheath; the motor shaft passes through the bearing sheath and the bearings at the upper and lower ends of the bearing sheath; the bearings rotate around the motor shaft; The first laser welding structure is formed between the motor housing and the motor upper cover, the second laser welding structure is formed between the motor upper cover and the bearing sheath, the fourth laser welding structure is formed between the motor housing and the motor lower cover, and the third laser welding structure is formed between the motor lower cover and the bearing sheath.
11. The liquid fuel delivery device of claim 6, wherein It also comprises a shaft coupling, which is arranged between the liquid pump component and the motor rotor assembly, A first mounting boss is arranged on the side surface of the motor rotor assembly adjacent to the shaft coupling; A mounting hole is arranged on the side surface of the oil pump inner rotor adjacent to the shaft coupling; A mounting groove matched with the first mounting boss and a second mounting boss matched with the mounting hole are arranged on the shaft coupling; When the motor rotor assembly rotates, the shaft coupling drives the oil pump inner rotor to rotate.