Miniature gear pump with double seals

Abstract

According to the miniature gear pump with the double seal, the gear assembly is driven by the motor, efficient liquid conveying is achieved, the double seal effect is achieved through the first-stage sealing assembly and the second-stage sealing assembly, liquid can be prevented from leaking outwards from the interior of the pump body and can also be prevented from flowing into the motor, and the service life of the pump body is prolonged. The problem that an existing single sealing structure cannot completely prevent liquid from flowing into a motor is solved.

Description

[Technical Field]

[0001] This utility model relates to the field of gear pump technology, and in particular to a miniature gear pump with double seals. [Background Technology]

[0002] A miniature gear pump is a small and efficient liquid transfer device that uses the meshing and rotation of gears to change the volume inside the pump body, thereby enabling the intake and discharge of liquids.

[0003] Traditional miniature gear pumps typically use sealing rings or gaskets to prevent liquid from leaking out of the pump body. However, a single sealing structure cannot provide a complete seal, and some liquid may flow into the motor through the seal gaps. This can damage the internal insulation materials of the motor or corrode the coils, leading to motor damage. [Utility Model Content]

[0004] The purpose of this invention is to provide a miniature gear pump with double seals, which solves the problem that current single-seal structures cannot completely prevent liquid from flowing into the motor.

[0005] This utility model is achieved by the following technical solution:

[0006] A miniature gear pump with dual seals includes a pump body connected to a motor and a gear assembly housed within the pump body. A primary sealing assembly for preventing liquid leakage and a secondary seal for protecting the motor are provided between the gear assembly and the motor.

[0007] As described above, the micro gear pump with double seals has a motor provided with a first fixing groove for connection, and the secondary seal is fitted onto the first fixing groove.

[0008] As described above, the micro gear pump with dual seals includes a primary sealing assembly comprising a bidirectional elastic element connected to the motor, a first seal element connected to the bidirectional elastic element, and a third elastic element connected to the first seal element.

[0009] As described above, the micro gear pump with dual seals includes a first elastic element and a second elastic element for providing axial sealing, and a lubrication groove for reducing wear is provided between the first elastic element and the second elastic element.

[0010] As described above, the micro gear pump with double sealing 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.

[0011] As described above, the micro gear pump with dual seals includes an upper part for accommodating the primary sealing assembly and the secondary seal, and a lower part for accommodating the gear assembly.

[0012] As described above, the micro gear pump with double seals has a first positioning block for fixing the bidirectional elastic element, a second positioning block for fixing the first sealing element, and a second fixing groove for accommodating the third elastic element on the upper part of the pump cover.

[0013] As described above, the micro gear pump with double sealing is further provided with multiple overflow holes on the upper part of the pump cover to prevent contamination, and the overflow holes are connected to the second fixing groove.

[0014] As described above, the micro gear pump with double sealing has an inlet and an outlet at the bottom of the pump cover for connecting the flow space.

[0015] As described above, the micro gear pump with double seals includes a main gear connected to the motor and a driven gear meshing with the main gear.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention proposes a miniature gear pump with dual seals. First, a primary sealing component and a secondary sealing element are installed between the gear assembly and the motor to achieve a dual sealing effect, preventing liquid leakage from the pump body to the outside and preventing liquid from flowing into the motor. Second, the primary sealing component achieves a primary seal through the axial sealing effect of its bidirectional elastic element, the first sealing element, and the third elastic element. The bidirectional elastic element has a lubrication groove to improve lubrication and wear resistance. Third, the secondary sealing element is fitted onto the motor shaft to achieve a secondary seal, preventing liquid from entering the motor through the tiny gaps in the primary sealing component, thus protecting the motor.

[0018] This utility model features a micro gear pump with dual seals. It achieves efficient liquid delivery by driving a gear assembly with a motor. The dual sealing effect is achieved through a primary sealing assembly and a secondary sealing element, which can prevent liquid from leaking out of the pump body and also prevent liquid from flowing into the motor. This solves the problem that current single sealing structures cannot completely prevent liquid from flowing into the motor. [Attached Image Description]

[0019] Figure 1 The three-dimensional representation of this utility model Figure 1 ;

[0020] Figure 2 The three-dimensional representation of this utility model Figure 2 ;

[0021] Figure 3 for Figure 1 Enlarged diagram at point B

[0022] Figure 4 Partial breakdown of this utility model Figure 1 ;

[0023] Figure 5 Partial breakdown of this utility model Figure 2 ;

[0024] Figure 6 This is a top view of the present invention;

[0025] Figure 7 for Figure 6 Cross-sectional view at point AA;

[0026] Figure 8 for Figure 7 Enlarged view at point C;

[0027] Figure 9 for Figure 7 Enlarged view at point D;

[0028] Figure 10 for Figure 6 Cross-sectional view of the pump cover at point AA.

Detailed Implementation Methods

[0029] The following is in conjunction with the appendix Figure 1-9 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.

[0030] Figure 1-9 The miniature gear pump shown has a double seal, including a pump body 2 connected to a motor 1 and a gear assembly 3 disposed inside the pump body 2. A primary sealing assembly 4 for preventing liquid leakage and a secondary sealing element 5 for protecting the motor are provided between the gear assembly 3 and the motor 1.

[0031] Specifically, the motor 1 is provided with a motor shaft 11 for connecting the pump body 2, the gear assembly 3, the primary sealing assembly 4 and the secondary sealing element 5.

[0032] In this embodiment, the pump body, as the main component of the micro gear pump, achieves efficient liquid transportation by driving the gear assembly within the pump body via a motor. A dual sealing effect is achieved by setting a primary sealing component and a secondary sealing element between the gear assembly and the motor. This prevents liquid from leaking out of the pump body and also prevents liquid from entering the motor through the tiny gaps in the primary sealing component.

[0033] Furthermore, the motor 1 is provided with a first fixing groove 12 for connection, and the secondary sealing element 5 is sleeved on the first fixing groove 12.

[0034] In this implementation, a secondary seal is fitted onto the motor shaft to form a physical barrier, isolating the motor from potentially leaking liquids and achieving a secondary seal. This prevents liquids from entering the motor through the tiny gaps in the primary seal assembly, which could damage the motor, while also providing waterproofing and oil protection.

[0035] Furthermore, the primary sealing assembly 4 includes a bidirectional elastic member 41 connected to the motor 1, a first sealing member 42 connected to the bidirectional elastic member 41, and a third elastic member 43 connected to the first sealing member 42.

[0036] In this implementation, a primary sealing structure is formed by a bidirectional elastic element, a first seal, and a third elastic element. Specifically, the bidirectional elastic element provides axial sealing, adapting to minute displacements between the motor shaft and gear assembly through elastic deformation to ensure a tight seal. The first seal acts as the primary sealing barrier, preventing liquid leakage. The third elastic element provides additional elastic support, enhancing the structural reliability of the primary sealing assembly.

[0037] Furthermore, the bidirectional elastic member 41 includes a first elastic member 411 and a second elastic member 412 for providing an axial seal, and a lubrication groove 413 for reducing wear is provided between the first elastic member 411 and the second elastic member 412.

[0038] Specifically, both the first elastic element 411 and the second elastic element 412 are lug tension springs, which have high elasticity and fatigue resistance, and can provide stable axial sealing force. The lubrication groove 413 is an annular groove that can store an appropriate amount of lubricating oil and reduce friction between the elastic elements.

[0039] In this embodiment, a dual axial seal is provided by the first elastic element and the second elastic element. By optimizing the structural layout, a lubrication groove is set between the first elastic element and the second elastic element to provide lubrication function, so that the bidirectional elastic element can achieve the best sealing and lubrication effect in a limited space.

[0040] 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 3 form a flow space 6 for liquid circulation.

[0041] Furthermore, the pump cover 21 includes an upper part 200 for accommodating the primary sealing assembly 4 and the secondary sealing member 5, and a lower part 300 for accommodating the gear assembly 4.

[0042] In this implementation, by optimizing the internal spatial structure of the pump, the primary sealing assembly and the secondary seal are formed into a centralized sealing area, enhancing the sealing effect. Simultaneously, independent and stable support structures are provided for both the primary sealing assembly and the gear assembly, ensuring their correct positioning and normal operation within the pump body.

[0043] Furthermore, the upper part 200 of the pump cover is provided with a first positioning block 201 for fixing the bidirectional elastic member 41, a second positioning block 202 for fixing the first sealing member 42, and a second fixing groove 203 for accommodating the third elastic member 43.

[0044] In this implementation, by setting a special positioning block and fixing groove in the upper part of the pump cover, the modular assembly of the primary sealing component is realized, ensuring the precise positioning of the bidirectional elastic element, the first sealing element and the third elastic element.

[0045] Furthermore, the upper part 200 of the pump cover is also provided with a plurality of overflow holes 204 for preventing pollution, and the overflow holes 204 are connected to the second fixing groove 203.

[0046] In this implementation, the overflow holes are evenly distributed on the upper part of the pump cover, which can promptly discharge excess liquid, prevent liquid accumulation, and prevent liquid from corroding and damaging the sealing components, thereby extending the service life of the sealing components and improving the reliability of the pump. Secondly, the second fixing groove is designed as a groove that matches the shape of the third elastic element. It can not only fix the third elastic element, but also connect multiple overflow holes to discharge liquid in a timely manner, realizing multi-functional integration.

[0047] Furthermore, the lower part 300 of the pump cover is provided with an inlet 23 and an outlet 24 for connecting the flow space 6.

[0048] 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.

[0049] Furthermore, the gear assembly 3 includes a main gear 31 connected to the motor 1 and a driven gear 32 meshing with the main gear 31.

[0050] 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.

[0051] This utility model features a micro gear pump with dual seals. It achieves efficient liquid transfer by driving a gear assembly with a motor. The dual sealing effect is achieved through a primary sealing assembly and a secondary sealing element, which can prevent liquid from leaking out of the pump body and also prevent liquid from flowing into the motor. This solves the problem that current single sealing structures cannot completely prevent liquid from flowing into the motor.

[0052] 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 double seals, comprising a pump body (2) connected to a motor (1) and a gear assembly (3) disposed within the pump body (2), characterized in that: A primary sealing assembly (4) for preventing liquid leakage and a secondary sealing element (5) for protecting the motor are provided between the gear assembly (3) and the motor (1). The primary sealing assembly (4) includes a bidirectional elastic element (41) connected to the motor (1), a first sealing element (42) connected to the bidirectional elastic element (41), and a third elastic element (43) connected to the first sealing element (42).

2. The dual seal micro-geared pump of claim 1, wherein: The motor (1) is provided with a first fixing groove (12) for connection, and the secondary sealing element (5) is sleeved on the first fixing groove (12).

3. The dual seal micro-geared pump of claim 1, wherein: The bidirectional elastic element (41) includes a first elastic element (411) and a second elastic element (412) for providing axial sealing, and a lubrication groove (413) for reducing wear is provided between the first elastic element (411) and the second elastic element (412).

4. The double sealed micro-geared pump of claim 1, wherein: 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 (3) form a flow space (6) for liquid flow.

5. The dual seal micro-geared pump of claim 4, wherein: The pump cover (21) includes an upper part (200) for accommodating the primary sealing assembly (4) and the secondary sealing element (5) and a lower part (300) for accommodating the gear assembly (3).

6. The double sealed micro-geared pump of claim 5, wherein: The upper part (200) of the pump cover is provided with a first positioning block (201) for fixing the bidirectional elastic member (41), a second positioning block (202) for fixing the first sealing member (42), and a second fixing groove (203) for accommodating the third elastic member (43).

7. The double sealed micro-geared pump of claim 6, wherein: The upper part (200) of the pump cover is also provided with a plurality of overflow holes (204) for preventing pollution, and the overflow holes (204) are connected to the second fixing groove (203).

8. The miniature gear pump with double seal according to claim 5, characterized in that: The lower part (300) of the pump cover is provided with an inlet (23) and an outlet (24) for connecting the flow space (6).

9. The double sealed micro-geared pump of claim 1, wherein: The gear assembly (3) includes a main gear (31) connected to the motor (1) and a driven gear (32) meshing with the main gear (31).

Images