VIBRATION-REDUCING STRUCTURE FOR COMPRESSING DIAPHRAGM PUMP
A vibration-reducing method for reducing vibrations and vibration noise in a compressing diaphragm pump includes the step of disposing a vibration-reducing unit between the pump head body and a diaphragm membrane to reduce a length of the moment arm, and therefore of the torque, generated upon up and down movement of the diaphragm membrane during pumping.
This application claims the benefit of provisional U.S. Patent Application No. 61/928,162, filed Jan. 16, 2014, and incorporated herein by reference.
FIELD OF THE PRESENT INVENTIONThe present invention relates to a vibration-reducing method for compressing diaphragm pump used in a reverse osmosis purification system, and particularly to a method that utilizes a vibration-reducing unit to reduce the vibration strength of the pump so that the annoying noise incurred by consonance with the housing of the reverse osmosis purification system is eliminated when the vibration-reducing unit is installed thereon.
BACKGROUND OF THE INVENTIONConventional compressing diaphragm pumps, which have been exclusively used with RO (Reverse Osmosis) purifier or RO water purification systems, are disclosed in U.S. Pat. Nos. 4,396,357, 4,610,605, 5,476,367, 5,571,000, 5,615,597, 5,626,464, 5,649,812, 5,706,715, 5,791,882, 5,816,133, 6,048,183, 6,089,838, 6,299,414, 6,604,909, 6,840,745 and 6,892,624.
The conventional compressing diaphragm pump, as shown in
Fifthly, a nut 3 (shown in
Firstly, when the motor 10 is powered on, the wobble plate 40 is driven to rotate by the motor output shaft 11 so that the three eccentric roundels 52 on the eccentric roundel mount 50 move sequentially up-and-down in a constant reciprocal stroke. Secondly, in the meantime, the three pumping pistons 80 and three piston acting zones 73 in the diaphragm membrane 70 are driven by the up-and-down reciprocal stroke of the three eccentric roundels 52 to move in a sequential up-and-down displacement. Thirdly, when the eccentric roundel 52 moves in a down stroke with pumping piston 80 and piston acting zone 73 being downwardly displaced, the piston disk 96 in the piston valvular assembly 90 is pushed into an open status so that the tap water W can flow into the water inlet chamber 26 via water inlet orifice 21 in the pump head cover 20 and sequentially via inlet ports 95 in the piston valvular assembly 90 (as indicated by the arrow in the enlarged portion of
Referring to
To address the above-described drawbacks of the conventional compressing diaphragm pump, a cushion base 100 with a pair of wing plates 101 is added to provide supplementary support for the pump (as shown in
However, the practical vibration suppressing efficiency of using foregoing cushion base 100 with wing plates 101 and rubber shock absorber 102 only affects the primary vibrating drawback to a limited degree, and does not solve the drawbacks of overall resonant shaking or water leakage for the conventional compressing diaphragm pump. The problem of substantially reducing all of the drawbacks associated with the operating vibration of the compressing diaphragm pump has become an urgent and critical issue.
SUMMARY OF THE INVENTIONAn objective is to provide a vibration-reducing method for a compressing diaphragm pump that features of a vibration-reducing unit. The compressing diaphragm pump includes a brushed or brushless motor with an output shaft, a pump head cover, a motor upper chassis, a wobble plate with integral protruding cam-lobed shaft, an eccentric roundel mount with three eccentric roundels, a pump head body, a diaphragm membrane with three piston acting zones, three pumping pistons and a piston valvular assembly. The vibration-reducing unit is disposed between the pump head body and diaphragm membrane. The vibration-reducing unit functions for diminishing torque by shortening the length of the moment arm for the circumnutating action of the eccentric roundel mount in each piston acting zone. Since the torque is the equal to the length of moment arm multiplied by a constant acting force, a lower torque is generated by the shortened length of moment arm. Consequently, with less torque for the compressing diaphragm pump, the strength of vibration is substantially reduced, with a consequent lowering of annoying vibration noise.
Another objective is to provide a vibration-reducing method for a compressing diaphragm pump that features a vibration-reducing unit disposed between a pump head body with three basic curved indents and a diaphragm membrane with three basic curved protrusions, in which the three basic curved protrusions are completely inserted into the corresponding three basic curved indents. The vibration-reducing unit functions to diminish torque by shortening the length of the moment arm for each piston acting zone upon circumnutating action of the eccentric roundel mount. Because the torque is obtained by multiplying the length of the moment arm by a constant acting force, is reduced due to the shortened length of moment arm, the strength of vibration and the resulting vibration noise is also substantially reduced.
The basic operation mode of the compressing diaphragm pump is as follows: When the motor 10 is powered on, the wobble plate 40 is driven to rotate by the motor output shaft 11 so that three eccentric roundels 52 on the eccentric roundel mount 50 sequentially and constantly move in up-and-down reciprocal stroke. Meanwhile, three pumping pistons 80 and three piston acting zones 73 in the diaphragm membrane 70 are driven by the sequential up-and-down reciprocal stroke of the three eccentric roundels 52 to move in an up-and-down displacement. Thereby, the tap water W, which flows into the piston valvular assembly 90, is compressed to obtain pressurized water Wp, which is constantly discharged out of the compressing diaphragm pump for being further RO-filtered by the RO-cartridge and used in the reverse osmosis water purification system.
A vibration-reducing unit is further disposed between the pump head body 60 and diaphragm membrane 70 to reduce the torque of each piston acting zone 73 in the diaphragm membrane 70 by shortening the length of the moment arm that occurs upon the circumnutating action of each eccentric roundels 52 in the eccentric roundel mount 50, so that the vibration strength of the compressing diaphragm pump is effectively reduced. The vibration-reducing unit includes a pair of mated acting fasteners, which are composed of a pump head body acting fastener 600 (as indicated by the reference number 600 shown in
Each basic curved groove 65 in the first exemplary embodiment can be replaced by a curved slot (not shown in figures). Moreover, the basic curved groove 65 in the pump head body 60 and corresponding basic curved protrusion 76 in the diaphragm membrane 70 can also be exchanged with a basic curved protrusion 65 in the pump head body 60 and corresponding basic curved groove 76 in the diaphragm membrane 70 without affecting their mating condition.
Each basic curved groove 65 and outer second curved groove 66 in the second exemplary embodiment can also be replaced by curved slots (not shown in figures). Moreover, the paired basic curved groove 65 with outer second curved groove 66 in the pump head body 60 and corresponding paired basic curved protrusion 76 with outer second curved protrusion 77 in the mating diaphragm membrane 70 can be exchanged for a paired basic curved protrusion 65 with outer second curved protrusion 66 in the pump head body 60 and corresponding paired basic curved groove 76 with outer second curved groove 77 in the mating diaphragm membrane 70 without affecting their mating condition.
Each basic indented ring 601 in the third exemplary embodiment can be replaced by a slot ring (not shown in figures). Moreover, the basic indented ring 601 in the pump head body 60 and corresponding basic protruded ring 701 in the mating diaphragm membrane 70 can be exchanged with a basic protruded ring 601 in the pump head body 60 and corresponding basic indented ring 701 in the mating diaphragm membrane 70 without affecting their mating condition.
Besides, each group of circumferentially located curved indented segments 602 in the fourth exemplary embodiment can be replaced by a group of circumferentially located curved slot segments (not shown in figures). Moreover, the curved indented segments 602 in the pump head body 60 and corresponding curved protruding segments 702 in the mating diaphragm membrane 70 can be exchanged with curved protruding segments 602 in the pump head body 60 and corresponding curved indented segments 702 in the mating diaphragm membrane 70 without affecting their mating condition. Similarly, each group of circumferentially located round holes 603 and square holes 604 can also be replaced by a group of circumferentially located round holes and square holes (not shown in figures). Moreover, the round holes 603 in the pump head body 60 and corresponding round protrusions 703 in the mating diaphragm membrane 70 can be exchanged with the round protrusions 603 in the pump head body 60 and corresponding round holes 703 in the mating diaphragm membrane 70 without affecting their mating condition, while the square holes 604 in the pump head body 60 and corresponding square protrusions 704 in the mating diaphragm membrane 70 can also be exchanged with square protrusions 604 in the pump head body 60 and corresponding square holes 704 in the mating diaphragm membrane 70 without affecting their mating condition as well.
Each basic indented ring 601 and outer second indented ring 605 in the fifth exemplary embodiment can also be replaced by slot rings (not shown in figures). Moreover, the paired basic indented ring 601 with outer second indented ring 605 in the pump head body 60 and corresponding paired basic protruding ring 701 with outer second protruding ring 705 in the mating diaphragm membrane 70 can be exchanged with pair of basic protruding ring 601 with outer second protruding ring 605 in the pump head body 60 and corresponding paired basic indented ring 701 with outer second indented ring 705 in the mating diaphragm membrane 70 without affecting their mating condition.
Basing on the foregoing disclosure, it is apparent that the present invention substantially achieves a vibration reducing effect in compressing diaphragm pump by means of simple vibration-reducing unit without increasing overall cost. The present invention surely solves all issues of annoying noise and resonant shaking resulting from vibration in the conventional compressing diaphragm pump, thereby providing valuable industrial applicability.
Claims
1. A vibration-reducing method for a compressing diaphragm pump having a motor, a pump head body fixed to a motor housing, a roundel mount situated on a lower side of the pump head body and a plurality of eccentric roundels that extend through operating holes in the pump head body, a diaphragm membrane fixed to the eccentric roundels through the operating holes and situated on an upper side of the pump head body, and a plurality of pumping pistons arranged to be moved in a pumping action upon movement of the diaphragm membrane, comprising the step of:
- disposing a vibration-reducing unit between the pump head body and diaphragm membrane to lessen the torque of each piston acting zone in the diaphragm membrane by shortening a length of a moment arm generated as a result of circumnutating action of the eccentric roundels in the eccentric roundel mount, so that the vibration strength of the compressing diaphragm pump is effectively reduced, the vibration-reducing unit including a pair of mated vibration-reducing structures, said pair of mated vibration-reducing structures including a pump head body vibration-reducing structure, which is disposed on the upper side of the pump head body, and a mating diaphragm membrane vibration-reducing structure, which is disposed on the bottom side of the diaphragm membrane at a position corresponding to a position of the pump head body vibration-reducing structure on the pump head body, said pump head body vibration-reducing structure and said diaphragm membrane vibration-reducing structure being mated to each other to establish a position of one end of the moment arm at the position of said mating vibration-reducing structures.
2. A vibration-reducing method for a compressing diaphragm pump with a vibration-reducing structure as claimed in claim 1, wherein the motor includes an output shaft, a wobble plate with an integral protruding cam-lobed shaft, and a piston valvular assembly, wherein said eccentric roundel mount includes a bearing for rotatably receiving the integral protruding cam-lobed shaft of the wobble plate, a plurality of eccentric roundels are evenly and circumferentially located on each eccentric roundel, the plurality of eccentric roundels each including a fastening bore formed therein respectively; said pump head body includes a plurality of evenly and circumferentially located through holes, each through hole having an inner diameter slightly bigger than an outer diameter of a respective eccentric roundel on the eccentric roundel mount for receiving the respective eccentric roundel, and said diaphragm membrane includes a plurality of evenly spaced radial raised partition ribs such that when the diaphragm membrane is peripherally attached in a sealing manner to the piston valvular assembly, a plurality of equivalent piston acting zones are formed and partitioned by the radial raised partition ribs such that each piston acting zone has a central through hole therein at a position corresponding to a position of each fastening bore in the eccentric roundel mount respectively; wherein when the motor is powered on, the wobble plate is driven to rotate by the motor output shaft so that the plurality of eccentric roundels on the eccentric roundel mount sequentially move in a constant up-and-down reciprocal stroke while the plurality of pumping pistons and piston acting zones in the diaphragm membrane are driven by the up-and-down reciprocal stroke of the eccentric roundels to move in up-and-down displacement to thereby cause tap water, which flows into the piston valvular assembly, to be compressed to become pressurized water, the pressurized water being constantly discharged out of the compressing diaphragm pump to be further reverse osmosis (RO)-filtered by an RO-cartridge and used in the reverse osmosis water purification system.
3. The vibration-reducing method as claimed in claim 2, wherein each said pump head body vibration-reducing structure is a curved groove in the pump head body and each said diaphragm membrane vibration-reducing structure is a curved protrusion extending from the diaphragm membrane.
4. The vibration-reducing method as claimed in claim 2, wherein each said pump head body vibration-reducing structure is a curved slot in the pump head body and each said diaphragm membrane vibration-reducing structure is a curved protrusion extending from the diaphragm membrane.
5. The vibration-reducing method as claimed in claim 2, wherein each said pump head body vibration-reducing structure is a curved set of openings in the pump head body and each said diaphragm membrane vibration-reducing structure is a curved set of protrusions extending from the diaphragm membrane.
6. The vibration-reducing method as claimed in claim 2, wherein each said pump head body vibration-reducing structure is a curved protrusion extending from the pump head body and each said diaphragm membrane vibration-reducing structure is a curved groove in the diaphragm membrane.
7. The vibration-reducing method as claimed in claim 2, wherein each said pump head body vibration-reducing structure is a curved protrusion extending from the pump head body and each said diaphragm membrane vibration-reducing structure is a curved slot in the diaphragm membrane.
8. The vibration-reducing method as claimed in claim 2, wherein each said pump head body vibration-reducing structure is a curved set of protrusions extending from the pump head body and each said diaphragm membrane vibration-reducing structure is a curved set of openings in the diaphragm membrane.
9. The vibration-reducing method as claimed in claim 8, wherein said protrusions are round protrusions.
10. The vibration-reducing method as claimed in claim 8, wherein said protrusions are square protrusions.
11. The vibration-reducing method as claimed in claim 1, wherein each said pump head body vibration-reducing structure is a pair of curved grooves or slots in the pump head body and each said diaphragm membrane vibration-reducing structure is a pair of curved protrusions extending from the diaphragm membrane.
12. The vibration-reducing method as claimed in claim 1, wherein each said pump head body vibration-reducing structure is a curved protrusions extending from the pump head body and each said diaphragm membrane vibration-reducing structure is a pair of curved grooves or slots in the diaphragm membrane.
13. The vibration-reducing method as claimed in claim 12, wherein said protrusions are round protrusions.
14. The vibration-reducing method as claimed in claim 12, wherein said protrusions are round protrusions.
15. The vibration-reducing method as claimed in claim 2, wherein each said pump head body vibration-reducing structure is an indented ring in the pump head body and each said diaphragm membrane vibration-reducing structure is a ring structure projecting from the diaphragm membrane.
16. The vibration-reducing method as claimed in claim 2, wherein each said pump head body vibration-reducing structure is a pair of indented rings in the pump head body and each said diaphragm membrane vibration-reducing structure is a pair of ring structures projecting from the diaphragm membrane.
17. The vibration-reducing method as claimed in claim 2, wherein each said eccentric roundel further includes an annular groove extending around said fastening bore, and said pump head body further includes a plurality of lower annular flanges extending into respective said annular grooves when said pump head body is fastened to said eccentric roundel.
18. The vibration-reducing method as claimed in claim 2, wherein said at least one raised rim of said diaphragm membrane is an inner raised rim, said diaphragm membrane includes a parallel outer raised rim, said piston valvular assembly includes a downwardly extending raised rim, and said to downwardly extending raised rim of said piston valvular assembly extends between said inner and outer raised rims of said diaphragm membrane to provide a peripheral seal when said diaphragm membrane is peripherally secured to said piston valvular assembly.
19. The vibration-reducing method as claimed in claim 2, wherein a respective number of said eccentric roundels, said operating holes in said pump head body, said piston acting zones, and said pumping pistons is three.
20. The vibration-reducing method as claimed in claim 2, wherein a number of said circumferential inlet mounts is three.
21. The vibration-reducing method as claimed in claim 2, wherein said fastening bores in said eccentric roundels are threaded bores and said fastening members are screws.
22. The vibration-reducing method as claimed in claim 2, wherein said cavity is formed by a bottom of an annular rib ring of the pump head cover being pressed onto a rim of the central outlet mount of the piston valvular assembly.
23. The vibration-reducing method as claimed in claim 1, wherein said motor is a brushed motor.
24. The vibration-reducing method as claimed in claim 1, wherein said motor is a brushless motor.
Type: Application
Filed: Dec 23, 2014
Publication Date: Jul 16, 2015
Inventors: Ying Lin CAI (Guangdong), Chao Fou HSU (Kaohsiung City)
Application Number: 14/580,639