CN102536754B - Pump-unit and pumping system - Google Patents
Pump-unit and pumping system Download PDFInfo
- Publication number
- CN102536754B CN102536754B CN201110386882.6A CN201110386882A CN102536754B CN 102536754 B CN102536754 B CN 102536754B CN 201110386882 A CN201110386882 A CN 201110386882A CN 102536754 B CN102536754 B CN 102536754B
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- Prior art keywords
- pump
- pressure
- valve
- unit
- fluid
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/047—Pumps having electric drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/11—Kind or type liquid, i.e. incompressible
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/60—Fluid transfer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
Abstract
The invention provides a kind of can at the pump-unit of limit fluid expulsion that shuts down.Pump-unit (3) possesses housing (10), movable link (30), suction valve (41), expulsion valve (42) and valve system (50).Housing (10) has the pump chamber (100) that can be communicated with respectively with suction port (101) and exhaust port (102).Movable link (30) can move in the inside of housing (10), carries out alternately to pump chamber (100) suction fluid with from pump chamber (100) displacement fluids.Expulsion valve (42) is installed between pump chamber (100) and exhaust port (102), allows the fluid being more than or equal to the first pressure to flow from pump chamber (100) to exhaust port (42).Valve system (50) is installed on housing (10), and restriction is greater than described first pressure and the fluid being less than or equal to the second pressure flows from suction port (101) to exhaust port (102).
Description
Technical field
The present invention relates to a kind of pump-unit used as such as pressurized machine or suction booster and the pumping system with this pump-unit.
Background technique
As the machine making the gas such as gaseous fuel or oxygen, cooling water or hydraulic pressure wet goods liquid etc. rise to required pressure, the pump-unit being called pressurized machine or suction booster is widely known by the people.In this pump-unit, use Roots pump or diaphragm pump etc., such as, in following patent documentation 1, record the diaphragm pump that the pressurized machine as the gaseous fuel in fuel cell system uses.
Prior art document
Patent documentation
Patent documentation 1: JP 2009-47084 publication
Summary of the invention
Existing pressurized machine does not possess and reduces pressure and the function of discharging to the hydrodynamic pressure imported.Therefore, there is provided in the pumping system of the pressure source of the fluid being more than or equal to certain pressure to the suction port of pressurized machine being connected with, the fluid being fed to suction port when pressurized machine shuts down is discharged from pressurized machine, and difference according to circumstances likely makes system produce fault.
In view of the above circumstances, the object of this invention is to provide a kind of pump-unit and the pumping system that can stop limit fluid expulsion in running.
In order to reach above-mentioned purpose, the pump-unit that a mode of the present invention relates to comprises: housing, movable link, the first valve, the second valve and the 3rd valve.
The pump chamber that described housing has suction port, exhaust port and can be communicated with described suction port and described exhaust port respectively.
Described movable link, can move in the inside of described housing, carries out alternately discharging described fluid to described pump chamber draws fluid with from described pump chamber.
Described first valve, is installed between described suction port and described pump chamber, allows described fluid to flow from described suction port to described pump chamber.
Described second valve is installed between described pump chamber and described exhaust port, when the fluid of described pump chamber is more than or equal to the first pressure, allows described fluid to flow from described pump chamber to described exhaust port.
Described 3rd valve is installed on described housing, when the described fluid between described suction port and described exhaust port is greater than described first pressure and is less than or equal to the second pressure, limits described fluid and flows to described exhaust port from described suction port.
In addition, in order to reach above-mentioned purpose, the pumping system that a mode of the present invention relates to comprises: pump-unit, pressure source and processing division.
Described pump-unit has housing, movable link, the first valve, the second valve and the 3rd valve.
Described housing has the suction port got in touch with described pressure source, the exhaust port got in touch with described processing division and the pump chamber that can be communicated with described suction port and described exhaust port respectively.
Described movable link can move in the inside of described housing, carries out alternately to described pump chamber draws fluid with from described pump chamber expels fluid.
Described first valve is installed between described suction port and described pump chamber, allows described fluid to flow from described suction port to described pump chamber.
Described second valve is installed between described pump chamber and described exhaust port, allows the described fluid being more than or equal to the first pressure to flow from described pump chamber to described exhaust port.
Described 3rd valve is installed on described housing, and restriction is greater than described first pressure and the described fluid being less than or equal to the second pressure flows from described suction port to described exhaust port.
Described pressure source is connected to described suction port, provides the fluid being less than or equal to described second pressure to described pump-unit.
Described processing division is connected to described exhaust port, processes the fluid of discharging from described pump-unit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the pumping system that one embodiment of the present invention relates to;
Fig. 2 is the sectional drawing of the pump-unit that one embodiment of the present invention relates to;
Fig. 3 is the sectional oblique drawing of the structure representing the valve system be assembled in described pump-unit;
Fig. 4 is the sectional drawing of described valve system;
Fig. 5 is the experimental result of time variations of the discharge flow rate of pump-unit when representing the running of repeatedly carrying out pump-unit and stop;
The pipeline configuration figure of Fig. 6 for using in the experiment shown in Fig. 5;
Fig. 7 is the figure of the effect that described pump-unit is described;
Fig. 8 is the sectional drawing of the pump-unit that the second mode of execution of the present invention relates to;
Fig. 9 is the decomposed oblique drawing of the pump-unit that the 3rd mode of execution of the present invention relates to;
The figure of the effect that Figure 10 is the pump-unit shown in explanatory drawing 9;
Figure 11 is the oblique drawing of the pump-unit that the 4th mode of execution of the present invention relates to;
The pith sectional drawing that Figure 12 is the pump-unit shown in Figure 11;
Figure 13 is the plan view of the pump-unit shown in Figure 11;
Figure 14 is the rear view of the pump-unit shown in Figure 11;
Figure 15 is the planimetric map of the pump-unit shown in Figure 11;
Figure 16 is the worm's eye view of the pump-unit shown in Figure 11;
Figure 17 is the right elevation of the pump-unit shown in Figure 11;
Figure 18 is the left view of the pump-unit shown in Figure 11.
Description of reference numerals
1 pumping system
2 pressure sources
3,6,7,8 pump-units
4 processing divisions
10,70,80 housings
20 Ma Qu move portion
30 movable links
31 barrier films
41 suction valves
42 expulsion valves
50,60 valve systems
51,61 valve members
74 space portions
100 pump chambers
101 suction ports
102 exhaust ports
Embodiment
The pump-unit that one embodiment of the present invention relates to comprises: housing, movable link, the first valve, the second valve and the 3rd valve.
The pump chamber that described housing has suction port, exhaust port and can be communicated with described suction port and described exhaust port respectively.
Described movable link, can move in the inside of described housing, carries out alternately discharging described fluid to described pump chamber draws fluid with from described pump chamber.
Described first valve is installed between described suction port and described pump chamber, allows described fluid to flow from described suction port to described pump chamber.
Described second valve is installed between described pump chamber and described exhaust port, when the fluid of described pump chamber is more than or equal to the first pressure, allows described fluid to flow from described pump chamber to described exhaust port.
Described 3rd valve is installed on described housing, when the described fluid between described suction port and described exhaust port is greater than described first pressure and is less than or equal to the second pressure, limits described fluid and flows to described exhaust port from described suction port.
In described pump-unit, movable link periodically changes by making the volume of pump chamber, carries out to pump chamber draws fluid with from pump chamber expels fluid alternately.Fluid both can be gas also can be liquid.When sucking fluid, import fluid via the first valve to pump chamber from suction port.During displacement fluids, the fluid being directed into pump chamber is compressed into by movable link and is more than or equal to the first pressure in pump chamber, thus opens the second valve and discharge from exhaust port.By repeatedly performing above operation, from exhaust port to be more than or equal to the pressure displacement fluids of the first pressure.
The pressure of the second valve in pump chamber reaches the moment being more than or equal to described first pressure and opens, and allows fluid to flow from pump chamber to exhaust port.Therefore, such as, when pump-unit shuts down, if be directed in pump chamber with the pressure being more than or equal to the first pressure by fluid by suction port, then the second valve is opened, and fluid flows to exhaust port.
Therefore, described pump-unit has the 3rd valve.3rd valve restriction is greater than the first pressure and is less than or equal to the flowing of the fluid of the second pressure.Therefore, when pump-unit shuts down, even if having the fluid being more than or equal to the first pressure and being less than or equal to the pressure of the second pressure when being directed in pump chamber from suction port, also hinder the flowing of fluid by the 3rd valve, suppression fluid is discharged from exhaust port.Therefore, when suppressing to shut down, fluid is discharged accidentally.
In addition, when utilizing described pump-unit that pump-unit can be suppressed to shut down, fluid is discharged accidentally, and therefore, described pump-unit also goes for suction port and is connected with in the pumping system of fluid pressure source.Therefore, spill fluid from exhaust port and cause the situation of system jam when can eliminate because shutting down.
Described second pressure can suitably set, such as, with permissible flow of the fluid of discharging under being directed into the pressure of the fluid of suction port or the state that shuts down etc. for benchmark sets.The meaning of " cutting off flowing " and the meaning of " though do not cut off flowing but reduce its flow " is contained in " restriction flowing ".
3rd valve is installed on housing.3rd valve both can be installed on suction port side, also can be installed on exhaust port side.In one embodiment, the 3rd valve is configured at than the position of the second valve closer to exhaust port side.Therefore, the flowing of the fluid imported to pump chamber can not be hindered, thus guarantee stable pump performance.
3rd valve can, for cutting off the structure of the flowing of the fluid being less than or equal to described second pressure completely, also can be both the structure that its aperture periodically changes between described first pressure and described second pressure.The former when, the 3rd valve can be made up of such as solenoid valve etc.
On the other hand, when the latter, the 3rd valve adopts and becomes large valve arrangement according to pressure aperture.Such as, the 3rd valve there is valve seat and can be positioned on valve seat and aperture according to being more than or equal to described first pressure and the valve member changed with being less than or equal to the pressure continuity of the second pressure.As the valve with this valve arrangement, can Application Example as umbrella valve.Therefore, the low discharge that can realize the fluid of discharging from described pump-unit controls.
Described housing also can have the space portion expanded by a part for the stream between described second valve of contact and described 3rd valve further.Described space portion works the buffer space of the pulsation cushioning the fluid of discharging.Therefore, the pulsation of fluid can be reduced, with stable flow displacement fluids.In addition, when the driving according to discharge flow rate control pump device, the stable drived control of pump-unit can be realized.
Described pump-unit can be made up of diaphragm pump.Now, described movable link comprises the deformable membrane dividing described pump chamber.Therefore, small-sized pump-unit can be provided.
The pumping system that one embodiment of the present invention relates to comprises: pump-unit, pressure source and processing division.
Described pump-unit has housing, movable link, the first valve, the second valve and the 3rd valve.
The pump chamber that described housing has the suction port got in touch with described pressure source, the exhaust port got in touch with described processing division and can be communicated with described suction port and described exhaust port respectively.
Described movable link can move in the inside of described housing, carries out alternately to described pump chamber draws fluid with from described pump chamber expels fluid.
Described first valve is installed between described suction port and described pump chamber, allows described fluid to flow from described suction port to described pump chamber.
Described second valve is installed between described pump chamber and described exhaust port, allows the described fluid being more than or equal to the first pressure to flow from described pump chamber to described exhaust port.
Described 3rd valve is installed on described housing, and restriction is greater than described first pressure and the described fluid being less than or equal to the second pressure flows from described suction port to described exhaust port.
Described pressure source is connected to described suction port, provides the fluid being less than or equal to described second pressure to described pump-unit.
Described processing division is connected to described exhaust port, processes the fluid of discharging from described pump-unit.
Utilize described pumping system, even if when pump-unit shuts down, have the fluid being more than or equal to the first pressure and being less than or equal to the pressure of the second pressure when being directed in pump chamber from pressure source, also hinder the flowing of fluid by the 3rd valve, suppression fluid is discharged from exhaust port.When therefore suppressing to shut down, fluid is discharged accidentally.In addition, spill fluid from exhaust port and cause the situation of system jam when can eliminate because shutting down.
Described processing division is not particularly limited, and comprises the various machines for utilizing the fluid of discharging from pump-unit to come produce power or power, such as: converter, burner, generator, cylinder assembly, various engine.
Referring to accompanying drawing, embodiments of the present invention are described
First mode of execution
Pumping system
Fig. 1 is the schematic diagram representing the pump-unit that one embodiment of the present invention relates to.Pump-unit 1 of the present embodiment has pressure source 2, pump-unit 3, processing division 4 and control device 5.
Pressure source 2 is connected to the suction side (first side) of pump-unit 3, and processing division 4 is connected to the discharge side (second side) of pump-unit 3.Pressure source 2 can be both the container such as tank, high-pressure gas cylinder of the fluid (gas or liquid) of storage specified pressure, also can produce source for compressor equal pressure.Pump-unit 3 provides it to the pressurized machine of processing division 4 or suction booster plays a role as by the fluid lifts of the pressure P imported from pressure source 21 to the pressure P 2 of specifying.Processing division 4 processes the fluid that pump-unit 3 provides, produce power or power etc.The running of control device 5 control pump device 3, but also can control the whole system comprising processing division 4.
Pumping system 1 is applied in such as fuel cell system.Now, pressure source 2 is equivalent to fuel pot, and pump-unit 3 pairs of gaseous fuels (such as town gas (biogas), liquefied petroleum gas (LPG) (LPG)) carry out supercharging and are supplied to processing division 4.Include in processing division 4 gaseous fuel is converted to hydrogen converter, the fuel cell of hydrogen storage, Power Generation Section etc. that hydrogen and oxygen are reacted.
Pump-unit
Next, with reference to Fig. 2 being described in detail to pump-unit 3.Fig. 2 is the sectional drawing of the structure representing pump-unit 3.In present embodiment, pump-unit 3 is made up of diaphragm pump.
Pump-unit 3 has metal shell 10 and drive portion 20.Housing 10 has pump body 11, pump head 12 and pump head lid 13.Drive portion 20 has motor 21 and motor casing 22.
Pump body 11 forms the operating space 105 holding movable link 30 in the inside of housing 10.Movable link 30 has barrier film 31, is fixed on the fixture 32 on barrier film 31 and fixture 32 is connected to the connecting rod 33 of motor 21.
Barrier film 31 is formed by discoid rubber material, and its edge part is held between pump body 11 and pump head 12.Fixture 32 is fixed on the central part of barrier film 31, forms by being assembled into the multiple parts clamping barrier film 31 up and down.Connecting rod 33 is integrated with fixture 32 one-tenth in the mode of the central part running through barrier film 31.Connecting rod 33, via bearing 34, is connected to the surface of the eccentric cam 35 be arranged on the running shaft 210 of motor 21.
Pump head 12 has suction port 101 and exhaust port 102, above the base 110 being configured at ring-type.Base 110 is installed on the open end on the top of pump body 11, together clamps the edge part of barrier film 31 with pump head 12.Pump chamber 100 is formed between pump head 12 and barrier film 31.
Pump head 12 has the suction passage T1 of contact suction port 101 and the pump chamber 100 and drain passageway T2 of contact pump chamber 100 and exhaust port 102 respectively.Pump chamber 100, via suction passage T1 and drain passageway T2, can be communicated with suction port 101 and exhaust port 102 respectively.Suction passage T1 and drain passageway T2 are separately installed with suction valve 41 (the first valve) and expulsion valve 42 (the second valve).
Suction valve 41 is installed on pump head 12, so that the inaccessible inlet hole h1 forming suction passage T1.Suction valve 41 is made up of the leaf valve of the end being installed on the inlet hole h1 closing on pump chamber 100, allows fluid to flow from suction port 101 to pump chamber 100.The cracking pressure (opening the minimum pressure needed for suction valve 41) of suction valve 41 is not particularly limited, as long as import the cracking pressure of the gas degree of target flow when having pump-unit work to pump chamber 100.Therefore, the cracking pressure of suction valve 41 also can for the pressure lower than the pressure of the gas provided to pump-unit 3 from pressure source 2.
On the other hand, expulsion valve 42 is installed on pump head 12, so that the inaccessible tap hole h2 forming drain passageway T2.Expulsion valve 42 is made up of the leaf valve of end of tap hole h2 of the opposite side being installed on pump chamber 100, allows fluid to flow from pump chamber 100 to exhaust port 102.The cracking pressure (opening the minimum pressure needed for expulsion valve 42) of expulsion valve 42 is not particularly limited, be set as the pressure that can obtain required head pressure, in present embodiment, be set as the pressure (first pressure) larger than the cracking pressure of suction valve 41.
Pump head lid 13 is installed on the top of pump head 12.Suction passage T1 and drain passageway T2 is combined by pump head 12 and pump head lid 13 and is formed respectively.Pump body 11, pump head 12 and pump head lid 13 use multiple screw member B and are fixed as one.
Motor 21 is made up of the DC brushless motor of rotation-controlled number, is accommodated in the inside of cylindric motor casing 22.Motor 21 has running shaft 210, stator 211 and rotor 212.Stator 211 is fixed on the inner face of motor casing 22, and rotor 212 is fixed on running shaft 210 around.Running shaft 210 is via bearing 23,24, and be supported on motor casing 22, its front end is installed on the rotating center of eccentric cam 35.
With its rotating center, relative to the inner ring of bearing 34, the mode of bias is formed eccentric cam 35.Therefore, when the driving according to motor 21, running shaft 210 is when its axle rotates, and eccentric cam 35 and running shaft 210 together rotate, thus movable link 30 is reciprocated in the vertical direction in the inside of operating space 105.Therefore, the volume of pump chamber 100 periodically changes, and can obtain the pumping function of specifying.The amount of reciprocating (stroke amount) of movable link 30 is determined by the offset of eccentric cam 35.
Pump-unit 3 has valve system 50 (the 3rd valve) further.In present embodiment, valve system 50 is installed on exhaust port 102.Valve system 50 has and to shut down the function that limit gas flows out from gas discharge outlet 102 at pump-unit 3.
Fig. 3 is the sectional oblique drawing of the structure representing valve system 50, and Fig. 4 represents the sectional drawing of valve system 50.Valve system 50 has the metal housing 52 of rubber valve member 51 and storage valve member 51.
Outer cover 52 has the first end 521 of the exhaust port 102 being connected to housing 10 and is connected to the second end 522 of the pipeline (omitting in diagram) got in touch with processing division 4.The surrounding of first end 521 is equiped with seal ring 54, and first end 521 is seal-installed on the inside of exhaust port 102 by sealing ring 54.
The inside of outer cover 52 is formed with the internal path 523 between contact first end 521 and the second end 522.In the substantially central portion of internal path 523, the wall portion 53 that the surrounding of central part and central part has multiple hole 531 is vertically formed on the wall of internal path 523, via this some holes 531, can be communicated with between first end 521 and the second end 522.
Valve member 51 is made up of umbrella valve.That is, valve member 51 is formed as roughly discoid, is configured in internal path 523 by being installed in the center hole of wall portion 53 in the axle portion 511 being formed at its central part.The edge part 512 of valve member 51 be formed at towards valve seat 532 Elastic Contact on the surface of the wall portion 53 of the second end 522, stop fluid to move from the second end 522 side direction first end 521 effluent.That is, valve member 51 plays check valve.
On the other hand, valve member 51 for fluid from the flowing of first end 521 side direction the second end 522 side clockwise direction, by be more than or equal to certain pressure valve opening thus to allow the flowing of this fluid.Now, valve member 51 leaves pump seat 532 to the second end 522 side resiliently deformable as shown in Figure 4, by edge part 512, removes the partition state of the internal path 532 formed by valve member 51.In the fluid lower than described specified pressure pressure, edge part 512 is taken a seat to valve seat 532, maintains the partition state of internal path 523.
Valve member 51 uses the rubber material various process gas to tolerance.Such as when process gas use biogas or propane gas, use and there is nitrile butadiene rubber (NBR), hydrogenated nitrile-butadiene rubber (HNBR), fluorine rubber (FKM) etc. have the rubber material of tolerance valve member 51 to the hydrocarbon gas such as biogas or propane gas.Thickness, the size of valve member 51 are not particularly limited, and are set as thickness, the size that can guarantee the cracking pressure that may correspond to all size respectively.
That is, the cracking pressure (opening the minimum pressure needed for valve member 51) of valve member 51, is at least set as the pressure higher than the cracking pressure (the first pressure) of expulsion valve 42.Further, valve member 51 limits the cracking pressure and the flowing being less than or equal to the gas of specified pressure (the second pressure) that are greater than expulsion valve 42.
The gas pressure P1 that the pressure source 2 of the cracking pressure reference pumping system 1 of valve member 51 provides decides.In present embodiment, the cracking pressure of valve member 51 is set as the pressure that the gas pressure P1 in specific pressure source 2 is high.Therefore, even if when the gas pressure P1 of pressure source 2 is greater than the cracking pressure of expulsion valve 42, also can shuts down at pump-unit 3 and to flow out to processing division 4 from exhaust port 102 after body of dying, thus can prevent gas from flowing out to processing division 4 effectively.
It should be noted that, as described below, the cracking pressure of described valve member also can be set smaller than the pressure of the gas pressure P2 of pressure source 2.
The operation of pump-unit
Next, the typical example of operation of the pump-unit 3 of above-mentioned formation is described.
Pump-unit 3 is driven by the motor 21 starting drive portion 20.The rotation number of motor 21 is controlled by control device 5, such as, reach the discharge flow rate of specifying according to the flowmeter of the discharge side being arranged at pump-unit 3.Motor 21 makes eccentric cam 35 rotate via running shaft 210, thus movable link 30 is reciprocated with the stroke of specifying in operating space 105.Therefore, the barrier film 31 dividing pump chamber 100 will move up and down, and the volume of pump chamber 100 periodically changes.
Movable link 30 periodically changes by making the volume of pump chamber 100, carries out alternately to pump chamber 100 suction gas with from pump chamber 100 Exhaust Gas.Namely, importing pressure via suction valve 41 to pump chamber 100 from the pressure source 2 being connected to suction port 101 is that the gaseous fuel that the gaseous fuel of P1 (such as 2kPa (manometer pressure)) imports to pump chamber 100 is compressed and supercharging by movable link pump chamber 100, and expulsion valve 42 and valve system 50 are opened.By repeatedly carrying out above operation, be the gaseous fuel of P2 (such as 15kPa (manometer pressure)) from exhaust port 102 to processing division 4 head pressure.
Wherein, the moment that the pressure of expulsion valve 42 in pump chamber 100 reaches the cracking pressure being more than or equal to expulsion valve 42 opens, and allows gas to flow from pump chamber 100 to exhaust port 102.Therefore, when pump-unit 3 shuts down, if import gas with the pressure being more than or equal to the cracking pressure of expulsion valve 42 to pump chamber 100 from suction port 101, then expulsion valve 42 is opened, and fluid flows to exhaust port 102.
Therefore, at present embodiment pump-unit 3, exhaust port 102 place is provided with valve system 50.Valve system 50 has the high cracking pressure of the gas pressure (P1) in specific pressure source 2.Therefore, when pump-unit 3 shuts down, even if when the gas of pressure P 1 imports from suction port to pump chamber 100, also can be stoped the flowing of gas by valve system 50, prevent gas from flowing out to processing division 4 from exhaust port 102.Like this, owing to inhibit gas when shutting down accidentally to discharge, therefore, the situation of system jam can be eliminated.
In addition, in present embodiment, valve system 50 has can make aperture continually varying structure according to importing pressure.Therefore, pump-unit 6 again entry into service time can open valve system 50 according to head pressure, and the gas that processing division 4 provides required flow can be rapidly to.
The time variations of the discharge flow rate of the pump-unit 3 when Fig. 5 shows the running of repeatedly carrying out pump-unit 3 under the experimental condition shown in Fig. 6 and stops.In Fig. 6, a is knock out drum, and b is pressure meter, and c is for sucking pipe arrangement, and d is pressurized machine, is equivalent to present embodiment pump-unit 3.E is pressure meter, and f is for discharging pipe arrangement, and g is fixing orifice plate, and h is flowmeter.
As shown in Figure 5, confirm that the minimum value of discharge flow rate is 0, when pump-unit 3 shuts down, the gas seal function of valve system 50 runs well.Further, also confirm that the discharge flow rate of pump-unit 6 stably maintains certain value, reproducibility is high.
Fig. 7 is for representing the experimental result of discharge flow rate relative to the change of the rotation number control voltage (Vsp) inputted in the motor 21 of pump-unit 6 of pump-unit 6.The piping system being assembled with pump-unit 6 is identical with the pipe arrangement example shown in Fig. 6.
As shown in Figure 7, after confirming pump-unit entry into service, start Exhaust Gas in the moment reaching appointment rotation number, the driving rotation number of its flow and pump-unit rises roughly pro rata.Like this, present embodiment is utilized can to realize sealing function and the control of stable discharge flow rate of gas.
Second mode of execution
Fig. 8 shows the pump-unit that the second mode of execution of the present invention relates to.Below, mainly the structure different from the first mode of execution is described, for the structure identical with described mode of execution, encloses identical reference character, and omit or simplify its explanation.
In present embodiment pump-unit 6, the structure being installed on the valve system 60 of exhaust port 102 is different from described first mode of execution.Valve system 60 has the valve member 61 forming umbrella valve, is arranged in the internal path of outer cover 62 in the mode identical with the first mode of execution shown in Fig. 3 and Fig. 4.
The valve system 60 of present embodiment have restriction be more than or equal to the cracking pressure (the first pressure) of expulsion valve 42 and the gas being less than or equal to the gas pressure P1 (the second pressure) of pressure source 2 function of discharging this is identical with the first mode of execution on the one hand.But the valve system 60 of present embodiment has the permission gas when pump-unit 6 shuts down and flows out to processing division 4 from exhaust port 102, but discharge suppressed this one side of function being less than or equal to specified amount different from the first mode of execution.
That is, the cracking pressure of the valve member 61 of present embodiment is set as the pressure that the gas pressure P1 in specific pressure source 2 is low.The valve system 60 of present embodiment is owing to being aperture continually varying can be made to construct according to gas pressure, and therefore, the gas pressure that can import according to valve system 60 controls the flow to processing division 4 side effluent air.
Now, the pressure setting opened completely needed for valve member 61 is the pressure (such as, being less than or equal to the head pressure (P2) when pump-unit 3 operates usually) that the gas pressure P1 in specific pressure source 2 is large.Therefore, can control to be more than or equal to the cracking pressure (the first pressure) of expulsion valve 42 by valve system 60 and be less than or equal to the flow of the gas of the gas pressure P1 (the second pressure) of pressure source 2.
Adopt present embodiment, when pump-unit 6 shuts down, the gas flow that pressure source 2 provides can be compressed to target flow and be supplied to processing division 4.Therefore, without the need to the modulating valve such as upstream side or the another apertured plate of downstream side at pump-unit 6, the number of components of reduction system can be realized.Present embodiment is applicable to the system also needing to provide to processing division 4 gas being less than or equal to target flow when pump-unit 6 shuts down.
3rd mode of execution
Fig. 9 shows the pump-unit that the 3rd mode of execution of the present invention relates to.Below, mainly the structure different from the first mode of execution is described, for the structure identical with described mode of execution, encloses identical reference character, and omit or simplify its explanation.
Present embodiment pump-unit 7 has housing 70, and described housing 70 comprises pump body 11, pump head 71 and pump head lid 73.Pump head 72 place is formed with suction port 101 and exhaust port 102 respectively.Exhaust port 102 place is provided with the valve system 50 illustrated in the first mode of execution.
In addition, pump head 72 is formed with respectively suction passage T1, drain passageway T2 and knock out drum 721.Externally exposing above pump head 72 at least partially of these paths, and cover via sealing component pump head lid 73, therefore come and large gas barrier.
Usually, the pump of diaphragm type constructively Exhaust Gas generation pulsation.When the driving rotation number of the flow measurement value control pump according to Exhaust Gas, if pulsation is comparatively large, then cannot measure flow accurately, cause the drived control of pump unstable.In addition, when Exhaust Gas is gaseous fuel, combustion instability may be caused because of pulsation, or cause burning insufficient.
Therefore, present embodiment pump-unit 7 has knock out drum 721 between drain passageway T2 and exhaust port 102.Knock out drum 721 forms space portion 74 between expulsion valve 42 (drain passageway T2) and valve system 50, and described space portion 74 expands a part for the runner of the described expulsion valve 42 of contact and valve system 50.Knock out drum 721 has the function of the pulsation of the gas that buffering is discharged from expulsion valve 42.
Utilize present embodiment pump-unit 7, the pulsation of the gas of discharging from valve system 50 can be reduced, with stable flow Exhaust Gas.In addition, when the driving according to discharge flow rate control pump device 7, the driving of stably control pump device 7 can be realized.Furthermore, pump and knock out drum form as one, therefore, without the need to separately establishing knock out drum on the gas flow of pumping system, and the simplicity of feasible system structure.
The volume of the space portion 74 of knock out drum 721 decides according to the pulsation (pressure range) of the gas of discharging from expulsion valve 42.Figure 10 is the experimental result that the present inventors implement, and shows surge volume (cc) and relation between the pressure range of gas of discharging from exhaust port 102.As shown in Figure 10, the volume of space portion 74 more can reduce pressure range more greatly.Such as, by being more than 120cc by the volume settings of space portion 74, pulsation scope can be suppressed at below 0.75kPa.
4th mode of execution
Figure 10 shows the pump-unit that the 4th mode of execution of the present invention relates to.Below, mainly the structure different from the first mode of execution is described, for the structure identical with described mode of execution, encloses identical reference character, and omit or simplify its explanation.
Present embodiment pump-unit 8 has housing 80, drive portion 20 and knock out drum 81.Housing 80 has suction port 101 and exhaust port 102, carries out supercharging to the gas sucked from suction port 101 in not shown pump chamber, discharges gas through supercharging via knock out drum 81 from exhaust port 102.
Figure 11 is the sectional drawing of knock out drum 81 and exhaust port 102.Be formed with the space portion 74 of settable volume in the inside of knock out drum 81, reduce the pulsation of Exhaust Gas.Exhaust port 102 is communicated with space portion 74, and the inside of exhaust port 102 is provided with valve member 51.Valve member 51 has the structure identical with the first mode of execution, has the function that restriction is less than or equal to the outflow of the gas of specified pressure.
In the present embodiment of above-mentioned formation, also can obtain the action effect identical with the respective embodiments described above.Utilize present embodiment pump-unit 8, owing to being supported on housing 80 as the valve member 51 of valve system, therefore can realize reducing number of components.
It should be noted that, Figure 13 ~ Figure 18 shows the outward appearance of pump-unit 8, and Figure 13 is plan view, and Figure 14 is rear view, and Figure 15 is planimetric map, and Figure 16 is worm's eye view, and Figure 17 is right elevation, and Figure 18 is left view.
In sum, be illustrated for embodiments of the present invention, but the present invention is not merely defined in above-mentioned mode of execution, certainly, various change can be applied without departing from the spirit and scope of the invention.
Such as, in above mode of execution, the valve system that restriction is less than or equal to the fluid flowing of specified pressure is installed on exhaust port, but is not limited thereto, such as, also the drain passageway between expulsion valve and exhaust port can arrange described valve system.
In addition, the valve member forming described valve system is not limited to umbrella valve, such as, also can be made up of spherical valve or fly valve etc.
Furthermore, in above mode of execution, pump-unit is made up of diaphragm pump, but is not limited thereto, and the present invention is also applicable to other pump-units such as Roots pump.When Roots pump, as the movable link of volume-variation making pump chamber, corresponding with the rotor of relative configuration.
Claims (1)
1. a pumping system, is characterized in that, comprising:
Pump-unit, described pump-unit comprises: housing, the pump chamber having the suction port got in touch with pressure source, the exhaust port got in touch with processing division and be communicated with described suction port and described exhaust port respectively; Movable link, can move in the inside of described housing, carries out to described pump chamber draws fluid with from described pump chamber expels fluid alternately; First valve, is installed between described suction port and described pump chamber, allows described fluid to flow from described suction port to described pump chamber; Second valve, is installed between described pump chamber and described exhaust port, allows the described fluid being more than or equal to the first pressure to flow from described pump chamber to described exhaust port; 3rd valve, is installed on described housing, by flow from described suction port to described exhaust port be greater than described first pressure and the described fluid compression being less than or equal to the second pressure to target flow, there is the cracking pressure higher than the second valve;
Pressure source, is connected to described suction port, provides the fluid of gas pressure to described pump-unit, and described gas pressure is greater than described first pressure and is less than or equal to described second pressure;
Processing division, is connected to described exhaust port, processes the fluid of discharging from described pump-unit,
When described pump-unit running, by boosting to the pressure being greater than described second pressure in described pump chamber, described 3rd valve is opened completely, and the described fluid of the described gas pressure provided to described pump-unit by described pressure source is supplied to described processing division,
When described pump-unit shuts down, by described 3rd valve, the described fluid compression of the described gas pressure provided to described pump-unit by described pressure source is supplied to described processing division to target flow.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-267547 | 2010-11-30 | ||
| JP2010267547A JP5770458B2 (en) | 2010-11-30 | 2010-11-30 | Pump system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102536754A CN102536754A (en) | 2012-07-04 |
| CN102536754B true CN102536754B (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110386882.6A Active CN102536754B (en) | 2010-11-30 | 2011-11-29 | Pump-unit and pumping system |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5770458B2 (en) |
| KR (1) | KR101299550B1 (en) |
| CN (1) | CN102536754B (en) |
| TW (1) | TWI503482B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615379A (en) * | 2013-12-13 | 2014-03-05 | 苏州盟通利机电设备有限公司 | Anti-explosion vacuum pump |
| GB2527657A (en) * | 2014-05-20 | 2015-12-30 | Ying Lin Cai | Roundel structure for four-compression-chamber diaphragm pump with multiple effects |
| JP5735690B1 (en) * | 2014-08-15 | 2015-06-17 | 応研精工株式会社 | Quick drain valve integrated diaphragm pump |
| KR20160033507A (en) | 2014-09-18 | 2016-03-28 | 엘지전자 주식회사 | Mobile terminal and control method thereof |
| JP2018503764A (en) * | 2014-11-27 | 2018-02-08 | プロフタガレン アクチエボラグＰｒｏｖｔａｇａｒｅｎ Ａｂ | Low flow pump control |
| CN110578683B (en) * | 2018-06-08 | 2021-09-21 | 科际精密股份有限公司 | Diaphragm pump and valve plate thereof |
| CN109236620B (en) * | 2018-11-01 | 2024-02-13 | 长沙多浦乐泵业科技有限公司 | Diaphragm pump |
| CN113958489B (en) * | 2020-07-21 | 2024-02-27 | 海信冰箱有限公司 | Vacuum pump |
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|---|---|---|---|---|
| CN2723733Y (en) * | 2004-08-16 | 2005-09-07 | 张坤林 | Two purpose pump for air extracting and pressurizing |
| CN101372958A (en) * | 2007-08-21 | 2009-02-25 | Ulvac机工株式会社 | Diaphragm pump |
| CN201448207U (en) * | 2009-06-11 | 2010-05-05 | 淮安市科达工业泵厂 | Three-plunger hydraulic diaphragm-type high-pressure pump |
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|---|---|---|---|---|
| SE446353B (en) * | 1981-05-13 | 1986-09-01 | Korhonen Wesala Veikko Olavi | Diaphragm Pump |
| JPH10288160A (en) * | 1997-04-16 | 1998-10-27 | Anest Iwata Corp | Flow rate control system of double acting diaphragm pump |
| JP2000274374A (en) * | 1999-03-24 | 2000-10-03 | Kasei Optonix Co Ltd | Small sized pump |
| JP2006063874A (en) * | 2004-08-26 | 2006-03-09 | Ulvac Kiko Inc | Diaphragm type vacuum pump |
| JP2007141747A (en) * | 2005-11-22 | 2007-06-07 | Matsushita Electric Ind Co Ltd | Gas booster of fuel cell |
| DE102007016134A1 (en) * | 2006-04-25 | 2007-11-08 | Robert Bosch Gmbh | High pressure fuel pump, has throttle arrangement provided at high pressure side of valve seat of pressure limiting valve, where cross section of arrangement is approximately equal to desired maximum opening cross section of valve |
-
2010
- 2010-11-30 JP JP2010267547A patent/JP5770458B2/en active Active
-
2011
- 2011-11-28 TW TW100143505A patent/TWI503482B/en active
- 2011-11-29 KR KR1020110125602A patent/KR101299550B1/en active IP Right Grant
- 2011-11-29 CN CN201110386882.6A patent/CN102536754B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2723733Y (en) * | 2004-08-16 | 2005-09-07 | 张坤林 | Two purpose pump for air extracting and pressurizing |
| CN101372958A (en) * | 2007-08-21 | 2009-02-25 | Ulvac机工株式会社 | Diaphragm pump |
| CN201448207U (en) * | 2009-06-11 | 2010-05-05 | 淮安市科达工业泵厂 | Three-plunger hydraulic diaphragm-type high-pressure pump |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101299550B1 (en) | 2013-08-23 |
| KR20120059406A (en) | 2012-06-08 |
| JP5770458B2 (en) | 2015-08-26 |
| JP2012117440A (en) | 2012-06-21 |
| TWI503482B (en) | 2015-10-11 |
| TW201231814A (en) | 2012-08-01 |
| CN102536754A (en) | 2012-07-04 |
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