EP2994639A1 - Elektromechanische pumpe - Google Patents
Elektromechanische pumpeInfo
- Publication number
- EP2994639A1 EP2994639A1 EP14719308.0A EP14719308A EP2994639A1 EP 2994639 A1 EP2994639 A1 EP 2994639A1 EP 14719308 A EP14719308 A EP 14719308A EP 2994639 A1 EP2994639 A1 EP 2994639A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- pressure increasing
- increasing tube
- inlet
- intermediate chamber
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 78
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/12—Valves; Arrangement of valves arranged in or on pistons
- F04B53/125—Reciprocating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Definitions
- the present invention relates to an electromechanical pump, and in particularly, but not exclusively, to an electromechanical pump which comprises a pressure increasing tube which is arranged within a main spring used to move a piston in the pump. There is further provided a corresponding method of manufacturing an electromagnetic pump.
- Figure 7a shows a longitudinal-section view of a known
- the electromagnetic pump 70 currently used in the art.
- the electromagnetic pump 70 comprises a piston 71 which is made from ferromagnetic material.
- a pressure increasing tube 75 is further provided; the pressure increasing tube 75 is integral to the piston 71 so that the piston 71 and pressure increasing tube 75 are defined by a single component.
- the piston 71 defines a channel 81 through which fluid can flow from an inlet 82 to the pressure increasing tube 75 and into an intermediate chamber 77. Fluid can flow from the intermediate chamber to an outlet 79.
- the piston 71 is biased towards a first position by means of a main spring 78.
- the electromagnetic pump 70 further comprises a coil 73; when current is passed through the coil 73, a magnetic field is generated which forces the piston 71 towards a second position.
- the electromagnetic pump 70 further comprises a first valve 76 which controls the flow of fluid from the pressure increasing tube 75 into an intermediate chamber 77.
- a second valve 74 is provided, which controls the flow of fluid from the intermediate chamber 77 to an outlet 79.
- Moving the piston towards its second position creates a vacuum in the intermediate chamber 77 which causes the first valve 76 to open, , thus allowing fluid to flow from the inlet 82, through the channel 81 in the piston 71 , into the pressure increasing tube 75, and into the intermediate chamber 77.
- Moving the piston 71 to its first position closes the first valve 76, increases the pressure within the intermediate chamber 77; the increase in pressure within the intermediate chamber 77 causes the first valve 76 is forced to close and the second valve 74 to open causes.
- the increase in pressure with an intermediate chamber 77 causes the fluid within the intermediate chamber 77 to force the second valve to open, thus enabling fluid to flow from the intermediate chamber 77 to the outlet 79.
- Figure 7b shows the electromagnetic pump 70 when piston 71 in its second position
- Figure 7c shows the electromagnetic pump 70 when the piston in its first position.
- each of the main spring 78, pressure increasing tube 75 and piston 71 are distributed along the length of the electromagnetic pump 70, each at a different, exclusive, position along the length of the electromagnetic pump 70. Accordingly the electromagnetic pump 70 is long and not compact enough for certain applications.
- main spring 78, pressure increasing tube 75 and piston 71 are coaxial, to allow the piston 71 to smoothly move between its first and second position.
- main spring 78, pressure increasing tube 75 and piston 71 are each distributed along the length of the electromagnetic pump 70, at different, exclusive, positions, these components are more susceptible to becoming displaced from being coaxial with one another if a force is applied to an end of the
- electromagnetic pump 1 For example, a force may be applied to and end of the electromagnetic pump 1 when screwing the end of the
- electromagnetic pump 1 to a structure to secure the electromagnetic pump 1 to the structure; this force may cause displacement of the pressure increasing tube 75 so that it is no longer coaxial with the main spring 78 and piston 71 .
- the pressure increasing tube 75 is integral to the piston 71 so that the piston 71 and pressure increasing tube 75 are defined by a single component, it is difficult to make the piston 71 and pressure increasing tube 75 from different materials.
- an electromagnetic pump comprising, an inlet; an outlet; an intermediate chamber located between said inlet and said outlet; a first valve for controlling the flow of fluid into the intermediate chamber, and a second valve for controlling the flow of fluid out of the intermediate chamber; a piston, at least a part of which comprises ferromagnetic material, located between the inlet and outlet, and including a channel through which fluid can flow, wherein the piston is moveable between a first and second position to control the opening and closing of the first and second valves; a main spring which is arranged to exert a force against said piston to bias the piston towards its first position; a coil for generating an electromagnetic field for moving said piston towards its second position, against the biasing force exerted by said main spring; a pressure increasing tube with an inner diameter which is smaller than an inner diameter of the inlet, so fluid flowing from the inlet into the pressure increasing tube is pressurized; wherein said at least a portion of the length of the pressure increasing tube is located within said main spring.
- locating at least a portion of the length of the pressure increasing tube within said main spring ensures that at least part of the pressure increasing tube and at least a part of the main spring share same position along the length of the electromagnetic pump, thus reducing the length electromagnetic pump. Furthermore, the pressure increasing tube will now be located in a more central position along the length of the electromagnetic pump thus ensuring that the pressure increasing tube is less susceptible to becoming displaced, from being coaxial with the piston, by a force applied to an end of the electromagnetic pump.
- intermediate chamber can pass from the intermediate chamber to the outlet.
- pressure within said intermediate chamber is reduced when the first valve is open and the piston is moved towards its first position, so that fluid can flow from the inlet into the intermediate chamber.
- pressure within said intermediate chamber is increased when the first valve is closed and the piston is moved towards its second position, to compresses a fluid within said intermediate chamber, so that said compressed fluid can flow from the intermediate chamber towards the outlet.
- the main spring is preferably a helical spring.
- the intermediate chamber may be separated from said inlet by a first valve and from said outlet by a second valve.
- Fluid preferably flows from the inlet towards the outlet.
- the pressure increasing tube may be located upstream of said piston.
- the pressure increasing tube is located between the inlet and the intermediate chamber.
- the pressure increasing tube is arranged to fluidly connect the inlet with the intermediate chamber.
- the pressure increasing tube may be integral to said inlet.
- electromagnetic pump would be made easier since the inlet and pressure increase tube could be made using a single moulding step (e.g. a single injection moulding step).
- the pressure increasing tube and piston may be mechanically independent.
- the piston could be made from ferromagnetic material
- the pressure increasing tube could be made from non-ferromagnetic material, such as plastic or polymer, or any other suitable non-ferromagnetic metal. This will also aid in reducing the cost of the electromagnetic pump.
- the inner diameter of the pressure increasing tube is of a length necessary to pressurize fluid which passes through the pressure increasing tube to a predefined pressure.
- the piston may comprise an inner part and an outer part.
- the piston and the pressure increasing tube are coaxial.
- the inner part of the piston, the outer part of the piston and the pressure increasing tube are coaxial.
- the inner part and outer part are mechanically independent.
- this will make is easier to make the inner and outer parts of the piston from different materials.
- the outer part of the piston could be made from ferromagnetic material, and the inner part of the piston could be made from plastic, or any other non- ferromagnetic metal. This will also aid in reducing the cost of the
- the inner part of the piston may be secured within the outer part of the piston.
- the inner part of the piston is held by friction within the outer part of the piston.
- an outer diameter of the inner part of the piston is substantially equal to an inner diameter of the outer part, so that the inner part of the piston can be held by friction within the outer part of the piston.
- the pressure increasing tube has an inner diameter which is smaller than an inner diameter of the piston.
- the pressure increasing tube has an inner diameter which is smaller than the outer diameter of the piston.
- the pressure increasing tube has an inner diameter which is smaller than an inner diameter of the inner part of the piston.
- the pressure increasing tube has an inner diameter which is smaller than an outer diameter of the inner part of the piston.
- the pressure increasing tube has an inner diameter which is smaller than an inner diameter of the outer part of the piston.
- the pressure increasing tube has an inner diameter which is smaller than an outer diameter of the outer part of the piston.
- the inner part of the piston may abut the outer part of the piston.
- the main spring may be arranged to urge the inner part against the outer part. The main spring will thus ensure that the inner part of the piston is held in abutment with the outer part of the piston.
- the inner part comprises an annular projection and the main spring is arranged to apply a biasing force to the annular projection to urge the inner part of the piston against the outer part of the piston.
- the main spring is arranged to apply a biasing force to the annular projection so that the annular projection urged to abut an end of the outer part of the piston.
- the piston may define the intermediate chamber. Accordingly, as the piston is moved between its first and second positions, the intermediate chamber will also be moved between a first and second position.
- the intermediate chamber is preferably defined by the inner part of the piston.
- the inner part of the piston preferably comprises a tubular member.
- the outer part of the piston preferably comprises a tubular member.
- the inner diameter of the pressure increasing tube is smaller than an inner diameter of the intermediate chamber.
- the inner diameter of the pressure increasing tube may be smaller than an inner diameter of the channel defined in the outer part of the piston.
- the inner diameter of the pressure increasing tube may be smaller than an inner diameter of the outlet.
- At least a portion of the length of said pressure increasing tube may extend into intermediate chamber. At least a portion of the length of said pressure increasing tube may extend into the inner part of the piston. Preferably the pressure increasing tube is telescopically arranged within the inner part of the piston.
- the inner part of the piston may further comprise an annular extension provided on an inner surface of the inner part of the piston.
- the first valve may comprise a first plug and a first spring.
- a first end of the first spring may be attached to the piston.
- the first end of the spring is attached to inner part of the piston.
- the first end of the spring is attached to said annular extension provided on the inner part of the piston.
- the first plug may be fixed to a second, opposite, end of the first spring.
- the first end of the first spring is the end of the first spring which is closest the outlet, and the second end of the first spring is the end of the first spring which is closest the inlet.
- the first spring is preferably arranged to bias the first plug towards plugging the pressure increasing tube.
- the piston is moved towards the outlet. Therefore moving the piston towards its first position reduces the biasing force applied by the first spring to the first plug.
- the biasing force applied by the first spring to the first plug is decreased as the first spring is less compressed when the piston is moved towards its first position.
- the biasing force applied by the first spring to the first plug is less than the force applied to the first plug by fluid inside the pressure increasing tube.
- a vacuum is created in the intermediate chamber.
- the piston is moved towards it second position. Therefore moving the piston towards its first position increases the biasing force applied by the first spring to the first plug.
- the biasing force applied by the first spring to the first plug is increased as the first spring is compressed more when the piston is moved towards its second position.
- the biasing force applied by the first spring to the first plug is greater than the force applied to the first plug by fluid inside the pressure increasing tube.
- the second valve may comprise a second plug and a second spring.
- a first end of the second spring may be attached to the outlet.
- the first end of the second spring may be attached to the outer part of the piston.
- the outer part of the piston may further comprise a collar, and the first end of the second spring may be attached to the collar provided on the outer part of the piston.
- the second plug may be fixed to a second, opposite, end of the second spring.
- the second spring is preferably arranged to bias the second plug towards plugging the inner part of the piston.
- the second spring is preferably arranged to bias the second plug towards plugging the inner part of the piston so as to prevent the fluid from flowing out of the intermediate chamber towards the outlet.
- the first end of the second spring is the end of the second spring which is closest the outlet, and the second end of the second spring is the end of the second spring which is closest the inlet.
- the piston when the piston is moved towards its first position, the piston is moved towards the outlet. Therefore moving the piston towards its first position increases the biasing force applied by the second spring to the second plug.
- the biasing force applied by the second spring to the second plug is increased as the second spring is compressed more when the piston is moved towards it first position.
- the biasing force applied by the second spring to the second plug is greater than the force applied to the second plug by fluid inside the intermediate chamber.
- the piston is moved towards it second position. Therefore moving the piston towards its first position decreases the biasing force applied by the second spring to the second plug.
- the biasing force applied by the second spring to the second plug is decreased as the second spring is less compressed when the piston is moved towards it second position.
- the biasing force applied by the second spring to the second plug is less than the force applied to the second plug by fluid inside the intermediate chamber. Also when the piston is moved towards its second position the pressure inside the intermediate chamber is increased, thus any fluid within the intermediate chamber will become pressurized.
- the second plug when the piston is in its second position the second plug will be unplugged from the inner part of the piston by pressurized fluid in the intermediate chamber, so that the pressurized fluid within the intermediate chamber can flow from the intermediate chamber into the channel defined in the outer part of the piston. Ultimately, the second plug will thus be unplugged from the inner part of the piston to allow fluid to flow from the intermediate chamber into the outlet.
- first and second springs may be contracted because of the pressure changes which occur within the intermediate chamber of the electromagnetic pump.
- the first valve is opened when the volume of the intermediate chamber is decreased (i.e. when the vacuum is created in the intermediate chamber), the vacuum will also aid in
- the second valve is opened when the volume in the intermediate chamber increased (i.e. when the pressure inside the intermediate chamber is increased to pressurize the liquid in the
- the increase in pressure inside the intermediate chamber will also aid in maintaining the first valve closed; this occurs when the piston is moved to its second position.
- the piston is in its first position it is closer to the outlet than the inlet.
- the piston is in its second position it is closer to the inlet than the outlet.
- the piston when the piston is in its first position the telescopically arrangement of the inner part of the piston and the pressure increasing tube is at a maximum extension.
- the piston when the piston is in its second position, the telescopically arrangement of the inner part of the piston and the pressure increasing tube is collapsed.
- the first plug when the piston is in its first position, the first plug is removed from the pressuring increasing tube, to unplug the pressure increasing tube, to allow fluid to flow from the pressure increasing tube into the intermediate chamber.
- the first plug plugs the pressure increasing tube, to prevent fluid from flowing from the intermediate chamber into the pressure increasing tube and/or from the intermediate chamber into the pressure increasing tube.
- the second plug plugs the inner part of the piston, to prevent fluid from flowing out of the channel defined in the outer part of the piston into the intermediate chamber and/or from the intermediate chamber into the channel defined in the outer part of the piston, and into the outlet.
- the second plug is removed from the inner part of the piston, to unplug the inner part of the piston, to allow fluid to flow from the intermediate chamber into the channel defined in the outer part of the piston, and into the outlet.
- the first and/or second plugs may have a spherical shape.
- the first and/or second plugs may have a stepped-cylindrical shape. It will be understood that the first and/or second plugs may have any suitable shape or configuration.
- At least one clearance channel may be provided between the inner part of the piston and the outer part of the piston. Preferably, a plurality of clearance channels is provided between the inner part of the piston and the outer part of the piston.
- One of the outer part or inner part of the piston may be comprise a ferromagnetic material and the other part may comprise non- ferromagnetic material.
- One of the outer part or inner part of the piston may be composed of a ferromagnetic material and the other part may be composed of a non-ferromagnetic material.
- the outer part of the piston may be composed of a ferromagnetic material and the inner part of the piston may be composed of a non-ferromagnetic material.
- the inner part of the piston may be made from plastic or polymer.
- a method of manufacturing an electromagnetic pump comprising the steps of, providing an inlet; providing an outlet; providing an intermediate chamber between said inlet and said outlet; providing a first valve for controlling the flow of fluid into the intermediate chamber, and providing a second valve for controlling the flow of fluid out of the intermediate chamber; providing a piston between the inlet and outlet, wherein the piston comprises a channel through which fluid can flow and at least a part of the piston comprises ferromagnetic material, and wherein the piston is moveable between a first and second position to control the opening and closing of the first and second valves; providing a main spring, and arranging the main spring to exert a force against said piston to bias the piston towards its first position; providing a coil for generating an electromagnetic field for moving said piston towards its second position, against the biasing force exerted by said main spring; providing a pressure increasing tube with an inner diameter which is smaller than an inner diameter of the inlet, so fluid flowing from the inlet into the pressure increasing tube is pressur
- the step of providing a piston comprises providing a piston which comprises an inner part and an outer part, wherein one of the inner or outer parts is composed of a ferromagnetic material and the other part is composed of non-ferromagnetic material.
- the inner part and outer part are mechanically independent.
- the step of providing a piston may comprise providing a piston which comprises an inner part and an outer part, and the method comprising the step of arranging the inner part within the outer part, so that the inner part is held by friction within the outer part of the piston.
- the step of providing a piston may comprise providing a piston which comprises an inner part and an outer part, and the method comprises the step of arranging the main spring is to urge the inner part against the outer part, so that the main spring will hold the inner part in abutment with the outer part of the piston.
- Fig. 1 a shows a longitudinal-section view of an electromagnetic pump according to an embodiment of the present invention
- Fig. 1 b provides a perspective view of a piston used in the electromagnetic pump shown in Fig. 1 a;
- Fig. 1 b provides a cross-section view of a piston used in the electromagnetic pump shown in Fig. 1 a
- Fig. 2 provides a longitudinal-section view of an electromagnetic pump of Fig. 1 a, during use, when the piston is in its first position
- Fig. 3 provides a longitudinal-section view of an electromagnetic pump of Fig. 1 a, during use, when the piston is in its second position;
- Fig. 4a provides a longitudinal-section view of an
- FIG. 4b provides a perspective view of a piston used in the electromagnetic pump shown in Fig. 4a;
- Fig. 5 provides a longitudinal-section view of an electromagnetic pump of Fig. 4a, during use, when the piston is in its first position;
- Fig. 6 provides a longitudinal-section view of an electromagnetic pump of Fig. 4a, during use, when the piston is in its second position;
- Fig. 7a shows a longitudinal-section view of a known
- Fig. 7b shows the electromagnetic pump of Fig. 7a when the piston is in its second position
- Fig. 7c shows the electromagnetic pump of Fig. 7a when the piston is in its first position.
- FIG. 1 a shows a cross-sectional view of an electromagnetic pump 1 according to an embodiment of the present invention.
- the electromagnetic pump 1 comprises an inlet 2, an outlet 3 and a piston 4located between the inlet 2 and outlet 3.
- the electromagnetic pump 1 further comprises a main spring 5.
- One end 6 of the main spring 5 abuts a surface 7 of the inlet 2 and the opposite end 8 of the main spring 5 abuts a surface 9 of the piston 4, so as to exert a force against said piston 4 to bias the piston toward a first position.
- a coil 10 is further provided for generating an electromagnetic field which can move said piston 4, against the biasing force exerted by said main spring 5, towards a second position.
- the main spring 5 is a helical spring.
- the piston 4 comprises an inner part 16 and an outer part 17. At least part of the inner part 16 is arranged within the outer part 17, and both the inner and outer parts 16,17 of the piston 4 are fixed relatively to each other. In this particular example the majority of the inner part 16 is arranged within the outer part 17.
- the inner part 16 of the piston 4 is held by friction within the outer part 17, so that the inner and outer parts 16,17 are fixed relative to each other.
- the maximum (effective) outer diameter "D 0 "' of the inner part 16 of the piston 4 is preferably substantially equal to the inner diameter "d," of the outer part 17 of the piston 4, as is illustrated in Figures 1 b and c. It can also be seen in Figures 1 a, b and c that the inner part 4 of the piston comprises a tubular member and that the outer part of the piston also comprises a tubular member.
- At least one clearance-channel 18 is provided between the inner part 16 and the outer part 17 of the piston 4.
- Figure 1 b and c show three clearance-channels 18.
- At least a part of the piston 4 comprises ferromagnetic material.
- the outer part 17 comprises ferromagnetic material and the inner part 16 of the piston 4 comprises plastic (or any other suitable non- ferromagnetic material).
- the inner part 16 of outer part 17 may comprise ferromagnetic material while the other part 16,17 comprises another material; or both the inner part 16 and outer part 17 could both comprise ferromagnetic material.
- the inner part 16 of the piston 4 defines an intermediate chamber 1 1 . Since the piston 4 is moveable between a first and second position, the intermediate chamber 1 1 which is defined by the inner part 16 of the piston 4 is, in effect, moveable between the first and second position. The piston 4 and therefore the intermediate chamber 1 1 , is located between said inlet 2 and said outlet 3. [0067]
- the outer part 17 of the piston 4 defines a channel 19 through which fluid can flow. Specifically, the outer part 17 of the piston 4 defines a channel 19 through which fluid, which flows out of the intermediate chamber 1 1 , can flow to the outlet 3.
- a pressure increasing tube 1 5 is provided which fluidly connects the inlet 2 with the intermediate chamber 1 1 .
- a portion of the length "L" of the pressure increasing tube 15 is located within the main spring 5; in this example the majority of the length "L” of the pressure increasing tube 1 5 is located within the main spring 1 5.
- the pressure increasing tube 1 5 is also mechanically independent of the piston 4.
- the pressure increasing tube 1 5 has an inner diameter 'd' which is smaller than an inner diameter 'D' of the inlet 2, so that the pressure in the fluid flowing from the inlet 2 into the pressure increasing tube 1 5 is increased.
- the fluid preferably flows from the inlet 2 towards the outlet 3, therefore the pressure increasing tube 1 5 can be considered to be located upstream of said piston 4.
- a first valve 12 is provided to control the flow of fluid from the pressure increasing tube 1 5 into the intermediate chamber 1 1 .
- a second valve 13 is provided to control the flow of fluid from the intermediate chamber 1 1 to the channel 19 defined by the outer part 17 of the piston.
- the first and second valves 12,13 control the flow of fluid from the inlet 2 into the intermediate chamber 1 1 and from the intermediate chamber 1 1 to the outlet 3, respectively.
- the first valve 12 comprises a first plug 21 and a first spring 22.
- a first end 23 of the first spring 22 is attached to an annular extension 25 provided on the inner surface 26 of the inner part 16 of the piston 4; and the first plug 21 is fixed to a second, opposite, end 27 of the first spring 22.
- the first spring 22 extends from the annular extension 25 to proximate the pressure increasing tube 1 5, and biases the first plug 21 plugs towards plugging the pressure increasing tube 1 5.
- the second valve 13 comprises a second plug 31 and a second spring 32. A first end 33 of the second spring abuts the outlet 3 and the second plug 31 is fixed to a second, opposite, end 37 of the second spring 32.
- the second spring extends from the outlet 3 to proximate the inner part 16 and biases the second plug 31 towards plugging the inner part 16 of the piston (thus plugging the intermediate chamber 1 1 ).
- the second plug 32 comprises a spherical member 32 and the first plug 21 comprises a stepped-cylindrical member 21 ; however it will be understood that the first and second plugs 21 , 31 may have any suitable shape or configuration.
- a portion of the length of said pressure increasing tube 1 5 extends into the inner part 16 of the piston 16.
- the pressure increasing tube 1 5 is telescopically arranged within the inner part 16 of the piston.
- a first seal 43 is located between an outer surface 44 of the pressure increasing tube 1 5 and the inner surface 26 of the inner part 16 of the piston 4.
- the first seal 43 is defined by an o-ring; however it will be understood that any suitable seal may be provided.
- the first seal 43 will prevent fluid from flowing out of the intermediate chamber 1 1 between the pressure increasing tube 1 5 and inner part 16 of the piston 4.
- An o-ring45 is provided between the outer part 17 of the piston 4 and the outlet 3.
- the o-ring 45 acts as a shock absorber.
- the pressure increasing tube 1 5 is arranged so that at least a portion of its length "L" is located within said main spring 5. Locating at least a portion of the pressure increasing tube 1 5 within the main spring 5 reduces the total length of the electromagnetic pump 1. Additionally, the pressure increasing tube 1 5 is located in a more central position in the
- the pressure increasing tube 1 5 may be configured to be integral to said inlet 2, thus reducing the number of parts in the electromagnetic pump 1 .
- the pressure increasing tube 1 5 and piston 4 are mechanically independent, it is easier to make both components from different material; for example, if the piston 4 is made from ferromagnetic material, the pressure increasing tube 1 5 can be easily made from another material, such as non- ferromagnetic material like plastic, as it is mechanically independent to the piston 4.
- FIGs 2 and 3 illustrate the electromechanical pump 1 during use.
- fluid flows from the inlet 2 into the pressure increasing tube 1 5.
- diameter "d" of the pressure increasing tube 1 5 is smaller than the diameter "D” of the inlet 2 pressure in fluid which flows from the inlet 2 into the pressure increasing tube 1 5 is increased.
- the biasing force exerted on the piston 4 by the main spring 5 moves the piston 4 to its first position. Therefore Figure 2 shows the piston in its first position.
- first spring 22 of the first valve 12 Since the first spring 22 of the first valve 12 is attached at its first end 23 to the annular extension 25 provided on inner part 16 of the piston 4, moving the piston 4 towards its first position moves the first end of the spring 22 away from the pressure increasing tube 1 5 and thus reduces the biasing applied by the first spring 22 to the first plug 21 . At the point when biasing force applied by the first spring to the first plug 21 , is less than the force applied to the first plug 21 by the fluid in the pressure increasing tube 1 5. Also when the piston 4 is moved towards its first position the volume of the intermediate chamber 1 1 is increased and thus a vacuum is created in the intermediate chamber 1 1.
- the second spring 32 of the second valve 13 will become more compressed between the piston and outlet 3, causing an increase in the biasing force applied by the second spring 32 to the second plug 32.
- the increase of the biasing force of the second spring 32 will ensure that inner part 16 of the piston remains plugged by the second plug 31 even when fluid has passed from the pressure increasing tube 1 5 into the intermediate chamber 1 1 .
- the vacuum which is created in the intermediate chamber 1 1 will suck the second plug 32 towards plugging the inner part 16.
- the second valve 13 will prevent the fluid from passing out of the outlet 3 to the intermediate chamber 1 1 and also out of the intermediate chamber 1 1 into the outlet 3.
- FIG 3 shows the piston 4 in its second position.
- the piston 4 When the piston 4 is moved towards its second position the piston 4, the volume of the intermediate chamber 1 1 is decreased; accordingly the fluid within the intermediate chamber 1 1 is increased and becomes pressurized.
- the pressurized fluid pushes the first plug 21, of the first valve 12 towards the pressure increasing tube 1 5 so that first plug 21 plugs the pressure increasing tube 15.
- the piston 4 when piston 4 is moved towards its second position the piston 4 the first plug 21 is moved to plug the pressure increasing tube 1 5 and the first spring 22 is compressed between the annular extension 25 on the inner part 16 of the piston and the first plug 21 so as to increase the biasing force applied by the first spring 22 to the first plug 21 .
- the first plug 21 will plug the pressure increasing tube 1 5 to prevent the flow of the pressurized fluid from the intermediate chamber 1 1 to the pressure increasing tube 1 5 and from the pressure increasing tube 1 5 into the intermediate chamber 1 1 .
- the biasing force applied by the second spring 32 to the second plug 31 in the second valve 13 is reduced.
- the pressurized fluid within the intermediate chamber 1 1 will push the second plug 31 away from the inner part 16 of the piston 4 thus urging the second plug 31 to unplug the inner part 16 of the piston 4.
- the pressurized fluid in the intermediate chamber 1 1 will force the second plug 32 to become
- the piston can be continuously, alternatively, moved between its first and second positions, to provide a substantially, continuous flow of fluid from the inlet 2 to the outlet 3.
- FIG 4a shows a cross-sectional view of an electromagnetic pump 50 according to a further embodiment of the present invention.
- the electromagnetic pump 50 comprises many of the same features as the electromagnetic pump shown in Figures 1 a-3 and like features are awarded the same reference numbers.
- the electromagnetic pump 50 comprises a different type of piston 4.
- first end 33 of the second spring 32 of the second valve 13 abuts a collar 53 provided on an inner surface 55 of the outer part 17 of the piston.
- the electromagnetic pump 50 comprises a piston 4 which has an inner part 56 and an outer part 57.
- Figure 4b provides a perspective view of the piston 4.
- the inner and outer parts 56, 57 are similar to the inner and outer parts 16,17 of the piston 4 provided in the electromagnetic pump 1 , in that both the inner and outer parts 56, 57 comprises tubular members. Clearance channels 18 are also provided between the inner and outer parts 56, 57.
- the outer part 57 further comprises a collar 53 against which the first end 33 of the second spring 32 of the second valve 13, abuts. It can be seen from Figure 4a that the outer part 57 comprises chamfered edges 58a,b, and an end 69 of the inner part 56 abuts these chamfered edges 58a,b.
- the inner part 56 of the piston 4 is substantially located outside of the outer part 57 of the piston.
- the inner part 56 of the piston 4 further comprises an annular projection 59.
- One end 6 of the main spring 5 abuts the surface 7 of the inlet 2 and the opposite end 8 of the main spring 5 abuts the annular projection 59 on the inner part 56 of the piston 4, so as to urge the inner part 56 of the piston 4 towards abutting a face 61 of the outer part 56.
- the electromagnetic pump 50 is easier to manufacture; since the inner part 56 of the piston 4 is not held by friction within the outer part of the piston 57, the outer diameter of the inner part 56 does not need to be substantially equal to the inner diameter of the outer part 57. Accordingly, this allows for more tolerance in component dimensions during manufacture.
- Figures 5 and 6 illustrate the electromechanical pump 50 during use.
- Figure 5 illustrates the electromagnetic pump 50 when the piston 4 has been moved to its first position.
- Figure 6 illustrates the electromagnetic pump 50 when the piston 4 has been moved to its second position.
- the electromechanical pump 50 operates in the same manner as described above for electromechanical pump 1 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CH8872013 | 2013-04-30 | ||
PCT/EP2014/058268 WO2014177442A1 (en) | 2013-04-30 | 2014-04-23 | Electromechanical pump |
Publications (3)
Publication Number | Publication Date |
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EP2994639A1 true EP2994639A1 (de) | 2016-03-16 |
EP2994639B1 EP2994639B1 (de) | 2020-12-23 |
EP2994639B8 EP2994639B8 (de) | 2021-03-10 |
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ID=48569899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP14719308.0A Active EP2994639B8 (de) | 2013-04-30 | 2014-04-23 | Elektromechanische pumpe |
Country Status (2)
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EP (1) | EP2994639B8 (de) |
WO (1) | WO2014177442A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH711680B1 (fr) * | 2015-10-23 | 2022-01-14 | Gotec Sa | Module de chauffage pour pompe à liquide, ensemble d'alimentation en liquide chaud et machine de production de boisson chaude. |
CH713235A2 (fr) | 2016-12-15 | 2018-06-15 | Gotec Sa | Bobine pour pompe électromagnétique, pompe électromagnétique, procédé de fabrication de bobine et kit de montage de pompe électromagnétique. |
EP3336352A1 (de) | 2016-12-15 | 2018-06-20 | Gotec SA | Spule für elektromagnetische pumpe |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1653426A1 (de) * | 1967-03-01 | 1971-09-02 | Otto Eckerle | Elektromagnetische Schwingankerpumpe |
DE2410768C3 (de) * | 1974-03-07 | 1979-01-18 | Danfoss A/S, Nordborg (Daenemark) | Elektromagnetische Pumpe |
-
2014
- 2014-04-23 WO PCT/EP2014/058268 patent/WO2014177442A1/en active Application Filing
- 2014-04-23 EP EP14719308.0A patent/EP2994639B8/de active Active
Non-Patent Citations (1)
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See references of WO2014177442A1 * |
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Publication number | Publication date |
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WO2014177442A1 (en) | 2014-11-06 |
EP2994639B1 (de) | 2020-12-23 |
EP2994639B8 (de) | 2021-03-10 |
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