Kinetic energy output method and device based on hydraulic pressure

Abstract

The invention discloses a kinetic energy output method and device based on hydraulic pressure, and the core of the technical scheme is an equal-volume differential composite cavity hydraulic driving module which comprises a double-acting double-rod hydraulic cylinder, a double-rod hydraulic cylinder and a single-rod hydraulic cylinder, piston rods at the left end and the right end of the double-acting double-rod hydraulic cylinder are fixedly connected with piston rods of the other two hydraulic cylinders respectively, the fixed connection positions are always located in the auxiliary cylinder barrel in the back-and-forth stroke, a gap is formed between the large piston rod and the inner wall of the auxiliary cylinder barrel, and near-end hydraulic cylinder cavities on the left side and the right side of the main cylinder form two equal-volume differential motion composite cavities. When the piston rod moves left and right, the volumes of near-end cavities of the two hydraulic cylinders are equal in increment and decrement, and the total volume of the composite cavity is not changed; the differences between the cross sectional areas of the pistons and the piston rods of the three hydraulic cylinders are equal; the difference between the cross sectional areas of the large and small piston rods is equal to the net area of differential driving force of the composite cavity; hydraulic pressure is circularly switched through the two-position four-way reversing valve, and kinetic energy of the piston rod is differentially driven by the composite cavity to be circularly output.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a method and device for outputting kinetic energy based on hydraulic pressure. Background Art

[0002] With the development of society, new energy technologies such as solar energy, wind energy, and nuclear energy have made rapid progress, and their share of power generation has increased significantly. However, they still face some challenges and difficulties, such as climate impacts, long-distance power transmission, resource limitations, and high investment costs.

[0003] There are some challenges and difficulties, such as climate impact, long-distance power transmission, resource limitations, and high investment costs.

[0004] Liquids have the characteristics of low compression rate, release energy when pressurized, and absorb energy when decompressed. Liquid internal energy output technology is a new energy technology that needs to be further developed and utilized. Hydraulic technology is a technology that uses liquid pressure to transmit power and is widely used in industrial and civil fields. For more than 60 years, hydraulic cylinder differential circuit technology has been used for a long time, mainly for piston rod speed regulation, and its fuel-saving and energy-saving functions are also brought into play. The principle of fuel saving and energy saving is that when the piston rod is extended, the pump only needs to provide a flow rate equal to the difference in the effective area of ​​the two chambers, and the liquid in the rod chamber directly returns to the rodless chamber to achieve the energy-saving function. At present, the application of hydraulic differential circuit technology is basically limited to the functions of traditional forms of actuators, and its energy-saving principle has not been fully developed. There are no reports in the world that the improvement of hydraulic cylinders and the combination of multi-cylinder systems are used as the main technology for new energy development. Summary of the invention

[0005] The present invention application provides a method and device for outputting kinetic energy based on hydraulic pressure. The method and device for outputting kinetic energy driven by equal volume and differential compound cavity hydraulic pressure is a brand-new technology.

[0006] The purpose of the present invention is to output the hydraulic potential energy by isovolumetric, differential compound cavity hydraulic drive to convert the internal energy of the liquid into the kinetic energy of the piston rod. The technical solution adopted is:

[0007] A method and device for outputting kinetic energy based on hydraulic pressure include: a pressure potential energy supply and control module, an isovolumetric and differential compound cavity hydraulic drive module, and a piston rod linear reciprocating motion conversion transmission and kinetic energy output module.

[0008] The equal volume, differential compound cavity hydraulic drive module includes: a double-acting double-rod hydraulic cylinder as the main cylinder, whose piston area is SD1=ΠD1² / 4, the cross-sectional area of ​​the piston rod is Sd1=Πd1² / 4, the area difference S1=SD1-Sd1, and the end covers on both sides are replaced by flanges; a double-rod hydraulic cylinder as the right auxiliary cylinder, whose piston area is SD2=ΠD2² / 4, the cross-sectional area of ​​the piston rod is Sd2=Πd2² / 4, the area difference S2=SD2-Sd2, and the left end cover is replaced by a flange; a single-rod hydraulic cylinder as the left auxiliary cylinder, whose piston area and piston rod cross-sectional area are the same as those of the right auxiliary cylinder, and the right end cover is replaced by a flange, and the aperture of the flanges of the main and auxiliary cylinders is equal to the inner diameter of the auxiliary cylinder barrel, The left and right ends of the piston rod are fixedly connected to the piston rod of the auxiliary cylinder respectively. The fixed connection is always in the cylinder barrel of the auxiliary cylinder during the reciprocating stroke. The length of the auxiliary cylinder chamber on the connecting side is greater than or equal to the design stroke of the main cylinder, while the design stroke of the chamber on the other side of the second auxiliary cylinder is less than the stroke of the main cylinder, which is also the actual working stroke. The chamber is a zero-pressure chamber with a vent. End covers and buffer devices are arranged on the sides of the second auxiliary cylinders, and a guide ring is arranged on the right side; the diameter of the piston rod of the main cylinder is smaller than the inner diameter of the cylinder barrel of the auxiliary cylinder, and the flanges are sealed and fixedly connected; the right chamber of the main cylinder and the left chamber of the right auxiliary cylinder are combined into an equal-volume, differential compound chamber on the right side, and the left chamber of the main cylinder and the right chamber of the left auxiliary cylinder are combined into an equal-volume, differential compound chamber on the left side.

[0009] When the piston rod moves left and right, S1=S2, the increase or decrease in the volume of the proximal chambers of the two hydraulic cylinders in the equal-volume, differential compound cavity is equal, the total volume of the compound cavity remains unchanged, and the net area of ​​the differential driving force of the compound cavity = Sd1-Sd2, which is equal to the difference in area between the large and small piston rods at the connection.

[0010] After the external hydraulic pressure is applied, the pressure of the compound chamber is equal to the external pressure, the pressure of the other compound chamber is equal to the reservoir, the pressure is zero, and the differential pressure drives the connected piston rod to move toward the other compound chamber; each time the differential occurs, the hydraulic potential energy liquid consumption is equal to the total volume of the compound chamber * the liquid compression rate, and the hydraulic potential energy stimulates the internal energy of the liquid to be converted into driving kinetic energy.

[0011] Increase the difference between the piston area of ​​the auxiliary cylinders on both sides and the cross-sectional area of ​​the piston rod. When the increase amplitude multiplied by the working stroke is equal to the total volume of the compound chamber multiplied by the liquid compression rate, the external hydraulic potential energy consumption is zero. Further increase the difference between the cross-sectional area of ​​the pistons and the piston rods of the two small hydraulic cylinders. At the end of a working stroke, the total volume of the compound chamber decreases, and part of the liquid flows back to the hydraulic source through the reversing valve, but the output kinetic energy of the piston rod is also reduced accordingly. When the hydraulic pressure is switched to the other side of the compound chamber, the liquid is replenished from the reservoir through the reversing valve and flows into the compound chamber. The upper limit of the increase amplitude is that the differential force is equal to the friction resistance.

[0012] The pressure potential energy supply and control module is connected to the P port of the two-position four-way reversing valve, with a valve in the middle. The two liquid inlets of the hydraulic cylinder are connected to the A and B ports of the two-position four-way reversing valve through pipelines respectively, and the T port is connected to the liquid reservoir, and the pipeline port is placed below the liquid surface; the two-position four-way reversing valve is switched cyclically, and the equal-volume, differential compound cavity hydraulic drive module outputs kinetic energy in a self-circulating manner; the liquid reservoir can be replaced with a sealed negative hydraulic container to increase the pressure difference between the left and right equal-volume, differential compound cavities and increase the driving force.

[0013] 2 to N groups of equal volume, differential compound cavity hydraulic drives form an equal volume, differential compound cavity collective structure.

[0014] The pressure potential energy supply and control module includes: accumulator, booster, pressure regulating valve, pipeline, sensor, electronic control device; the piston rod linear reciprocating motion conversion transmission and kinetic energy output module includes: several gears, transmission mechanism, speed regulating mechanism, and the external load of the module includes: generator, energy storage device, motor vehicle drive, propeller drive, booster device and local mechanical power demand.

[0015] The present invention has the following advantages:.

[0016] 1. From the perspective of traditional energy, the external energy has a large output-to-investment ratio, and by stimulating the conversion of liquid internal energy, the energy-saving effect is obvious.

[0017] 2. The present invention does not have the difficulties of long-distance power transmission and resource limitation.

[0018] 3. The economic investment in implementing the present invention is small, the technical difficulty is not great, and the operability is strong.

[0019] 4. The present invention has a wide range of application scenarios and is less restricted by natural environment factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the module structure of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the isovolumetric, differential compound cavity hydraulic drive module of the present invention.

[0022] Figure 3 It is a schematic diagram of the output structure of the rack and pinion hydraulic cylinder of the present invention.

[0023] In the figure, 01-double-acting double-rod hydraulic cylinder, 02-piston, 03-piston rod, 04-right liquid inlet, 05-left liquid inlet, 06-flange, 06a-flange, 07-flange, 07a-flange, 08-double-rod hydraulic cylinder, 09-piston, 10-piston rod, 11-single-rod hydraulic cylinder, 12-piston, 13-piston rod, 14-left chamber of master cylinder, 15-right chamber of master cylinder, 16-left chamber of left auxiliary cylinder, 17-right chamber of right auxiliary cylinder, 18-left chamber of right auxiliary cylinder, 19-right chamber of left auxiliary cylinder, 20-vent, 21-end cover, 22-end cover, 23-vent, 24-valve, 25-two-position four-way reversing valve, 26-liquid reservoir, 27-single-rod hydraulic cylinder, 28-hydraulic cylinder, 29-gear, 30-cylinder opening, 31-piston, 32-piston. DETAILED DESCRIPTION

[0024] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. The described examples are only part of the examples of the present application.

[0025] Combination Figure 1-3 , a hydraulic-based kinetic energy output method and device are described in detail, including: a pressure potential energy supply and control module, an isovolumetric, differential compound cavity hydraulic drive module, a piston rod linear reciprocating motion conversion transmission and kinetic energy output module.

[0026] The isovolumetric, differential compound cavity hydraulic drive module includes: a double-acting double-rod hydraulic cylinder 01 as the main cylinder, whose piston 02 area is SD1=ΠD1² / 4, the cross-sectional area of ​​the piston rod 03 is Sd1=Πd1² / 4, S1=SD1-Sd1, and the end covers on both sides are replaced by flanges 06a and 07a; a double-rod hydraulic cylinder 08 as the right auxiliary cylinder, whose piston 09 area is SD2=ΠD2² / 4, the cross-sectional area of ​​the piston rod 10 is Sd2=Πd2² / 4, S2=SD2-Sd2, and the left end cover is replaced by a flange 06 is replaced; a single-rod hydraulic cylinder 11 is the left auxiliary cylinder, and its piston 12 area and piston rod 13 cross-sectional area are the same as those of hydraulic cylinder 08. The right end cover is replaced by flange 07. The aperture of the main and auxiliary cylinder flanges is equal to the inner diameter of the auxiliary cylinder barrel. The left and right ends of the piston rod 03 are fixedly connected to the piston rod 10 and the piston rod 13 respectively. The fixed connection is always in the auxiliary cylinder barrel during the back and forth stroke. The length of the auxiliary cylinder chambers 18 and 19 on the connecting side is greater than or equal to the design stroke of the main cylinder, while the design stroke of the chambers 16 and 17 on the other side of the second auxiliary cylinder is less than the stroke of the main cylinder, which is also the actual Working stroke, the chamber is a zero-pressure chamber with vents 20, 23. End covers 21, 22 and buffer devices are set on the sides of the two auxiliary cylinders, and a guide ring is set on the right side; the diameter of the main cylinder piston rod 03 is smaller than the inner diameter of the auxiliary cylinder barrel, and the flanges 06 and 06a, 07 and 07a are sealed and fixedly connected; the right chamber 15 of the main cylinder and the left chamber 18 of the hydraulic cylinder 08 are combined into the right side equal volume, differential composite chamber, and the left chamber 14 of the main cylinder and the right chamber 19 of the hydraulic cylinder 11 are combined into the left side equal volume, differential composite chamber; when the piston rod moves left and right, S1=S2, equal volume , the increase or decrease in the volume of the proximal chambers of the two hydraulic cylinders in the differential compound cavity is equal, the total volume of the compound cavity remains unchanged, and the net area of ​​the differential driving force of the compound cavity = Sd1-Sd2, which is equal to the area difference between the large and small piston rods at the connection; after the external hydraulic pressure is applied, the pressure of the compound cavity is equal to the external pressure, and the pressure of the other compound cavity is equal to the pressure of the reservoir 26 is zero, and the differential pressure drives the connected piston rod to move toward the other compound cavity; each time the differential is applied, the hydraulic potential energy liquid consumption is equal to the total volume of the compound cavity * the liquid compression rate, and the hydraulic potential energy stimulates the internal energy of the liquid to be converted into driving kinetic energy.

[0027] Increasing the value of the auxiliary cylinder S2 can make the external hydraulic potential energy consumption zero, but the output kinetic energy of the piston rod is also reduced accordingly. The value range of S2 is between 90% and 130% of S1, and d1 is greater than D1*10% and less than D1*99.9%; further increasing the value of S2, at the end of a working stroke, the total volume of the composite chamber decreases, and part of the liquid flows back to the hydraulic source through the reversing valve, but the output kinetic energy of the piston rod is also reduced accordingly. When the hydraulic pressure switches to the other side of the composite chamber, the liquid flows from the reservoir to the composite chamber through the reversing valve. When the liquid reflux increases the pressure of the upstream accumulator, the pressure potential energy supply and control module pressure regulating valve automatically works to adjust the pressure. When the purpose is to increase the pressure, the output kinetic energy of the piston rod must be sacrificed; the upper limit of the increase is that the differential force is equal to the friction resistance; the design strokes of the three hydraulic cylinders can be different, and the working stroke is equal to the smaller value of the three hydraulic cylinders' design working strokes.

[0028] The liquid reservoir 26 can be replaced by a sealed negative hydraulic container to increase the pressure difference between the left and right equal-volume and differential compound cavities, and increase the driving force through cyclic switching of the two-position four-way reversing valve.

[0029] The pressure potential energy supply and control module is connected to the two-position four-way reversing valve 25P port, with a valve 24 placed in the middle. The two liquid inlets 04 and 05 of the hydraulic cylinder 01 are respectively connected to the two-position four-way reversing valve 25A and B ports through pipelines. The T port is connected to the liquid reservoir 26, and the pipeline port is placed below the liquid surface; the two-position four-way reversing valve is switched cyclically, and the equal-volume, differential compound cavity hydraulic drive module self-circulates and outputs kinetic energy.

[0030] The energy-saving principle of the traditional hydraulic differential circuit saves the liquid flow of the piston rod cross-sectional area; the idea of ​​the solution of the present invention is: how to make the saved flow significantly less than or equal to the loading flow, and introduce a second hydraulic cylinder to connect. Compared with the two hydraulic cylinders, the inner diameters of the cylinder barrels are obviously different. The cross-sectional area of ​​the piston rod can be adjusted to achieve equal volume. The piston rods of the main and auxiliary cylinders are connected and fixed and placed in the cylinder barrel of the auxiliary cylinder, which can be pressurized to the tail end of the piston rod to form a differential drive; the equal volume, differential compound cavity hydraulic drive principle and method are the core innovation of the present invention.

[0031] The piston rod linear reciprocating motion conversion transmission and kinetic energy output module is connected to the piston rod 10. The module includes: a number of gears, a transmission mechanism, and a speed regulating mechanism, which transmits the kinetic energy of the piston rod 10 to the external load.

[0032] The piston rod linear reciprocating motion conversion transmission and kinetic energy output module includes: a number of gears, a transmission mechanism, a speed regulating mechanism, and the external loads include: a generator, an energy storage device, a motor vehicle drive, a propeller drive, a supercharging device and local mechanical kinetic energy requirements.

[0033] The pressure potential energy supply and control module includes: an accumulator, a booster, a pressure regulating valve, pipelines, sensors, and electronic control devices.

[0034] The double-acting double-rod hydraulic cylinder 01 can be replaced by a hydraulic cylinder of the gear and rack type (28), which outputs kinetic energy in the middle of the left and right equal-volume and differential compound chambers; the single-rod hydraulic cylinder (11) can be replaced by a double-rod hydraulic cylinder, and the hydraulic drive module of the equal-volume and differential compound chambers outputs kinetic energy on both sides; it is also possible to select the combination of the middle gear-rack hydraulic cylinder and the side to output kinetic energy; the cross-sections of the hydraulic cylinder and the piston rod are not limited to circular shapes.

[0035] Two to N groups of equal-volume and differential compound chamber hydraulic drives form an equal-volume and differential compound chamber combined structure.

[0036] The differences between the piston areas of the two auxiliary cylinders and the cross-sectional areas of the piston rods can be unequal, including the differences in the cylinder barrels and the differences in the piston rods.

[0037] Fix the piston rods output on both sides of the equal-volume and differential compound chamber hydraulic drive module, keep the cylinder moving rods stationary, and install a rack on the cylinder barrel to output kinetic energy.

[0038] Such as Figure 2 , H1 = H2 = H3 = H4, H5 < H4, and the end cover is equipped with a buffer and spring device.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention shall be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method and device for outputting kinetic energy based on hydraulic pressure, comprising: A pressure potential energy supply and control module, an isovolumetric, differential compound cavity hydraulic drive module, a piston rod linear reciprocating motion conversion transmission and kinetic energy output module; characterized in that the isovolumetric, differential compound cavity hydraulic drive module comprises: a double-acting double-rod hydraulic cylinder (01) as a main cylinder, the area of ​​its piston (02) is SD1=ΠD1² / 4, the cross-sectional area of ​​the piston rod (03) is Sd1=Πd1² / 4, S1=SD1-Sd1, and the end covers on both sides are replaced by flanges (06a, 07a) Replacement; a double-rod hydraulic cylinder (08) is the right auxiliary cylinder, the area of ​​its piston (09) is SD2=ΠD2² / 4, the cross-sectional area of ​​the piston rod (10) is Sd2=Πd2² / 4, S2=SD2-Sd2, and the left end cover is replaced by a flange (06); a single-rod hydraulic cylinder (11) is the left auxiliary cylinder, the area of ​​its piston (12) and the cross-sectional area of ​​its piston rod (13) are the same as those of the hydraulic cylinder (08), and the right end cover is replaced by a flange (07), and the apertures of the flanges of the main and auxiliary cylinders are equal to the inner diameter of the auxiliary cylinder barrel, The left and right ends of the piston rod (03) are fixedly connected to the piston rod (10) and the piston rod (13) respectively. The fixed connection is always in the cylinder barrel of the auxiliary cylinder during the reciprocating stroke. The length of the auxiliary cylinder chamber (18, 19) on the connecting side is greater than or equal to the design stroke of the main cylinder, while the design stroke of the chamber (16, 17) on the other side of the second auxiliary cylinder is less than the stroke of the main cylinder, which is also the actual working stroke. The chamber is a zero-pressure chamber with a vent (20, 23). The side of the second auxiliary cylinder is provided with an end cover (21, 22) and a buffer device, and a guide ring is arranged on the right side. The diameter of the piston rod (03) of the main cylinder is smaller than the inner diameter of the cylinder barrel of the auxiliary cylinder. The flanges (06) and (06a), and (07) and (07a) are sealed and fixedly connected. The right side of the main cylinder The chamber (15) and the left chamber (18) of the hydraulic cylinder (08) are combined to form a right-side equal-volume, differential composite chamber, and the left chamber (14) of the master cylinder and the right chamber (19) of the hydraulic cylinder (11) are combined to form a left-side equal-volume, differential composite chamber; when the piston rod moves left and right, S1=S2, the increase and decrease of the volume of the two hydraulic cylinder proximal chambers in the equal-volume, differential composite chamber are equal, the total volume of the composite chamber remains unchanged, and the net area of ​​the differential driving force of the composite chamber = Sd1-Sd2, which is equal to the difference in area between the large and small piston rods at the connection; after the external hydraulic pressure is applied, the pressure of the composite chamber is equal to the external pressure, and the pressure of the other composite chamber is equal to the pressure of the reservoir (26) is zero, and the differential pressure drives the connected piston rod to move in the direction of the other composite chamber; Each time the differential is performed, the consumption of hydraulic potential energy liquid is equal to the total volume of the compound chamber * liquid compression rate. The hydraulic potential energy stimulates the internal energy of the liquid to be converted into driving kinetic energy. By increasing the value of the auxiliary cylinder S2, the consumption of the external hydraulic potential energy can be reduced to zero, but the output kinetic energy of the piston rod will also be reduced accordingly.The value range of S2 is between 90% and 130% of S1, and d1 is greater than D1*10% and less than D1*99.9%; the pressure potential energy supply and control module is connected to the P port of the two-position four-way reversing valve (25), a valve (24) is arranged in the middle, the two liquid inlets (04, 05) of the hydraulic cylinder (01) are respectively connected to the A port and the B port of the two-position four-way reversing valve (25) through pipelines, the T port is connected to the liquid reservoir (26), and the pipeline port is placed below the liquid surface; the two-position four-way reversing valve is cyclically switched, and the equal volume, differential composite cavity hydraulic drive module self-circulates and outputs kinetic energy.

2. A method and device for outputting kinetic energy based on hydraulic pressure according to claim 1, characterized in that: The piston rod linear reciprocating motion conversion transmission and kinetic energy output module is connected to the piston rod (10), and the module comprises: a plurality of gears, a transmission mechanism, and a speed regulating mechanism, and transmits the kinetic energy of the piston rod (10) to an external load.

3. The method and device for outputting kinetic energy based on hydraulic pressure according to claim 1, characterized in that: The pressure potential energy supply and control module includes: an accumulator, a booster, a pressure regulating valve, a pipeline, a sensor, and an electronic control device.

4. The method and device for outputting kinetic energy based on hydraulic pressure according to claim 1, characterized in that: The difference between the piston area of ​​the two auxiliary cylinders and the cross-sectional area of ​​the piston rod may not be equal, including the difference between the cylinder barrels and the piston rods.

5. The method and device for outputting kinetic energy based on hydraulic pressure according to claim 1, characterized in that: 2 to N groups of equal volume, differential compound cavity hydraulic drives form an equal volume, differential compound cavity collective structure.

6. A method and device for outputting kinetic energy based on hydraulic pressure according to claim 1, characterized in that: The double-acting double-rod hydraulic cylinder (01) can be replaced by a gear and rack type hydraulic cylinder (28), which outputs kinetic energy in the middle of the left and right equal-volume, differential compound chambers; the single-rod hydraulic cylinder (11) can be replaced by a double-rod hydraulic cylinder, and the equal-volume, differential compound chamber hydraulic drive module outputs kinetic energy on both sides; the intermediate gear and rack hydraulic cylinder and the side can also be selected to output kinetic energy in combination; the cross-section of the hydraulic cylinder and the piston rod is not limited to a circle.

7. The method and device for outputting kinetic energy based on hydraulic pressure according to claim 1, characterized in that: The liquid storage device (26) can be replaced by a sealed negative hydraulic pressure container to increase the pressure difference of the left and right equal-volume, differential compound cavities, and increase the driving force through cyclic switching of the two-position four-way reversing valve.

8. The method and device for outputting kinetic energy based on hydraulic pressure according to claim 1, characterized in that: The piston rods output on both sides of the equal volume, differential compound cavity hydraulic drive module are fixed, the cylinder moving rod is kept stationary, and kinetic energy is output on the cylinder barrel.

9. The method and device for outputting kinetic energy based on hydraulic pressure according to claim 1, characterized in that: When the difference between the cross-sectional areas of the two auxiliary cylinder pistons and the piston rod is increased and the increase amplitude multiplied by the working stroke is greater than the total volume of the compound chamber multiplied by the liquid compression rate, a working stroke ends, the total volume of the compound chamber decreases, and the liquid partially flows back to the hydraulic source through the reversing valve.

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