Gear pump suitable for low viscosity oil

Abstract

The utility model discloses a gear pump suitable for low viscosity oil product, including oil inlet board, internal gear and external gear, the external gear rotatablely installed in the oil inlet board, the internal gear eccentricity engages to the inside of external gear, still include: driving part, upper teflon cloth and limit piece, the driving part with the internal rotation is connected for drive the internal gear rotation, the outside radial extension of driving part is limited to outward limit piece. The utility model discloses through setting up upper teflon cloth at the top of internal gear and external gear, utilizes the sealing characteristic of teflon cloth, effectively reduces the leakage of low viscosity oil product in gear end face from high pressure area to low pressure area, improves the pumping efficiency, limit piece and driving part limit cooperation, limit the deformation opening of upper teflon cloth, prevent its from excessive deformation and unable to reset, guarantee the stability and durability of sealing, ensure that gear pump maintains good sealing performance and pumping efficiency in long -term operation.

Description

Technical Field

[0001] This utility model relates to the technical field of internal gear pumps, and more particularly to a gear pump suitable for low viscosity oils. Background Technology

[0002] Traditional gear pumps have long dominated the field of oil transportation, achieving their pumping function through the eccentric meshing of internal and external gears.

[0003] However, existing gear pumps have significant technical drawbacks when used with low-viscosity oils (such as gasoline and kerosene): due to the weak intermolecular forces and high fluidity of low-viscosity oils, leakage easily occurs from the gap between the gear end faces under the pressure difference between the high-pressure and low-pressure zones. This leakage leads to a reduction in pumping efficiency. Utility Model Content

[0004] In view of the aforementioned problems with existing gear pumps, the aim is to provide a gear pump suitable for low viscosity oils.

[0005] The specific technical solution is as follows: A gear pump suitable for low-viscosity oils includes an inlet plate, an internal gear, and an external gear. The external gear is rotatably mounted within the inlet plate, and the internal gear is eccentrically meshed with the external gear. The pump also includes: A driving component, which is rotatably connected to the inner gear and is used to drive the inner gear to rotate, wherein the driving component has a limiting portion extending radially outward. The upper Teflon cloth is sealed to the top of the internal gear and the external gear; A limiting piece is sleeved on the outside of the driving member and located between the limiting part and the upper Teflon cloth, for limiting and pressing the upper Teflon cloth to the top of the internal gear and the external gear; The oil pump chamber is formed between the upper Teflon cloth, the external gear, and the bottom inner wall of the oil inlet plate, and the bottom of the oil inlet plate has an oil inlet that communicates with the oil pump chamber.

[0006] As a further improvement and optimization of this solution, it also includes: a pole housing and an armature component, wherein the pole housing has an opening at the bottom and an oil outlet at the top, the top of the oil inlet plate is fitted inside the pole housing, the armature component is installed inside the pole housing, and the output shaft of the armature component is connected to the drive component for transmission.

[0007] As a further improvement and optimization of this solution, the bottom of the driving component forms a driving part, and the top of the internal gear has a driving groove. The driving part is fitted into the driving groove. When the driving component rotates, the internal gear is driven to rotate synchronously under the cooperation of the driving part and the driving groove.

[0008] As a further improvement and optimization of this solution, the drive component is sleeved outside the output shaft of the armature component, and the output shaft of the armature component passes through the internal gear and is rotatably connected to the oil inlet plate through the lower bearing.

[0009] As a further improvement and optimization of this solution, the bottom of the drive groove extends downward with a positioning hole, and a part of the lower bearing is rotatably mounted on the oil inlet plate and the other part is rotatably mounted in the positioning hole.

[0010] As a further improvement and optimization of this solution, a lower Teflon cloth is also provided between the bottom of the drive unit and the top of the lower bearing.

[0011] As a further improvement and optimization of this solution, the bottom inner wall of the oil inlet plate extends downward with a positioning groove, and a part of the lower bearing is rotatably disposed in the positioning groove.

[0012] As a further improvement and optimization of this solution, the driving part is a non-cylindrical structure.

[0013] As a further improvement and optimization of this solution, the oil inlet is a tapered inlet with the opening decreasing from bottom to top.

[0014] As a further improvement and optimization of this solution, the limiting piece is made of stainless steel.

[0015] The positive effects of the above technical solution compared with the existing technology are: (1) In this utility model, by setting Teflon cloth on the top of the internal and external gears, the sealing characteristics of Teflon cloth are utilized to effectively reduce the leakage of low viscosity oil from the high pressure area to the low pressure area on the gear end face, thereby improving the pumping efficiency; the limiting plate and the driving component limit the deformation opening of the Teflon cloth, preventing it from failing to reset due to excessive deformation, ensuring the stability and durability of the seal, and ensuring that the gear pump maintains good sealing performance and pumping efficiency during long-term operation.

[0016] (2) In this utility model, the lower Teflon cloth forms a seal between the drive part and the lower bearing to prevent oil leakage from this part, which further improves the sealing performance of the gear pump; at the same time, the Teflon cloth has self-lubricating properties, which can reduce the friction between the drive part and the lower bearing, reduce energy loss, and extend the service life of the components. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a gear pump suitable for low viscosity oils according to the present invention; Figure 2This is an exploded schematic diagram of the drive component, upper Teflon cloth, and lower Teflon cloth of a gear pump suitable for low viscosity oils according to this utility model. In the attached diagram: 1. Oil inlet plate; 2. External gear; 3. Internal gear; 4. Armature assembly; 5. Lower bearing; 6. Upper Teflon cloth; 7. Limiting plate; 8. Drive component; 9. Lower Teflon cloth; 10. Pole shell; 20. Ceramic substrate; 21. Oil inlet; 81. Limiting part; 82. Drive part. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Figure 1 This is a schematic diagram of the structure of a gear pump suitable for low-viscosity oils according to the present invention. Figure 2 This is a schematic diagram of the drive component, upper Teflon cloth, and lower Teflon cloth of a gear pump suitable for low-viscosity oils according to this utility model. Figure 1-2The diagram illustrates a preferred embodiment of a gear pump suitable for low-viscosity oils, comprising an inlet plate 1, an internal gear 3, and an external gear 2. The external gear 2 is rotatably mounted within the inlet plate 1, and the internal gear 3 is eccentrically meshed with the external gear 2. The pump also includes a drive member 8, an upper Teflon cloth 6, and a limiting plate 7. The drive member 8 is rotatably connected to the internal gear 3 and is used to drive the internal gear 3 to rotate. A limiting portion 81 extends radially outward from the outside of the drive member 8. The upper Teflon cloth 6 seals and covers the tops of the internal gear 3 and the external gear 2. The limiting plate 7 is sleeved on the outside of the drive member 8 and located at the limiting portion. Between the positioning part 81 and the upper Teflon cloth 6, the upper Teflon cloth 6 is used to limit and press it to the top of the internal gear 3 and the external gear 2; wherein, the upper Teflon cloth 6, the external gear 2, and the bottom inner wall of the oil inlet plate 1 form an oil pumping chamber. The bottom of the oil inlet plate 1 has an oil inlet 21 that communicates with the oil pumping chamber. When the driving member 8 drives the internal gear 3 to rotate and drives the external gear 2 to rotate, oil enters the oil pumping chamber through the oil inlet 21. When the internal pressure of the oil pumping chamber reaches a certain value, the upper Teflon cloth 6 deforms and a gap is generated with the top end face of the external gear 2, and the oil is pumped out from the oil pumping chamber.

[0022] Even better, the inner gear 3 has teeth on its outer wall, and the outer gear 2 has teeth on its inner wall.

[0023] In this application, by installing Teflon cloth 6 on the top of the internal and external gears, the sealing properties of Teflon cloth are utilized to effectively reduce the leakage of low-viscosity oil from the high-pressure area to the low-pressure area on the gear end face, thereby improving pumping efficiency. The limiting plate 7 and the driving component 8 cooperate to limit the deformation opening of the Teflon cloth 6, preventing it from failing to reset due to excessive deformation, ensuring the stability and durability of the seal, and ensuring that the gear pump maintains good sealing performance and pumping efficiency during long-term operation.

[0024] Furthermore, as a preferred embodiment, it also includes: a pole housing 10 and an armature component 4. The pole housing 10 has an opening at the bottom and an oil outlet at the top. The top of the oil inlet plate 1 is fitted inside the pole housing 10. The armature component 4 is installed inside the pole housing 10, and the output shaft of the armature component 4 is connected to the drive component 8 for transmission. The pole housing 10 provides installation space and a protective structure for the oil inlet plate 1 and the armature component 4, making the overall structure of the gear pump more compact and highly integrated. The armature component 4 is directly installed inside the pole housing 10 and connected to the drive component 8 through the output shaft, reducing transmission components, reducing energy loss, improving transmission efficiency, and facilitating installation and maintenance.

[0025] More preferably, ceramic substrates 20 are provided between the external gear 2 and the inner side wall of the oil inlet plate 1, and between the bottom of the external gear 2 and the inner side wall of the oil inlet plate 1, to reduce the friction between the external gear 2, the inner side wall of the oil inlet plate 1 and the inner side wall of the oil inlet plate 1.

[0026] Furthermore, in a preferred embodiment, the bottom of the driving member 8 forms a driving part 82, and the top of the internal gear 3 has a driving groove. The driving part 82 is fitted into the driving groove. When the driving member 8 rotates, the internal gear 3 is driven to rotate synchronously by the cooperation of the driving part 82 and the driving groove. The cooperation structure of the driving part 82 and the driving groove is simple and reliable, which can realize precise transmission between the driving member 8 and the internal gear 3, ensuring that the internal gear 3 rotates eccentrically with the external gear 2 in a predetermined manner, thus ensuring the normal oil pumping function of the gear pump. This cooperation method is also convenient for disassembly and installation, which is beneficial for the maintenance and replacement of parts of the gear pump.

[0027] Furthermore, in a preferred embodiment, the drive member 8 is sleeved outside the output shaft of the armature component 4, and the output shaft of the armature component 4 passes through the internal gear 3 and is rotatably connected to the oil inlet plate 1 through the lower bearing 5.

[0028] In one embodiment, the drive member 8 and the output shaft of the armature component 4 are connected by a key structure.

[0029] Furthermore, in a preferred embodiment, the bottom of the drive groove extends downwards with a positioning hole. A portion of the lower bearing 5 is rotatably mounted on the oil inlet plate 1, and another portion is rotatably mounted within the positioning hole. The engagement between the positioning hole and the lower bearing 5 provides precise positioning for the internal gear 3, ensuring that the internal gear 3 remains stable during rotation and does not shift, thereby guaranteeing the meshing accuracy between the internal and external gears 2 and improving the pumping efficiency and stability of the gear pump. Simultaneously, this structure also helps to disperse the stress generated during the rotation of the internal gear 3, reducing the risk of component damage.

[0030] Furthermore, in a preferred embodiment, a lower Teflon cloth 9 is provided between the bottom of the drive unit 82 and the top of the lower bearing 5. The lower Teflon cloth 9 forms a seal between the drive unit 82 and the lower bearing 5, preventing oil leakage from this part and further improving the sealing performance of the gear pump; at the same time, the Teflon cloth has self-lubricating properties, which can reduce friction between the drive unit 82 and the lower bearing 5, reduce energy loss, and extend the service life of the components.

[0031] Furthermore, in a preferred embodiment, the bottom inner wall of the oil inlet plate 1 extends downwards with a positioning groove, and a portion of the lower bearing 5 is rotatably positioned within the positioning groove. The positioning groove provides a precise installation position for the lower bearing 5, ensuring its stable installation and preventing movement or shaking during gear pump operation. This guarantees the smooth rotation and meshing accuracy of the internal and external gears 2; it helps improve the overall performance and reliability of the gear pump and reduces malfunctions and damage caused by unstable component installation. Furthermore, as a preferred embodiment, the drive unit 82 has a non-cylindrical structure. The non-cylindrical structure of the drive unit 82 can form a unique mating relationship with the drive groove, preventing relative rotation between the drive member 8 and the internal gear 3, and ensuring the accuracy and stability of power transmission; this structure can also increase the contact area between the drive unit 82 and the drive groove, improve the torque carrying capacity of the transmission, and enable the gear pump to adapt to different working loads.

[0032] For example, the outer side of the drive unit 82 can be rectangular, and the drive groove can be a rectangular groove.

[0033] Furthermore, as a preferred embodiment, the oil inlet 21 is a tapered inlet with an opening that decreases in size from bottom to top. This tapered inlet design allows for a certain velocity and pressure change in the oil as it enters the pump chamber, facilitating smoother oil flow into the pump, reducing inlet resistance, and improving inlet efficiency. As a further improvement and optimization of this solution, the limiting plate 7 is made of stainless steel. The stainless steel limiting plate 7 has high strength, corrosion resistance and good wear resistance, and can withstand the mechanical stress and oil corrosion during the operation of the gear pump, extending the service life of the limiting plate 7, further ensuring the limiting effect of the upper Teflon cloth 6, and improving the reliability and stability of the entire gear pump.

[0034] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gear pump suitable for low viscosity oil products comprising an oil inlet plate, an inner gear and an outer gear, said outer gear being rotatably mounted within said oil inlet plate, said inner gear being eccentrically engaged within said outer gear, characterised in that, Also includes: A driving component, which is connected to the internal gear for driving the internal gear to rotate, and a limiting portion extending radially outward from the outside of the driving component; The upper Teflon cloth is sealed to the top of the internal gear and the external gear; A limiting piece is sleeved on the outside of the driving member and located between the limiting part and the upper Teflon cloth, for limiting and pressing the upper Teflon cloth to the top of the internal gear and the external gear; The oil pump chamber is formed between the upper Teflon cloth, the external gear, and the bottom inner wall of the oil inlet plate, and the bottom of the oil inlet plate has an oil inlet that communicates with the oil pump chamber.

2. The gear pump suitable for low-viscosity oils according to claim 1, characterized in that, Also includes: The pole housing and armature component are provided. The pole housing has an opening at the bottom and an oil outlet at the top. The top of the oil inlet plate is fitted inside the pole housing. The armature component is installed inside the pole housing, and the output shaft of the armature component is connected to the drive component for transmission.

3. The gear pump suitable for low-viscosity oils according to claim 2, characterized in that, The bottom of the driving component forms a driving part, and the top of the internal gear has a driving groove. The driving part is fitted into the driving groove. When the driving component rotates, the internal gear is driven to rotate synchronously by the cooperation of the driving part and the driving groove.

4. The gear pump suitable for low-viscosity oils according to claim 3, characterized in that, The drive component is sleeved outside the output shaft of the armature component, and the output shaft of the armature component passes through the internal gear and is rotatably connected to the oil inlet plate through the lower bearing.

5. The gear pump suitable for low-viscosity oils according to claim 4, characterized in that, The bottom of the drive groove extends downward with a positioning hole, and a part of the lower bearing is rotatably mounted on the oil inlet plate, while the other part is rotatably mounted in the positioning hole.

6. The gear pump suitable for low-viscosity oils according to claim 5, characterized in that, A lower Teflon cloth is also provided between the bottom of the drive unit and the top of the lower bearing.

7. The gear pump suitable for low-viscosity oils according to claim 6, characterized in that, The bottom inner wall of the oil inlet plate has a positioning groove extending downwards, and a part of the lower bearing is rotatably disposed in the positioning groove.

8. The gear pump suitable for low viscosity oils according to claim 3, characterized in that, The drive unit has a non-cylindrical structure.

9. The gear pump suitable for low-viscosity oils according to claim 1, characterized in that, The oil inlet is a tapered opening with the opening decreasing from bottom to top.

10. The gear pump suitable for low-viscosity oils according to claim 1, characterized in that, The limiting piece is made of stainless steel.

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