CN102434504B - Hydraulic transformer with axial flow distribution - Google Patents
Hydraulic transformer with axial flow distribution Download PDFInfo
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- CN102434504B CN102434504B CN201110409070.9A CN201110409070A CN102434504B CN 102434504 B CN102434504 B CN 102434504B CN 201110409070 A CN201110409070 A CN 201110409070A CN 102434504 B CN102434504 B CN 102434504B
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Abstract
The invention relates to a hydraulic transformer with axial flow distribution, belonging to the hydraulic technology field and solving the problems that the existing hydraulic transformer has large volume and complex structure. The hydraulic transformer comprises a cylinder body, a flow distribution plate, a pump shell, a flow distribution shell, a main flow distribution shaft, a bearing, a pin, an end cover and a control mechanism, the flow distribution plate and the main flow distribution shaft are connected by a pin, an electric hydraulic servo mechanism is used for controlling the rotation of the main flow distribution shaft, so as to control the rotating angle of the flow distribution plate and realize change of transformer ratio; a fan-shaped notch is arranged on the flow distribution plate, an oil path of the notch is directly communicated inside the pump shell, and a low-pressure return opening of the same pump is realized to be communicated to an oil tank, so as to realize direct connection of the fan-shaped notch and the oil tank; a waist-shaped groove with the same shape as the flow distribution plate and at the same position as the flow distribution plate is designed on the main flow distribution shaft, so as to realize communication of the oil path. The hydraulic transformer with axial flow distribution is used as the hydraulic pressure transformer.
Description
Technical field
The present invention relates to a kind of hydraulic transformer of axial flow distribution, belong to hydraulics field.
Background technique
Development along with hydraulic constant pressure network Secondary Regulation Technology, flexibility and the efficiency of hydraulic system are improved, and Secondary Regulation Technology has many advantages, but when controlling the load of driving straight line by throttling, because the pressure difference that existence is larger is controlled in throttling, therefore have larger energy loss.The gear-shift transmission as power transformer, machinery by the energy of constant pressure network how, with sending out of variable pressure noenergy loss, problem that hydraulic transformer will solve that Here it is.
Traditional hydraulic transformer is by oil hydraulic motor and directly coaxial connection of oil hydraulic pump, by the discharge capacity of regulator solution pressure motor, incoming pressure is become to the pressure that load needs, and realizes pressure change.Because this transformer is by being linked together of oil hydraulic pump and motor machinery, thereby volume and weight is large, and the adjusting power needing is also larger, and cost is high, and efficiency is low, and this has all affected its application.
At Achten P.A.J.hydraulic transformer.WO97/31185,1997(Achten P.A.J. hydraulic transformer, patent No. WO97/31185,1997); Achten P.A.J.Apparatus for executing activities assisted by hydromotorst and a hydraulid transformer for use in such an apparaturs.WO99/40318, the equipment of 12August1999(Achten P.A.J oil hydraulic motor and hydraulic transformer application, patent No. WO99/40318, on August 12nd, 1999); Endsley, John, c.Hydraulic pressure transformer.WO00/28211,18May2000(Endsley, John, c. hydraulic pressure transducer) a kind of new hydraulic transformer structural design has been proposed in patent documentation.It assembles one by the function of oil hydraulic motor and oil hydraulic pump, is called novel hydraulic transformer.Compare with traditional hydraulic transformer, this novel hydraulic transformer gathers the function of oil hydraulic pump and oil hydraulic motor, has formed independently hydraulic element, has simplified its structural type, and its advantage is as follows:
1, can realize the transformation without restriction loss;
2, transformation process is reversible, both can export energy, also can recovered energy;
3, volume is little, and dynamic response is fast, can realize by changing the angle of swing of thrust plate the change of pressure.
But the shortcomings such as it is little that above-mentioned novel hydraulic transformer exists transformation ratio scope simultaneously, and during operation, noise is large, and volume is large, complex structure.
Summary of the invention
The present invention, under the prerequisite realizing without restriction loss, has solved the large and baroque problem of existing hydraulic transformer volume, and a kind of hydraulic transformer of axial flow distribution is provided.
The hydraulic transformer of axial flow distribution of the present invention, it comprises cylinder body, it also comprises thrust plate, pump case, flow shell, flow main shaft, bearing, pin, end cap and control mechanism,
Cylinder body is connected with flow main shaft with thrust plate successively by bearing, one side end face of cylinder body contacts with a side end face of thrust plate, the opposite side end face of thrust plate is fixedly connected with flow main shaft by pin, flow shell is set on the outer round surface of flow main shaft, flow shell and flow main shaft seal are fixed, flow shell is fixedly connected with by socket head screw with the pump case that covers in cylinder body outer round surface outside
Flow main shaft is controlled and driven rotary by control mechanism, control mechanism is socketed in outside the boss of flow main shaft, flow shell and end cap are all socketed in outside flow main shaft, and lay respectively at the both sides of control mechanism, flow shell is fixedly connected with by bolt and nut with end cap, and control mechanism is clamping between end cap and flow shell simultaneously;
Described thrust plate is the disk with sector notch, on thrust plate, be provided with two waist type grooves, two symmetrical line of described two waist type grooves and the symmetrical line of sector notch are all through the center of thrust plate and be along the circumferential direction uniformly distributed, on the end face that flow main shaft is connected with described thrust plate, be provided with two waist type grooves, the shape of described two waist type grooves is identical with waist type groove, and each waist type groove is connected with corresponding waist type groove
The interior ring surface of flow shell arranges the first circular groove and the second circular groove, on the sidewall of flow shell upper end, filler opening is set, this filler opening is corresponding with the first circular groove to be also communicated with, and on the sidewall of flow shell lower end, return opening is set, this return opening is corresponding with the second circular groove to be also communicated with
The first circular groove is communicated with a waist type groove, and the second circular groove is communicated with another waist type groove, the sector notch of thrust plate and the intracavity inter-connection of pump case.
It also comprises that rotation lattice enclose, and flow shell and flow main shaft enclose sealing by rotation lattice.
It is three that described rotation lattice enclose, be separately positioned in the 3rd circular groove, the 4th circular groove and the 5th circular groove on the interior ring surface of flow shell, described the 3rd circular groove is between thrust plate and the first circular groove, the 4th circular groove is between the first circular groove and the second circular groove, and the 5th circular groove is between the boss of the second circular groove flow main shaft.
Advantage of the present invention is: the invention provides a kind of oblique tray type plunger hydraulic transformer of axial flow distribution, it has realized the flow without restriction loss, and the volume of flow-distribution mechanism is little, makes the volume of described hydraulic transformer little, simple in structure.
The present invention be take plate variable plunger pump A10V as body structure, for realizing the control of pressure, on this body structure, its flow-distribution mechanism is designed, and makes transformation scope wider.
The present invention couples together thrust plate and flow main shaft by pin, by the rotation of Control of Electro-hydraulic Servo Actuators flow main shaft, thereby has controlled the corner of thrust plate, has realized the change of transformation ratio.
On thrust plate of the present invention, be provided with sector notch, the oil circuit of this breach has directly been communicated in the housing of pump, and the low pressure return opening of realizing with pump is communicated to fuel tank together, has realized sector notch and has been connected with the direct of fuel tank.Owing to having avoided that a flow mouth is set on flow shell, be connected to fuel tank again, therefore the axial dimension of flow-distribution mechanism reduced.
On flow main shaft, design the waist type groove with thrust plate same position and shape, realized the connection of oil circuit.And two waist type grooves flow main shaft axially on different position flutings, it can be communicated with the circular groove on flow shell respectively, realized the flow without restriction loss, and expanded transformation scope.
The present invention adopts electro-hydraulic servo control mechanism to control the corner of thrust plate, therefore, more accurate than manual control, than actuating motor, controls and is more suitable in engineering machinery.Therefore, hydraulic transformer of the present invention is particularly suitable for as driving the pressure conversion element of straight line load in engineering machinery hydraulic constant pressure network system.
Accompanying drawing explanation
Fig. 1 is the main sectional view of overall structure of the present invention;
Fig. 2 is the plan view of thrust plate;
Fig. 3 is the left view of flow main shaft in Fig. 1;
Fig. 4 is the E-E sectional view of Fig. 3;
Fig. 5 is the E-F sectional view of Fig. 3;
Fig. 6 is the B-B sectional view of Fig. 1;
Fig. 7 is the axial sectional view of flow shell.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 to Fig. 7, the hydraulic transformer of axial flow distribution described in present embodiment, it comprises cylinder body 1, and it also comprises thrust plate 2, pump case 3, flow shell 4, flow main shaft 5, bearing 7, sell 8, end cap 9 and control mechanism 10
Flow main shaft 5 is controlled and driven rotary by control mechanism 10, control mechanism 10 is socketed in outside the boss of flow main shaft 5, flow shell 4 is all socketed in outside flow main shaft 5 with end cap 9, and lay respectively at the both sides of control mechanism 10, flow shell 4 is fixedly connected with by bolt and nut with end cap 9, and control mechanism 10 is clamping between end cap 9 and flow shell 4 simultaneously;
Described thrust plate 2 is the disk with sector notch 2-1, on thrust plate 2, be provided with two waist type groove 2-2, two symmetrical line of described two waist type groove 2-2 and the symmetrical line of sector notch 2-1 are all through the center of thrust plate 2 and be along the circumferential direction uniformly distributed, on the end face that flow main shaft 5 is connected with described thrust plate 2, be provided with two waist type groove 5-1, the shape of described two waist type groove 5-1 is identical with waist type groove 2-2, and each waist type groove 5-1 is connected with corresponding waist type groove 2-2
The interior ring surface of flow shell 4 arranges the first circular groove H1 and the second circular groove H2, on the sidewall of flow shell 4 upper ends, filler opening A1 is set, this filler opening A1 is corresponding with the first circular groove H1 to be also communicated with, on the sidewall of flow shell 4 lower ends, return opening B1 is set, this return opening B1 is corresponding with the second circular groove H2 to be also communicated with
The first circular groove H1 is communicated with a waist type groove 5-1, and the second circular groove H2 is communicated with another waist type groove 5-1, and the sector notch 2-1 of thrust plate 2 is connected with the inner chamber T4 of pump case 3.
In present embodiment, flow main shaft 5 is arranged in flow shell 4, and thrust plate 2 is affixed by pin 8 realizations and flow main shaft 5, and then realizes its common rotation of connected sum of flow oil circuit.Shown in Fig. 2, sector notch 2-1 is labeled as T3 mouth, and one of them waist type groove 2-2 is labeled as A3 mouth, and another waist type groove 2-2 is labeled as B3 mouth.Described T3 mouth is connected with the inner chamber T4 of pump case 3, then is communicated to fuel tank by the low pressure oil return of pump itself.A3 mouth and B3 mouth are connected by the oil duct of flow main shaft 5, by flow shell 4, realize flow, and A3 mouth and external pressure duct and the load respectively of B3 mouth.
Because T3 mouth is directly communicated with the inner chamber T4 of pump case 3, and needn't on pump case 3, reprocess the axial flow distribution mouth of T3 mouth, therefore reduce the volume of hydraulic transformer, realize its integrally-built dwindling.Together with pump case 3 is connected by screw with flow shell 4, realized servo-control mechanism, flow-distribution mechanism is fixedly connected with pump main body.
Described bearing 7 can bear radial and axial power, and flow main shaft 5 is played to supporting effect axially and radially.
Filler opening A1 and return opening B1 can be tapped hole.From Fig. 4 and Fig. 5, the axial shape of two waist type groove 5-1 is all L-type, and the radial section of this L-type is used for respectively realizing and being communicated with of the first circular groove H1 and the second circular groove H2 on flow shell 4, and is used for respectively connecting pressure duct and load pipeline.
Embodiment two: below in conjunction with Fig. 1, present embodiment is described, present embodiment is for to the further illustrating of mode of execution one, and present embodiment also comprises that rotation lattice enclose 6, and flow shell 4 encloses 6 sealings with flow main shaft 5 by rotation lattice.
Embodiment three: present embodiment is described below in conjunction with Fig. 1, present embodiment is further illustrating mode of execution two, it is three that described rotation lattice enclose 6, be separately positioned in the 3rd circular groove h1, the 4th circular groove h2 and the 5th circular groove h3 on the interior ring surface of flow shell 4, described the 3rd circular groove h1 is between thrust plate 2 and the first circular groove H1, the 4th circular groove h2 is between the first circular groove H1 and the second circular groove H2, and the 5th circular groove h3 is between the second circular groove H2 and the boss of flow main shaft 5.
In present embodiment, on flow shell 4 and flow main shaft 5, correspondence has seal groove, then in seal groove, puts into rotation lattice and encloses 6 and realize rotary seal.On the outer ring surface of flow main shaft 5, there is annular groove, be used for expanding area of passage.Shown in Fig. 7, circular groove h1, the h2 forming on the interior ring surface of flow shell 4, h3 are used for respectively laying rotation lattice and enclose 6.
In the present invention, control mechanism 10 is controlled 5 rotations of flow main shaft by electrohydraulic control, and flow main shaft 5 and then drive thrust plate 2 rotate, and thrust plate 2 directly relatively rotates with cylinder body 1, realizes flow.Sector notch 2-1 on thrust plate 2, T3 mouth directly and the inner chamber T4 of pump case 3 be connected, realize together with the internal leakage with the pump housing and be connected to fuel tank, carry out oil return.Two waist type groove 2-2 and two waist type groove 5-1 are communicated with respectively, and the flow oil duct by flow main shaft 5 is communicated in the annular oil groove of flow shell 4.
In conjunction with shown in Fig. 1 to Fig. 7, the A3 mouth of thrust plate 2 and the A2 mouth of flow main shaft 5 are connected; The B3 mouth of thrust plate 2 and the B2 mouth of flow main shaft 5 are connected.
Working principle of the present invention: when described hydraulic transformer access constant pressure network, the filler opening A1 that the pressure oil of constant pressure network is received to flow shell 4 is upper, the pipeline of load is received on the return opening B1 of flow shell 4; The inner chamber T4 that the pipeline of oil sump tank is received to pump case 3 is upper, has completed like this connection of hydraulic transformer in constant pressure network system.Described hydraulic transformer is connected with fuel tank by its inner oil circuit forming.Between thrust plate 2 and cylinder body 1, relatively rotate, make the relative movement of cylinder block of plunger produce oil suction and oil extraction.Transformer has three oil circuits to be connected with constant pressure network system, and one in order to enter the flow of the filler opening A1 of flow shell 4, another is a part of hydraulic oil that flows to load, and third part is the hydraulic oil that flows back to fuel tank.By the equation of continuity of fluid, the flow algebraic sum of three passages and three oil circuits is zero.According to law of conservation of energy, high pressure oilhole A1, A2, A3, the pressure of load oilhole B1, B2, B3 and oil sump tank oilhole T3, T4 is zero with the product algebraic sum of flow separately respectively.Control the corner of thrust plate 2; it is the flow of controllable load oil circuit B1, B2, B3; conventionally two passages of pressure and all the other of oil sump tank passage T3 and T4 are compared very low; therefore the product of the pressure of oil sump tank passage and flow is ignored; the pressure of high-pressure channel A3 and the product of flow add that the pressure of load channel B3 and the product of flow are zero; hence one can see that, and the pressure ratio of the pressure of load channel B3 and high-pressure channel A3 equals the flow of high-pressure channel A3 and the flow ratio of load channel B3.Hydraulic Transformer is than being size according to load, by controlling the controlled angle of hydraulic transformer, changes that the change of three channel capacities of thrust plate 2 realizes.
Claims (3)
1. the hydraulic transformer of an axial flow distribution, it comprises cylinder body (1), it is characterized in that: it also comprises thrust plate (2), pump case (3), flow shell (4), flow main shaft (5), bearing (7), pin (8), end cap (9) and control mechanism (10)
Cylinder body (1) is connected with flow main shaft (5) with thrust plate (2) successively by bearing (7), one side end face of cylinder body (1) contacts with a side end face of thrust plate (2), the opposite side end face of thrust plate (2) is fixedly connected with flow main shaft (5) by pin (8), flow shell (4) is set on the outer round surface of flow main shaft (5), flow shell (4) is fixing with flow main shaft (5) sealing, flow shell (4) is fixedly connected with by socket head screw with the pump case (3) that covers in cylinder body (1) outer round surface outside
Flow main shaft (5) is controlled and driven rotary by control mechanism (10), control mechanism (10) is socketed in outside the boss of flow main shaft (5), flow shell (4) is all socketed in outside flow main shaft (5) with end cap (9), and lay respectively at the both sides of control mechanism (10), flow shell (4) is fixedly connected with by bolt and nut with end cap (9), and control mechanism (10) is clamping between end cap (9) and flow shell (4) simultaneously;
Described thrust plate (2) is the disk with sector notch (2-1), on thrust plate (2), be provided with two waist type grooves (2-2), two symmetrical line of described two waist type grooves (2-2) and the symmetrical line of sector notch (2-1) are all through the center of thrust plate (2), and be along the circumferential direction uniformly distributed, on the end face that flow main shaft (5) is connected with described thrust plate (2), be provided with two waist type grooves (5-1), the shape of described two waist type grooves (5-1) is identical with waist type groove (2-2), and each waist type groove (5-1) is connected with corresponding waist type groove (2-2),
The interior ring surface of flow shell (4) arranges the first circular groove (H1) and the second circular groove (H2), on the sidewall of flow shell (4) upper end, filler opening (A1) is set, this filler opening (A1) is corresponding with the first circular groove (H1) to be also communicated with, on the sidewall of flow shell (4) lower end, return opening (B1) is set, this return opening (B1) is corresponding with the second circular groove (H2) to be also communicated with
The first circular groove (H1) is communicated with a waist type groove (5-1), and the second circular groove (H2) is communicated with another waist type groove (5-1), and the sector notch (2-1) of thrust plate (2) is connected with the inner chamber (T4) of pump case (3).
2. the hydraulic transformer of axial flow distribution according to claim 1, is characterized in that: it also comprises that rotation lattice enclose (6), and flow shell (4) encloses (6) sealing with flow main shaft (5) by rotation lattice.
3. the hydraulic transformer of axial flow distribution according to claim 2, it is characterized in that: it is three that described rotation lattice enclose (6), be separately positioned on the 3rd circular groove (h1) on the interior ring surface of flow shell (4), in the 4th circular groove (h2) and the 5th circular groove (h3), described the 3rd circular groove (h1) is positioned between thrust plate (2) and the first circular groove (H1), the 4th circular groove (h2) is positioned between the first circular groove (H1) and the second circular groove (H2), the 5th circular groove (h3) is positioned between the second circular groove (H2) and the boss of flow main shaft (5).
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| CN201110409070.9A CN102434504B (en) | 2011-12-09 | 2011-12-09 | Hydraulic transformer with axial flow distribution |
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| CN201110409070.9A CN102434504B (en) | 2011-12-09 | 2011-12-09 | Hydraulic transformer with axial flow distribution |
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| CN102434504B true CN102434504B (en) | 2014-02-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174689B (en) * | 2013-03-29 | 2015-06-24 | 哈尔滨工业大学 | Variable electro-hydraulic servo hydraulic transformer |
| CN107461370A (en) * | 2017-07-24 | 2017-12-12 | 徐州工程学院 | A kind of electro-hydraulic integrated swash plate plunger type hydraulic transformer |
| CN112855647B (en) * | 2021-03-23 | 2021-12-31 | 同济大学 | Large-flow shaft flow distribution servo valve |
| CN112855648B (en) * | 2021-03-23 | 2021-12-31 | 同济大学 | Multi-redundancy shaft flow distribution servo valve |
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| NL1016046C2 (en) * | 2000-08-29 | 2002-03-01 | Innas Free Piston Bv | Hydraulic pressure transformer converts first oil flow with first pressure into second oil flow with second pressure by feeding or withdrawing oil with low pressure |
| CN1621699A (en) * | 2004-09-30 | 2005-06-01 | 宁波华液机器制造有限公司 | Hydraulic cylinder controlled hydraulic transformer |
| CN101354051A (en) * | 2008-09-08 | 2009-01-28 | 哈尔滨工业大学 | Electric control inclined shaft plunger type hydraulic transformer |
| CN101408154A (en) * | 2008-11-13 | 2009-04-15 | 哈尔滨工业大学 | Hydraulic cylinder-controlled oblique tray type plunger hydraulic transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NL1002430C2 (en) * | 1996-02-23 | 1997-08-26 | Innas Free Piston Ifp Bv | Device for generating, using or transforming hydraulic energy. |
| WO1999040318A1 (en) * | 1998-02-10 | 1999-08-12 | Innas Free Piston B.V. | Apparatus for executing activities assisted by hydromotors and a hydraulic transformer for use in such an apparatus |
| US6092455A (en) * | 1998-11-06 | 2000-07-25 | Caterpillar Inc. | Hydraulic pressure transformer |
| DE10241979A1 (en) * | 2002-09-11 | 2004-03-18 | Bosch Rexroth Ag | Hydrotransformer has dead space which enlarges displacement chamber during reversing phase, and switching unit has three control slots distributed around circumference, with dead spaces opening into region between control slots |
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2011
- 2011-12-09 CN CN201110409070.9A patent/CN102434504B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1016046C2 (en) * | 2000-08-29 | 2002-03-01 | Innas Free Piston Bv | Hydraulic pressure transformer converts first oil flow with first pressure into second oil flow with second pressure by feeding or withdrawing oil with low pressure |
| CN1621699A (en) * | 2004-09-30 | 2005-06-01 | 宁波华液机器制造有限公司 | Hydraulic cylinder controlled hydraulic transformer |
| CN101354051A (en) * | 2008-09-08 | 2009-01-28 | 哈尔滨工业大学 | Electric control inclined shaft plunger type hydraulic transformer |
| CN101408154A (en) * | 2008-11-13 | 2009-04-15 | 哈尔滨工业大学 | Hydraulic cylinder-controlled oblique tray type plunger hydraulic transformer |
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