CN108035857B - Axial plunger pump/motor and sea water desalination hydraulic system - Google Patents
Axial plunger pump/motor and sea water desalination hydraulic system Download PDFInfo
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- CN108035857B CN108035857B CN201810011125.2A CN201810011125A CN108035857B CN 108035857 B CN108035857 B CN 108035857B CN 201810011125 A CN201810011125 A CN 201810011125A CN 108035857 B CN108035857 B CN 108035857B
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- swash plate
- plunger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- 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
- F04B1/20—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 rotary cylinder block
- F04B1/2014—Details or component parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- 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
- F04B1/20—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 rotary cylinder block
- F04B1/22—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 rotary cylinder block having two or more sets of cylinders or pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
Abstract
The invention discloses an axial plunger type pump/motor and a seawater desalination hydraulic system, which are used for improving the energy utilization rate of the seawater desalination hydraulic system and saving the energy cost. The axial plunger pump/motor comprises a shell, a swash plate mechanism, a rotating shaft, a cylinder body, a first return disc, a second return disc, a group of first plungers, a group of second plungers, a first valve plate and a second valve plate, wherein the swash plate mechanism, the rotating shaft, the cylinder body, the first return disc, the second return disc, the group of first plungers, the first valve plate and the second valve plate are arranged in the shell, the first plungers are assembled in the corresponding holes of the first return disc and the cylinder body in a sliding manner, and the first plungers are in sliding contact with the swash plate surface through first sliding shoes; the second plunger is assembled in the second return disc and the corresponding pore canal of the cylinder body in a sliding way, and the second plunger is in sliding contact with the sloping cam plate surface through the second sliding shoe; the shell is provided with a first fluid inlet, a first fluid outlet, a second fluid inlet and a second fluid outlet, which correspond to the first fluid suction window and the first fluid discharge window of the first valve plate, and the second fluid suction window and the second fluid discharge window of the second valve plate.
Description
Technical Field
The invention relates to the technical field of hydraulic equipment, in particular to an axial plunger type pump/motor and a sea water desalination hydraulic system.
Background
With the development of society, the problem of fresh water resource shortage is increasingly serious, and in order to solve the problem, the construction of sea water desalination engineering is imperative. At present, a plurality of sea water desalination technologies are applied to engineering practice, wherein multi-stage flash evaporation, low-temperature multi-effect and reverse osmosis membrane water treatment are three main technologies, and the reverse osmosis membrane water treatment technology is widely applied due to the characteristics of low investment, low energy consumption, small occupied area, convenient operation and the like.
When the reverse osmosis membrane water treatment technology in the prior art is used for desalting sea water, a certain amount of fluid cannot permeate the reverse osmosis membrane, about 60% of feed pressure energy exists in the waste fluid, energy waste is caused by direct waste, and the energy utilization rate of a system is low, so that how to improve the energy utilization rate of the system and save energy cost is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention aims to provide an axial plunger type pump/motor and a sea water desalination hydraulic system, so as to improve the energy utilization rate of the sea water desalination hydraulic system and save the energy cost.
The embodiment of the invention provides an axial plunger type pump/motor, which comprises a shell, and a swash plate mechanism, a rotating shaft, a cylinder body, a first return disc, a second return disc, a group of first plungers, a group of second plungers, a first valve plate and a second valve plate which are arranged in the shell, wherein:
the sloping cam plate mechanism is fixedly connected with the shell;
the rotating shaft comprises a first shaft end and a second shaft end, the first shaft end extends out of the shell, and the second shaft end is abutted with the center of the first return disc through the pre-tightening spring component;
the cylinder body is fixed on the rotating shaft and is provided with a group of first plunger holes arranged along a first circumference and a group of second plunger holes arranged along a second circumference, and the first circumference and the second circumference are coaxially arranged with the rotating shaft;
the second return disc is sleeved on the outer side of the first return disc, a group of first plunger passing holes are formed in the first return disc corresponding to a group of first plunger holes, a group of second plunger passing holes are formed in the second return disc corresponding to a group of second plunger holes, and the first return disc and the second return disc are spaced from the swash plate surface of the swash plate mechanism;
the first plungers are correspondingly and slidably arranged in the first plunger holes one by one, and one end of the first plungers, which is close to the fixed swash plate mechanism, is in sliding contact with the swash plate surface through the first sliding shoes; the group of second plungers are correspondingly and slidably arranged in the group of second plunger through holes one by one and are correspondingly and slidably arranged in the group of second plunger holes one by one, and one end of the group of second plungers, which is close to the fixed swash plate, is in sliding contact with the swash plate surface through a second sliding shoe;
the first valve plate and the second valve plate are arranged on one side of the cylinder body far away from the first return disc and are fixedly connected with the shell, and the first valve plate comprises a first fluid suction window and a first fluid discharge window which are opposite to the first circumference; the second port plate includes a second fluid intake window and a second fluid exhaust window opposite the second circumferential direction;
the housing includes a first fluid inlet in communication with the first fluid intake window, a first fluid outlet in communication with the first fluid exhaust window, a second fluid inlet in communication with the second fluid intake window, and a second fluid outlet in communication with the second fluid exhaust window.
When the axial plunger type pump/motor provided by the embodiment of the invention is adopted, the cylinder body is driven to rotate when the rotating shaft rotates, the swash plate mechanism, the first valve plate and the second valve plate are fixed, and one group of first plungers reciprocate in one group of first plunger holes under the action of the first return plate, so that the pore volume formed by one group of first plungers and one group of first plunger holes is changed, low-pressure useful fluid enters into the pore with gradually increased volume formed by the first plungers and the first plunger holes through the first fluid inlet and the first fluid suction window, and meanwhile, high-pressure useful fluid is discharged from the pore with gradually reduced volume formed by the first plungers and the first plunger holes through the first fluid discharge window and the first fluid outlet, so that high-pressure useful fluid with relatively stable pressure and flow is output. Similarly, the group of second plungers reciprocate in the group of second plungers under the action of the second return disc, so that the pore volume formed by the group of second plungers and the group of second plungers is changed, waste fluid with residual pressure enters into the pore cavity formed by the second plungers and the second plungers through the second fluid inlet and the second fluid suction window, so that fluid pressure acting on the second plungers to enable the second plungers to extend out of the rigid body is formed, the second sliding shoes hinged with the second plungers are pressed towards the inclined disc surface, the reaction force of the inclined disc to the second sliding shoes comprises a component balanced with the fluid pressure acting on the second plungers and a component perpendicular to the axis of the second plungers, and the component perpendicular to the axis of the second plungers forms torque to the axis of the cylinder body to drive the cylinder body to rotate, so that the input torque of the rotary shaft is reduced, namely the output power of the rotary shaft driving motor is reduced, the energy utilization rate is improved, and the energy cost is saved; and simultaneously, the pressure release waste fluid is discharged from the cavity with gradually reduced volume formed by the second plunger and the second plunger hole through the second fluid discharge window and the second fluid outlet. In addition, the double-port plate arrangement is adopted in the embodiment of the invention, so that the mixing of waste fluid and useful fluid can be effectively avoided.
Preferably, the swash plate mechanism includes: a variable adjustment mechanism for adjusting the inclination angle of the first swash plate portion, the second swash plate portion;
the first swash plate part is fixedly connected with the shell, the second swash plate part is sleeved outside the first swash plate part, the first return disc is arranged relative to the first swash plate part, and the second return disc is arranged relative to the second swash plate part.
The inclined surface inclination angles of the first inclined disc part and the second inclined disc part can be adjusted respectively.
Preferably, the second swash plate portion includes a second return disc limiting portion, the second return disc is assembled to the second return disc limiting portion, and the second return disc rotates relative to the second swash plate portion. The second return disc is enabled to run more stably when rotating relative to the second sloping cam plate part by arranging the second return disc limiting part.
Preferably, the pretensioning spring assembly includes: spring frame, spring sleeve, center spring and butt ball, wherein:
the pre-tightening spring component is fixed at the second shaft end of the rotating shaft through a spring frame; the spring sleeve is movably sleeved in the spring frame; two ends of the central spring are respectively abutted with the spring sleeve and the spring frame; the abutting ball is movably arranged between the spring sleeve and the first return disc and enables the spring sleeve to abut against the first return disc. Therefore, the central spring can be well limited, and is not easy to bend in the working process.
Preferably, the cylinder end surfaces on which the first port plate and the second port plate are disposed are stepped. The first valve plate and the second valve plate can be more firmly installed with the cylinder body by enabling the end surfaces of the cylinder body on which the first valve plate and the second valve plate are installed to be in a stepped shape.
Preferably, the casing comprises an end cover, a first casing part, a second casing part and a through cover which are fixedly connected in sequence, wherein the swash plate mechanism, the first return disc, the second return disc, the rotating shaft, the cylinder body, a group of first plungers and a group of second plungers are arranged in the first casing part; the first valve plate and the second valve plate are arranged between the cylinder body and the second shell part and are fixedly connected with the second shell part; the first shaft end of the rotating shaft extends out of the through cover. Through setting up the casing into fixed connection's in proper order end cover, first casing portion, second casing portion and logical lid, can make each part of axial plunger pump/motor comparatively convenient in the equipment dismantlement in-process.
Preferably, the apertures of the set of first plunger holes and the set of second plunger holes are the same. The first plunger hole and the second plunger hole are set to be the same in aperture, so that the machining process of the holes is simplified.
The embodiment of the invention also provides a sea water desalination hydraulic system which comprises the axial plunger pump/motor.
When the rotary shaft of the axial plunger pump/motor in the seawater desalination hydraulic system rotates, the cylinder body is driven to rotate, the swash plate mechanism, the first valve plate and the second valve plate are fixed, and one group of first plungers reciprocate in one group of first plunger holes under the action of the first return plate, so that the pore volume formed by one group of first plungers and one group of first plunger holes is changed, low-pressure useful fluid enters into the pore with gradually increased volume formed by the first plungers and the first plunger holes through the first fluid inlet and the first fluid suction window, and meanwhile, high-pressure useful fluid is discharged from the pore with gradually reduced volume formed by the first plungers and the first plunger holes through the first fluid discharge window and the first fluid outlet, so that high-pressure useful fluid with stable pressure and flow is output. Similarly, the group of second plungers reciprocate in the group of second plungers under the action of the second return disc, so that the pore volume formed by the group of second plungers and the group of second plungers is changed, waste fluid with residual pressure enters into the pore cavity formed by the second plungers and the second plungers through the second fluid inlet and the second fluid suction window, so that fluid pressure acting on the second plungers to enable the second plungers to extend out of the rigid body is formed, the second sliding shoes hinged with the second plungers are pressed towards the inclined disc surface, the reaction force of the inclined disc to the second sliding shoes comprises a component balanced with the fluid pressure acting on the second plungers and a component perpendicular to the axis of the second plungers, and the component perpendicular to the axis of the second plungers forms torque to the axis of the cylinder body to drive the cylinder body to rotate, so that the input torque of the rotary shaft is reduced, namely the output power of the rotary shaft driving motor is reduced, the energy utilization rate is improved, and the energy cost is saved; and simultaneously, the pressure release waste fluid is discharged from the cavity with gradually reduced volume formed by the second plunger and the second plunger hole through the second fluid discharge window and the second fluid outlet. In addition, the double-port plate arrangement is adopted in the embodiment of the invention, so that the mixing of waste fluid and useful fluid can be effectively avoided.
Drawings
FIG. 1 is a schematic illustration of an axial plunger pump/motor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the distribution of first and second plunger holes of a cylinder according to an embodiment of the present invention;
FIG. 3 is a schematic view of a second port plate according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a first port plate according to an embodiment of the present invention.
Reference numerals:
1-end caps; 2-a second return tray limiting part; 3-a second backhaul tray; 4-a second swash plate part; 5-a second slipper;
6-a first slipper; 7-a first backhaul tray; 8-a first swash plate portion; 9-abutting the ball; 10-a spring sleeve;
11-a center spring; 12-spring rack; 13-a variable adjustment mechanism; 14-a cylinder; 15-a second plunger;
16-a first plunger; 17-a first plunger hole; 18-a second plunger hole; 19-a second port plate;
20-a second fluid outlet; 21-a first fluid outlet; 22-a second housing part; 23-a first port plate;
24-through cover; 25-rotating shaft; 26-a first fluid inlet; 27-a second fluid inlet; 28-a first housing part;
29-a first fluid intake window; 30-a first fluid discharge window;
31-a second fluid intake window; 32-a second fluid discharge window.
Detailed Description
In order to improve the energy utilization rate of the sea water desalination hydraulic system and save energy cost, the embodiment of the invention provides an axial plunger pump/motor and the sea water desalination hydraulic system. The present invention will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
As shown in fig. 1 to 4, an embodiment of the present invention provides an axial plunger pump/motor including a housing, and a swash plate mechanism, a rotary shaft 25, a cylinder block 14, a first return disc 7, a second return disc 3, a set of first plungers 16 and a set of second plungers 15, a first port plate 23, a second port plate 19 provided in the housing, wherein:
the sloping cam plate mechanism is fixedly connected with the shell;
the rotating shaft 25 comprises a first shaft end and a second shaft end, the first shaft end extends out of the shell, and the second shaft end is abutted with the center of the first return disc 7 through the pre-tightening spring component;
the cylinder 14 is fixed on the rotating shaft 25, and is provided with a group of first plunger holes 17 arranged along a first circumferential direction and a group of second plunger holes 18 arranged along a second circumferential direction, wherein the first circumferential direction and the second circumferential direction are coaxially arranged with the rotating shaft 25;
the second return disc 3 is sleeved outside the first return disc 7, a group of first plunger through holes are formed in the first return disc 7 corresponding to a group of first plunger holes 17, a group of second plunger through holes are formed in the second return disc corresponding to a group of second plunger holes 18, and the first return disc 7 and the second return disc 3 are spaced from the swash plate surface of the swash plate mechanism;
the first plungers 16 are correspondingly and slidably arranged in the first plunger through holes and the first plunger holes 17, and one end of the first plungers 16 close to the fixed swash plate mechanism is in sliding contact with the swash plate surface through the first sliding shoes 6; a group of second plungers 15 are slidably fitted in the group of second plunger passing holes in one-to-one correspondence and in the group of second plunger holes 18 in one-to-one correspondence, and one end of the group of second plungers 15 close to the fixed swash plate is slidably contacted with the swash plate surface through the second shoes 5;
the first port plate 23 and the second port plate 19 are disposed on one side of the cylinder 14 away from the first return plate 7 and fixedly connected with the housing, and the first port plate 23 includes a first fluid intake window 29 and a first fluid discharge window 30 opposite to the first circumferential direction; the second port plate 19 includes a second fluid intake window 31 and a second fluid exhaust window 32 opposite the second circumferential direction;
the housing comprises a first fluid inlet 26 communicating with a first fluid suction window 29, a first fluid outlet 21 communicating with a first fluid discharge window 30, a second fluid inlet 27 communicating with a second fluid suction window 31, and a second fluid outlet 20 communicating with a second fluid discharge window 32.
As shown in fig. 1, 3 and 4, in the embodiment of the present invention, a dual port plate arrangement is adopted, where the first port plate 23 is used for distributing low-pressure useful fluid, and the second port plate 19 is used for distributing waste fluid, so that mixing of waste fluid and useful fluid can be effectively avoided.
In the embodiment of the invention, the axial plunger pump is a power element of a hydraulic system and can convert input mechanical energy into fluid pressure energy to supply oil to the system.
In another embodiment of the present invention, the structure of the axial plunger motor is the same as that described above, and will not be discussed here. The axial plunger type motor is an executive component of a hydraulic system, can convert hydraulic energy input by a pump into mechanical energy, and drives a working machine to work.
When the rotary shaft 25 rotates to drive the cylinder 14 to rotate, the swash plate mechanism, the first valve plate 23 and the second valve plate 19 are fixed, and the first plungers 16 reciprocate in the first plunger holes 17 under the action of the first return plate 7, so that the pore volume formed by the first plungers 16 and the first plunger holes 17 is changed, low-pressure useful fluid enters the pore formed by the first plungers 16 and the first plunger holes 17 through the first fluid inlet 26 and the first fluid suction window 29, and meanwhile, the pore formed by the first plungers 16 and the first plunger holes 17, which is gradually reduced in volume, is discharged through the first fluid discharge window 30 and the first fluid outlet 21, so that high-pressure useful fluid with stable pressure and flow is output. Similarly, the group of second plungers 15 reciprocate in the group of second plunger holes 18 under the action of the second return disc 3, so that the pore volume formed by the group of second plungers 15 and the group of second plunger holes 18 changes, waste fluid with residual pressure enters into the pore cavity formed by the second plungers 15 and the second plunger holes 18 through the second fluid inlet 27 and the second fluid suction window 31, fluid pressure acting on the second plungers 15 to enable the second plungers 15 to extend outwards of the cylinder 14 is formed, so that the second sliding shoes 5 hinged with the second plungers 15 are pressed towards the inclined disc surface, the reaction force of the inclined disc to the second sliding shoes 5 can be divided into a component balanced with the fluid pressure acting on the second plungers 15 and a component perpendicular to the axis of the second plungers 15, and the component perpendicular to the axis of the second plungers 15 forms torque to the axis of the cylinder 14 to drive the cylinder 14 to rotate, so that the input torque of the rotating shaft 25 is reduced, namely the output power of the driving motor of the rotating shaft 25 is improved, the energy utilization rate is saved, and the energy cost is saved; at the same time, the depressurized waste fluid is discharged from the cavity formed by the second plunger 15 and the second plunger hole 18, the volume of which is gradually reduced, through the second fluid discharge window 32 and the second fluid outlet 20. And when the first fluid discharge window 30 for discharging high-pressure useful fluid and the second fluid suction window 31 for sucking residual pressure waste fluid are arranged at opposite sides relative to the axis of the rotating shaft 25, the overturning moment of the cylinder 14 can be effectively reduced, and the automatic compensation of the end face gap of the valve plate can be realized.
As shown in fig. 1, in a preferred embodiment of the present invention, the swash plate mechanism includes: a variable adjustment mechanism 13 for adjusting the inclination angle of the first swash plate 8, the second swash plate 4, and the second swash plate 4;
the first swash plate part 8 is fixedly connected with the shell, the second swash plate part 4 is sleeved outside the first swash plate part 8, the first return disc 7 is arranged opposite to the first swash plate part 8, and the second return disc 3 is arranged opposite to the second swash plate part 4.
The arrangement is such that the inclination angles of the inclined surfaces of the first swash plate portion 8 and the second swash plate portion 4 can be adjusted, respectively, to thereby change the maximum protrusion amount of the one set of first plungers 16 with respect to the one set of first plunger holes 17 and the maximum protrusion amount of the one set of second plungers 15 with respect to the one set of second plunger holes 18, thereby changing the maximum volume of each plunger hole bore.
Referring to fig. 1, in a preferred embodiment of the present invention, the second swash plate 4 includes a second return disc limiting portion 2, the second return disc 3 is assembled to the second return disc limiting portion 2, and the second return disc 3 rotates relative to the second swash plate 4. The second return disc 3 can rotate relative to the second swash plate 4 more stably by arranging the second return disc limiting part 2.
With continued reference to FIG. 1, in a preferred embodiment of the present invention, the pretensioning spring assembly includes: spring carrier 12, spring sleeve 10, center spring 11 and abutment ball 9, wherein:
the pre-tightening spring component is fixed at the second axial end of the rotating shaft 25 through the spring frame 12; the spring sleeve 10 is movably sleeved in the spring frame 12; two ends of the center spring 11 are respectively abutted against the spring sleeve 10 and the spring frame 12; the abutment ball 9 is movably mounted between the spring sleeve 10 and the first return disc 7 and abuts the spring sleeve 10 against the first return disc 7. Therefore, the central spring 11 can have a good limiting effect, so that the central spring is not easy to bend in the working process; the specific material of the contact ball is not limited, and may be, for example, a steel ball.
In a preferred embodiment of the invention, the cylinder end faces of the first and second port plates are stepped. The first valve plate and the second valve plate can be more firmly installed with the cylinder body by enabling the end surfaces of the cylinder body on which the first valve plate and the second valve plate are installed to be in a stepped shape.
As shown in fig. 1, in the preferred embodiment of the present invention, the housing includes an end cover 1, a first housing portion 28, a second housing portion 22 and a through cover 24 which are fixedly connected in sequence, wherein a swash plate mechanism, a first return disc 7, a second return disc 3, a rotating shaft 25, a cylinder block 14, a set of first plungers 16 and a set of second plungers 15 are disposed in the first housing portion 28; the first port plate 23 and the second port plate 19 are arranged between the cylinder 14 and the second housing part 22 and fixedly connected with the second housing part 22; the first shaft end of the rotating shaft 25 extends out of the through cover 24. By providing the housing as the end cap 1, the first housing portion 28, the second housing portion 22 and the through cap 24 which are fixedly connected in this order, assembly and disassembly of the components of the axial plunger pump/motor can be facilitated.
Wherein, in order to make the rotation of the rotation shaft 25 smooth, the first shaft end of the rotation shaft 25 can be supported in the second housing part 22 through a first bearing, and the cylinder 14 can be supported in the first housing part 28 through a second bearing; the specific fixed connection mode of the cylinder 14 and the rotating shaft 25 is not limited, and can be spline or the like; the specific fixed connection manner of the first port plate 23 and the second port plate 19 with the second housing portion 22 is not limited, and may be a positioning pin, a positioning key, etc.; the specific manner of fixing the swash plate mechanism to the first housing portion 28 is not limited, and may be a positioning pin, a positioning key, or the like.
In a preferred embodiment of the invention, as shown in fig. 2, the apertures of the set of first plunger holes 17 and the set of second plunger holes 18 are the same. The diameters of the first plunger hole 17 and the second plunger hole 18 may be the same or different, and may be appropriately selected according to circumstances, so that the processing process of the holes can be simplified when the first plunger hole 17 and the second plunger hole 18 are set to the same diameter.
The embodiment of the invention also provides a sea water desalination hydraulic system which comprises the axial plunger pump/motor.
When the rotary shaft of the axial plunger pump/motor in the seawater desalination hydraulic system rotates, the cylinder body is driven to rotate, the swash plate mechanism, the first valve plate and the second valve plate are fixed, and one group of first plungers reciprocate in one group of first plunger holes under the action of the first return plate, so that the pore volume formed by one group of first plungers and one group of first plunger holes is changed, low-pressure useful fluid enters into the pore with gradually increased volume formed by the first plungers and the first plunger holes through the first fluid inlet and the first fluid suction window, and meanwhile, high-pressure useful fluid is discharged from the pore with gradually reduced volume formed by the first plungers and the first plunger holes through the first fluid discharge window and the first fluid outlet, so that high-pressure useful fluid with stable pressure and flow is output. Similarly, the group of second plungers reciprocate in the group of second plunger holes under the action of the second return disc, so that the pore volume formed by the group of second plungers and the group of second plunger holes is changed, waste fluid with residual pressure enters into the pore cavity with gradually increased volume formed by the second plungers and the second plunger holes through the second fluid inlet and the second fluid suction window, so that fluid pressure acting on the second plungers to enable the second plungers to extend out of the rigid body is formed, so that a second sliding shoe hinged with the second plungers is pressed towards an inclined disc surface, the reaction force of the inclined disc to the second sliding shoe comprises a component balanced with the fluid pressure acting on the second plungers and a component perpendicular to the plunger axis, the component perpendicular to the plunger axis forms torque on the cylinder axis, and the cylinder is driven to rotate, so that the input torque of a rotating shaft is reduced, namely the output power of a rotating shaft driving motor is reduced, the energy utilization rate is improved, and the energy cost is saved; and simultaneously, the pressure release waste fluid is discharged from the cavity with gradually reduced volume formed by the second plunger and the second plunger hole through the second fluid discharge window and the second fluid outlet. In addition, in the embodiment of the invention, a double-port plate is adopted, wherein the first port plate is used for distributing low-pressure useful fluid, and the second port plate is used for distributing waste fluid, so that the waste fluid and the useful fluid can be effectively prevented from being mixed.
The specific medium application of the seawater desalination system is not limited, and the seawater desalination system can be used for treating sewage, oil and the like.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. An axial plunger pump/motor, comprising a housing, and a swash plate mechanism, a rotating shaft, a cylinder block, a first return disc, a second return disc, a set of first plungers and a set of second plungers, a first port plate, a second port plate disposed in the housing, wherein:
the sloping cam plate mechanism is fixedly connected with the shell;
the rotating shaft comprises a first shaft end and a second shaft end, the first shaft end extends out of the shell, and the second shaft end is abutted with the center of the first return disc through the pre-tightening spring component;
the cylinder body is fixed on the rotating shaft and is provided with a group of first plunger holes arranged along a first circumference and a group of second plunger holes arranged along a second circumference, and the first circumference and the second circumference are coaxially arranged with the rotating shaft;
the second return disc is sleeved on the outer side of the first return disc, a group of first plunger passing holes are formed in the first return disc corresponding to a group of first plunger holes, a group of second plunger passing holes are formed in the second return disc corresponding to a group of second plunger holes, and the first return disc and the second return disc are spaced from the swash plate surface of the swash plate mechanism;
the first plungers are correspondingly and slidably arranged in the first plunger holes one by one, and one end of the first plungers, which is close to the fixed swash plate mechanism, is in sliding contact with the swash plate surface through the first sliding shoes; the group of second plungers are correspondingly and slidably arranged in the group of second plunger through holes one by one and are correspondingly and slidably arranged in the group of second plunger holes one by one, and one end of the group of second plungers, which is close to the fixed swash plate, is in sliding contact with the swash plate surface through a second sliding shoe;
the first valve plate and the second valve plate are arranged on one side of the cylinder body far away from the first return disc and are fixedly connected with the shell, and the first valve plate comprises a first fluid suction window and a first fluid discharge window which are opposite to the first circumference; the second port plate includes a second fluid intake window and a second fluid exhaust window opposite the second circumferential direction;
the first valve plate is used for distributing low-pressure useful fluid, and the second valve plate is used for distributing waste fluid, so that the waste fluid and the useful fluid are prevented from being mixed;
the housing includes a first fluid inlet in communication with the first fluid intake window, a first fluid outlet in communication with the first fluid exhaust window, a second fluid inlet in communication with the second fluid intake window, and a second fluid outlet in communication with the second fluid exhaust window.
2. The axial piston pump/motor as in claim 1, in which the swash plate mechanism comprises: a variable adjustment mechanism for adjusting the inclination angle of the first swash plate portion, the second swash plate portion;
the first swash plate part is fixedly connected with the shell, the second swash plate part is sleeved outside the first swash plate part, the first return disc is arranged relative to the first swash plate part, and the second return disc is arranged relative to the second swash plate part.
3. The axial piston pump/motor as in claim 2, wherein the second swash plate portion includes a second return plate limit portion to which the second return plate is fitted, and the second return plate rotates relative to the second swash plate portion.
4. The axial plunger pump/motor as defined in claim 1, wherein the preload spring assembly comprises: spring frame, spring sleeve, center spring and butt ball, wherein:
the pre-tightening spring component is fixed at the second shaft end of the rotating shaft through a spring frame; the spring sleeve is movably sleeved in the spring frame; two ends of the central spring are respectively abutted with the spring sleeve and the spring frame; the abutting ball is movably arranged between the spring sleeve and the first return disc and enables the spring sleeve to abut against the first return disc.
5. The axial piston pump/motor as in claim 1, in which cylinder end surfaces where said first and second port plates are disposed are stepped.
6. The axial piston pump/motor as in claim 1, wherein the housing comprises an end cap, a first housing portion, a second housing portion, and a through cap fixedly connected in sequence, wherein the swash plate mechanism, the first return disc, the second return disc, the rotating shaft, the cylinder block, the set of first plungers, and the set of second plungers are disposed within the first housing portion; the first valve plate and the second valve plate are arranged between the cylinder body and the second shell part and are fixedly connected with the second shell part; the first shaft end of the rotating shaft extends out of the through cover.
7. The axial plunger pump/motor as defined in claim 1, wherein the apertures of the set of first plunger holes and the set of second plunger holes are the same.
8. A hydraulic seawater desalination system comprising an axial plunger pump/motor as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810011125.2A CN108035857B (en) | 2018-01-05 | 2018-01-05 | Axial plunger pump/motor and sea water desalination hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810011125.2A CN108035857B (en) | 2018-01-05 | 2018-01-05 | Axial plunger pump/motor and sea water desalination hydraulic system |
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| Publication Number | Publication Date |
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| CN108035857A CN108035857A (en) | 2018-05-15 |
| CN108035857B true CN108035857B (en) | 2023-05-30 |
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| CN201810011125.2A Active CN108035857B (en) | 2018-01-05 | 2018-01-05 | Axial plunger pump/motor and sea water desalination hydraulic system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519352B (en) * | 2018-10-22 | 2020-08-28 | 徐州重型机械有限公司 | Plunger pump and engineering machinery |
| CN112796968A (en) * | 2020-12-03 | 2021-05-14 | 北京航空航天大学宁波创新研究院 | Embedded return stroke structure of sloping cam plate and have plunger pump of this structure |
| CN115163443B (en) * | 2022-08-02 | 2024-01-26 | 北京工业大学 | High-pressure pump coupled with piston lever mechanism and energy recovery integrated device |
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| WO2016011898A1 (en) * | 2014-07-21 | 2016-01-28 | 沃尔科技有限公司 | Axial plunger type hydraulic pump |
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| WO2016011898A1 (en) * | 2014-07-21 | 2016-01-28 | 沃尔科技有限公司 | Axial plunger type hydraulic pump |
| WO2017015782A1 (en) * | 2015-07-24 | 2017-02-02 | 杭州绿聚科技有限公司 | Novel axial piston pump |
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