JP2013530669A - Pump magnet housing with integrated sensor element - Google Patents

Pump magnet housing with integrated sensor element Download PDF

Info

Publication number
JP2013530669A
JP2013530669A JP2013513351A JP2013513351A JP2013530669A JP 2013530669 A JP2013530669 A JP 2013530669A JP 2013513351 A JP2013513351 A JP 2013513351A JP 2013513351 A JP2013513351 A JP 2013513351A JP 2013530669 A JP2013530669 A JP 2013530669A
Authority
JP
Japan
Prior art keywords
pump
magnet
sensor
housing
driven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2013513351A
Other languages
Japanese (ja)
Inventor
ジェイ. グライムス、デイビッド
エフ. カー、チャールズ
Original Assignee
マイクロポンプ インク ア ユニット オブ アイデックス コーポレーションMICROPUMP,INC.,A Unit of IDEX Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US39671510P priority Critical
Priority to US13/151,188 priority patent/US20110293450A1/en
Priority to US13/151,188 priority
Application filed by マイクロポンプ インク ア ユニット オブ アイデックス コーポレーションMICROPUMP,INC.,A Unit of IDEX Corporation filed Critical マイクロポンプ インク ア ユニット オブ アイデックス コーポレーションMICROPUMP,INC.,A Unit of IDEX Corporation
Priority to PCT/US2011/038952 priority patent/WO2011153367A1/en
Publication of JP2013530669A publication Critical patent/JP2013530669A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors

Abstract

【Task】
A liquid pump driven by a magnet has one or more sensors that do not contact (dry) the pumped liquid, and further includes a conduit or chamber that normally extends in the direction of liquid flow. Do not use fixed seals that are attached. The sensor monitors the fluid inside the pump and feedback control. By coupling the sensor to the electrical circuit that controls the pump, the number of wires placed outside the motor housing is reduced and the assembly is stiffened. This is advantageous when used in a dangerous environment or in a liquid immersion state. Pumps and fluid systems reduce the number of leaks in more severe pumping conditions and maintain improved performance compared to conventional pumps and systems.
[Selection] Figure 2

Description

  The present disclosure relates to various types of pumps driven by magnets. More specifically, the present invention relates to a pump in which a rotary or rotary reciprocating element such as a pump gear is held in a magnet housing (magnet cup), and a magnet wetted by a liquid pumped up by the pump is connected to a driven magnet.

  Conventional fluid systems include one or more pumps that facilitate the flow of liquid. Such systems have sensors or indicators that measure various parameters such as the pressure, temperature, and conductivity of the liquid flowing through the system. Conventional indicators include Bourdon tube pressure gauges, ball flow meters, analog thermometers and equivalent equipment that measure the respective parameters. A “sensor” typically includes a transducer that converts a sensed parameter (eg, pressure or temperature) into a corresponding signal (eg, an electrical or optical signal). Such sensors typically receive data directly from the transducer and, if necessary, for example, electrical circuits that process measured values used in parameters and control circuits into data used by other electronic devices. It is included. This measured value is used, for example, for parameter display (eg, LED screen). Other examples of controlling the electrical circuit include a controller that is connected and configured to implement feedback control or other control of the motor, or an actuator that provides power to the pump.

  In a fluid system that includes a pump, the pump is generally a separate component, i.e., the pump and other components are separate so that other components, flow tubes, etc. can be incorporated into the original system of the manufacturer (OEM). Manufactured and sold. Similarly, sensors and indicators are separate components and are configured and sold for OEM sales according to various applications. Such a configuration works in most fluid systems where space is not a particular constraint. However, some fixed seals are generally required when connecting conventional separated components to a fluid circuit. When used in permanent applications, the components may be placed by welding. Usually a highly functional fixed seal is used, but it is very difficult or impossible to remove the welded components. For most applications, the stationary seal is configured to allow the component to be removed from the system accordingly. Examples of fixed seals for such purposes include elastomeric O-rings, ring seals, gaskets, and the like. However, these are classic types of fixed seals that increase the occurrence of liquid leakage. In systems that are submerged and used, liquids that contain harmful substances, or systems that need to maintain a hazardous environment and stable operation over a long period of time, the risk of leakage is an important issue.

  Depending on how the fluid circuit is used, it is desirable to make the pumps, indicators, sensors, conduits, and similar components as compact as possible. In other uses, a high level of rigidity is desired for the component. Sometimes it is necessary to achieve both compactness and rigidity at the same time. However, it is a challenge to achieve rigidity at the same time by increasing compactness. This is a challenge not only in typical fluid systems, but also in pumps and other components used in such systems.

  Efforts to make fluid systems compact and stiff increase the difficulty of using separate components such as pumps and sensors. Our challenges include the establishment and retention of a suitable seal, such as a fixed seal that separates the interior of the pump housing from the external environment or extends from the outside toward the fluid flow path. Another challenge includes placing and connecting components more closely within the system. For example, the arrangement of stand-alone pressure sensors at the inlets and outlets of miniaturized pumps occupies excessive space and distorts the arrangement, so that substantial components are forcibly arranged. Such an arrangement places significant stress on the components and / or their respective housings, sacrifices the seal, and affects the overall reliability and / or life of the component. Indeed, miniaturization and the use of essential seals may eliminate use in conventional flow sensors in fluid systems.

Special table 2010-538207 gazette

  The pump system disclosed in the present invention has been developed as a result of seeking improvement in a specific use form that requires miniaturization and rigidity of the pump. In particular, by integrating at least one sensor into a part of the material pressure barrier (housing) of the pump, the integrated pump and sensor can be miniaturized and without the addition of a fluid connection. Therefore, it is possible to reduce the possibility of liquid leakage.

  When a rotary pump unit (for example, a combination of a drive gear and a driven gear of a gear pump) is operated magnetically, the rotary pump unit is configured to rotate in the vertical axis direction when driven by the drive magnet. Connected to the driven magnet. Since the driven magnet is hermetically disposed in the magnet housing (magnet cup), the magnet is immersed in the liquid pumped in the driving state and is isolated from the external environment. As a result, the location where the liquid flows is limited to the location where the pump is driven, and there is no need to use a seal that prevents liquid leakage. The ability to decouple the rotating environment from the stator environment is a major advantage of pumps driven by magnets.

  In adding a sensor to a pump driven by a magnet, in controlling the operation of the pump (in a feedback control type sensor) or in storing and / or communicating data (in a liquid monitoring type sensor) The challenge of how to make the electrical connection between them generally remains. In some liquid sensors that make electrical connections with wires, the electrical connection wires are designed to pass through holes in the walls that contain the liquid (through holes), so that the liquid contacts and the electronics The need to prevent damage occurs. The addition of through holes and seals can cause liquid leakage from the formation of wires added to the motor housing, increasing the possibility of moisture and contaminants entering the electronic motor, resulting in a weaker pump . By integrating one or more sensor transducers into the magnet cup, the need for a separate component to act as a sensor is reduced, and consequently no fixed seal is required. In the magnet cup of the embodiments of the present disclosure, one or more sensors need to be indirectly in contact with the pumped liquid, and usually attached with the sensor, attached to a fluid tube or chamber, and extended to the fluid passageway. Do not use a fixed seal.

  Furthermore, the volume due to the stand-alone components occupying the housing can be reduced, resulting in a significantly compacted assembly. For example, by integrating with sensor electronics on the printed circuit board outside the end wall of the magnet cup (with sensor transducer attached to the printed circuit board and sensing the respective parameters through the end wall of the magnet cup), assembly Is made more compact and the reliability is further improved. For this reason, the electronic part of the sensor is directly coupled with minimal or no wires, and the electronic part placed on a printed circuit board, for example, in a housing with a stator driven by a magnet, is driven by a motor. Control. By integrating the sensor into the magnet cup wall, the overall pump assembly is more rigid than conventional pump systems due to the reduced number of wires in the motor housing. Such a configuration is suitable for use in a dangerous environment or in a liquid immersion form.

  Although the pump system disclosed in the present invention is a gear pump, the pump system in the disclosed sensor device is not limited to a gear pump. Rather, the present disclosure includes various types of pumps having at least one mobile pump element housed in a housing that is joined to a permanent magnet driven by a magnetic force generated from the outside of the housing. , Directed to the magnet through the wall of the housing. The magnet is installed in a portion of the housing called the magnet housing, or magnet cup. In a pump in which the mobile element is a rotary element, the magnet and the magnet cup are configured to rotate in the longitudinal direction of the magnet when installed in a rotating magnetic field. Finally, the driven magnet has a substantially cylindrical shape, and the magnet cup has a substantially cylindrical shape with a cavity (like a can), in which the driven magnet is Retained. The driven magnet is driven by a driving magnet coupled to the armature of the motor, or driven by a driving stator located outside the magnet cup. Magnetic field lines generated by the drive magnet or stator pass through the wall of the magnet cup and are inductively coupled to the driven magnet. When the pump is driven, the magnetic field lines encourage the driven magnet to rotate in the axial direction, thus causing the rotary pump element to rotate. In a gear-shaped pump, the rotary pump is called a “drive gear” and is driven in combination with a driven gear. As the drive gear rotates, the corresponding driven gear rotates in the opposite direction. The combined gear rotation generates pump energy. The gear pump is, for example, what is conventionally known as a “cavity style mold” or includes, for example, a “suction shoe mold” or a combination thereof.

  Another type of pump that includes a mobile pump element coupled to a driven magnet includes a piston pump. In some forms of piston pumps, the piston performs rotational and linear reciprocating motions when magnetically driven. Examples of other pumps include a centrifugal pump, a lobe pump, or a pump having a pressure-resistant portion inside the housing.

  As described above, the pump housing serves as a physical barrier for the pump, such as separating the interior of the pump from the external environment (or vice versa). Leakage (liquid leakage) occurs when liquid flows out from the inside of the physical barrier. The pumps and fluid systems described in this disclosure reduce the number of liquid leaks in more severe pumping conditions and maintain improved performance over time as compared to conventional pumps and systems.

  Because the magnet cup forms part of the pump housing, in various embodiments of the present invention, at least one sensor is integrated into the wall of the magnet cup. For this reason, there is no worry of getting wet with the pumped liquid. Such an “integrated sensor” is not a separate component, but is substantially coupled to the magnet cup as it functions as part of the cup. Various types of integrated sensors that sense and respond to parameters through the wall, part of the wall of the magnet cup, or other liquid barrier are coupled to the wall of the magnet cup. Sensors are pressure sensors, temperature sensors, or sensors such as conductivity sensors, pressure sensors, turbidity sensors, flow rate (viscosity) sensors, pH sensors, oil-soluble sensors, or turbidity, dissolved ions, optical adsorption, etc. At least one of a liquid variable sensor and a sensor for detecting a rotating element of a pump motor. The conductivity sensor is used, for example, to stop the pump when a “dry operation” condition occurs. The rotation sensor is used, for example, to sense the direction of rotation or whether the pump element is driving when the motor controller does not have a sensor. An example of a rotation sensor is the Hall effect. Oil-soluble sensors are used as a system for controlling degassing. Examples of the sensor include a strain gauge sensor, a capacitance sensor, a resistance sensor, a piezoelectric sensor, and an electrode such as an ion electrode. The sensor is connected to other electronic components by conventional conductors (wires, pins or equivalent), depending on the sensor type and normal form, or by wireless connection. Other Hall effect sensors detect the mechanical movement of one or more internal magnet elements. The inductive sensor includes, for example, a voice coil and / or an acoustic signal that measures precise position movement. Another example inductive sensor receives and / or transmits an RF signal.

  In the embodiment of the present disclosure, the sensor attached to the end wall of the magnet cup is described. However, the position of the sensor does not have to be a specific wall of the magnet cup, and may not be arranged on the magnet cup. Good. For example, the sensor may be located at the inlet portion (eg, sensing pressure from the inlet) or outlet portion (eg, sensing pressure from the outlet) of a pump disposed in the magnet cup. For example, direct welding, separate membrane welded, overmolding, adhesive mounting, etc., can be used to integrate the sensor by mounting the sensor on the wall of the magnet cup or other area of the pump housing. Fixing by sealing, clamping, mechanical joining, and methods of integrating directly into the wall by welding or casting. Most types of sensors do not contact the liquid in the pump. For example, a pressure sensor based on a strain gauge can sense pressure through a thin-walled noodle magnet cup or a thinned area of the magnet cup. Such a sensor transducer may be coupled to the “non-perforated” wall of the magnet cup. A preferred method of attaching the capacitive sensor is resistance welding to a non-magnetic wall (eg end wall) or a magnet cup made of injection molded polymer.

FIG. 1 shows an internal structure of a pump having a pump head and a housing and driven by a magnet. The sensor transducer is integrated into the magnet cup wall and connected to the printed circuit board. FIG. 2 shows the internal structure of a compact pump having a pump head and a housing and driven by a magnet. The sensor transducer is located in a dry cavity facing the wall of the magnet cup and is not wetted by the pumped liquid. Integrated sensor transducers are connected to adjacent printed circuit boards by wires, or connected to adjacent electrical components without the use of wires. FIG. 3 shows the internal structure of a compact pump having a pump head and a housing and driven by a magnet. The sensor transducer is integrated into the wall of the magnet cup, and the dry portion of the sensor transducer sidewall is connected to the printed circuit board. FIG. 4 is a first perspective view of a magnet cup used in the embodiment of FIG. 3, wherein the integrated sensor transducer is connected to an axially arranged printed circuit board. FIG. 5 is a second perspective view of the magnet cup illustrated in FIG. 4. FIG. 6 is a first cross-sectional view showing components at the end of the magnet cup shown in FIG. FIG. 7 is a third perspective view of the magnet cup illustrated in FIG. 4 and illustrates a driven magnet. FIG. 8 is a second cross-sectional view of the magnet cup illustrated in FIG. 4 and illustrates a driven magnet. FIG. 9 is an enlarged perspective view showing a coaxial component of the magnet cup shown in FIG. FIG. 10 is a first perspective view of a modification of the magnet cup shown in FIG. FIG. 11 is a second perspective view of the magnet cup illustrated in FIG. 10. FIG. 12 is a first cross-sectional view of the end of the magnet cup used in the embodiment of FIG. 10, where the sensor transducer is placed in a dry cavity located on the end wall of the magnet cup, Connected by wires nearby. FIG. 13 is a third perspective view of the magnet cup illustrated in FIG. 10 and illustrates a driven magnet. FIG. 14 is a second cross-sectional view of the magnet cup shown in FIG. 10, and shows a cross-sectional view of the driven magnet. FIG. 15 is an enlarged perspective view showing components that are coaxial with the magnet cup shown in FIG. 13. FIG. 16 is a perspective view of an embodiment of a magnet cup, in which a sensor is integrated into the side wall. FIG. 17 is a side view of a magnet cup in which a sensor is integrated at the end of the magnet cup using a fixed seal. FIG. 18 is an enlarged view of the magnet cup and the sealed sensor shown in FIG. FIG. 19 is a block diagram of hardware and software components used as an example of a feedback control system for monitoring and controlling a pump.

  The above-mentioned and added parts, performance, and advantages of the present invention will be further clarified by referring to details described below and the accompanying drawings.

  FIG. 1 shows a pump assembly 10 according to a first embodiment including a drive unit 12 and a pump head unit 14. The pump head 14 includes an inlet port 16, an outlet port 18, a drive gear 20, a shaft 22, a driven magnet (driven magnet) 24, and a magnet cup 26. The magnet cup 26 is disposed inside the drive unit 12. The magnet cup 26 has a side wall 26a and an end wall 26b that surround the driven magnet 24 in a coaxial manner. The side walls 26a and end walls 26b separate the driven magnet 24 (usually immersed in pumped liquid as in the pump head 14) from the electrical portion of the assembly so that it is in a "dry" or assembled liquid. It plays the role of keeping the wet condition. Of the pump head 14 and the magnet cup 26, the internal structure wetted by the liquid forms a “pump housing”. The stator 32 is located outside the pump housing and surrounds the magnet cup 26 in a coaxial manner, that is, is magnetically coupled to the driven magnet 24 via the side wall 26a of the magnet cup 26. The stator 32 is placed in the enclosure 34. Since the enclosure 34 is located outside the pump housing 34, it is in a “dry” state. According to the embodiment of FIG. 1, the pump head 14 is attached to the enclosure 34 from end to end, so that most of the pump head 14 extends from the drive 12.

  A sensor transducer 28 is attached to the end wall 26b, and the sensor transducer 28 is a surface that is highly sensitive to parameters (eg, a surface that responds in a measurable manner to parameters that are highly sensitive to the sensor). )have. In the present embodiment, the sensor converter 28 is attached in a sealed manner (sealed) so that the surface with high parameter sensitivity faces the driven magnet 24. In the “sealed” state, the sensor transducer 28 is positioned in contact with the mounting surface at at least one or more connection points to prevent liquid from passing through the surface by the barrier. It is a form to prevent. This barrier is constituted by, for example, the surface itself, an O-ring, an absorbent, an adhesive, or the like. The sensor converter 28 as a component at the time of purchase may be of a type that operates in a state (wet state) in contact with a liquid. However, in various embodiments detailed in this disclosure, the sensor transducer can operate (or is specifically configured to operate) in a dry state, i.e., not wet with the pumped liquid. It is preferable. At least the parameter sensitive surface may be incorporated into the wall of the magnet cup. The sensor converter 28 in this embodiment is electrically connected to a printed circuit board 30 located outside the magnet cup 28. The printed circuit board 30 has an electric circuit for detecting a conversion signal from the sensor converter 28 and adjusting the signal so that it can be used for other electronic devices (not shown) such as an electronic driver of the stator 32. ing. For example, the converted signal is used as feedback control for driving electrons of the stator 32.

  FIG. 2 shows an embodiment of a pump assembly 50 configured to occupy less space than the embodiment of FIG. The pump assembly 50 includes a drive unit 52 and a pump head 54. The pump head 54 includes an inlet port 56, an outlet port 58, a drive gear 60, a driven gear 61, a shaft 62 for attaching the drive gear in the axial direction, a driven magnet 64, and a magnet cup 66. . The magnet cup 66 has a side wall 66a and an end wall 66b that surround the driven magnet 64 in a coaxial manner. A sensor converter 68 is attached to the end wall 66b. The sensor converter 68 is mounted so that the parameter-sensitive surface faces the inside of the magnet cup and senses the parameter from the end wall 66b. The other part of the sensor transducer 68 extends from the magnet cup 66. The sensor converter 68 is electrically connected to the printed circuit board 70. The stator 72 surrounds the magnet cup 66 located outside the pump housing in a coaxial manner, and is magnetically coupled to the driven magnet 64 via the side wall 66a of the magnet cup 66. The stator 72 is held inside an enclosure 74 having a printed circuit board 70. The sensor converter 68 may be connected to a printed circuit board (PCB) 70 by a wire (not shown). Alternatively, the sensor transducer 68 may be connected to the PCB 70 by a wire-free method, for example, transmitting data to the PCB 70 by radio frequency (RF) or infrared (IR) signals. The printed circuit board 70 preferably includes not only the electronics for receiving and adjusting the transducer signal from the sensor transducer 68 but also preferably the drive electronics for the stator 72. In this embodiment, a portion of the pump housing is located inside the thick wall of the enclosure 74, thus reducing the relative volume occupied by the pump assembly 50.

  FIG. 3 illustrates another embodiment of a pump assembly 100 configured to occupy a small volume. The pump assembly 100 includes a drive unit 102 and a pump head 104. The pump head 104 includes an inlet port 106, an outlet port 108, a driven gear 110, a driving gear 111, a shaft 112 attached to the driving gear 111 in an axial direction, a driven magnet 114, and a magnet cup 116. including. The magnet cup 116 has a side wall 116a and an end wall 116b that surround the driven magnet 114 in a coaxial manner. An end wall 116 b is attached to the sensor converter 118. The sensor converter 118 is mounted so that the surface with high parameter sensitivity faces the driven magnet 114 and does not get wet with the liquid held in the magnet cup. The other part of the sensor transducer 118 extends from the magnet cup to the first printed circuit board 120. The stator 122 surrounds the magnet cup 116 located outside the pump housing in a coaxial manner, and is magnetically coupled to the driven magnet 114 via the side wall 116a of the magnet cup. The stator 122 is disposed inside an enclosure 124 having a printed circuit board 120 to which the sensor converter 118 is attached. The first printed circuit board 120 is connected to the second printed circuit board 121 by conductive pins 121. The first printed circuit board 120 has electronic parts for receiving and adjusting the transducer signals from the sensor converter 118, and the second printed circuit board 126 has drive electrons for the stator 122. In this embodiment, at least a portion of the pump head 104 extends into the wall of the enclosure 124 to reduce the overall volume occupied by the pump assembly 100.

  The magnet cup 116 is formed of various rigid materials that do not have a magnet. For example, the magnet cup 116 may be formed of a metal or alloy that does not have a magnet, in which case the magnet cup is formed by machining, deep drawing, integral molding, or the like. As another example, the magnet cup is formed by machining or casting with a polymer or copolymer material. The polymer or copolymer material is reinforced by a material suitable for formation that does not have fibers, particles, or other magnets. The magnet cup formed from the copolymer may be transparent or translucent so that the wavelength of the electromagnetic radiation can be selected, so that the optical properties and morphology of the liquid that the dry sensor is pumped through the wall of the magnet cup. Can be detected.

  An example of a magnet cup 150 formed of metal is shown in FIG. 4, and the illustrated cup is a cylindrical body 152. The cylindrical body 152 has an attachment flange 154 for attaching the cup to the pump head (see FIG. 4). The cylindrical body 152 further has an end plate 156, which is joined so that the surface of the sensor transducer 158 with high parameter sensitivity faces the inside of the magnet cup. The opposite (facing outward) surface of the sensor transducer 158, which is visible in the drawing, is connected to a groove in the printed circuit board 162 by a pin 160. The printed circuit board 162 has a male connector 164, whereby the printed circuit board is electrically connected to a printed circuit board (not shown) of another electronic part. The magnet cup 150 of FIG. 4 shown at another angle in FIG. 5 is similar to the configuration of the magnet cup 26 and magnet cup 116 shown in FIGS. In FIG. 6, the cross-sectional view of FIG. 5 will be described in more detail. In FIG. 6, a cylindrical body 152, an end plate 156 of the magnet cup 150, a sensor converter 158, a printed circuit board 162, and connection pins 164 are illustrated. Further, the cover 166 is formed so as to cover the sensor converter 158 and the printed circuit board 162, and the pins 164 are formed so as to protrude from the cover 166 and extend. The cup 150 shown in FIG. 4 is similar to the cup 156 of FIG. 6, but FIG. 4 does not have a cover 166. Similarly, the cup 26 of FIG. 1 has a cover, while the cup 116 of FIG. 3 does not have a cover.

  As shown in the embodiment of FIG. 6, the sensor transducer 158 is hermetically integrated with the end plate 156 so that the sensor transducer 158 contacts and is surrounded by the printed circuit board 162. As a result, the electronic signal transmitted from the sensor converter 158 is transmitted to the printed circuit board 162 of the hardware component through the pin 160 (see FIG. 4) without separately forming a connection wire and an associated through hole. Since the sensor transducer 158 is integrated into the dry surface of the thin plate 156, it acts as a septum separating the dry and wet environments, and the sensor transducer 158 can sense at least one or more liquid parameters. State. By placing the sensor transducer 158 adjacent to the wet surface, the sensor transducer 158 serves as a “dry” sensor to prevent contact with the pumped liquid. By integrating the sensor transducer 158 into the plate 156 and connecting the sensor transducer to the printed circuit board 162, a reliable, mechanically rigid unit is formed in which transmission of sensor data is electrically stable.

FIG. 7 is another perspective view of the magnet cup 150, which includes a cover 166. A cross-sectional view of the magnet cup 150 and the driven magnet 122 is shown in FIG. FIG. 9 is an enlarged view of the magnet cup 150, and the inside of the magnet cup 150 is configured to have pressure resistance. The detailed configuration is disclosed in U.S. Patent Publication No. 2009-0060728 (corresponding Japanese application: Special Table 2010-523172) filed on August 29, 2008 by the applicant of the present application. 4A, 4B, 5, and paragraphs 42-48 and 53-60. These features include a plug 168 (foamed fluorosilicone) and a retainer 170.
Furthermore, a driven magnet 172 and a retainer shoe 174 are shown.

  FIG. 10 describes an embodiment of a magnet cup 200 welded with a rigid polymer material, and the illustrated cup includes a cylindrical body 202. The cylindrical body 202 has a mounting flange 204 for mounting the cup to a pump head (not shown). The cylindrical body 202 further has a reinforcing rib 206 and an end wall 208 to which the sensor vibrating portion 210 is joined, and is arranged so that a surface with high parameter sensitivity faces the inside of the magnet cup. The end wall 208 further has a reinforcing rib 212. The sensor converter 210 has a pin 214, and the sensor converter is electrically connected to a printed circuit board (not shown). The magnet cup of FIG. 10 is similar to the magnet cup 66 of FIG.

  Details of the magnet cup 200 are described in FIGS. 11 and 12, and a part of the cylindrical body 202 is shown in the end wall 208. The cavity 216 is formed in the end wall 208 and the sensor transducer 210 is hermetically attached (eg, using an adhesive) so that the sensor transducer 210 operates as a dry sensor. 13 is another perspective view of the magnet cup 200, and FIG. 14 is a cross-sectional view of the magnet cup 200 of FIG. Further details are described in FIG. 15, and a structure in which the inside of the magnet cup 200 has pressure resistance is also described. These features include a plug 218 (fired fluorosilicone) and a retainer 220. Further, a driven magnet 222 and a retainer shoe 224 are shown.

  FIG. 16 is a variation of the magnet cup 230 having a side wall 232, an end wall 234, a mounting flange 236, and an assembly 238 with at least one or more dry sensors 240. In this embodiment, sensor assembly 238 is integrated into sidewall 232 rather than end wall 234. Each sensor 240 is attached to a ring on the outer periphery of the magnet cup 230, and these are formed so as to protrude from the surface of the magnet cup 230. Alternatively, sensor 240 is configured as a mini- or micro-mechanical sensor that is attached to the interior or surface of cylinder 232. The sensor assembly 238 is configured as a thin ring shape as shown or an outer cylinder that is coaxial with the side wall 232.

  FIGS. 17 and 18 are modifications of the magnet cup 250, which includes a side wall 252, an end wall 254 thicker than the side wall 252, a mounting flange 256, and a dry sensor 258. In this embodiment, sensor 258 is inserted toward end wall 254 and secured by cover 260 and seal 262. The seal 262 is an adhesive, a gasket, an O-ring, or the like.

  FIG. 19 illustrates an example of a feedback control system 300 for a self-regulating pump assembly that includes one or more sensor components as described above. For example, the feedback control system 300 is used to maintain a predetermined temperature or pressure associated with the pump assembly. As described above, all components of the control system are placed in the pump assembly without the addition of a housing, wire or seal. In this figure, a software unit 302 and a hardware unit 304 are shown. The illustrated software unit 302 includes an integral control unit 306 and a proportional control unit 308 that are used in a general feedback control system. The illustrated hardware unit 304 includes a digital / analog converter (DAC) 310, an analog / digital converter (ADC) 312, and a motor controller (BLDC) 314 that drives a motor stator (BLDC motor) 316. A pump 318 and at least one sensor component 320.

  In performing feedback control to the pump 318 based on the measurement value received from the sensor component 320, the measured feedback signal 322 received from the sensor component 320 is converted into the first digital feedback signal 324 by the ADC 312, and the software unit 302 Processed by. The added data from the external source is combined with the first digital feedback signal 324 by the second digital feedback signal 326. The first multiplexer 328 combines the digital feedback signals 324 and 326 and performs processing by the control units 306 and 308. Proportional control signal 330 and integrated control signal 332 are combined by second multiplexer 334 to form integral control signal 336. The integrated control signal 336 is transmitted to the DAC 310 and converted into an analog control signal 338. The analog control signal 338 is processed by the BLDC controller 314 and sent sequentially to the motor 316 at appropriate times to control the performance of the pump 318.

Given the many embodiments in which the disclosed inventive method can be applied, the depicted embodiments are only preferred examples of the invention and are not intended to limit the aspects of the invention. Rather, aspects of the invention are defined by the appended claims. Therefore, we claim our invention in these claims.

Claims (27)

  1. A pump head including a sealed pump housing;
    A movable pump portion disposed within the pump housing;
    A driven magnet connected to the pump unit, wherein the driven magnet induces movement of the pump unit by movement induced by the driven magnet;
    A magnet housing corresponding to the pump housing and holding the driven magnet, wherein when the driven magnet is induced to move in the magnet housing, the inside of the driven magnet and the magnet housing is A magnet housing wetted by the liquid pumped by the induced movement of the pump part;
    At least one sensor element mounted hermetically corresponding to the wall of the magnet housing and configured not to wet the liquid;
    A driving magnet disposed outside the magnet housing and magnetically coupled to the driven magnet, wherein a fluctuating magnetic field generated by the driving magnet induces a movement of the driven magnet, A drive magnet for inducing movement of the pump part of
    A pump assembly comprising:
  2.   The pump assembly of claim 1, wherein the sensor element is integrated into a wall of the magnet housing.
  3.   The pump assembly of claim 1, wherein the sensor element is hermetically mounted within the wall.
  4.   The pump assembly of claim 1, wherein the sensor element is hermetically attached to the wall.
  5.   The pump assembly of claim 1, wherein the sensor element is hermetically mounted inside the wall.
  6.   The pump assembly of claim 1, wherein the sensor element includes a transducer.
  7. The wall of the magnet housing includes a dry surface and a wet surface;
    The wetted surface is in contact with the liquid inside the magnet housing;
    The pump assembly of claim 1, wherein the sensor element does not contact a liquid inside the magnet housing.
  8.   The pump assembly of claim 1, wherein the sensor element is disposed within a cavity of the wall of the magnet housing.
  9.   The pump assembly of claim 1, further comprising an electrical connection to the sensor element.
  10.   The pump assembly of claim 1, wherein the integrated sensor element is electrically connected wirelessly.
  11. The pump unit has a drive gear and a driven gear driven by a combination of the drive gear,
    The pump assembly of claim 1, wherein the drive gear is coupled to the driven magnet.
  12. The magnet housing is constituted by a cylindrical body and an end wall,
    The sensor element is integrated into the end wall;
    The pump assembly of claim 1, wherein the sensor element is surrounded by a printed circuit board and has a rigid connection to the sensor element.
  13.   The pump assembly of claim 1, further comprising a printed circuit board electrically connected to the sensor element.
  14.   The pump assembly of claim 1, wherein the drive magnet includes a stator.
  15. A motor housing having the stator;
    The pump assembly according to claim 12, further comprising: an electric part that is disposed in the motor housing and is electrically connected to the stator to drive the stator.
  16.   The sensor element is a pressure transducer, a temperature transducer, a flow rate transducer, a conductivity transducer, a rotation detection transducer, an oil-soluble transducer, a pH transducer, a turbidity transducer, a dissolved ion transducer, an optical adsorption transformation. The pump assembly of claim 1, wherein at least one is selected from the group of generators and combinations thereof.
  17.   The sensor element of claim 1, wherein the sensor element is selected from the group of strain transducers, capacitive transducers, resistive transducers, piezoelectric transducers, magnetically coupled transducers, Hall effect transducers, and electrodes. Pump assembly.
  18.   The sensor element can be directly welded, laser welded, bonded to separate membranes, brazed, overmolded, adhesively attached, sealed by clamping, clamped, mechanically coupled, welded to the wall of the magnet housing, and The pump assembly of claim 1, wherein the pump assembly is hermetically mounted by casting and selected from a group of direct integration.
  19.   The pump assembly of claim 1, wherein the pump section is selected from the group of a pump gear, a centrifuge, a lobe pump, and a piston.
  20.   The pump assembly according to claim 1, further comprising a pressure-resistant portion inside the pump housing.
  21. The sensor element is a pressure transducer;
    The sensor element according to claim 1, wherein the sensor element is disposed at a pump inlet portion of the magnet housing for sensing an inlet pressure, or is disposed at an outlet portion of the magnet housing for sensing an outlet pressure. Pump assembly.
  22. A sensor electrical circuit disposed outside the pump housing and electrically connected to the sensor element;
    A drive circuit disposed outside the pump housing and connected to the drive magnet;
    A controller electrically connected to the sensor electrical circuit and the drive circuit, wherein the drive magnet is operated and the pump unit is controlled based on data provided from the sensor electrical circuit to the controller The pump assembly of claim 1, wherein the controller is configured to:
  23. A sealed pump housing;
    A pump portion disposed within the housing;
    A driven magnet disposed in the housing and connected to the pump portion, wherein the driven magnet induces a corresponding movement of the pump portion by an induced movement of the driven magnet;
    A portion corresponding to the pump housing and holding the driven magnet, wherein the movement of the driven magnet is induced in the magnet housing, and the inside of the driven magnet and the magnet housing is A magnet housing that wets the liquid pumped by the movement induced by the pump;
    A pump head having at least one sensor element that senses at least one parameter of the liquid pumped by the pump section and is hermetically attached to the wall of the magnet housing.
  24. The sensor element comprises a parameter sensitive surface having the function of measuring the properties of the pumped liquid;
    24. A pump head according to claim 23, wherein the sensor element is integrally mounted on the wall of the magnet housing such that the surface sensing the parameter is located towards the interior of the magnet cup.
  25.   24. The sensor element according to claim 23, wherein the sensor element is integrally attached to the wall of the magnet housing so that the sensor element is adjacent to a wet surface that contacts the liquid inside the magnet cup. Pump head.
  26. A method of controlling a fluid system driven by a magnet by separating a pumped liquid from an electrical component driving the pump by means of a pump housing including a magnet housing:
    Providing a sensor to be attached to the wall of the magnet housing so that the sensor does not get wet with the liquid;
    Using the sensor to measure at least one parameter of the liquid to generate a measurement signal;
    Providing said measurement signal as a control signal for said electronic component, said control signal being a signal having at least one characteristic of the measured value of said parameter and responsively responsive to said electrical component;
    Based on the control signal, the electrical component is triggered to generate a drive change corresponding to the pump; a method of controlling a fluid system.
  27. Pump element means magnetically coupled to the driven magnet means;
    Pump housing means for storing said pump element means separate from the external environment and in contact with the pumped liquid and having housing means for said driven magnet means;
    Driving magnet means disposed outside the housing means for inducing movement of the driven magnet means and inducing movement of the pump element means in the housing means;
    Parameter sensing means coupled to the housing means and measuring at least one element without contact with the liquid;
    Pump control means connected to the parameter sensing means for receiving data relating to the measured element and generating a corresponding pump control signal;
    Means for adjusting the operation of the pump in response to the pump control signal.
JP2013513351A 2010-06-01 2011-06-02 Pump magnet housing with integrated sensor element Withdrawn JP2013530669A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US39671510P true 2010-06-01 2010-06-01
US13/151,188 US20110293450A1 (en) 2010-06-01 2011-06-01 Pump magnet housing with integrated sensor element
US13/151,188 2011-06-01
PCT/US2011/038952 WO2011153367A1 (en) 2010-06-01 2011-06-02 Pump magnet housing with integrated sensor element

Publications (1)

Publication Number Publication Date
JP2013530669A true JP2013530669A (en) 2013-07-25

Family

ID=45022294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013513351A Withdrawn JP2013530669A (en) 2010-06-01 2011-06-02 Pump magnet housing with integrated sensor element

Country Status (7)

Country Link
US (1) US20110293450A1 (en)
EP (1) EP2417353A4 (en)
JP (1) JP2013530669A (en)
KR (1) KR20140074789A (en)
BR (1) BR112012030665A2 (en)
CA (1) CA2801495A1 (en)
WO (1) WO2011153367A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015200347A (en) * 2014-04-07 2015-11-12 三菱電機株式会社 Range changeover device
WO2018021232A1 (en) * 2016-07-27 2018-02-01 日本電産トーソク株式会社 Electric pump

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224750A1 (en) 2002-06-04 2003-12-24 Fresenius Medical Care De Gmbh Device for the treatment of a medical fluid
US8197231B2 (en) 2005-07-13 2012-06-12 Purity Solutions Llc Diaphragm pump and related methods
US8192401B2 (en) 2009-03-20 2012-06-05 Fresenius Medical Care Holdings, Inc. Medical fluid pump systems and related components and methods
CN102497895A (en) 2009-07-15 2012-06-13 弗雷塞尼斯医疗保健控股公司 Medical fluid cassettes and related systems and methods
US9624915B2 (en) 2011-03-09 2017-04-18 Fresenius Medical Care Holdings, Inc. Medical fluid delivery sets and related systems and methods
EP3006059B1 (en) 2011-04-21 2017-09-27 Fresenius Medical Care Holdings, Inc. Medical fluid pumping systems and related devices and methods
KR101898758B1 (en) * 2011-10-31 2018-09-13 엠 펌프스 에스알엘 Device for transmitting power through rotating magnetic fields
MX359107B (en) * 2011-12-07 2018-09-14 Flow Control LLC Pump using multi voltage electronics with run dry and over current protection.
US9610392B2 (en) 2012-06-08 2017-04-04 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
US9500188B2 (en) * 2012-06-11 2016-11-22 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
US9130413B2 (en) 2012-07-25 2015-09-08 Nidec Motor Corporation Electric motor having a partially sealed housing
DE102012218012A1 (en) * 2012-10-02 2014-04-03 Alfmeier Präzision AG Baugruppen und Systemlösungen Housing with two plastic housing parts
US20140161651A1 (en) * 2012-12-11 2014-06-12 Micropump, Inc, a Unit of IDEX Corporation Compact integrated-drive pumps
US9561323B2 (en) 2013-03-14 2017-02-07 Fresenius Medical Care Holdings, Inc. Medical fluid cassette leak detection methods and devices
WO2014145018A2 (en) * 2013-03-15 2014-09-18 Levant Power Corporation Active vehicle suspension improvements
WO2014179394A1 (en) * 2013-05-01 2014-11-06 Flow Control Llc. Pump using multi voltage electronics with run dry and over current protection
DE102013018159A1 (en) * 2013-12-05 2015-06-11 Klaus Union Gmbh & Co. Kg Slit pot and method for producing the same
DE102015117562A1 (en) * 2014-10-16 2016-04-21 Johnson Electric S.A. Gear pump
USD861733S1 (en) * 2016-04-11 2019-10-01 Robert Bosch Gmbh Hydraulic power unit
DE102016114540A1 (en) * 2016-08-05 2018-02-08 Eckerle Industrie-Elektronik Gmbh Electrohydraulic machine with integrated sensor
CN109789253A (en) * 2016-09-23 2019-05-21 心脏器械股份有限公司 Sensor is located at the blood pump on surface of shell
CN109385642A (en) * 2017-08-04 2019-02-26 林信涌 Gas generator
FR3078115A1 (en) * 2018-02-22 2019-08-23 Wilo Intec Circulating pump of a fluid with non-intrusive pressure measurement

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387313A (en) * 1981-04-22 1983-06-07 Mitsubishi Denki Kabushiki Kaisha Molded submersible motor
US5096390A (en) * 1990-10-16 1992-03-17 Micropump Corporation Pump assembly with integral electronically commutated drive system
US5181837A (en) * 1991-04-18 1993-01-26 Vickers, Incorporated Electric motor driven inline hydraulic apparatus
EP0722044B1 (en) * 1995-01-11 2002-05-15 Micropump Incorporated Integral pump and flow meter device
US5961293A (en) * 1995-05-19 1999-10-05 Uis, Inc In-take fuel pump assembly with unitary control unit for internal combustion engines
JP4493061B2 (en) * 1999-04-22 2010-06-30 油研工業株式会社 Hydraulic pump with built-in electric motor
EP1085210A3 (en) * 1999-09-13 2004-03-31 Siemens Aktiengesellschaft Pump with temperature sensor on the housing
AUPR806801A0 (en) * 2001-10-03 2001-10-25 Davey Products Pty Ltd Pump control system
US7001158B2 (en) * 2003-01-24 2006-02-21 Sturman Industries, Inc. Digital fluid pump
US7411326B2 (en) * 2005-05-17 2008-08-12 Federal Mogul World Wide, Inc. BLDC motor and pump assembly with encapsulated circuit board
US8591198B2 (en) * 2007-05-22 2013-11-26 Metropolitan Industries, Inc. Strain gauge pump control switch
KR101826534B1 (en) * 2007-08-30 2018-03-22 마이크로펌프, 아이엔씨. Pumps and pump―heads comprising internal pressure―absorbing member
US7654804B2 (en) * 2008-01-08 2010-02-02 Chu Henry C Fluid displacement apparatus having pressure sensing device
US7789049B2 (en) * 2008-07-14 2010-09-07 Honda Motor Co., Ltd. Variable capacity water pump via electromagnetic control
FR2936844A1 (en) * 2008-10-02 2010-04-09 Inergy Automotive Systems Res Rotary pump for vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015200347A (en) * 2014-04-07 2015-11-12 三菱電機株式会社 Range changeover device
US9234581B2 (en) 2014-04-07 2016-01-12 Mitsubishi Electric Corporation Range switching device
WO2018021232A1 (en) * 2016-07-27 2018-02-01 日本電産トーソク株式会社 Electric pump

Also Published As

Publication number Publication date
KR20140074789A (en) 2014-06-18
CA2801495A1 (en) 2011-12-08
WO2011153367A1 (en) 2011-12-08
BR112012030665A2 (en) 2017-06-13
EP2417353A1 (en) 2012-02-15
US20110293450A1 (en) 2011-12-01
EP2417353A4 (en) 2013-10-09

Similar Documents

Publication Publication Date Title
JP5511936B2 (en) Pressure measurement module
RU2649032C1 (en) Transmitting pressure sensor of technological fluid medium with a stand sensor and electronics of the sensor
US9046428B2 (en) Pressure detection module and pressure sensor device having such a pressure detection module
US9279709B2 (en) Sensor device for detecting a flow property of a fluid medium
KR101236678B1 (en) Pressure sensor device
EP1980830B1 (en) Pressure sensor device including temperature sensor contained in common housing
EP1967782B1 (en) Quick connector
EP2002233B1 (en) High temperature pressure transmitter assembly
DE10360406B3 (en) Hall effect sensor for vehicle fuel tank level gauge, measures field from moving magnet and is connected by lead to supply or evaluation instrument
JP4249193B2 (en) Semiconductor pressure sensor device
JP6171694B2 (en) Torque detection device and electric power steering device
DE102013113337A1 (en) Fuel pump module with integrated control device
US7478560B2 (en) Sensor apparatus responsive to pressure and temperature within a vessel
US7159464B2 (en) Pressure sensor
AU775608B2 (en) Pressure sensor module
JP5634026B2 (en) Differential fluid pressure measuring device
US9360017B2 (en) Pump assembly having an integrated user interface
DE60301073T2 (en) Insert sprayed unit of a pressure transducer with a pressure vessel
EP2136193A2 (en) Pressure sensor device
DE102007054905B4 (en) Rotation angle sensors and throttle devices
EP1949524B1 (en) Gear drive unit comprising a plug-in electronics module
US9719875B2 (en) Low profile pressure sensor
US20030233881A1 (en) Sensor assembly
EP3111184B1 (en) Differential pressure sensing die
US8164007B2 (en) Conductive elastomeric seal and method of fabricating the same

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140529

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20140529

A761 Written withdrawal of application

Free format text: JAPANESE INTERMEDIATE CODE: A761

Effective date: 20150120

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20150120