CN110778474B - Radial piston type fluid pump capable of recycling pressure energy in waste fluid - Google Patents
Radial piston type fluid pump capable of recycling pressure energy in waste fluid Download PDFInfo
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- CN110778474B CN110778474B CN201911150816.1A CN201911150816A CN110778474B CN 110778474 B CN110778474 B CN 110778474B CN 201911150816 A CN201911150816 A CN 201911150816A CN 110778474 B CN110778474 B CN 110778474B
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- flow distribution
- piston
- fluid
- waste fluid
- waist opening
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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
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/047—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders
- F04B1/0474—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders with two or more serially arranged radial piston-cylinder units
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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
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0408—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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
- F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
A radial piston fluid pump for recovering pressure energy from waste fluid includes a cylinder assembly, a rotating assembly, a piston assembly and a flow distribution assembly. The flow distribution shaft is provided with an annular groove, a flow distribution waist opening, a pressure balance groove and a related auxiliary circular hole flow passage; when the piston and the piston rod are retracted, the rod cavity enters waste fluid containing certain energy, and the rodless cavity extrudes useful fluid; when the piston and piston rod extend outward, the rod cavity discharges the waste fluid with recovered energy, and the rodless cavity sucks in low-pressure useful fluid. The advantages are that: when the useful fluid in the rodless cavity needs to be pressurized, the pressure energy in the waste fluid in the rod cavity and the external force work together, so that the input power of the motor can be greatly reduced, the pressurization of the useful fluid is realized, the energy recovery is realized, and the cost is saved.
Description
Technical Field
The invention relates to the field of fluid transmission and control, in particular to a radial piston type fluid pump capable of recovering pressure energy in waste fluid.
Background
The energy is used as a foundation stone and the root of social production development, and the consumption rate of the energy is an important index for measuring economic benefits. With the rapid development of society, the consumption and demand of energy are increasing day by day. The solution to the energy crisis becomes important, and the solution mainly has two approaches: firstly, new energy is developed to replace the traditional energy; secondly, energy is saved and the utilization rate of the energy is enhanced.
China has rich water resources, but people are few, and the demand for fresh water is very large due to large population. In the seawater desalination engineering of China, a large amount of waste concentrated seawater with certain pressure energy can be generated, and if a factory cannot fully utilize the waste concentrated seawater, the waste of energy in waste fluid can be caused. Not only increases the manufacturing cost of the fresh water and reduces the production efficiency, but also influences the service life and the utilization rate of the seawater desalination equipment.
The crankshaft five-star wheel piston pump capable of utilizing the pressure energy in the waste fluid greatly prolongs the service life of using equipment and reduces the production cost, and is characterized in that the energy in the waste fluid can be well recycled in the process of pressurizing the fluid to be treated, and the waste fluid containing a certain pressure energy and an external force are used for pressurizing the fluid to be treated together, so that the input of the external force can be greatly reduced, the energy is saved, the consumption is reduced, and good economic benefits are brought to factories.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the radial piston type fluid pump capable of recovering the pressure energy in the waste fluid by utilizing the pressure energy in the waste fluid, and the fluid pump can reuse the energy in the waste fluid to realize the functions of pressurizing the useful fluid and recovering the energy in the waste fluid simultaneously, thereby greatly saving the production cost.
The technical scheme adopted by the invention is as follows:
the invention provides a radial piston type fluid pump capable of recovering pressure energy in waste fluid, which comprises a cylinder body assembly: the cylinder body assembly comprises a cylinder body, an upper end cover, a lower end cover, a useful fluid suction and discharge channel and a waste fluid suction and discharge channel, wherein piston holes are radially arranged at a certain interval, the upper end cover and the lower end cover are respectively fixed on the upper side and the lower side of the cylinder body, the useful fluid suction and discharge channel and the waste fluid suction and discharge channel are respectively arranged on two sides of the upper surface of each piston hole and are respectively communicated with the piston holes, and a useful fluid diversion channel and a waste fluid diversion channel are respectively communicated with the useful fluid suction and discharge channel and the waste fluid suction and discharge channel; and a transmission assembly: the transmission assembly comprises a crankshaft arranged at the axis of the cylinder body assembly and a connecting rod, one end of the connecting rod is connected to the outer side of the circumference of the crankshaft eccentric wheel through a clamp spring, and the connecting rod corresponds to the piston hole; and a piston assembly: the piston assembly comprises a piston and a piston rod which are arranged in a piston hole, and a guide sleeve for sealing the piston hole, the piston divides the piston hole into a rodless cavity and a rod cavity, the rodless cavity is communicated with a useful fluid suction and discharge channel, the rod cavity is communicated with a waste fluid suction and discharge channel, one end of the piston rod is connected with the piston, and the other end of the piston rod is connected with a connecting rod; and a flow distribution assembly: the flow distribution assembly comprises a flow distribution shaft arranged at the top of the crankshaft, the bottom area of the flow distribution shaft is respectively provided with a flow distribution waist opening communicated with the useful fluid flow guide channel and the waste fluid flow guide channel, the middle area of the flow distribution shaft is provided with an annular groove, and auxiliary circular hole flow channels are uniformly distributed in the axial direction of the flow distribution shaft and are used for connecting the flow distribution waist opening and the annular groove.
The connecting rod is connected with the ball socket through the ball head and is limited through the clamping ring.
And bearings are arranged at the joints of the upper end cover and the lower end cover with the crankshaft.
And pressure balance grooves are arranged at two ends of the flow distribution shaft.
Compared with the prior art, the invention has the following beneficial effects:
1. the shaft flow distribution sealing performance is good, and the complete dynamic balance is achieved by adjusting the distribution diameter, the width and the axial position of the balance groove;
2. the structure is simple, so that the assembly manufacturability is greatly enhanced, and the operation is reliable;
3. the modularized design is adopted, so that the installation, debugging and maintenance are convenient;
4. can be widely applied to various useful fluid pressurizing devices such as poisonous and harmful gas, sewage, seawater desalination and the like in various devices adopting fluid transmission and control technology;
5. the size of the released pressure energy is controlled by changing the diameter ratio of the piston and the piston rod, so that the size of the external force input by the prime motor is controlled, and the energy recovery efficiency is controlled;
6. when the useful fluid is pressurized, the energy recovery of the waste fluid is realized by utilizing the combined action of the external force and the pressure energy in the waste fluid, the energy consumption is reduced, and the economic benefit of a factory is improved.
Drawings
FIG. 1 is a schematic diagram of the overall configuration of one embodiment of a radial piston fluid pump for recovering pressure energy from waste fluid;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 is a schematic cross-sectional view of FIG. 1;
FIG. 4 is a schematic cross-sectional view of FIG. 2;
FIG. 5 is a schematic structural view of the port shaft of FIG. 3;
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
It should be noted that in the description of the present invention, it should be noted that the terms "upper", "lower", "top", "bottom", "one side", "the other side", etc. indicate the orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, and do not mean that a device or an element must have a specific orientation, be configured and operated in a specific orientation.
Referring to fig. 1-4, two figures show the specific structure of an embodiment of a radial piston fluid pump for recovering pressure energy from waste fluid according to the present invention. The radial piston fluid pump comprises a cylinder assembly 1, a transmission assembly 2, a piston assembly 3 and a flow distribution assembly 4.
In this embodiment, the cylinder assembly 1 includes a disc cylinder 11, five sets of radial piston holes 12 uniformly arranged at a certain distance are provided on the outer side of the circumference of the disc cylinder 11, an upper end cover 13 and a lower end cover 14 coaxial with the disc cylinder 11 are fixed on the upper and lower sides of the disc cylinder 11, a useful fluid suction and discharge channel b and a waste fluid suction and discharge channel a communicated with the piston hole 12 are respectively provided on the two sides of the upper surface of the piston hole 12, a process hole plug 15 is installed at the tail end of the waste fluid suction and discharge channel a, and a useful fluid guide channel b1 and a waste fluid guide channel a1 communicated with the useful fluid suction and discharge channel b and the waste fluid suction and discharge channel a are respectively provided in the upper end cover 13; the transmission assembly 2 comprises a crankshaft 21 and connecting rods 24, wherein the crankshaft 21 and the connecting rods 24 are arranged at the coaxial positions of the disc-shaped cylinder body 11, the upper end cover 13 and the lower end cover 14, the rear end parts of the crankshaft 21 are limited at the outer side of the circumference of a crankshaft eccentric wheel 22 through snap springs 23 and correspond to the piston holes 12 one by one, one ends of the connecting rods 24, which are contacted with the eccentric wheel 22, are provided with arc grooves for containing the snap springs 23, the bottom surfaces of the connecting rods 24 are cylindrical curved surfaces, the snap springs, the cylindrical curved surfaces and the eccentric wheel are arranged concentrically, and bearings 25 are arranged between the connection positions of the upper end cover 13 and the lower end cover 14, so that the crankshaft 21 is smoother in rotation, and the friction resistance generated in the rotation process is reduced; the piston assembly 3 comprises a piston 31 arranged in the piston hole 12 and a piston rod 32 arranged in the middle of one side, facing the transmission assembly 2, of the piston 31, a guide sleeve 33 used for sealing the piston hole 12 is fixed between the piston rod 32 and the end part of the piston hole 12, the piston hole 12 is divided into a rodless cavity and a rod cavity by the piston 31, the rodless cavity is communicated with a useful fluid suction and discharge channel b, the rod cavity is communicated with a waste fluid suction and discharge channel a, and the other end of the piston rod 32 is connected with the connecting rod 24.
The bottom end of the piston rod 32 is provided with a ball socket 34 and a clamping ring groove 35, correspondingly, the front end part of the connecting rod 24 is provided with a ball head 26 corresponding to the ball socket 34, the connecting rod 24 is assembled in the ball socket 34 through the ball head 26 in a matching mode, the connecting reliability is guaranteed through the limiting of a clamping ring 27 arranged in the clamping ring groove 35, and the connecting rod 24 is prevented from being separated from the piston rod 32.
The flow distribution assembly 4 comprises a flow distribution shaft 41 arranged at the top of the crankshaft, a cross groove 42 is arranged at one end of the flow distribution shaft 41 connected with the crankshaft 21, a cross protrusion (not shown in the figure) corresponding to the cross groove 42 is arranged at the top end of the crankshaft 21, and the cross groove 42 and the cross protrusion are matched to form a cross coupling, so that the flow distribution shaft 41 and the crankshaft 21 synchronously rotate; in the embodiment, one side of the bottom area of the flow distribution shaft 41 is provided with a flow distribution waist opening b2 and a flow distribution waist opening b3 for discharging and sucking useful fluid, the other side of the bottom of the flow distribution shaft 41 is provided with a flow distribution waist opening a3 and a flow distribution waist opening a2 for discharging and sucking waste fluid, and the flow distribution waist opening b2, the flow distribution waist opening b3, the flow distribution waist opening a2 and the flow distribution waist opening a3 are periodically communicated with the flow guide channel b1 and the flow guide channel a 1; four groups of annular grooves c, d, e and f at certain intervals are uniformly formed in the middle area of the flow distribution shaft 41 and are communicated with the outside, wherein the annular groove c is used for a high-pressure useful fluid channel, the annular groove d is used for a high-pressure waste fluid channel, the annular groove e is used for sucking a useful fluid channel, the annular groove f is used for discharging a waste fluid channel after working, and four groups of auxiliary circular hole flow passages c1, d1, e1 and f1 are uniformly distributed in the axial direction of the flow distribution shaft and are respectively communicated with a flow distribution waist opening and one group of annular grooves; the two ends of the flow distribution shaft 41 are respectively provided with a pressure balance groove g1 and a pressure balance groove g2, g1 is communicated with the annular groove c to be connected with high-pressure useful fluid, g2 is communicated with the annular groove d to be connected with high-pressure waste fluid, and the diameter, the width and the axial position of g1 and g2 are adjusted to enable the flow distribution shaft 41 to achieve complete dynamic balance.
The crankshaft 21 is driven by a motor to rotate, under the guarantee of a clamp spring 23 and a connecting rod 24, two (or three) piston assemblies 3 retract under the action of waste fluid pressure and an eccentric wheel 22 to compress useful fluid, wherein the waste fluid with pressure energy enters a flow distribution waist opening a2 from the outside through an annular groove d and a round hole flow passage d1 on a flow distribution shaft 41, then enters a piston rod cavity through a flow guide passage a1 and a waste fluid suction and discharge passage a, and the compressed useful fluid enters a flow distribution waist opening b2 on the flow distribution shaft 41 through a useful fluid suction and discharge passage b and a flow guide passage b1, then flows through a round hole flow passage c1 and enters an annular groove c to be extruded to the outside; three (or two) piston assemblies 3 extend out under the action of a connecting rod 24, a clamp spring 23 and an eccentric wheel 22, suck in useful fluid and discharge the fluid after doing work, wherein the sucked useful fluid enters a flow distribution waist opening b3 through an annular groove e and a round hole flow passage e1 on a flow distribution shaft 41 and enters a piston rodless cavity through a flow guide passage b1 and a useful fluid suction and discharge passage b; the waste fluid after acting enters a flow guide channel a1 from the rod cavity through a waste fluid suction and discharge channel a, enters a flow distribution waist opening a3 on the flow distribution shaft 41, enters the annular groove f through the circular hole flow channel f1 and is discharged to the outside, and thus, a working cycle is completed.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (3)
1. A radial piston fluid pump for recovering pressure energy from a waste fluid, comprising: the fluid pump comprises
A cylinder body assembly: the cylinder body assembly comprises a cylinder body, an upper end cover, a lower end cover, a useful fluid suction and discharge channel and a waste fluid suction and discharge channel, wherein piston holes are radially arranged at a certain interval, the upper end cover and the lower end cover are respectively fixed on the upper side and the lower side of the cylinder body, the useful fluid suction and discharge channel and the waste fluid suction and discharge channel are respectively arranged on two sides of the upper surface of each piston hole and are respectively communicated with the piston holes, and a useful fluid diversion channel and a waste fluid diversion channel are respectively communicated with the useful fluid suction and discharge channel and the waste fluid suction and discharge channel; and
the transmission assembly is as follows: the transmission assembly comprises a crankshaft arranged at the axis of the cylinder body assembly and a connecting rod, one end of the connecting rod is connected to the outer side of the circumference of the crankshaft eccentric wheel through a clamp spring, and the connecting rod corresponds to the piston hole; and
a piston assembly: the piston assembly comprises a piston and a piston rod which are arranged in a piston hole, and a guide sleeve for sealing the piston hole, the piston divides the piston hole into a rodless cavity and a rod cavity, the rodless cavity is communicated with a useful fluid suction and discharge channel, the rod cavity is communicated with a waste fluid suction and discharge channel, one end of the piston rod is connected with the piston, and the other end of the piston rod is connected with a connecting rod; and
a flow distribution assembly: the flow distribution assembly comprises a flow distribution shaft arranged at the top of the crankshaft, the bottom area of the flow distribution shaft is respectively provided with a flow distribution waist opening communicated with the useful fluid flow guide channel and the waste fluid flow guide channel, the middle area of the flow distribution shaft is provided with an annular groove, and auxiliary circular hole flow channels are uniformly distributed in the axial direction of the flow distribution shaft and are used for connecting the flow distribution waist opening and the annular groove;
two ends of the flow distribution shaft are provided with pressure balance grooves;
a flow distribution waist opening b2 and a flow distribution waist opening b3 for discharging and sucking useful fluid are arranged on one side of the bottom area of the flow distribution shaft, a flow distribution waist opening a3 and a flow distribution waist opening a2 for discharging and sucking waste fluid are arranged on the other side of the bottom of the flow distribution shaft, and the flow distribution waist opening b2, the flow distribution waist opening b3, the flow distribution waist opening a2 and the flow distribution waist opening a3 are periodically communicated with a useful fluid diversion channel and a waste fluid diversion channel; four groups of annular grooves c, d, e and f which are spaced at certain intervals are uniformly formed in the middle area of the flow distribution shaft and are communicated with the outside, wherein the annular groove c is used for a high-pressure useful fluid channel, the annular groove d is used for a high-pressure waste fluid channel, the annular groove e is used for sucking a useful fluid channel, and the annular groove f is used for discharging a waste fluid channel after work is done; four groups of auxiliary circular hole runners of c1, d1, e1 and f1 are axially and uniformly distributed on the flow distribution shaft and are respectively communicated with a flow distribution waist opening and a group of annular grooves; the two ends of the flow distribution shaft are respectively provided with a pressure balance groove g1 and a pressure balance groove g2, the pressure balance groove g1 is communicated with the annular groove c to be connected with high-pressure useful fluid, the pressure balance groove g2 is communicated with the annular groove d to be connected with high-pressure waste fluid, and the diameter, the width and the axial position of the pressure balance groove g1 and the pressure balance groove g2 are adjusted to enable the flow distribution shaft to achieve complete dynamic balance.
2. A radial piston fluid pump for recovering pressure energy from waste fluid as claimed in claim 1, wherein: the connecting rod is connected with the ball socket through the ball head and is limited through the clamping ring.
3. A radial piston fluid pump for recovering pressure energy from waste fluid as claimed in claim 1, wherein: and bearings are arranged at the joints of the upper end cover and the lower end cover with the crankshaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911150816.1A CN110778474B (en) | 2019-11-21 | 2019-11-21 | Radial piston type fluid pump capable of recycling pressure energy in waste fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911150816.1A CN110778474B (en) | 2019-11-21 | 2019-11-21 | Radial piston type fluid pump capable of recycling pressure energy in waste fluid |
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| Publication Number | Publication Date |
|---|---|
| CN110778474A CN110778474A (en) | 2020-02-11 |
| CN110778474B true CN110778474B (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911150816.1A Active CN110778474B (en) | 2019-11-21 | 2019-11-21 | Radial piston type fluid pump capable of recycling pressure energy in waste fluid |
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| CN (1) | CN110778474B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255651A (en) * | 2020-03-02 | 2020-06-09 | 韩国昊 | Air compressor |
| CN111306025A (en) * | 2020-03-06 | 2020-06-19 | 邵玉刚 | Submersible pump |
| CN111271237A (en) * | 2020-03-06 | 2020-06-12 | 邵玉刚 | Water pump |
| CN111520303B (en) * | 2020-06-01 | 2024-03-22 | 江苏天健液压科技有限公司 | Pressure energy recovery device |
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| US5573386A (en) * | 1994-01-29 | 1996-11-12 | Robert Bosch Gmbh | Reciprocating piston pump |
| CN201696210U (en) * | 2010-04-20 | 2011-01-05 | 董健康 | Novel low-speed large-torque plunger motor |
| CN104791214A (en) * | 2015-04-22 | 2015-07-22 | 秦皇岛永纯洁海水淡化技术工程有限公司 | Volumetric fluid pump allowing waste fluid energy to be used |
| CN105275734A (en) * | 2015-11-16 | 2016-01-27 | 宁波汉竹液压马达有限公司 | Axial-oil-distribution tilt cylinder plunger type hydraulic motor |
| CN109083821A (en) * | 2018-07-23 | 2018-12-25 | 江苏大学 | A kind of crankshaft connecting rod type wind energy suction function pump |
| CN209041019U (en) * | 2018-11-13 | 2019-06-28 | 宁波欧易液压有限公司 | Hydraulic motor with oil distribution shaft structure |
-
2019
- 2019-11-21 CN CN201911150816.1A patent/CN110778474B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5573386A (en) * | 1994-01-29 | 1996-11-12 | Robert Bosch Gmbh | Reciprocating piston pump |
| CN201696210U (en) * | 2010-04-20 | 2011-01-05 | 董健康 | Novel low-speed large-torque plunger motor |
| CN104791214A (en) * | 2015-04-22 | 2015-07-22 | 秦皇岛永纯洁海水淡化技术工程有限公司 | Volumetric fluid pump allowing waste fluid energy to be used |
| CN105275734A (en) * | 2015-11-16 | 2016-01-27 | 宁波汉竹液压马达有限公司 | Axial-oil-distribution tilt cylinder plunger type hydraulic motor |
| CN109083821A (en) * | 2018-07-23 | 2018-12-25 | 江苏大学 | A kind of crankshaft connecting rod type wind energy suction function pump |
| CN209041019U (en) * | 2018-11-13 | 2019-06-28 | 宁波欧易液压有限公司 | Hydraulic motor with oil distribution shaft structure |
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| CN110778474A (en) | 2020-02-11 |
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