CN109779869B - High-power axial plunger type hydraulic pump similar to planetary gear train structure - Google Patents
High-power axial plunger type hydraulic pump similar to planetary gear train structure Download PDFInfo
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- CN109779869B CN109779869B CN201910120734.6A CN201910120734A CN109779869B CN 109779869 B CN109779869 B CN 109779869B CN 201910120734 A CN201910120734 A CN 201910120734A CN 109779869 B CN109779869 B CN 109779869B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 29
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Abstract
The invention belongs to the field of axial plunger hydraulic pumps, and particularly discloses a high-power axial plunger hydraulic pump similar to a planetary gear train structure, which comprises a left end cover, a transmission piece, a bracket, N unit pumps, a unit pump right end cover and a pipeline, wherein the left end cover and the unit pump right end cover are respectively arranged at two ends of the bracket; the N unit pumps are uniformly arranged along the circumferential direction of the transmission shaft and are arranged between the support and the right end cover of the unit pump, and the N unit pumps are connected with the pipeline and meshed with the large gear ring, so that the power of an external power source is transmitted to the unit pump through the large gear ring. The invention has the advantages of large flow, simple structure, high power generation quality by being matched with the hydraulic motor to drive the synchronous motor at a constant speed, and the like.
Description
Technical Field
The invention belongs to the field of axial plunger hydraulic pumps, and particularly relates to a high-power axial plunger hydraulic pump with a similar planetary gear train structure.
Background
With the development of wind power generation technology, a plurality of wind power generation equipment is developed, but the conventional wind power generation equipment has the following problems: the wind speed is low, the economic benefit is low, the power demand is low when the wind power is large in some areas, the economical efficiency is low, the one-time input cost is low, the high-yield energy is low, the maintenance and repair cost is high, the power generation is unstable, and the harmonic pollution can be caused when the wind power is integrated into a power grid. To solve the above problems, those skilled in the art have studied to convert wind energy into hydraulic energy by using a hydraulic pump in combination with a hydraulic motor, so as to output stable mechanical energy.
However, the current hydraulic pump is difficult to realize high-power transmission and cannot meet the working condition of low speed and high power. Accordingly, further research is still needed to obtain hydraulic pumps that can meet extremely low speed, high power conditions.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a high-power axial plunger type hydraulic pump similar to a planetary gear train structure, which is characterized in that a plurality of unit hydraulic plunger pumps are arranged on a planetary gear train, each unit pump is driven to work in a gear meshing mode through the planetary gear train, and the high-power axial plunger type hydraulic pump has the advantages of high total efficiency, small flow distribution leakage through a valve, high pump power, small flow stability pulsation and the like when low speed is input.
In order to achieve the above-mentioned purpose, the present invention provides a high-power axial plunger hydraulic pump with a planetary gear train structure, which comprises a left end cover, a transmission member, a bracket, N unit pumps, a right end cover of the unit pumps and a pipeline, wherein:
the left end cover and the unit pump right end cover are respectively arranged at two ends of the bracket, the transmission piece and the left end cover are coaxially arranged and arranged between the left end cover and the bracket, the transmission piece comprises a transmission shaft and a large gear ring which is integrally processed with the transmission shaft, and one end of the transmission shaft, which is close to the left end cover, penetrates through the left end cover and is connected with an external power source;
the N unit pumps are uniformly arranged along the circumferential direction of the transmission shaft and are arranged between the bracket and the right end cover of the unit pump, and the N unit pumps are connected with the pipeline and meshed with the large gear ring, so that the power of an external power source is transmitted to each unit pump through the large gear ring.
As a further preference, the unit pump is preferably a dosing unit pump and/or a variable unit pump.
As a further preferred feature, the dosing unit pump comprises a cylinder, a left swash plate, a left return disc, a left plunger shoe set, a left return ball joint, a return spring, a suction extrusion valve set, a right plunger shoe set, a right swash plate, a right return disc and a right return ball joint, wherein gears meshed with the large gear ring are arranged outside the cylinder, and the left and right plunger shoe sets are symmetrically arranged in the cylinder to form plunger pairs, and each pair of plunger pairs shares one suction extrusion valve set; the left and right sloping plates are respectively arranged at the left and right ends of the cylinder body and are respectively connected with the left and right return plates, and the left and right return plates are hinged with the corresponding left and right plunger piston shoe groups; the left return spherical hinge and the right return spherical hinge are respectively arranged in cavities at the left end and the right end of the cylinder body, one ends of the left return spherical hinge and the right return spherical hinge are propped against by return springs, and the other ends of the left return spherical hinge and the right return spherical hinge are contacted with the center spherical surfaces of the corresponding left return disc and the right return disc through spherical surfaces, so that the left plunger piston shoe group and the right plunger piston shoe group are always pressed to the left swash plate and the right swash plate.
As a further preferred aspect, the variable displacement unit pump comprises a cylinder body, a left swash plate, a left return disc, a left plunger shoe set, a left return spherical hinge, a return spring, a suction extrusion valve group, a right plunger shoe set, a right swash plate, a right return disc, a right return spherical hinge and a variable displacement adjusting component, wherein a gear meshed with the large gear ring is arranged outside the cylinder body, and the left plunger shoe set and the right plunger shoe set are symmetrically arranged in the cylinder body to form plunger pairs, and each pair of plunger pairs shares one suction extrusion valve group; the left and right sloping plates are respectively arranged at the left and right ends of the cylinder body and are respectively connected with the left and right return plates, and the left and right return plates are hinged with the corresponding left and right plunger piston shoe groups; the left return spherical hinge and the right return spherical hinge are respectively arranged in cavities at the left end and the right end of the cylinder body, one end of the left return spherical hinge and the right return spherical hinge are propped by a return spring, and the other end of the left return spherical hinge and the right return spherical hinge are contacted with the center spherical surfaces of the left return disc and the right return disc through spherical surfaces; the variable adjusting component is arranged at the right end of the cylinder body and used for adjusting flow variables.
As a further preferred feature, the variable adjustment assembly comprises an oil outlet connector body and a variable handle, which are sequentially mounted at the right end of the right swash plate by means of keys.
As a further preferred aspect, the variable adjustment assembly includes a swash plate support spring seat and a variable slider, both of which are installed in the unit pump right end cover, the swash plate support spring seat is connected to the right swash plate through a spring, and the variable slider is slidable in the unit pump right end cover and is connected to the right swash plate through a link.
As a further preferred option, each unit pump, when installed in a circumferential distribution, has an initial phase angle differing by 1/N flow pulsation period, respectively.
In general, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the planetary gear train structure is adopted to radially provide power for the unit hydraulic plunger pump, and the planetary gear train structure is different from the structure of the traditional hydraulic plunger pump for directly providing power from the axial direction, and has the advantages of high total efficiency, small flow distribution leakage through a valve, high pump power (reaching more than 1000 KW), stable flow pulsation, high power density, high space utilization rate and the like when low speed is input.
2. The high-power axial plunger hydraulic pump adopts the gear meshing structure to provide power for the unit hydraulic plunger pump, the large gear ring of the high-power axial plunger hydraulic pump directly provides power for the cylinder body, a certain speed increasing ratio can be formed between the rotating speed on the cylinder body and the rotating speed of the large gear ring, the rotating speed is increased to a certain extent, the rotating speed of the hydraulic pump is improved through the design of the high-power axial plunger hydraulic pump, and the high-efficiency operation of the high-power axial plunger hydraulic pump can be realized under the condition of lower input rotating speed.
3. The high-power axial plunger hydraulic pump adopts a structure of circumferentially distributing N unit hydraulic pumps, improves the total displacement of the pump, and reasonably utilizes space, so that the pump can achieve ultra-large wind energy absorption power.
4. The unit hydraulic plunger pump in the high-power axial plunger type hydraulic pump has three structures, one is a constant displacement pump, the other is a variable displacement unit pump, and the structure is various, so that the displacement of the hydraulic pump can be manually adjusted according to different wind speeds, and the hydraulic motor can always obtain stable hydraulic energy.
5. The N double-swash-plate hydraulic plunger pumps are arranged on the support, the displacement of the N double-swash-plate hydraulic plunger pumps is 2N times of that of a common pump, the flow pulsation can be effectively reduced, the phase angles of the unit pumps are staggered by 1/N of the flow pulsation period of the unit pumps when the unit pumps are circumferentially distributed and arranged, and the pulsation is reduced, the power is increased and the ultra-large level is achieved due to the fact that the flow is finally summarized together and the pulsation is known by a superposition principle.
6. The high-power axial plunger type hydraulic pump has the advantages of large flow, simple structure, high power generation quality by being matched with the hydraulic motor to drive the synchronous motor at a constant speed, saving of a gearbox and frequency conversion equipment, cost saving, weight reduction and flexible energy storage.
Drawings
FIG. 1 is a front view of a high power axial plunger hydraulic pump of the planetary gear train-like construction of the present invention;
FIG. 2 is a view in the direction A of FIG. 1;
FIG. 3 is a front view of a first metering unit pump of the present invention;
FIG. 4 is a front view of a second metering unit pump of the present invention;
FIG. 5 is a front view of a first variable displacement pump of the present invention;
FIG. 6 is a front view of a second variable displacement pump of the present invention;
FIG. 7a is a force analysis schematic diagram of the flow channel at the right end of the dosing unit pump block of FIG. 3;
FIG. 7b is a force analysis schematic diagram of the flow channel at the right end of the dosing unit pump block of FIG. 4;
fig. 8 is a front view of a high-power axial plunger hydraulic pump with a large gear as a center wheel of the present invention.
In the figure: the hydraulic pump comprises a left end cover, a large gear ring, a 3-support, a 4-unit pump, a 5-right swash plate, a 6-pipeline, a 7-left swash plate, an 8-left return disc, a 9-pressing plate, a 10-left plunger piston shoe set, an 11-left spherical hinge, a 12-return spring, a 13-suction extrusion valve set, a 14-cylinder body, a 15-right plunger piston shoe set, a 16-right swash plate, a 17-right return disc, an 18-right spherical hinge, a 19-sealing piece, a 20-oil outlet connector body, a 21-variable handle, a 23-key, a 24-swash plate support spring seat, a 25-variable sliding block and a 26-radial flow channel.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention provides a novel parallel structure form of an axial plunger pump, which adopts a planetary gear train to supply power to a cylinder body of the hydraulic plunger pump from the radial direction, and is different from the structure form that the traditional hydraulic plunger pump directly supplies power from the axial direction, the rotating speed of a gear on the cylinder body and the rotating speed of a large gear ring have a certain speed increasing ratio, the rotating speed is increased to a certain extent, and the planetary gear train plays a role in increasing the speed in the invention.
As shown in fig. 1-3, the high-power axial plunger hydraulic pump with a planetary gear train-like structure provided by the embodiment of the invention comprises a left end cover 1, a transmission part 2, a bracket 3, N unit pumps 4, a unit pump right end cover 5 and a pipeline 6, wherein the left end cover 1 and the unit pump right end cover 5 are respectively arranged at two ends of the bracket 3, the transmission part 2 is coaxially arranged with the left end cover 1 and is arranged between the left end cover 1 and the bracket 3, the transmission part 2 comprises a transmission shaft and a large gear ring integrally processed with the transmission shaft, and one end of the transmission shaft, which is close to the left end cover 1, passes through the left end cover 1 and is connected with an external power source; n (e.g., 8) unit pumps 4 are uniformly arranged along the circumferential direction of the transmission shaft and are disposed between the bracket 3 and the unit pump right end cover 5, and the N unit pumps 4 are each connected with the pipeline 6 and are each meshed with the large ring gear, so that the power of the external power source is transmitted from the radial direction to each unit pump 4 through the large ring gear.
Specifically, the bracket 3 is a combination of a shell and an internal support, the left end cover 1 is fixedly arranged at the left end of the bracket 3 through an inner hexagon screw, the bracket 3 is fixed, and the right end cover 5 of the unit pump is arranged at a position corresponding to the right end of the bracket through a screw; the large gear ring and the transmission shaft are machined into a whole, the transmission shaft is supported between the left end cover 1 and the bracket 3 through two bearings, the left shaft end of the transmission shaft is provided with a spline which is connected with an external power source such as a motor or a wind power generation impeller and provides power, the number of the unit pump right end covers 5 is consistent with that of the unit pumps 4, the unit pumps 4 are fixedly arranged at positions corresponding to the right ends of the bracket 3 through screws, the unit pumps 4 are supported between the bracket 3 and the unit pump right end covers 5 through bearings and meshed with the large gear ring, and the large gear ring transmits power to the cylinder bodies 14 of the unit pumps. Fig. 1 is a scheme in which the ring gear is of an external gear structure, and fig. 8 is a scheme in which the ring gear is of a central gear, both schemes have the same effect, and the functions and advantages described below are equally applicable to both schemes.
The large gear ring and the transmission shaft of the hydraulic pump are arranged into a whole, an external power source such as a motor or a wind power generation impeller provides power, the large gear ring transmits the power to each cylinder body on the planetary gear system through a gear mechanism, when the cylinder body rotates, the plunger piston makes periodic reciprocating motion under the action of the two swash plates and the return mechanism, so that the volume of a plunger piston cavity is periodically changed, the suction and extrusion processes are completed under the periodic work of the suction valve and the extrusion valve, and the cylinder body only makes self rotary motion around the axis of the cylinder body and does not revolve along with the large gear ring. The hydraulic pump designed by the invention has a speed increasing ratio because the number of teeth on the large gear ring gear is more than that on the cylinder body, and has a transmission ratio between two gears, so that the rotation speed of the unit pump is increased (for example, the speed is increased by 5 times) to a certain extent, the problems of low mechanical efficiency, low volumetric efficiency and low total efficiency of the pump when the pump inputs low speed are solved, and the pump can work at a high efficiency under a lower input speed.
As shown in fig. 1, the joint of the pipeline and the unit pump is provided with a one-way valve, so that liquid can only flow from suction to extrusion, and high-pressure liquid is prevented from communicating with low pressure through the damaged unit hydraulic pump after one of the unit pumps is damaged.
In the present invention, the unit pump 4 rotates on a support like planetary gears of a planetary gear train, which is preferably a dosing unit pump and/or a variable unit pump, as shown in fig. 3 and 4, the dosing unit pump comprises a cylinder 14, a left swash plate 7, a left return disc 8, a left plunger shoe set 10, a left return ball joint 11, a return spring 12, a suction extrusion valve set 13, a right plunger shoe set 15, a right swash plate 16, a right return disc 17 and a right return ball joint 18, wherein a gear meshed with a large gear ring is arranged outside the cylinder 14, and the left and right plunger shoe sets 10 and 15 are symmetrically arranged in the cylinder 14 to form plunger pairs, and each plunger pair shares one suction extrusion valve set 13; the left and right swash plates 7, 16 are respectively arranged at the left and right ends of the cylinder body 14, the left and right swash plates 7, 16 are respectively connected with the left and right return plates 8, 17, and the left and right return plates 8, 17 are hinged with the corresponding left and right plunger slipper sets 10, 15; the left and right return spherical hinges 11, 18 are respectively arranged in the cavities at the left and right ends of the cylinder 14, one ends of the left and right return spherical hinges 11, 18 are supported by the return springs 12, and the other ends are in spherical contact with the center spherical surfaces of the left and right return discs 8, 17 through the spherical surfaces, so that the left and right return discs 8, 17 always obtain a force for pressing the left and right plunger slipper sets 10, 15 to the left and right swash plates 7, 16.
Specifically, the left and right swash plates 7, 16 are respectively fixed on the corresponding position of the left end of the bracket 3 and the right end cover 5 of the unit pump, the included angles between the left and right swash plates 7, 16 and the end covers are 16 degrees, plunger cavities for installing plunger slipper sets are formed in the two ends of the cylinder 14, an open cavity is formed in the middle of the cylinder, liquid in the cavity can enter the plunger cavities through a suction valve, the liquid can be extruded from the cavity through an extrusion valve, the suction extrusion valve group 1 is sleeved in the middle of the cylinder, and the suction and extrusion are completed separately. The left end of the cylinder block 14 is also provided with a pressing plate 9 for fixing the plunger sleeve into a whole with the cylinder block, and the right end of the right swash plate 16 is provided with a sealing element 19 for sealing.
As shown in fig. 3 and 4, the quantitative unit pump has two structural forms, the quantitative double-sloping cam plate hydraulic plunger pump shown in fig. 3 adopts mechanical seal, and the right end of the cylinder body is communicated with the pipeline 6; the quantitative double-swash-plate hydraulic plunger pump shown in fig. 4 adopts a rotary gray ring seal, and a radial flow channel 26 is formed at the right end of the cylinder body, and the radial flow channel 26 is communicated with the pipeline 6. As can be seen from the two cylinder force analysis diagrams of fig. 7a and 7b, the left side of the right end flow passage of the cylinder in fig. 4 receives hydraulic force of f1=pxa to the left (P is working pressure, a is the flow passage cross-sectional area inside the cylinder), the right side receives hydraulic force of f2=pxa to the right, the hydraulic force received in the axial direction of the cylinder by the force balancing principle is a pair of balancing forces, and the right end flow passage of the cylinder in fig. 3 receives hydraulic force of f3=pxa to the left, so the structure of fig. 4 has the advantage of balancing hydraulic force.
Specifically, the variable displacement unit pump 4 has two structures, the first is a swash plate angle variable double swash plate hydraulic plunger pump as shown in fig. 5, which achieves a variable effect by swaying the swash plate by the swash plate in a circumferential angle, and the second is a variable displacement double swash plate hydraulic plunger pump as shown in fig. 6, which achieves a variable effect by changing the swash plate meridian in-plane inclination angle. The plunger pump in fig. 5 comprises a cylinder 14, a left swash plate 7, a left return disc 8, a left plunger slipper set 10, a left return spherical hinge 11, a return spring 12, a suction extrusion valve group 13, a right plunger slipper set 15, a right swash plate 16, a right return disc 17, a right return spherical hinge 18 and a variable adjustment assembly, wherein a gear meshed with a large gear ring is arranged outside the cylinder 14, the left plunger slipper set 10 and the right plunger slipper set 15 are symmetrically arranged in the cylinder 14 to form plunger pairs, and each pair of plunger pairs shares one suction extrusion valve group 13; the left and right swash plates 7, 16 are respectively arranged at the left and right ends of the cylinder 14 and are respectively connected with the left and right return plates 8, 17, and the left and right return plates 8, 17 are hinged with the corresponding left and right plunger slipper sets 10, 15; the left and right return spherical hinges 11, 18 are respectively arranged in the cavities at the left and right ends of the cylinder 14, one end of the left and right return spherical hinges 11, 18 is supported by the return spring 12, and the other end is contacted with the center spherical surfaces of the left and right return discs 8, 17 through the spherical surfaces; the variable adjusting component is arranged at the right end of the cylinder body 14 and used for adjusting flow variables, the variable adjusting component comprises an oil outlet connector body 20 and a variable handle 21, the oil outlet connector body 20 and the variable handle 21 are sequentially arranged at the right end of the right swash plate 16 through a key 23, and the oil outlet connector body 20 is communicated with the pipeline 6. The plunger pump can change the relative angles of the two swash plates of the unit pump by rotating the variable handle by one angle and then rotating the right swash plate connected by the key by one angle, so that the effective acting stroke of the two plungers is changed, and the variable is realized.
The plunger pump in fig. 6 comprises a cylinder 14, a left swash plate 7, a left return disc 8, a left plunger shoe set 10, a left return spherical hinge 11, a return spring 12, a suction extrusion valve group 13, a right plunger shoe set 15, a right swash plate 16, a right return disc 17, a right return spherical hinge 18 and a variable adjustment assembly, wherein a gear meshed with a large gear ring is arranged outside the cylinder 14, the left and right plunger shoe sets 10 and 15 are symmetrically arranged in the cylinder 14 to form plunger pairs, and each pair of plunger pairs shares one suction extrusion valve group 13; the left and right swash plates 7, 16 are respectively arranged at the left and right ends of the cylinder 14 and are respectively connected with the left and right return plates 8, 17, and the left and right return plates 8, 17 are hinged with the corresponding left and right plunger slipper sets 10, 15; the left and right return spherical hinges 11, 18 are respectively arranged in the cavities at the left and right ends of the cylinder 14, one end of the left and right return spherical hinges 11, 18 is supported by the return spring 12, and the other end is contacted with the center spherical surfaces of the left and right return discs 8, 17 through the spherical surfaces; the variable adjusting assembly is arranged at the right end of the cylinder body 14, the variable adjusting assembly comprises a swash plate supporting spring seat 24 and a variable sliding block 25, the swash plate supporting spring seat 24 and the variable sliding block 25 are both arranged in the right end cover 5 of the unit pump, the swash plate supporting spring seat 24 is connected with the right swash plate 16 through a spring, the variable sliding block 25 can slide in the right end cover 5 of the unit pump and is connected with the right swash plate 16 through a connecting rod, the variable sliding block 25 is also connected with a handle, the variable sliding block is controlled to slide in a hole of the right end cover of the unit pump through the handle, and the variable sliding block drives the right swash plate to move through the connecting rod, so that the inclination angle of the right swash plate is controlled to achieve the purpose of variable; an oil outlet connector body is arranged at the right end of the cylinder body 14 and is communicated with the pipeline 6 through the oil outlet connector body.
In the invention, when each unit pump is installed in a circumferential distribution manner, the initial phase angles are respectively different by 1/N flow pulsation periods (the flow pulsation periods are known parameters after the structure of the unit pump is determined), namely, when the next unit pump is installed, the first unit pump is taken as an installation reference, the unit pump is installed after rotating around the axis of the unit pump for 1/N flow pulsation periods on the reference of the previous unit pump, and the like, so that the initial phase angles of the adjacent unit pumps are different by 1/N flow pulsation periods, and each cylinder body is synchronously rotated because the radial power is provided by a large gear ring, the flow pulsation diagrams are different by 1/N periods due to the phase angle difference by 1/N period, the flow pulsation peak value and the trough value are complementary after superposition, so that the flow pulsation is reduced, the power is increased after superposition, and the super-large level is achieved.
The working process and principle of the high-power axial plunger hydraulic pump are as follows:
as shown in fig. 1-3, the external power source drives the transmission shaft and the large gear ring to rotate clockwise through spline connection, the large gear ring drives the cylinder body of each unit pump to rotate through gear engagement, and under the combined action of the left swash plate 6, the right swash plate 15 and the spherical hinge return mechanism, each plunger pair completes periodic reciprocating motion in the plunger cavity, so that each plunger hole forms a pressure field with alternating height; when the volume of the plunger cavity is continuously enlarged and is in a low-pressure field along with the rotation of the cylinder body, the valve core of the suction valve is opened upwards, and liquid is sucked, so that the suction process of the plunger pump is completed; with the continued rotation of the cylinder body, when the volume of the plunger cavity which completes the suction action is continuously reduced and is in a high-pressure field, the valve core of the suction valve is closed downwards and pressed tightly, the valve core of the extrusion valve is opened downwards, the extrusion action of the unit plunger pump is realized, and the liquid is discharged from the cavity of the cylinder body through a pipeline and finally does work to the outside.
As shown in fig. 5, after the swash plates are rotated by one angle, the relative position between the two swash plates is changed, the volume of liquid sucked by a pair of plungers from the minimum-volume state to the maximum-volume state is changed in one cycle, and the discharged volume is also changed so that the displacement is changed. As shown in FIG. 6, the variable slider is controlled to slide in the hole of the right end cover of the unit pump, and the variable slider is controlled to move by the swash plate through the connecting rod, so that the inclination angle of the swash plate is controlled to achieve the purpose of variable.
The high-power axial plunger hydraulic pump adopts a scheme that a plurality of plunger pumps are connected in parallel for wind power generation, and has the following components: the hydraulic motor can meet the extreme low-speed high-power working condition, is matched with the hydraulic motor to drive the synchronous motor to generate electricity at a constant speed, saves the speed increasing equipment and the frequency conversion equipment of the existing wind power device, saves the cost, reduces the weight, and has the advantages of flexible energy storage and the like. Because the plunger type hydraulic pump has low running efficiency at low rotating speed, the high-power axial plunger type hydraulic pump similar to the planetary gear train structure designed by the invention can meet the working condition of low rotating speed and high power, has the advantage of high pressure and easy variable of the axial plunger pump, and is suitable for wind power generation and ocean energy power generation.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (1)
1. The utility model provides a high-power axial plunger type hydraulic pump of similar planetary gear train structure which characterized in that includes left end cover (1), driving medium (2), support (3), N unit pump (4), unit pump right-hand member lid (5) and pipeline (6), wherein:
the left end cover (1) and the unit pump right end cover (5) are respectively arranged at two ends of the bracket (3), the transmission piece (2) and the left end cover (1) are coaxially arranged and arranged between the left end cover (1) and the bracket (3), the transmission piece (2) comprises a transmission shaft and a large gear ring which is integrally processed with the transmission shaft, and one end of the transmission shaft, which is close to the left end cover (1), penetrates through the left end cover (1) and is connected with an external power source;
the N unit pumps (4) are uniformly arranged along the circumferential direction of the transmission shaft and are arranged between the bracket (3) and the right end cover (5) of the unit pump, and the N unit pumps (4) are connected with the pipeline (6) and meshed with the large gear ring, so that the power of an external power source is transmitted to the unit pump (4) through the large gear ring;
the unit pump (4) is a variable unit pump; the variable unit pump comprises a cylinder body (14), a left swash plate (7), a left return disc (8), a left plunger piston shoe set (10), a left return spherical hinge (11), a return spring (12), a suction extrusion valve set (13), a right plunger piston shoe set (15), a right swash plate (16), a right return disc (17), a right return spherical hinge (18) and a variable adjusting component, wherein a gear meshed with the large gear ring is arranged outside the cylinder body (14), and the left plunger piston shoe set and the right plunger piston shoe set (10, 15) are symmetrically arranged in the cylinder body (14) to form plunger pairs, and each plunger pair shares one suction extrusion valve set (13); the left and right swash plates (7, 16) are respectively arranged at the left and right ends of the cylinder body (14) and are respectively connected with the left and right return plates (8, 17), and the left and right return plates (8, 17) are hinged with the corresponding left and right plunger piston shoe groups (10, 15); the left and right return spherical hinges (11, 18) are respectively arranged in cavities at the left and right ends of the cylinder body (14), one ends of the left and right return spherical hinges (11, 18) are supported by the return springs (12), and the other ends of the left and right return spherical hinges are contacted with the central spherical surfaces of the corresponding left and right return discs (8, 17) through spherical surfaces; the variable adjusting component is arranged at the right end of the cylinder body (14) and is used for adjusting flow variables;
the variable adjusting assembly comprises a swash plate supporting spring seat (24) and a variable sliding block (25), wherein the swash plate supporting spring seat (24) and the variable sliding block (25) are both arranged in the right end cover (5) of the unit pump, the swash plate supporting spring seat (24) is connected with the right swash plate (16) through a spring, and the variable sliding block (25) can slide on the right end cover (5) of the unit pump and is connected with the right swash plate (16) through a connecting rod;
when each unit pump is installed in a circumferential distribution, the initial phase angles are respectively different by 1/N flow pulsation periods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120734.6A CN109779869B (en) | 2019-02-19 | 2019-02-19 | High-power axial plunger type hydraulic pump similar to planetary gear train structure |
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| JP2018193981A (en) * | 2017-05-15 | 2018-12-06 | 渡部 富治 | Extremely-low speed/high-torque type piston pump/motor suppressed in friction loss and leakage of working fluid |
| CN209671150U (en) * | 2019-02-19 | 2019-11-22 | 华中科技大学 | A kind of large power shaft of similar planetary gear train structure is to pluger type hydraulic pump |
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2019
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| WO2004033906A1 (en) * | 2002-10-10 | 2004-04-22 | Permo-Drive Research And Development Pty Ltd | Hydraulic pump/motor with epicyclic gear control |
| CN102619720A (en) * | 2012-03-30 | 2012-08-01 | 华中科技大学 | Plunger type motor pump |
| JP2016037956A (en) * | 2014-08-11 | 2016-03-22 | 渡部 富治 | Low cost pendulum type wave power generation device |
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| JP2017015068A (en) * | 2015-07-06 | 2017-01-19 | 渡部 富治 | Wind power/wave power generation machine/hydraulic complex transmission |
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| CN108757373A (en) * | 2018-05-31 | 2018-11-06 | 华中科技大学 | A kind of two inclined plate plunger type motor pump |
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| CN209671150U (en) * | 2019-02-19 | 2019-11-22 | 华中科技大学 | A kind of large power shaft of similar planetary gear train structure is to pluger type hydraulic pump |
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| CN109779869A (en) | 2019-05-21 |
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