CN101245777B - Hydraulic pressure driven membrane pump with leakage compensation equipment - Google Patents
Hydraulic pressure driven membrane pump with leakage compensation equipment Download PDFInfo
- Publication number
- CN101245777B CN101245777B CN2007100852213A CN200710085221A CN101245777B CN 101245777 B CN101245777 B CN 101245777B CN 2007100852213 A CN2007100852213 A CN 2007100852213A CN 200710085221 A CN200710085221 A CN 200710085221A CN 101245777 B CN101245777 B CN 101245777B
- Authority
- CN
- China
- Prior art keywords
- valve
- barrier film
- pump
- diaphragm
- diaphragm pump
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The invention provides a diaphragm pump (3) which comprises a hydraulic control chamber (7) which is arranged between a piston (8) which carries out a reciprocating movement and a diaphragm (3) in pump bodies (1, 2). The diaphragm pump comprises a device used for compensating the leakage of the hydraulic chamber (7); the device comprises a supplementary duct (14) which is provided with an opening which faces into the hydraulic chamber by a normal-close compensation valve (15) which can be driven to an opening position by the diaphragm (3). The diaphragm pump (3) is characterized in that the compensation valve (15) is driven by the diaphragm (3) of the free end (16a) of the rod (16) which pushes against and controls the valve; the diaphragm (3) is subject to the force of a pumping and suction booster spring (13); the spring (13) cooperates with the valve (15) and pushes back the free end (16a) of the control rod (16) to the diaphragm (3) and returns to a closed position; the spring (13) is matched with the valve (15) so as to form a movable component which can be moved without the deformation of the diaphragm (3) during the pumping and suction stroke.
Description
Technical field
The present invention relates to the hydraulic pressure driven membrane pump that its barrier film can be protected when actuator chamber leaks in hydraulic fluid contingency.
Background technique
The overtravel of suction is to cause owing to lack liquid in being used to drive the hydraulic pressure cavity of barrier film.In fact, in the pump of some type, this overtravel can not take place, because when aspiration stroke stops, barrier film is resisted against a surface that is used to limit its stroke.This can cause taking place in the hydraulic pressure cavity cavitation, and, in any case the cubic capacity of pump all can reduce.In some pump, the aspiration stroke of its barrier film is without any mechanical constraint, and overtravel not only can reduce performance, but also can cause the overtired of barrier film and distortion, and these all can jeopardize its life length.
The overtravel of transmission is owing to too much causing at the hydraulic pressure intracavity liquid that is used to drive barrier film.If for example pump has stopped having set up for a long time suction in active chamber, just may run into this situation.Because the cause of the mechanical clearance that can operate, hydraulic control chamber can make its volume increase gradually and be full of fluid from liquid-storage container by capillary pipeline.When next time, pump started, this barrier film just may break.
These phenomenons are well-known, and existing numerous equipment are corrected them.Can notice the pump of the specified safety check of opening when having back plate or the grid that barrier film can bear against and in hydraulic pressure cavity, reaching the suction critical value, be used for replenishing cavity.If critical value is very big, the parectasis and the flow rate stability of oil suffer damage in the hydraulic pressure cavity.Have been found that since the inertia of movable component suction stage begin have the suction peak-peak, and can cause opening too early of specified valve, cause transmitting harmful overcompensation.
File FR2557928 described provide according to the pump operation principle, automatic leak compensation.This system also is subjected to overcompensation easily.
Be also noted that file EP0547404.The position that the equipment of wherein describing adopts with barrier film is reached is associated and the valve that opens or closes.
Therefore, in order to eliminate the transmission overtravel, valve interrupts the connection between hydraulic pressure cavity two-part, and thus, when barrier film had arrived transmission terminal point reference position, the liquid that will contact with barrier film was isolated with the liquid that contacts with piston.Then, too much driving fluid is transferred to storage tank by safety valve.
Equally, in order to eliminate the suction overtravel, when barrier film reaches suction terminal point reference position, valve open.This is opened hydraulic pressure cavity is communicated with oil supply tank by refill conduit, and the additional movements of piston can suck the oil of compensation volume in the hydraulic pressure cavity.
For by barrier film control or drive for the recuperation valve that changes state, to accomplish this point that barrier film just must produce a power that is suitable for being used for overcoming from the drag that valve is remained on its spring of closing additional tubulose attitude.This power that need overcome can limit the intake that pump can transmit.In other words, under the pump function situation that swabbing pressure reduces, canceller can not operate, then generation cavitation and can not the open valve hydraulic driving chamber in.Therefore be appreciated that the power that reduction pushes against valve its valve seat is best to avoid excessively worsening the pump running in the suction.But this power may be reduced to hardly below the value corresponding to 0.3 crust (3 meter water columns or 30,000 handkerchiefs).
Therefore, has medium sized pumping power by barrier film diaphragm pump that drive, that the leakage compensation system is housed.
Summary of the invention
The present invention relates to a kind of pump, wherein for the compensation of carrying out from the leakage of hydraulic pressure cavity be subjected to drive controlling and wherein pumping power obtained sizable raising.
Therefore the invention provides a kind of diaphragm pump, be included in the body, be arranged on the hydraulic control chamber of carrying out between pistons reciprocating (8) and the barrier film (3), this pump comprises and is used to compensate the device that hydraulic pressure cavity is leaked, described device comprise by can by barrier film be driven into open position normally closed compensation valve and to the refill conduit of hydraulic pressure cavity inner opening.
According to major character of the present invention, above-mentioned compensation valve is driven by the free-ended barrier film that bears against the bar that is used to control described valve, and barrier film is subjected to aspirating the power of power assistant spring, described spring cooperates with above-mentioned valve, push back to barrier film by the free end with controlling rod and turn back to its closed position, and described spring and described valve association join and do not need just moving assembly movably of diaphragm deflection when forming the suction overtravel.
The suction power assistant spring bears against the shoulder that is positioned at boom end at distance valve one segment distance place, and described bar is fixed on the barrier film and extends into the hydraulic pressure cavity of pump from barrier film.
The advantage that this specific setting has is to make the effect of opening the compensation valve not need to overcome any power that is used to hold it in closed condition.This can make and can obtain the aspiration increase, compares with 7 common meter water columns, can be near 10 meter water columns.This valve and shoulder move along the direction that barrier film moves.
In running, the masterpiece that is used for the compensation valve is remained on closed condition changes for the function of bigger or less spring pressure because spring-loaded against shoulder relatively move with compensating between the valve.
In addition, the power of this spring trends towards making barrier film to turn back to rear positions, thereby has increased the required power that overcomes in the transmission stroke.The pressure that this increase has caused existing in the hydraulic control chamber is always greater than the pressure in the active chamber, and this is favourable, especially reduce the amount of bleeding from working oil aspect.
For the compensation valve two kinds of possible embodiments are arranged, or the embodiment of guiding valve form, or the embodiment of poppet valve form.In addition, the shoulder that spring bore against that is fixed to barrier film can be used to limit the transmission stroke of barrier film, perhaps by as block seat, perhaps as being used for the part of the control chamber of contiguous barrier film and adjacent piston and being provided with the valve that the remainder in the described chamber of safety valve is kept apart.
Other feature and advantage will display from the following diaphragm pump embodiment's of the present invention who provides description.
Description of drawings
Referring to accompanying drawing, wherein:
Fig. 1 is the sectional view of the pump according to the present invention;
Fig. 2 is a partial section, shows another embodiment, and its septation is subjected to the protection of anti-transmission overtravel; And
Fig. 3 shows the variant embodiment of compensation valve.
Embodiment
Usually, the hydraulic control diaphragm pump comprises that this part 1,2 has the circumference of the barrier film 3 that is clipped between them by two parts 1 and the 2 pump bodies of being formed.
The part 1 of barrier film and body limits pump chamber 4 together, and suction lead 5 and transmitting catheter 6 all end at this chamber, and the safety check (not shown) are housed all.
The part 2 of barrier film and body limits the cavity 7 that is filled with hydraulic fluid together, and described hydraulic fluid can be by piston 8 (to the left side of figure) or the displacement backward circularly forward of to-and-fro motion driving.This provides the hydraulic control to pump chamber 4 Volume Changes.
Cavity 7 also is equipped with safety valve 9 usually, be used for transmission pressure is limited in the predetermined safety value and it usually be used for being used in combination to controlling the equipment that fluid bleeds.
In Fig. 1, should can be observed cavity 7 and have two parts.The part 7a of substantial cylindrical is on piston 8 next doors, and part 7b port opens on barrier film 3 next doors.Part 7a and 7b are interconnected by connecting duct 10 by divider 2a.
When abutment walls 2a, poppet valve 15 cuts out the outlet of annulus line 17, annulus line 17 to small part be formed on the bar 16 that is connected to poppet valve around, and the end of conduit 14 is at annulus line 17 split sheds.The bar 16 of poppet valve 15 forms sleeve pipe, and the bar 12 that is fixed to barrier film 3 slides therein.This bar 12 is provided with shoulder 11 (being bell in this example) to be formed for the block seat of spring 13 at its free end, and resistance and its other end to barrier film 3 when spring 13 provides suction bear against the poppet valve 15 that tends to it is compressed wall 2a.
The hardness of barrier film is made in that it trends towards opening poppet valve 15 without any when suction, when barrier film 3 arrives its reference position (corresponding to the position in the barrier film rest configuration), it can move poppet valve 15 and opened the connection between conduit 14 and the cavity 7 thus.This opening do not need to overcome any power, because when barrier film contacted with the controlling rod 16 that is used for poppet valve 15, the spring force on the poppet valve 15 had been cancelled.This masterpiece is used between shoulder 11 and the barrier film 3 then, and their are formed jointly and poppet valve 15 is together, non-deformable moving assembly.Therefore do not need power to open recuperation valve, and the pressure suction stage cavity 7 in is substantially equal to the pressure pump chamber 4 in, thereby can carries out big vacuum capacity and aspirate, and under any circumstance pressure always clings to less than 0.3.
In the beginning of transmission stroke, poppet valve 15 cuts out, and just must overcome the power of spring 13 then before barrier film 3 can being moved forward.Pressure in the cavity 7 is usually greater than the pressure in the pump chamber 4 then, and this good running to pump (for example, the less of any dissolved gas being bled) is favourable.When the transmission stroke stopped, shoulder 11 can be by bearing against the stroke that poppet valve 15 or wall 2a limit barrier film 3.
In modified example shown in Figure 2, shoulder 11 is forms of bell 11a, and it forms and is suitable for closing the valve of path 10 to the outlet of the part 7a of hydraulic pressure cavity, and when barrier film 3 passed through the transmission ending reference position, it can separate part 7b and described part 7a.This part 7a and safety valve 9 permanent communication, thus any continuous stroke that makes piston 8 is after barrier film 3 reaches the transmission ending position, makes unnecessary fluid be transferred in the oil supply tank by safety valve 9.
In Fig. 3, valve element 15 is made up of guiding valve 18, and guiding valve 18 is slidably mounted in the hole in the divider 2a of body 2 of pump.This guiding valve 18 is tubuloses and has back-up ring 19 in its end away from barrier film, and has the spring 13 that compresses here and be pressed in shoulder 11 (valve 11a) below, therefore trends towards back-up ring 19 is compressed the divider 2a of the body 2 that connecting duct 10 passed through.The external diameter of guiding valve 18 is stair-stepping, thereby when making back-up ring 19 compress divider 2a, large outer-diametric portion 18a covers the outlet in 14 pairs of holes of conduit.When back-up ring 19 during away from divider 2a, the small diameter portion of guiding valve 18 is opened the outlet of conduit 14, and cavity 7 can replenish by aspirating.
Guiding valve 18 forms sleeve pipe, and the bar 12 of valve 11a or shoulder 11 slides therein.Be positioned at the reference position that barrier film is reached when stopping near aspiration stroke away from the end 18c of the slip of back-up ring 19.
In case barrier film 3 reach its suction stop reference position, when promptly in case it contacts with the end 18c of guiding valve 18, the outlet in conduit 14 holes of feeding in divider 2a just is covered, and produces thus and the identical effect of description that sees figures.1.and.2 and carried out.
Return Fig. 1, as can be seen, the part 2 of pump body constitutes the shell of hydraulic chamber 7.This shell belongs to general structure 20, this general structure also be formed for the bearing of drive motor 21 and be used for motor 21 and piston 8 between the housing of transfer mechanism, this mechanism is not shown and normally comprise the system of worm gear and worm screw, and this worm gear is equipped with and is used for the reciprocal eccentric wheel of driven plunger.
This housing also comprises the oil groove 22 that is used for transfer mechanism.This housing 20 communicates by the storage tank 14a of filter 23 with the part 2 of pump body.Therefore, when needing to compensate in the cavity 7, from storage tank 14a draw fluid, storage tank 14a then uses the lubricant oil of drawing by filter 23 to fill up, and this lubricant oil itself is from the oil groove in the housing 20.Should find that in the figure, the fluid in the cavity 7 turns back in housing 20 inner oil sumps 22 by safety valve 9 transmission.
This layout has been simplified pump structure.Use all has the independent fluid that is used for the hydraulic control chamber by the prior art pump of the recuperation valve of barrier film control, to guarantee its purity, because lubricating fluid is filled with the particulate of the moving member that lubricates from it gradually.But in order to preserve the suction of receiving amount, specified valve must be decided to be minimum level, obtain displacement with regard to available very little power like this.These force rates those be used for overcoming by the needed power of undesirable frictional force that particle produced that may block valve little.Device of the present invention makes might without the valve return spring and be used to compensate purpose power: this just can accept comparatively impure fluid.
Claims (7)
1. diaphragm pump, it is at pump body (1,2) comprise in: be arranged on a hydraulic control chamber (7) of carrying out between a pistons reciprocating (8) and the barrier film (3), described pump comprises the compensation device that is used to compensate hydraulic control chamber (7) leakage, described compensation device comprises by being driven into the refill conduit (14) of the normally closed compensation valve (15) of open position to hydraulic control chamber inner opening by barrier film (3), it is characterized in that, described compensation valve (15) is driven by the barrier film (3) of the free end (16a) that compresses the bar (16) that is used to control described valve, described barrier film (3) is subjected to aspirating the power of power assistant spring (13), described spring (13) is cooperated with above-mentioned valve (15), push back to described barrier film (3) by the free end (16a) with described controlling rod (16) and to turn back to the valve closed position, described spring (13) is cooperated with described valve (15) and is not needed just moving assembly movably of described barrier film (3) distortion when forming the suction overtravel.
2. diaphragm pump as claimed in claim 1 is characterized in that, described compensation valve is poppet valve (15).
3. diaphragm pump as claimed in claim 1 or 2 is characterized in that, described compensation valve is guiding valve (18).
4. diaphragm pump as claimed in claim 1, it is characterized in that, described suction power assistant spring (13) is arranged between described valve (15) and the shoulder (11), and described shoulder (11) is by the end bearing of the bar (12) that is fixed to described barrier film and extends along the axis of described valve (15).
5. diaphragm pump as claimed in claim 4 is characterized in that, described shoulder (11) is formed the block seat that is used for restriction barrier film (3) displacement when the transmission stroke stops.
6. diaphragm pump as claimed in claim 5, it is characterized in that, there are two parts in described hydraulic control chamber (7), one of them part (7a) is near piston, and another part (7b) is near barrier film, two parts are by path (10) interconnection, and described block seat (11) forms valve (11a), are used to close the outlet of described path (10) of the part (7a) of the adjacent piston that feeds described hydraulic control chamber.
7. diaphragm pump as claimed in claim 1, comprise a general structure (20), described general structure (20) forms as the bearing of drive motor (21) and the housing of oil groove (22) that is used for the transfer mechanism of the piston (8) from motor (21) to pump and is used for lubricating the oil of this mechanism, it is characterized in that described hydraulic control chamber (7) is by described refill conduit (14) and filter (23) and described housing (20) permanent communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100852213A CN101245777B (en) | 2007-02-13 | 2007-02-13 | Hydraulic pressure driven membrane pump with leakage compensation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100852213A CN101245777B (en) | 2007-02-13 | 2007-02-13 | Hydraulic pressure driven membrane pump with leakage compensation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101245777A CN101245777A (en) | 2008-08-20 |
| CN101245777B true CN101245777B (en) | 2010-09-08 |
Family
ID=39946409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100852213A Expired - Fee Related CN101245777B (en) | 2007-02-13 | 2007-02-13 | Hydraulic pressure driven membrane pump with leakage compensation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101245777B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2941749A1 (en) * | 2009-02-03 | 2010-08-06 | Milton Roy Europe | ELASTIC MEMBRANE PUMP WITH HYDRAULIC CONTROL |
| CN103147963B (en) * | 2012-09-14 | 2015-03-25 | 江苏双达泵阀集团有限公司 | Mechanical multiple automatic control oil recharging and discharging hydraulic diaphragm pump |
| DE102014109801A1 (en) | 2014-07-11 | 2016-01-14 | Prominent Gmbh | Diaphragm pump with reduced leakage supplement in case of overload |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3884598A (en) * | 1973-10-05 | 1975-05-20 | Wanner Engineering | Piston assembly for diaphragm pump |
| US4619589A (en) * | 1984-08-21 | 1986-10-28 | Alldos Eichler Kg | Diaphragm pump, particularly for dosing liquids |
| US4883412A (en) * | 1984-01-11 | 1989-11-28 | Dosapro Milton Roy | Variable capacity diaphragm pumps |
| CN2137729Y (en) * | 1992-08-31 | 1993-07-07 | 毕华照 | Slurry filling solidifying bellows pump for mine |
| US5246351A (en) * | 1991-12-17 | 1993-09-21 | Lews Herbert Ott Gmbh & Co. | Hydraulically driven diaphragm pump with diaphragm stroke limitation |
| US5707219A (en) * | 1995-10-04 | 1998-01-13 | Wanner Engineering | Diaphragm pump |
| US6481982B1 (en) * | 1998-02-17 | 2002-11-19 | Nikkiso Company Limited | Diaphragm pump having a mechanism for preventing the breakage of the diaphragm when a discharge check valve is not completely closed due to the insertion of foreign matter into the valve |
-
2007
- 2007-02-13 CN CN2007100852213A patent/CN101245777B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3884598A (en) * | 1973-10-05 | 1975-05-20 | Wanner Engineering | Piston assembly for diaphragm pump |
| US4883412A (en) * | 1984-01-11 | 1989-11-28 | Dosapro Milton Roy | Variable capacity diaphragm pumps |
| US4619589A (en) * | 1984-08-21 | 1986-10-28 | Alldos Eichler Kg | Diaphragm pump, particularly for dosing liquids |
| US5246351A (en) * | 1991-12-17 | 1993-09-21 | Lews Herbert Ott Gmbh & Co. | Hydraulically driven diaphragm pump with diaphragm stroke limitation |
| CN2137729Y (en) * | 1992-08-31 | 1993-07-07 | 毕华照 | Slurry filling solidifying bellows pump for mine |
| US5707219A (en) * | 1995-10-04 | 1998-01-13 | Wanner Engineering | Diaphragm pump |
| US6481982B1 (en) * | 1998-02-17 | 2002-11-19 | Nikkiso Company Limited | Diaphragm pump having a mechanism for preventing the breakage of the diaphragm when a discharge check valve is not completely closed due to the insertion of foreign matter into the valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101245777A (en) | 2008-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7654801B2 (en) | Hydraulically-actuated diaphragm pump with a leak compensation device | |
| EP1975409B1 (en) | Zero emissions reciprocating pump | |
| CN101743403B (en) | Diaphragm pump and diaphragm pump position control method with offset valve axis | |
| US8511219B2 (en) | Zero emissions reciprocating pump | |
| JP4975764B2 (en) | accumulator | |
| KR20080091486A (en) | Hydraulic device with a lubricating pump | |
| CN101245777B (en) | Hydraulic pressure driven membrane pump with leakage compensation equipment | |
| CA2966733C (en) | Diaphragm pump with dual spring overfill limiter | |
| US4993924A (en) | Reciprocating pump | |
| CN115163467B (en) | Reciprocating pump capable of timely supplementing oil | |
| JPH05141365A (en) | Fluid pressure device | |
| US9964105B2 (en) | Diaphragm pump having position control | |
| KR100964743B1 (en) | Hydraulic metering pump | |
| CN113432027B (en) | Grease pump head and grease pump | |
| CN111005851A (en) | Displacement feedback variable mechanism of hydraulic plunger pump and hydraulic plunger pump | |
| CN219492505U (en) | Hydraulic single plunger pump | |
| RU67195U1 (en) | MEMBRANE HYDRAULIC DRIVE DOSING PUMP | |
| RU2815747C1 (en) | Reciprocating pump capable of timely replenishment of oil reserves | |
| KR102281585B1 (en) | grease discharge pump using self-pressure directional valve | |
| JP4542294B2 (en) | Improved high pressure pump | |
| KR20230055570A (en) | Tank pressurization system to prevent cavitation of working fluid | |
| NZ731534B2 (en) | Diaphragm pump with dual spring overfill limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20220213 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |