Power output structure of a double-cylinder double-acting diaphragm pump

Abstract

The utility model discloses a kind of power output structures of double-cylinder double-acting diaphragm pump, to provide a kind of double-cylinder double-acting diaphragm pump power output structure with stable reliable power transmission performance, it is convenient to maintain and can adapt to various working conditions, its technical scheme main point is including the mounting bracket for supporting overall structure, two symmetrical liquid end and the driving mechanism for providing power for liquid end are equipped on the mounting bracket, the driving mechanism includes motor and the transmission component for transmission power, the transmission component includes worm gear, the box body between motor and transmission component is arranged and the double eccentric shaft, crank, connecting rod and crosshead that are sequentially transmission connection are arranged in box body, the motor is connected with double eccentric shaft to form rotary motion after worm gear deceleration, and reciprocating motion is formed by crosshead by crank and connecting rod conversion again.The utility model is applicable to diaphragm pump technical field.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and more specifically, to a power output structure for a double-cylinder double-acting diaphragm pump. Background Technology

[0002] Traditional double-cylinder double-acting diaphragm pumps often employ simple belt or chain drives for power output. During prolonged operation, belts are prone to slippage and wear, while chains may become loose or skip teeth. This not only leads to unstable power transmission, affecting the stability of the pump's flow and pressure output, but also necessitates frequent belt or chain replacements, increasing maintenance costs and downtime, and reducing production efficiency. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a power output structure for a double-cylinder double-acting diaphragm pump that has stable and reliable power transmission performance, is easy to maintain, and can adapt to various working conditions.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a power output structure for a double-cylinder double-acting diaphragm pump, including a mounting bracket for supporting the overall structure. The mounting bracket is provided with two symmetrically arranged hydraulic ends and a drive mechanism for providing power to the hydraulic ends. The drive mechanism includes a motor and a transmission component for transmitting power. The transmission component includes a worm gear, a housing disposed between the motor and the transmission component, and a double eccentric wheel shaft, a crank, a connecting rod, and a crosshead that are sequentially connected within the housing. The motor is decelerated by the worm gear and then connected to the double eccentric wheel shaft to form rotational motion, which is then converted into reciprocating motion by the crosshead through the crank and connecting rod.

[0005] The present invention is further configured such that: the mating parts of the double eccentric wheel shaft, crank, connecting rod and crosshead in the power transmission assembly are all provided with wear-resistant bushings, the wear-resistant bushings are made of copper alloy, and the inner wall of the bushing is provided with oil lubrication grooves to reduce friction loss.

[0006] The present invention is further configured such that the diameter of one end of the double eccentric wheel shaft is 3-4 times the diameter of the other end connected to the crosshead.

[0007] The present invention is further configured such that: the hydraulic end is provided with two parallel cylinders, a plunger penetrating the cylinders, and a plunger sleeve at one end; the plunger located in the channel between the two cylinders is fitted with a piston ring; the plunger adopts a rod structure at both ends to ensure that the volume change of the left and right cylinders is consistent and to optimize and reduce the flow pulsation rate.

[0008] The present invention is further configured such that: two membrane cavities are symmetrically provided on one side of the hydraulic end, and the membrane cavity is provided with a working chamber, a flexible diaphragm that divides the working chamber into a hydraulic side and a medium side, and an inlet and an outlet provided at both ends of the membrane cavity.

[0009] The present invention is further configured such that: the flexible diaphragm has a large diameter and a straight flow channel; both the inlet and outlet are equipped with one-way valves; and the upper surface of the valve seat of the one-way valve has a sloping anti-settling structure to prevent slurry from settling and accumulating on the upper surface of the valve seat.

[0010] The beneficial effects of this utility model are:

[0011] 1. The mounting bracket features two symmetrical hydraulic ends, significantly enhancing the stability of the entire diaphragm pump. During operation, the symmetrical structure ensures even force distribution on the pump body, reducing vibration and noise caused by uneven force. This not only extends the pump's lifespan and reduces maintenance costs but also provides operators with a relatively quiet and stable working environment, minimizing the harmful effects of noise pollution. The motor power is precisely reduced by a worm gear and then converted into the rotational motion of the double eccentric shaft. This rotation is further converted into the reciprocating motion of the crosshead via a crank and connecting rod. The meshing characteristics of the worm gear effectively reduce speed and increase torque. Combined with the double eccentric shaft, this results in a more balanced power output from the dual-cylinder hydraulic ends, reducing flow pulsation and ensuring the stability of media delivery. This meets the requirements of industries such as chemical and environmental protection for precise and continuous fluid delivery.

[0012] 2. The mating parts of the double eccentric wheel shaft, crank, connecting rod, and crosshead in the power transmission assembly are all equipped with wear-resistant bushings made of copper alloy. This improves the service life and operational stability of the diaphragm pump. Copper alloy has excellent wear resistance and self-lubricating properties, effectively reducing direct friction between components during power transmission. During the rotation of the double eccentric wheel shaft, the oscillation of the crank, and the reciprocating motion of the connecting rod and crosshead, the wear-resistant bushings bear most of the frictional force, avoiding direct contact and wear between metal parts. This extends the service life of these critical components and reduces the frequency and cost of equipment maintenance. The inner wall of the bushing has oil lubrication grooves that store lubricating oil. During component movement, the lubricating oil continuously forms a uniform oil film at the mating parts, separating the metal surfaces, reducing the coefficient of friction, and making power transmission smoother. The diameter of one end of the double eccentric wheel shaft is 3-4 times the diameter of the other end connected to the crosshead. The larger diameter end can provide a larger support area and rotational inertia, making the double eccentric wheel shaft more stable during rotation and reducing vibration and sway. This helps to improve the accuracy and stability of power transmission and ensures that the working performance of the diaphragm pump is not affected. The smaller diameter can accommodate the reciprocating motion of the crosshead, reduce unnecessary space occupation, and make the structure of the entire power transmission assembly more compact.

[0013] 3. Two parallel cylinders are arranged within the hydraulic end, allowing the diaphragm pump to simultaneously deliver liquid to both cylinders during operation. Compared to a single-cylinder design, the parallel dual-cylinder structure significantly increases the liquid delivery volume per unit time, improving the pump's efficiency. A plunger penetrating the cylinder and a plunger sleeve at one end provide stable power for liquid delivery. The plunger reciprocates within the cylinder, drawing in and discharging liquid. The plunger sleeve protects the plunger, preventing wear and corrosion during operation, extending its service life and reducing maintenance costs. A piston ring is fitted to the plunger in the channel between the two cylinders. During the plunger's reciprocating motion, the piston ring tightly conforms to the cylinder wall, preventing leakage between cylinders and ensuring the liquid flows along a predetermined path, thus improving the efficiency and accuracy of liquid delivery. The plunger adopts a rod structure at both ends, which ensures that the volume change of the left and right cylinders is consistent. During the operation of the diaphragm pump, the volume of the left and right cylinders will change with the reciprocating motion of the plunger. The rod structure at both ends makes the volume change of the two cylinders synchronous and equal, avoiding flow pulsation caused by inconsistent volume changes.

[0014] 4. Two symmetrically arranged diaphragm chambers on one side of the hydraulic end further enhance the stability of the diaphragm pump. The symmetrical diaphragm chambers ensure more even force distribution during operation, reducing vibration and noise caused by unbalanced forces. Stable operation not only extends the service life of the diaphragm pump components but also improves the reliability of the entire system, reduces equipment failure rates, and minimizes production losses due to equipment maintenance and downtime. The flexible diaphragm within the diaphragm chamber has a large diameter and a straight flow channel. The large diameter allows for a larger flow rate of medium, increasing the pump's delivery capacity, while the straight flow channel reduces resistance during flow, enabling the medium to pass through the diaphragm chamber more smoothly. Both the inlet and outlet are equipped with check valves. When the diaphragm pump is working, the check valves can accurately control the inflow and outflow direction of the medium and prevent backflow. The sloping anti-settling structure on the upper surface of the check valve seat prevents solid particles in the slurry from settling and accumulating on the upper surface of the valve seat when the slurry is being transported. This would prevent the check valve from opening and closing properly and affect the working performance of the diaphragm pump. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a partial sectional view of the present invention;

[0017] Figure 3 This is a sectional view of the box.

[0018] Figure 4This is a cross-sectional view of the hydraulic end;

[0019] Figure 1-4 Reference numerals: 1. Mounting bracket; 2. Hydraulic end; 3. Check valve; 4. Motor; 5. Housing; 6. Double eccentric wheel shaft; 7. Crosshead; 8. Bushing; 9. Cylinder; 10. Plunger; 11. Plunger sleeve; 12. Piston ring; 13. Diaphragm chamber; 14. Working chamber; 15. Inlet; 16. Outlet; 17. Hoses and diaphragm. Detailed Implementation

[0020] Reference Figures 1 to 4 The embodiments of this utility model will be further described below.

[0021] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0023] Figures 1 to 4The power output structure of a dual-cylinder, double-acting diaphragm pump shown includes a mounting frame 1 for supporting the overall structure. The mounting frame 1 is characterized by having two symmetrically arranged hydraulic ends 2 and a drive mechanism that provides power to the hydraulic ends 2. This significantly improves the stability of the entire diaphragm pump. During operation, the symmetrical structure ensures uniform force distribution on the pump body, reducing vibration and noise caused by uneven force distribution. This not only helps extend the service life of the diaphragm pump and reduce equipment maintenance costs, but also provides operators with a relatively quiet and stable working environment, reducing the harm of noise pollution to the human body. The drive mechanism includes a motor 4 and a transmission component for transmitting power. The transmission component includes a worm gear, a housing 5 disposed between the motor 4 and the transmission component, and a double eccentric wheel shaft 6, a crank, a connecting rod, and a crosshead 7 sequentially connected within the housing 5. The power from the motor 4 is precisely reduced by the worm gear and converted into the rotational motion of the double eccentric wheel shaft 6, which is then orderly converted into the reciprocating motion of the crosshead 7 through the crank and connecting rod. The meshing characteristics of the worm gear can effectively reduce the speed and increase the torque. Combined with the double eccentric wheel shaft 6, this makes the power output of the double-cylinder hydraulic end 2 more balanced, reduces flow pulsation, and ensures the stability of medium transportation, thus meeting the requirements of chemical, environmental protection, and other industries for the accuracy and continuity of fluid transportation.

[0024] Wear-resistant bushings 8 are provided at the mating parts of the double eccentric wheel shaft 6, crank, connecting rod, and crosshead 7 in the power transmission assembly. This improves the service life and operational stability of the diaphragm pump. The wear-resistant bushings 8 are made of copper alloy, which has excellent wear resistance and self-lubricating properties, effectively reducing direct friction between components during power transmission. When the double eccentric wheel shaft 6 rotates, the crank swings, and the connecting rod and crosshead 7 reciprocate, the wear-resistant bushings 8 bear most of the frictional force, avoiding direct contact and wear between metal parts, thereby extending the service life of these critical components and reducing the frequency and cost of equipment maintenance. The inner wall of the bushing 8 has oil lubrication grooves that store lubricating oil. During component movement, the lubricating oil continuously forms a uniform oil film at the mating parts, separating the metal surfaces, reducing the coefficient of friction, and making power transmission smoother.

[0025] When the diameter of one end of the double eccentric wheel shaft 6 is less than three times the diameter of the part connecting the other end to the crosshead 7, the supporting area and moment of inertia it provides will be insufficient. During the rotation of the double eccentric wheel shaft 6, the smaller supporting area cannot effectively distribute stress, easily leading to excessive wear at the journal. When the diameter of one end of the double eccentric wheel shaft 6 is greater than four times the diameter of the part connecting the other end to the crosshead 7, the center of gravity distribution of the double eccentric wheel shaft 6 will be severely unbalanced. During high-speed rotation, a large centrifugal force will be generated, leading to strong vibration. Excessive vibration will not only affect the overall stability of the diaphragm pump, but also... This will cause additional stress to the mounting bracket 1 and other connecting components; therefore, it is optimal when the diameter of one end of the double eccentric wheel shaft 6 is 3-4 times the diameter of the other end connected to the crosshead 7. The appropriate ratio can provide a larger cross-sectional area and moment of inertia, which can better resist bending and torsional stress, making the double eccentric wheel shaft 6 more stable when rotating at high speed, reducing the possibility of vibration and deformation. The stable structure helps to extend the service life of the double eccentric wheel shaft 6 itself and other components connected to it, reducing the probability of equipment failure due to component damage, and improving the reliability and stability of the entire diaphragm pump system.

[0026] The hydraulic end 2 is equipped with two parallel cylinders 9, a plunger 10 penetrating the cylinders 9, and a plunger 10 sleeve at one end. The two parallel cylinders 9 allow the diaphragm pump to simultaneously deliver liquid to both cylinders 9 during operation. Compared to a single-cylinder design, the parallel dual-cylinder structure significantly increases the liquid delivery volume per unit time, improving the diaphragm pump's efficiency. The plunger 10 penetrating the cylinders 9 and the plunger 10 sleeve at one end provide stable power for liquid delivery. The plunger 10 reciprocates within the cylinders 9, drawing in and discharging liquid. The plunger 10, located in the channel between the two cylinders 9, is fitted with a piston ring 12. The plunger 10 sleeve protects the plunger 10, preventing wear and corrosion during operation, extending its service life, and reducing equipment maintenance costs. A piston ring 12 is fitted onto the plunger 10 located in the channel between the two cylinders 9. When the plunger 10 reciprocates, the piston ring 12 fits tightly against the wall of the cylinder 9, preventing liquid leakage between the cylinders and ensuring that the liquid flows along a predetermined path, thus improving the efficiency and accuracy of liquid delivery. The plunger 10 adopts a rod-shaped structure at both ends, ensuring that the volume changes of the left and right cylinders 9 are consistent. During the operation of the diaphragm pump, the volume of the left and right cylinders 9 changes with the reciprocating motion of the plunger 10. The rod-shaped structure at both ends ensures that the volume changes of the two cylinders 9 are synchronous and equal, avoiding flow pulsation caused by inconsistent volume changes.

[0027] Two diaphragm chambers 13 are symmetrically arranged on one side of the hydraulic end 2. Each diaphragm chamber 13 contains a working chamber 14, a flexible diaphragm 17 dividing the working chamber 14 into a hydraulic side and a medium side, and inlet ports 15 and outlet ports 16 located at both ends of the diaphragm chamber. This further enhances the stability of the diaphragm pump operation. The symmetrical diaphragm chambers 13 ensure more even force distribution during pump operation, reducing vibration and noise caused by unbalanced forces. Stable operation not only extends the service life of the diaphragm pump components but also improves the reliability of the entire system, reduces the incidence of equipment failure, and minimizes production losses due to equipment maintenance and downtime.

[0028] The flexible diaphragm 17 has a large diameter and a straight flow channel. The large diameter allows for a larger flow rate of medium, improving the pump's delivery capacity. The straight flow channel reduces resistance during flow, allowing the medium to pass through the membrane cavity 13 more smoothly. Both the inlet 15 and outlet 16 are equipped with check valves 3. During pump operation, the check valves 3 accurately control the inflow and outflow direction of the medium, preventing backflow. The sloping anti-settling structure on the upper surface of the check valve 3 seat prevents solid particles in the slurry from accumulating on the upper surface of the valve seat, thus preventing the check valve 3 from opening and closing properly and affecting the pump's performance.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power output structure for a double-cylinder, double-acting diaphragm pump, comprising a mounting bracket (1) for supporting the overall structure, characterized in that, The mounting bracket (1) is provided with two symmetrically arranged hydraulic ends (2) and a drive mechanism that provides power to the hydraulic ends (2). The drive mechanism includes a motor (4) and a transmission component for transmitting power. The transmission component includes a worm gear, a housing (5) disposed between the motor (4) and the transmission component, and a double eccentric wheel shaft (6), a crank, a connecting rod and a crosshead (7) disposed in the housing (5) and connected in sequence for transmission. The motor (4) is decelerated by the worm gear and then connected to the double eccentric wheel shaft (6) to form a rotational motion, which is then converted into a reciprocating motion by the crosshead (7) through the crank and connecting rod.

2. The power output structure of a double-cylinder double-acting diaphragm pump according to claim 1, characterized in that, Wear-resistant bushings (8) are provided at the mating parts of the double eccentric wheel shaft (6), crank, connecting rod and crosshead (7) in the power transmission assembly. The wear-resistant bushings (8) are made of copper alloy and have oil lubrication grooves on the inner wall of the bushings (8) to reduce friction loss.

3. The power output structure of a double-cylinder double-acting diaphragm pump according to claim 1, characterized in that, The diameter of one end of the double eccentric wheel shaft (6) is 3-4 times the diameter of the part where the other end connects with the crosshead (7).

4. The power output structure of a double-cylinder double-acting diaphragm pump according to claim 1, characterized in that, The hydraulic end (2) is provided with two parallel cylinders (9), a plunger (10) penetrating the cylinder (9), and a plunger (10) sleeve at one end. The plunger (10) located in the channel between the two cylinders (9) is fitted with a piston ring (12). The plunger (10) adopts a rod structure at both ends to ensure that the volume change of the left and right cylinders (9) is consistent and to optimize and reduce the flow pulsation rate.

5. The power output structure of a double-cylinder double-acting diaphragm pump according to claim 1, characterized in that, Two membrane chambers (13) are symmetrically provided on one side of the hydraulic end (2). The membrane chamber (13) is provided with a working chamber (14), a flexible diaphragm (17) that divides the working chamber (14) into a hydraulic side and a medium side, and an inlet (15) and an outlet (16) provided at both ends of the membrane chamber.

6. The power output structure of a double-cylinder double-acting diaphragm pump according to claim 5, characterized in that, The flexible diaphragm (17) has a large diameter and a straight flow channel. Both the inlet (15) and outlet (16) are equipped with one-way valves (3). The upper surface of the valve seat of the one-way valve (3) is a sloped anti-settling structure to prevent slurry from settling and accumulating on the upper surface of the valve seat.

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