CN1304755C - Pump for pressure to fluid and fluid box device with said pump - Google Patents
Pump for pressure to fluid and fluid box device with said pump Download PDFInfo
- Publication number
- CN1304755C CN1304755C CNB031102441A CN03110244A CN1304755C CN 1304755 C CN1304755 C CN 1304755C CN B031102441 A CNB031102441 A CN B031102441A CN 03110244 A CN03110244 A CN 03110244A CN 1304755 C CN1304755 C CN 1304755C
- Authority
- CN
- China
- Prior art keywords
- pump
- fluid
- housing
- chamber
- motor cavity
- 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
Landscapes
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The present invention relates to a pump for pressurizing fluid. Fluid in a fluid storage cavity of a fluid box has saturated pressure which is higher than atmosphere pressure at room temperature. The pump is positioned near the fluid box, and is provided with a shell body and a heat quantity generating mechanism. The shell body is provided with a pump cavity, a motor cavity and a communicating channel between the pump cavity and the motor cavity, and comprises at least one guiding opening which is used for guiding the fluid to the shell body from the fluid storage cavity and outflow openings which are positioned on the guiding openings and are used for flowing back the fluid to the fluid storage cavity from the shell body. The heat quantity generating mechanism is positioned in the shell body. The fluid circularly flows in the shell body through the guiding openings, and flows out of the shell body through the outflow openings so as to obviously reduce the temperature in the shell body.
Description
Technical field
The present invention relates to a kind of pump that is used for to pressurized with fluid, and be particularly related to circulation of fluid by this pump.
Background technique
Unexamined Japan Patent prospectus has disclosed a kind of pump that is used for to pressurized with fluid for 9-88807 number.Pump has the overall structure that comprises oil hydraulic pump (pump mechanism) and electric motor (motor mechanism) in same unit housings.Pump also comprises and is used for oil is discharged into the electric motor side, is discharged into the oil duct of the outside of housing then from oil hydraulic pump.Therefore, but electric motor of the oil cooling of discharging.Yet, do not provide oil is imported its inner introducing port from the outside of housing, and only have the discharging oil that from pump, discharges to come cooling motor.Because cooling only realizes by discharging oil, therefore suitable low of the efficient of cooling.
Unexamined Japanese Utility Model prospectus has also disclosed a kind of fluid pump 4-57693 number.Fluid pump comprises pump mechanism and motor mechanism.Fluid pump also comprises two communication passage that the housing that passes fluid pump bores, and communication passage is positioned at the position in abutting connection with motor mechanism.Fluid enters in the housing by a passage, and discharges by another passage, with cooling motor mechanism.
Desired acquisition be the pump that is used for to pressurized with fluid, it is coolant pump mechanism and motor mechanism effectively, and the fluid tank device that uses said pump to obtain.
Summary of the invention
According to the present invention, a kind of pump that is used for to pressurized with fluid is provided, in the fluid storage chamber of fluid tank, fluid at room temperature has the saturation pressure higher than atmospheric pressure, pressurized with fluid is by injecting fluid through described pump intake and discharge pressure fluid from the exhaust port of described pump and finish, and this pump comprises housing, and this housing defines pump chamber and motor cavity, it is characterized in that this pump has: at least one introducing port that is used for fluid is imported from the fluid storage chamber housing; Be positioned at above the introducing port and be used to make fluid to flow back into the outflow opening in fluid storage chamber from housing, be communicated with pump chamber and motor cavity by communication passage, thereby the heat that is produced mechanism's generation by the heat that is arranged in housing makes fluid flow into this housing by the introducing port circulation, and flow out this housing by outflow opening, to reduce the temperature in the housing.
Simultaneously, the invention provides a kind of fluid tank device, comprise: a fluid tank, it has the fluid storage chamber that is used for store fluid, and this fluid at room temperature has the saturation pressure higher than atmospheric pressure; Pump in accordance with the present invention, it is installed on this fluid tank.
In pump of the present invention or fluid tank device, introducing port can be near the pump chamber bottom or near the motor cavity bottom on housing.Introducing port can connect fluid storage chamber and pump chamber with the distance of minimum, or connects fluid storage chamber and motor cavity, to reduce the flow resistance of fluid.Housing is contained in the fluid tank substantially.Pump chamber and motor cavity perpendicular or be horizontally disposed with, introducing port only is arranged near the housing bottom.It is pump mechanism that heat produces mechanism, or motor mechanism.
Others of the present invention and superiority will present from following explanation, and with the form of example principle of the present invention will be shown in conjunction with the drawings.
Description of drawings
The feature that the present invention is considered to have novelty is described in accompanying Claim especially.With reference to the explanation of following currently preferred embodiment, the present invention may be better understood and purpose and superiority in conjunction with the drawings.
Fig. 1 is the cross-sectional schematic of petrolift according to a first embodiment of the invention;
Fig. 2 is the skeleton diagram of fluid fuel supply system according to a first embodiment of the invention;
Fig. 3 is the cross-sectional schematic according to second embodiment's petrolift of the present invention; With
Fig. 4 is the cross-sectional schematic according to the 3rd embodiment's petrolift of the present invention.
Embodiment
1 and 2 first embodiment of the present invention is described below with reference to the accompanying drawings.Fig. 2 is the schematic representation that is used for supplying with to fuel injection system F the fluid fuel supply system of dimethyl ether fuel (DME fuel) or fluid.Fuel injection system F is connected on the internal-combustion engine E as the diesel engine formula of automobile driving source.This fluid fuel supply system comprises fuel tank 11 and petrolift 12.Fuel tank 11 is as storing DME (dimethyl ether) fluid tank.Petrolift 12 is arranged in the fuel tank 11, and as the pump to pressurized with fluid, supplies with DME from fuel tank 11 to fuel injection system F with the form of liquid.DME above-mentioned has higher saturation pressure than atmospheric pressure under the room temperature situation.When being used for when the inlet 16 that fuel tank 11 injects DME is closed, fuel tank 11 is isolated the inner space of casings 11, and keeps itself and external pressure internal pressure independently mutually.Fuel tank 11 and petrolift 12 constitute fuel tank apparatus or fluid tank device.
Petrolift 12 is contained in the fuel tank 11 basically.Petrolift 12 is fixed on the bottom of fuel tank 11.Petrolift 12 is connected with fuel injection system F by being used for supplying with the supplying duct 13 that pumps the DME that comes from petrolift 12 to fuel injection system F.Fuel injection system F is connected with fuel tank 11 by the return-flow catheter 17 to fuel tank 11.From petrolift 12 to fuel injection system F supply with but the unnecessary DME that do not utilized fully by fuel injection system F flow back to by return-flow catheter 17.
As shown in fig. 1, the housing of petrolift 12 comprises center housing 21, motor casing 22 and basic shell 23.Motor casing 22 is by being bolted to the upper end of center housing 21.Base shell 23 is by being bolted to the lower end of center housing 21.Bolt does not illustrate in the drawings.
Pass fuel tank 11 and be formed with through hole 11A.Annular mounting base 11B is welded among the through hole 11A of fuel tank 11.Petrolift 12 is fixed on the fuel tank 11.The basic shell 23 of petrolift 12 passes through unshowned in the drawings bolt on the mounting base 11B of fuel tank 11.Liner 15 is inserted in around between the upper surface and mounting base 11B of the flange 23A of the periphery formation of basic shell 23, with sealing gap therebetween.Petrolift 12 is arranged in the fuel tank 11 in the mode that the lower end of basic shell 23 is exposed to fuel tank 11 outsides.The space of petrolift 12 outside is fuel storage chamber or fluid storage chambeies of fuel tank 11 in fuel tank 11.
In center housing 21, define pump chamber 24.In motor casing 22, define motor cavity 25.Motor cavity 25 is vertically set on the top of pump chamber 24.Pump chamber 24 and motor cavity 25 are separated by the central block in center housing 21 26, and are interconnected by communication passage 26A.Communication passage 26A is positioned in abutting connection with the position of pump chamber 24 upsides, as DME exhaust port to motor cavity 25 discharges in pump chamber 24.
The upper end of live axle 27 is supported on motor casing 22 by being assemblied in to be arranged in abutting connection with the mounting hole of motor cavity 25 upsides or the ball bearing 28 of exhaust port 22A.Motor cavity 25 is connected with the outside or the fuel storage chamber of housing by tap hole 22A.The lower end of live axle 27 is supported by the bearing 29 that is assemblied among the mounting groove 23B that is formed in the basic shell 23.
Axial piston pump mechanism 33 is arranged in the pump chamber 24.Reciprocating pump mechanism 33 comprises the cylinder body 34 that engages with the splined joint form with live axle 27, thus in pump chamber 24 to rotate integratedly with live axle and along moving with respect to the axial direction of live axle 27.Cylinder body 34 comprises a plurality of cylinder hole 34A that are provided with around live axle 27.Two cylinder holes have been shown among Fig. 1.Pump mechanism 33 and motor mechanism 30 all are the equal of that heat produces mechanism.
In each cylinder hole 34A, all accommodate piston 35, so that it moves back and forth therein.On central block 26, be formed with cam face 26B, and be positioned at predetermined angular position place with respect to live axle 27 axial directions.Crawler shoe 36 is slidably facing to cam face 26B, and is connected with each piston 35 by spherojoint 37.
The bottom of pump chamber 24 is to be determined by the part of the upper-end surface of basic shell 23.Valve port forms plate 38 and is fixed on the upper-end surface of basic shell 23.The upper-end surface that valve port forms plate 38 and the lower end surface of cylinder body 34 slide over each other with the surperficial form that contacts each other.
Near the center of cylinder body 34, define a chamber 34B.Helical spring 39 is arranged among the 34B of this chamber, and round live axle 27.The thrust of helical spring 39 is applied on the cylinder body 34 by the spring seat 40 that is fixed on the cylinder body 34, also is applied on the crawler shoe retainer 44 by spring seat 41, pin 42 and pivot 43 simultaneously.Crawler shoe retainer 44 engages with crawler shoe 36, and crawler shoe 36 is pressed on the cam face 26B by the thrust that is applied on the crawler shoe retainer 44.Cylinder body 34 is pressed on the valve port formation plate 38 by the thrust that is applied on the spring seat 40.
When the rotation of cylinder body 34 and live axle 27-body ground, each piston 35 moves back and forth in the predetermined stroke length range by the angle of inclination defined of cam face 26B.Each cylinder hole 34A selectively is connected with the suction port 38A or the exhaust port 38B of valve port formation plate 38.Therefore, the DME in the fuel storage chamber imports among the cylinder hole 34A by inlet 11C, suction passage 23C and suction port 38A, and the DME in the cylinder hole is discharged by pump action by exhaust port 38B subsequently.The DME that discharges is sent among the fuel injection system F by outlet 23D and supplying duct 13.
When motor mechanism 30 driven plunger pump mechanisms 33, because in the friction of each sliding position of reciprocating pump mechanism 33 and because the rotation of motor mechanism 30 will produce heat.The heat that is produced will heat the DME in pump chamber 24 and motor cavity 25.Because DME is heated, the convection current that DME will make progress by the DME bubble of warmed-up DME and evaporation in chamber 24 and 25 from the downside side flow that makes progress.
Because above-mentioned flowing, the DME in the fuel storage chamber imports in the pump chamber 24 by opening 21B, communication passage 21A and introducing port 24A.DME in pump chamber 24 further imports in the motor cavity 25 by communication passage 26A subsequently.DME in motor cavity 25 passes through from the stator 31 of motor mechanism 30 and the gap between the rotor 32, and finally gets back in the fuel storage chamber by gap in ball bearing 28 and mounting hole 22A.Because the above-mentioned of DME flowed, reciprocating pump mechanism 33 and motor mechanism 30 have obtained cooling effectively.
In this structure, because the heat that reciprocating pump mechanism 33 and motor mechanism 30 are produced makes the DME in fuel tank 11 heat and evaporation, the pressure in fuel tank will increase.Because the increase of pressure, the pressure minimum in the 34A of cylinder hole also will increase in the suction circulation of reciprocating pump mechanism 33.Therefore, pressure maximum and the pressure reduction between the pressure minimum in the 34A of cylinder hole will reduce, and pressure maximum is identical with the DME head pressure basically.Therefore, the load that is applied in the reciprocating pump mechanism 33 also will reduce.
According to first preferred embodiment, following superiority effect will be obtained.
(1) DME in the fuel storage chamber of fuel tank 11 imports in the pump chamber 24 by introducing port 24A, and gets back in the fuel storage chamber by communication passage 26A.Communication passage 26A be positioned at pump chamber 24 upsides above, and mounting hole 22A is positioned at the position that is adjacent to motor cavity 25 upsides.The mobile of above-mentioned DME is because the heat that reciprocating pump mechanism 33 and motor mechanism 30 are produced causes.Communication passage 26A and mounting hole 22A lay respectively at pump chamber 24 and motor cavity 25 above.Therefore, DME flows to the outside of housing by communication passage 26A and mounting hole 22A effectively, and gets back in the fuel storage chamber.Above-mentioned DME mobile cooling piston pump mechanism 33 and motor mechanism 30 ideally.Because the above-mentioned relative position of communication passage 26A and mounting hole 22A, the DME bubble almost can not rest in chamber 24 and 25.Because upwards flowing of DME bubble also will produce flowing of some DME.
(2) introducing port 24A is positioned near the bottom of pump chamber 24.DME imports to the downside of pump chamber 24 and the side flow that makes progress.Promptly the DME in pump chamber 24 easily flows in the upward direction.Therefore, the cooling effectiveness in pump chamber 24 will improve.
(3) in the present embodiment, motor cavity 25 be positioned at pump chamber 24 above, and the DME in pump chamber 24 imports to motor cavity 25 by near the communication passage 26A that is arranged in motor cavity 25 downsides.Be that DME flows out from the downside importing of motor cavity 25 and from upside.Therefore, the cooling effectiveness in motor cavity 25 increases.
(4) DME that imports in the pump chamber 24 by introducing port 24A will get back in the fluid storage chamber by motor cavity 25 according to flowing of causing of the heat that produces in pump chamber 24 and motor cavity 25.Since motor cavity 25 along the direction of perpendicular be arranged on pump chamber 24 above, DME easily flows to the motor cavity 25 from pump chamber 24.Consequently, DME easily flows through pump chamber 24 and motor cavity 25.
(5) introducing port 24A be located at the housing periphery wall on, the opening 21B that is adjacent to introducing port 24A is connected.Compare with the introducing port that is connected with opening, opening is positioned on the housing periphery wall away from introducing port, and the passage of be interconnected introducing port 24A and opening 21B is suitable weak point.Therefore, when DME is imported housing, DME will be subjected to quite little resistance in this section passage.Be that DME imports effectively with slight drag.
(6) whole housing is contained in the fuel tank 11 basically.Therefore, petrolift 12 is assemblied in the fuel tank 11, and does not almost highlight from fuel tank 11.In addition, petrolift 12 is cooled off by the DME in fuel tank 11 middle shell outsides.
(7) communication passage 26A and mounting hole 22A are positioned at the both sides of motor mechanism 30.Import to DME in the motor cavity 25 by communication passage 26A, flowed to mounting hole 22A in the gap of passing between stator 31 and the rotor 32.Therefore, improved the cooling effectiveness of motor mechanism.
(8) axial piston pump mechanism 33 is as pump mechanism.When other pump mechanism with for example gear type pump mechanism contrasted, its volumetric efficiency increased.
4 second preferred embodiment of the present invention described below with reference to accompanying drawings.Second preferred embodiment of petrolift 12 comprises basically the chamber 24 and 25 of first preferred embodiment that is provided with along horizontal mode.Introducing port 25A is arranged in abutting connection with the position of motor cavity 25.Other assembly is identical with first embodiment basically.In second embodiment identical reference character represent with first embodiment in corresponding assembly, and the explanation of having omitted basic identical assembly here.
As shown in Figure 4, petrolift 12 in the present embodiment is mounted near the installation base portion 11B in bottom on the sidewall that is fixed in fuel tank 11, that be positioned at fuel tank 11.Pump chamber 24 and motor cavity 25 are arranged in the petrolift 12 along the substantial horizontal mode.Be tilt about 90 degree and of first embodiment's petrolift 12 to second embodiment's horizontal position.Petrolift 12 is positioned at such direction, that is, its inlet 11C is facing to the lower surface of fuel tank 11.
Be used for from the fuel storage chamber being positioned at the downside of motor cavity 25, and be used to separate near the central block 26 of motor cavity 25 and pump chamber 24 to the introducing port 25A that motor cavity imports DME (dimethyl ether).Introducing port 25A is included in the opening 22B on the outer surface of housing.
Flow pass 22C determines on the upside of motor cavity 25, and near the left end away from the motor mechanism 30 of central block 26.Another flow pass 21C be positioned at pump chamber 24 above, and near basic shell 23.
In second preferred embodiment, because the heat that reciprocating pump mechanism 33 and motor mechanism 30 are produced makes DME flow, the DME in the fuel storage chamber imports in the motor cavity 25 by opening 22B and introducing port 25A.The part DME that imports in the motor cavity 25 flows through the stator 31 of motor mechanism 30 and the gap between the rotor 32, and flow back in the fuel storage chamber by flow pass 22C.Because mounting hole 22A and motor cavity 25 and fuel storage chamber are interconnected, the DME of another part flows through the gap between stator 31 and the rotor 32, and flow back in the fuel storage chamber by mounting hole 22A.
The residue DME that imports in the motor cavity 25 by opening 22B and introducing port 25A will import in the pump chamber 24 by communication passage 26A, and flow back in the fuel storage chamber by flow pass 21C.
Except first preferred embodiment (1), the superiority effect mentioned in the section of (2), (5) to (8), will obtain following superiority effect according to second preferred embodiment.
(9) in second preferred embodiment, pump chamber 24 and motor cavity 25 are arranged in the petrolift 12 along the substantial horizontal mode.On the contrary, in first preferred embodiment, chamber 24 and 25 is arranged in the petrolift 12 along the perpendicular mode.Compare with first preferred embodiment, the vertical height of petrolift 12 in second preferred embodiment reduced.Therefore, the amount of the needed DME of covering shell reduces to some extent in the fluid storage chamber of second preferred embodiment.Promptly use a spot of DME just can considerably be full of chamber 24 and 25.
(10) pump chamber 24 and motor cavity 25 are separated by central block 26, and are interconnected by communication passage 26A.Introducing port 25A is positioned near the central block 26 in motor cavity 25.First preferred embodiment that is positioned at away from central block 26 with introducing port wherein compares, the introducing port 25A that the center by second preferred embodiment is provided with, and then DME easily imports in these two chambeies 24 and 25.
3 the 3rd preferred embodiment of the present invention described below with reference to accompanying drawings.In the 3rd embodiment, petrolift 12 is that the mode that the housing with petrolift 12 is arranged on fuel tank 11 outsides basically is assemblied in the fuel tank 11.The position of introducing port and flow pass and first embodiment's position change to some extent.Other assembly is identical with first embodiment basically.Therefore, identical reference character is represented the essentially identical assembly with first embodiment in the 3rd embodiment, and the explanation of having omitted similar assembly here.
As shown in Figure 3, in the 3rd preferred embodiment, petrolift 12 is fixed in the bottom of fuel tank 11, is arranged on wherein so that first embodiment's petrolift 12 is vertically put upside down.Be pump chamber 24 be positioned at motor cavity 25 above.Center housing 21 is fixed in the lower end of basic shell 23, and motor casing 22 is fixed in the lower end of center housing 21.
DME in the fuel storage chamber imports among the 34A of cylinder hole by suction passage 23E and suction port 38A.Subsequently, DME supplies among the fuel injection system F by exhaust port 38B and discharge route 23F.
Introducing port 25B is located near the position motor cavity 25 bottoms in the motor casing 22.Introducing port 25B with 23 that form by basic shell, and be connected in the face of the opening 23G in fuel storage chamber.Communication passage 50 is extended to introducing port 25B from opening 23G in housing 22,21 and 23.Pump chamber 24 is connected with the fuel storage chamber by the flow pass 23H that is formed in the basic shell 23, and wherein basic shell 23 is the upsides at pump chamber 24.
In the 3rd preferred embodiment, ball bearing 28 supporting driving shafts 27 are near an end of motor mechanism 30.Ball bearing 28 is assemblied among the mounting groove 22D that determines in the motor casing 22, and does not have the mounting hole 22A in first preferred embodiment.In the 3rd preferred embodiment, because the heat that produces from reciprocating pump mechanism 33 and motor mechanism 30, DME flow into the motor cavity 25 from the fuel storage chamber by opening 23G, communication passage 50 and introducing port 25B.After this DME in motor cavity 25 flow in the pump chamber 24 by communication passage 26A.Last DME flow back in the fuel storage chamber by flow pass 23H.
Except (1) the superiority effect of being mentioned in the section of (3), (7) and (8), will obtain following superiority effect according to the 3rd preferred embodiment.
(11) petrolift 12 form that is arranged on the outside of fuel tank 11 basically with this petrolift 12 is assemblied in the bottom of fuel tank 11.Because above-mentioned relative position, even the fuel storage chamber comprises very a spot of DME, pump chamber 24 and motor cavity 25 also can easily be full of DME.Because pump chamber 24 and motor cavity 25 are full of usually to have and circulate the DME that is used to cool off, so reciprocating pump mechanism 33 and motor mechanism 30 remain on temperature desired effectively.
(12) in the 3rd preferred embodiment, because petrolift 12 is located substantially on the outside of fuel tank 11, the capacity that the Capacity Ratio petrolift 12 in the fuel storage chamber is located substantially in first preferred embodiments of fuel tank 11 inside wants big.
The present invention is not limited only to the foregoing description, and can be modified as following alternate embodiments.
In first preferred embodiment, the DME in motor cavity 25 is the outside that flows out to housing by mounting hole 22A.Yet, near the outside that DME can flow out to housing by another hole determined or flow pass the upside of motor cavity 25 in alternate embodiments.
In first preferred embodiment, introducing port 24A must be positioned near the downside of pump chamber 24.For example, in alternate embodiments, introducing port 24A can be positioned near the central block 26 or the upside of pump chamber 24.
In alternate embodiments, any place in communication passage 21A, opening 21B and introducing port 24A is provided with one-way valve, flows from the fuel storage chamber to pump chamber 24 to allow DME, and stops DME to flow to the fuel storage chamber from pump chamber 24.In other words, the DME in pump chamber 24 can not flow in the fuel storage chamber by introducing port 24A, communication passage 21A and opening 21B.Therefore, even for example when on the liquid level that the DME liquid level in the fuel storage chamber reduces, housing is exposed to DME, pump chamber 24 and motor cavity 25 also can easily be full of and circulate the DME that is used to cool off, and reciprocating pump mechanism 33 and motor mechanism 30 remain on temperature desired effectively.
In second preferred embodiment, the position of introducing port 25A boundary between away from pump chamber 24 and motor cavity 25.For example, in alternate embodiments, introducing port 25A can be positioned at the opposite side of central block 26 with respect to motor mechanism 30.
In the selected embodiment for second preferred embodiment, introducing port 25A and opening 22B are omissible, and the DME in the fuel storage chamber can import in the motor cavity 25 by mounting hole 22A.In above-mentioned alternate embodiments, mounting hole 22A is equivalent in abutting connection with the introducing port of motor cavity 25.
In the 3rd preferred embodiment, petrolift 12 is arranged on the outside of fuel tank 11 basically, and pump chamber 24 be positioned at motor cavity 25 above.In alternate embodiments, petrolift 12 is arranged on the outside of fuel tank 11 basically.Yet chamber 24 and 25 is basically along the horizontal mode setting.
In selected embodiment, be provided with filter at the opening that is communicated with introducing port, and it is arranged on the outer surface of housing for above preferred embodiment.Filter prevents that exterior materials from flowing in the housing.
In the selected embodiment for above preferred embodiment, cylinder body 34 and piston 35 are made by aluminium and iron respectively.Aluminum ratio iron has higher thermal expansion coefficient.In these embodiments, when temperature increases, because the difference on above-mentioned thermal expansion coefficient, the gap between cylinder body 34 and the piston 35 will increase.On the other hand, if when having difference will cause on the thermal expansion coefficient, do not have enough gaps, and cause between two assemblies, producing undesirable locking at high temperature.For the above reasons, in alternate embodiments,, under high-temperature condition, also be enough to prevent the locking between above-mentioned two assemblies under the room temperature situation even the predetermined gap between cylinder body 34 and the piston 35 is suitable little.In order to ensure reciprocating pump mechanism 33 relative higher operation efficiency, this gap is preferably 10 μ m or littler.
In the selected embodiment for above preferred embodiment, sliding area selectively is coated with the material that reduces surface friction drag as fluororesin.Sliding area comprises the zone between the cam face 26B that cylinder body 34 and valve port form zone between the plate 38 and the zone between piston 35,37 and the crawler shoe 36 and crawler shoe 36 and central block 26.Therefore, prevented locking effectively at sliding area.In reciprocating pump mechanism 33, because the pressure of DME liquid coating will prevent the increase of slip resistance in sliding area, the material itself that therefore reduces surface friction drag weares and teares hardly.
In the selected embodiment for above preferred embodiment, the sliding area between cylinder body 34 and piston 35 is coated with the material as the resistance of reducing friction of nickel coating or tin coating.
In the selected embodiment for above preferred embodiment, bearing 28 and each sliding area of 29 are coated with the device as the resistance of reducing friction of nickel coating or tin coating.
In selected embodiment, replace the reciprocating pump that is to use other mechanism of axial piston pump mechanism 33, for example radial piston pump mechanism, gear pump mechanism, centrifugal pump mechanism, screw pump mechanism and Roots pump mechanism for above preferred embodiment.
In selected embodiment, use fluorine Lyons (chlorofluorocarbon) or propane as fluid with saturation pressure higher than the atmospheric pressure under the room temperature situation for above preferred embodiment.
Therefore, these examples or embodiment are considered to schematically rather than are restrictive, and the present invention is not limited only to details given here, and can revise in the scope of accompanying Claim.
Claims (18)
1. pump that is used for to pressurized with fluid, this fluid at room temperature has the saturation pressure higher than atmospheric pressure in the fluid storage chamber of fluid tank (11), pressurized with fluid is by injecting fluid through described pump intake (38A) and discharging pressure fluid from the exhaust port (38B) of described pump and finish, this pump comprises housing, this housing defines pump chamber (24) and motor cavity (25), it is characterized in that, this pump has: at least one the introducing port (24A that is used for this fluid is imported to from this fluid storage chamber this housing, 25A, 25B); Be positioned at this introducing port (24A, 25A, above 25B), be used for making this fluid to flow back into outflow opening (22C this fluid storage chamber from this housing, 21C, 23H), be communicated with this pump chamber (24) and this motor cavity (25) by communication passage (26A), thereby the heat that is produced mechanism's generation by the heat that is arranged in this housing makes this fluid by this introducing port (24A, 25A, 25B) circulation flows in this housing, and by this outflow opening (22C, 21C, 23H) flow out this housing, to reduce the temperature in this housing.
2. pump as claimed in claim 1 is characterized in that, (24A 25A) is positioned on this housing bottom near this pump chamber (24) to this introducing port.
3. pump as claimed in claim 1 is characterized in that, this introducing port (25B) is positioned at the bottom of close this motor cavity (25) on this housing.
4. pump as claimed in claim 1 is characterized in that, (24A, 25A) distance with minimum connects this fluid storage chamber and this pump chamber (24) to this introducing port, to reduce the flow resistance of this fluid.
5. pump as claimed in claim 1 is characterized in that, (25A, 25B) distance with minimum connects this fluid storage chamber and this motor cavity (25) to this introducing port, to reduce the flow resistance of fluid.
6. pump as claimed in claim 1 is characterized in that, this housing is contained in this fluid tank (11) basically.
7. pump as claimed in claim 1 is characterized in that, this pump chamber (24) and this motor cavity (25) are that the mode with perpendicular is provided with, and this introducing port (24A) only is arranged near the bottom of this housing.
8. pump as claimed in claim 1 is characterized in that, this pump chamber (24) and this motor cavity (25) are provided with in substantially horizontal mode.
9. pump as claimed in claim 8, it is characterized in that, this introducing port (25A) is positioned near the position the boundary between this pump chamber (24) and this motor cavity (25), this outflow opening (22c, 21C) be positioned near each chamber, this fluid in each chamber flow back in this fluid storage chamber by this outflow opening.
10. pump as claimed in claim 1 is characterized in that, it is the pump mechanism that comprises an axial piston type pump mechanism (33) that this heat produces mechanism.
11. pump as claimed in claim 1 is characterized in that, it is motor mechanism (30) that this heat produces mechanism.
12. pump as claimed in claim 1 is characterized in that, this heat produces mechanism and comprises cylinder body made of aluminum (34) and a pump mechanism (33) of the piston (35) that is fabricated from iron.
13. pump as claimed in claim 12 is characterized in that, the gap between this cylinder body (34) and this piston (35) is 10 μ m or littler under the room temperature situation.
14. pump as claimed in claim 12 is characterized in that, the sliding area between this cylinder body (34) and this piston (35) is coated with the material that reduces surface friction drag, and wherein this material is selected from comprise nickel coating and tin coating one group.
15. pump as claimed in claim 1 is characterized in that, this fluid is selected from comprise dimethyl ether, chlorofluorocarbon and propane one group.
16. pump as claimed in claim 1 is characterized in that, this pump chamber (24) be positioned at this motor cavity (25) above.
17. pump as claimed in claim 1 is characterized in that, this motor cavity (25) be positioned at this pump chamber (24) above.
18. a fluid tank device comprises:
One fluid tank (11), it has the fluid storage chamber that is used for store fluid, and this fluid at room temperature has the saturation pressure higher than atmospheric pressure;
As each described pump in the claim 1 to 17, it is installed on this fluid tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031102441A CN1304755C (en) | 2003-04-08 | 2003-04-08 | Pump for pressure to fluid and fluid box device with said pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031102441A CN1304755C (en) | 2003-04-08 | 2003-04-08 | Pump for pressure to fluid and fluid box device with said pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1536223A CN1536223A (en) | 2004-10-13 |
| CN1304755C true CN1304755C (en) | 2007-03-14 |
Family
ID=34319653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031102441A Expired - Fee Related CN1304755C (en) | 2003-04-08 | 2003-04-08 | Pump for pressure to fluid and fluid box device with said pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1304755C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITRE20150032A1 (en) * | 2015-04-16 | 2016-10-16 | Annovi Reverberi Spa | MOTOR PUMP UNIT FOR HIGH PRESSURE WASHERS |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3610784A (en) * | 1970-03-19 | 1971-10-05 | Tecumseh Products Co | Electric motor and compressor construction |
| US4190402A (en) * | 1975-05-06 | 1980-02-26 | International Telephone And Telegraph Corporation | Integrated high capacity compressor |
| US6019027A (en) * | 1997-05-30 | 2000-02-01 | Zexel Corporation | Refrigerant compressor |
| EP1024287A1 (en) * | 1996-07-17 | 2000-08-02 | Voith Turbo GmbH & Co. KG | Pump and drive unit with drive cooling by means of the pumped liquid |
| US6447270B1 (en) * | 1998-09-17 | 2002-09-10 | Walbro Corporation | Brushless coolant pump and cooling system |
-
2003
- 2003-04-08 CN CNB031102441A patent/CN1304755C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3610784A (en) * | 1970-03-19 | 1971-10-05 | Tecumseh Products Co | Electric motor and compressor construction |
| US4190402A (en) * | 1975-05-06 | 1980-02-26 | International Telephone And Telegraph Corporation | Integrated high capacity compressor |
| EP1024287A1 (en) * | 1996-07-17 | 2000-08-02 | Voith Turbo GmbH & Co. KG | Pump and drive unit with drive cooling by means of the pumped liquid |
| US6019027A (en) * | 1997-05-30 | 2000-02-01 | Zexel Corporation | Refrigerant compressor |
| US6447270B1 (en) * | 1998-09-17 | 2002-09-10 | Walbro Corporation | Brushless coolant pump and cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1536223A (en) | 2004-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1137097A (en) | Swash plate type refrigerant compressor with improved internal lubricating system | |
| CN1862018A (en) | Linear compressor and lubricating oil pump thereof | |
| CN106194382A (en) | Explosive motor and cooling medium pump | |
| EP1302660B1 (en) | Cooling of electrical driven pump | |
| CN1779244A (en) | Sealed type compressor | |
| CN1110618C (en) | Breather chamber structure of IC engine | |
| CN1207493C (en) | Rotary slant shaft type gas compressor with multi-stepped exhaust system | |
| CN1534254A (en) | Refrigerant cycle device | |
| CN1288342C (en) | Lubricating method and device for piston-type compressor | |
| CN1304755C (en) | Pump for pressure to fluid and fluid box device with said pump | |
| CN1517547A (en) | Reciprocating pump and vacuum pump | |
| US20210205830A1 (en) | Integrated Pump Pressure Washer | |
| CN1820130A (en) | Engine | |
| CN1656328A (en) | Hydraulic tensioner | |
| CN1432735A (en) | Lubricating structure for piston-type compressor | |
| CN110397585A (en) | A kind of circulation temperature lowering formula fracturing unit | |
| US7093341B2 (en) | Method of making an axial piston pump barrel with a cast high pressure collection cavity | |
| CN216741935U (en) | Air compressor machine aircraft nose | |
| CN1869448A (en) | Vortex expansion engine | |
| CN1174159C (en) | Lubrication system for engine | |
| CN1626819A (en) | Oil supplying device in horizontal rotating type compressor | |
| CN1891564A (en) | Power unit for vehicle | |
| CN1955499A (en) | Reciprocating compressor with lubrication strength thrust bearing | |
| CN1427153A (en) | Compressor shaft having volumetric oil pump | |
| KR101006042B1 (en) | Fuel supplying device |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070314 Termination date: 20120408 |