WO2006003871A1 - 昇圧ポンプおよびこれを備えた低温流体用貯蔵タンク - Google Patents
昇圧ポンプおよびこれを備えた低温流体用貯蔵タンク Download PDFInfo
- Publication number
- WO2006003871A1 WO2006003871A1 PCT/JP2005/011783 JP2005011783W WO2006003871A1 WO 2006003871 A1 WO2006003871 A1 WO 2006003871A1 JP 2005011783 W JP2005011783 W JP 2005011783W WO 2006003871 A1 WO2006003871 A1 WO 2006003871A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- low
- booster pump
- piston
- cryogenic fluid
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
- F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/141—Details or component parts
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
-
- 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
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
-
- 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
- F04B45/02—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having bellows
-
- 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
- F04B53/02—Packing the free space between cylinders and pistons
Definitions
- the present invention relates to a booster pump that compresses and pressurizes a low-temperature fluid, and a low-temperature fluid storage tank including the same.
- a booster pump for low temperature fluid that compresses and pressurizes a fluid (eg, hydrogen, nitrogen, LNG, etc.) at a low temperature (eg, about 273 ° C to 0 ° C or less) is used for a piston head.
- a fluid eg, hydrogen, nitrogen, LNG, etc.
- a low temperature eg, about 273 ° C to 0 ° C or less
- One having a piston ring is known (for example, see Non-Patent Document 1).
- Non-Patent Document 1 Takuya Endo et al., “New Energy Vehicle”, Sankai-do, January 1995, p. 221-222
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a booster pump capable of efficiently increasing the pressure without heating the fluid and a storage tank for a low-temperature fluid including the same. To do.
- the present invention employs the following means.
- the present invention is a booster pump comprising: a piston having a piston head and a piston rod; and a cylinder having a pressurizing chamber in which the piston head is housed and fluid is compressed by one end surface of the piston head.
- a booster pump is provided in which the piston head is provided with a bellows for separating a space on the piston side and a space on the cylinder side of the pressurizing chamber.
- the space on the piston rod side of the pressurizing chamber and the space on the cylinder side are separated by the bellows, and the portion that moves in contact with the inner peripheral surface of the pressurizing chamber (for example, Since there is no conventional piston ring), heat generation in the pressurizing chamber is prevented, and heating of the fluid is prevented.
- the bellows completely separates the space on the piston rod side of the pressurizing chamber and the space on the cylinder side! /, So the cylinder side of the pressurizing chamber is moved to the piston rod side of the pressurizing chamber. As a result, fluid leakage (leakage) is prevented and pump efficiency is improved.
- a filler filling a space existing between an outer surface of the bellows and an inner peripheral surface of the cylinder is disposed.
- a ring-shaped seal member is disposed at one end of the bellows on the piston head side!
- the sealing member reduces the force on the one end surface side of the piston head and the fluid leakage to the other end surface side, reducing the pressure applied to the outer peripheral surface of the bellows.
- a low-pressure bellows can be used, the piston stroke can be increased, and the compression efficiency (pump efficiency) can be increased.
- This seal member does not have tension like a piston ring, which has been considered a problem in the past. Also, because the piston stroke is greatly limited by the bellows (the stroke is small! /), It does not generate heat like a piston ring! /.
- the piston rod has a heat insulating vacuum structure that is hollow and evacuated.
- the piston rod has a hollow structure, which reduces the weight of the piston rod, makes it possible to push up the piston with a low load, and makes the piston rod insulative by making the inside vacuum. Piston rod force Heat entry into the fluid can be reduced.
- the present invention provides a booster pump that includes at least two booster pumps, and that performs multi-stage compression by these booster pumps.
- the low-pressure pump when two booster pumps are provided, one is a low-pressure pump and the other is a high-pressure pump, so that the low-pressure pump is a low-pressure bellows.
- the low-pressure pump is a low-pressure bellows.
- the fluid can be easily boosted to a desired pressure by compressing the fluid in two stages using, for example, two pumps.
- the present invention is a cryogenic fluid storage tank for storing a cryogenic fluid at a low temperature, the boosting pump or the boosting device, a cryogenic fluid storage tank in which the cryogenic fluid is stored, and the boosting pump described above.
- the present invention provides a cryogenic fluid storage tank comprising the booster and a cryogenic container in which the cryogenic fluid storage tank is accommodated.
- the booster pump or the booster device since the booster pump or the booster device is disposed in the low-temperature container, the booster pump or the booster device is forcibly cooled and it is difficult to raise the temperature.
- the booster pump or the booster device includes the low-temperature fluid storage. It is preferable to be arranged downstream of the storage tank and outside the cryogenic fluid storage tank.
- a booster pump or a booster device is arranged outside the cryogenic fluid storage tank (i.e., the insulation of the cryogenic container). The heat generated in the booster pump or booster drive source is stored in the cryogenic fluid storage tank. Transmission to the cryogenic fluid is prevented and temperature rise and evaporation of the cryogenic fluid is prevented.
- a low-temperature slush fluid in a solid-liquid two-phase state is stored in the low-temperature fluid storage tank.
- a slush-like cryogenic fluid (solid cryogenic fluid and liquid cryogenic fluid mixed in a sherbet form) is stored in the cryogenic fluid storage layer, so that only liquid cryogenic fluid is stored. 1 evaporates, improving the suction performance of the booster pump or booster and increasing the amount of cold fluid supplied.
- a mesh is disposed at the outlet of the cryogenic fluid storage tank.
- solid cryogenic fluid is captured by the mesh, and only the liquid cryogenic fluid is supplied to the booster pump or booster located downstream of the cryogenic fluid storage tank. Moreover, clogging of the booster pump or booster is prevented.
- a heater is disposed in the cryogenic fluid storage tank.
- the solid cryogenic fluid in the cryogenic fluid storage tank is heated by the heater to be changed into a liquid cryogenic fluid, and then supplied to the booster pump or the booster through the mesh. Yes.
- a heat exchanger is disposed downstream of the booster pump or the booster.
- the low-temperature fluid that has passed through the booster pump or booster by the heat exchanger is vaporized (gasified) by heat exchange, and then supplied to the engine or the like located on the downstream side. Gin etc. are quickly consumed.
- a radiation shield plate is provided on the inner surface of the cryogenic container.
- the radiation shield plate prevents heat from entering the inside of the cryogenic container from the inside, and prevents the heat insulating vacuum layer in the cryogenic container from rising in temperature.
- the present invention includes a cylinder block having a pressurizing chamber therein, a piston head that is housed in the pressurizing chamber and reciprocates in the pressurizing chamber, and one end surface of the piston head
- a cryogenic fluid booster pump in which a cryogenic fluid is compressed by an inner surface of the piston head between one end surface of the piston head and an inner surface of the pressurizing chamber facing the one end surface.
- a low-temperature fluid booster pump that is provided with a flexible partition member that separates a circumferential space and an outer circumferential space.
- the inner space of the partition member that is, the space formed by one end surface of the piston head, the inner peripheral surface of the partition member, and the inner surface of the pressurizing chamber.
- the low temperature fluid is sucked (supplied) into the inside and the piston head is moved in the other direction, so that the low temperature fluid is compressed (pressurized) to a predetermined pressure.
- the inner peripheral side of the pressurizing chamber is changed to the outer peripheral side of the pressurizing chamber. Leakage of low temperature fluid from the outer peripheral side of the caloric pressure chamber to the inner peripheral side of the pressurizing chamber can be prevented, and the compression efficiency of the booster pump for low temperature fluid can be improved.
- the outside of the partition member is filled with a pressurized fluid.
- the outside of the partition member is filled (supplied) with, for example, a gasified low-temperature fluid having a predetermined pressure, and the pressure difference between the inside and the outside of the partition member is reduced (approached). That is, the outside of the partition member (outside in the radial direction) is heated by, for example, a heat exchanger. Since there is a low-temperature fluid that is gasified and adjusted to a predetermined pressure (for example, a pressure adjusted to half the boosting force of the booster pump, etc.) by the pressure regulator, The deformation of the partition member when compressing the low-temperature fluid sucked into the internal space of the member can be reduced, the life of the partition member can be extended, and the reliability of the booster pump for low-temperature fluid is improved. be able to.
- a predetermined pressure for example, a pressure adjusted to half the boosting force of the booster pump, etc.
- the outside of the partition member is in a vacuum state! /.
- the space between the partition member and the cylinder block is in a vacuum state, and the heat inside the partition member (that is, the heat of the low-temperature fluid compressed inside the partition member) is transmitted to the cylinder block. To prevent it.
- the present invention accommodates a piston rod driven by a drive unit connected to a drive source, a piston head connected to the piston rod and reciprocating with the piston rod, and the piston head, And a cylinder having a pressurizing chamber in which a low temperature fluid is compressed by one end surface of the piston head, wherein the driving unit is disposed on one end surface side of the piston head, A pressure pump for low-temperature fluid is provided in which a pulling force in a direction substantially the same as the extending direction of the shaft portion is applied to the shaft portion of the piston rod.
- the low-temperature fluid when the piston rod is pulled toward the drive unit, the low-temperature fluid is compressed by the one end face of the piston head.
- it when compressing a low-temperature fluid, it is configured so that the compression force is not applied to the piston rod! RU
- the diameter of the piston rod can be made smaller than that of the conventional piston rod in which the compression force is applied to the piston rod, so that heat input can be reduced and the weight of the piston rod can be reduced. And the weight of the entire pump can be reduced.
- the piston head when compressing the low-temperature fluid, the piston head can be increased in diameter because the piston rod is configured so that the compression force is not applied to the piston rod. That is, the piston mouth In conventional pumps in which compression force is applied to the cylinder, the diameter of the piston head is limited to, for example, a diameter of 40 mm in order to avoid buckling of the piston rod. Therefore, in the conventional pump, for example, 5 cylinders are required to secure the flow rate of the low-temperature fluid. In the pump of the present invention, the diameter of the piston head can be set to 100 mm, for example. Even with a single cylinder, a sufficient flow rate can be secured.
- the configuration of the pump can be simplified, and the light weight and the small diameter key of the entire pump can be achieved.
- the piston head is divided into at least two members having concentric circles, and the low temperature fluid gradually passes through the end surfaces of the divided piston heads in order.
- a multi-stage compression structure in which the pressure is increased to a desired pressure is preferable.
- the piston head is divided into a radially outer member and a radially inner member, and the first compression (first stage compression) is performed with the radially outer member, and the radially inner member is After the second compression (second-stage compression) is performed, the low-temperature fluid is pressurized rather than trying to increase the pressure of the low-temperature fluid from low pressure to high pressure. Is pressurized to a desired pressure (high pressure).
- the flexible partition that separates the piston rod side space and the cylinder side space of the caloric pressure chamber into the one end surface side and the other end surface side of the piston head. It is preferable that each member is provided.
- the space on the piston rod side of the pressurizing chamber and the space on the cylinder side are separated by a partition member, and the part that moves in contact with the inner peripheral surface of the pressurizing chamber (for example, a conventional piston ring) Therefore, heat generation in the pressurizing chamber is prevented and heating of the low-temperature fluid is prevented.
- the area of one end surface (compression surface) of the piston head can be utilized to the maximum for compressing the low-temperature fluid, more low-temperature fluid can be compressed at one time, and the high efficiency of the pump ( High performance).
- a precooling layer is formed inside the cylinder.
- the entire pump can be sufficiently cooled in advance before starting the pump, and gasification (boil-off) of the low-temperature fluid supplied to the pump can be reduced.
- this pre-cooling layer serves as a heat insulating layer even during pump operation, gasification (boil-off) of low-temperature fluid can be reduced even during pump operation.
- the drive unit and the piston rod are coupled via a heat-insulating connection unit.
- the drive unit and the piston rod are connected by point contact or line contact via rolling elements (for example, balls and rollers), so that the drive unit (i.e., drive source) is connected to the piston.
- Heat transfer heat input
- the rod ie, piston head
- the piston head and the piston rod are connected via a heat insulating material.
- the piston head and piston rod are connected to each other via force insulation. Therefore, even if there is a drive force (heat input) from the piston rod to the piston head, Heat transfer (heat input) to is blocked by the heat insulating material.
- the piston rod is interposed between the cylinder and the piston rod. It is preferable that a guide member for guiding the shaft portion of the door is provided.
- a guide member is provided so that a piston rod, a piston head, and the like that are accommodated in the cylinder and reciprocate in the cylinder do not collide with the inner wall surface (cylinder wall) of the cylinder.
- the reciprocating member force such as the piston rod and the piston head is reciprocated without shaking or vibrating in the cylinder, and the reciprocating member can be prevented from colliding with the inner wall surface of the cylinder. At the same time, the reciprocating member can be driven smoothly with minimal power.
- the space force between the cylinder and the shaft portion of the piston rod is in a vacuum state.
- the space between the cylinder and the piston rod is in a vacuum state, and heat from the piston rod force (that is, the heat that has entered the piston rod side) is prevented from being transmitted to the cylinder. And then.
- the cylinder force is immersed in a low-temperature fluid stored inside the cryogenic fluid storage tank, and is configured to be detachable from the cryogenic fluid storage tank. preferable.
- the outside of the part that accommodates the part that compresses the low-temperature fluid such as the cylinder and the piston head, is immersed in the low-temperature fluid and always kept at a low temperature.
- the cylinder is installed in the lower part (bottom part) of the cryogenic fluid storage tank in an easily replaceable manner.
- the drive unit and the cylinder force are configured to be immersed in a low temperature fluid stored in a cryogenic fluid storage tank and to be detachable from the cryogenic fluid storage tank. preferable.
- the cryogenic fluid booster pump is also equipped with a cryogenic fluid storage tank. It is installed in the lower part (bottom part) of the cup in an easily replaceable form.
- the present invention includes the above-described cryogenic fluid booster pump, a chamber for storing the cryogenic fluid boosted by the cryogenic fluid booster pump, and a fuel injection device to which the cryogenic fluid is supplied from the chamber.
- a cryogenic fluid supply apparatus is provided.
- the cryogenic fluid boosted to a desired pressure by the cryogenic fluid booster pump is stored in the chamber located downstream of the cryogenic fluid booster pump, and then passes through the fuel injection device.
- the fuel is injected into a combustion chamber such as an engine.
- the pressurized fluid in the chamber is liquefied or gasified and supplied into the cylinder located on the other end face side of the piston head of the pressurized pump for the cryogenic fluid.
- a low-temperature fluid in the chamber (or a low-temperature fluid in the chamber converted into a liquid or gas and decompressed with, for example, a pressure regulator) in the cylinder located on the other end surface side of the piston head.
- a pressure regulator in the cylinder located on the other end surface side of the piston head.
- the low-temperature fluid in the chamber is gasified on the path to the fuel injection device, and supplied into the cylinder located on the other end face side of the piston head of the booster pump for low-temperature fluid. It is preferable that a pressurized fluid supply unit is provided. As a result, the low-temperature fluid in the chamber (or the low-temperature fluid in the chamber, for example, decompressed with a pressure regulator or the like in a gasified state) is supplied to the cylinder located on the other end surface side of the piston head.
- the difference between the pressure on the one end surface (compression surface) side of the piston head and the pressure on the other end surface side can be reduced, and a bellows having low pressure resistance can be used.
- the chamber is preferably provided with a relief valve.
- the relief valve When the pressure in the chamber in which the cryogenic fluid is accumulated exceeds a predetermined pressure, the relief valve is activated, Damage to the chamber is prevented.
- the low-temperature fluid from which the relief valve force has also blown out is, for example, a pump suction side (or a separate fuel cell is provided via a return pipe). What is configured to be returned to that fuel cell)! RU
- the present invention includes a cylinder block having a pressurizing chamber therein, a piston head that is housed in the pressurizing chamber and reciprocates in the pressurizing chamber, and one end surface of the piston head
- a pump for low-temperature fluid in which the low-temperature fluid is compressed by the second end surface of the piston head, and separates the space on the inner peripheral side and the space on the outer peripheral side of the pressurizing chamber.
- a pressurizing pump for low-temperature fluid is provided.
- the low-temperature fluid when the piston head moves in one direction, the low-temperature fluid is sucked (supplied) into the pressurizing chamber, and when the piston head moves in the other direction, the low-temperature fluid is compressed (pressurized) to a predetermined pressure. ).
- the inner peripheral side of the pressurizing chamber is changed to the outer peripheral side of the pressurizing chamber. Leakage of low temperature fluid from the outer peripheral side of the caloric pressure chamber to the inner peripheral side of the pressurizing chamber can be prevented, and the compression efficiency of the booster pump for low temperature fluid can be improved.
- a pressurized fluid is filled inside the partition member.
- the inside of the partition member is filled (supplied) with, for example, a gasified low-temperature fluid having a predetermined pressure, and the pressure difference between the inside and the outside of the partition member is reduced (approached). That is, on the inner side (radially inner side) of the partition member, for example, it is heated and gasified by a heat exchanger, and the pressure is adjusted to a predetermined pressure (for example, half of the boosting force of the booster pump) by a pressure regulator. Therefore, the deformation of the partition member when compressing the low-temperature fluid sucked into the pressurizing chamber can be reduced. The service life can be extended, and the reliability of the booster pump for low-temperature fluid can be improved.
- a predetermined pressure for example, half of the boosting force of the booster pump
- the inside of the partition member is preferably in a vacuum state. Yes.
- a guide member for guiding the piston head is provided between the cylinder block and the piston head.
- a guide member is provided so that a piston rod, a piston head, and the like that are accommodated in the cylinder and reciprocate in the cylinder do not collide with the inner wall surface (cylinder wall) of the cylinder.
- the reciprocating member force such as the piston rod and the piston head is reciprocated without shaking or vibrating in the cylinder, and the reciprocating member can be prevented from colliding with the inner wall surface of the cylinder. At the same time, the reciprocating member can be driven smoothly with minimal power.
- the cylinder block force is immersed in a low-temperature fluid stored inside the low-temperature fluid storage tank and is detachable from the low-temperature fluid storage tank. , Prefer to be.
- the outside of the portion accommodating the portion that compresses the low-temperature fluid such as the cylinder block and the piston head is immersed in the low-temperature fluid, and is always maintained at a low temperature.
- the cylinder block force is installed in the lower part (bottom part) of the cryogenic fluid storage tank in an easily replaceable form.
- FIG. 1 is a schematic longitudinal sectional view showing a first embodiment of a booster pump according to the present invention.
- FIG. 2 is an enlarged cross-sectional view of a main part in which the main part of FIG. 1 is simplified and enlarged.
- FIG. 3 is an enlarged cross-sectional view of a main part showing a second embodiment of a booster pump according to the present invention.
- 4 An enlarged cross-sectional view of a main part showing a third embodiment of a booster pump according to the present invention.
- FIG. 5 is an enlarged cross-sectional view of a main part showing a fourth embodiment of a booster pump according to the present invention.
- FIG. 7 is a schematic configuration diagram of a main part showing an embodiment of a booster device according to the present invention.
- FIG. 9 is a schematic configuration diagram showing an embodiment of a cryogenic fluid storage tank according to the present invention.
- ⁇ 10 A schematic configuration diagram showing another embodiment of a cryogenic fluid storage tank according to the present invention.
- ⁇ 11 A schematic longitudinal sectional view showing a sixth embodiment of a cryogenic fluid booster pump according to the present invention.
- FIG. 12 is a cross-sectional view taken along arrow XII—XII in FIG.
- FIG. 13 A schematic longitudinal sectional view showing a seventh embodiment of a booster pump for low temperature fluid according to the present invention.
- FIG. 14 A schematic longitudinal sectional view showing an eighth embodiment of a booster pump for a low temperature fluid according to the present invention.
- FIG. 15 is a cross-sectional view taken along line XV—XV in FIG.
- FIG. 16 is an enlarged longitudinal sectional view showing a principal part of a ninth embodiment of a booster pump for low temperature fluid according to the present invention.
- FIG. 17 is a schematic longitudinal sectional view showing a tenth embodiment of a booster pump for low temperature fluid according to the present invention.
- FIG. 18 is a schematic longitudinal sectional view showing an eleventh embodiment of a booster pump for a low temperature fluid according to the present invention.
- FIG. 19 is a schematic longitudinal sectional view showing a twelfth embodiment of a cryogenic fluid booster pump according to the present invention.
- FIG. 20 is a schematic longitudinal sectional view showing a thirteenth embodiment of a cryogenic fluid booster pump according to the present invention.
- FIG. 21 is a schematic longitudinal sectional view showing a fourteenth embodiment of a booster pump for low temperature fluid according to the present invention. is there.
- FIG. 22 is an enlarged longitudinal sectional view showing another embodiment of the bellows applied to the booster pump for low temperature fluid according to the present invention.
- FIG. 23 is an enlarged longitudinal sectional view showing another embodiment of the heat insulation connecting portion applied to the booster pump for low temperature fluid according to the present invention.
- FIG. 24 is a schematic longitudinal sectional view showing a fifteenth embodiment of a cryogenic fluid booster pump according to the present invention.
- FIG. 25 is a cross-sectional view taken along the line XXV—XXV in FIG.
- FIG. 26 is a schematic vertical sectional view showing a sixteenth embodiment of a cryogenic fluid booster pump according to the present invention.
- a booster pump 1 is a so-called swash plate type (or swash type), and includes a plurality of (for example, seven) pistons 11 and a cylinder block.
- a cylinder head 13 a drive shaft 14, and a swash plate (also referred to as “yoke”) 15 are configured as main elements.
- Each piston 11 is a substantially rod-like member having a circular cross-sectional view and having a piston head 11a at one end and a piston sleeve lib at the other end, and reciprocates in a cylinder 12a described later. It is to be accommodated.
- the piston head 1 la is a so-called enlarged portion having an outer diameter larger than the outer diameter of the piston rod 11c that connects the piston head 1 la and the piston shoe 1 lb.
- the low temperature fluid for example, liquid hydrogen, liquid nitrogen, liquefied carbon dioxide, liquefied natural gas, liquefied propane gas, etc.
- the upper end face is compressed by the upper end face.
- the piston sh ib is a so-called enlarged portion having an outer diameter larger than the outer diameter of the piston rod 11c, and a part of the end face side is a slope described later.
- the plate 15 is sandwiched between the shear plate 15a and the retainer ring 15b. And the end face of the swash plate 15 slides along the inclination angle of the swash plate 15 (the sliding surface P of the thrust roller bearing 16 provided between the shear plate 15a and the retainer ring 15b). ing.
- the cylinder block 12 has cylinders 12a bored in an annular shape along the longitudinal direction (vertical direction in FIG. 1) by the same number as the number of pistons 11 in the cylinder block 12. Inside, one piston 11 is housed.
- a pressure chamber 12b having an inner diameter larger than the outer diameter of the piston head 11a is provided on one end side (the upper side in FIG. 1) of the cylinder 12a.
- the piston head 11a is housed in the pressure chamber 12b. It is becoming possible.
- Fig. 2 which is a simplified and enlarged view of the main part of Fig. 1 and Fig. 1, bellows 17 are provided in the pressurizing chamber 12b! .
- the bellows 17 includes an inner peripheral side (piston 11 side) and an outer peripheral side (cylinder block) of the pressurizing chamber 12b located 1 lb side of the piston shoe 1 lb from the piston head 1 la. 12 side) is attached (separated) to one end surface of the piston head 11a (the other end surface) and the other end is attached to the inner wall surface of the cylinder block 12. It is attached.
- the bellows 17 is made of, for example, stainless steel nickel connel having elasticity at a (very) low temperature.
- the cylinder head 13 covers one end surface of the cylinder block 12 (the upper end surface in FIG. 1), and opens the cylinder 12a inside the cylinder block 12 (that is, the opening end of the pressurizing chamber 12b). ).
- each suction port 13a and the discharge port 13b is provided with a ball type check valve 18 (a spring is not shown for simplification) so that the suction and discharge of the low-temperature fluid can be controlled.
- each suction port 13a is provided in communication with a fluid suction passage 19 perforated in the cylinder head 13, while each discharge port 13b is provided with each cylinder head 13 and cylinder. It is provided in communication with a fluid discharge path 20 formed in the dabloc 12.
- the low-temperature fluid guided from the fluid suction path 19 through the suction port 13a into the pressurization chamber 12b is compressed and pressurized by one end surface of the piston head 11a, and then the fluid discharge path from the discharge port 13b. It is led to the outside through 20.
- the drive shaft 14 transmits a driving force from a driving source (for example, an electric motor, an engine, etc.) to the swash plate 15 (not shown), and is connected to the other end of the cylinder block 12 via a bearing 21. It is supported in a rotatable manner inside.
- a driving source for example, an electric motor, an engine, etc.
- the swash plate 15 includes a shear plate 15a and a retainer ring 15b, and a sliding surface P of a thrust roller bearing 16 provided between the shear plate 15a and the retainer ring 15b is formed in the longitudinal direction of the cylinder block 12. For example, it is configured to be inclined by 1.43 degrees with respect to an axis perpendicular to the axis. Further, a part of the above-described piston sh ib is sandwiched between the retaining ring 15b and the thrust roller bearing 16.
- a thrust roller bearing 22 is also provided between the shear plate 15 and the cylinder block 12, and this thrust roller bearing 22 provides thrust (load) in the axial direction (longitudinal direction of the cylinder block 12). Is now available.
- the shear plate 15a, the retainer ring 15b, and the thrust roller bearings 16 and 22 are rotated together with the drive shaft 14.
- the piston shaft ib slides along the sliding surface P, and the piston 11 is reciprocated in the cylinder 12 to be added.
- the low-temperature fluid that has flowed into the pressure chamber 12b is successively compressed.
- the stroke of the piston 11 is set to 2 mm.
- reference numeral 23 in FIG. 1 is a communication hole that connects the pressurizing chamber 12b and the outside of the booster pump 1.
- a pipe 24 is connected to the communication hole 23, and the pipe 24
- An on-off valve 25 is arranged in the middle of the.
- the communication hole 23, the pipe 24, and the on-off valve 25 allow the low-temperature fluid existing on the other end surface side of the piston head 11a to flow out from the pressurized chamber 12b when the low-temperature fluid is taken into the pressurized chamber 12b.
- the low-temperature fluid that has accumulated in the pressurizing chamber 12b located on the other end surface side is used to flow out of the pressurizing chamber 12b.
- the on-off valve 25 is sometimes closed / closed (closed) during the compression stroke or when it is not necessary for the low temperature fluid to flow out of the pressurized chamber 12b.
- the portion that moves in contact with the inner peripheral surface of the pressurizing chamber 12b is the portion that moves in contact with the inner peripheral surface of the pressurizing chamber 12b.
- the bellows 17 completely separates the inner peripheral side and the outer peripheral side of the pressurizing chamber 12b located on the piston shaft ib side of the piston head 11a, pressurization is performed from the outer peripheral side of the pressurizing chamber 12b. Leakage of low temperature fluid to the inner peripheral side of the chamber 12b can be prevented. In other words, it is possible to prevent the low-temperature fluid from flowing out along the piston rod 11c to the side of the pressurizing chamber 12b and to the side of the piston sh ib. Thereby, the compression efficiency of the booster pump 1 can be improved.
- a second embodiment of the booster pump (for cryogenic fluid) according to the present invention will be described with reference to FIG.
- a wire material (filler) 31 that is a material force that can be used at (very) low temperature such as Teflon (registered trademark) is wound around the outer peripheral surface of the bellows 17. This is different from that of the first embodiment described above. Since the other components are the same as those of the above-described embodiment, description of these components is omitted here.
- the wire 31 is wound around the outer surface of the bellows 17 so as to fill as much as possible the gap between the outer surface of the bellows 17 and the inner peripheral surface of the pressurizing chamber 12b.
- the piston 11 is retracted in particular so that it does not come into contact with the inner surface of the pressure chamber 12b (the outer surface force of the wire 31 wound around the outer surface of the bellows 17). To avoid contact if the bellows 17 contracts.
- the gap between the outer surface of the bellows 17 and the inner peripheral surface of the pressurizing chamber 12b is filled, and the dead volume of the pressurizing chamber 12b is reduced. Increase efficiency It can be done.
- a third embodiment of the booster pump (for low temperature fluid) according to the present invention will be described with reference to FIG.
- a spacer (filler) 41 having a material force that can be used at (very) low temperature such as Teflon (registered trademark) is provided on the outer peripheral surface of the bellows 17. This is different from the second embodiment described above. Since the other constituent elements are the same as those of the above-described embodiment, description of those constituent elements is omitted here.
- each valley portion of the bellows 17 (the portion recessed toward the piston rod 11c) is filled so as to fill the gap between the outer surface of the bellows 17 and the inner peripheral surface of the pressurizing chamber 12b as much as possible.
- a spacer 41 having a substantially annular shape in plan view is disposed in a portion where the distance from the inner peripheral surface of the pressurizing chamber 12b is increased.
- the cross-sectional shape of the spacer 41 is substantially the same as the cross-sectional shape of the valley portion of the bellows 17 and does not hinder the expansion and contraction of the bellows 17.
- the points to be noted here are the outer surface force of the spacer 41 arranged in each valley of the bellows 17 so as not to contact the inner peripheral surface of the pressure chamber 12b.
- the piston 11 should not come into contact.
- the gap between the outer surface of the bellows 17 and the inner peripheral surface of the pressurizing chamber 12b is filled, and the dead volume of the pressurizing chamber 12b is reduced, so that the compression efficiency is increased. That's right.
- a fourth embodiment of the booster pump (for low temperature fluid) according to the present invention will be described with reference to FIG.
- a particulate filler 51 having a material force that can be used at (very) low temperature such as Teflon (registered trademark) is provided on the outer peripheral surface of the bellows 17. It differs from the second embodiment and the third embodiment described above in that it is filled! Since the other components are the same as those of the above-described embodiment, description of these components is omitted here.
- the outer surface of the bellows 17 and the inner peripheral surface of the pressurizing chamber 12b are filled as much as possible to fill the gap between the outer surface of the bellows 17 and the inner peripheral surface of the pressurizing chamber 12b. In this gap, the particulate filler 51 is filled!
- a ring 52 for preventing outflow is attached to one end of the bellows 17 so that the filler 51 does not flow out to the one end face side of the piston head 1 la.
- the ring 52 is formed so that its outer diameter is smaller than the inner diameter of the pressurizing chamber 12b, so that the outer peripheral surface of the ring 52 does not slide along the inner peripheral surface of the pressurizing chamber 12b. It is summer.
- Each particle constituting the filler 51 is formed such that its outer diameter is larger than the gap between the outer peripheral surface of the ring 52 and the inner peripheral surface of the pressurizing chamber 12b.
- the filler 51 is filled in such an amount that does not hinder the expansion and contraction of the bellows 17.
- the gap between the outer surface of the bellows 17 and the inner peripheral surface of the pressurizing chamber 12b is filled, and the dead volume of the pressurizing chamber 12b is reduced, so that the compression efficiency is increased. That's right.
- a fifth embodiment of the booster pump (for low temperature fluid) according to the present invention will be described with reference to FIG.
- a seal member 61 having a material force that can be used at (very) low temperature such as Teflon (registered trademark) is attached to the outer peripheral surface of one end of the bellows 17. This is different from the above-described embodiment. Since the other constituent elements are the same as those of the above-described embodiment, description of those constituent elements is omitted here.
- the outer peripheral surface of the bellows 17 is formed at one end of the bellows 17 by a low-temperature fluid.
- a seal member 61 is provided for reducing the pressure applied to the gas.
- the seal member 61 is formed so that the outer diameter thereof is substantially the same as the inner diameter of the pressurizing chamber 12b, and the outer peripheral surface of the ring 52 is slightly in contact with the inner peripheral surface of the pressurizing chamber 12b. While moving. However, the seal member 61 does not have the tension as the piston ring, which has been regarded as a problem in the past, and the stroke of the piston 11 is greatly limited by the bellows 17 (the stroke is small). , It will not generate heat like a piston ring!
- the low temperature fluid that has accumulated in the pressurizing chamber 12b located on the other end surface side of the piston head 11a passes through the communication hole 23, the pipe 24, and the on-off valve 25 described above and is not shown in the figure.
- the seal member 61 reduces the leakage of low-temperature fluid from one end surface side to the other end surface side of the piston head 11a, and the pressure applied to the outer peripheral surface of the bellows 17 is reduced. Therefore, it is possible to use a low-pressure bellows, which is not severe in strength design, and it is possible to increase the stroke of the piston 11 and increase the compression efficiency (pump efficiency).
- the outer peripheral surface of the seal member 61 moves with little contact along the inner peripheral surface of the pressurizing chamber 12b, so that heat generation in the pressurizing chamber 12b can be significantly reduced. Therefore, heating of the low temperature fluid can be reduced.
- any one of the above-described boosting pumps (for low-temperature fluid) is used as the low-pressure pump 6L, and any one of the above-described boosting pumps (for low-temperature fluid) is used for high-pressure.
- the booster 6 (for low temperature fluid) as the pump 6H will be described with reference to FIG. 7 and FIG.
- the low-pressure pump 6L compresses low-pressure (low bulk modulus! / ⁇ ) low-temperature fluid to intermediate pressure, and its bellows can withstand intermediate pressure.
- Nobelose 17a is used!
- the high pressure pump 6H compresses the intermediate pressure (high volume modulus) low-temperature fluid compressed by the low pressure pump 6L to high pressure, and the bellows can withstand high pressure.
- the severely high pressure bellows 17b is used.
- the stroke of the piston 11 can be increased, and the low temperature fluid can be easily discharged from the low pressure.
- the high pressure pump 6H uses the high pressure bellows 17b, so the stroke of the piston 11 cannot be increased.
- the voltage can be boosted. That is, if the pressure of the low-temperature fluid is increased from low pressure to high pressure using only one booster pump, the high-pressure bellows 17b must be used as the bellows, and a large stroke cannot be taken. It was difficult to increase the pressure to the desired pressure (high pressure).
- the cryogenic fluid can be easily boosted to a desired pressure by compressing the cryogenic fluid in two stages using two pumps.
- cryogenic fluid storage tank equipped with a booster pump (for cryogenic fluid) or a booster device (for cryogenic fluid) will be described with reference to FIG.
- the cryogenic fluid storage tank 7 in the present embodiment includes a (for cryogenic fluid) booster pump 71 or (for cryogenic fluid) booster 72, a cryogenic vessel 73 having an adiabatic vacuum chamber 73a therein, and a low temperature fluid storage tank. 74 and heat exchange 75 are the main elements.
- the booster pump 71 or the booster device 72 boosts the low-temperature fluid to a desired pressure.
- the booster pump 71 for example, any of the above-described booster pumps (for low-temperature fluid) 1, 2, 3, 4, 5
- the booster device 72 for example, the above-described booster device (for low-temperature fluid) 6 can be applied.
- the cryogenic container 73 is a container in which the inside is evacuated and a radiation shield plate 76 such as a copper plate is attached to the inner surface thereof.
- the above-described booster pump 71 or booster device 72, a later-described cryogenic fluid storage tank 74, and a heat exchanger 75 are accommodated in the adiabatic vacuum chamber 73a of the cryogenic vessel 73.
- the low-temperature fluid storage layer 74 stores a low-temperature (for example, liquid hydrogen) fluid (for example, liquid hydrogen) inside the low-temperature fluid storage layer 74. It is guided to the booster pump 71 or the cryogenic fluid booster 72.
- One end of the heat exchanger 75 is in contact with the inner surface of the cryogenic vessel 73 (that is, the inner surface of the radiation shield plate 76), and is boosted by the booster pump 71 or the booster 72 and guided through the pipe 78.
- the cryogenic fluid is vaporized (gasified) by heat exchange with the cryogenic vessel 73 side, and the cryogenic fluid (gas) vaporized in the heat exchanger 75 is supplied to the engine etc. via the pipe 79 It has become.
- the cold recovered by heat exchange cools the radiation shield plate 76 described above, or is stored in a cold storage material (not shown) stored in the heat insulating vacuum chamber 73! /.
- the booster pump 71 or the booster 72 is disposed in the adiabatic vacuum tank 73 a and outside the cryogenic fluid storage tank 74. (That is, provided separately from the cryogenic fluid storage tank 74 in the adiabatic vacuum chamber 73a), the booster pump 71 or the booster device 72 is forcibly cooled, making it difficult to raise the temperature. Heat generated in the drive source can be prevented from being transferred to the cryogenic fluid stored in the cryogenic fluid storage tank 74, and temperature rise of the cryogenic fluid can be prevented. It is desirable that the booster pump 71 or the booster 72 is sufficiently cooled before operation.
- cryogenic fluid storage tank provided with a booster pump (for cryogenic fluid) or a booster device (for cryogenic fluid) will be described with reference to FIG.
- the cryogenic fluid storage tank 8 is composed of a booster pump 81 (for cryogenic fluid) or a booster 82 (for cryogenic fluid), a cryogenic container 83 having an adiabatic vacuum tank 83a therein, and a low temperature fluid storage tank.
- 84 and heater 85 are the main elements.
- the booster pump 81 or the booster 82 boosts the low-temperature fluid to a desired pressure.
- the booster pump 81 for example, any of the above-described booster pumps (for low-temperature fluid) 1, 2, 3, 4, 5
- the above-described booster 6 for low-temperature fluid
- the booster 82 for low-temperature fluid
- the cryogenic vessel 83 is evacuated inside, and on its inner surface, for example, radiation such as a copper plate.
- the above-described booster pump 81 or booster 82 and the later-described cryogenic fluid storage tank 84 are accommodated in the adiabatic vacuum tank 83a of the cryogenic vessel 83.
- the cryogenic fluid storage layer 84 has a low temperature (for example, 260 ° C.) slush fluid (for example, slush hydrogen: solid hydrogen and liquid hydrogen mixed in a sherbet shape), and compared to liquid hydrogen.
- the low-temperature fluid stored in the interior is stored in the booster pump 81 or the booster device 82 through the pipe 87. ! /
- the slush hydrogen is produced by a slush hydrogen production device (not shown) installed in the cryogenic fluid storage layer 84, or the cryogenic container 83.
- the slush hydrogen production facility 88 which is prepared separately, is manufactured.
- a mesh (screen) 89 is provided inside the pipe 86.
- the mesh 89 is configured to pass only a liquid cryogenic fluid (for example, liquid hydrogen) (that is, for example, not to pass solid hydrogen), and thereby the booster pump located on the downstream side. Only the liquid low-temperature fluid is supplied to 81 or the booster 82, so that the booster pump 81 or the booster 82 is prevented from being clogged.
- a liquid cryogenic fluid for example, liquid hydrogen
- the heater 85 changes (melts) a solid cryogenic fluid (for example, solid hydrogen) into a liquid cryogenic fluid (for example, liquid hydrogen).
- a solid cryogenic fluid for example, solid hydrogen
- a liquid cryogenic fluid for example, liquid hydrogen
- the heat exchanger 75 as described above is provided on the downstream side of the booster pump 81 or the booster 82 and inside the cryogenic vessel 83 (or outside the cryogenic vessel 83).
- the slush-like cryogenic fluid is stored in the cryogenic fluid storage layer 84, so that only the liquid cryogenic fluid is stored.
- the suction performance of the booster pump 81 or the booster 82 which is difficult to evaporate is improved, and the supply amount of the low temperature fluid can be increased.
- the force described for the two-stage compression using two pumps is not limited to this. This can be achieved by three-stage compression using a pump, or more than that and multi-stage compression using a number of pumps.
- such multistage compression can be performed in a single pump that does not necessarily require a plurality of pumps.
- the booster pump according to the present invention can be used to pressurize fluids having various temperatures from room temperature fluids to high temperature fluids that cannot be used to boost only low temperature fluids. .
- the piston rod of the booster pump has a heat insulating vacuum structure that is hollow and evacuated.
- the piston rod has a hollow structure, the weight of the piston rod can be reduced, and the piston can be pushed up with a low load.
- the piston rod force can also reduce the entry of heat into the fluid.
- a booster pump 101 for low-temperature fluid is configured with a drive unit 111 and a pump unit 112 driven by the drive unit 111 as main elements.
- the drive unit 111 includes a rod 115 and a power transmission unit 116 that transmits power of a driving source (not shown) such as an electric motor or an engine to the rod 115.
- a driving source not shown
- the rod 115 is a substantially rod-like member having a circular shape in cross-section and extending downward from the lower end surface of the power transmission unit 116, and a heat insulating connection portion 128 is provided at the lower end portion.
- the power transmission unit 116 linearly reciprocates the rod 115 up and down (in the direction of the arrow in FIG. 11) with a stroke of 2 mm, for example, by power from a drive source (not shown).
- the pump unit 112 includes a piston 121, a piston rod 122, and a cylinder block 123.
- the piston 121 includes one piston main body 124 and one or more (four in this embodiment) piston heads 125, and a cylinder formed inside the cylinder block 123. It is housed in DA 126 so as to be able to reciprocate.
- the piston body 124 is a member having a substantially disk shape. One end of the piston rod 122 is connected to the center of the piston body 124, and the lower end surface of each piston head 125 and the upper surface of the piston body 124 are connected to the outer periphery thereof. Four rods 127 are provided for connecting the end faces to each other.
- each piston head 125 is a substantially disk-shaped member, and one end surface (the upper end surface in FIG. 11) of the piston head 125 is a low-temperature fluid (for example, liquid hydrogen, liquid nitrogen, liquid carbon dioxide gas, liquid natural gas). Gas, liquid propane gas, etc. can be compressed.
- a low-temperature fluid for example, liquid hydrogen, liquid nitrogen, liquid carbon dioxide gas, liquid natural gas. Gas, liquid propane gas, etc. can be compressed.
- the piston rod 122 is a substantially rod-like member having a circular shape in cross section, and one end thereof is coupled to the upper end surface of the piston main body 124 as described above, and the other end thereof is thermally insulated. It is connected to the tip of the rod 115 (the lower end in FIG. 11) via the part 128.
- the heat insulation connecting portion 128 includes a tip portion 128a of a rod 115 having the same shape as the inner race of the rolling bearing, a second end portion 128b of the piston rod 122 having the same shape as the outer race of the rolling bearing, and the rod 115. And a plurality of (four in this embodiment) rolling elements (for example, balls and rollers) 128c disposed between the front end portion 128a and the other end portion 128b of the screw rod 122.
- rolling elements for example, balls and rollers
- the tip end portion 128a of the rod 115 and the other end portion 128b of the piston rod 122 are connected to the piston rod 122 by a point contact or a line contact via the force rolling element 128c.
- the heat transfer (heat input) is greatly cut off.
- the piston rod 122 since the piston rod 122 is designed to be as long as possible, even if heat is transferred from the rod 115 to the piston rod 122 (heat input), the piston rod 122 can be used. Heat transfer (heat input) from the piston to the piston body 124 is minimized.
- a through hole 123a through which the rod 115 penetrates is formed in the central portion of the top of the cylinder block 123.
- the inside of the top of the cylinder block 123 communicates with the through hole 123a and has a heat insulating connection.
- An internal space 129 for accommodating 128 is formed.
- inside the cylinder block 123 positioned below the internal space 129 there is a cylinder 126 force communicating with the internal space 129 through a through hole 123b through which the piston rod 122 penetrates in the longitudinal direction (vertical direction in FIG. 11). It is drilled along.
- One end side (the upper side in FIG. 11) of the cylinder 126 is a pressurizing chamber 126a having an inner diameter larger than the outer diameter of the piston head 125, and the piston head 125 is accommodated in the pressurizing chamber 126a. It has become.
- the inside of the side wall, the inside of the bottom surface, and the inside of the top surface of the cylinder block 123 have a heat insulating vacuum structure that is hollow and evacuated as indicated by reference numeral 123c.
- suction is connected to each pressurizing chamber 126a.
- a port 123d and a discharge port 123e are provided.
- Each of the suction port 123d and the discharge port 123e is provided with a ball-type check valve 130 so that low-temperature fluid suction and discharge are controlled.
- Each suction port 123d is provided so as to communicate with a fluid suction passage 131 bored in the cylinder block 123, while each discharge port 123e communicates with a fluid discharge passage 132 bored in the cylinder block 123. Is provided.
- the low-temperature fluid guided from the fluid suction path 131 through the suction port 123d into the pressurizing chamber 126a is compressed by one end face of the piston head 125 and, for example, pressurized (pressurized) to 30 MPa,
- the discharge port 123e is led out of the cylinder block 123 through the fluid discharge path 132.
- the low-temperature fluid guided to the outside of the cylinder block 123 through the fluid discharge path 132 is stored (stored) in the chamber 134 through the pipe 133.
- the low-temperature fluid stored in the chamber 134 is guided to the heat exchanger 136 through the pipe 135 and gasified, and most of the low-temperature fluid is supplied to a fuel injection device (not shown) through the pipe 137.
- a part of the piston body 124 is located inside the cylinder 126 (on the other end of the cylinder 126, that is, on the side opposite to the pressurizing chamber 126a) via a pipe 138 and a pressure regulator (decompressor) 139.
- a low-temperature fluid whose pressure has been increased to 30 MPa is stored. Yes.
- the cylinder 126 is supplied with a gasified low temperature fluid of, for example, 15 MPa, which has been depressurized by the pressure regulator 139.
- Bellows (partition members) 140 are provided in the pressure chambers 126a, respectively.
- the bellows 140 includes an inner peripheral side (radially inner side) and an outer peripheral side (radially outer side) of the pressurizing chamber 126a located above the piston head 125 (the side opposite to the piston main body 124).
- One end of the piston head 125 is attached to the outer peripheral end portion of the piston head 125, and the other end is a cylinder block 123 positioned radially outside the suction port 123d and the discharge port 123e. It is attached to the inner wall surface.
- a bellows (partition member) 141 is also provided on the radially outer side of one end of the piston rod 122.
- the bellows 141 is divided (separated) into an inner peripheral side (piston rod 122 side) and an outer peripheral side (cylinder block 123 side) at one end of the piston rod 122, and one end of the bellows 141 is
- the piston body 124 is attached to the upper end surface, and the other end is attached to the inner wall surface of the cylinder block 123.
- Each of these bellows 140, 141 is made of, for example, stainless steel or Inconel, which is stretchable at (very) low temperatures.
- reference numerals 142, 143, and 144 in FIG. 11 are annular (thermal insulating) seal members in plan view, respectively.
- FIG. 12 is a cross-sectional view taken along line XII in FIG.
- the booster pump 101 for low-temperature fluid there is no portion that moves in contact with the inner peripheral surface of the pressurizing chamber 126a (for example, a conventional piston ring). 12 6a It is possible to prevent heat generation in 6a and to heat the low temperature fluid. Can be prevented.
- the inner peripheral side force of the pressurizing chamber 126a is also increased. It is possible to prevent low temperature fluid leakage (leak) from the outer peripheral side of a (or from the outer peripheral side of the pressurizing chamber 126a to the inner peripheral side of the pressurizing chamber 126a). Can be improved.
- the deformation of the bellows 140 when compressing the low temperature fluid sucked into the bellows 140 can be reduced, the life of the bellows 140 can be extended, and the booster pump 101 for low temperature fluid Reliability can be improved.
- the inner space of the bellows 140 formed by the inner peripheral surface of the bellows 140, one end surface of the piston head 125, and the upper surface of the pressurizing chamber 126a. Since the low-temperature fluid is compressed in the space), the length of the rod 127 connecting the piston head 125 and the piston body 124 can be shortened. As a result, the length of the pump section 112 in the longitudinal direction (axial direction) can be shortened, and the length of the entire pump in the longitudinal direction (axial direction) can be shortened. In addition, light weight can be achieved.
- the piston rod 122 is pulled toward the drive unit 111 (upward in FIG. 11), so that the low-temperature fluid is compressed by one end surface of the piston head 125. That is, when compressing the low temperature fluid, the compression force is not applied to the piston rod 122.
- the diameter of the piston rod 122 can be made smaller than that of the conventional piston rod where compression force is applied to the piston rod, so that heat input can be reduced and the weight of the piston rod 122 can be reduced. This makes it possible to reduce the overall weight of the pump.
- the heat input from the rod 115 to the piston rod 122 is reduced by the heat insulation connecting portion 128. It is possible to reduce the heat input, and the heat input can be further reduced.
- a piston main body 124 is provided between the piston rod 122 and the piston head 125, and heat from the piston rod 122 reaches the piston head 125 after passing through the piston main body 124. The amount of heat input can be further reduced. Furthermore, since the rod 115 connected to the power transmission unit 116 extends on the same side as the side where the suction port 123d and the discharge port 123e are arranged (upper side in FIG. 11), the longitudinal direction of the pump unit 112 ( The length in the axial direction can be shortened, and the length in the longitudinal direction (axial direction) of the entire pump can be shortened, so that the pump can be reduced in size and weight.
- a seventh embodiment of the booster pump for low temperature fluid according to the present invention will be described with reference to FIG.
- the booster pump 202 for low-temperature fluid is a so-called swash plate type (some! / Is a swash type), and includes a drive unit 261 and a pump unit 262 driven by the drive unit 261. Is the main element.
- the drive unit 261 includes a rod 265 and a power transmission unit 266 that transmits power from a driving source (not shown) such as an electric motor or an engine to the rod 265.
- a driving source not shown
- a driving source such as an electric motor or an engine
- the rod 265 is a substantially bar-shaped member that extends downward from the lower end surface of the power transmission unit 266 and has a circular shape in cross section.
- the power transmission unit 266 rotates the rod 265 in one direction (the direction of the arrow in FIG. 13) by power from a drive source (not shown).
- the pump unit 262 includes one or more (four in this embodiment) pistons 271 and a swash plate.
- Each piston 271 has a piston head 271a at one end and a piston shaft 271b at the other end, and is a substantially rod-like member having a circular shape in cross section, and is accommodated in a cylinder 276 so as to be able to reciprocate.
- the piston head 271a is a so-called enlarged portion having an outer diameter larger than the outer diameter of the piston rod 271c that connects the piston head 271a and the piston shoe 271b.
- Cold fluid eg liquid
- liquefied propane gas, etc. are compressed.
- the piston shaft 271b is a so-called expanded portion having an outer diameter larger than the outer diameter of the piston rod 271c, and its end surface (the lower surface in FIG. 13) It is configured to slide along the sliding surface P of the swash plate 272 having an inclination angle.
- the cylinder block 273 has pressurizing chambers 126a bored along the longitudinal direction (vertical direction in FIG. 13) by the same number as the number of pistons 271 inside. Each piston head 271a is housed in 126a.
- a through hole 123a through which the rod 265 passes is formed at the center of the cylinder block 273, and the inside of the side wall, the inside of the bottom surface, and the inside of the top surface of the cylinder block 123 are respectively denoted by reference numeral 123c. It is a heat-insulating vacuum structure that is hollow and evacuated.
- a suction port 123d and a discharge port 123e communicating with each pressurizing chamber 126a are respectively provided in the top portion of the cylinder block 273 and at a position facing the central portion on one end surface side of the piston head 271a. Is provided.
- Each of the suction port 123d and the discharge port 123e is provided with a ball-type check valve 130 to control the suction and discharge of the low temperature fluid.
- Each suction port 123d is provided so as to communicate with a fluid suction passage 131 bored in the cylinder block 123, while each discharge port 123e communicates with a fluid discharge passage 132 bored in the cylinder block 123.
- the low-temperature fluid guided from the fluid suction passage 131 through the suction port 123d into the calo pressure chamber 126a is compressed by one end surface of the piston head 271a and, for example, pressurized (pressurized) to 30 MPa.
- the discharge port 123e is led out of the cylinder block 273 through the fluid discharge path 132.
- the low-temperature fluid guided to the outside of the cylinder block 273 through the fluid discharge path 132 is stored (stored) in the chamber 134 through the pipe 133.
- the accumulated low-temperature fluid is guided to the heat exchanger 136 through the pipe 135 and gasified, and then most of the low-temperature fluid is supplied to a fuel injection device (not shown) through the pipe 137.
- a fuel injection device not shown
- a part of which is led to the inside of the pressurizing chamber 126a (that is, the space on the other end side of the piston head 27 la located on the opposite side of the bellows 140) through the pipe 138 and the pressure regulator 139. It becomes like this.
- a low-temperature fluid whose pressure has been increased to 30 MPa is stored.
- the pressurized chamber 126a is supplied with a gasified low-temperature fluid, for example, 15 MPa, decompressed by the pressure regulator 139.
- Bellows (partition members) 140 are provided in the pressure chambers 126a, respectively.
- the bellows 140 includes an inner peripheral side (radially inner side) and an outer peripheral side (radially outer side) of the pressurizing chamber 126a located above the piston head 271a (the side opposite to the piston rod 271c).
- One end is attached to the outer peripheral end of one end surface of the piston head 271a, and the other end is a cylinder block 273 located radially outside the suction port 123d and the discharge port 123e. It is attached to the wall.
- a bellows (partition member) 280 is also provided on the radially outer side of one end of the piston rod 271c.
- the bellows 280 is divided (separated) into an inner peripheral side (piston rod 271c side) and an outer peripheral side (cylinder block 273 side) at one end of the piston rod 271c.
- the piston bush 271b is attached to the outer peripheral end of the other end surface (the upper surface in FIG. 13), and the other end is attached to the inner wall surface of the cylinder block 273.
- Each of these bellows 140, 280 is made of, for example, stainless steel or Inconel, which is stretchable at (very) low temperatures.
- reference numerals 142, 143, and 144 are annular (thermal insulating) seal members in plan view, and reference numerals 281 and 282 are thrust roller bearings.
- the piston shaft 271b slides along the sliding surface P via the thrust bearing 281 and the piston 271 is The reciprocating motion within 276 caused the low flow into the pressurization chamber 126a.
- the warm fluid is successively compressed.
- the stroke of the piston 27 1 is set to 2 mm, for example.
- the pressurizing pump 202 for low-temperature fluid there is no portion that moves in contact with the inner peripheral surface of the pressurizing chamber 126a (for example, a conventional piston ring).
- the pressurizing chamber 126a for example, a conventional piston ring.
- the inner peripheral side force of the pressurizing chamber 126a is also increased. It is possible to prevent the leakage of the low temperature fluid from the outer circumference side of a (or the outer circumference side of the pressurization chamber 126a to the inner circumference side of the pressurization chamber 126a). Can be improved.
- the deformation of the bellows 140 when compressing the low temperature fluid sucked into the bellows 140 can be reduced, the life of the bellows 140 can be extended, and the booster pump 202 for low temperature fluid Reliability can be improved.
- the booster pump 202 for low-temperature fluid according to the present embodiment, the inner space of the bellows 140 (formed by the inner peripheral surface of the bellows 140, one end surface of the piston head 271a, and the upper surface of the pressurizing chamber 126a. Since the low temperature fluid is compressed in the space), the length of the piston rod 271c connecting the piston head 271a and the piston shoe 271b can be shortened. As a result, the length of the pump unit 262 in the longitudinal direction (axial direction) can be shortened, and the length of the entire pump in the longitudinal direction (axial direction) can be shortened. ⁇ ⁇ can be planned.
- the rod 265 when the rod 265 is rotated in the negative direction (the direction of the arrow in FIG. 13), the low temperature fluid is compressed by one end surface of the piston head 271a. That is, the compression force is not applied to the rod 265 when compressing the low temperature fluid.
- the diameter of the rod 265 can be made smaller than that of the conventional piston rod type in which compression force is applied to the rod, so that heat input from the drive source can be reduced and the rod 265 can be reduced in weight. Can be achieved, and the overall weight of the pump can be reduced.
- the rod 265 connected to the power transmission unit 266 extends on the same side as the side where the suction port 123d and the discharge port 123e are arranged (upper side in FIG. 13), the longitudinal direction of the pump unit 262 ( The length in the axial direction can be shortened, and the length in the longitudinal direction (axial direction) of the entire pump can be shortened, so that the pump can be reduced in size and weight.
- the force described for a four-cylinder cylinder having four pistons and four cylinders is provided.
- the present invention is not limited to this, for example, a single cylinder, two-cylinder, three-cylinder, etc. It is also possible to adopt a configuration with more than five cylinders.
- the thrust roller bearing 282 described in the seventh embodiment is not limited to the one that supports the central portion of the lower surface of the swash plate 272 as shown in FIG. It is possible to support the whole with a plurality of thrust roller bearings arranged in the circumferential direction.
- the angle of the swash plate 272 is configured to be changeable by using an actuator or the like, that is, configured to be a variable capacity type. This makes it possible to change the discharge amount of the pump only by changing the angle of the swash plate 272 without changing the drive rotational speed of the pump.
- the force in which the ball type check knob 130 is provided in each of the suction port 123d and the discharge port 123e is not limited to this, and the internal combustion engine
- the internal combustion engine For example, it can be a forced drive type as seen in DOHC, or it can be a reed valve, a poppet valve or the like.
- the low temperature fluid gasified by the heat exchange 136 is supplied to the outside of the bellows 140, 280.
- the present invention is not limited to this, and the space in which the gasified cryogenic fluid was supplied can be in a vacuum state.
- the space between the bellows 140, 280 and the cylinder block 123, 273 is a vacuum
- the heat of the inner flange J of the bellows 140, 280 (that is, the heat of the low-temperature fluid compressed inside the bellows 140, 280) is prevented from being transmitted to the cylinder blocks 123, 273.
- the piston body and piston head are forced to reciprocate within the cylinder and do not collide with the inner wall surface (cylinder wall) of the cylinder.
- a guide member is provided between the piston rod 122 and the cylinder block 123 or between the connecting member 124 and the cylinder 126.
- Examples of the guide member include a linear bearing disposed between the piston rod 122 and the cylinder block 123, an outer peripheral surface of the connecting member 124, and an inner wall surface of the cylinder 126, and a lower end surface of the connecting member 124.
- a cylindrical protruding force projecting downward Cylinders that are guided in a cylindrical recess (dent) formed at the center of the bottom surface of the cylinder 126 can be mentioned.
- the reciprocating member force of the piston main body, the piston head, etc. reciprocates without shaking or vibrating, and the reciprocating member can be prevented from colliding with the inner wall surface of the cylinder. At the same time, the reciprocating member can be driven smoothly with minimal power.
- the pipe 138 and the pressure regulator 139 shown in FIG. 11 and FIG. 13 are omitted.
- a space in which the inside of the piston rod 122 and the cylinder block 123 is evacuated is formed.
- the inner peripheral space and the outer peripheral space of the piston rod 122 are separated between the lower surface of the other end portion 128b of the piston rod 122 and the upper surface of the bottom portion of the internal space 129 shown in FIG. Bellows (similar to 141) are provided.
- the space between the cylinder block 123 and the piston rod 122 is in a vacuum state, and the heat from the piston rod 122 (that is, the heat generated by the drive unit 111 side also enters the piston rod 122 side). ) Is prevented from being transmitted.
- the cryogenic fluid booster pump 301 is configured with a drive unit 311 and a pump unit 312 driven by the drive unit 311 as main elements.
- the drive unit 311 includes a cam 313, a reciprocating unit 314, a linear bearing 315, a biasing member 316, and a casing 317 for housing these elements.
- the cam 313 is an arc cam (convex cam) having a maximum lift (maximum lift) of, for example, 2 mm, which is fixed to a drive shaft 318 of a drive source (not shown) (for example, an electric motor or an engine). When driven, it rotates in one direction together with a drive shaft 318 that rotates.
- a drive source for example, an electric motor or an engine
- the reciprocating part 314 is a substantially cylindrical member in which an internal space is formed.
- the reciprocating part 314 has a rolling bearing (bearing) 319 in the internal space and is directed downward from the lower end surface thereof.
- An approximately rod-shaped rod 320 having a circular cross-sectional view is extended.
- the rolling bearing 319 includes an inner race (inner ring) 319a, an outer race (outer ring) 319b, and a plurality of rolling elements (for example, balls and rollers) disposed between the inner race 319a and the outer race 319b. It has.
- the inner race 319a is attached to a shaft 314a projecting in the internal space of the forward / reverse moving portion 314, and the outer race 319a
- the outer surface of 319b rotates together with the cam 313 by making line contact with the outer surface of the rotating cam 313.
- the linear bearing 315 guides the radially outer peripheral surface of the reciprocating part 314 so that the reciprocating part 314 linearly reciprocates in the vertical direction. It is attached to the side inner wall of the casing 317 at the outer side in the direction.
- a plurality of rolling elements (for example, balls and rollers) 315a are arranged inside the linear bearing 315, so that the reciprocating motion of the reciprocating portion 314 in the vertical direction is smooth (smooth). It is supposed to be done.
- Examples of the material of the linear bearing 315 include resin, titanium, ceramic, and the like.
- the urging member 316 is attached to the upper inner wall surface of the casing 317, and is disposed on the upper side of the forward / backward moving portion 314 to urge the reciprocating portion 314 downward, that is, the outer race 319b of the rolling bearing 319.
- the outer surface of the cam 313 is biased toward the outer surface of the cam 313, for example, a compression panel.
- the casing 317 is a substantially cylindrical member in which an internal space for accommodating the cam 313, the reciprocating part 314, the linear bearing 315, and the biasing member 316 is formed.
- the casing 317 is disposed above the pump part 312. Has been placed.
- the pump unit 312 includes a piston 321, a piston rod 322, and a cylinder block 323.
- the piston 321 includes a piston main body 324 and a piston head 325, and is accommodated in a cylinder 326 formed inside the cylinder block 323 so as to be able to reciprocate.
- the piston main body 324 is a bottomed hollow member having a generally cup shape.
- a piston head 325 is disposed at one end (the upper end in FIG. 14) and the other end (bottom) is at the center.
- a through hole 324a through which one end of the piston rod 322 passes is formed in
- one end of the piston rod 322 is attached via a heat insulating material 327.
- the inside of the side wall of the piston main body 324 has a heat-insulating vacuum structure that is hollow and evacuated as indicated by reference numeral 324b.
- the piston head 325 is a member having an annular shape (doughnut shape) in plan view, in which a through-hole 325a through which a piston rod 322 and a partition wall 334, which will be described later, are formed, is formed at one end surface (in FIG. 14).
- the low temperature fluid for example, liquid hydrogen, liquid nitrogen, liquefied carbon dioxide, liquefied natural gas, liquid propane gas, etc.
- the low temperature fluid for example, liquid hydrogen, liquid nitrogen, liquefied carbon dioxide, liquefied natural gas, liquid propane gas, etc.
- the piston rod 322 is a substantially rod-like member having a circular shape in cross section, and one end thereof is attached to the center of the other end of the piston main body 324 via the heat insulating material 327 as described above.
- the other end portion is connected to the tip end portion of the rod 320 (the lower end portion in FIG. 14) through the heat insulating connecting portion 328.
- the heat insulation connecting portion 328 includes a tip 328a of a rod 320 having a shape similar to the inner race of the rolling bearing, a piston rod 322 having the same shape as an outer race of the rolling bearing, a rod 322b of the other end, and the rod 320. And a plurality of (four in this embodiment) rolling elements (for example, balls and rollers) 328c disposed between the tip end rod 328a and the other end 328b of the piston rod 322.
- rolling elements for example, balls and rollers
- the tip 320 of the rod 320 and the other end 328b of the piston rod 322 and the force rolling element 328c are connected by point contact or line contact, so that the rod 320 force piston rod 322 Heat transfer (heat input) to is greatly cut off.
- one end of the piston rod 322 and the center of the other end of the piston body 324 are connected via a heat insulating material 327! /, So the temporary rod rod 320 force piston rod Even if there is heat transfer (heat input) to 322, heat transfer (heat input) from the piston rod 322 to the piston body 324 is blocked by the heat insulating material 327.
- a through hole 323a through which the rod 320 passes is formed at the center of the top of the cylinder block 323, and the inside of the top of the cylinder block 323 communicates with the through hole 323a and also has a heat insulating connection.
- An internal space 329 for accommodating 328 is formed.
- the cylinder block 323 located below the internal space 329 has a piston A cylinder 326 communicating with the internal space 329 through a through hole 323b through which the rod 322 passes is drilled along the longitudinal direction (vertical direction in FIG. 14).
- One end side (the upper side in FIG. 14) of the cylinder 326 is a pressurizing chamber 326a having an inner diameter larger than the outer diameter of the piston head 325, and the piston head 325 is accommodated in the pressurizing chamber 326a. It has become.
- the inside of the side wall, the inside of the bottom surface, and the inside of the top surface of the cylinder block 323 have a heat insulating vacuum structure that is hollow and evacuated as indicated by reference numeral 323c.
- the pressurizing chamber 326a is connected inside the cylinder block 323 located between the pressurizing chamber 326a and the internal space 329, and at a position facing the one end surface side peripheral end of the piston head 325.
- a suction port 323d and a discharge port 323e are provided inside the cylinder block 323 located between the pressurizing chamber 326a and the internal space 329, and at a position facing the one end surface side peripheral end of the piston head 325.
- a suction port 323d and a discharge port 323e are provided inside the cylinder block 323 located between the pressurizing chamber 326a and the internal space 329, and at a position facing the one end surface side peripheral end of the piston head 325.
- a suction port 323d and a discharge port 323e are provided inside the cylinder block 323 located between the pressurizing chamber 326a and the internal space 329, and at a position facing the one end surface side peripheral end of the piston head 325.
- the suction port 323d is provided in communication with the fluid suction path 331 drilled in the cylinder block 323, while the discharge port 323e is provided in communication with the fluid discharge path 332 drilled in the cylinder block 323. Yes. Therefore, the low-temperature fluid introduced into the pressurizing chamber 326a from the fluid suction path 331 through the suction port 323d is compressed by one end surface of the piston head 325 and, for example, pressurized (pressurized) to 30 MPa and then discharged. It is led out of the cylinder block 323 through the fluid discharge path 332 from the port 323e. The low-temperature fluid led out of the cylinder block 323 through the fluid discharge path 332 is stored in the chamber C through the pipe 333 and then supplied to a fuel injection device (not shown) through the pipe 335. It ’s like that!
- a low-temperature fluid whose pressure is increased to 30 MPa is stored.
- a partition 334 is provided between the piston rod 322 and the piston 321 so as to cover the outer surface of the shaft portion of the piston rod 322.
- the inside of the partition wall 334 has a heat-insulating vacuum structure that is hollow and evacuated as indicated by reference numeral 334a. Is prevented from being transmitted to the piston 321.
- a bellows (partition member) 336 is provided in the pressurizing chamber 326a.
- the bellows 336 includes an inner peripheral side (piston 321 side) and an outer peripheral side (cylinder block 323) of a pressurizing chamber 326a positioned on the piston body 324 side (lower side in FIG. 14) with respect to the piston head 325.
- One end of which is attached to the surface opposite to the one end surface of the piston head 325 (the other end surface), and the other end is attached to the inner wall surface of the cylinder block 323. ing.
- a bellows (partition member) 337 is also provided on the radially outer side of the partition wall 334, which is located above one end surface of the piston head 325.
- the bellows 337 partitions (separates) the upper side of the cylinder 326 into an inner peripheral side (piston rod 322 side) and an outer peripheral side (cylinder block 323 side). The other end is attached to the inner wall surface of the cylinder block 323.
- Each of these bellows 336, 337 is made of, for example, stainless steel or Inconel, which is stretchable at (very) low temperatures.
- FIG. 15 is a cross-sectional view taken along the arrow XV—XV in FIG. 14.
- the imaginary line (two-dot chain line) in FIG. 15 indicates the bellows 337.
- reference numerals 338, 339, 340, and 341 in FIG. 14 are respectively sealing members that are annular (for heat insulation) in plan view.
- the piston rod 322 is pulled toward the drive unit 311 (upward in FIG. 14), whereby the cryogenic fluid is compressed by one end surface of the piston head 325. It has become so. That is, when compressing the low-temperature fluid, the piston rod 322 is compressed from the force.
- the diameter of the piston rod 322 can be made smaller than that of the conventional piston rod in which the compression force is applied to the piston rod (for example, when the piston rod 322 is made of Inconel, the diameter of the piston rod 322 is 8mm), the heat input from the driving source can be reduced, the weight of the piston rod 322 can be reduced, and the overall weight of the pump can be reduced.
- the diameter of the piston head 325 can be increased (for example, a diameter of 10 Omm). can do). That is, in the conventional pump in which the compression force is applied to the piston rod, the radial force of the piston head is limited to, for example, a diameter of 40 mm in order to avoid buckling of the piston rod. Therefore, in the conventional pump, for example, the force required for five cylinders to secure the flow rate of the low-temperature fluid. In the pump of the present invention, the diameter of the piston head 325 can be set to, for example, 100 mm in diameter. Even with a single cylinder, a sufficient flow rate can be secured!
- the pump of this invention while being able to simplify the structure of a pump, the light weight key and small diameter key of the whole pump can be aimed at.
- the heat input from the rod 320 to the piston rod 322 can be reduced by the heat insulation connecting portion 328, and the heat input of the driving source can be further reduced.
- a piston body 324 is provided between the piston rod 322 and the piston head 325, so that heat from the piston rod 322 reaches the piston head 325 after passing through the piston body 324.
- the amount of heat input can be further reduced.
- the piston main body 324 has a hollow and vacuum-insulated adiabatic vacuum structure, the amount of heat input can be further reduced.
- the amount of heat input to the piston head 325 can be reduced, and the piston head Gasification (boil-off) of the low-temperature fluid compressed by one end face of 325 can be reduced.
- cryogenic fluid booster pump 301 there is no portion that moves in contact with the inner peripheral surface of the pressurizing chamber 326a (for example, a conventional piston ring). Heat generation in the pressure chamber 326a can be prevented, and the low temperature fluid can be prevented from being heated.
- the booster pump 402 for low-temperature fluid differs from that of the eighth embodiment described above in that a piston head 325 is directly attached to one end of a piston rod 322. Since other components are the same as those of the above-described embodiment, description of these components is omitted here.
- the length of the piston port 322 is about 1/4 of that of the eighth embodiment, and one end of the piston rod 322 is formed. Is directly attached to a through-hole 325b formed in the central portion of the piston head 325 via a heat insulating material 327. Therefore, in this embodiment, the piston body 324, the partition wall 334, and the cylinder 326 located below the bellows 336 in the eighth embodiment are omitted, and the longitudinal direction of the entire pump (in the drawing) The length in the vertical direction is getting shorter.
- the heat input from the drive source becomes a problem because the piston body 324 and the partition wall 334 are omitted.
- the cam 313 and the rolling bearing 319 are configured to be in line contact with each other, and the heat-insulating connection portion 328 causes the leading end portion 328a of the rod 320 and the other end portion 328b of the piston rod 322 to be in contact with each other.
- the heat input from the drive source hardly poses a problem.
- the length of the pump part 412 in the vertical direction can be significantly shortened. This makes it possible to reduce the length of the entire pump in the vertical direction, The pump can be downsized.
- a tenth embodiment of a cryogenic fluid booster pump according to the present invention will be described with reference to FIG.
- the pressurizing pump 503 for low-temperature fluid according to the present embodiment performs the first compression (first stage compression) on the outer peripheral side of the piston head 525, and the second compression (second stage compression) on the inner peripheral side of the piston head 525. ) Is different from that of the eighth embodiment described above. Since other components are the same as those of the above-described embodiment, description of these components is omitted here.
- the first compression is performed on the outer peripheral edge side of the piston head 525
- the second compression is performed on the inner peripheral edge side of the piston head 525.
- a drive unit 311 and a low pressure chamber 534 are provided in the cylinder block 523.
- the piston 521 in this embodiment includes a piston main body 524 and a piston head 525, and is accommodated in a cylinder 326 formed inside the cylinder block 523 so as to be able to reciprocate.
- Piston head 525 has a first compression surface 525a on one end face on the outer peripheral edge side (the upper end face in FIG. 17), and a second compression face 525b on one end face on the inner peripheral edge side.
- a low-temperature fluid for example, liquid hydrogen, liquid nitrogen, liquefied carbon dioxide, liquefied natural gas, liquefied propane gas, etc.
- the low-temperature fluid guided from the fluid suction passage 331 through the low-pressure side suction port P1 into the pressurizing chamber 326a is compressed by the first compression surface 525a of the piston head 525, for example, 5 MPa
- the first compression surface 525a of the piston head 525 for example, 5 MPa
- the low-temperature fluid stored in the low-pressure chamber 534 is guided from the low-pressure chamber 534 to the high-pressure side suction port P3 through the second communication path (the flow path connecting the low-pressure chamber 534 and the high-pressure side suction port P3). Then, it is guided into the pressurizing chamber 326a.
- the cryogenic fluid introduced into the pressurizing chamber 326a is compressed by the second compression surface 525b of the piston head 525, for example, 30
- After being pressurized (increased) to MPa it is led out of the cylinder block 523 through the fluid discharge path 332 from the discharge port P4 on the high pressure side.
- the low-temperature fluid led to the outside of the cylinder block 523 is stored in the chamber C via the pipe 333 and then supplied to the fuel injection device via the pipe 335. ! / Speak.
- the low temperature fluid is pressurized to, for example, 5 MPa by the first compression surface 525a of the piston head 525, and then the second fluid of the piston head 525 is increased. Further compression is performed by the compression surface 525b so that the cryogenic fluid is pressurized to a desired pressure (eg, 3 OMPa).
- a desired pressure eg, 3 OMPa
- the low temperature fluid is first pressurized to an intermediate pressure instead of increasing the pressure of the low temperature fluid from low pressure to high pressure, and then the low temperature fluid is pressurized to a desired pressure (high pressure).
- Adopt compression is first pressurized to an intermediate pressure instead of increasing the pressure of the low temperature fluid from low pressure to high pressure, and then the low temperature fluid is pressurized to a desired pressure (high pressure).
- the stroke of the piston 521 (that is, the maximum lift of the cam 313) can be reduced, so that the longitudinal length of the pump 512 can be further shortened, and the longitudinal length of the entire pump can be reduced. This can be further shortened, and the pump can be further miniaturized.
- the expansion / contraction rate of the bellows 336, 337 can be reduced (that is, the expansion / contraction range can be reduced), so the life of these bellows 336, 337 can be reduced.
- the other operational effects that can be extended and improve the reliability of the pump are the same as the operational effects of the above-described eighth embodiment, so that the description thereof is omitted here.
- a cryogenic fluid booster pump 604 according to this embodiment is provided with heat insulation of a cylinder block 623 constituting a pump unit 612. This is different from the above-described eighth embodiment in that a precooling layer 630 is provided inside the vacuum structure 323c. Since other components are the same as those of the above-described embodiment, description of these components is omitted here. The same members as those in the eighth embodiment described above are denoted by the same reference numerals.
- a precooling layer 630 is provided inside the side wall, inside the bottom surface, and inside the top surface of the cylinder block 623.
- a coolant inlet pipe 631 and a coolant outlet pipe 632 are connected to the precooling layer 630, and the coolant (for example, liquid hydrogen, liquid nitrogen, liquefied liquid) supplied from the coolant inlet pipe 631 into the precooling layer 630 is connected to the precooling layer 630.
- Low-temperature fluid such as carbon dioxide, liquefied natural gas, and liquefied propane gas
- the entire pump can be sufficiently cooled before the pump is started, so the low-temperature fluid supplied to the low-temperature fluid booster pump 604 is gasified (boil-off). Can be reduced.
- the pre-cooling layer 630 functions as a heat insulating layer even during the pump operation, the gasification (boil-off) of the low-temperature fluid can be reduced even during the pump operation.
- a twelfth embodiment of a cryogenic fluid booster pump according to the present invention will be described with reference to FIG. 19.
- a cryogenic fluid booster pump 705 according to this embodiment is provided with bellows 737 instead of bellows 337. This is different from that of the eleventh embodiment described above. Since the other components are the same as those of the above-described embodiment, description of these components is omitted here.
- the bellows (cutting member) 737 of the booster pump 705 for cryogenic fluid is located closer to the piston body 324 side (lower side in FIG. 19) than the piston head 325.
- the pressurizing chamber 326a which is provided on the radially inner side of the bellows 336, one end thereof is attached to the surface opposite to the one end surface (the other end surface) of the piston head 325! /, And The other end is attached to the upper surface of the tongue of the partition wall 334.
- the bellows 737 is made of, for example, stainless steel or Inconel, which is stretchable at a (very) low temperature, like the bellows 336 and 337 described above.
- the length of the pump in the height direction is increased.
- the length can be shortened, and the size of the pump can be reduced.
- reference numeral 712 denotes a pump unit.
- a thirteenth embodiment of the booster pump for a low temperature fluid according to the present invention will be described with reference to FIG. 20.
- the booster pump for low temperature fluid 806 according to this embodiment is further provided with a bellows 837! This is different from the twelfth embodiment described above. Since other components are the same as those of the above-described embodiment, description of these components is omitted here.
- the cryogenic fluid booster pump 806 is provided with another bellows (partition member) 837 on the other end side (lower side in the figure) of the bellows 737.
- the bellows 837 has one end attached to the lower surface of the tongue portion of the partition wall 334 and the other end attached to the upper surface of the inner wall of the other end portion of the piston main body 324.
- the bellows 837 allows the space between the lower surface of the tongue of the partition wall 334 and the upper surface of the inner wall of the other end of the piston body 324 to be on the inner peripheral side (piston rod 322 side) and outer peripheral side (cylinder block 323 side). It becomes to be partitioned (separated)!
- the bellows 837 is made of, for example, stainless steel or Inconel, which has elasticity at a (very) low temperature, like the bellows 336, 337, and 737 described above.
- reference numeral 812 denotes a pump unit.
- a fourteenth embodiment of a cryogenic fluid booster pump according to the present invention will be described with reference to FIG. 21.
- a cryogenic fluid booster pump 907 according to this embodiment is provided with a pressurized fluid supply unit 930. This is different from the eighth embodiment described above. Since the other components are the same as those in the above-described embodiment, description of these components is omitted here.
- a pressurized fluid supply unit 930 is provided in the cryogenic fluid booster pump 907 according to the present embodiment.
- the pressurizing fluid supply unit 930 is provided inside the chamber C and inside the cylinder 326 (on the other end side of the cylinder 326, that is, on the side opposite to the pressurizing chamber 326a) And a pressure regulator (decompressor) 932 provided in the middle of the communication pipe 931.
- a low-temperature fluid of, for example, 15 MPa that has been decompressed by the pressure regulator 932 can be supplied to the inside of the cylinder 326.
- the difference between the pressure on the one end face (compression face) side and the pressure on the other end face side can be reduced, and a bellows with low pressure resistance can be used.
- reference numeral 912 denotes a pump unit.
- it can be a convex shape having one bulge on the radially outer side indicated by a solid line in FIG. 22, or a dent having a single dent on the radially inner side indicated by a two-dot chain line in FIG. It ’s the name of Chitose.
- heat insulation connecting portions 128, 328 are not limited to those described above, and may be as shown in FIG.
- the heat insulating material 428c is interposed, and these members are connected by fastening members J such as bolts and nuts, for example.
- a relief valve is provided in the above-described chamber C and low-pressure chamber 534, and the relief valve force is also ejected from the low-temperature fluid force return pipe, and the pump suction side (or a separate fuel cell is provided). It is more preferable that what is returned is returned to the fuel cell).
- a cryogenic fluid booster pump 1008 includes a drive unit 11 11 and The pump unit 1112 driven by the drive unit 1111 is a main element.
- the drive unit 1111 includes a rod 1115 and a power transmission unit 1116 that transmits power from a drive source (not shown) (for example, an electric motor or an engine) to the rod 1115.
- the rod 1115 is a substantially rod-like member having a circular shape in cross-section and extending downward from the lower end surface of the power transmission unit 1116, and a heat insulating connection portion 328 is provided at the lower end portion thereof.
- the power transmission unit 1116 linearly reciprocates the rod 1115 in the vertical direction (in the direction of the arrow in FIG. 24) with a stroke of 2 mm, for example, by power from a drive source (not shown).
- the pump rod 112 includes a piston 1121, a piston rod 1122, and a cylinder block 1123.
- the piston 1121 includes one connecting member 1124 and one or more (four in this embodiment) piston heads 1125, and can reciprocate in a cylinder 1126 formed inside the cylinder block 1123. Is housed in.
- the connecting member 1124 is a member having a substantially disk shape. One end of a piston rod 1122 is connected to the center of the connecting member 1124, and the lower end surface of each piston head 1125 and the connecting member 1124 are connected to the outer periphery thereof. Four rods 1127 that connect the upper end surfaces are provided. As shown in FIG. 25, these four rods 1127 are arranged at equal intervals (90 ° intervals).
- Each piston head 1125 is a member having a substantially disk shape, and one end surface (the upper end surface in FIG. 24) of the piston head 1125 is a low-temperature fluid (for example, liquid hydrogen, liquid nitrogen, liquid carbon dioxide gas, liquid natural gas). Gas, liquid propane gas, etc. can be compressed.
- a low-temperature fluid for example, liquid hydrogen, liquid nitrogen, liquid carbon dioxide gas, liquid natural gas. Gas, liquid propane gas, etc. can be compressed.
- the piston rod 1122 is a substantially rod-shaped member having a circular shape in cross section, and as described above, one end thereof is connected to the upper end surface of the connecting member 1124, and the other end is thermally connected. It is connected to the tip of rod 1115 (the lower end in FIG. 24) via part 328.
- the heat insulation connecting portion 328 includes a tip end portion 328a of a rod 11 15 having a shape similar to that of an inner race of a rolling bearing, a piston rod 1122 having a shape similar to that of an outer race of a rolling bearing, and a second end flange 328b of these
- the rod 1115 has a plurality of (four in this embodiment) rolling elements (for example, balls and rollers) 328c disposed between the tip end 328a of the rod 1115 and the other end 328b of the piston rod 1122. .
- the tip end portion 328a of the rod 1115 and the other end portion 328b of the piston rod 1122 are connected to each other by point contact or line contact via the force rolling element 328c.
- Heat transfer (heat input) from 15 to the piston rod 1122 is greatly cut off! /, And the piston rod 1122 is designed to be as long as possible Therefore, even if there is heat transfer (heat input) from the rod 1115 to the piston rod 1122, heat transfer (heat input) from the piston rod 1122 to the connecting member 1124 should be minimized. Yes.
- a through hole 323a through which the rod 1115 penetrates is formed at the central portion of the top of the cylinder block 1123, and the inside of the top of the cylinder block 1123 communicates with the through hole 323a and has a heat insulating connecting portion 328. Is formed.
- a cylinder 1126 communicating with the internal space 329 through a through hole 1123b through which the piston rod 1122 passes is provided in the longitudinal direction (vertical direction in FIG. 24).
- a caloric pressure chamber 1126a having an inner diameter larger than the outer diameter of the piston head 1125, and the piston head 1125 force S is accommodated in the caloric pressure chamber 1126a. It is like that.
- the inside of the side wall, the inside of the bottom surface, and the inside of the top surface of the cylinder block 1123 have a heat insulating vacuum structure that is hollow and evacuated as indicated by reference numeral 1 123c.
- each of the pressurizing chambers 1126a is located at the inside of the cylinder block 1123 located between the pressurizing chamber 1126a and the internal space 329 and at the position facing the central portion on one end surface side of the piston head 1125
- a suction port 1123d and a discharge port 1123e are provided to communicate with!
- Each of the suction port 1123d and the discharge port 1123e is provided with a ball-type check valve 1130, which controls the suction and discharge of the low-temperature fluid.
- Each suction port 1123d is provided in communication with a fluid suction path 1131 drilled in the cylinder block 1123, while each discharge port 1123e is provided in communication with a fluid discharge path 1132 drilled in the cylinder block 1123. It has been. Therefore, the low-temperature fluid guided to the pressurized chamber 1126a through the suction port 1123d also through the fluid suction path 1131d is compressed by one end face of the piston head 1125 and, for example, pressurized (pressurized) to 30 MPa. , Discharge port It is led out of the cylinder block 1123 through the fluid discharge path 1132 from the port 1123e.
- the low-temperature fluid led out of the cylinder block 1123 through the fluid discharge path 1132 is stored (stored) in the chamber 1134 through the pipe 1133.
- the low-temperature fluid stored in the chamber 1 134 is guided to the heat exchange ⁇ 1136 via the pipe 1135 and gasified, and most of the low-temperature fluid is supplied to the fuel injection device (not shown) via the pipe 1137.
- a part of which is located inside the cylinder 1126 via the piping 1138 and the pressure regulator 1139 (on the other end of the cylinder 1126, that is, on the side opposite to the pressurizing chamber 1126a, The space between the lower surface of the other end of the connecting member 1124 and the bottom surface of the cylinder 1126 is guided.
- a low-temperature fluid whose pressure has been increased to 30 MPa is stored.
- the cylinder 1126 is supplied with a gasified low temperature fluid of, for example, 15 MPa, which is decompressed by a pressure regulator 1139.
- a bellows (partition member) 1140 is provided in each pressurizing chamber 1126a.
- the bellows 1140 includes an inner peripheral side (rod 1127 side) and an outer peripheral side (cylinder block 1123 side) of the pressurizing chamber 1126a located on the connecting member 1124 side (lower side in FIG. 24) than the piston head 1125. And one end of the piston head 1125 is attached to the surface opposite to the one end surface (the other end surface), and the other end is attached to the inner wall surface of the cylinder block 1123. Yes.
- a bellows (partition member) 1141 is also provided on the radially outer side of one end of the piston rod 1122.
- the bellows 1141 is cut (separated) into an inner peripheral side (piston rod 1122 side) and an outer peripheral side (cylinder block 1123 side) at one end of the piston rod 1122.
- One end is attached to the upper end surface of the connecting member 1124, and the other end is attached to the inner wall surface of the cylinder block 1123.
- Each of these bellows 1140, 1141 is made of, for example, stainless steel or Inconel, which is stretchable at (very) low temperatures.
- FIG. 25 is a cross-sectional view taken along the line XXV-XXV in FIG.
- the piston rod 1122 is pulled toward the drive unit 1111 (upward in FIG. 24), whereby the cryogenic fluid is compressed by one end surface of the piston head 1125. It has come to be. That is, when compressing the low-temperature fluid, the compression force is not applied to the piston rod 1122.
- the diameter of the piston rod 1 122 can be made smaller than that of the conventional piston rod, which applies compressive force to the piston rod, so that heat input can be reduced and the weight of the piston rod 1122 can be reduced. It is possible to reduce the overall weight of the pump.
- the inner peripheral side force of the pressurizing chamber 1126a is also increased. Can prevent the leakage of low-temperature fluid from the outer peripheral side (or the outer peripheral side of the pressurizing chamber 1126a to the inner peripheral side of the pressurizing chamber 1126a) and improve the compression efficiency of the low-pressure fluid booster pump 1008 Can be made.
- the bellows 1140 Furthermore, on the outside (radially outside) of the bellows 1140, there is a low-temperature fluid that is gasified by heat exchange 1136 and whose pressure is adjusted to a predetermined pressure (for example, 15 MPa) by the pressure regulator 1139. Therefore, the deformation of the bellows 1140 when compressing the low-temperature fluid sucked into the bellows 1140 can be reduced, The lifetime of the bellows 1140 can be extended, and the reliability of the booster pump 1008 for low-temperature fluid can be improved.
- a predetermined pressure for example, 15 MPa
- the heat input from the rod 1115 to the piston rod 1122 can be reduced from the heat insulating connecting portion 328, so that the heat input can be further reduced.
- a connecting member 1124 is provided between the piston rod 1122 and the piston head 1125, and heat from the piston rod 1122 reaches the piston head 1125 after passing through the connecting member 1124. The amount of heat input can be further reduced.
- the rod 1115 connected to the power transmission unit 1116 extends on the same side as the side where the suction port 1123d and the discharge port 1123e are arranged (upper side in FIG. 24). The length in the longitudinal direction (axial direction) can be shortened, and the length in the longitudinal direction (axial direction) of the entire pump can be shortened, so that the pump can be made smaller and lighter. .
- the cryogenic fluid booster pump 2009 is a swash plate type (there is a swash)
- the driving unit 2161 and the pump unit 2162 driven by the driving unit 2161 are the main elements.
- the drive unit 2161 includes a rod 2165 and a power transmission unit 2166 that transmits power from a drive source (not shown) (for example, an electric motor or an engine) to the rod 2165.
- the rod 2165 is a substantially rod-like member having a circular shape in cross section and extending downward from the lower end surface of the power transmission unit 2166.
- the power transmission unit 2166 rotates the rod 2165 in one direction (the direction of the arrow in FIG. 26) by power from a drive source (not shown).
- the pump unit 2162 includes one or a plurality (four in this embodiment) of pistons 2171, a swash plate (also referred to as “yoke”) 2172, and a cylinder block 2173.
- Each piston 2171 is a substantially bar-shaped member having a circular shape in cross section, having a piston head 2171a at one end and a piston 2171b at the other end. Each can be reciprocated in 76!
- the piston head 2171a is a so-called enlarged portion having an outer diameter larger than the outer diameter of the piston rod 2171c that couples the piston head 2171a and the piston shoe 2171b.
- the upper end face (for example, liquid hydrogen, liquid nitrogen, liquefied carbon dioxide gas, liquefied natural gas, etc.) compresses liquefied propane gas and the like.
- the piston shoe 2171b is a so-called expanded portion having an outer diameter larger than the outer diameter of the piston rod 2171c, and its end surface (the lower surface in FIG. 26) is
- the swash plate 2172 having an inclination angle is configured to slide along the sliding surface P of the swash plate 2172.
- the cylinder block 2173 has pressurizing chambers 1126a bored in the longitudinal direction (vertical direction in FIG. 26) by the same number as the number of pistons 2171 inside.
- One piston head 2171a is housed in each chamber 1126a.
- a piston bush 2171b and a swash plate 2172 are accommodated in the other end side (lower side in FIG. 26) of the cylinder 2176.
- a through hole 1123a through which the rod 2165 passes is formed at the center of the cylinder block 2173, and the inside of the side wall, the inside of the bottom surface, and the inside of the top surface of the cylinder block 2173 are respectively denoted by reference numeral 1123c. It is a heat-insulating vacuum structure that is hollow and evacuated.
- a suction port 1123d and a discharge port 1123e communicating with each pressurizing chamber 1126a are provided inside the top of the cylinder block 2173 and at positions opposed to the central portion on one end surface side of the piston head 2171a, respectively. ing.
- Each of the suction port 1123d and the discharge port 1123e is provided with a ball type check valve 1130 to control the suction and discharge of the low temperature fluid.
- Each suction port 1123d is provided in communication with a fluid suction path 1131 drilled in the cylinder block 2173, while each discharge port 1123e is provided in communication with a fluid discharge path 1132 drilled in the cylinder block 2173. It has been. Therefore, the fluid suction path 1131 also has a low-temperature fluid guided into the pressurized chamber 1126a through the suction port 1123d. For example, after being compressed (pressurized) to 30 MPa, it is led from the discharge port 1123e to the outside of the cylinder block 2173 through the fluid discharge path 1132.
- the low-temperature fluid led out of the cylinder block 2173 through the fluid discharge path 1132 is stored (stored) in the chamber 1134 through the pipe 1133.
- the low-temperature fluid stored in the chamber 1 134 is guided to the heat exchange ⁇ 1136 via the pipe 1135 and gasified, and most of the low-temperature fluid is supplied to the fuel injection device (not shown) via the pipe 1137.
- a part of the piston head 2171a is located inside the pressurizing chamber 1126a (that is, on the opposite side of the bellows 1140) via a pipe 1138 and a pressure regulator (decompressor) 1139. The space).
- a low-temperature fluid whose pressure has been increased to 30 MPa is stored.
- the pressurized chamber 1126a is supplied with, for example, a 15 MPa gasified low-temperature fluid decompressed by the pressure regulator 1139.
- a bellows (partition member) 1140 is provided in each pressurizing chamber 1126a.
- the bellows 1140 includes an inner peripheral side (piston rod 2171c side) and an outer peripheral side (cylinder block 2173 side) of the pressurizing chamber 1126a located on the piston shoe 2171b side (lower side in FIG. 26) with respect to the piston head 2171a.
- One end of the piston head 2171a is attached to the surface opposite to the one end surface (the other end surface), and the other end is attached to the inner wall surface of the cylinder block 2173. ing.
- a bellows (partition member) 2180 is also provided on the radially outer side of one end of the piston rod 2171c.
- the bellows 2180 partitions (separates) the piston rod 2171c into an inner peripheral side (piston rod 2171c side) and an outer peripheral side (cylinder block 2173 side) at one end of the piston rod 2171c.
- the other end of 2171b (the upper surface in FIG. 26) is attached to the outer peripheral end, and the other end is attached to the inner wall of cylinder block 2173.
- Each of these bellows 1140, 2180 is made of, for example, stainless steel or Inconel, which is stretchable at (very) low temperatures.
- reference numerals 1142, 1143, and 1144 are seal members that are annular (insulating) in plan view, and reference numerals 2181 and 2182 are thrust roller bearings.
- the piston sleeve 2171b slides along the sliding surface P via the thrust bearing 2181 and the piston 2171 cylinder
- the low-temperature fluid reciprocated in 2176 and flowed into the caloric pressure chamber 1126a is successively compressed.
- the stroke of the piston 2171 is set to 2 mm, for example.
- the rod 2165 is rotated in the negative direction (the direction of the arrow in FIG. 26), whereby the cryogenic fluid is compressed by one end surface of the piston head 2171a. It is like that. That is, when compressing a low temperature fluid, the compression force is applied to the rod 2165!
- the diameter of the rod 2165 can be made smaller than that of the conventional piston rod type in which compression force is applied to the rod, so that heat input can be reduced and the light weight of the rod 2165 can be reduced. Can reduce the overall weight of the pump.
- the pressurizing chamber 1126a since there is no portion that moves in contact with the inner peripheral surface of the pressurizing chamber 1126a (for example, a conventional piston ring), heat generation in the pressurizing chamber 1126a can be prevented. In addition, the low temperature fluid can be prevented from being heated.
- the inner peripheral side force of the pressurizing chamber 1126a is also increased. Can prevent leakage of low-temperature fluid from the outer periphery of the chamber (or from the outer periphery of the pressurizing chamber 1126a to the inner periphery of the pressurizing chamber 1126a), improving the compression efficiency of the cryogenic fluid booster pump 2009 Can be made.
- the bellows 1140 Furthermore, on the outside (radially outside) of the bellows 1140, there is a low-temperature fluid that is gasified by heat exchange 1136 and whose pressure is adjusted to a predetermined pressure (for example, 15 MPa) by the pressure regulator 1139. Therefore, the deformation of the bellows 1140 when compressing the low-temperature fluid sucked into the bellows 1140 can be reduced, the life of the bellows 1140 can be extended, and the pressure for low-temperature fluid can be increased. Reliability of pump 2009 Can be improved.
- the pump unit 2162 Since the rod 2165 connected to the power transmission unit 2166 extends on the same side as the side where the suction port 1123d and the discharge port 1123e are arranged (upper side in FIG. 26), the pump unit 2162 The length in the longitudinal direction (axial direction) can be shortened, and the length in the longitudinal direction (axial direction) of the entire pump can be shortened, thereby reducing the size and weight of the pump. it can.
- the force described for a four-cylinder cylinder having four pistons and four cylinders is provided.
- the present invention is not limited to this.
- a single cylinder, a two-cylinder, a three-cylinder, etc. It is also possible to adopt a configuration with more than five cylinders.
- the thrust roller bearing 2182 described in the sixteenth embodiment is not limited to one that supports the central portion of the lower surface of the swash plate 2172 as shown in FIG. 26.
- the entire lower surface of the swash plate 2172 Can be supported by a plurality of thrust roller bearings arranged in the circumferential direction.
- the swash plate 2172 is configured to be changeable by using an angular force actuator or the like, that is, a variable capacity type. As a result, the pump discharge amount can be changed simply by changing the angle of the swash plate 2172 without changing the drive rotational speed of the pump.
- the force in which the ball type check valve 1130 is provided in each of the suction port 1123d and the discharge port 1123e is not limited to this.
- a reed valve, a poppet valve, or the like is not limited to this.
- bellows 1140, 1141, 2180 having a cross section as shown by a solid line or a two-dot chain line in FIG. It can also be adopted.
- it can be a convex shape having one bulge on the radially outer side indicated by a solid line in FIG. 22, or a dent having a single dent on the radially inner side indicated by a two-dot chain line in FIG. It ’s the name of Chitose.
- the heat insulation connecting portion 328 shown in FIG. 24 is limited to the above-described one. For example, it may be as shown in FIG.
- the above-described chamber 1134 is provided with a relief valve, and the low-temperature fluid spouted from the relief valve is also connected to the pump suction side (or a separate fuel cell is provided via a return pipe). It is even more preferable that something is returned to the fuel cell! /.
- the drive unit 311 in the eighth to fourteenth embodiments forcibly drives the rod 320, which is not limited to the one shown in the figure. It is a word that comes from life such as Ma Ward.
- the piston rod 1122 and the connecting member 1124, and the rod 2165 and the swash plate 2172 are described in the eighth embodiment to the fourteenth embodiment, respectively. It is more preferable that the heat insulating material 327 is connected (connected).
- a piston body, a piston head, and the like that are housed in a cylinder and reciprocate in the cylinder are included in the cylinder.
- a guide member is provided between the piston rods 322 and 1122 and the cylinder blocks 323 and 1123, between the piston bodies 324 and 524 and the cylinder 326, or between the connecting member 1124 and the cylinder 1126 so as not to collide with the wall surface (cylinder wall).
- a guide member is provided.
- the reciprocating member force of the piston main body, the piston head, etc. reciprocates without shaking or vibrating, and the reciprocating member can be prevented from colliding with the inner wall surface of the cylinder. At the same time, the reciprocating member can be driven smoothly with minimal power. [0166] Furthermore, in each of the above-described fourteenth to sixteenth embodiments, the space in which the low-temperature fluid gasified in these embodiments is supplied can be evacuated. .
- a space on the inner peripheral side and a space on the outer peripheral side of the piston rod 1122 are provided between the lower surface of the other end 328b of the piston rod 1122 and the upper surface of the bottom of the internal space 329.
- a separate bellows (similar to bellows 1141) is provided. That is, the space between the cylinder block 1123 and the piston rod 1122 is in a vacuum state, and heat from the piston rod 1122 (that is, the driving source 1 111 side force also enters the piston rod 1122 side into the cylinder block 1123. Prevent heat from being transmitted! / Thereby, the temperature rise of the cylinder block 1123 is suppressed, and the temperature rise of the low-temperature fluid flowing into the pressurizing chamber 1126a is suppressed.
- low temperature refers to about 273 ° C to 0 ° C or less
- high pressure refers to 0.2 MPa to 200 MPa.
- fluid in the present specification includes “liquid”, “gas”, and “colloid”.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Compressor (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/630,900 US20090165640A1 (en) | 2004-06-30 | 2005-06-28 | Booster pump and low-temperature-fluid storage tank having the same |
EP05755797A EP1767783B1 (en) | 2004-06-30 | 2005-06-28 | Booster pump and storage tank for low-temperature fluid comprising same |
JP2006528677A JPWO2006003871A1 (ja) | 2004-06-30 | 2005-06-28 | 昇圧ポンプおよびこれを備えた低温流体用貯蔵タンク |
DE602005020794T DE602005020794D1 (de) | 2004-06-30 | 2005-06-28 | Druckerhöhungspumpe und diese umfassender speichertank für fluide auf niedrigen temperaturen |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-194641 | 2004-06-30 | ||
JP2004194641 | 2004-06-30 | ||
JP2004302048 | 2004-10-15 | ||
JP2004-302048 | 2004-10-15 | ||
JP2004-377938 | 2004-12-27 | ||
JP2004377938 | 2004-12-27 | ||
JP2005-003993 | 2005-01-11 | ||
JP2005003993 | 2005-01-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006003871A1 true WO2006003871A1 (ja) | 2006-01-12 |
Family
ID=35782679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/011783 WO2006003871A1 (ja) | 2004-06-30 | 2005-06-28 | 昇圧ポンプおよびこれを備えた低温流体用貯蔵タンク |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090165640A1 (ja) |
EP (2) | EP1767783B1 (ja) |
JP (1) | JPWO2006003871A1 (ja) |
DE (1) | DE602005020794D1 (ja) |
WO (1) | WO2006003871A1 (ja) |
Cited By (3)
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WO2010099554A1 (de) | 2009-03-02 | 2010-09-10 | Spantec Gmbh | VERFAHREN ZUR DETEKTION EINER AUßERGEWÖHNLICHEN SITUATION |
CN104105875A (zh) * | 2011-11-29 | 2014-10-15 | 克里奥斯塔股份有限公司 | 低温泵 |
WO2018143419A1 (ja) | 2017-02-03 | 2018-08-09 | イーグル工業株式会社 | 液体供給システム |
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DE102007040089A1 (de) * | 2007-08-24 | 2009-02-26 | Linde Ag | Pumpe, insbesondere für kryogene Medien |
US20160123313A1 (en) * | 2014-11-05 | 2016-05-05 | Simmons Development, Llc | Pneumatically-operated fluid pump with amplified fluid pressure, and related methods |
US10006449B2 (en) | 2015-01-14 | 2018-06-26 | Caterpillar Inc. | Bearing arrangement for cryogenic pump |
US9828987B2 (en) * | 2015-01-30 | 2017-11-28 | Caterpillar Inc. | System and method for priming a pump |
DE102016210737A1 (de) * | 2016-06-16 | 2017-12-21 | Robert Bosch Gmbh | Förderpumpe für kryogene Kraftstoffe |
US10240562B2 (en) | 2016-10-24 | 2019-03-26 | Progress Rail Locomotive Inc. | Machine system having submersible pumping system, and method |
US10240722B2 (en) | 2016-10-24 | 2019-03-26 | Progress Rail Locomotive Inc. | Cryogenic fluid system and method of operating same |
RU2724614C1 (ru) * | 2017-02-03 | 2020-06-25 | Игл Индастри Ко., Лтд. | Теплоизоляционная структура и система подачи жидкости |
DE102018217644A1 (de) * | 2018-10-15 | 2020-04-16 | Hyundai Motor Company | Hochdruckpumpe und verfahren zum verdichten eines fluids |
JP6781795B2 (ja) * | 2019-04-09 | 2020-11-04 | 株式会社Ihi回転機械エンジニアリング | 往復動圧縮機 |
US11268487B1 (en) * | 2020-12-10 | 2022-03-08 | EP Transfer Systems LLC | Energy balanced system for generating electric power |
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Cited By (5)
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---|---|---|---|---|
WO2010099554A1 (de) | 2009-03-02 | 2010-09-10 | Spantec Gmbh | VERFAHREN ZUR DETEKTION EINER AUßERGEWÖHNLICHEN SITUATION |
CN104105875A (zh) * | 2011-11-29 | 2014-10-15 | 克里奥斯塔股份有限公司 | 低温泵 |
JP2015501901A (ja) * | 2011-11-29 | 2015-01-19 | クライオスター・ソシエテ・パール・アクシオンス・サンプリフィエ | 極低温ポンプ |
WO2018143419A1 (ja) | 2017-02-03 | 2018-08-09 | イーグル工業株式会社 | 液体供給システム |
KR20190098219A (ko) | 2017-02-03 | 2019-08-21 | 이글 고오교 가부시키가이샤 | 액체 공급 시스템 |
Also Published As
Publication number | Publication date |
---|---|
US20090165640A1 (en) | 2009-07-02 |
JPWO2006003871A1 (ja) | 2008-04-17 |
DE602005020794D1 (de) | 2010-06-02 |
EP2071190A1 (en) | 2009-06-17 |
EP1767783A4 (en) | 2008-07-30 |
EP1767783B1 (en) | 2010-04-21 |
EP1767783A1 (en) | 2007-03-28 |
EP2071190B1 (en) | 2012-09-26 |
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