A gear pump for small flow rate thick fluid

Abstract

This utility model discloses a small-flow-rate gear pump for viscous fluids, specifically relating to the field of gear pump technology. It includes a rotating mechanism, a delivery mechanism, and a connecting assembly. The outer diameter surface of the rotating mechanism is provided with the connecting assembly, and the side of the connecting assembly is provided with the delivery mechanism. By employing a self-designed gear, which optimizes key parameters such as tooth profile and module, the pump significantly enhances its ability to grip and push viscous fluids. Simultaneously, the carefully improved inlet and outlet fluid channels effectively reduce fluid flow resistance and fluid flow loss within the pump. The synergistic effect of these two design features enables the pump to achieve the same high-viscosity fluid filling effect as large-displacement gear pumps on the market, despite its small displacement, thus greatly improving the efficiency of conveying high-viscosity fluids.

Description

Technical Field

[0001] This utility model relates to the field of gear pump technology, and more specifically, to a gear pump for small flow rate viscous fluid. Background Technology

[0002] Currently, gear pumps on the market are used for filling solutions with a viscosity below 3000 OCP. If used to fill fluids with a viscosity above 3000 OCP, the gear pump may jam or the gears may mesh too tightly, resulting in a very low flow rate. In such cases, a large-displacement gear pump is required to fill small flow rates to meet the requirements. Through long-term practice and verification, our company has designed gears with a different module, number of teeth, and gear shape than those commonly found on the market. This increases the inter-tooth volume and improves gear transmission efficiency. Furthermore, we have optimized the pump body flow channel, shortening the path within the pump body and further improving the transmission efficiency of viscous fluids within the pump.

[0003] A search revealed that publication number CN102465873A discloses a self-lubricating gear pump, including a pump housing with a pair of meshing gears inside. One side of the pump housing has an oil inlet, and the other side has an oil outlet. Two end covers are fitted onto the pump housing to mate with the end faces of the gears. The gear shafts are mounted in bearing seats on the end covers via bearings. The shaft of the driving gear passes through either end cover and is connected to a drive mechanism. Unloading ports are provided at corresponding meshing positions of the two gears. These unloading ports are connected to the inner side of the bearing seats via an oil groove. An external oil pipe connects the inner cavity of the bearing seats to the oil inlet. When this device is working, oil in the oil-trapping area can be squeezed from the oil groove into the bearing seats, pass through the bearings, and then enter the suction port through the external oil pipe. This solves the lubrication problem of the bearings and the oil-trapping problem of the gear pump, resulting in a longer service life and lower operating noise. The inventors discovered the following problems with the existing technology during the development of this utility model:

[0004] Existing gear pumps have many drawbacks when handling viscous fluids with a viscosity greater than 3000 OCP. For such fluids, large-displacement pumps are often required to complete the filling process. This not only results in large and heavy equipment, which limits installation space and increases transportation costs, but also keeps the production material costs high. At the same time, due to the lack of optimization in gear design and fluid channels, the fluid flow resistance is high, the losses are high, the conveying efficiency is low, and the energy consumption is correspondingly high. In addition, the large and complex structure makes the equipment difficult to maintain and requires frequent maintenance, making it difficult to meet the needs of small-space operation scenarios. Overall, the operating cost is high and the flexibility is insufficient.

[0005] Therefore, a small-flow-rate gear pump for viscous fluids is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a small flow rate gear pump for viscous fluids to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a small flow rate gear pump for viscous fluids, comprising a rotating mechanism, a delivery mechanism, and a connecting assembly, wherein the connecting assembly is provided on the outer diameter surface of the rotating mechanism, and the delivery mechanism is provided on the side of the connecting assembly.

[0008] Preferably, the rotating mechanism includes a drive assembly, a rear assembly, and an internal hex screw, and the rear assembly is provided on the outer diameter surface of the drive assembly, and the internal hex screw is mounted on the side of the rear assembly.

[0009] Preferably, the drive assembly includes a motor, a mounting bracket, and a rotating shaft, with the mounting bracket mounted below the motor and the rotating shaft mounted on the side of the motor.

[0010] Preferably, the rear end assembly includes a rear end cover, a skeleton seal, and a first O-ring, wherein the skeleton seal is installed on the side of the rear end cover, and the first O-ring is installed on the side of the rear end cover away from the skeleton seal.

[0011] Preferably, the infusion mechanism includes a transmission component, a front end component, and a housing, wherein the transmission component is disposed on the upper part of the inner wall of the housing, and the front end component is mounted on the side of the transmission component.

[0012] Preferably, the transmission assembly includes a driving wheel, a driven wheel, and a first cylindrical pin, and the driven wheel is disposed below the driving wheel, and the first cylindrical pin is mounted on the inner diameter surface of the driven wheel.

[0013] Preferably, the front end assembly includes a front end cover, a cylindrical head screw, and a bushing, and the bushing is provided on the side of the front end cover, and the cylindrical head screw is installed on the side of the front end cover away from the bushing.

[0014] Preferably, the connecting assembly includes a second O-ring, a flat washer, and a second cylindrical pin, wherein the flat washer is provided on the side of the second O-ring, and the second cylindrical pin is installed on the side of the second O-ring away from the flat washer.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. Compared with existing technologies, this small-flow viscous fluid gear pump adopts a self-designed gear with optimized key parameters such as tooth profile and module, which significantly enhances the gear's gripping and pushing ability for viscous fluids. At the same time, the carefully improved inlet and outlet fluid channels effectively reduce fluid flow resistance and fluid flow loss in the pump. The synergistic effect of these two factors enables the pump to achieve the same high-viscosity fluid filling effect as large-displacement gear pumps on the market with a small displacement, greatly improving the conveying efficiency of high-viscosity fluids.

[0017] 2. Compared with existing technologies, this type of small-flow viscous fluid gear pump adopts a small displacement design and a compact structural layout, which greatly reduces the pump's size and weight, effectively reducing production material costs, transportation costs, and installation space costs. In addition, the small displacement design combined with efficient fluid handling capabilities reduces equipment energy consumption, further saving operating costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model.

[0019] Figure 2 This is a three-dimensional structural diagram of the connecting component of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the infusion mechanism of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the rotating mechanism of this utility model.

[0022] Figure 5 This is a side view sectional structural diagram of the transmission component of this utility model.

[0023] The attached figures are labeled as follows: 1. Rotating mechanism; 2. Infusion mechanism; 3. Connecting assembly; 4. Drive assembly; 5. Rear end assembly; 6. Socket head screw; 7. Motor; 8. Mounting bracket; 9. Shaft; 10. Rear end cover; 11. Skeleton seal; 12. First O-ring; 13. Transmission assembly; 14. Front end assembly; 15. Housing; 16. Drive wheel; 17. Driven wheel; 18. First cylindrical pin; 19. Front end cover; 20. Cylindrical head screw; 21. Bushing; 22. Second O-ring; 23. Flat washer; 24. Second cylindrical pin. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] As attached Figures 1 to 5 The small flow rate gear pump for thick fluid shown includes a rotating mechanism 1, a delivery mechanism 2, and a connecting assembly 3. The connecting assembly 3 is provided on the outer diameter surface of the rotating mechanism 1, and the delivery mechanism 2 is provided on the side of the connecting assembly 3.

[0027] Specifically: When a gear pump is needed to transport viscous fluids, the operator needs to connect the storage tank containing the viscous fluid to the gear pump interface, and then start the rotating mechanism 1. The rotating mechanism 1 drives the infusion mechanism 2 to rotate, drawing the viscous fluid into the infusion mechanism 2. Because the sealed chamber gradually decreases at the outlet of the infusion mechanism 2, the fluid is squeezed and discharged, achieving continuous delivery of the viscous fluid. The connecting component 3 not only ensures the tightness of the connection and prevents fluid leakage, but also effectively transmits power, allowing the power of the rotating mechanism 1 to be smoothly transmitted to the infusion mechanism 2.

[0028] Example 2

[0029] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 5 As shown below, see details:

[0030] In a preferred embodiment, the rotating mechanism 1 includes a drive assembly 4, a rear assembly 5, and an internal hex screw 6. The rear assembly 5 is provided on the outer diameter surface of the drive assembly 4, and the internal hex screw 6 is installed on the side of the rear assembly 5. The drive assembly 4 transmits power forward to the infusion mechanism 2, so that the infusion mechanism 2 draws in the concentrated fluid, while the rear assembly 5 provides a good seal for the gear pump to prevent the fluid from flowing out of the gear pump.

[0031] In a preferred embodiment, the drive assembly 4 includes a motor 7, a mounting bracket 8, and a rotating shaft 9. The mounting bracket 8 is mounted below the motor 7, and the rotating shaft 9 is mounted on the side of the motor 7. The motor 7 in the drive assembly 4 is securely mounted by the mounting bracket 8, and the operation of the motor 7 drives the rotating shaft 9 to rotate.

[0032] In a preferred embodiment, the rear end assembly 5 includes a rear end cover 10, a skeleton seal 11, and a first O-ring 12. The skeleton seal 11 is installed on the side of the rear end cover 10, and the first O-ring 12 is installed on the side of the rear end cover 10 away from the skeleton seal 11. The rotating shaft 9 is connected to the rear end cover 10 in the rear end assembly 5. The skeleton seal 11 and the first O-ring 12 play a sealing role to prevent fluid leakage and the entry of external impurities, and ensure the stability of power transmission.

[0033] In a preferred embodiment, the infusion mechanism 2 includes a transmission assembly 13, a front end assembly 14, and a housing 15. The transmission assembly 13 is disposed on the upper part of the inner wall of the housing 15, and the front end assembly 14 is mounted on the side of the transmission assembly 13. The transmission assembly 13 rotates by the power provided by the drive assembly 4 to draw viscous fluid into the sealed chamber, while the front end assembly 14 can support and protect the transmission assembly 13. The housing 15 provides a space for the transmission assembly 13.

[0034] In a preferred embodiment, the transmission assembly 13 includes a driving wheel 16, a driven wheel 17, and a first cylindrical pin 18. The driven wheel 17 is disposed below the driving wheel 16, and the first cylindrical pin 18 is mounted on the inner diameter surface of the driven wheel 17. In the transmission assembly 13, the driving wheel 16 is connected to the rotating shaft 9. Driven by the rotating shaft 9, the driving wheel 16 rotates, and drives the driven wheel 17 mounted on the first cylindrical pin 18 to rotate through meshing. A sealed chamber is formed between the driving wheel 16 and the driven wheel 17. As the gear rotates, the sealed chamber gradually increases at the pump inlet, forming a negative pressure, which draws the viscous fluid into the housing 15. At the outlet, the sealed chamber gradually decreases, squeezing the fluid and discharging it, thereby realizing the continuous delivery of the viscous fluid.

[0035] In a preferred embodiment, the front end assembly 14 includes a front end cover 19, a cylindrical head screw 20, and a bushing 21. The bushing 21 is provided on the side of the front end cover 19, and the cylindrical head screw 20 is installed on the side of the front end cover 19 away from the bushing 21. The front end cover 19, bushing 21, and cylindrical head screw 20 in the front end assembly 14 serve to support and fix the transmission assembly 13, ensuring the accuracy and stability of the gear transmission.

[0036] In a preferred embodiment, the connecting assembly 3 includes a second O-ring 22, a flat washer 23, and a second cylindrical pin 24. The flat washer 23 is provided on the side of the second O-ring 22, and the second cylindrical pin 24 is installed on the side of the second O-ring 22 away from the flat washer 23. The connecting assembly 3 reliably connects the rotating mechanism 1 and the infusion mechanism 2. The second O-ring 22, the flat washer 23, and the second cylindrical pin 24 work together to not only ensure the tightness of the connection and prevent fluid leakage, but also effectively transmit power, so that the power of the rotating mechanism 1 is smoothly transmitted to the infusion mechanism 2.

[0037] The working process of this utility model is as follows: First, when the small flow viscous fluid gear pump is started, the mounting bracket 8 firmly supports the motor 7. The motor 7 drives the rotating shaft 9 to rotate, thereby generating power for the drive assembly 4. In the rear assembly 5, the rotating shaft 9 is connected to the rear cover 10. The skeleton seal 11 and the first O-ring 12 form a seal to prevent fluid leakage and impurity intrusion, ensuring stable power transmission. The second O-ring 22, flat washer 23 and second cylindrical pin 24 in the connecting assembly 3 tightly connect the rotating mechanism 1 and the infusion mechanism 2, ensuring that the power is smoothly transmitted to the infusion mechanism 2.

[0038] Inside the infusion mechanism 2, the rotating shaft 9 drives the drive wheel 16 of the transmission assembly 13 to rotate. The drive wheel 16 drives the driven wheel 17 mounted on the first cylindrical pin 18 to rotate through meshing. The drive wheel 16 and the driven wheel 17 form a sealed chamber in the housing 15. As the gear rotates, the sealed chamber at the inlet increases to form a negative pressure, drawing in viscous fluid. The sealed chamber at the outlet decreases to compress the fluid, achieving continuous delivery. At the same time, the front cover 19, the cylindrical head screw 20, and the bushing 21 of the front end assembly 14 provide support and fixation for the transmission assembly 13, ensuring the precision and stability of the gear transmission. This enables the entire gear pump to efficiently complete the delivery of viscous fluid. The above is the working principle of this small-flow viscous fluid gear pump.

Claims

1. A low flow, high viscosity fluid gear pump comprising a rotating mechanism (1), a fluid delivery mechanism (2) and a connecting assembly (3), characterised in that: The outer diameter surface of the rotating mechanism (1) is provided with a connecting component (3), and the side of the connecting component (3) is provided with an infusion mechanism (2).

2. A low flow, high viscosity fluid gear pump as claimed in claim 1, wherein: The rotating mechanism (1) includes a drive assembly (4), a rear assembly (5) and an internal hex screw (6), and the outer diameter surface of the drive assembly (4) is provided with the rear assembly (5), and the side of the rear assembly (5) is equipped with the internal hex screw (6).

3. A low flow, high viscosity fluid gear pump as claimed in claim 2, wherein: The drive assembly (4) includes a motor (7), a mounting bracket (8) and a rotating shaft (9), with the mounting bracket (8) mounted below the motor (7) and the rotating shaft (9) mounted on the side of the motor (7).

4. A low flow, high viscosity fluid gear pump as claimed in claim 2, wherein: The rear end assembly (5) includes a rear end cover (10), a skeleton seal (11) and a first O-ring (12), and the skeleton seal (11) is installed on the side of the rear end cover (10), and the first O-ring (12) is installed on the side of the rear end cover (10) away from the skeleton seal (11).

5. A small-flow-rate gear pump for viscous fluids according to claim 1, characterized in that: The infusion mechanism (2) includes a transmission assembly (13), a front end assembly (14) and a housing (15), and the transmission assembly (13) is disposed on the upper part of the inner wall of the housing (15), and the front end assembly (14) is mounted on the side of the transmission assembly (13).

6. A low flow, high viscosity fluid gear pump as claimed in claim 5, wherein: The transmission assembly (13) includes a driving wheel (16), a driven wheel (17) and a first cylindrical pin (18), and the driven wheel (17) is disposed below the driving wheel (16), and the first cylindrical pin (18) is mounted on the inner diameter surface of the driven wheel (17).

7. A low flow, high viscosity fluid gear pump as claimed in claim 5 wherein: The front end assembly (14) includes a front end cover (19), a cylindrical head screw (20) and a bushing (21), and the bushing (21) is provided on the side of the front end cover (19), and the cylindrical head screw (20) is installed on the side of the front end cover (19) away from the bushing (21).

8. A low flow, high viscosity fluid gear pump as claimed in claim 1, wherein: The connecting assembly (3) includes a second O-ring (22), a flat washer (23) and a second cylindrical pin (24), and the flat washer (23) is provided on the side of the second O-ring (22), and the second cylindrical pin (24) is installed on the side of the second O-ring (22) away from the flat washer (23).

Images