Speed-adjustable anticorrosive methanol pump

Abstract

The utility model discloses a kind of adjustable-speed anticorrosive methanol pumps, including shell, upper end cap, lower end cap and rotating component, wherein, the upper end cap and lower end cap are respectively installed at the both ends of the shell, the shell inside is equipped with the rotating component, pump cavity and stator cavity, the both sides of the rotating component are equipped with the pump cavity and stator cavity respectively;The upper end cap is equipped with the inlet connector and outlet connector of communicating pump cavity;Stator and rotor are equipped in the stator cavity, further including isolating cover, the upper end opening of the isolating cover, the opening is sealed at least with one of the upper end cap, shell;The rotating component and rotor are located in the isolating cover.The utility model has compact structure, can prevent stator, controller and other parts are corroded by methanol fuel and the like advantages.

Description

Technical Field

[0001] This utility model relates to the field of methanol pump technology, and in particular to an adjustable speed and corrosion-resistant methanol pump. Background Technology

[0002] Traditional methanol fuel pumps operate at a pressure of 3-5 bar and can only be used at one stable speed. The pump flow rate varies greatly depending on the operating conditions. This can cause a large amount of fuel leakage at idle, increasing heat loss. This not only raises the fuel temperature but also places high demands on the pressure relief valve.

[0003] Existing patent document CN119778129A discloses a variable-speed brushless motor methanol pump, which improves fuel delivery efficiency and reduces heat loss by employing adjustable fuel delivery volume, resulting in more stable fuel temperature. High-pressure fuel injection temperature determines the quality of cyclic fuel injection, and the consistency of high-pressure fuel injection temperature in each cylinder affects the consistency of cyclic fuel injection volume; low-pressure fuel supply temperature affects the quality of fuel drawn into the high-pressure system, thus affecting high-pressure injection characteristics. Existing patent document CN119778129A places the fuel outlet and inlet connectors at opposite ends of the methanol pump's axial direction, ensuring good heat dissipation as methanol flows through each component of the methanol pump and brushless motor. However, methanol is highly corrosive, and the large-area contact between methanol fuel and methanol-containing parts places higher demands on the corrosion resistance of the methanol pump components and motor assemblies, inevitably leading to increased costs.

[0004] Existing patent document CN 222185120 U discloses a rapid pressure-building methanol pump. In this patent, the oil outlet and inlet are located on the same side. During methanol transportation, the methanol enters through the methanol inlet, fills the gear cavity, and then exits through the oil outlet. The methanol does not pass through the motor rotor cavity, thus failing to cool the heat generated by the rotor, resulting in poor heat dissipation and affecting the motor's lifespan. Furthermore, there is no isolation between the methanol and the motor stator, leading to extensive contact between the methanol fuel and methanol-containing parts, causing corrosion.

[0005] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0006] The main purpose of this utility model is to propose a methanol pump that prevents the stator, controller and other parts from being corroded by methanol fuel.

[0007] Therefore, this utility model proposes an adjustable speed and corrosion-resistant methanol pump.

[0008] Preferably, the present invention may also have the following technical features:

[0009] An adjustable-speed, corrosion-resistant methanol pump includes a housing, an upper end cover, a lower end cover, and a rotating component. The upper and lower end covers are respectively installed at both ends of the housing. The rotating component, a pump chamber, and a stator chamber are disposed inside the housing. The pump chamber and stator chamber are respectively located on both sides of the rotating component. The upper end cover has an inlet connector and an outlet connector communicating with the pump chamber. The stator chamber contains a stator and a rotor. The pump also includes an isolation cover with an opening at its upper end, the opening being sealed to at least one of the upper end cover and the housing. The rotating component and the rotor are located inside the isolation cover.

[0010] Furthermore, the controller is installed on the inside of the lower end cover.

[0011] Furthermore, the opening fits between the outer side of the upper cover and the inner side of the upper end of the housing.

[0012] Furthermore, a first sealing groove is provided on the outer side of the upper end cover, and a first sealing ring is installed in the first sealing groove.

[0013] Furthermore, the end of the housing is provided with a second sealing groove, in which a second sealing ring is installed.

[0014] Furthermore, the isolation cover has a boss structure, and its internal assembly cavity is a stepped cavity.

[0015] Furthermore, the isolation cover is made of stainless steel.

[0016] Furthermore, the inlet connector is equipped with a filter screen.

[0017] Furthermore, the outer side of the methanol casing is also provided with several heat dissipation fins.

[0018] Furthermore, the heat dissipation fins are arranged in a staggered pattern.

[0019] The beneficial effects of this invention compared to existing technologies include: when the rotating component rotates, the negative pressure generated by the rotation draws fuel into the oil inlet through the inlet connector, and the fuel is then drawn into the pump chamber by the rotating component; the fuel flows into the motor rotor side and the oil outlet side respectively through two paths; due to the isolation effect of the isolation cover, the fuel will not come into contact with parts such as the stator outside the isolation cover, reducing the corrosion of the stator and other parts by the fuel. The oil inlet and outlet connectors are arranged on the upper end cover, shortening the distance of methanol liquid flow, reducing heat loss caused by high-speed liquid impact, and improving transmission efficiency. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention.

[0021] Figure 2 This is a schematic diagram of the upper cover and electronic rotor of this utility model.

[0022] Figure 3 This is a schematic diagram of the installation of the isolation cover of this utility model. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0024] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0025] like Figure 1-3 The illustrated adjustable-speed, corrosion-resistant methanol pump includes a housing 2, an upper end cover 1, a lower end cover 3, and a rotating component. The upper end cover 1 and lower end cover 3 are respectively installed at both ends of the housing 2. The housing 2 contains the rotating component, a pump chamber 22, and a stator chamber 21. The pump chamber 22 and stator chamber 21 are respectively located on both sides of the rotating component. The upper end cover 1 has an inlet connector 12 and an outlet connector 11 communicating with the pump chamber 22. The stator chamber 21 contains a stator 62 and a rotor 61. In one embodiment of the aforementioned technical features and connection relationships, the structure is similar to that shown in existing patent documents CN119778129A or CN222185120U; in other words, this embodiment is a further optimization and improvement based on the structure of existing patent documents CN119778129A or CN222185120U. Specifically, the improvement of this application is that it also includes an isolation cover 5, the upper end of which has an opening that fits between the outer side of the upper cover 1 and the inner side of the upper end of the housing 2, and the rotating component and rotor 61 are located inside the isolation cover 5. The interior of the isolation cover 5 forms an assembly cavity that encloses the rotating component and the motor rotor 61.

[0026] Specifically, the upper end cover 1 is provided with an oil inlet channel 14, an oil outlet channel 13, an inlet connector 12, and an outlet connector 11. That is, compared to the existing patent document CN119778129A, this embodiment not only adds an isolation cover 5, but also concentrates the oil inlet channel 14, oil outlet channel 13, inlet connector 12, and outlet connector 11 on the upper end cover 1. In this way, when the rotating component rotates, the negative pressure generated by the rotation of the rotating component draws fuel into the oil inlet channel 14 and pump chamber 22 through the inlet connector 12; then, it is transferred to the other side by the rotating component, causing the fuel to flow into the motor rotor 61 side and the oil outlet channel 13 side respectively. Due to the isolation effect of the isolation cover 5, the fuel will not come into contact with parts such as the stator 62 outside the isolation cover 5, reducing the corrosion of the stator 62 and other parts by the fuel. Moreover, when the methanol pump is working, the outside of the motor rotor 61 is filled with fuel, which can carry away some of the heat of the motor rotor 61, preventing the rotor 61 from overheating during operation. In this embodiment, the inlet and outlet oil connectors are arranged on the upper end cover 1 to shorten the distance of methanol liquid flow, reduce heat loss caused by high-speed liquid impact, and improve transmission efficiency. A controller 4 is installed on the inner side of the lower end cover 3, and a controller connector 41 is provided on the outer side of the lower end cover 3.

[0027] Preferably, the outer side of the upper end cover 1 is provided with a first sealing groove 10, in which a first sealing ring 9 is installed to seal the gap between the inner side of the isolation cover 5 and the upper end cover 1. Further, the end of the housing 2 is also provided with a second sealing groove, in which a second sealing ring 8 is installed to seal the gap between the outer side of the isolation cover 5 and the inner side of the housing 2. In this way, the first sealing ring 9 and the second sealing ring 8 sandwich the isolation cover 5 in the middle, effectively preventing the isolation cover 5 from shifting and sealing it to prevent fuel from overflowing from the isolation cover 5.

[0028] The isolation cover 5 has a boss structure to facilitate the placement of the stator 62. Simultaneously, the internal assembly cavity of the isolation cover 5 is a stepped cavity. The isolation cover 5 is made of stainless steel. In this embodiment, since the size of the rotating component is larger than the outer diameter of the rotor 61, the isolation cover 5 is designed with an external boss structure and an internal stepped cavity to accommodate the layout of the rotating component, rotor 61, and stator 62. The small end of the isolation cover 5 covers the rotor 61, separating the rotor 61 and the stator 62, while the large end of the isolation cover 5 covers the rotating component, thus enclosing it.

[0029] The rotating component (pump assembly) includes an inner rotor 72, an outer rotor 73, an upper cover plate 74, and a lower cover plate 71, which are combined to form a gear pump structure. The working principle of the gear pump is as follows: the outer rotor 73 and the inner rotor 72 differ by one tooth, so there is an eccentricity between the axis of the inner and outer rotors. The inner rotor 72 acts as the driving wheel, and a sealed volume is formed between the inner and outer rotors and the upper and lower cover plates. The meshing line of the inner and outer rotors divides the sealed volume into an oil suction chamber and an oil pressure chamber. When the inner rotor 72 disengages, the sealed volume gradually increases, creating a local vacuum. Oil enters the sealed volume under pressure, i.e., oil suction. When the inner rotor 72 engages, the sealed volume gradually decreases, the oil is squeezed, and the pressure increases, i.e., oil discharge. In this embodiment, the upper cover plate 74 and the lower cover plate 71 are respectively provided with a first connecting hole 741 and a second connecting hole 711 to connect the oil pressure chamber of the gear pump. In this way, when the fuel reaches the oil pressure chamber, the fuel enters the motor rotor side and the oil outlet side through the first connecting hole 741 and the second connecting hole 711.

[0030] In a preferred embodiment, the inlet connector 12 is equipped with a filter screen to prevent particulate impurities mixed in the methanol fuel from entering the methanol.

[0031] The outer side of the methanol pump housing 2 is also provided with several heat dissipation fins 23. Preferably, the heat dissipation fins 23 are arranged in an alternating manner, which is conducive to heat dissipation of the methanol pump and avoids methanol evaporation.

[0032] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0033] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. An adjustable speed and corrosion-resistant methanol pump, comprising a housing, an upper end cover, a lower end cover, and a rotating component, wherein, The upper end cover and the lower end cover are respectively installed at both ends of the housing. The housing is provided with the rotating component, the pump chamber and the stator chamber. The pump chamber and the stator chamber are respectively provided on both sides of the rotating component. The upper end cover is provided with an inlet connector and an outlet connector communicating with the pump chamber. The stator chamber is provided with a stator and a rotor. The feature is that it further includes an isolation cover with an opening at the upper end. The opening is sealed to at least one of the upper end cover and the housing. The rotating component and the rotor are located inside the isolation cover.

2. The adjustable speed and corrosion-resistant methanol pump as described in claim 1, characterized in that: It also includes a controller, which is installed inside the lower end cover.

3. The adjustable speed and corrosion-resistant methanol pump as described in claim 2, characterized in that: The opening fits between the outer side of the upper cover and the inner side of the upper end of the housing.

4. The adjustable speed and corrosion-resistant methanol pump as described in claim 3, characterized in that: The outer side of the upper cover is provided with a first sealing groove, and a first sealing ring is installed in the first sealing groove.

5. The adjustable speed and corrosion-resistant methanol pump as described in claim 3 or 4, characterized in that: The end of the housing is also provided with a second sealing groove, in which a second sealing ring is installed.

6. The adjustable speed and corrosion-resistant methanol pump as described in claim 1, characterized in that: The isolation cover has a boss structure, and its internal assembly cavity is a stepped cavity.

7. The adjustable speed and corrosion-resistant methanol pump as described in claim 1, characterized in that: The isolation cover is made of stainless steel.

8. The adjustable speed and corrosion-resistant methanol pump as described in claim 1, characterized in that: The inlet connector is equipped with a filter screen.

9. The adjustable speed and corrosion-resistant methanol pump as described in claim 1, characterized in that: The outer side of the methanol casing is also provided with several heat dissipation fins.

10. The adjustable speed and corrosion-resistant methanol pump as described in claim 9, characterized in that: The heat dissipation fins are arranged in an alternating pattern.

Images