CN210021751U

CN210021751U - Energy recovery device

Info

Publication number: CN210021751U
Application number: CN201920540609.6U
Authority: CN
Inventors: 王越; 孙政; 周杰; 何之颂; 徐世昌; 王世昌
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-02-07
Anticipated expiration: 2029-04-19

Abstract

The utility model belongs to the technical field of energy recuperation utilizes, a energy recuperation device is disclosed, the device passes through the reciprocating motion of plunger in the plunger pipe, realizes exerting pressure high-efficient transmission and the exchange of pressure energy between liquid and pressurized liquid. The sliding ball head at the bottom of the plunger piston and the annular groove on the surface of the swash plate form a sliding fit relation, and the sliding ball head cannot be separated from the annular groove on the surface of the swash plate in the rotating process of the swash plate. The swash plate rotates for a circle, the plunger completes one reciprocating motion in the plunger guide pipe and sequentially passes through a pressurization stage 1 time, a sealing interval stage 1 time, a pressure relief stage 1 time and a sealing interval stage 1 time. The multiple sets of plungers and plunger guide pipe matching bodies are connected in parallel, so that the pressure of the applied pressure liquid can be continuously recycled, pressure building or flow breaking cannot occur, flow and pressure pulsation are reduced, and the running stability of the device is improved. And simultaneously, the utility model discloses still have simple structure, installation space is little, comprehensive efficiency is high and engineering amplification nature advantage such as good.

Description

Energy recovery device

Technical Field

The utility model belongs to the technical field of energy recuperation utilizes, specific theory relates to an energy recuperation device who carries out energy exchange between liquid of exerting pressure and pressurized liquid.

Background

Reverse osmosis seawater desalination is an important technology for solving the shortage of fresh water resources, and is popularized and applied in coastal areas around the world. In order to obtain higher desalinated water recovery rate in the technical process, the pressure of the pressurized liquid at the inlet of the reverse osmosis membrane module is generally required to be as high as 5.5-6.0MPa, so that the energy consumption of system operation is huge. Meanwhile, the pressure of the high-pressure brine discharged from the reverse osmosis membrane group device is up to more than 5.0MPa, and if the high-pressure brine is directly discharged through a pressure reducing valve, the energy of the system is greatly wasted. After the energy recovery device is used, the pressure energy stored in the high-pressure brine discharged by the reverse osmosis membrane group device is reused and transferred to the low-pressure fresh seawater, and the operation energy consumption of the reverse osmosis seawater desalination system can be reduced by more than 50% according to the estimation of the desalination water recovery rate of 40%.

The hydraulic turbine device is an energy recovery device product which is firstly applied to a reverse osmosis seawater desalination system, has good product engineering amplification performance and high single machine treatment capacity, and has the defects that the energy conversion process needs to go through two conversion stages of pressure energy-axial work-pressure energy, and the comprehensive energy recovery efficiency of the device is relatively low and is only 50-80%. The positive displacement energy recovery device can directly transfer the pressure energy of high-pressure salt water to low-pressure seawater, and the energy recovery efficiency is up to more than 90%. Valve-regulated energy recovery devices are one of the typical representatives of positive displacement energy recovery devices, which generally consist of three parts: switch, hydraulic cylinder and check valves. The switcher is used as a core component of the energy recovery device to control the regular water inlet and outlet cylinders of high-pressure brine and pressure relief brine, the hydraulic cylinder is a main place for carrying out pressure exchange, the check valve group is used as a passive execution component to be matched with the switcher to complete the low-pressure seawater and the high-pressure seawater to enter and exit the hydraulic cylinder, and the continuous recycling of the pressure energy of the high-pressure brine is realized through the cooperative work of the switcher, the hydraulic cylinder and the check valve group.

However, the disclosed valve-controlled energy recovery device mainly has the following disadvantages: (1) the switcher for the valve control type energy recovery device mostly adopts a reciprocating type switching structure type, not only has a complex internal structure, but also has larger flow and pressure pulsation of two fluids of high-pressure brine and pressure relief brine controlled by the switcher; (2) the amplification of the processing capacity of the valve-controlled energy recovery device can be realized only by increasing the length or the diameter of the hydraulic cylinder, so that the manufacturing cost and the installation space of the device are obviously increased; (3) the check valve group used by the valve control type energy recovery device needs to meet the high-frequency switching requirement of the pressurization stroke and the pressure release stroke of the device, so that the service life of the check valve group and the overall operation stability of the device are obviously reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an energy recovery device, key solve current valve accuse formula energy recovery device switch structure complicacy, area is big, difficult problem such as flow and pressure pulsation are big.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

an energy recovery device comprises a cylinder body (1), wherein n plunger guide pipes (4) which have the same structure and are uniformly distributed in a concentric circle are arranged in an inner cavity of the cylinder body (1), the upper end and the lower end of each plunger guide pipe (4) are fixed in the inner cavity of the cylinder body (1), pressure liquid inflow windows (4-1), pressure liquid outflow windows (4-2), pressure liquid outflow windows (4-3) and pressure liquid inflow windows (4-4) are arranged on the side walls of the plunger conduits (4) at different heights, wherein the pressurizing liquid inflow window (4-1) is adjacent to the pressurizing liquid outflow window (4-2) and a sealing area is arranged between the pressurizing liquid inflow window and the pressurizing liquid outflow window, wherein the pressurized fluid outflow window (4-3) is adjacent to the pressurized fluid inflow window (4-4) with a sealing area arranged therebetween;

the inner cavity of the cylinder body (1) is provided with a pressure liquid inflow cavity (23), a pressure liquid outflow cavity (24), a pressure liquid outflow cavity (25) and a pressure liquid inflow cavity (26); the pressure liquid inflow cavity (23) is communicated with the pressure liquid inflow window (4-1) and the pressure liquid inlet (17), the pressure liquid outflow cavity (24) is communicated with the pressure liquid outflow window (4-2) and the pressure liquid outlet (19), the pressure liquid outflow cavity (25) is communicated with the pressure liquid outflow window (4-3) and the pressure liquid outlet (18), and the pressure liquid inflow cavity (26) is communicated with the pressure liquid inflow window (4-4) and the pressure liquid inlet (20); the pressure liquid inlet (17), the pressure liquid outlet (18), the pressure liquid outlet (19) and the pressure liquid inlet (20) are all arranged on the cylinder body (1);

a plunger (6) in sliding fit with each plunger guide pipe (4) is arranged in each plunger guide pipe (4), and the plunger (6) reciprocates up and down in the plunger guide pipes (4); the plunger (6) is of a hollow structure with the top end and the bottom end both closed, wherein the upper part and the lower part of the hollow structure are respectively provided with an upper circulation window (6-1) and a lower circulation window (6-2); when the upper flow-through window (6-1) of the plunger (6) moves into communication with the pressurized liquid inflow window (4-1) of the plunger conduit (4), the lower flow-through window (6-2) of the plunger (6) communicates with the pressurized liquid outflow window (4-3) of the plunger conduit (4); when the upper flow-through window (6-1) of the plunger (6) moves to the upper sealing area (4-5) of the plunger conduit (4), the lower flow-through window (6-2) of the plunger (6) moves to the lower sealing area (4-6) of the plunger conduit (4); when the upper flow-through window (6-1) of the plunger (6) is moved into communication with the pressurized liquid outflow window (4-2) of the plunger catheter (4), the lower flow-through window (6-2) of the plunger (6) is in communication with the pressurized liquid inflow window (4-4) of the plunger catheter (4);

the lower end of each plunger (6) extends out of the plunger guide pipe (4) and is fixedly provided with a sliding ball head (15), and the sliding ball head (15) is matched with a swash plate (21) below the plunger (6); in the rotating process of the swash plate (21), the sliding ball head (15) and the annular groove (21-1) on the surface of the swash plate (21) form a sliding fit relation; when the swash plate (21) is driven by the driving mechanism to rotate at a uniform speed, the swash plate (21) drives the plunger (6) to reciprocate through the sliding ball head (15), so that the synchronization of the pressure increasing and releasing process is realized.

Furthermore, an upper fixing plate (16) and a lower fixing plate (13) are fixedly mounted in the inner cavity of the cylinder body (1), and the upper fixing plate (16) and the lower fixing plate (13) are respectively sealed with the cylinder body (1); the upper end of the plunger guide pipe (4) is arranged in a step hole of the upper fixing plate (16), the lower end of the plunger guide pipe is arranged in a step hole of the lower fixing plate (13), and the plunger guide pipe (4) forms sealing with the upper fixing plate (16) and the lower fixing plate (13) respectively; a first fixing plate (7), a second fixing plate (9) and a third fixing plate (11) are sequentially arranged between the upper fixing plate (16) and the lower fixing plate (13) from top to bottom, the first fixing plate (7), the second fixing plate (9) and the third fixing plate (11) form sealing with the cylinder body (1), and the first fixing plate (7), the second fixing plate (9) and the third fixing plate (11) enable the plunger guide pipe (4) to penetrate through and form sealing with the plunger guide pipe;

whereby the first fixing plate (7) seals off the pressurizing liquid inflow window (4-1) and the pressurizing liquid outflow window (4-2) on the plunger catheter (4), the second fixing plate (9) seals off the pressurizing liquid outflow window (4-2) and the pressurized liquid outflow window (4-3) on the plunger catheter (4), the third fixing plate (11) seals off the pressurized liquid outflow window (4-3) and the pressurized liquid inflow window (4-4) on the plunger catheter (4), and the lower fixing plate (13) seals off the pressurized liquid inflow window (4-4) on the plunger catheter (4) and the inner cavity of the barrel (1) below the lower fixing plate (13);

a first sleeve (5) is arranged between the upper fixing plate (16) and the first fixing plate (7), a pressure liquid inlet cavity (23) is formed among the upper fixing plate (16), the first fixing plate (7) and the first sleeve (5), and a circulation hole for communicating the pressure liquid inlet (17) with the pressure liquid inlet cavity (23) is formed in the circumference of the first sleeve (5); a second sleeve (8) is arranged between the first fixing plate (7) and the second fixing plate (9), the pressure liquid outflow cavity (24) is formed among the first fixing plate (7), the second fixing plate (9) and the second sleeve (8), and a circulation hole for communicating the pressure liquid outlet (19) and the pressure liquid outflow cavity (24) is formed in the circumference of the second sleeve (8); a third sleeve (10) is arranged between the second fixing plate (9) and the third fixing plate (11), a pressurized liquid outflow cavity (25) is formed among the second fixing plate (9), the third fixing plate (11) and the third sleeve (10), and a circulation hole which penetrates through the pressurized liquid outlet (18) and the pressurized liquid outflow cavity (25) is formed in the circumference of the third sleeve (10); a fourth sleeve (12) is arranged between the third fixing plate (11) and the lower fixing plate (13), the pressurized liquid inlet cavity (26) is formed among the third fixing plate (11), the lower fixing plate (13) and the fourth sleeve (12), and a circulation hole which penetrates through the pressurized liquid inlet (20) and the pressurized liquid inlet cavity (26) is formed in the circumference of the fourth sleeve (12).

Furthermore, a fixed ball head (27) is installed between the lower fixing plate (13) and the swash plate (21), the top of the fixed ball head (27) is fixedly connected to the center of the lower fixing plate (13), and a ball head structure at the bottom of the fixed ball head (27) is in sliding fit with a fixed ball head retaining ring (28) fixedly installed at the center of the top of the swash plate (21).

Furthermore, the center of the bottom of the swash plate (21) is connected with a main shaft (22), the main shaft (22) is installed on a lower end cover (31) of the cylinder body through a bearing (29) and a bearing cover (30), and the lower end cover (31) of the cylinder body is fixed on the cylinder body (1) and is arranged below the swash plate (21).

Further, the openings of the pressure liquid inflow window (4-1), the pressure liquid outflow window (4-2), the pressure liquid outflow window (4-3) and the pressure liquid inflow window (4-4) are equal in height; the sealing area between the pressure liquid inflow window (4-1) and the pressure liquid outflow window (4-2) is equal in height to the sealing area between the pressure liquid outflow window (4-3) and the pressure liquid inflow window (4-4).

Furthermore, wear-resistant sealing composite layers are arranged on the upper portion of the upper circulation window (6-1), the lower portion of the lower circulation window (6-2) and the portion between the upper circulation window (6-1) and the lower circulation window (6-2) of the plunger (6).

Furthermore, the symmetrical center lines of the n plunger guide pipes (4), the axis of the swash plate (21) and the axis of the cylinder body (1) are all collinear.

Further, the value of n is an integer ranging from 2 to 20.

Further, a wear-resistant sealing composite layer is arranged between the circumferential direction of the swash plate (21) and the inner cavity of the cylinder body (1).

Further, the inclination angle between the surface of the swash plate (21) and the horizontal plane ranges from 5 to 60 degrees.

The utility model has the advantages that:

(one) the utility model discloses a sliding motion of the slip bulb of plunger bottom in the annular groove on swash plate surface turns into the reciprocating motion of plunger with the rotary motion of swash plate, through the switching setting of a plurality of circulation windows between plunger and plunger pipe, realizes energy recuperation device compact integrated design.

(two) the utility model discloses the plunger that uses in the device is the equal confined hollow structure in top and bottom for the liquid of exerting pressure or the pressurized liquid that annotate the notes in the plunger cavity can not additionally produce the axial force effect except gravity to the plunger, and also need not the plunger and promote the acting to liquid of exerting pressure or pressurized liquid in the device operation process, and the device body operation energy consumption is littleer, and comprehensive efficiency is higher.

(III) the utility model discloses the device is through the parallelly connected arrangement of many sets of plungers and plunger pipe cooperation body, realizes the device and increases the enlarged design demand of dilatation to show the flow and the pressure pulsation that have reduced the device, improved the operating stability of device.

Drawings

Fig. 1(a) is a schematic structural diagram of an energy recovery device provided by the present invention;

FIG. 1(b) is a sectional view taken along line A-A of FIG. 1 (a);

FIG. 2(a) is a schematic structural view of the plunger tube of FIG. 1 (a);

FIG. 2(B) is a sectional view taken along line B-B of FIG. 2 (a);

FIG. 3(a) is a schematic view of the plunger of FIG. 1 (a);

FIG. 3(b) is a cross-sectional view C-C of FIG. 3 (a);

FIG. 4(a) is a schematic view of the structure of the swash plate of FIG. 1 (a);

FIG. 4(b) is a top view of FIG. 4 (a);

figure 5 is a schematic illustration of the position of three plungers of the device relative to the swash plate.

In the above figures: 1. a barrel; 2. a stop block is arranged on the cylinder body; 3. an upper end cover of the cylinder body; 4. a plunger conduit; 4-1, a pressurized liquid inflow window; 4-2, a pressurized liquid outflow window; 4-3, a pressurized fluid outflow window; 4-4, a pressurized liquid inflow window; 4-5, an upper sealing area; 4-6, lower sealing area; 5. a first sleeve; 6. a plunger; 6-1, an upper circulation window; 6-2, lower flow-through windows; 7. a first fixing plate; 8. a second sleeve; 9. a second fixing plate; 10. a third sleeve; 11. a third fixing plate; 12. a fourth sleeve; 13. a lower fixing plate; 14. a cylinder lower stop block; 15. a sliding ball head; 16. an upper fixing plate; 17. a pressurized liquid inlet; 18. a pressurized liquid outlet; 19. a pressurized liquid outlet; 20. a pressurized fluid inlet; 21. a swash plate; 21-1, an annular groove; 22. a main shaft; 23. a pressurized liquid inlet chamber; 24. a pressurized liquid outflow chamber; 25. a pressurized fluid outflow chamber; 26. a pressurized fluid inlet chamber; 27. fixing the ball head; 28. fixing a ball head retaining ring; 29. a bearing; 30. a bearing cap; 31. and a lower end cover of the cylinder body.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:

as shown in fig. 1(a) and fig. 1(b), the present embodiment discloses an energy recovery device, which mainly includes a cylinder 1, wherein a pressure applying liquid inlet 17, a pressure applying liquid outlet 19, a pressure fluid outlet 18, and a pressure fluid inlet 20 are sequentially arranged on a side wall of the cylinder 1 from top to bottom; wherein, the pressure liquid inlet 17 and the pressure liquid outlet 18 are arranged on one side of the cylinder body 1, and the pressure liquid outlet 19 and the pressure liquid inlet 20 are arranged on the other side of the cylinder body 1.

An upper cylinder stop block 2, an upper cylinder end cover 3, an upper fixing plate 16, a plunger guide pipe 4, a first sleeve 5, a plunger 6, a first fixing plate 7, a second sleeve 8, a second fixing plate 9, a third sleeve 10, a third fixing plate 11, a fourth sleeve 12, a lower fixing plate 13, a lower cylinder stop block 14, a sliding ball head 15, a swash plate 21 and a lower cylinder end cover 31 are mainly arranged in an inner cavity of the cylinder 1.

The upper end and the lower end of the inner cavity of the barrel body 1 are respectively provided with an annular stop block groove, the annular stop block groove at the upper end is used for installing a stop block 2 on the barrel body, the annular stop block groove at the lower end is used for installing a lower stop block 14 on the barrel body, and the upper stop block 2 and the lower stop block 14 on the barrel body are of split structures. The cylinder upper stop block 2 is fixed with the cylinder upper end cover 3 at the lower part of the cylinder upper stop block through a bolt, and the cylinder lower stop block 14 is fixed with the cylinder lower end cover 31 at the upper part of the cylinder lower stop block through a bolt. The cylinder body lower end cover 31 is sealed with the inner cavity of the cylinder body 1 through an O-shaped ring arranged in the circumferential direction of the cylinder body lower end cover.

An upper fixing plate 16 and a lower fixing plate 13 are arranged between the cylinder upper end cover 3 and the cylinder lower end cover 31. The upper fixing plate 16 is tightly attached to the lower part of the upper end cover 3 of the cylinder body and limited by the upper end cover 3 of the cylinder body; the lower fixing plate 13 is positioned in the inner cavity of the cylinder body 1 and is limited by a step surface formed by reducing the diameter of the lower part of the inner cavity of the cylinder body 1. A plunger guide tube 4 is installed between the upper fixing plate 16 and the lower fixing plate 13. Three step holes are uniformly distributed on the upper fixing plate 16 in a concentric circle, and the diameter of the lower end of each step hole is increased; three step holes are uniformly distributed on the concentric circle of the lower fixing plate 13, and the diameter of the upper end of each step hole is increased. The upper ends of the three plunger guide pipes 4 with the same structure are respectively and correspondingly arranged on the diameter expanding parts in the step holes of the upper fixing plate 16, and the sealing is realized by the O-shaped rings arranged on the outer circumference of the upper ends of the plunger guide pipes 4 and the upper fixing plate 16. The stepped hole of the upper fixing plate 16 also serves to satisfy a distance required for the plunger 6 to travel in a reciprocating motion. The lower ends of the three identical plunger guide pipes 4 are respectively and correspondingly arranged on the diameter expanding parts in the step holes of the lower fixing plate 13, and the sealing is realized between the plunger guide pipes 4 and the lower fixing plate 13 through O-shaped rings arranged on the outer circumference of the lower ends of the plunger guide pipes. The plunger guide pipes 4 are uniformly distributed on the circumference by taking the axis of the cylinder 1 as a symmetrical center line, and the number of the plunger guide pipes 4 is an integer ranging from 2 to 20.

As shown in fig. 2(a) and 2(b), the same position of each plunger conduit 4 is provided with a pressure fluid inlet window 4-1, a pressure fluid outlet window 4-2, a pressure fluid outlet window 4-3 and a pressure fluid inlet window 4-4 from top to bottom in sequence, and the pressure fluid inlet window 4-1, the pressure fluid outlet window 4-2, the pressure fluid outlet window 4-3 and the pressure fluid inlet window 4-4 are symmetrically arranged on the side wall of the plunger conduit 4. An upper sealing area 4-5 is arranged between the pressure liquid inflow window 4-1 and the pressure liquid outflow window 4-2, and a lower sealing area 4-6 is arranged between the pressure liquid outflow window 4-3 and the pressure liquid inflow window 4-4. The heights of the openings of the pressure liquid inflow window 4-1, the pressure liquid outflow window 4-2, the pressure liquid outflow window 4-3 and the pressure liquid inflow window 4-4 of the three plunger conduits 4 are all equal; the heights of the upper sealing zones 4-5 and the lower sealing zones 4-6 of the three plunger ducts 4 are also all equal.

The three same plungers 6 are correspondingly arranged in the three plunger guide pipes 4 one by one, the plungers 6 are in sliding fit with the plunger guide pipes 4, and the plungers 6 can reciprocate up and down in the plunger guide pipes 4. As shown in fig. 3(a) and 3(b), the plunger 6 is a hollow structure with a closed top end and a closed bottom end, and an upper flow window 6-1 and a lower flow window 6-2 are respectively arranged at the upper part and the lower part of the hollow structure. When the upper flow-through window 6-1 of the plunger 6 is moved into communication with the pressurized liquid inflow window 4-1 of the plunger guide 4, the lower flow-through window 6-2 of the plunger 6 is communicated with the pressurized liquid outflow window 4-3 of the plunger guide 4; when the upper flow-through window 6-1 of the plunger 6 moves to the upper sealing area 4-5 of the plunger guide 4, the lower flow-through window 6-2 of the plunger 6 moves to the lower sealing area 4-6 of the plunger guide 4; when the upper flow-through window 6-1 of the plunger 6 is moved into communication with the pressurized liquid outflow window 4-2 of the plunger guide 4, the lower flow-through window 6-2 of the plunger 6 communicates with the pressurized liquid inflow window (4-4) of the plunger guide 4. Therefore, the upper flow window 6-1 and the lower flow window 6-2 of the plunger 6 are alternatively communicated with the pressure liquid inlet window 4-1, the pressure liquid outlet window 4-2, the pressure liquid outlet window 4-3 and the pressure liquid inlet window 4-4 on the plunger guide pipe 4 through the up-and-down reciprocating motion of the plunger 6.

And wear-resistant sealing composite layers are arranged on the upper part of the upper circulation window 6-1, the lower part of the lower circulation window 6-2 and the part between the upper circulation window 6-1 and the lower circulation window 6-2 of the plunger 6, so that the plunger and the plunger guide pipe 4 form a sliding fit sealing relationship. As shown in fig. 5, when the upper flow-through window 6-1 of the # 2 plunger 6 is communicated with the pressure fluid inlet window 4-1 of the plunger tube 4 corresponding thereto, the lower flow-through window 6-2 thereof is communicated with the pressure fluid outlet window 4-3 of the plunger tube 4 corresponding thereto, and the pressure fluid outlet window 4-2 and the pressure fluid inlet window 4-4 of the plunger tube 4 corresponding to the # 2 plunger 6 are sealed by the plunger 6; when the upper flow window 6-1 of the No. 1 plunger 6 enters the upper sealing area 4-5 of the plunger guide pipe 4 corresponding to the upper flow window, the lower flow window 6-2 of the plunger 6 enters the lower sealing area 4-6 of the plunger guide pipe 4 corresponding to the lower flow window, and the pressure liquid inlet window 4-1, the pressure liquid outlet window 4-2, the pressure liquid outlet window 4-3 and the pressure liquid inlet window 4-4 of the plunger guide pipe 4 corresponding to the No. 1 plunger 6 are sealed by the plunger 6; when the upper flow window 6-1 of the 3# plunger 6 is communicated with the pressure liquid outflow window 4-2 of the plunger duct 4 corresponding thereto, the lower flow window 6-2 of the plunger 6 is communicated with the pressure liquid inflow window 4-4 of the plunger duct 4 corresponding thereto, and the pressure liquid inflow window 4-1 and the pressure liquid outflow window 4-3 of the plunger duct 4 corresponding to the 3# plunger 6 are sealed by the plunger 6.

The plunger guide 4 passes through a first fixing plate 7, a second fixing plate 9 and a third fixing plate 11 which support and fix the plunger guide from top to bottom in sequence, and the first fixing plate 7, the second fixing plate 9 and the third fixing plate 11 are arranged at intervals. A first sleeve 5 is arranged between the first fixing plate 7 and the upper fixing plate 16, a second sleeve 8 is arranged between the first fixing plate 7 and the second fixing plate 9, a third sleeve 10 is arranged between the second fixing plate 9 and the third fixing plate 11, and a fourth sleeve 12 is arranged between the third fixing plate 11 and the lower fixing plate 13. The upper end cover 3 and the lower fixing plate 13 of the cylinder are positioned by the upper and lower ends of the upper fixing plate 16, the first sleeve 5, the first fixing plate 7, the second sleeve 8, the second fixing plate 9, the third sleeve 10, the third fixing plate 11 and the fourth sleeve 12.

The first sleeve 5 supports and positions the first fixing plate 7 and the upper fixing plate 16, and a circulation hole communicated with the pressurizing liquid inlet 17 is formed in the circumference of the first sleeve 5. The first fixing plate 7 is sealed with the inner cavity of the cylinder body 1 through an O-shaped ring arranged on the outer circumference of the first fixing plate 7, and a pressure liquid inlet window 4-1 and a pressure liquid outlet window 4-2 on each plunger guide pipe 4 are isolated by the first fixing plate 7 and are sealed with the first fixing plate 7 through the O-shaped ring arranged between the pressure liquid inlet window 4-1 and the pressure liquid outlet window 4-2. A pressurizing liquid inlet chamber 23 is formed among the first fixing plate 7, the upper fixing plate 16 and the first sleeve 5, and the pressurizing liquid inlet chamber 23 is communicated with the pressurizing liquid inlet window 4-1 of the plunger guide 4 and communicated with the pressurizing liquid inlet 17 through the flow hole of the first sleeve 5.

The second sleeve 8 supports and positions the first fixing plate 7 and the second fixing plate 9, and the circumference of the second sleeve 8 is provided with a through hole communicated with the pressure liquid outlet 19. The second fixing plate 9 is sealed with the inner cavity of the cylinder body 1 through an O-shaped ring arranged on the outer circumference of the second fixing plate 9, a pressure liquid outflow window 4-2 and a pressure liquid outflow window 4-3 on each plunger guide pipe 4 are isolated by the second fixing plate 9, and the second fixing plate 9 is sealed through the O-shaped ring arranged between the pressure liquid outflow window 4-2 and the pressure liquid outflow window 4-3. A pressurizing liquid outflow cavity 24 is formed among the second fixing plate 9, the first fixing plate 7 and the second sleeve 8, and the pressurizing liquid outflow cavity 24 is communicated with the pressurizing liquid outflow window 4-2 of the plunger guide 4 and is communicated with the pressurizing liquid outlet 19 through the flow hole of the second sleeve 8.

The third sleeve 10 supports and positions the second fixing plate 9 and the third fixing plate 11, and a circulation hole communicated with the pressurized liquid outlet 18 is formed in the circumference of the third sleeve 10. The third fixing plate 11 is sealed with the inner cavity of the cylinder 1 through an O-shaped ring arranged on the outer circumference of the third fixing plate, and a pressurized liquid outflow window 4-3 and a pressurized liquid inflow window 4-4 on each plunger conduit 4 are isolated by the third fixing plate 11 and sealed with the third fixing plate 11 through the O-shaped ring arranged between the pressurized liquid outflow window 4-3 and the pressurized liquid inflow window 4-4. A pressure fluid outflow chamber 25 is formed among the third fixing plate 11, the second fixing plate 9 and the third sleeve 10, and the pressure fluid outflow chamber 25 communicates with the pressure fluid outflow window 4-3 of the plunger guide 4 and with the pressure fluid outlet 18 through the communication hole of the third sleeve 10.

The fourth sleeve 12 supports and positions the third fixing plate 11 and the lower fixing plate 13, and a circulation hole communicated with the pressurized liquid inlet 20 is formed in the circumference of the fourth sleeve 12. The lower fixing plate 13 is sealed with the inner cavity of the cylinder body 1 through an O-shaped ring arranged on the outer circumference of the lower fixing plate 13, and the pressurized liquid inflow window 4-4 on each plunger conduit 4 and the inner cavity of the cylinder body 1 between the lower fixing plate 13 and the lower end cover 31 of the cylinder body are isolated by the lower fixing plate 13 and are sealed with the lower fixing plate 13 through the O-shaped ring. A pressure fluid inlet chamber 26 is formed among the lower fixing plate 13, the third fixing plate 11 and the fourth sleeve 12, and the pressure fluid inlet chamber 26 communicates with the pressure fluid inlet window 4-4 of the plunger guide 4 and with the pressure fluid inlet port 20 through the communication hole of the fourth sleeve 12.

The lower end of the plunger 6 extends out of the plunger guide pipe 4, a sliding ball head 15 is fixedly installed on the plunger 6, and the sliding ball head 15 is matched with a swash plate 21 below the plunger 6. As shown in fig. 1(a), 4(a) and 4(b), a swash plate 21 is installed in the space of the inner cavity of the cylinder body 1 between the lower fixing plate 13 and the cylinder body lower end cover 31, and the surface of the swash plate 21 is provided with an annular groove 21-1 corresponding to the sliding ball 15. The sliding ball 15 may be placed in the annular groove 21-1 of the surface of the swash plate 21 perpendicularly to the surface thereof and then the plunger 6 is rotated to a vertical state. During the rotation of the swash plate 21, the sliding ball 15 and the annular groove 21-1 on the surface of the swash plate 21 form a sliding fit relationship, and the sliding ball 15 does not separate from the annular groove 21-1 on the surface of the swash plate 21.

The center of the top of the swash plate 21 is provided with a mounting hole for fixing the ball 27, and a fixed ball retainer ring 28 is fixedly mounted in the mounting hole. The ball structure at the bottom end of the fixed ball 27 is arranged in a mounting hole at the center of the top of the swash plate 21 and is in sliding fit with the fixed ball baffle ring 28, and the top end of the fixed ball 27 is connected to the center of the bottom of the lower fixing plate 13 through threads. The fixed ball 27 and the fixed ball retainer 28 are configured to effectively position the swash plate 21 to prevent upward movement of the swash plate 21 during rotation.

The center of the bottom of the swash plate 21 is provided with a main shaft connection hole, and is connected with the main shaft 22 through the main shaft connection hole. The main shaft 22 is mounted to a cylinder lower end cover 31 via a bearing 29 and a bearing cover 30. An external motor drives the rotary swash plate 21 to rotate through the main shaft 22, and the rotary swash plate 21 and the main shaft 22 are positioned and installed through the fixed ball 27, the fixed ball retaining ring 28 and the bearing 29. In addition, a wear-resistant sealing composite layer with a certain height is arranged between the circumferential direction of the swash plate 21 and the inner cavity of the cylinder body 1.

The swash plate 21 drives the plunger 6 to reciprocate through the sliding ball head 15, so that the pressure increasing and releasing processes are synchronous. The inclination angle gamma between the surface of the swash plate 21 and the horizontal plane ranges from 5 to 60 degrees according to the moving stroke of the plunger 6.

It should be noted that the sequence of the pressurized liquid inlet window 4-1, the pressurized liquid outlet window 4-2, the pressurized liquid outlet window 4-3, and the pressurized liquid inlet window 4-4 arranged on the side wall of the plunger guide tube 4 is not limited to the above embodiment. As long as the following conditions are satisfied: the pressure liquid inflow window 4-1 is adjacent to the pressure liquid outflow window 4-2, a sealing area is arranged between the pressure liquid inflow window and the pressure liquid outflow window, and the pressure liquid outflow window 4-3 is adjacent to the pressure liquid inflow window 4-4, and a sealing area is arranged between the pressure liquid inflow window and the pressure liquid inflow window; and the distance between the pressure fluid inflow window 4-1 and the pressure fluid outflow window 4-3 is equal to the distance between the pressure fluid outflow window 4-2 and the pressure fluid inflow window 4-4. The pressure liquid inflow window 4-1, the pressure liquid outflow window 4-2, the pressure liquid outflow window 4-3 and the pressure liquid inflow window 4-4 are respectively in one-to-one correspondence with the pressure liquid inflow cavity 23, the pressure liquid outflow cavity 24, the pressure liquid outflow cavity 25 and the pressure liquid inflow cavity 26, the pressure liquid inflow window 4-1 is always communicated with the pressure liquid inflow cavity 23 and the pressure liquid inlet 17, the pressure liquid outflow window 4-2 is always communicated with the pressure liquid outflow cavity 24 and the pressure liquid outlet 19, the pressure liquid outflow window 4-3 is always communicated with the pressure liquid outflow cavity 25 and the pressure liquid outlet 18, and the pressure liquid inflow window 4-4 is always communicated with the pressure liquid inflow cavity 26 and the pressure liquid inlet 20. That is, there are three other arrangements of the pressure liquid inflow chamber 23, the pressure liquid outflow chamber 24, the pressure liquid outflow chamber 25, and the pressure liquid inflow chamber 26, in addition to the arrangement order shown in the above-described embodiment and the drawings.

The utility model discloses an energy recuperation device's working process as follows:

in the working state shown in fig. 5, the pressurizing liquid flows in from the pressurizing liquid inlet 17, sequentially flows through the circulation hole on the circumference of the first sleeve 5, the pressurizing liquid inlet chamber 23, the pressurizing liquid inlet window 4-1 of the plunger conduit 4 and the upper circulation window 6-1 of the # 2 plunger 6, enters the hollow chamber of the # 2 plunger 6, performs pressure exchange on the pressurizing liquid pre-filled in the hollow chamber of the # 2 plunger 6, and the pressurized liquid after pressure exchange becomes high-pressure liquid; the high-pressure liquid enters the pressure liquid outflow cavity 25 through the lower flowing window 6-2 of the No. 2 plunger 6 and the pressure liquid outflow window 4-3 of the plunger guide pipe 4 in sequence, and then is discharged out of the device through the flowing holes on the circumference of the third sleeve 10 and the pressure liquid outlet 18, and the pressurizing process is carried out.

Meanwhile, the pressurized liquid flows in from the pressurized liquid inlet 20, sequentially flows through the circulation hole on the circumference of the fourth sleeve 12, the pressurized liquid inlet chamber 26, the pressurized liquid inlet window 4-4 of the plunger conduit 4 and the lower circulation window 6-2 of the 3# plunger 6, enters the hollow cavity of the 3# plunger 6, the pressurized liquid decompressed in the hollow cavity of the 3# plunger 6 sequentially flows through the upper circulation window 6-1 of the 3# plunger 6 and the pressurized liquid outlet window 4-2 of the plunger conduit 4, enters the pressurized liquid outlet chamber 24, and then passes through the circulation hole on the circumference of the second sleeve 8 and the pressurized liquid outlet 19 to be discharged, so that the decompression process is realized.

Meanwhile, the upper flow-through window 6-1 of the No. 1 plunger 6 is positioned in the upper sealing area 4-5 of the plunger guide pipe 4, and the lower flow-through window 6-2 of the No. 1 plunger 6 is positioned in the lower sealing area 4-6 of the plunger guide pipe 4, which is a sealing interval stage.

The swash plate 21 rotates one turn, and each plunger 6 will sequentially perform 1 pressurization phase, 1 sealing interval phase, 1 pressure relief phase and 1 sealing interval phase. The phase difference of the three plungers 6 is 120 degrees, which can ensure that at any moment, at least one plunger 6 is in a pressurization stage, and one plunger 6 is in a pressure relief stage, so that the pressure of the pressurized liquid can be continuously recycled, and pressure holding or cut-off can not occur.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various changes without departing from the spirit and the scope of the invention as claimed.

Claims

1. An energy recovery device comprises a cylinder body (1), and is characterized in that n plunger conduits (4) with the same structure and uniformly distributed concentric circles are arranged in an inner cavity of the cylinder body (1), the upper end and the lower end of each plunger conduit (4) are fixed in the inner cavity of the cylinder body (1), pressure liquid inflow windows (4-1), pressure liquid outflow windows (4-2), pressure liquid outflow windows (4-3) and pressure liquid inflow windows (4-4) are arranged on the side walls of the plunger conduits (4) at different heights, wherein the pressurizing liquid inflow window (4-1) is adjacent to the pressurizing liquid outflow window (4-2) and a sealing area is arranged between the pressurizing liquid inflow window and the pressurizing liquid outflow window, wherein the pressurized fluid outflow window (4-3) is adjacent to the pressurized fluid inflow window (4-4) with a sealing area arranged therebetween;

2. The energy recovery device of claim 1, wherein an upper fixing plate (16) and a lower fixing plate (13) are fixedly arranged in the inner cavity of the cylinder body (1), and the upper fixing plate (16) and the lower fixing plate (13) respectively form a seal with the cylinder body (1); the upper end of the plunger guide pipe (4) is arranged in a step hole of the upper fixing plate (16), the lower end of the plunger guide pipe is arranged in a step hole of the lower fixing plate (13), and the plunger guide pipe (4) forms sealing with the upper fixing plate (16) and the lower fixing plate (13) respectively; a first fixing plate (7), a second fixing plate (9) and a third fixing plate (11) are sequentially arranged between the upper fixing plate (16) and the lower fixing plate (13) from top to bottom, the first fixing plate (7), the second fixing plate (9) and the third fixing plate (11) form sealing with the cylinder body (1), and the first fixing plate (7), the second fixing plate (9) and the third fixing plate (11) enable the plunger guide pipe (4) to penetrate through and form sealing with the plunger guide pipe;

3. An energy recovery device according to claim 2, characterized in that a fixed ball (27) is installed between the lower fixing plate (13) and the swash plate (21), the top of the fixed ball (27) is fixedly connected to the center of the lower fixing plate (13), and a ball structure at the bottom of the fixed ball (27) is in sliding fit with a fixed ball retaining ring (28) fixedly installed at the top center of the swash plate (21).

4. An energy recovery device according to claim 1, characterized in that a main shaft (22) is connected to the center of the bottom of the swash plate (21), the main shaft (22) is mounted to a cylinder bottom cover (31) through a bearing (29) and a bearing cover (30), and the cylinder bottom cover (31) is fixed to the cylinder (1) and disposed below the swash plate (21).

5. An energy recovery device according to claim 1, characterized in that the openings of said pressurizing liquid inlet window (4-1), said pressurizing liquid outlet window (4-2), said pressurized liquid outlet window (4-3) and said pressurized liquid inlet window (4-4) are of equal height; the sealing area between the pressure liquid inflow window (4-1) and the pressure liquid outflow window (4-2) is equal in height to the sealing area between the pressure liquid outflow window (4-3) and the pressure liquid inflow window (4-4).

6. An energy recovery device according to claim 1, characterized in that the plunger (6) is provided with a wear resistant sealing composite layer in the upper part of the upper flow-through window (6-1), in the lower part of the lower flow-through window (6-2) and between the upper flow-through window (6-1) and the lower flow-through window (6-2).

7. An energy recovery device, according to claim 1, characterized in that the centre line of symmetry of the n plunger ducts (4), the axis of the swash plate (21) and the axis of the cylinder (1) are all collinear.

8. An energy recovery device, according to claim 1, characterized in that said value of n is an integer ranging from 2 to 20.

9. An energy recovery device according to claim 1, characterized in that a wear-resistant sealing composite layer is provided between the circumference of the swash plate (21) and the inner cavity of the cylinder (1).

10. An energy recovery device according to claim 1, characterized in that the angle of inclination between the surface of the swash plate (21) and the horizontal is in the range of 5-60 degrees.