Fuel gear pump

Abstract

The utility model discloses a fuel gear pump relates to engine technical field, including motor, electric control box, pump head, and the motor and electric control box are connected heat conduction box and the three are attached, and heat conduction box is connected with pump head through fuel delivery pipe intercommunication, utilizes fuel export motor and electric control box operating heat. Motor is away from heat conduction box end installation cover cylinder, and many components are fixed through the pull bolt series connection, motor drive end is equipped with outer drive magnet, and its inside driven magnet is connected with pump head driving helical gear, realizes magnetic power transmission, and cover cylinder carries out safety protection to rotating magnet. The driving helical gear and driven helical gear in pump head are engaged, and when rotating, make the cavity form negative pressure, and fuel is convenient through the delivery pipe and enters. The device does not need additional heat dissipation component, and the structure is simple, and the heat dissipation is high efficiency, guarantees fuel delivery stability, prolongs equipment life.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a fuel gear pump. Background Technology

[0002] In the field of engine technology, methanol, as a clean and efficient alternative fuel, has been widely used in various power devices. As the core component for methanol delivery, the operational stability of the fuel gear pump directly affects the engine's working efficiency and service life.

[0003] When existing fuel gear pumps deliver methanol to the engine, the mechanical energy generated by the motor and the electrical energy from the control box circuitry are converted into a large amount of heat. Traditional designs lack specific heat dissipation features, causing heat to accumulate inside the motor and control box. Methanol itself has limited thermal conductivity, and the existing pump body lacks an effective heat transfer path. High temperatures not only reduce motor output power and affect the sensitivity of control box components, but may also alter the characteristics of methanol fuel, leading to aging of pump seals, accelerated gear wear, and in severe cases, pump failure. This disrupts normal engine operation and fails to meet the engine's requirements for efficient and stable fuel delivery systems. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a fuel gear pump.

[0005] The present invention discloses a fuel gear pump, comprising a motor, an electrical control box, and a pump head. A heat-conducting box is connected between the motor and the electrical control box, and both the motor and the electrical control box are in contact with the heat-conducting box. A fuel delivery pipe is connected between the outlet of the heat-conducting box and the inlet of the pump head, so as to remove the heat generated by the motor and the electrical control box during operation by means of the fuel stored in the heat-conducting box.

[0006] Furthermore, a cover is installed at the end of the motor away from the heat conduction box, and the motor, electrical control box, heat conduction box, and cover are connected in series by several tie bolts.

[0007] Furthermore, an external drive magnet is installed at the drive end of the motor, and an internal driven magnet is provided inside the external drive magnet. The internal driven magnet is connected to the power input end of the pump head so as to drive the pump head to rotate through magnetic force.

[0008] Furthermore, the cover is placed over the outside of the external drive magnet to provide safety protection when the motor drives the external drive magnet to rotate at high speed.

[0009] Furthermore, the pump head includes a pump casing installed at the end of the cover cylinder. The pump casing has a cavity inside, and a driving helical gear and a driven helical gear are rotatably connected inside the cavity. The driving helical gear and the driven helical gear mesh to create a negative pressure state inside the cavity when the driving helical gear and the driven helical gear rotate.

[0010] Furthermore, the cavity is connected to a fuel delivery pipe to allow fuel to enter the interior of the cavity.

[0011] Furthermore, the driven end of the active helical gear is connected to the driving end of the internal driven magnet for power transmission.

[0012] The beneficial effects of this utility model are as follows: By setting a heat-conducting box between the motor and the control box, and using the methanol fuel to be transported as a heat dissipation medium, a closed-loop heat dissipation channel is formed in conjunction with the fuel delivery pipe. This not only efficiently dissipates the heat generated by the operation of the motor and the control box, avoiding the impact of high temperature on equipment performance and methanol fuel characteristics, but also eliminates the need for additional heat dissipation components, simplifying the structure while reducing energy consumption and ensuring the stability and continuity of engine fuel delivery. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the disassembled structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of the pump head in this utility model; Figure 3 This is a schematic diagram of the assembly structure of this utility model; Figure 4 This is a vertical half-sectional view of the assembled version of this utility model; Figure 5 This is a cross-sectional view of the assembled version of this utility model.

[0014] In the diagram: 1. Motor; 2. Electrical control box; 3. Pump head; 31. Pump housing; 32. Cavity; 33. Driving helical gear; 34. Driven helical gear; 4. Heat conduction box; 5. Fuel delivery pipe; 6. Cover; 7. External driving magnet; 8. Internal driven magnet; 9. Tie bolt. Detailed Implementation

[0015] Reference Figure 1-5 The present invention proposes a fuel gear pump, which includes a motor 1, an electrical control box 2 and a pump head 3. The three are connected by a specific structure to form a complete power transmission and fuel delivery system. The motor 1 provides the power source for the entire device, the electrical control box 2 is responsible for controlling the operating status of the motor 1, and the pump head 3 is the core working component for realizing fuel suction and delivery. A heat-conducting box 4 is connected to both the motor 1 and the control box 2. The outer walls of both the motor 1 and the control box 2 are tightly fitted to the inner wall of the heat-conducting box 4. This structural design allows the heat generated by the motor 1 during operation, as well as the heat dissipated by the circuit board and other electronic components installed inside the control box 2, to be quickly conducted to the heat-conducting box 4. The outlet of the heat-conducting box 4 and the inlet of the pump head 3 are sealed and connected through the fuel delivery pipe 5. A certain amount of fuel is pre-stored inside the heat-conducting box 4. After the heat is conducted to the heat-conducting box 4, the fuel will absorb this heat. Then, under the suction of the pump head 3, the heat-absorbing fuel enters the pump head 3 through the fuel delivery pipe 5, thereby achieving heat dissipation for the motor 1 and the control box 2 and ensuring the stability of the equipment during long-term operation. A cover 6 is fixedly installed at the end of the motor 1 away from the heat conduction box 4. The motor 1, the electrical control box 2, the heat conduction box 4, and the cover 6 are connected in series by several tie bolts 9. The two ends of the tie bolts 9 are locked and fixed by nuts, so that these four components form a solid overall structure, effectively preventing the components from loosening due to vibration during the operation of the equipment and enhancing the overall stability of the device. An external drive magnet 7 is coaxially mounted on the drive end of motor 1. An internal driven magnet 8 is coaxially arranged inside the external drive magnet 7. There is no physical contact between the external drive magnet 7 and the internal driven magnet 8. They only interact through magnetic force. The drive end of the internal driven magnet 8 is fixedly connected to the power input end of the pump head 3. When motor 1 starts, its output shaft drives the external drive magnet 7 to rotate at high speed. The external drive magnet 7 attracts and drives the internal driven magnet 8 to rotate synchronously through magnetic force, thereby transmitting the power of motor 1 to pump head 3 and realizing the power drive of pump head 3. This magnetic transmission method avoids the wear problem of traditional mechanical transmission and extends the service life of the equipment. The cover 6 has a cylindrical structure. One end of it is fixedly connected to the end of the motor 1. The cover 6 completely covers the outside of the outer driving magnet 7 and the inner driven magnet 8, forming a closed protective space. When the motor 1 drives the outer driving magnet 7 to rotate at high speed, the cover 6 can effectively block external objects from contacting the rotating parts and prevent the rotating parts from accidentally falling off and causing safety hazards, thus playing a reliable safety protection role. The pump head 3 includes a pump housing 31 fixedly installed at the end of the cover 6. A cylindrical cavity 32 is opened inside the pump housing 31. The cavity 32 is rotatably connected to a driving helical gear 33 and a driven helical gear 34 through bearings. The tooth profiles of the driving helical gear 33 and the driven helical gear 34 are adapted to each other and fully meshed. The driven end of the driving helical gear 33 is fixedly connected to the driving end of the inner driven magnet 8 through a key. When the inner driven magnet 8 rotates, it will directly drive the driving helical gear 33 to rotate synchronously. The driving helical gear 33 then drives the driven helical gear 34 to rotate in the opposite direction. During the rotation of the driving helical gear 33 and the driven helical gear 34, the tooth groove space at the meshing point will change periodically, so that a negative pressure state is formed inside the cavity 32, which provides power for the intake of fuel. A feed inlet is provided at the top of the cavity 32. This feed inlet is sealed to the outlet of the fuel delivery pipe 5, so that the heat conduction box 4 is connected to the inside of the cavity 32. When a negative pressure is formed inside the cavity 32, the fuel delivery pipe 5 will generate a suction effect on the inside of the heat conduction box 4. Under the action of negative pressure, the fuel inside the heat conduction box 4 enters the cavity 32 through the fuel delivery pipe 5 and fills the space between the teeth of the driving helical gear 33 and the driven helical gear 34. As the gears continue to rotate, the fuel in the teeth is pushed to the bottom outlet of the cavity 32 and finally transported to the external fuel pipeline under pressure, completing the fuel suction and transportation process.

[0016] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fuel gear pump, comprising a motor (1), an electrical control box (2), and a pump head (3), characterized in that, The motor (1) and the control box (2) are connected together by a heat-conducting box (4), and the motor (1) and the control box (2) are both in contact with the heat-conducting box (4). The outlet of the heat-conducting box (4) and the inlet of the pump head (3) are connected together by a fuel delivery pipe (5) so as to use the fuel stored in the heat-conducting box (4) to remove the heat generated by the motor (1) and the control box (2) when they are working.

2. The fuel gear pump according to claim 1, characterized in that, The motor (1) is equipped with a cover (6) at the end away from the heat conduction box (4). The motor (1), the control box (2), the heat conduction box (4), and the cover (6) are connected in series by several tie bolts (9).

3. The fuel gear pump according to claim 2, characterized in that, An external driving magnet (7) is installed at the drive end of the motor (1). An internal driven magnet (8) is provided inside the external driving magnet (7). The internal driven magnet (8) is connected to the power input end of the pump head (3) so as to drive the pump head (3) to rotate through magnetic force.

4. The fuel gear pump according to claim 3, characterized in that, The cover (6) is placed over the outside of the external drive magnet (7) to provide safety protection when the motor (1) drives the external drive magnet (7) to rotate at high speed.

5. The fuel gear pump according to claim 1, characterized in that, The pump head (3) includes a pump housing (31) installed at the end of the cover (6). A cavity (32) is provided inside the pump housing (31). A driving helical gear (33) and a driven helical gear (34) are rotatably connected inside the cavity (32). The driving helical gear (33) and the driven helical gear (34) mesh to make the cavity (32) negative pressure when the driving helical gear (33) and the driven helical gear (34) rotate.

6. The fuel gear pump according to claim 5, characterized in that, The cavity (32) is connected to the fuel delivery pipe (5) to allow fuel to enter the interior of the cavity (32).

7. The fuel gear pump according to claim 5, characterized in that, The driven end of the active helical gear (33) is connected to the driving end of the inner driven magnet (8) for power transmission.

Images