Pump set special for low-rotating-speed protein purification
By employing a gear set structure driven by a low-speed servo motor in the plunger pump, the problem of plunger pump vibration under high pressure load is solved, achieving stable output of high-precision flow rate, which is suitable for high-end protein purification instruments.
Patent Information
- Application Number
- CN202423283098.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing plunger pumps are prone to vibration under high pressure loads, resulting in unstable flow rates. This makes it difficult to meet the high precision and low-speed, high-pressure requirements of protein purification instruments. Furthermore, traditional pulley structures generate noise and wear when rotating at low speeds.
The gear set structure driven by a low-speed servo motor achieves stable low-speed, high-pressure output through the meshing transmission of the first and second gears. Combined with a high-precision servo motor, it ensures the accuracy and stability of the flow rate.
It achieves stability of high-pressure output and accuracy of flow rate at low-speed rotation, reduces vibration and noise, is suitable for high-end protein purification instruments, and improves flow rate accuracy and equipment durability.
Smart Images
Figure CN223498117U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plunger pump technology, specifically a pump set for low-speed protein purification. Background Technology
[0002] Plunger pumps, as mainstream power supply devices, are frequently used in various machines. However, high-precision, constant-pressure / constant-flow switchable plunger pumps with small flow rates are currently a domestic gap. Protein purification instruments, as key equipment in biopharmaceutical research and development, have traditionally relied heavily on imports for high-end models. This is primarily because domestically produced pumps lag behind imported products in precision control. Existing plunger pumps typically use pulleys for transmission; however, under high-pressure loads, pulley vibrations can cause instability in plunger operation. Since purification instruments sometimes operate at flow rates less than 0.1 ml / min with extremely narrow tubing (0.1 mm diameter), it is crucial that the pulleys rotate at low speeds without vibration under specific conditions to maintain stable high pressure at the plunger end. Simultaneously, the synchronous motor must respond quickly to flow requirements, operating at high speeds with minimal fluctuations while ensuring that the heat generated during this process does not affect the motor's lifespan. Due to these technical requirements, there has been a lack of suitable small, high-pressure plunger pumps in China for high-precision protein purification instruments. Utility Model Content
[0003] The purpose of this invention is to provide a low-speed protein purification pump set to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a low-speed protein purification pump set, comprising a plunger pump housing, a top cover, a servo motor, and plunger pump heads. Plunger pump heads are installed on both sides of the front of the plunger pump housing. A plunger cavity and a mounting cavity are respectively opened on both sides of the interior of the plunger pump housing. Mounting seats are installed on both sides of the plunger pump housing. A rotating shaft is connected between the two mounting seats within the mounting cavity. A first gear is disposed in the middle of the surface of the rotating shaft. Crankshafts are connected to both sides of the surface of the rotating shaft. A connecting rod is connected to the crankshaft within the mounting cavity. One end of the connecting rod is connected to a linkage shaft. A top cover is installed on the top of the plunger pump housing. A servo motor is installed on the top of the top cover. A second gear is connected to the output end of the servo motor within the mounting cavity.
[0005] Preferably, the rotating shaft is connected to the mounting base via a second bearing, and the output end of the servo motor is connected to the bottom of the mounting cavity via a first bearing.
[0006] Preferably, the first gear and the second gear are positioned correspondingly, and the first gear and the second gear are meshed and connected for transmission.
[0007] Preferably, the connecting rod is connected to the crankshaft via a connecting shaft.
[0008] Preferably, the connecting rod extends through the plunger cavity.
[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is composed of a plunger pump housing, a plunger pump head, a crankshaft, a connecting rod, a first gear, a second gear, a servo motor, etc., wherein the first gear and the second gear are 32-tooth precision structures. When the purifier needs to operate at low speed and high pressure, the motor speed may be less than 1 rpm / minute. The high-precision servo motor can achieve low-speed engagement to provide a constant high pressure to the front plunger pump chamber. In addition, the gear set is fully engaged and supported without vibration, which solves the problem of pressure vibration of the plunger pump in traditional belt-driven purifiers. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0011] Figure 2 This is a schematic diagram of the connection structure between the first gear and the second gear of this utility model;
[0012] Figure 3 This is a schematic diagram of the internal structure of the plunger pump housing of this utility model.
[0013] In the diagram: 1. Plunger pump housing; 2. Top cover; 3. Servo motor; 4. Plunger pump head; 5. Mounting base; 6. Connecting rod; 7. Connecting shaft; 8. Linkage rod; 9. Crankshaft; 10. Rotating shaft; 11. First gear; 12. Second gear; 13. First bearing; 14. Plunger cavity; 15. Mounting cavity; 16. Second bearing. Detailed Implementation
[0014] 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.
[0015] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0016] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0017] Please see Figure 1-3 This utility model provides a technical solution: a low-speed protein purification pump set, including a plunger pump housing 1, a top cover 2, a servo motor 3, and a plunger pump head 4. The plunger pump head 4 is installed on both sides of the front of the plunger pump housing 1. The plunger pump housing 1 has a plunger cavity 14 and a mounting cavity 15 respectively opened on both sides of the interior. Mounting seats 5 are installed on both sides of the plunger pump housing 1. A rotating shaft 10 is connected between the two mounting seats 5 inside the mounting cavity 15. A first gear 11 is set in the middle of the surface of the rotating shaft 10. Crankshafts 9 are connected to both sides of the surface of the rotating shaft 10. A connecting rod 6 is connected to the crankshaft 9 inside the mounting cavity 15. One end of the connecting rod 6 is connected to a linkage shaft 8. The top cover 2 is installed on the top of the plunger pump housing 1. The servo motor 3 is installed on the top of the top cover 2. The output end of the servo motor 3 is connected to a second gear 12 inside the mounting cavity 15.
[0018] Furthermore, the rotating shaft 10 is connected to the mounting base 5 via the second bearing 16, and the output end of the servo motor 3 is connected to the bottom of the inner cavity of the mounting cavity 15 via the first bearing 13.
[0019] Furthermore, the first gear 11 and the second gear 12 are positioned correspondingly, and the first gear 11 and the second gear 12 are meshed and connected for transmission.
[0020] Furthermore, the connecting rod 6 is connected to the crankshaft 9 via a connecting shaft 7.
[0021] Furthermore, connecting rod 6 penetrates the plunger cavity 14.
[0022] This invention employs a high-precision servo motor 3 supporting low-speed rotation to drive the first gear 11 and the second gear 12 below to rotate. The rotation of the first gear 11 drives the rotation of the rotating shaft 10. The other end of the rotating shaft 10 is connected to a crankshaft 9, which suspends the plunger rod of the linkage rod 8. This structure creates high pressure at the plunger front end, and the sinusoidal superposition of the two plungers provides a stable pressure and flow rate to the pump chamber and the one-way valve assembly. On the other hand, the tightly meshed unidirectional rotation of the new gear assembly reduces the possibility of vibration compared to the traditional belt pulley structure. This improves the flow rate accuracy of the purifier, especially for analytical purification experiments with flow rates below 0.1 ml / min, and is perfectly compatible with the continuous use of 3-24 ml molecular sieves both domestically and internationally. At the same time, the gear structure is quieter and stronger than the belt pulley structure, offering significant advantages for purification experiments with long continuous working times. The plunger pump structure designed in this patent is compact and highly pressure-resistant, offering both flexible installation convenience and a high-pressure composite structure that reduces the vibration drawbacks of the belt pulley structure, maintaining plunger support force and stabilizing the pressure inside the pump chamber.
[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A low-speed protein purification pump set, comprising a plunger pump housing (1), a top cover (2), a servo motor (3), and a plunger pump head (4), characterized in that: The plunger pump housing (1) has plunger pump heads (4) installed on both sides of the front. The plunger pump housing (1) has plunger chambers (14) and mounting chambers (15) respectively on both sides. Mounting seats (5) are installed on both sides of the plunger pump housing (1). A rotating shaft (10) is connected between the two mounting seats (5) inside the mounting chamber (15). A first gear (11) is provided in the middle of the surface of the rotating shaft (10). A crankshaft (9) is connected to both sides of the surface of the rotating shaft (10). A connecting rod (6) is connected to the crankshaft (9) inside the mounting chamber (15). A linkage shaft (8) is connected to one end of the connecting rod (6). A top cover (2) is installed on the top of the plunger pump housing (1). A servo motor (3) is installed on the top of the top cover (2). A second gear (12) is connected to the output end of the servo motor (3) inside the mounting chamber (15).
2. The low-speed protein purification pump set according to claim 1, characterized in that: The rotating shaft (10) is connected to the mounting base (5) through the second bearing (16), and the output end of the servo motor (3) is connected to the bottom of the inner cavity of the mounting cavity (15) through the first bearing (13).
3. The low-speed protein purification pump set according to claim 1, characterized in that: The first gear (11) and the second gear (12) are positioned opposite each other, and the first gear (11) and the second gear (12) are meshed and connected for transmission.
4. The low-speed protein purification pump set according to claim 1, characterized in that: The connecting rod (6) is connected to the crankshaft (9) via a connecting shaft (7).
5. The low-speed protein purification pump set according to claim 1, characterized in that: The connecting rod (6) passes through the plunger cavity (14).