Miniature gear pump with split type mechanical seal

Abstract

According to the miniature gear pump with the split type mechanical seal, the pump body is driven by the motor to be matched with the gear assembly, a liquid flowing space is formed, accurate conveying of liquid is achieved, and through the split type design of the movable ring assembly and the design of a multi-layer sealing structure between the movable ring and the static ring, the sealing effect is good. And a sealing water film with an excellent effect is formed between the two sealing structures, so that the problem of insufficient sealing performance of the traditional sealing structure of the micro gear pump at present 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 a split mechanical seal. [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] However, the sealing structure of traditional micro gear pumps typically uses a sealed oil seal, which can limit its sealing effect under extreme operating conditions. For example, at high speeds, the linear contact zone between the oil seal lip and the shaft can be subjected to centrifugal force, potentially leading to oil film rupture and seal failure; under high pressure differentials, the oil film between the oil seal lip and the shaft can be deformed by pressure, potentially leading to oil film rupture and seal failure. [Utility Model Content]

[0004] The purpose of this invention is to provide a micro gear pump with a split mechanical seal, thereby solving the problem of insufficient sealing performance of the current traditional micro gear pump sealing structure.

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

[0006] A miniature gear pump with a split mechanical seal includes a pump body connected to a motor and a gear assembly disposed within the pump body, wherein the pump body and the gear assembly form a flow space for liquid flow, characterized in that: the pump body is further provided with a split dynamic ring assembly and a stationary ring for preventing liquid leakage and fitted onto the motor.

[0007] As described above, in a miniature gear pump with a split mechanical seal, when the split dynamic ring assembly moves relative to the motor, the stationary ring remains stationary relative to the split dynamic ring assembly.

[0008] As described above, in a miniature gear pump with a split mechanical seal, the rotating ring assembly includes a first rotating ring, a second rotating ring, and a first elastic element for providing axial preload. The first rotating ring is connected to the second rotating ring via the first elastic element.

[0009] As described above, in the miniature gear pump with a split mechanical seal, a first gasket and a first sealing element are provided between the first rotating ring and the second rotating ring to improve the sealing effect.

[0010] As described above, in the miniature gear pump with a split mechanical seal, the first rotating ring is provided with a first connecting portion connected to the first gasket, and the second rotating ring is provided with a second connecting portion connected to the first seal.

[0011] As described above, in the miniature gear pump with a split mechanical seal, the first rotating ring, the second rotating ring, and the stationary ring are composed of graphite and synthetic resin materials.

[0012] As described above, in the miniature gear pump with a split mechanical seal, a second elastic element and a second gasket for reinforcing the stationary ring are provided between the rotating ring assembly and the stationary ring; a second sealing element for providing axial preload is provided between the stationary ring and the pump body.

[0013] As described above, in a miniature gear pump with a split mechanical seal, the stationary ring is provided with a third connecting portion that connects to the second gasket and the second seal.

[0014] As described above, the miniature gear pump with a split mechanical seal 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.

[0015] As described above, the miniature gear pump with a split mechanical seal includes an upper part for accommodating the split sealing structure and a lower part for accommodating the gear assembly; the lower part of the pump cover is provided with an inlet and an outlet for communicating with the flow space.

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

[0017] This invention proposes a miniature gear pump with a split-type mechanical seal. First, a motor drives a gear assembly within the pump body, causing the gears to mesh and rotate, thus changing the volume of the flow space and enabling liquid intake and discharge. Second, a split-type rotating ring assembly mounted on the motor, together with a stationary ring, forms a sealing structure, ensuring a tight seal between the motor and the pump body and preventing liquid leakage from the connection point. Specifically, the relative movement and friction between the split-type first and second rotating rings and the stationary ring create a sealing water film between them, effectively preventing liquid leakage and achieving excellent sealing performance.

[0018] This utility model relates to a micro gear pump with a split mechanical seal. The pump body and gear assembly are driven by a motor to form a liquid flow space, thereby achieving precise liquid delivery. Through the split design of the rotating ring assembly and the multi-layer sealing structure between the rotating and stationary rings, a high-performance sealing water film is formed between them, solving the problem of insufficient sealing performance of the current traditional micro gear pump sealing structure. [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 This is a partial exploded view of the present invention;

[0022] Figure 4 This is a top view of the present invention;

[0023] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0024] Figure 6 for Figure 5 Enlarged view of point B;

[0025] Figure 7 for Figure 5 Enlarged view of point C.

Detailed Implementation Methods

[0026] The following is in conjunction with the appendix Figure 1-7 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.

[0027] Figure 1-7 The miniature gear pump shown has a split mechanical seal and includes a pump body 2 connected to a motor 1 and a gear assembly 3 disposed inside the pump body 2. The pump body 2 and the gear assembly 3 form a flow space 4 for liquid flow. It also has a split dynamic ring assembly 5 and a stationary ring 5 disposed on the motor 1 to prevent liquid leakage.

[0028] Specifically, the motor 1 is provided with a motor shaft 11 for connecting the pump body 2, the gear assembly 3 and the split-type sealing structure 5. 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.

[0029] 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 inside the pump body, causing the gears to mesh and rotate to change the volume of the flow space, thus achieving liquid intake and discharge. Furthermore, a separate dynamic ring assembly mounted on the motor forms a sealing structure with the stationary ring, ensuring the seal between the motor and the pump body and preventing liquid from leaking outwards from the connection point within the flow space.

[0030] Furthermore, when the split-type moving ring assembly 5 moves relative to the motor 1, the stationary ring 5 remains stationary relative to the split-type moving ring assembly 5.

[0031] In this implementation, the motor shaft drives the rotating ring assembly to rotate at high speed, causing it to rub against the relatively stationary stationary ring and form a sealing water film, which can effectively prevent liquid leakage and achieve excellent sealing effect.

[0032] Furthermore, the split-type rotating ring assembly 5 includes a first rotating ring 51, a second rotating ring 52, and a first elastic element 53 for providing axial preload. The first rotating ring 51 is connected to the second rotating ring 52 through the first elastic element 53.

[0033] Specifically, the first moving ring 51 is provided with a fixing block 512 connected to the second moving ring 52, and the second moving ring 52 is provided with a fixing groove 522 connected to the fixing block 512.

[0034] In this embodiment, during the movement of the first and second rotating rings, the first elastic element provides a continuous axial preload while automatically compensating for wear, ensuring that the first and second rotating rings can fit tightly against the stationary ring, thereby forming a tight and reliable sealing surface and preventing liquid leakage at the connection. Secondly, the rotating ring assembly adopts a split design, allowing each part to be maintained or replaced independently, reducing maintenance costs.

[0035] Furthermore, a first gasket 54 and a first sealing element 55 are provided between the first rotating ring 51 and the second rotating ring 52 to improve the sealing effect.

[0036] Specifically, the first sealing element 55 is an O-ring.

[0037] In this embodiment, an auxiliary sealing structure is formed between the first rotating ring and the second rotating ring by the first gasket and the first seal, increasing the sealing layer and more effectively preventing liquid leakage in the tiny gap between the rotating ring assembly and the stationary ring, thus ensuring the normal operation of the pump. Secondly, the arrangement of the first gasket and the first seal allows the axial preload provided by the first elastic element to be more evenly distributed on the first rotating ring and the second rotating ring, avoiding wear caused by excessive local pressure.

[0038] Furthermore, the first moving ring 51 is provided with a first connecting portion 511 connected to the first gasket 54, and the second moving ring 52 is provided with a second connecting portion 521 connected to the first sealing member 55.

[0039] In this embodiment, the first connecting part and the second connecting part ensure the position and function of the first gasket and the first seal in the rotating ring assembly, while making the first rotating ring, the first gasket, the first seal and the second rotating ring more tightly and firmly connected, improving the overall reliability and structural stability of the rotating ring assembly, and achieving the best sealing effect.

[0040] Furthermore, the first moving ring 51, the second moving ring 52, and the stationary ring 6 are composed of graphite and synthetic resin materials.

[0041] In this embodiment, graphite and synthetic resin materials exhibit excellent wear resistance, good chemical corrosion resistance, and thermal stability, enabling them to withstand long-term friction between the rotating and stationary rings, reducing wear, adapting to various liquid media, and maintaining stable performance under high or low temperature environments. Furthermore, graphite materials possess good self-lubricating properties, forming a lubricating film between the rotating and stationary rings, reducing frictional resistance, and lowering the operating temperature and energy consumption of the rotating ring assembly.

[0042] Furthermore, a second elastic element 7 and a second gasket 8 for reinforcing the stationary ring 6 are provided between the split-type dynamic ring assembly 5 and the stationary ring 6; a second sealing element 9 for providing axial preload is provided between the stationary ring 6 and the pump body 2.

[0043] Specifically, the second seal 9 is an O-ring.

[0044] In this embodiment, the second gasket and the second seal form a support structure between the rotating ring assembly and the stationary ring. This effectively reinforces the stationary ring, preventing displacement or deformation during operation. It also absorbs and reduces vibration and noise between the rotating ring assembly and the stationary ring, improving the pump's operational stability. Secondly, the second seal provides a continuous axial preload to the stationary ring, ensuring a tight connection between the stationary ring and the motor shaft, thereby enhancing the sealing effect of the water film formed by the rotating and stationary rings.

[0045] Furthermore, the stationary ring 6 is provided with a third connecting portion 61 that connects to the second gasket 8 and the second seal 9.

[0046] In this implementation, the design of the third connection part ensures a more secure connection between the second gasket, the second seal and the stationary ring, reduces wear on the surface of the stationary ring, and improves the overall reliability and structural stability of the stationary ring.

[0047] 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 4 for liquid circulation.

[0048] Furthermore, the pump cover 21 includes an upper part 211 for accommodating the split sealing structure 5 and a lower part 212 for accommodating the gear assembly 3; the lower part 212 is provided with an inlet 23 and an outlet 24 for communicating with the flow space 4.

[0049] Specifically, the upper part 211 of the pump cover is also provided with a plurality of overflow holes 213 for preventing contamination.

[0050] In this implementation, the internal modular design of the pump cover provides a stable support structure for the split dynamic ring assembly, stationary ring, and gear assembly, ensuring the correct position and normal operation of each component inside the pump body. Secondly, the inlet and outlet ports connect the internal flow space of the pump body, enabling liquid input and output, thus completing the liquid transport process.

[0051] This utility model relates to a micro gear pump with a split mechanical seal. The pump body and gear assembly are driven by a motor to form a liquid flow space, thereby achieving precise liquid delivery. Through the split design of the rotating ring assembly and the multi-layer sealing structure between the rotating and stationary rings, a high-performance sealing water film is formed between them, solving the problem of insufficient sealing performance of the current traditional micro gear pump sealing structure.

[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 a split mechanical seal, comprising a pump body (2) connected to a motor (1) and a gear assembly (3) disposed within the pump body (2), wherein the pump body (2) and the gear assembly (3) form a flow space (4) for liquid flow, characterized in that: The pump body (2) is also provided with a split dynamic ring assembly (5) and a stationary ring (6) for preventing liquid leakage and fitted onto the motor (1). The split-type rotating ring assembly (5) includes a first rotating ring (51), a second rotating ring (52), and a first elastic element (53) for providing axial preload. The first rotating ring (51) is connected to the second rotating ring (52) through the first elastic element (53).

2. The micro-geared pump with split mechanical seal according to claim 1, characterized in that: When the split-type moving ring assembly (5) moves relative to the motor (1), the stationary ring (6) remains stationary relative to the split-type moving ring assembly (5).

3. The micro-geared pump with split mechanical seal of claim 1, wherein: A first gasket (54) and a first sealing element (55) are provided between the first moving ring (51) and the second moving ring (52) to improve the sealing effect.

4. The micro-geared pump with split mechanical seal of claim 3, wherein: The first moving ring (51) is provided with a first connecting part (511) connected to the first gasket (54), and the second moving ring (52) is provided with a second connecting part (521) connected to the first seal (55).

5. The micro-geared pump with split mechanical seal of claim 1, wherein: The first moving ring (51), the second moving ring (52) and the stationary ring (6) are composed of graphite and synthetic resin materials.

6. The micro-geared pump with split mechanical seal of claim 1, wherein: The split-type dynamic ring assembly (5) and the stationary ring (6) are provided with a second elastic element (7) and a second gasket (8) for reinforcing the stationary ring (6); the stationary ring (6) and the pump body (2) are provided with a second sealing element (9) for providing axial preload.

7. The micropump with split mechanical seal of claim 6, wherein: The stationary ring (6) is provided with a third connecting part (61) that connects to the second gasket (8) and the second seal (9).

8. The micro-geared pump with split mechanical seal 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 (4) for liquid flow.

9. The micro-geared pump with split mechanical seal of claim 8, wherein: The pump cover (21) includes an upper part (211) for accommodating the split-type moving ring assembly (5) and a lower part (212) for accommodating the gear assembly (3); the lower part (212) is provided with an inlet (23) and an outlet (24) for communicating with the flow space (4).

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