External electric control fuel supply pump

Abstract

The utility model discloses an external electric control fuel supply pump which comprises a pump body, an end cover and a motor assembly arranged in the pump body, and a conveying channel is formed between the motor assembly and the pump body. The pump body is connected with a pump cover, and a rotor assembly connected with the motor assembly is arranged in the pump cover. A first connector communicated with the rotor assembly is arranged in the end cover, and a second connector is arranged on the side, away from the pump cover, of the pump body. A runner is arranged between the rotor assembly and the conveying channel for communication; a medium is conveyed through the first connector, the rotor assembly, the flow channel, the conveying channel and the second connector in sequence, and the medium cools the motor assembly in the conveying process. The medium conveying device is suitable for conveying conventional media and can convey corrosive media; in the large-flow medium conveying process, the motor assembly can be cooled at the same time, and the service life can be greatly prolonged.

Description

Technical Field

[0001] This application relates to the field of pump technology, and in particular to an externally mounted electronically controlled fuel supply pump. Background Technology

[0002] A pump is a mechanical device used to transport or pressurize fluids (liquids or gases), and is widely used in industry, agriculture, urban construction, energy, transportation, environmental protection and other fields. Pumps are generally divided into built-in pumps (such as those inside water tanks or oil tanks) that are submerged in the medium, and external pumps that are located outside the medium (such as those outside water tanks or oil tanks).

[0003] An electronic oil pump with announcement number CN 216741978 U introduces oil from the pump chamber into the motor by creating a high-pressure oil channel on the motor heat sink housing that connects the pump chamber and the shaft hole, with the shaft hole also connected to the motor interior. This allows oil to be introduced into the motor for oil cooling. Specifically, the oil flows from the high-pressure chamber through the high-pressure oil channel and then through the shaft hole into the motor interior for cooling, before returning to the low-pressure chamber through the low-pressure crescent-shaped chamber, repeating the cycle. However, when conveying water, methanol, or other corrosive media, directly introducing the oil into the motor can easily cause corrosion, leading to short circuits and damage, thus affecting the pump's service life. Furthermore, only a small portion of the medium can enter through the shaft hole, making it difficult to achieve high-flow-rate circulation and heat dissipation. The medium after heat exchange is also difficult to discharge in a timely manner, further impacting the heat dissipation effect. Utility Model Content

[0004] To address the shortcomings of the existing technology, this application provides an externally mounted, electrically controlled fuel supply pump that can cool the motor while simultaneously transporting corrosive media, thereby extending the pump's service life. The technical solution is as follows:

[0005] An externally mounted electronically controlled fuel supply pump includes a pump body and an end cover, as well as a motor assembly housed within the pump body, wherein a delivery channel is formed between the motor assembly and the pump body.

[0006] The pump body is provided with a pump cover connection, and the pump cover contains a rotor assembly that connects to the motor assembly;

[0007] The end cover is provided with a first interface that connects to the rotor assembly, and the pump body on the side away from the pump cover is provided with a second interface;

[0008] A flow channel connects the rotor assembly and the conveying channel;

[0009] The medium is conveyed sequentially through the first interface, the rotor assembly, the flow channel, the conveying channel, and the second interface, and the medium cools the motor assembly during the conveying process.

[0010] Preferably, the motor assembly comprises a heat dissipation shell and a driving shaft, and a driving component arranged in the heat dissipation shell, the driving shaft is connected with the rotor assembly, the driving component is used for driving the driving shaft to rotate, and the driving shaft is in sealed connection with the pump cover.

[0011] Preferably, the flow channel comprises a first connecting hole arranged on the pump cover, and a second connecting hole arranged on the motor assembly, and the pump cover and the motor assembly form a shunt cavity which communicates the first connecting hole and the second connecting hole.

[0012] Preferably, the pump cover is provided with a containing groove for placing the rotor assembly, the rotor assembly comprises a first rotor, and a second rotor arranged in the first rotor, and the second rotor divides the first rotor into a first pressure cavity and a second pressure cavity.

[0013] Preferably, the pump body comprises a first containing cavity and a second containing cavity which are arranged in a separated manner, the motor assembly is arranged in the first containing cavity, and the first containing cavity is circumferentially provided with a support portion for supporting the motor assembly.

[0014] Preferably, the motor assembly, the pump cover and the pump body are in sealed connection.

[0015] Preferably, the control circuit board is further arranged in the second containing cavity and electrically connected with the motor assembly.

[0016] Preferably, the wire passing channel for communicating the motor assembly and the control circuit board is further arranged, the wire passing channel is arranged on the heat dissipation shell and extends into the second containing cavity.

[0017] Preferably, the second connecting hole is circumferentially and uniformly arranged along an axis of the motor assembly.

[0018] Preferably, the wave spring member for positioning the motor assembly is further arranged.

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

[0020] The medium conveyed by the application will not enter the motor assembly, which is not only suitable for conveying conventional medium, but also can realize conveying of medium with corrosiveness, thereby improving the service life.

[0021] During the large-flow conveying of the medium, the motor assembly is cooled, the circulating speed of the medium in the conveying channel is high, the medium after heat exchange will not accumulate in the conveying channel, the motor assembly can be quickly cooled, and the cooling effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of the present application;

[0023] Figure 2 is a sectional view of the present application;

[0024] Figure 3 is a schematic view of the wire passage structure of the present application;

[0025] Figure 4 is a schematic view of the rotor assembly structure of the present application Figure 3 is a sectional view of the present application at A-A;

[0026] Figure 5 is a schematic view of the rotor assembly structure of the present application

[0027] in the figure:

[0028] 1. pump body, 100, first accommodating cavity, 200, second accommodating cavity;

[0029] 2. motor assembly, 21, heat dissipation shell, 22, motor stator, 23, motor rotor, 24, drive shaft;

[0030] 3. pump cover, 30, accommodating groove;

[0031] 4. end cover, 5, first interface, 6, second interface;

[0032] 7. rotor assembly, 71, first rotor, 72, second rotor, 710, first pressure cavity, 720, second pressure cavity;

[0033] 8. control circuit board, 9, flow channel, 90, shunt cavity, 91, first connecting hole, 911, liquid storage cavity, 912, through hole, 92, second connecting hole, 10, conveying passage, 11, first wire passage, 12, second wire passage, 13, wave spring piece. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings of the present application. Obviously, the embodiments described in the present application are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] For further description of the present application, refer to Figures 1 to 5

[0036] in combination with Figure 1 and Figure 2 , the external electric control fuel supply pump comprises a pump body 1 and an end cover 4, and a motor assembly 2 arranged in the pump body 1, and a conveying passage 10 is formed between the motor assembly 2 and the pump body 1.​

[0037] The pump body 1 is provided with a pump cover 3 connection, the rotor assembly 7 is arranged in the pump cover 3;

[0038] The first interface 5 is arranged in the end cover 4 and communicated with the rotor assembly 7, and the second interface 6 is arranged on the pump body 1 away from the pump cover 3;

[0039] The flow channel 9 is arranged between the rotor assembly 7 and the conveying channel 10;

[0040] The medium is conveyed through the first interface 5, the rotor assembly 7, the flow channel 9, the conveying channel 10 and the second interface 6 in sequence, and the motor assembly 2 is cooled during the conveying process. In the embodiment, the medium is alcohol; of course, it can also be water or fuel oil and the like.

[0041] In combination Figure 2 , the motor assembly 2 includes a heat dissipation shell 21, a driving shaft 24, and a driving component arranged in the heat dissipation shell 21, the driving shaft 24 is connected with the rotor assembly 7, and the driving component is used for driving the driving shaft 24 to rotate; the driving shaft 24 and the pump cover 3 can be connected through an oil seal to avoid the medium entering the motor assembly. The driving component includes a motor stator 22 and a motor rotor 23 arranged on the driving shaft 24; the heat dissipation shell 21 can be made of a material with good thermal conductivity.

[0042] Further comprising a wave spring member 13, the wave spring member 13 is used for positioning the motor assembly. The driving shaft, the heat dissipation shell and the pump cover can be rotatably connected through a bearing; the wave spring member 13 abuts against the pump cover and the bearing, and provides an axial force through elastic deformation of the wave spring member, eliminates the axial movement gap of the motor rotor, can buffer and reduce vibration, noise and wear caused by the gap of the motor assembly, and improves the operation precision.

[0043] The heat generated by the driving component is exchanged with the medium in the conveying channel 10 through the heat dissipation shell 21, so that the medium does not directly contact the driving component, therefore, not only conventional medium (such as fuel oil and the like) can be conveyed, but also medium with corrosive property (such as methanol and the like) can be conveyed, and damage caused by corrosion of the medium to the driving component is avoided; since the heat dissipation shell 21 is arranged in the conveying channel 10 in which the medium flows, the medium is conveyed out after being in contact with the heat dissipation shell 21 for heat exchange during the conveying process, since the flow of the medium in the conveying channel 10 is large and the circulation speed is fast, the driving component can be rapidly cooled.

[0044] In an embodiment not shown, a heat-conducting sheet can be installed on the heat-dissipating shell 21 to further improve the heat-dissipating effect on the driving components.

[0045] In combination Figure 2 In this embodiment, the flow channel 9 includes a first connecting hole 91 formed on the pump cover 3, and a plurality of second connecting holes 92 formed on the motor assembly 2. A shunt cavity 90 is formed between the pump cover 3 and the motor assembly 2, and is used to connect the first connecting hole 91 and the second connecting holes 92. When the medium enters the shunt cavity 90, the medium can be distributed to each of the second connecting holes 92 through the shunt cavity 90, and then flows into the conveying channel 10 through each of the second connecting holes 92. Figure 4 In this embodiment, the second connecting holes 92 are evenly distributed circumferentially on the heat-dissipating shell 21, so that the medium can flow into the conveying channel 10 uniformly.

[0046] In combination Figure 4 Specifically, the first connecting hole 91 includes a liquid storage cavity 911 and at least one through hole 912, which are in communication with each other. The liquid storage cavity 911 is connected to the rotor assembly 7, and the through hole 912 is used to connect the liquid storage cavity 911 and the shunt cavity 90.

[0047] In combination Figure 5 The pump cover 3 is provided with a receiving groove 30 for placing the rotor assembly 7. The rotor assembly 7 includes a first rotor 71 and a second rotor 72 arranged in the first rotor 71. The second rotor 72 is connected to the driving shaft 24. The second rotor 72 divides the first rotor 71 into a first pressure cavity 710 and a second pressure cavity 720.

[0048] It can be understood that when the rotor assembly 7 rotates clockwise, the first pressure cavity 710 is a low-pressure cavity, and the second pressure cavity 720 is a high-pressure cavity.

[0049] When the rotor assembly 7 rotates counterclockwise, the first pressure cavity 710 is a high-pressure cavity, and the second pressure cavity 720 is a low-pressure cavity. The rotor assembly 7 is used to convey the medium from the low-pressure cavity to the high-pressure cavity.

[0050] In this embodiment, the flow channel 9 is connected to the second pressure cavity 720, the first interface 5 is connected to the first pressure cavity 710, and the rotor assembly 7 rotates clockwise. In an embodiment not shown, the flow channel 9 can also be connected to the second pressure cavity 720, the first interface 5 is connected to the first pressure cavity 710, and the rotor assembly 7 can rotate counterclockwise.

[0051] In combination Figure 2When the rotor assembly 7 rotates, the medium is sucked into the first pressure cavity 710 through the first interface 5, transported into the second pressure cavity 720 through the rotation of the rotor assembly 7, and then discharged through the second interface 6 after sequentially flowing through the flow channel 9 and the delivery channel 10.

[0052] Of course, according to the rotation direction of the rotor assembly 7, the medium can also be sucked through the second interface 6, sequentially enter the second pressure cavity 720 through the delivery channel 10 and the flow channel 9, and then be discharged through the first interface 5 after being transported into the first pressure cavity 710 by the rotation of the rotor assembly 7.

[0053] In some embodiments, the second interface 6 can also be arranged on the pump cover.

[0054] In combination Figure 3 In this embodiment, the pump body 1 includes a first accommodating cavity 100 and a second accommodating cavity 200 arranged in a partitioned manner, the motor assembly 2 is arranged in the first accommodating cavity 100, and the control circuit board 8 is arranged in the second accommodating cavity 200; the control circuit board 8 is electrically connected with the motor assembly 2; in combination Figure 4 The first accommodating cavity 100 in the pump body 1 is circumferentially distributed with a support portion 13 extending along the axis direction of the support portion 13, which is used for supporting the motor assembly and avoiding vibration of the motor assembly 2 during work, thereby improving the overall work stability.

[0055] In combination Figure 3 In order to facilitate the electrical connection between the control circuit board 8 and the motor assembly 2, a wire passing channel is further included, which includes a first wire passing channel 11 arranged on the heat dissipation shell 21 and a second wire passing channel 12 arranged on the pump body 1, and the heat dissipation shell 21 is coaxially arranged through the first wire passing channel 11 and the second wire passing channel 12, which is used for electrically connecting the driving component and the control circuit board 8 through the wire. In some embodiments, a filling component can be arranged in the wire passing channel to separate the inside of the heat dissipation shell 21 from the second accommodating cavity, and the wire passes through the filling component to electrically connect the driving component, the circuit board and the external power supply.

[0056] In order to avoid leakage of the medium in the delivery channel 10, the heat dissipation shell 21, the pump cover 3 and the pump body 1 are sealingly connected. The pump cover 3, the motor assembly 2 and the pump body 1 are all provided with sealing components for sealing to avoid leakage of the medium; the sealing component can be a sealing ring.

Claims

1. An externally mounted, electronically controlled fuel supply pump, characterized in that: It includes a pump body and an end cap, as well as a motor assembly disposed within the pump body, wherein the motor assembly and the pump body form a conveying channel; The pump body is provided with a pump cover connection, and the pump cover contains a rotor assembly that connects to the motor assembly; The end cover is provided with a first interface that connects to the rotor assembly, and the pump body on the side away from the pump cover is provided with a second interface; A flow channel connects the rotor assembly and the conveying channel; The medium is conveyed sequentially through the first interface, the rotor assembly, the flow channel, the conveying channel, and the second interface, and the medium cools the motor assembly during the conveying process.

2. The external electronically controlled fuel supply pump according to claim 1, characterized in that: The motor assembly includes a heat sink and a drive shaft, as well as a drive component disposed within the heat sink. The drive shaft is connected to the rotor assembly, and the drive component is used to drive the drive shaft to rotate. The drive shaft is sealed to the pump cover.

3. The external electronically controlled fuel supply pump according to claim 1, characterized in that: The flow channel includes a first connection hole on the pump cover and a second connection hole on the motor assembly, and a flow divider cavity is formed between the pump cover and the motor assembly, connecting the first connection hole and the second connection hole.

4. The external electronically controlled fuel supply pump according to claim 1, characterized in that: The pump cover is provided with a receiving groove for placing the rotor assembly. The rotor assembly includes a first rotor and a second rotor disposed inside the first rotor. The second rotor divides the first rotor into a first pressure chamber and a second pressure chamber.

5. The externally mounted electronically controlled fuel supply pump according to claim 2, characterized in that: The pump body includes a first receiving cavity and a second receiving cavity separated by a partition. The motor assembly is disposed in the first receiving cavity. A support portion is distributed circumferentially in the first receiving cavity, and the support portion is used to support the motor assembly.

6. The external electronically controlled fuel supply pump according to claim 1, characterized in that: The motor assembly, the pump cover, and the pump body are sealed together.

7. The external electronically controlled fuel supply pump according to claim 5, characterized in that: It also includes a control circuit board, which is disposed in the second receiving cavity and electrically connected to the motor assembly.

8. The externally mounted electronically controlled fuel supply pump according to claim 7, characterized in that: It also includes a wiring channel for connecting the motor assembly and the control circuit board, the heat sink being provided with the wiring channel, and the wiring channel extending into the second receiving cavity.

9. The external electronically controlled fuel supply pump according to claim 3, characterized in that: The second connecting holes are evenly distributed circumferentially along the axis of the motor assembly itself.

10. The externally mounted electronically controlled fuel supply pump according to claim 1, characterized in that: It also includes a wave spring, which is used to position the motor assembly.

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