Planetary structure type flexible gear ring diaphragm pump

Abstract

The invention discloses a planetary structure type flexible gear ring diaphragm pump, and belongs to the technical field of pumps, the planetary structure type flexible gear ring diaphragm pump comprises a pump body, a motor assembly is arranged in the pump body, an output shaft of the motor assembly is connected with a sun gear, a plurality of planetary gears are rotatably connected in the pump body, a flexible gear ring is arranged in the pump body, and the planetary gears are meshed and matched with the sun gear and the flexible gear ring. A fluid chamber seat is fixed at the end part of the pump body, a three-dimensional diaphragm is fixed in the fluid chamber seat, a plurality of flexible diaphragm chambers are arranged in the three-dimensional diaphragm along the outer circumferential direction of the flexible gear ring, and one-way valve groups are arranged on the flexible diaphragm chambers; planetary transmission and the positive displacement pump principle are combined, controllable deformation of a flexible component is used for replacing a traditional rigid connecting rod or eccentric wheel mechanism, and a brand-new internally-balanced driving mode is provided for fluid conveying; compared with a traditional eccentric wheel driving diaphragm pump, stress of the planet wheels on the two sides is always in internal balance, the running stability and reliability are greatly improved, and the motor cost is optimized.

Description

Technical Field

[0001] This invention relates to the field of pump technology, and in particular to a planetary structure flexible gear ring diaphragm pump. Background Technology

[0002] In the field of fluid transport technology, pumps, as key equipment capable of providing stable flow rates and pressures, are widely used in many important industries such as medical, environmental protection, chemical, food processing, and precision instruments. Among them, diaphragm pumps occupy an important position among various pump types due to their unique advantages, such as transporting media without contamination, good sealing performance, and ability to handle high-viscosity or fluids containing small particles. The core drive mechanism of traditional diaphragm pumps usually relies on a motor driving an eccentric wheel or crank-connecting rod mechanism to convert rotational motion into reciprocating linear motion of the diaphragm, thereby achieving periodic changes in the cavity volume to complete the suction and discharge process.

[0003] As the performance requirements of equipment in various application fields continue to rise, traditional eccentric wheel driven diaphragm pumps have some problems during use. When the eccentric wheel mechanism is running at high speed, it will generate significant periodic unbalanced inertial forces and torques. The vibration caused by the unilateral force on the eccentric wheel structure leads to excessive vibration and noise of the whole machine, which not only affects the comfort of the working environment, but also restricts the application of the pump in precision applications. At the same time, the local stress cycle amplitude of the diaphragm is large, the tensile deformation rate of the diaphragm is large, and the effective discharge of a single working cycle is also limited by the cross-sectional area of ​​the diaphragm. In addition, the motor usually needs to adopt a low speed and high torque design, which increases the complexity of the system and manufacturing costs to a certain extent.

[0004] Therefore, it is necessary to provide a planetary structure flexible gear ring diaphragm pump to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a planetary structure flexible gear ring diaphragm pump to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following solution to the aforementioned technical problems: A planetary flexible gear ring diaphragm pump, comprising a pump body, a motor assembly disposed within the pump body, a sun gear connected to the output shaft of the motor assembly, multiple planetary gears rotatably connected within the pump body, a flexible gear ring disposed within the pump body, the planetary gears meshing with the sun gear and the flexible gear ring, causing periodic changes in the outer diameter of the flexible gear ring during the rotation of the planetary gears, a fluid chamber seat fixed at the end of the pump body, a three-dimensional diaphragm fixed within the fluid chamber seat, multiple flexible diaphragm chambers arranged along the outer circumference of the flexible gear ring within the three-dimensional diaphragm, a one-way valve assembly disposed on each flexible diaphragm chamber, the flexible diaphragm chamber contacting the outer circumferential surface of the flexible gear ring, and the volume within the flexible diaphragm chamber being compressed by the periodic changes in the outer diameter of the flexible gear ring.

[0007] As a further aspect of the invention, it also includes a planetary carrier fixed to the motor assembly, wherein the planetary gears are rotatably mounted on the planetary carrier via bearings.

[0008] As a further embodiment of the present invention, the flexible gear ring is made of an elastomer material, engineering plastic, or flexible composite material.

[0009] As a further embodiment of the present invention, the one-way valve assembly includes an intake check valve and an exhaust check valve disposed on the corresponding flexible diaphragm chamber.

[0010] As a further aspect of the present invention, the constraint structure of the pump body on the flexible gear ring is a smooth cylindrical inner wall surface.

[0011] As a further embodiment of the present invention, a support block is provided inside the pump body.

[0012] As a further embodiment of the present invention, the plurality of flexible diaphragm chambers are evenly arranged on the outer circumference of the flexible gear ring.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This invention combines planetary transmission with the principle of positive displacement pumps, utilizing the controllable deformation of flexible components to replace traditional rigid connecting rods or eccentric wheel mechanisms, providing a novel, inherently balanced driving method for fluid transport. Compared to traditional eccentric wheel-driven diaphragm pumps, the planetary gears on both sides of this invention are always internally balanced, fundamentally eliminating the inherent unilateral force and vibration problems of eccentric wheel structures, significantly improving operational stability and reliability. By arranging the diaphragm on the outer circumference of the gear ring, the effective diaphragm driving surface area in a single working cycle is much larger than that of traditional cross-sectional designs. This not only significantly reduces the tensile deformation rate of the diaphragm itself and extends its service life, but also directly increases the pump's single-cycle displacement and flow output. The large main bearing required to drive the eccentric wheel is eliminated, and the planetary gears directly drive the diaphragm actuator, simplifying the transmission and effectively reducing component and production costs. The planetary reduction mechanism itself achieves torque amplification and speed reduction, allowing for the matching of higher speed, lower torque motors, thereby increasing motor power density and further optimizing motor costs. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a perspective view of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the fluid chamber seat of the present invention. Figure 1 ;

[0018] Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the overall exploded structure of the present invention;

[0020] Figure 5 This is a schematic diagram of the internal structure of the fluid chamber seat of the present invention. Figure 2 ;

[0021] Figure 6 This is a schematic diagram of the flexible gear ring, sun gear, and planet gear structure of the present invention.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Motor assembly; 2. Sun gear; 3. Planetary gears; 4. Flexible gear ring; 5. Pump body; 6. Flexible diaphragm chamber; 7. Suction check valve; 8. Discharge check valve; 9. Planetary carrier; 10. Support block; 11. Fluid chamber seat; 12. Three-dimensional diaphragm. Detailed Implementation

[0024] The technical solution of this invention patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0025] In the description, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation on the invention.

[0026] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Please see Figure 1-6This invention provides a planetary flexible gear ring diaphragm pump, comprising a pump body 5, a motor assembly 1 housed within the pump body 5, a sun gear 2 connected to the output shaft of the motor assembly 1, multiple planetary gears 3 rotatably connected within the pump body 5, a flexible gear ring 4 housed within the pump body 5, the planetary gears 3 meshing with the sun gear 2 and the flexible gear ring 4, causing periodic changes in the outer diameter of the flexible gear ring 4 as the planetary gears 3 rotate. A fluid chamber seat 11 is fixed at the end of the pump body 5, a three-dimensional diaphragm 12 is fixed within the fluid chamber seat 11, and multiple flexible diaphragm chambers 6 arranged along the outer circumference of the flexible gear ring 4 are disposed within the three-dimensional diaphragm 12. A one-way valve assembly is disposed on each of the flexible diaphragm chambers 6. The flexible diaphragm chamber 6 is compressed by the periodic change in the outer diameter of the flexible gear ring 4, which contacts the outer circular surface of the flexible gear ring 4. When in use, the motor assembly 1 starts and drives the sun gear 2 to rotate. The sun gear 2 transmits power to the planet gear 3 that meshes with it. While the planet gear 3 revolves around the sun gear 2, it interacts with an internally meshing flexible gear ring 4. The common normal diameter of the meshing circumference of the planet gear 3 and the flexible gear ring 4 is designed to be larger than the theoretical common normal diameter of the gear ring. This means that during the circumference process, the planet gear 3 does not mesh with the gear ring on a perfect circular trajectory, but will generate a continuous, periodic radial outward "expanding" force on the flexible gear ring 4.Because the flexible gear ring 4 is made of elastically deformable material, this "interference" meshing forces the flexible gear ring 4 to undergo periodic and regular changes in its outer diameter on a unit outer circle. This change in outer diameter directly acts on the multiple flexible diaphragm chambers 6 arranged along its outer circumference. That is, when the outer diameter of the flexible gear ring 4 locally increases, it will squeeze the corresponding flexible diaphragm chamber 6, reducing its volume and increasing the internal pressure, forcing the liquid to open the discharge check valve 8 and discharge. When the planetary gear rotates through this area, and the flexible gear ring 4 recovers or its outer diameter decreases, the flexible diaphragm chamber 6 returns to its original shape under its own elasticity or external fluid pressure, increasing its volume and creating negative pressure, thereby opening the suction check valve 7 to draw in liquid. Multiple flexible diaphragm chambers 6 undergo the discharge and suction processes sequentially and continuously as the planetary gear 3 continuously rotates, eventually converging into a stable and continuous liquid flow at the pump outlet. This invention combines planetary transmission with the principle of a positive displacement pump, using the controllable deformation of flexible components to replace the traditional rigid... The planetary gear mechanism provides a novel, inherently balanced driving method for fluid transport. Compared to traditional eccentric gear-driven diaphragm pumps, the planetary gears on both sides of this invention are always internally balanced, fundamentally eliminating the inherent unilateral force and vibration problems of the eccentric gear structure. This significantly improves operational stability and reliability. By arranging the diaphragm on the outer circumference of the gear ring, the effective diaphragm driving surface area in a single working cycle is much larger than that of the traditional cross-sectional design. This not only significantly reduces the tensile deformation rate of the diaphragm itself and extends its service life, but also directly increases the pump's single-cycle displacement and flow output. The large main bearing required to drive the eccentric gear is eliminated, and the planetary gears directly drive the diaphragm actuator, simplifying the transmission and effectively reducing component and production costs. The planetary reduction mechanism itself achieves torque amplification and speed reduction, allowing for the matching of higher speed, lower torque motors, thereby increasing the motor power density and further optimizing motor costs.

[0028] Example 1

[0029] Parameters of the internal gear of the flexible gear ring: number of teeth 36, module 1, displacement coefficient 0, pressure angle 15°, tooth addendum coefficient 0.6, tooth clearance coefficient 0.05, tooth addendum fillet R0.2, tooth root fillet R0.15;

[0030] Sun gear parameters: 19 teeth, module 1, displacement coefficient 0, pressure angle 15°, addendum coefficient 0.6, clearance coefficient 0.05, addendum fillet R0.2, root fillet R0.15;

[0031] Planetary gear parameters: 10 teeth, 1 module, 0 displacement coefficient, 15° pressure angle, 0.6 addendum coefficient, 0.05 clearance coefficient, R0.2 tooth tip fillet, R0.15 tooth root fillet;

[0032] The sun gear and two planet gears are made of rigid materials, while the gear ring is made of flexible material. In this design, the common normal diameter of the flexible gear ring is 36, and the common normal diameter of the meshing travel of the planet gears and gear ring is 39. As a result, after the three are assembled, one side of the flexible gear ring deviates from the center by a distance of 1.5. This distance is also based on the effective piston stroke distance of the diaphragm around the outer circumference in the design principle of this example. Furthermore, based on the aforementioned basic design principles, the planetary gears are the direct driving force causing the periodic change in the outer diameter of the flexible gear ring. Structurally, it can also be seen that this drive is a planetary reduction system relative to the motor. When the motor drives the sun gear to rotate, it drives the planetary gears to run. According to the planetary reduction system formula, its system reduction ratio is (36 / 19) + 1 = 2.89. This is also the effective speed ratio of the motor and the pump head in this design. For example, when the motor speed is 3000 r / m, the effective speed of the pump head is 3000 / 2.89 = 1038 r / m. Compared with the diaphragm pump with a direct-drive eccentric wheel structure, this system can increase the motor speed by 2.89 times. As can be seen from the general motor design principles, high-speed motors are beneficial for increasing power density and saving copper consumption in the windings.

[0033] Further as Figure 3 , Figure 4 and Figure 5 As shown, it is worth noting that the system also includes a planetary carrier 9 fixed to the motor assembly 1. The planetary gears 3 are rotatably mounted on the planetary carrier 9 via bearings. The planetary gears 3 are mounted on the planetary carrier 9 via bearings, which ensures that the planetary gears 3 can rotate smoothly around their own axes. At the same time, their revolution trajectory is defined and constrained by the structure of the planetary carrier 9, which improves the rigidity and precision of the transmission system and ensures the uniformity of load distribution among multiple planetary gears 3.

[0034] Further as Figure 4 and Figure 5 As shown, it is worth noting that the flexible gear ring 4 is made of elastomeric materials, engineering plastics, or flexible composite materials. Elastomeric materials such as rubber and polyurethane have excellent elastic recovery and fatigue resistance, and can generate large deformations and rebound quickly under the periodic extrusion of the planetary gear 3, thereby optimizing the durability of the gear ring and its compatibility with the working medium, and ensuring its reliability and service life.

[0035] Further as Figure 4As shown, it is worth noting that the one-way valve assembly includes an intake check valve 7 and an exhaust check valve 8 installed on the corresponding flexible diaphragm chamber 6. The intake check valve 7 and the exhaust check valve 8 can be either umbrella valves or disc valves. Both umbrella valves and disc valves are passive one-way valves that automatically open and close based on fluid pressure difference. They have a simple and reliable structure and are suitable for such micro or small volumetric pumps. These valve structures have a certain tolerance to particulate matter and have a rapid opening and closing response, preventing backflow. This enables the pump to perform one-way delivery, ensuring the efficiency and reliability of the pumping process. The valve components themselves have a simple structure, low cost, and are easy to integrate, and do not require additional control mechanisms.

[0036] The working process of this scheme is as follows: After the motor assembly 1 starts, it drives the sun gear 2 to rotate. The sun gear 2 transmits power to the planet gear 3 that meshes with it. While the planet gear 3 revolves around the sun gear 2, it interacts with an internally meshing flexible gear ring 4. The common normal diameter of the meshing circumference of the planet gear 3 and the flexible gear ring 4 is designed to be larger than the theoretical common normal diameter of the gear ring. This means that during the circumference process, the planet gear 3 does not mesh with the gear ring on a perfect circular trajectory, but will generate a continuous, periodic radial outward "opening" force on the flexible gear ring 4. Because the flexible gear ring 4 is made of elastically deformable material, this "interference" meshing will force the flexible gear ring 4 to undergo periodic and regular changes in its outer diameter on a unit outer circle. This change in outer diameter directly acts on the multiple flexible diaphragm chambers 6 arranged along its outer circumference. That is, when the outer diameter of the flexible gear ring 4 increases locally, it will squeeze the corresponding flexible diaphragm chamber 6, reducing its volume and increasing the internal pressure, forcing the liquid to open the discharge check valve 8 and discharge. When the planetary gear rotates through this area, the flexible gear ring 4 returns to its original state or its outer diameter decreases. The flexible diaphragm chamber 6 returns to its original state under its own elasticity or external fluid pressure, and its volume increases to form a negative pressure, thereby opening the suction check valve 7 to draw in liquid. The multiple flexible diaphragm chambers 6 undergo the discharge and suction processes sequentially and continuously as the planetary gear 3 rotates.

[0037] Further as Figure 3 and Figure 5 As shown, it is worth noting that the constraint structure of the pump body 5 on the flexible gear ring 4 is a smooth cylindrical inner wall surface.

[0038] Further as Figure 4 As shown, it is worth noting that a support block 10 is installed inside the pump body 5.

[0039] Further as Figure 5As shown, it is worth noting that multiple flexible diaphragm chambers 6 are evenly arranged on the outer circumference of the flexible gear ring 4. This arrangement of multiple flexible diaphragm chambers 6 on the outer circumference of the flexible gear ring 4 ensures that the radial forces acting on the flexible gear ring 4 are balanced. When one area is squeezed by the planetary gear, the area on the opposite side may be in a state of no force or less force, eliminating the severe vibration and noise caused by unbalanced inertial forces, making the pump run extremely smoothly. At the same time, the uniform arrangement makes the flow output more continuous and the pulsation smaller, improving the quality of the output fluid.

[0040] In summary: The flexible gear ring 4 undergoes periodic and regular changes in its outer diameter on a unit outer circle. These changes directly affect multiple flexible diaphragm chambers 6 arranged along its circumference. Specifically, when the outer diameter of the flexible gear ring 4 locally increases, it compresses the corresponding flexible diaphragm chamber 6, reducing its volume and increasing its internal pressure, forcing the liquid to open the discharge check valve 8 and discharge. When the planetary gear rotates through this area, and the flexible gear ring 4 returns to its original shape or its outer diameter decreases, the flexible diaphragm chamber 6 returns to its original state under its own elasticity or external fluid pressure, increasing its volume and creating negative pressure, thereby opening the suction check valve 7 to draw in liquid. Multiple flexible diaphragm chambers 6 sequentially and continuously undergo the discharge and suction processes as the planetary gear 3 continuously rotates, ultimately converging into a stable and continuous liquid flow at the pump outlet. This invention combines planetary transmission with the principle of a positive displacement pump, utilizing the controllable deformation of flexible components to replace the traditional rigid connecting rod or eccentric wheel mechanism, thus providing a fluid... This invention provides a novel, inherently balanced driving method. Compared to traditional eccentric wheel-driven diaphragm pumps, the planetary gears on both sides of the pump are always internally balanced, fundamentally eliminating the inherent unilateral force and vibration problems of the eccentric wheel structure. This significantly improves operational stability and reliability. By arranging the diaphragm on the outer circumference of the gear ring, the effective diaphragm driving surface area in a single working cycle is much larger than that of the traditional cross-sectional design. This not only significantly reduces the tensile deformation rate of the diaphragm itself and extends its service life, but also directly increases the pump's single-cycle displacement and flow output. The large main bearing required to drive the eccentric wheel is eliminated, and the planetary gears directly drive the diaphragm actuator, simplifying the transmission and effectively reducing component and production costs. The planetary reduction mechanism itself achieves torque amplification and speed reduction, allowing for the matching of higher speed, lower torque motors, thereby increasing the motor power density and further optimizing motor costs.

[0041] The motor can be purchased from the market. The motor assembly is equipped with a power supply. This is a mature technology in the field and has been fully disclosed. Therefore, it will not be repeated in the instruction manual.

[0042] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A planet-structured, flexible ring gear membrane pump comprising a pump body (5), characterized in that The pump body (5) is provided with a motor assembly (1), the output shaft of the motor assembly (1) is connected with a sun gear (2), a plurality of planet gears (3) are rotatably connected in the pump body (5), a flexible ring gear (4) is arranged in the pump body (5), the planet gears (3) are in meshing cooperation with the sun gear (2) and the flexible ring gear (4), and the periodic outer diameter change of the flexible ring gear (4) is caused when the planet gears (3) run around, the end of the pump body (5) is fixed with a fluid chamber seat (11), a three-dimensional diaphragm (12) is fixed in the fluid chamber seat (11), a plurality of flexible diaphragm chambers (6) are arranged in the three-dimensional diaphragm (12) along the outer circumferential direction of the flexible ring gear (4), a one-way valve group is arranged on the flexible diaphragm chamber (6), the flexible diaphragm chamber (6) is in contact with the outer circular surface of the flexible ring gear (4), and the volume in the flexible diaphragm chamber (6) is extruded through the periodic outer diameter change of the flexible ring gear (4).

2. A flexural meshing membrane pump of planetary design according to claim 1, characterized in that: A planet carrier (9) fixed with the motor assembly (1) is further included, and the planet gears (3) are rotatably installed on the planet carrier (9) through bearings.

3. A flexural meshing membrane pump of planetary design according to claim 2, characterized in that: The flexible ring gear (4) is made of an elastomer material, an engineering plastic or a flexible composite material.

4. A flexural meshing membrane pump of planetary design according to claim 3, characterized in that: The one-way valve group includes suction check valves (7) and discharge check valves (8) arranged on the corresponding flexible diaphragm chambers (6).

5. A flexural meshing membrane pump of planetary design according to claim 1, characterized in that: The constraint structure of the pump body (5) on the flexible ring gear (4) is a smooth cylindrical inner wall surface.

6. A flexural meshing membrane pump of planetary design according to claim 5, characterized in that: The pump body (5) is provided with a support support block (10).

7. A flexural meshing membrane pump of planetary design according to claim 1, characterized in that: The plurality of flexible diaphragm chambers (6) are uniformly arranged on the outer circumference of the flexible ring gear (4).

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