US20150337817A1 - Roundel structure for four-compression-chamber diaphragm pump with multiple effects - Google Patents

Roundel structure for four-compression-chamber diaphragm pump with multiple effects Download PDF

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US20150337817A1
US20150337817A1 US14/704,193 US201514704193A US2015337817A1 US 20150337817 A1 US20150337817 A1 US 20150337817A1 US 201514704193 A US201514704193 A US 201514704193A US 2015337817 A1 US2015337817 A1 US 2015337817A1
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Prior art keywords
roundel
eccentric
compression
mount
chamber
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Abandoned
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US14/704,193
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English (en)
Inventor
Ying Lin Cai
Chao Fou Hsu
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Individual
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Individual
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Priority to US14/704,193 priority Critical patent/US20150337817A1/en
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Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/14—Machines, pumps, or pumping installations having flexible working members having peristaltic action having plate-like flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B3/00—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams

Definitions

  • the present invention relates to a roundel structure for a four-compression-chamber diaphragm pump used in a reverse osmosis (RO) purification system of the type popularly installed on the water supplying apparatus in either a house, recreational vehicle or mobile home, and particularly to a compressing diaphragm pump with a sloped top ring that can eliminate the oblique pulling and squeezing phenomena of the pump so that the service lifespan of the four-compression-chamber diaphragm pump and the durability of key components therein are prolonged.
  • RO reverse osmosis
  • a brushed motor 10 with an output shaft 11 which includes a brushed motor 10 with an output shaft 11 , a motor upper chassis 30 , a wobble plate with an integral protruding cam-lobed shaft 40 , an eccentric roundel mount 50 , a pump head body 60 , a diaphragm membrane 70 , four pumping pistons 80 , a piston valvular assembly 90 and a pump head cover 20 .
  • the motor upper chassis 30 includes a bearing 31 through which an output shaft 11 of the motor 10 extends.
  • the motor upper chassis 30 also includes an upper annular rib ring 32 with several fastening bores 33 evenly and circumferentially disposed in a rim of the upper annular rib ring 32 .
  • the wobble plate 40 includes a shaft coupling hole 41 through which the corresponding motor output shaft 11 of the motor 10 extends.
  • the eccentric roundel mount 50 includes a central bearing 51 at the bottom thereof for receiving the corresponding wobble plate 40 .
  • Four tubular eccentric roundels 52 are evenly and circumferentially disposed on the eccentric roundel mount 50 .
  • Each tubular eccentric roundel 52 has a horizontal top face 53 , a female-threaded bore 54 and an annular positioning groove 55 formed in the top face thereof, as well as a rounded shoulder 57 created at the intersection of the horizontal top face 53 and a vertical flank 56 .
  • the pump head body 60 covers the upper annular rib ring 32 of the motor upper chassis 30 to encompass the wobble plate 40 and eccentric roundel mount 50 therein, and includes four operating holes 61 evenly and circumferentially disposed therein.
  • Each operating hole 61 has an inner diameter that is slightly bigger than the outer diameter of the corresponding tubular eccentric roundel 52 in the eccentric roundel mount 50 for respectively receiving the corresponding tubular eccentric roundel 52 .
  • a lower annular flange 62 is formed thereunder for mating with corresponding upper annular rib ring 32 of the motor upper chassis 30 , and several fastening bores 63 are evenly disposed around a circumference of the pump head body 60 .
  • the diaphragm membrane 70 which is extrusion-molded from a semi-rigid elastic material and placed on the pump head body 60 , includes a pair of parallel rims, including outer raised rim 71 and inner raised rim 72 , as well as four evenly spaced radial raised partition ribs 73 arranged such that each end of the radial raised partition ribs 73 connects with the inner raised rim 72 , thereby forming four equivalent piston acting zones 74 partitioned by the radial raised partition ribs 73 .
  • Each piston acting zone 74 has an acting zone hole 75 created therein in correspondence with a respective female-threaded bore 54 in the tubular eccentric roundel 52 of the eccentric roundel mount 50 , and an annular positioning protrusion 76 for each acting zone hole 75 is formed at the bottom side of the diaphragm membrane 70 (as shown in FIGS. 8 and 9 ).
  • Each pumping piston 80 is disposed in a corresponding one of the corresponding piston acting zones 74 of the diaphragm membrane 70 , and has a tiered hole 81 extending therethrough.
  • Piston valvular assembly 90 covers the diaphragm membrane 70 and includes a downwardly extending raised rim 91 for insertion between the outer raised rim 71 and inner raised rim 72 in the diaphragm membrane 70 , and a central dish-shaped round outlet mount 92 having a central positioning bore 93 with four equivalent sectors, each of which contains multiple evenly circumferentially-located outlet ports 95 .
  • the piston valvular assembly 90 also includes a T-shaped plastic anti-backflow valve 94 with a central positioning shank, and four circumferentially-adjacent inlet mounts 96 .
  • Each of the circumferentially-adjacent inlet mounts 96 includes multiple evenly circumferentially-located inlet ports 97 and an inverted central piston disk 98 respectively so that each piston disk 98 serves as a valve for each corresponding group of multiple inlet ports 97 .
  • the central positioning shank of the plastic anti-backflow valve 94 mates with the central positioning bore 93 of the central outlet mount 92 such that multiple outlet ports 95 in the central round outlet mount 92 are in communication with the four inlet mounts 96 .
  • a hermetically sealed preliminary-compression chamber 26 is formed between each inlet mount 96 and a corresponding piston acting zone 74 in the diaphragm membrane 70 upon insertion of the downwardly extending raised rim 91 into the gap ring between the outer raised rim 71 and inner raised rim 72 of diaphragm membrane 70 , such that one end of each preliminary-compressing chamber 26 is in communication with each of the corresponding inlet ports 97 (as shown in the enlarged portion of FIG. 10 ).
  • the pump head cover 20 which covers the pump head body 60 to encompass the piston valvular assembly 90 , pumping piston 80 and diaphragm membrane 70 therein, includes a water inlet orifice 21 , a water outlet orifice 22 , and several fastening bores 23 .
  • a tiered rim 24 and an annular rib ring 25 are disposed in the bottom inside of the pump head cover 20 such that the outer rim for the assembly of diaphragm membrane 70 and piston valvular assembly 90 can be hermetically attached to the tiered rim 24 (as shown in the enlarged portion of FIG. 11 ).
  • a high-compression chamber 27 is formed between the cavity formed by the inside wall of the annular rib ring 25 and the central outlet mount 92 of the piston valvular assembly 90 when the bottom of the annular rib ring 25 closely covers the rim of the central outlet mount 92 (as shown in FIG. 10 ).
  • FIGS. 11 and 12 are illustrative figures for the operation of the conventional four-compression-chamber diaphragm pump of FIGS. 1-10 .
  • the wobble plate 40 is driven to rotate by the motor output shaft 11 so that the four tubular eccentric roundels 52 on the eccentric roundel mount 50 constantly move in a sequential up-and-down reciprocal stroke.
  • the four pumping pistons 80 and four piston acting zones 74 in the diaphragm membrane 70 are sequentially driven by the up-and-down reciprocal stroke of the four tubular eccentric roundels 52 to move in an up-and-down displacement.
  • the squeezing phenomenon occurs because, among all of the distributed components of the rebounding force Fs, the maximum component force is exerted at the contacting bottom position P of the diaphragm membrane 70 with the rounded shoulder 57 of the horizontal top face 53 in the tubular eccentric roundel 52 so that the squeezing phenomenon at the bottom position P is also maximum, as shown in FIG. 18 .
  • each bottom position P of the piston acting zone 74 of the diaphragm membrane 70 suffers from the squeezing phenomenon at a frequency of four times per second. Under such circumstances, the bottom position P of the diaphragm membrane 70 is always the first broken place for the entire conventional four-compression-chamber diaphragm pump, which is an essential cause of not only shortening the service lifespan but also terminating the normal function of the conventional four-compression-chamber diaphragm pump.
  • An objective of the present invention is to provide a roundel structure for a four-compression-chamber diaphragm pump, in which the roundel structure is a cylindrical or inverted frustoconical eccentric roundel disposed on an eccentric roundel mount, and in which the roundel includes an annular positioning groove, a vertical or inverted frustoconical flank, and an annular top surface portion that is inclined relative to horizontal to form a sloped top ring between the annular positioning groove and the vertical or inverted frustoconical flank.
  • the sloped top ring By means of the sloped top ring, the high-frequency oblique pulling and squeezing phenomena that occurs in a conventional tubular eccentric roundel are completely eliminated because the sloped top ring flatly attaches to the bottom area of a corresponding piston acting zone of the diaphragm membrane.
  • Yet another objective of the present invention is to provide an eccentric roundel structure for a four-compression-chamber diaphragm pump, in which the eccentric roundel structure is a cylindrical or inverted frustoconical eccentric roundel disposed on an eccentric roundel mount, and in which the eccentric roundel includes an annular positioning groove, a vertical or inverted frustoconical flank, and a sloped top ring formed between the annular positioning groove and the vertical or inverted frustoconical flank.
  • FIG. 1 is a perspective assembled view of a conventional four-compression-chamber diaphragm pump.
  • FIG. 2 is a perspective exploded view of a conventional four-compression-chamber diaphragm pump.
  • FIG. 3 is a perspective view of an eccentric roundel mount for the conventional four-compression-chamber diaphragm pump.
  • FIG. 4 is a cross sectional view taken against the section line 4 - 4 from previous FIG. 3 .
  • FIG. 5 is a perspective view of a pump head body for the conventional four-compression-chamber diaphragm pump.
  • FIG. 6 is a cross sectional view taken against the section line 6 - 6 from previous FIG. 5 .
  • FIG. 7 is a perspective view of a diaphragm membrane for the conventional four-compression-chamber diaphragm pump.
  • FIG. 8 is a cross sectional view taken against the section line 8 - 8 from previous FIG. 7 .
  • FIG. 9 is a bottom view of a diaphragm membrane for the conventional four-compression-chamber diaphragm pump.
  • FIG. 10 is a cross sectional view taken against the section line 10 - 10 from previous FIG. 1 .
  • FIG. 11 is a first operation illustrative view of a conventional four-compression-chamber diaphragm pump.
  • FIG. 12 is a second operation illustrative view of a conventional four-compression-chamber diaphragm pump.
  • FIG. 13 is a third operation illustrative view of a conventional four-compression-chamber diaphragm pump.
  • FIG. 14 is a partially enlarged view taken from circled-portion-a of previous FIG. 13 .
  • FIG. 15 is a perspective exploded view of a the first exemplary embodiment of the present invention.
  • FIG. 16 is a perspective view of an eccentric roundel mount in the first exemplary embodiment of the present invention.
  • FIG. 17 is a cross sectional view taken against the section line 17 - 17 from previous FIG. 16 .
  • FIG. 18 is an assembled cross sectional view of the first exemplary embodiment of the present invention.
  • FIG. 19 is an operation illustrative view of the first exemplary embodiment of the present invention.
  • FIG. 20 is a partially enlarged view taken from circled-portion-a of previous FIG. 19 .
  • FIG. 21 is an illustrative view showing a comparison between the cylindrical eccentric roundel acting on the diaphragm membrane of the conventional four-compression-chamber diaphragm pump and that of the first exemplary embodiment of the present invention.
  • FIG. 22 is a perspective view for eccentric roundel mount in the second exemplary embodiment of the present invention.
  • FIG. 23 is a cross sectional view taken against the section line 23 - 23 from previous FIG. 22 .
  • FIG. 24 is an assembled cross sectional view for the second exemplary embodiment of the present invention.
  • FIG. 25 is an operation illustrative view of the second exemplary embodiment of the present invention.
  • FIG. 26 is a partially enlarged view taken from circled-portion-a of previous FIG. 25 .
  • FIG. 27 is an illustrative view showing a comparison between the cylindrical eccentric roundel acting on the diaphragm membrane for the conventional four-compression-chamber diaphragm pump and for the present invention in the second exemplary embodiment of the present invention.
  • FIG. 28 is a perspective exploded view for the third exemplary embodiment of the present invention.
  • FIG. 29 is a cross sectional view taken against the section line 29 - 29 from previous FIG. 28 .
  • FIG. 30 is a perspective assembled view for the third exemplary embodiment of the present invention.
  • FIG. 31 is a cross sectional view taken against the section line 31 - 31 from previous FIG. 30 .
  • FIG. 32 is an assembled cross sectional view for the third exemplary embodiment of the present invention.
  • FIG. 33 is an operation illustrative view for the third exemplary embodiment of the present invention.
  • FIG. 34 is a partially enlarged view taken from circled-portion-a of previous FIG. 33 .
  • FIG. 35 is an illustrative view showing a comparison between the cylindrical eccentric roundel acting on the diaphragm membrane for the conventional four-compression-chamber diaphragm pump and for the present invention in the third exemplary embodiment of the present invention.
  • FIGS. 15 through 18 are illustrative figures of a roundel structure for four-compression-chamber diaphragm pump according to a first exemplary embodiment of the present invention.
  • the roundel structure is a cylindrical eccentric roundel 52 mounted on the eccentric roundel mount 50 .
  • the cylindrical eccentric roundel includes an annular top surface portion that is inclined relative to horizontal to form a sloped top ring 58 between the annular positioning groove 55 and a vertical flank 56 , the sloped top ring 58 replacing the conventional rounded shoulder 57 in each tubular eccentric roundel 52 of the eccentric roundel mount 50 .
  • FIGS. 19 through 21 are illustrative figures for the operation of the roundel structure for four-compression-chamber diaphragm pump” in the first exemplary embodiment of the present invention.
  • the wobble plate 40 is driven to rotate by the motor output shaft 11 so that the four cylindrical eccentric roundels 52 on the eccentric roundel mount 50 constantly move in a sequential up-and-down reciprocal stroke.
  • the distribution of components of the rebounding force Fs is more linear because the sloped top ring 58 therein flatly attaches to the bottom area of the piston acting zone 74 for the diaphragm membrane 70 , so that the oblique pulling action is almost eliminated due to reduction in the squeezing phenomenon.
  • the rebounding force Fs is inversely proportional to the contact area so that the magnitudes of the distributed components of the rebounding force Fs for the cylindrical eccentric roundels 52 of the present invention, as shown in FIG. 20 , are substantially less than the magnitudes of the distributed components of the rebounding force Fs for the conventional tubular eccentric roundel 52 shown in FIG. 14 .
  • the improved distribution linearity and decreased magnitudes of the rebounding force components Fs are the result of forming the sloped top ring 58 between the annular positioning groove 55 and the vertical flank 56 in the eccentric roundel mount 50 , and in turn provides at least the following two advantages.
  • the improved force component distribution eliminates susceptibility to breakage of the diaphragm membrane 70 caused by the high frequency squeezing phenomena, that occurs in the conventional arrangement as a result of the rounded shoulder 57 in the otherwise horizontal top face 53 of the tubular eccentric roundel 52 .
  • Test results carried out on a prototype of the present invention are as follows.
  • FIGS. 22 through 24 are illustrative figures of a roundel structure for four-compression-chamber diaphragm pump in the second exemplary embodiment of the present invention
  • the roundel structure is an inverted frustoconical eccentric roundel 502 , again provided on an eccentric roundel mount 500 .
  • the frustoconical eccentric roundel 502 includes an integral inverted frustoconical flank 506 and a sloped top ring 508 such that the outer diameter of the frustoconical eccentric roundel 502 is enlarged but still smaller than the inner diameter of the operating hole 61 in the pump head body 60 , the sloped top ring 508 extending between an annular positioning groove 505 and the inverted frustoconical flank 506 .
  • FIGS. 25 through 27 are illustrative figures showing the operation of the “roundel structure for four-compression-chamber diaphragm pump” in the second exemplary embodiment of the present invention.
  • the wobble plate 40 is driven to rotate by the motor output shaft 11 so that the four frustoconical eccentric roundels 502 on the eccentric roundel mount 500 constantly move in a sequential up-and-down reciprocal stroke.
  • the four piston acting zones 74 in the diaphragm membrane 70 are sequentially driven by the up-and-down reciprocal stroke of the four frustoconical eccentric roundels 502 to move in up-and-down displacement.
  • the acting force F will obliquely pull the partial portion between the corresponding annular positioning protrusion 76 and outer raised rim 71 of the diaphragm membrane 70 .
  • the inclusion of the sloped top ring 508 in the eccentric roundel mount 500 eliminates breakage of the diaphragm membrane 70 caused by the high frequency squeezing phenomena and also causes the rebounding force Fs of the diaphragm membrane 70 caused by the acting force F to be tremendously reduced. Meanwhile, by means of the inverted frustoconical flank 506 , the possibility of collision between the frustoconical eccentric roundel 502 and the operating hole 61 in the pump head body 60 is eliminated even though the outer diameter of the frustoconical eccentric roundel 502 is enlarged.
  • the rebounding force Fs is inversely proportional to the contact area.
  • the contact area of the sloped top ring 508 with the bottom side of the diaphragm membrane 70 is increased (as indicated by ring A shown in FIG. 27 ) so that all distributed components of the rebounding force Fs for the inverted frustoconical eccentric roundels 502 of the present invention are further reduced.
  • the inverted frustoconical eccentric roundel 502 of this embodiment of the present invention therefore provides at least some of the following benefits:
  • the durability of the diaphragm membrane 70 for sustaining the high frequency pumping action is substantially increased as a result of the inverted frustoconical eccentric roundel 502 .
  • the service lifespan of the four-compression-chamber diaphragm pump is further prolonged because all distributed components of the rebounding force Fs for the inverted frustoconical eccentric roundels 502 of the present invention are reduced.
  • FIGS. 28 through 31 are illustrative figures of eccentric roundel structure for four-compression-chamber diaphragm pump in the third exemplary embodiment of the present invention, in which the eccentric roundel structure is a combinational eccentric roundel 502 in an eccentric roundel mount 500 .
  • the combinational eccentric roundel 502 includes a roundel mount 511 and an inverted frustoconical roundel yoke 521 in detachable separation such that the outer diameter of the frustoconical roundel yoke 521 is enlarged but still smaller than the inner diameter of the operating hole 61 in the pump head body 60 .
  • the roundel mount 511 has two layers that include a bottom-layer base with a positioning crescent surface 512 facing inwardly and a top-layer protruding cylinder 513 with a central female-threaded bore 514 .
  • the inverted frustoconical roundel yoke 521 is sleeved over the corresponding roundel mount 511 and includes an upper bore 523 , a middle bore 524 and a lower bore 525 stacked as a three-layered integral hollow structure, as well as an inverted frustoconical flank 522 and a sloped top ring 526 extending from the upper bore 523 to the inverted frustoconical flank 522 such that the bore diameter of the upper bore 523 is bigger than the outer diameter of the protruding cylinder 513 .
  • the bore diameter of the middle bore 524 is approximately equal to the outer diameter of the protruding cylinder 513 , such that the bore diameter of the lower bore 525 is approximately equal to the outer diameter of the bottom-layer base in the roundel mount 511 , and such that the crescent engages a corresponding surface of the lower bore to prevent relative rotation of the roundel yoke 521 and the corresponding roundel mount 511 .
  • a positioning annular groove 515 is formed between the protruding cylinder 513 and the inside wall of the upper bore 523 when the frustoconical roundel yoke 521 is sleeved over the roundel mounts 511 (as shown in FIGS. 30 and 31 ).
  • FIGS. 32 and 35 illustrate the manner in which the roundel structure for four-compression-chamber diaphragm pump third exemplary embodiment of the present invention is assembled.
  • the frustoconical roundel yoke 521 is fitted over the roundel mounts 511 .
  • each fastening screw 1 is inserted through a corresponding tiered hole 81 of the pumping piston 80 and each corresponding acting zone hole 75 in the piston acting zones 74 of the diaphragm membrane 70 , and then the fastening screw 1 is securely screwed into the four corresponding female-threaded bores 514 in the four roundel mounts 511 of the eccentric roundel mount 500 to firmly assembly the diaphragm membrane 70 and four pumping pistons 80 (as shown in FIG. 32 ).
  • FIGS. 33 and 34 illustrate the operation of the above-described the roundel structure for four-compression-chamber diaphragm pump of the third exemplary embodiment of the present invention.
  • the wobble plate 40 is driven to rotate by the motor output shaft 11 so that four combinational eccentric roundels 502 on the eccentric roundel mount 50 constantly move in a sequential up-and-down reciprocal stroke.
  • the four piston acting zones 74 in the diaphragm membrane 70 are sequentially driven by the up-and-down reciprocal stroke of the four combinational eccentric roundels 502 to move in up-and-down displacement.
  • the combinational eccentric roundel 502 in the present invention moves in an up stroke to displace the piston acting zone 74 upwardly, the acting force F will obliquely pull the partial portion between the corresponding annular positioning protrusion 76 and the outer raised rim 71 of the diaphragm membrane 70 .
  • the inclusion of the sloped top ring 526 in the inverted frustoconical roundel yoke 521 of the eccentric roundel mount 500 eliminates susceptibility to breakage of the diaphragm membrane 70 caused by the high frequency squeezing phenomena (as shown in FIGS. 33 and 34 ) and also causes the rebounding force Fs of the diaphragm membrane 70 caused by the acting force F to be tremendously reduced (as shown in FIG. 34 ).
  • the rebounding force Fs is inversely proportional to the contact area.
  • the contact area of the sloped top ring 508 with the bottom side of the diaphragm membrane 70 is increased (as indicated by ring A shown in FIG. 35 ) so that all distributed components of the rebounding force Fs for the inverted frustoconical roundel yoke 521 of the present invention are further reduced.
  • roundel mount 511 and eccentric roundel mount 500 are fabricated together as an integral body.
  • the frustoconical roundel yoke 521 is independently fabricated as a separate entity.
  • the contrivance of the combinational eccentric roundel 502 not only meets the requirement of mass production but also reduces the overall manufacturing cost.
  • the eccentric roundel 502 with frustoconical roundel yoke 521 of the present invention provides at least some of the following benefits:
  • the durability of the diaphragm membrane 70 for sustaining the high frequency pumping action is substantially increased by including the inverted frustoconical roundel yoke 521 .
  • the service lifespan of the four-compression-chamber diaphragm pump is further prolonged because all distributed components of the rebounding force Fs for the inverted frustoconical roundel yoke 521 of the present invention are further reduced.
  • the illustrated embodiments of the invention thus provide a cylindrical eccentric roundel 52 , an inverted frustoconical eccentric roundel 502 , or combinational eccentric roundel 502 that, among other advantages, increases the service lifespan of the diaphragm membrane 70 so that the service lifespan of the four-compression-chamber diaphragm pump can be doubled.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US14/704,193 2014-05-20 2015-05-05 Roundel structure for four-compression-chamber diaphragm pump with multiple effects Abandoned US20150337817A1 (en)

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US14/704,193 US20150337817A1 (en) 2014-05-20 2015-05-05 Roundel structure for four-compression-chamber diaphragm pump with multiple effects

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EP3158194A4 (fr) 2018-02-07
EP3158194A1 (fr) 2017-04-26

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