Impact-resistant shock-resistant micro gear pump

Abstract

The utility model discloses an impact resistance and shock resistance micro gear pump, it includes the pump body, the inside fixed mounting of pump body has two symmetrical settings bearing, the inside of pump body is connected with the cover plate, the inside of two bearings is provided with first axle body and second axle body respectively, the outside fixed connection of first axle body has driving gear, the outside fixed connection of second axle body has driven gear, the inside rotatory connection of pump body has the disc body, the inside fixed connection of pump body has the locating rack through the embedding groove, the inside fixed connection of locating rack has elastic part. Through above -mentioned structure, the dynamic sealing surface is formed between disc body and pump body, when liquid reverse flow, will push disc body, is blocked to disc body through the stepped flow channel, thereby makes disc body passageway to carry out the capping, thereby can reduce the reflux phenomenon of liquid, in addition through locating rack, elastic part and buffer pad piece can provide the buffer, reduce the vibration transmission of pump body.

Description

Technical Field

[0001] This utility model relates to the field of gear pump technology, and in particular to an impact-resistant and vibration-resistant micro gear pump. Background Technology

[0002] The shock-resistant and vibration-resistant miniature gear pump is a small gear pump with good shock and vibration resistance. This pump is widely used in fields requiring high reliability and durability, such as aerospace, automotive, pharmaceutical, and chemical industries. For example, a miniature gear pump disclosed in Chinese patent application number CN01213137.7 features a simple structure, good sealing performance, and automatic overload pressure relief protection. However, backflow is prone to occur during liquid transportation, and the overall structure's buffering effect is insufficient, exacerbating bearing loads and easily inducing resonance during high-speed operation, thus affecting the transmission mechanism. Utility Model Content

[0003] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide an impact-resistant and vibration-resistant micro gear pump. A dynamic sealing surface is formed between the disc and the pump body. When the liquid flows in reverse, it will push the disc and block the disc through the stepped flow channel, thereby sealing the disc channel and reducing the backflow of liquid. In addition, the positioning frame, elastic element and buffer pad can provide buffering and reduce the vibration transmission of the pump body.

[0004] This utility model also provides a micro gear pump with the aforementioned impact and vibration resistance, comprising: a pump body, wherein two symmetrically arranged bearings are fixedly installed inside the pump body, a cover plate is engaged with the pump body, a first shaft and a second shaft are respectively arranged inside the two bearings, a driving gear is fixedly connected to the outside of the first shaft, and a driven gear is fixedly connected to the outside of the second shaft, the driven gear meshing with the driving gear; a disc is rotatably connected inside the pump body, an end rod is rotatably connected to the outside of the disc, a cylinder is slidably connected to the outside of the end rod, the bottom of the cylinder is rotatably connected to the pump body, a positioning frame is fixedly connected inside the pump body through a groove, and an elastic element is fixedly connected inside the positioning frame. A dynamic sealing surface is formed between the disc and the pump body. When the liquid flows in reverse, it pushes the disc, blocking the disc through the stepped flow channel, thereby sealing the disc channel and reducing liquid backflow. In addition, the positioning frame, elastic element, and buffer pad provide cushioning and reduce the vibration transmission of the pump body.

[0005] According to the impact-resistant and vibration-resistant micro gear pump of this utility model, a top cover is fixedly connected to the top of the pump body by fixing bolts, and the pump body and the top cover are tightly connected. The top cover is fixed by fixing bolts so that the top cover can be connected to the pump body.

[0006] According to the impact-resistant and vibration-resistant micro gear pump of this utility model, a spring is installed inside the cylinder. One end of the spring is fixedly connected to the cylinder, and the other end of the spring is fixedly connected to the end rod. The spring provides a reset force to the end rod, allowing the end rod to drive the disc to reset.

[0007] According to the impact-resistant and vibration-resistant micro gear pump of this utility model, a sealing gasket is embedded on the lower surface of the cover plate. The sealing gasket is located between the cover plate and the bearing, and the sealing gasket is tightly connected to the cover plate. The sealing gasket can prevent liquid leakage inside the pump body.

[0008] According to the impact-resistant and vibration-resistant micro gear pump of this utility model, the top cover is provided with an observation port, which is a double-layered hollow glass. The hollow layer can effectively block pump noise and improve the quietness of observation. The glass material is corrosion-resistant and facilitates observation of the internal gear operation.

[0009] According to the impact-resistant and vibration-resistant micro gear pump of this utility model, there are two symmetrical positioning frames located on both sides of the driving gear and the driven gear. The positioning frames provide a fixing effect on the elastic element and the buffer pad, making the overall structure more stable.

[0010] According to the impact-resistant and vibration-resistant micro gear pump of this utility model, buffer pads are fixedly connected to both sides of the positioning frame. The buffer pads are located on the side of the elastic element, and the outer surfaces of both the elastic element and the buffer pads are in contact with the pump body. The cooperation between the elastic element and the buffer pads can absorb vibration energy, thereby effectively suppressing high-frequency vibration of the gears.

[0011] According to the impact-resistant and vibration-resistant micro gear pump of this utility model, an inlet pipe is fixedly connected to one side of the pump body, and an outlet pipe is fixedly connected to the other side of the pump body. The inlet pipe and the outlet pipe are respectively fixed to both sides of the pump body, forming a straight flow channel to reduce fluid resistance.

[0012] Beneficial effects: Compared with existing technologies, this new type of impact-resistant and vibration-resistant micro gear pump forms a dynamic sealing surface between the disc and the pump body. When the liquid flows in reverse, it pushes the disc and blocks the disc through the stepped flow channel, thereby sealing the disc channel and reducing the backflow of liquid. In addition, the positioning frame, elastic element and buffer pad can provide buffering and reduce the vibration transmission of the pump body. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a complete structural diagram of the impact-resistant and vibration-resistant micro gear pump of this utility model; Figure 2This is a cross-sectional view of the impact-resistant and vibration-resistant micro gear pump of this utility model; Figure 3 This is an exploded structural diagram of the impact-resistant and vibration-resistant micro gear pump of this utility model; Figure 4 This is a structural diagram of the anti-backflow mechanism of the impact-resistant and vibration-resistant micro gear pump of this utility model; Figure 5 This is a structural diagram of the end rod and cylinder of the impact-resistant and vibration-resistant micro gear pump of this utility model; Figure 6 This is a structural diagram of the buffer mechanism of the impact-resistant and vibration-resistant micro gear pump of this utility model.

[0014] Legend: 1. Pump body; 2. Bearing; 3. Cover plate; 4. First shaft; 5. Second shaft; 6. Drive gear; 7. Driven gear; 8. Disc; 9. End rod; 10. Cylinder; 11. Groove; 12. Positioning frame; 13. Elastic element; 14. Fixing bolt; 15. Top cover; 16. Spring; 17. Sealing gasket; 18. Observation port; 19. Buffer pad; 20. Inlet pipe; 21. Outlet pipe. Detailed Implementation

[0015] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0016] Reference Figure 1-6 This utility model discloses an impact-resistant and vibration-resistant micro gear pump, comprising: a pump body 1; a top cover 15 fixedly connected to the top of the pump body 1 by fixing bolts 14; the pump body 1 and the top cover 15 being tightly connected; two symmetrically arranged bearings 2 fixedly installed inside the pump body 1; a cover plate 3 engagingly connected inside the pump body 1; a sealing gasket 17 embedded on the lower surface of the cover plate 3; the sealing gasket 17 being located between the cover plate 3 and the bearings 2; and the sealing gasket 17 being tightly connected to the cover plate 3. Between the cover plate 3 and the bearing 2, the sealing gasket 17 is tightly connected to the cover plate 3. The two bearings 2 are respectively provided with a first shaft 4 and a second shaft 5. The first shaft 4 is fixedly connected to the outside of the drive gear 6, and the second shaft 5 is fixedly connected to the outside of the driven gear 7. The driven gear 7 is meshed with the drive gear 6. The top cover 15 is provided with an observation port 18, which is a double-layer hollow glass. One side of the pump body 1 is fixedly connected to the inlet pipe 20, and the other side of the pump body 1 is fixedly connected to the outlet pipe 21. Specifically, the top of the pump body 1 is sealed by the top cover 15, and the cover plate 3 and the pump body 1 are fitted with the sealing gasket 17 to form a double sealing barrier, which can prevent pressure pulsation caused by high pressure fluid leakage. In addition, the bearing 2 can reduce the wear generated when the first shaft 4 and the second shaft 5 rotate. The internal liquid condition can be viewed through the observation port 18. The inlet pipe 20 and the outlet pipe 21 are fixed on both sides of the pump body 1 respectively to form a straight flow channel to reduce fluid resistance. The pump body 1 is rotatably connected to a disc 8 inside, and an end rod 9 is rotatably connected to the outside of the disc 8. A cylinder 10 is slidably connected to the outside of the end rod 9. A spring 16 is installed inside the cylinder 10. One end of the spring 16 is fixedly connected to the cylinder 10, and the other end of the spring 16 is fixedly connected to the end rod 9. The bottom of the cylinder 10 is rotatably connected to the pump body 1. A positioning frame 12 is fixedly connected inside the pump body 1 through a groove 11. An elastic element 13 is fixedly connected inside the positioning frame 12. Specifically, a dynamic sealing surface is formed between the disc body 8 and the pump body 1. When the liquid flows in the reverse direction, it will push the disc body 8 and block the disc body 8 through the stepped flow channel, thereby blocking the channel of the disc body 8 and reducing the backflow of the liquid. When the liquid flows in the forward direction, the liquid can push the disc body 8 outward, thereby opening the channel of the inlet pipe 20.

[0017] There are two symmetrical positioning frames 12, which are located on both sides of the driving gear 6 and the driven gear 7. Buffer pads 19 are fixedly connected to both sides of the positioning frames 12. The buffer pads 19 are located on the side of the elastic member 13. The outer surfaces of the elastic member 13 and the buffer pads 19 are in contact with the pump body 1.

[0018] Specifically, the elastic element 13 and the buffer pad 19 are fixed by the positioning frame 12. The elastic element 13 and the buffer pad 19 are arranged side by side to form a composite shock absorption structure. When subjected to external impact, the buffer pad 19 absorbs the instantaneous impact energy through elastic deformation, while the elastic element 13 provides continuous rebound force. The two work together to effectively reduce vibration transmission.

[0019] Working principle: First, the top of the pump body 1 is sealed by the top cover 15. The cover plate 3 is connected to the pump body 1 and cooperates with the sealing gasket 17 to form a double sealing barrier, which can prevent pressure pulsation caused by high pressure fluid leakage. The bearing 2 can reduce rotational friction, which can facilitate the stable operation of the first shaft 4 and the second shaft 5 under the drive of the driving gear 6 and the driven gear 7. The disc 8 and the pump body 1 form a dynamic sealing surface. When the liquid flows in reverse, it will push the disc 8 and block the disc 8 through the stepped flow channel, thereby blocking the channel of the disc 8 and reducing the backflow of liquid. When the liquid flows in the forward direction, the liquid can push the disc 8 outward, thereby opening the channel of the inlet pipe 20. In addition, when the transmission mechanism is operating, the elastic element 13 and the buffer pad 19 are fixed by the positioning frame 12. The buffer pad 19 cooperates with the elastic element 13 to absorb the energy of vibration, thereby reducing the vibration transmission of the pump body 1.

[0020] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An impact-resistant and vibration-resistant miniature gear pump, characterized in that, include: The pump body (1) has two symmetrically arranged bearings (2) fixedly installed inside. The pump body (1) has a cover plate (3) snapped into it. The two bearings (2) have a first shaft (4) and a second shaft (5) respectively installed inside. The first shaft (4) has a driving gear (6) fixedly connected to its exterior. The second shaft (5) has a driven gear (7) fixedly connected to its exterior. The driven gear (7) meshes with the driving gear (6). The pump body (1) is rotatably connected to a disc (8) inside, and an end rod (9) is rotatably connected to the outside of the disc (8). A cylinder (10) is slidably connected to the outside of the end rod (9). The bottom of the cylinder (10) is rotatably connected to the pump body (1). A positioning frame (12) is fixedly connected to the inside of the pump body (1) through a groove (11). An elastic element (13) is fixedly connected to the inside of the positioning frame (12).

2. The impact-resistant and vibration-resistant micro gear pump according to claim 1, characterized in that, The top of the pump body (1) is fixedly connected to the top cover (15) by fixing bolts (14), and the pump body (1) and the top cover (15) are tightly connected.

3. The impact-resistant and vibration-resistant micro gear pump according to claim 1, characterized in that, A spring (16) is provided inside the cylinder (10). One end of the spring (16) is fixedly connected to the cylinder (10), and the other end of the spring (16) is fixedly connected to the end rod (9).

4. The impact-resistant and vibration-resistant micro gear pump according to claim 1, characterized in that, A sealing gasket (17) is fitted on the lower surface of the cover plate (3). The sealing gasket (17) is located between the cover plate (3) and the bearing (2). The sealing gasket (17) is tightly connected to the cover plate (3).

5. The impact-resistant and vibration-resistant micro gear pump according to claim 2, characterized in that, The top cover (15) is provided with an observation port (18) on the outside, and the observation port (18) is a double-layer hollow glass.

6. The impact-resistant and vibration-resistant micro gear pump according to claim 1, characterized in that, There are two positioning frames (12) that are symmetrically arranged, and the two positioning frames (12) are located on both sides of the driving gear (6) and the driven gear (7).

7. The impact-resistant and vibration-resistant micro gear pump according to claim 1, characterized in that, Both sides of the positioning frame (12) are fixedly connected with buffer pads (19), the buffer pads (19) are located on the side of the elastic element (13), and the exterior of the elastic element (13) and the buffer pads (19) are in contact with the pump body (1).

8. The impact-resistant and vibration-resistant micro gear pump according to claim 1, characterized in that, One side of the pump body (1) is fixedly connected to an inlet pipe (20), and the other side of the pump body (1) is fixedly connected to an outlet pipe (21).

Images