Miniature gear pump with multi-stage sealing structure

Abstract

The utility model provides a miniature gear pump with a multistage sealing structure, which is compact in structure and small in occupied space, is directly driven by a motor, reduces effective power loss, forms a liquid circulation space through the combined action of a pump body and a gear assembly, realizes accurate conveying of liquid, and improves the working efficiency. Through the combination of the multi-stage leakage-proof design of the multi-stage sealing structure and the high-performance material, the multi-stage leakage-proof effect is achieved, the sealing performance of the micro gear pump is remarkably improved, and the problem that the sealing performance of an existing traditional micro gear pump sealing structure is insufficient is solved.

Description

[Technical Field]

[0002] This utility model relates to the field of gear pump technology, and in particular to a micro gear pump with a multi-stage sealing structure. [Background Technology]

[0004] A miniature gear pump is a small and efficient liquid transfer device that works by utilizing the gap between the pump body and the meshing gears. Through the synchronized rotation of the gears, liquid is effectively drawn in and discharged, achieving precise liquid transfer.

[0005] In miniature gear pumps, the sealing structure is a critical component, playing a vital role in the normal operation of the pump and preventing leakage. However, the sealing structure design of traditional miniature gear pumps is relatively simple, typically using basic components such as single-lip oil seals and frameless oil seals. Under prolonged operation or exposure to corrosive liquids, these seals are prone to deformation or wear, failing to effectively prevent internal liquid leakage and thus leading to a decrease in delivery efficiency. [Utility Model Content]

[0007] The purpose of this invention is to provide a micro gear pump with a multi-stage sealing structure, thereby solving the problem of insufficient sealing performance of the current traditional micro gear pump sealing structure.

[0008] This utility model is achieved by the following technical solution:

[0009] A miniature gear pump with a multi-stage sealing structure includes a pump body connected to a motor. The pump body is provided with a multi-stage sealing structure and a gear assembly connected to the motor. The pump body and the gear assembly form a flow space for liquid circulation.

[0010] The micro gear pump with a multi-stage sealing structure as described above includes a rotary sealing assembly for preventing liquid leakage, a second seal, and fasteners for securing the second seal.

[0011] As described above, the micro gear pump with a multi-stage sealing structure includes a rotary sealing assembly comprising a sealing ring connected to the motor and an elastic element connected to the sealing ring.

[0012] As described above, the micro gear pump with a multi-stage sealing structure has sealing rings composed of Teflon, carbon fiber, and graphene materials.

[0013] As described above, the micro gear pump with a multi-stage sealing structure includes a pump cover connected to the motor and a pump base connected to the pump cover. The pump cover, the pump base, and the gear assembly form a flow space for liquid circulation.

[0014] As described above, the micro gear pump with a multi-stage sealing structure includes an upper part for accommodating the multi-stage sealing structure and a lower part for accommodating the gear assembly.

[0015] As described above, the micro gear pump with a multi-stage sealing structure has a first receiving groove for accommodating the rotary sealing assembly and the second seal, a second receiving groove for accommodating the second seal, and a third receiving groove for accommodating the fastener on the upper part of the pump cover.

[0016] As described above, the micro gear pump with a multi-stage sealing structure also has multiple overflow holes on the upper part of the pump cover to prevent contamination.

[0017] As described above, the micro gear pump with a multi-stage sealing structure has an inlet and an outlet at the bottom of the pump cover for connecting the flow space.

[0018] As described above, the micro gear pump with a multi-stage sealing structure includes a main gear connected to the motor and a driven gear meshing with the main gear.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention proposes a micro gear pump with a multi-stage sealing structure. First, driven by a motor, the gear assembly rotates. Through the flow space formed by the pump body and the gear assembly, liquid is effectively input and output, achieving precise liquid delivery. Second, a multi-stage sealing structure is formed by a rotary sealing assembly, a second seal, and fasteners. The combined action of these three components achieves a multi-stage sealing effect, effectively preventing liquid leakage inside the pump body, significantly improving the sealing performance of the micro gear pump, and effectively preventing external dust and impurities from entering the flow space, ensuring the pump's cleanliness and operational reliability. Furthermore, by optimizing the materials of the multi-stage sealing structure, the sealing performance is further enhanced.

[0021] This utility model features a micro gear pump with a multi-stage sealing structure. It has a compact structure and occupies little space. Direct drive by a motor reduces effective power loss. The combination of the pump body and gear assembly creates a liquid flow space, enabling precise liquid delivery. The multi-stage leak-proof design of the multi-stage sealing structure, combined with high-performance materials, achieves multi-layered leak-proof effect, significantly improving the sealing performance of the micro gear pump and solving the problem of insufficient sealing performance of current traditional micro gear pump sealing structures. [Attached Image Description]

[0023] Figure 1 The three-dimensional representation of this utility model Figure 1 ;

[0024] Figure 2The three-dimensional representation of this utility model Figure 2 ;

[0025] Figure 3 This is a partial exploded view of the present invention;

[0026] Figure 4 This is a top view of the present invention;

[0027] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0028] Figure 6 for Figure 4 Cross-sectional view at BB;

[0029] Figure 7 This is a top view of the pump body of this utility model;

[0030] Figure 8 for Figure 4 Cross-sectional view of the pump body at point BB.

Detailed Implementation Methods

[0032] The following is in conjunction with the appendix Figure 1-8 The present invention will be further described in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0033] Figure 1-8 The micro gear pump shown has a multi-stage sealing structure, including a pump body 2 connected to a motor 1. The pump body 2 is provided with a multi-stage sealing structure 3 and a gear assembly 4 connected to the motor 1. The pump body 2 and the gear assembly 4 form a flow space 5 for liquid flow.

[0034] Specifically, the multi-stage sealing structure 3 is sleeved on the motor shaft 11 of the motor 1, and the gear assembly 4 is connected to the motor 1 through the motor shaft 11.

[0035] In this implementation, the pump body, as the main component of the micro gear pump, achieves precise liquid delivery and multiple leak-proof effects through its internal multi-functional integrated structure design. Specifically, the motor drives the gear assembly to rotate, and the liquid is effectively drawn in and discharged through the flow space formed by the pump body and the gear assembly, thus achieving liquid delivery. The multi-stage sealing structure effectively prevents liquid leakage inside the pump body, significantly improving the sealing performance of the micro gear pump. It also effectively prevents external dust and impurities from entering the flow space, ensuring the pump's cleanliness and operational reliability.

[0036] Furthermore, the multi-stage sealing structure 3 includes a rotary sealing assembly 31 for preventing liquid leakage and a second seal 32, as well as a fastener 33 for securing the second seal 32.

[0037] Specifically, the second seal 32 is provided with a fixing protrusion for abutting against the rotary sealing assembly 31 (as shown in the attached figure). Figure 6 As shown in the figure, the fastener 33 is a snap ring.

[0038] In this implementation, the rotary sealing assembly, the second seal, and the fasteners work together to achieve a multi-stage sealing effect, improving the overall sealing performance and reliability of the micro gear pump. Specifically, the rotary sealing assembly, as the main sealing structure, achieves a primary sealing effect through rotational friction with the motor shaft, effectively preventing liquid leakage inside the pump body and significantly improving the sealing performance of the micro gear pump. The second seal and fasteners, as auxiliary sealing structures, are tightly connected to the motor shaft through the pump body to achieve a mechanical seal. The fasteners then secure the second seal, achieving a secondary sealing effect, effectively preventing external dust and impurities from entering the flow space and ensuring the cleanliness and operational reliability of the pump.

[0039] Furthermore, the rotary sealing assembly 31 includes a sealing ring 311 connected to the motor 1 and an elastic member 312 connected to the sealing ring 311.

[0040] Specifically, the sealing ring 311 is provided with a groove for accommodating the elastic member 312 (as shown in the attached image). Figure 3 , 6 As shown in the figure, the elastic element 312 is an O-ring.

[0041] In this embodiment, a rotary seal assembly consists of a sealing ring and an elastic element. The sealing ring connects to the motor shaft and moves with it, providing a dynamic sealing effect to prevent axial leakage of liquid inside the pump body. The elastic element provides pre-tension to ensure a tight fit between the sealing ring and the motor, preventing radial leakage. Through the dynamic sealing of the sealing ring and the pre-tension of the elastic element, a bidirectional sealing effect is achieved in the rotary seal assembly.

[0042] Furthermore, the sealing ring 311 is composed of Teflon, carbon fiber and graphene materials.

[0043] In this implementation, the sealing ring utilizes Teflon, carbon fiber, and graphene materials, fully leveraging the advantages of each material to improve the pump's sealing performance and operational reliability. Teflon (PTFE) possesses excellent chemical resistance, resisting corrosion from various chemicals; it also exhibits low friction, reducing frictional resistance between components, lowering energy consumption, and improving pump efficiency; furthermore, it has high wear resistance. Carbon fiber, with its high strength and lightweight properties, significantly enhances the strength and rigidity of the sealing ring, enabling it to withstand higher pressures and temperatures. Graphene, with its excellent thermal conductivity and high-temperature resistance, improves the sealing ring's thermal conductivity, effectively dissipating heat generated during pump operation and preventing overheating damage to the sealing ring.

[0044] Furthermore, the pump body 2 includes a pump cover 21 connected to the motor 1 and a pump base 22 connected to the pump cover 21. The pump cover 21, the pump base 22 and the gear assembly 4 form a flow space 5 for liquid circulation.

[0045] Furthermore, the pump cover 21 includes an upper part 6 for accommodating the multi-stage sealing structure 3 and a lower part 7 for accommodating the gear assembly 4.

[0046] Specifically, the lower part 7 of the pump cover is provided with a receiving space 71 for accommodating the gear assembly 4.

[0047] In this implementation, the internal modular design of the pump cover provides a stable support structure for the multi-stage sealing structure and gear assembly, ensuring their correct position and normal operation within the pump body.

[0048] Furthermore, the upper part 6 of the pump cover is provided with a first receiving groove 61 for accommodating the rotary sealing assembly 31 and the second sealing member 32, a second receiving groove 62 for accommodating the second sealing member 32, and a third receiving groove 63 for accommodating the fastener 33.

[0049] In this implementation, a dedicated receiving groove is provided on the upper part of the pump cover for the rotary seal assembly, the second seal, and the fasteners. This groove provides a closed space for the corresponding components, reducing the risk of external dust and impurities entering and protecting the cleanliness and functional integrity of the components. The tight fit between the receiving groove and the corresponding components effectively reduces the space where liquid might leak inside the pump body, enhancing the sealing effect.

[0050] Furthermore, the upper part 6 of the pump cover is also provided with a plurality of overflow holes 213 for preventing contamination.

[0051] Furthermore, the lower part 7 of the pump cover is provided with an inlet 23 and an outlet 24 for connecting the flow space 5.

[0052] In this implementation, the inlet and outlet are connected to the internal flow space of the pump body to realize the input and output of liquid and complete the liquid transportation process.

[0053] Furthermore, the gear assembly 4 includes a main gear 41 connected to the motor 1 and a driven gear 42 meshing with the main gear 41.

[0054] In this implementation, the main gear is connected to the motor, transmitting the motor's power to the driven gear to achieve pump body rotation and liquid transport. Furthermore, the meshing transmission between the main and driven gears ensures smooth power transmission, reducing vibration and noise within the pump body.

[0055] This utility model features a micro gear pump with a multi-stage sealing structure. Driven directly by a motor, it reduces effective power loss. Through the combined action of the pump body and gear assembly, a liquid flow space is formed, enabling precise liquid delivery. The multi-stage leak-proof design of the multi-stage sealing structure, combined with high-performance materials, achieves multi-layered leak-proof effects, significantly improving the sealing performance of the micro gear pump and solving the problem of insufficient sealing performance in current traditional micro gear pump sealing structures.

[0056] The above description describes the implementation methods in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Furthermore, due to differences in industry naming conventions, it is not limited to the above names or the English names. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. A miniature gear pump with a multi-stage sealing structure, comprising a pump body (2) connected to a motor (1), characterized in that: The pump body (2) is provided with a multi-stage sealing structure (3) and a gear assembly (4) connected to the motor (1), and the pump body (2) and the gear assembly (4) form a flow space (5) for liquid flow. The multi-stage sealing structure (3) includes a rotary sealing assembly (31) for preventing liquid leakage and a second seal (32), as well as fasteners (33) for securing the second seal (32).

2. The micro gear pump with a multi-stage sealing structure according to claim 1, characterized in that: The rotary sealing assembly (31) includes a sealing ring (311) connected to the motor (1) and an elastic element (312) connected to the sealing ring (311).

3. The micro gear pump with a multi-stage sealing structure according to claim 2, characterized in that: The sealing ring (311) is composed of Teflon, carbon fiber and graphene materials.

4. The micro gear pump with a multi-stage sealing structure according to claim 1, characterized in that: The pump body (2) includes a pump cover (21) connected to the motor (1) and a pump base (22) connected to the pump cover (21). The pump cover (21), the pump base (22) and the gear assembly (4) form a flow space (5) for liquid flow.

5. The micro gear pump with a multi-stage sealing structure according to claim 4, characterized in that: The pump cover (21) includes an upper part (6) for accommodating the multi-stage sealing structure (3) and a lower part (7) for accommodating the gear assembly (4).

6. The micro gear pump with a multi-stage sealing structure according to claim 5, characterized in that: The upper part (6) of the pump cover is provided with a first receiving groove (61) for accommodating the rotary sealing assembly (31) and the second seal (32), a second receiving groove (62) for accommodating the second seal (32), and a third receiving groove (63) for accommodating the fastener (33).

7. The micro gear pump with a multi-stage sealing structure according to claim 5, characterized in that: The upper part (6) of the pump cover is also provided with multiple overflow holes (213) for preventing pollution.

8. The micro gear pump with a multi-stage sealing structure according to claim 5, characterized in that: The lower part (7) of the pump cover is provided with an inlet (23) and an outlet (24) for connecting the flow space (5).

9. The micro gear pump with a multi-stage sealing structure according to claim 1, characterized in that: The gear assembly (4) includes a main gear (41) connected to the motor (1) and a driven gear (42) meshing with the main gear (41).

Images