WO2010113410A1 - ロータ駆動機構及びそれを備えるポンプ装置 - Google Patents
ロータ駆動機構及びそれを備えるポンプ装置 Download PDFInfo
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- WO2010113410A1 WO2010113410A1 PCT/JP2010/001946 JP2010001946W WO2010113410A1 WO 2010113410 A1 WO2010113410 A1 WO 2010113410A1 JP 2010001946 W JP2010001946 W JP 2010001946W WO 2010113410 A1 WO2010113410 A1 WO 2010113410A1
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- WIPO (PCT)
- Prior art keywords
- rotor
- shaft
- drive shaft
- drive mechanism
- joint
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C19/00—Sealing arrangements in rotary-piston machines or engines
- F01C19/005—Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/008—Pumps for submersible use, i.e. down-hole pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
- F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C15/0065—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0076—Fixing rotors on shafts, e.g. by clamping together hub and shaft
Definitions
- the present invention relates to a rotor drive mechanism that can be applied to a uniaxial eccentric screw pump capable of transporting various fluids such as gas, liquid, powder and the like, and a pump device including the same.
- the pump device 1 includes a uniaxial eccentric screw pump 2 and a rotor drive mechanism 4 for rotationally driving a rotor 3 provided on the uniaxial eccentric screw pump 2.
- the uniaxial eccentric screw pump 2 has a configuration in which the externally threaded rotor 3 is inserted into the internally threaded bore 5 a of the stator 5.
- a transfer fluid such as a liquid is sucked from, for example, the suction port 6, and the sucked transfer fluid is discharged by being held in the space between the rotor 3 and the stator 5 and transferred. It can be discharged from the outlet 7.
- the rotor 3 is configured to perform an eccentric rotational movement that rotates while revolving on the central axis 8 of the stator inner hole 5a shown in FIG. And it is the rotor drive mechanism 4 that enables the rotor 3 to perform the eccentric rotational movement in this manner.
- the rotor drive mechanism 4 shown in FIG. 6 includes a drive shaft 9 rotationally driven by a rotational drive unit (for example, an electric motor) 11 and a connecting shaft 10 connected to the tip of the drive shaft 9.
- the distal end of the connecting shaft 10 is connected to the rear end (proximal end) of the rotor 3.
- the front end of the connecting shaft 10 and the rear end of the rotor 3 are connected via the first joint portion (universal joint) 12, and the front end of the drive shaft 9 and the connecting shaft 10 And a rear end portion of the second joint portion (universal joint) 13 are connected to each other.
- the first and second joint portions 12 and 13 and the connecting shaft 10 are covered with a joint cover 14 made of synthetic rubber, for example.
- the joint cover 14 prevents the transfer fluid drawn from the suction port 6 into the fluid containing space 16 in the casing 15 from contacting the first and second joint parts 12 and 13 and the connecting shaft 10. is there.
- the second joint portion 13, the connecting shaft 10, and the first joint portion 12 are connected to the tip of the drive shaft 9, and these drive shaft 9 and the second joint Since the portions 13 and the like are arranged in series, the total dimension of the drive shaft 9, the second joint portion 13, the connecting shaft 10, and the first joint portion 12 in the length direction is equal to the total length of the pump device 1. It has become an element of making it longer.
- the pump device 1 shown in FIG. 6 is used, for example, as a dispenser, and such a dispenser is attached to, for example, the tip of a robot hand to apply liquid to the inner surface in a narrow space.
- a dispenser for example, the tip of a robot hand to apply liquid to the inner surface in a narrow space.
- Dispensers used for such coating operations are required to be miniaturized in order to improve workability.
- the present invention has been made to solve the above-mentioned problems, and it is possible to reduce the size in the longitudinal direction of the pump device, to reduce the volume of the fluid storage space in the casing, and to seal the seal. It is an object of the present invention to provide a rotor drive mechanism capable of extending the life of the pump and a pump device including the same.
- a rotor drive mechanism is a rotor drive mechanism for transmitting the rotation of a drive shaft rotationally driven at a constant position to a male screw type rotor of a uniaxial eccentric screw pump through a connecting shaft.
- the drive shaft has an inner space opening toward the rotor, and the connection shaft is inserted into the inner space, and the base end of the connection shaft is connected to the drive shaft, and the tip of the connection shaft is Part is connected to the rotor, and a first seal is formed between the inner peripheral surface of the opening toward the rotor side of the drive shaft and the proximal end of the rotor or the outer peripheral surface of the connecting shaft that performs eccentric rotational movement. It is characterized by having a structure sealed by a stop part.
- the connecting shaft can be used by connecting to the male screw type rotor of the uniaxial eccentric screw pump. That is, when the drive shaft is rotated in a predetermined direction, the rotation of the drive shaft is transmitted to the rotor via the connecting shaft, and the rotor can be made to make an eccentric rotational movement.
- the eccentric rotational movement of the rotor causes the space formed by the inner surface of the stator inner hole and the outer surface of the rotor to move from the one opening side of the stator inner hole toward the other opening side. Fluid can be transported in that direction.
- the connecting shaft is inserted into the inner space of the drive shaft, and the base end portion of the connecting shaft is connected to the drive shaft. Therefore, the rotor drive mechanism is such that the connecting shaft and the drive shaft overlap each other. The axial length of can be shortened.
- the first sealing portion seals between the inner peripheral surface of the opening of the drive shaft and the base end portion of the rotor or the outer peripheral surface of the connecting shaft, the transfer fluid is transferred to the inner space of the drive shaft Can be prevented from entering, and the volume of the fluid containing space in the casing can be reduced by the volume of the inner space.
- a rotor drive mechanism is the rotor drive mechanism according to the first aspect, wherein a tip end portion of the connection shaft and the rotor are connected via a first joint portion, and a base end portion of the connection shaft and the drive shaft Are connected via a second joint portion, and the first and second joint portions and the connection shaft are disposed in an inner space of the drive shaft sealed by the first sealing portion. It is characterized by
- first and second joint parts for example, joints including a universal joint can be used, and in the first sealing part, the first and second joint parts and the connecting shaft make contact with the transfer fluid. Can be prevented.
- the transfer fluid is corrosive, it is not necessary to select the material of the first and second joint parts and the connecting shaft from the corrosion resistant material, for example, high strength etc. You can choose one freely.
- the use range of the transfer fluid transferable by the uniaxial eccentric screw pump can be expanded.
- the rotor drive mechanism according to a third aspect of the present invention is the rotor drive mechanism according to the first aspect, wherein the base end portion of the connection shaft and the drive shaft are connected via a third joint portion, and the third joint portion and the connection shaft are It arrange
- a joint including an eccentric joint such as an Oldham joint can be used as the third joint portion, and the first sealing portion can prevent the third joint portion and the connecting shaft from contacting the transfer fluid.
- the transfer fluid is corrosive, for example, it is not necessary to select the material of the third joint portion and the connecting shaft from corrosion resistant materials, and it is possible to freely select suitable ones such as high strength ones. It can be selected.
- the use range of the transfer fluid which can be transferred by the uniaxial eccentric screw pump can be expanded without considering the adaptability of the material of the third joint portion and the connecting shaft and the transfer fluid.
- a rotor drive mechanism wherein the second joint portion of the second aspect or the third joint portion of the third aspect supports the drive shaft in a radial direction of the bearing portion. It is characterized in that it is disposed inside.
- a rotor drive mechanism is the rotor drive mechanism according to the fourth aspect, wherein the outer peripheral surface of the opening toward the rotor side of the drive shaft and the inner peripheral surface of the casing of the uniaxial eccentric screw pump are second It seals by a sealing part, It is characterized by the above-mentioned.
- the second sealing portion seals the gap between the outer peripheral surface of the drive shaft and the inner peripheral surface of the casing, thereby preventing the transfer fluid in the casing from flowing into the space on the bearing side. It is possible to reduce the volume of the fluid storage space in the casing. And since the runout of the drive shaft is prevented, the vibration due to runout is not applied to the second sealing portion. As a result, the life of the second seal portion is shortened by the runout of the drive shaft. Can be prevented, and the life of the rotor drive mechanism can be extended.
- a rotor drive mechanism is characterized in that in the second aspect, the first and second joint parts are universal joints.
- a rotor drive mechanism according to a seventh invention is characterized in that in the first invention, the connecting shaft is a flexible rod.
- the structure of the rotor drive mechanism can be simplified, and the downsizing, weight reduction and cost reduction can be achieved.
- a pump device comprises the rotor drive mechanism according to the first invention and the uniaxial eccentric screw pump.
- the axial length of the rotor drive mechanism can be shortened. Therefore, the axial length of the pump device to which the rotor drive mechanism is applied Can be shortened, and the size and weight can be reduced. For example, if the pump device to which this rotor drive mechanism is applied is attached to the tip of the robot hand as a dispenser and used, the workability in the case of applying the liquid to the inner surface in a narrow space is improved. Can.
- the inner space of the drive shaft is sealed by the first sealing portion so that the transfer fluid does not flow in, when the connecting shaft inserted in the inner space rotates and swings, the swinging of the connection shaft is caused. It is possible to prevent the rotation from being blocked by the transfer fluid. This can improve the accuracy of the discharge flow rate of the uniaxial eccentric screw pump driven by the rotor drive mechanism.
- FIG. 1 is a longitudinal sectional view showing a pump device according to a first embodiment of the present invention.
- FIG. 2 is a partially enlarged cross-sectional view showing a rotor drive mechanism provided in the pump device according to the first embodiment.
- FIG. 3 shows a first sealing portion attached to the rotor drive mechanism according to the first embodiment, FIG. 3 (a) is an AA enlarged longitudinal sectional view, and FIG. 3 (b) is an enlarged rear view It is.
- FIG. 4 shows another example of the first sealing portion mounted on the rotor drive mechanism according to the first embodiment, and FIG. 4 (a) is a BB enlarged longitudinal sectional view, FIG. 4 (b) Is an enlarged rear view.
- FIG. 5 is a partially enlarged cross-sectional view showing a rotor drive mechanism provided in a pump device according to a second embodiment of the present invention.
- FIG. 6 is a longitudinal sectional view showing a conventional pump device.
- the pump device 21 can revolve (rotate eccentrically) along a predetermined path while rotating the rotor 22 shown in FIG. 1, and thereby any fluid from, for example, low viscosity to high viscosity It can be transported and filled with high flow rate accuracy and long life.
- the pump device 21 includes a uniaxial eccentric screw pump 23, a rotational drive unit 24, and a rotor drive mechanism 25.
- the uniaxial eccentric screw pump 23 is a rotary displacement pump, and includes an internally threaded stator 26 and an externally threaded rotor 22.
- the stator 26, as shown in FIG. 1, is formed in a substantially short cylindrical shape having, for example, two internal thread-shaped inner holes 26a, and the longitudinal cross-sectional shape of the inner holes 26a is an oval. Rubber-like elastic body, or an engineering plastic such as a fluorine resin.
- the stator 26 is attached by being sandwiched between the nozzle 27 and the end of the first casing 28. A first opening 31 is formed in the nozzle 27, and a second opening 32 is formed in the first casing 28.
- the outer cylinder 33 is mounted between the nozzle 27 and the first casing 28.
- a needle nozzle 34 is attached to the tip of the nozzle 27, and the needle nozzle 34 is fastened to the nozzle 27 by a nut 35.
- the first opening 31 can be used as a discharge port (or suction port), and the second opening 32 can be used as a suction port (or discharge port).
- the first opening 31 communicates with the front end side opening of the inner hole 26a formed in the stator 26, and the second opening 32 communicates with the rear end side opening of the inner hole 26a. There is.
- a fluid storage space 36 is formed between the second opening 32 and the rear end side opening of the inner hole 26a.
- the rotor 22 is formed in, for example, a single thread of male thread, the longitudinal cross-sectional shape is substantially a true circle, and the pitch of the helical shape is set to half of the pitch of the stator 26 .
- the rotor 22 is made of metal such as stainless steel, for example, and is inserted into the inner hole 26 a of the stator 26.
- a rotor shaft 37 is formed at the rear end (base end) of the rotor 22.
- the rotor shaft 37 is included in the rotor drive mechanism 25.
- the rotor drive mechanism 25 is for transmitting the rotation of the rotation shaft 24 a rotationally driven by the rotation drive unit 24 to the externally threaded rotor 22 of the uniaxial eccentric screw pump 23.
- a connecting shaft 39 and a rotor shaft 37 are provided.
- the drive shaft 38 is rotatably provided on the inner surface of the second casing 29 via a bearing 40 such as a slide bearing.
- the drive shaft 38 is formed of a cylindrical member having a central hole 41, a large diameter portion 42 is formed at the tip end, an intermediate diameter portion 43 is formed at the central portion, and a small diameter portion 44 is formed at the rear end. ing.
- the small diameter portion 44 at the rear end of the drive shaft 38 is coupled to the rotation shaft 24 a of the rotation drive unit 24 by a coupling 45.
- An inner space 46 opening toward the rotor 22 is formed inside the large diameter portion 42 at the tip of the drive shaft 38, and the connecting shaft 39 is inserted into the central hole 41 including the inner space 46. There is.
- the connecting shaft 39 is a rod-like body having a predetermined length
- the rear end portion of the connecting shaft 39 is a central hole formed inside the middle diameter portion 43 of the drive shaft 38.
- the distal end portion is disposed in the inner space 46 formed inside the large diameter portion 42 of the drive shaft 38.
- the tip end of the connecting shaft 39 is connected to the rotor shaft 37 through the first joint portion 47, and the rear end of the connecting shaft 39 is the middle diameter portion 43 of the drive shaft 38 through the second joint portion 48. It is connected with.
- the first and second joint portions 47 and 48 are, for example, universal joints.
- the second joint portion 48 has a pair of coupling holes 49 formed in positions which radially face each other on the side wall of the cylindrical middle diameter portion 43, and the pair of coupling holes Both ends of the connecting pin 50 are attached to 49.
- the connection pin 50 is inserted into a connection hole 51 formed at the rear end of the connection shaft 39.
- the connection hole 51 is formed so as to expand in diameter in the axial direction of the connection shaft 39 as it goes to the two open end portions.
- the connecting shaft 39 is swingable around the axial center of the connecting pin 50, and the tip of the connecting shaft 39 is centered on the center of the connecting pin 50.
- the middle diameter portion 43 of the drive shaft 38 and the rear end portion of the connecting shaft 39 are connected so as to be able to swing in the vertical direction in FIG.
- a cylindrical sealing cover 52 is mounted on the outer peripheral surface of the middle diameter portion 43 of the drive shaft 38.
- the sealing cover 52 is for sealing the lubricating liquid filled in the inner space 46 of the drive shaft 38 and the central hole 41, and is disposed at a position covering the pair of coupling holes 49.
- two O-rings 53 are mounted on the outer peripheral surface of the middle diameter portion 43 so as to sandwich the pair of coupling holes 49 from both sides.
- the pair of coupling holes 49 are sealed by the inner peripheral surface of the sealing cover 52 configured in this manner and the two O-rings 53, and the inner space 46 of the drive shaft 38 and the central hole 41 are filled.
- the lubricating fluid is prevented from leaking out of the pair of coupling holes 49 to the outside of the drive shaft 38.
- a bearing portion 40 is mounted on the outer peripheral surface of the sealing cover 52, and the drive shaft 38 and the sealing cover 52 are rotatably supported by the bearing portion 40. That is, the connection pin 50 of the second joint portion 48 is disposed inward of the bearing portion 40 in the radial direction.
- the first joint portion 47 is equivalent to the second joint portion 48 and has a connecting cylindrical portion 54 coupled to the rotor shaft 37.
- the connecting cylindrical portion 54 has connecting holes 49 formed at positions facing each other in the radial direction, and both ends of the connecting pin 50 are attached to the pair of connecting holes 49.
- the connection pin 50 is inserted into a connection hole 51 formed at the tip of the connection shaft 39.
- the connection hole 51 is formed so as to expand in diameter in the axial direction of the connection shaft 39 as it goes to the two open end portions.
- the connecting shaft 39 is pivotable about the axial center of the connecting pin 50 as with the second joint portion 48, and the axial center of the connecting shaft 39
- the tip of the connecting shaft 39 and the rotor shaft 37 are connected so that the crossing angle (crossing angle in a plane parallel to the paper surface of FIG. 2) of the rotor 22 and the shaft center of the rotor 22 can be changed.
- a first sealing portion 55 is mounted on the outer peripheral surface of the rotor shaft 37.
- the first sealing portion 55 is formed of, for example, a rubber-like elastic body such as synthetic rubber, and an opening (a large diameter portion 42) opening toward the rotor 22 side of the drive shaft 38 and the outer peripheral surface of the rotor shaft 37. And the inner space 46 formed inside the large diameter portion 42 and the center hole 41. The space between them is sealed.
- the inner space 46 and the central hole 41 formed inside the drive shaft 38 are sealed by the first sealing portion 55 and the plug 56, and the sealed inner space 46 and the central hole are formed.
- the connecting shaft 39 and the first and second joint portions 47 and 48 are accommodated in the housing 41, and the lubricating fluid is enclosed therein.
- the first sealing portion 55 is an annular member and has a substantially Z-shaped cross section, and the outer wall portion 57, the inner side wall portion 58, and the connection are formed. It has a wall 59.
- the outer peripheral surface of the outer side wall portion 57 is formed to have a diameter slightly larger than the inner peripheral surface of the large diameter portion 42 of the drive shaft 38, and is closely attached to the inner peripheral surface of the large diameter portion 42.
- the inner peripheral surface of the inner side wall portion 58 is formed to have a diameter slightly smaller than the outer peripheral surface of the rotor shaft 37, and is mounted in close contact with the outer peripheral surface of the rotor shaft 37.
- the connecting wall portion 59 has a substantially frusto-conical shape, and connects the rear end portion of the outer side wall portion 57 and the tip end portion of the inner side wall portion 58.
- the inner side wall portion 58 is deformed so as to be movable in the radial direction so that the rotor 22 can freely perform the eccentric pivoting motion, and the fluid containing space
- the transfer fluid in 36 can be prevented from entering the inner space 46 and the central hole 41 formed inside the drive shaft 38, and furthermore, the lubrication enclosed in the inner space 46 and the central hole 41. Liquid can be prevented from leaking into the fluid containing space 36.
- the first sealing portion 55 does not rotate with the rotor 22 even in a state where the rotor 22 performs eccentric rotational movement, and is in close contact with the inner circumferential surface of the large diameter portion 42 of the drive shaft 38 in a stationary state. Is attached.
- the second sealing portion 61 is mounted in an annular gap between the outer peripheral surface of the large diameter portion 42 of the drive shaft 38 and the inner peripheral surface of the first casing 28, The annular gap is sealed by the second sealing portion 61.
- the second sealing portion 61 is made of, for example, an engineering plastic such as fluorocarbon resin or ultrahigh molecular weight polyethylene, and the fluid containing space 36 formed in the first casing 28 and the second sealing portion 61 The space between the rear bearing portion 40 and the space in which the rear bearing portion 40 is accommodated is sealed and partitioned.
- the second sealing portion 61 is an annular member and has a substantially U-shaped cross section.
- the outer peripheral surface of the second sealing portion 61 is formed to be slightly larger in diameter than the inner peripheral surface of the first casing 28, and is mounted in close contact with the inner peripheral surface of the first casing 28.
- the inner peripheral surface of the second sealing portion 61 is formed to have a diameter slightly smaller than the outer peripheral surface of the large diameter portion 42 of the drive shaft 38, and is mounted in close contact with the outer peripheral surface of the large diameter portion 42.
- the transfer fluid of the fluid containing space 36 in the first casing 28 can be prevented from entering the space on the bearing 40 side, and the fluid exists in the space on the bearing 40 side. It is possible to prevent foreign matter that may be intruding into the fluid containing space 36.
- the third casing 30 is disposed between the first casing 28 and the second casing 29 shown in FIG. 2, and the inner peripheral surface of the third casing 30 and the outer periphery of the large diameter portion 42 of the drive shaft 38.
- Another second sealing portion 62 is attached between the surface and the surface.
- the second sealing portion 62 has the same configuration as that of the second sealing portion 61, and operates in the same manner, and thus the description thereof is omitted.
- the rotation of the rotary drive unit 24 corresponds to the rotary shaft 24a and the drive shaft. It is transmitted to the rotor 22 of the uniaxial eccentric screw pump 23 via the 38, the second joint portion 48, the connecting shaft 39, the first joint portion 47, and the rotor shaft 37, and can rotate the rotor 22 in a predetermined direction. . Then, the rotor 22 can cause the liquid, which is a transfer fluid, to flow from the second opening 32 and discharge it from the needle nozzle 34 by performing the eccentric rotational movement.
- the space formed by the inner surface of the stator inner hole 26a and the outer surface of the rotor 22 by the eccentric rotational movement of the rotor 22 is the first opening from the opening on the second opening 32 side of the stator inner hole 26a. As it moves towards the opening on the 31 side, the transfer fluid can be transferred in that direction.
- the rotor 22 is configured to perform an eccentric rotational movement that rotates while revolving on the central axis 60 of the stator inner hole 26a shown in FIG. And it is the rotor drive mechanism 25 that enables the rotor 22 to perform the eccentric rotational movement in this manner.
- the connecting shaft 39 and the first and second joint portions 47 and 48 are disposed in the inner space 46 and the central hole 41 of the drive shaft 38.
- the rear end portion (the base end portion) of the second joint portion 48 is connected to the middle diameter portion 43 of the drive shaft 38 via the second joint portion 48.
- the axial length of the rotor drive mechanism 25 and hence the pump device 21 can be shortened by the amount by which the drive shaft 38 and the drive shaft 38 overlap with each other, and the pump device 21 can be reduced in size and weight.
- the pump device 21 to which the rotor drive mechanism 25 is applied is attached to the end of the robot hand as a dispenser and used, the workability in the application operation for applying liquid to the inner surface in a narrow space is good. can do.
- an annular gap between the inner peripheral surface of the opening formed in the large diameter portion 42 of the drive shaft 38 and the outer peripheral surface of the rotor shaft 37 is a first sealing portion 55. Therefore, it is possible to prevent the transfer fluid from entering the inner space 46 and the central hole 41 of the drive shaft 38, and the first casing is equivalent to the volume of the inner space 46 and the central hole 41.
- the volume of the fluid storage space 36 in 28 can be reduced. This is economical because, for example, the amount of transfer fluid in the fluid storage space 36 that is discarded during cleaning can be reduced.
- the inner space 46 and the central hole 41 are sealed by the first sealing portion 55 so that the transfer fluid does not flow into the inner space 46 and the central hole 41 formed in the drive shaft 38.
- the connection shaft 39 inserted in the sealed inner space 46 and the central hole 41 and the first and second joint parts 47, 48 can be prevented from contacting the transfer fluid. Therefore, when the connecting shaft 39 and the first and second joint portions 47 and 48 are rotated by the drive shaft 38 and oscillated, the swinging movement of the connecting shaft 39 and the first and second joint portions 47 and 48 is It is possible to suppress inhibition by the transfer fluid. Thus, the accuracy of the discharge flow rate of the uniaxial eccentric screw pump 23 driven by the rotor drive mechanism 25 can be improved.
- first and second joint parts 47 and 48 and the connecting shaft 39 can be prevented from coming into contact with the transfer fluid, even if the transfer fluid is corrosive, for example.
- the materials of the first and second joint parts 47 and 48 and the connecting shaft 39 from corrosion resistant materials, and suitable ones such as high strength ones can be freely selected.
- the second sealing portions 61 and 62 seal an annular gap between the outer peripheral surface of the large diameter portion 42 of the drive shaft 38 and the inner peripheral surface of the first casing 28.
- the transfer fluid in the first casing 28 can be prevented from flowing into the space on the bearing 40 side, whereby the volume of the fluid storage space 36 can be reduced.
- the life of the second sealing portion 61 is It is possible to prevent shortening due to runout of the drive shaft 38.
- first and second joint parts 47 and 48 are respectively universal joints, the rotation of the drive shaft 38 can be smoothly transmitted to the rotor 22 so that the rotor 22 can be accurately eccentrically pivoted.
- the accuracy of the discharge flow rate of the uniaxial eccentric screw pump 23 can be improved.
- FIG. 5 The difference between the pump device 65 according to the second embodiment shown in FIG. 5 and the pump device 21 according to the first embodiment shown in FIG. 2 is that in the first embodiment shown in FIG. 37 are connected via the second joint portion 48, the connecting shaft 39 and the first joint portion 47, but in the second embodiment shown in FIG. Connected through the Other than this, the second embodiment is equivalent to the first embodiment shown in FIGS. 1 and 2, and the same parts are indicated by the same reference numerals, and the description thereof will be omitted.
- the rotor 22 is eccentrically rotated similarly to the first embodiment, and the transfer fluid is discharged from the needle nozzle 34. can do.
- the connecting portion between the rear end portion (base end portion) of the flexible rod 66 and the middle diameter portion 43 of the drive shaft 38 is disposed inside the radial direction of the bearing portion 40 As in the first embodiment, it is possible to prevent the runout of the drive shaft 38.
- the structure of the rotor drive mechanism 67 can be simplified, and the compactness, light weight, and low cost can be achieved.
- the first sealing portion 55 is mounted on the outer peripheral surface of the rotor shaft 37.
- the rotor shaft 37 is omitted, and the flexible rod 66 is omitted.
- the first sealing portion 55 may be attached to the outer peripheral surface of the front end portion, and the axial length of the large diameter portion 42 of the drive shaft 38 may be shortened by the omission of the rotor shaft 37. In this manner, the axial length of the rotor drive mechanism 67 can be shortened by the amount of the rotor shaft 37, and hence the overall length of the pump device 65 can be shortened.
- the first sealing portion 55 shown in FIGS. 3 (a) and 3 (b) is used, but instead, it is shown in FIGS. 4 (a) and 4 (b).
- the first sealing portion 69 may be used.
- the difference between the first sealing portion 69 shown in FIGS. 4A and 4B and the first sealing portion 55 shown in FIGS. 3A and 3B is the connecting wall portions 70 and 59. Is the difference.
- the first sealing portion 69 shown in FIGS. 4 (a) and 4 (b) has a substantially U-shaped cross section and has an outer wall 57, an inner wall 58, and a connecting wall 70. There is.
- the connection wall 70 is a substantially annular plate-like body, and connects the tip of the outer wall 57 and the tip of the inner wall 58.
- the left side surface of the first sealing portion 69 faces the fluid containing space 36 formed in the first casing 28.
- the left side surface is formed as a flat surface by the connecting wall portion 70, even if, for example, a high viscosity transfer fluid in the fluid containing space 36 adheres to the left side surface of the first sealing portion 69. Since the attached fluid does not prevent the deformation of the first sealing portion 69, the rotor 22 can perform eccentric rotational movement accurately.
- the rotational shaft 24a of the rotational drive unit 24 may be configured to transmit rotational power to the drive shaft 38 by rotational power transmission means such as a gear, a toothed pulley and a toothed belt.
- the drive shaft 38 and the rotor shaft 37 are divided into a second joint portion 48 (universal joint), a connecting shaft 39, and a first joint portion 47 (universal joint).
- the drive shaft 38 and the rotor shaft 37 may be connected using an Oldham coupling (a third coupling portion not shown).
- the Oldham coupling is used as described above, for example, the rear end portion of the connecting shaft 39 shown in FIG. 2 and the middle diameter portion 43 of the drive shaft 38 are connected via the Oldham coupling.
- the Oldham coupling inward in the radial direction of the bearing portion 40 rotatably supporting the middle diameter portion 43 of the drive shaft 38, the drive shaft 38 is runout as in the first embodiment. Can be prevented. As a result, generation of vibration in the rotor drive mechanism can be prevented, and the life of the second sealing portions 61 and 62 can be extended.
- the rotor drive mechanism according to the present invention and the pump device including the same reduce the size in the longitudinal direction of the pump device and reduce the volume of the fluid storage space in the casing, and the seal portion
- the present invention is suitable for application to such a rotor drive mechanism and a pump device including the same.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
22 ロータ
23 一軸偏心ねじポンプ
24 回転駆動部
24a 回転軸
25 ロータ駆動機構
26 ステータ
26a ステータの内孔
27 ノズル
28 第1ケーシング
29 第2ケーシング
30 第3ケーシング
31 第1開口部
32 第2開口部
33 外筒
34 ニードルノズル
35 ナット
36 流体収容空間
37 ロータ軸
38 駆動軸
39 連結軸
40 軸受部
41 駆動軸の中心孔
42 駆動軸の大径部
43 駆動軸の中径部
44 駆動軸の小径部
45 カップリング
46 内側空間
47 第1継手部
48 第2継手部
49 結合孔
50 連結ピン
51 連結孔
52 封止カバー
53 Oリング
54 連結筒部
55 第1封止部
56 プラグ
57 外側壁部
58 内側壁部
59 連結壁部
60 中心軸
61、62 第2封止部
63 ラジアル荷重点
65 ポンプ装置
66 フレキシブルロッド
67 ロータ駆動機構
69 第1封止部
70 連結壁部
Claims (8)
- 中心が一定位置で回転駆動される駆動軸の回転を、連結軸を介して一軸偏心ねじポンプの雄ねじ型ロータに伝達するためのロータ駆動機構において、
前記駆動軸は、前記ロータ側に向かって開口する内側空間を有し、この内側空間に前記連結軸が挿入され、
前記連結軸の基端部が前記駆動軸と連結すると共に、前記連結軸の先端部が前記ロータと連結し、
前記駆動軸の前記ロータ側に向かう開口部の内周面と、偏心回動運動する前記ロータの基端部又は前記連結軸の外周面との間を第1封止部によって封止する構成としたことを特徴とするロータ駆動機構。 - 前記連結軸の先端部と前記ロータとが第1継手部を介して連結し、
前記連結軸の基端部と前記駆動軸とが第2継手部を介して連結し、
前記第1及び第2継手部、並びに前記連結軸が、前記第1封止部によって封止された前記駆動軸の内側空間内に配置されていることを特徴とする請求項1記載のロータ駆動機構。 - 前記連結軸の基端部と前記駆動軸とが第3継手部を介して連結し、
前記第3継手部及び前記連結軸が、前記第1封止部によって封止された前記駆動軸の内側空間内に配置されていることを特徴とする請求項1記載のロータ駆動機構。 - 請求項2記載の前記第2継手部、又は請求項3記載の前記第3継手部が、前記駆動軸を回動自在に支持する軸受部の半径方向の内側に配置されていることを特徴とするロータ駆動機構。
- 前記駆動軸の前記ロータ側に向かう開口部の外周面と、前記一軸偏心ねじポンプのケーシングの内周面との間を第2封止部によって封止したことを特徴とする請求項4記載のロータ駆動機構。
- 前記第1及び第2継手部は、それぞれユニバーサルジョイントであることを特徴とする請求項2記載のロータ駆動機構。
- 前記連結軸は、フレキシブルロッドであることを特徴とする請求項1記載のロータ駆動機構。
- 請求項1記載のロータ駆動機構と、前記一軸偏心ねじポンプとを備えることを特徴とするポンプ装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/258,134 US8556608B2 (en) | 2009-03-31 | 2010-03-18 | Rotor drive mechanism and pump apparatus including the same |
EP10758195.1A EP2416014B1 (en) | 2009-03-31 | 2010-03-18 | Rotor drive mechanism and pump apparatus including the same |
KR1020117023087A KR101315634B1 (ko) | 2009-03-31 | 2010-03-18 | 로터 구동 기구 및 그것을 구비하는 펌프 장치 |
CN201080011791.8A CN102356238B (zh) | 2009-03-31 | 2010-03-18 | 转子驱动机构及具备转子驱动机构的泵装置 |
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JP2009-085183 | 2009-03-31 | ||
JP2009085183A JP5360387B2 (ja) | 2009-03-31 | 2009-03-31 | ロータ駆動機構及びそれを備えるポンプ装置 |
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WO2010113410A1 true WO2010113410A1 (ja) | 2010-10-07 |
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PCT/JP2010/001946 WO2010113410A1 (ja) | 2009-03-31 | 2010-03-18 | ロータ駆動機構及びそれを備えるポンプ装置 |
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US (1) | US8556608B2 (ja) |
EP (1) | EP2416014B1 (ja) |
JP (1) | JP5360387B2 (ja) |
KR (1) | KR101315634B1 (ja) |
CN (1) | CN102356238B (ja) |
WO (1) | WO2010113410A1 (ja) |
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WO2013007813A1 (de) | 2011-07-13 | 2013-01-17 | Werner Luz | Verfahren und vorrichtung zur rückgewinnung von wärmeenergie aus coils |
JP2013199079A (ja) * | 2012-03-26 | 2013-10-03 | Heishin Engineering & Equipment Co Ltd | 触知プリンター |
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DE102010037440B4 (de) * | 2010-09-09 | 2014-11-27 | Seepex Gmbh | Exzenterschneckenpumpe |
DE102014100138B3 (de) * | 2014-01-08 | 2015-03-26 | Netzsch Pumpen & Systeme Gmbh | Exzenterschneckenpumpe, Bolzengelenk und Verfahren zum Herstellen eines Bolzengelenks |
CN108644111B (zh) * | 2018-04-11 | 2020-04-17 | 安徽埃斯克制泵有限公司 | 方便拆装的螺杆泵 |
US11371502B2 (en) | 2019-11-18 | 2022-06-28 | Graco Minnesota Inc. | Sealed drive for connecting progressive cavity pump rotors to universal joints |
KR102171148B1 (ko) * | 2019-12-30 | 2020-10-28 | 윤혁범 | 모노펌프 타입 액체정량토출장치 |
FR3114358B1 (fr) * | 2020-09-21 | 2022-09-16 | Pcm Tech | Pompe à cavités progressives et dispositif de pompage |
EP4008903B1 (de) * | 2020-12-04 | 2023-01-25 | ViscoTec Pumpen- und Dosiertechnik GmbH | Rotoreinheit und exzenterschneckenpumpe |
IT202100003137U1 (it) * | 2021-06-14 | 2022-12-14 | Settima Mecc S R L | Assieme di connessione per pompa volumetrica e pompa volumetrica comprendente detto assieme |
KR102622522B1 (ko) * | 2023-11-06 | 2024-01-11 | 디에이치 주식회사 | 자동차 구조용 접착제 디스펜서 |
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Also Published As
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EP2416014B1 (en) | 2022-12-21 |
KR101315634B1 (ko) | 2013-10-08 |
KR20110122871A (ko) | 2011-11-11 |
JP5360387B2 (ja) | 2013-12-04 |
CN102356238A (zh) | 2012-02-15 |
US20120039734A1 (en) | 2012-02-16 |
EP2416014A4 (en) | 2016-04-06 |
JP2010236424A (ja) | 2010-10-21 |
EP2416014A1 (en) | 2012-02-08 |
US8556608B2 (en) | 2013-10-15 |
CN102356238B (zh) | 2014-09-17 |
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