CN109667740B

CN109667740B - Double-rotor bidirectional variable pump or motor

Info

Publication number: CN109667740B
Application number: CN201811385369.3A
Authority: CN
Inventors: 柳平; 邓涛; 刘东亮; 苗卓广; 赵树恩; 黄萌; 延黎
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2018-11-20
Filing date: 2018-11-20
Publication date: 2021-03-02
Anticipated expiration: 2038-11-20
Also published as: CN109667740A

Abstract

The invention discloses a birotor bidirectional variable pump or motor.A central axis of a first accommodating cavity and a central axis of a second accommodating cavity are intersected and an included angle between the central axes is adjustable; the tail end of the first plunger piston and the tail end of the second plunger piston are hinged in a one-to-one correspondence mode, and all hinged rotating centers are located on an angular bisector of the included angle; the invention utilizes the V-shaped base body structure with adjustable included angle to realize the adjustability of the working volume of the pump or the motor, so that the discharge capacity of the whole V-shaped pump can realize the stepless adjustment of the positive and negative volumes under the condition of not changing the rotation direction and the working liquid path, thereby realizing the stepless adjustment and the function switching of the functions of the pump and the motor under the same working condition.

Description

Double-rotor bidirectional variable pump or motor

Technical Field

The invention relates to the field of transmission driving, in particular to a dual-rotor bidirectional variable pump or motor.

Background

Hydraulic motor and hydraulic pump belong to reversible fluid machinery, belong to energy, pharmaceutical chemical industry, equipment manufacturing etc. many fields comparatively common equipment. In the traditional hydraulic motor and hydraulic pump, a plunger is used as an energy conversion part, the reciprocating motion of the plunger is realized by utilizing the inclination angle of a swash plate, the suction and the output of liquid are realized, and the flow of the hydraulic motor is opposite; the plunger pump (or hydraulic motor) of this structure realizes the regulation of flow through adjusting the inclination angle of swash plate. The pump or hydraulic motor with the structure has asymmetric load design, the system is large in abrasion, the friction loss caused by difficult lubrication between the swash plate and the slipper is large, the adverse load is large when the flow rate of the axial flow distribution mechanism is large, the whole displacement of the space waste at the swash plate end is small, and the overturning moment can not be effectively overcome by the cantilever structure.

Therefore, the existing pump or hydraulic motor needs to be improved, the same or a slightly larger volume can provide larger processing capacity and improve efficiency, reduce system friction energy loss and system wear, balance symmetrical load configuration, reduce system discharge capacity and enhance the capacity of overcoming overturning moment, meanwhile, bidirectional stepless regulation of flow can be realized, bidirectional functions (namely, the exchange of an inlet and an outlet in the flowing direction of a medium and the function conversion of the pump and the motor) are realized, and the pump or hydraulic motor is suitable for different requirements of various fields and has better adaptability.

Disclosure of Invention

In view of the above, the present invention provides a dual-rotor bidirectional variable pump or motor, which can provide a larger processing capacity and improve efficiency, balance symmetrical load configuration, reduce system friction energy loss and system wear, reduce system discharge capacity, and enhance the capacity of overcoming overturning moment with the same or a slightly larger volume, and can realize bidirectional stepless regulation of flow rate, and realize bidirectional functions (i.e., exchange of inlet and outlet in the flow direction of a medium, and function conversion between a pump and a motor).

The invention discloses a dual-rotor bidirectional variable pump or motor, which comprises a first base body and a second base body, wherein the first base body and the second base body are correspondingly provided with a first accommodating cavity and a second accommodating cavity;

the central axis of the first accommodating cavity is intersected with the central axis of the second accommodating cavity, and the included angle is adjustable; the plunger assembly comprises a first plunger matched with a first plunger cavity and a second plunger matched with a second plunger cavity, the tail end of the first plunger and the tail end of the second plunger are hinged in a one-to-one correspondence mode, and all hinged rotating centers are located on an angular bisector of an included angle.

And the angle adjusting driving assembly is used for driving the first base body and the second base body to swing relatively, so that the first accommodating cavity and the second accommodating cavity swing relatively in a reciprocating mode around the vertex of the included angle and on the plane where the included angle is located.

Further, first base member relatively fixed, angle modulation drive assembly include the rack and with rack toothing the segmental arc gear that is formed by one section circular arc, the rotatory central line of segmental arc gear and second hold the swing central line coincidence in chamber and be fixed in the second and hold the second base member that the chamber was located, thereby the rack can be set up by drive reciprocating motion's mode and drive segmental arc gear rotation and drive the driven messenger of second base member thereby first the central axis that holds the chamber and the second hold the contained angle between the central axis in chamber adjustable.

Furthermore, the hinging mode between the tail end of the first plunger and the tail end of the corresponding second plunger is a spherical hinge.

Furthermore, the device also comprises a first central shaft which is coaxially and rotationally matched with the first rotor cylinder body and a second central shaft which is coaxially and rotationally matched with the second rotor cylinder body, wherein the opposite end parts of the first central shaft and the second central shaft are hinged and matched to ensure that the first central shaft and the second central shaft can reciprocate in the plane of the included angle.

Further, the articulated mode between first center pin and the second center pin is the ball pivot, be equipped with first spacing spring between the work tip of first plunger and the first plunger chamber end, be equipped with the spacing spring of second between the work tip of second plunger and the second plunger chamber end, the pretightning force of first spacing spring equals and is in pretightning force when the contained angle is 180 offsets.

Furthermore, the first central shaft and the second central shaft are hinged by a shaft hinge, a central limiting ring is arranged at the hinged position of the tail end of the first central shaft and the tail end of the corresponding second central shaft, the central plane of the central limiting ring is overlapped with the angle bisector of the included angle along with the change of the included angle between the first accommodating cavity and the second accommodating cavity, and an annular groove with an arc-shaped cross section is formed on the outer circumference of the central limiting ring; the outer surface of the spherical hinge structure between the tail end of the first plunger and the tail end of the corresponding second plunger is a spherical surface concentric with the hinge center, and the spherical surface is embedded in the annular groove in a form-fitting manner.

Further, a first stator winding is arranged on the first base body and corresponds to the excircle of the first rotor cylinder body, and first magnetic steel is distributed on the first rotor cylinder body and corresponds to the first stator winding to form a first motor or a generator; or/and a second stator winding is arranged on the second base body corresponding to the excircle of the second rotor cylinder body, and second magnetic steel is distributed on the second rotor cylinder body and the second stator winding correspondingly to form a second motor or a generator.

Further, an assembly base body is formed by fixing the assembly base body relative to the first base body, a cavity for accommodating the second base body is formed in the assembly base body, and a slide way for supporting the rack to slide back and forth is further formed in the assembly base body; the first rotor cylinder body is provided with a rotating shaft axially extending out of the first base body, and the first central shaft coaxially rotates, matches and extends to be sleeved in the rotating shaft to form a support; a second central shaft extends axially out of the second rotor cylinder and to the second base.

Furthermore, the first base body and the second base body are respectively provided with a flow distribution part, the first rotor cylinder body and the second rotor cylinder body are respectively provided with a liquid distribution port correspondingly communicated with the first plunger cavity and the second plunger cavity, the flow distribution part comprises a liquid inlet part, a liquid outlet part and a supporting seat, the liquid inlet part and the liquid outlet part of the flow distribution part of the first base body are respectively positioned at two radial sides of the first accommodating cavity and are respectively arranged at two sides of a plane where an included angle between the central axis of the first accommodating cavity and the central axis of the second accommodating cavity is positioned; the liquid inlet part and the liquid outlet part of the flow distribution part of the second base body are respectively positioned at two radial sides of the second accommodating cavity and are respectively arranged at two sides of a plane where an included angle between the central axis of the first accommodating cavity and the central axis of the second accommodating cavity is positioned; the first rotor cylinder body and the second rotor cylinder body are supported on the corresponding supporting seats, so that the corresponding liquid inlet part and the corresponding liquid outlet part are isolated along the circumferential direction of the corresponding first rotor cylinder body and the second rotor cylinder body;

or the first base body or the second base body is provided with a flow distribution part, a liquid distribution port correspondingly communicated with the first plunger cavity or the second plunger cavity is formed in the first rotor cylinder body or the second rotor cylinder body, the flow distribution part comprises a liquid inlet part, a liquid outlet part and a supporting seat, the liquid inlet part and the liquid outlet part of the flow distribution part are respectively positioned on two radial sides of the first accommodating cavity or the second accommodating cavity and are respectively arranged on two sides of a plane where an included angle between the central axis of the first accommodating cavity and the central axis of the second accommodating cavity is positioned, and the first rotor cylinder body or the second rotor cylinder body is supported on the supporting seat so that the liquid inlet part and the liquid outlet part are isolated along the circumferential direction of the first rotor cylinder body or the second rotor cylinder body; the first plunger and the second plunger are hollow and correspondingly communicated with each other and penetrate through the top of the plungers to form a flow distribution channel.

The invention has the beneficial effects that: the invention relates to a dual-rotor bidirectional variable pump or motor, which utilizes a V-shaped base body structure with an adjustable included angle to realize the adjustability of the working volume of the pump or motor, so that the discharge capacity of the whole V-shaped pump can realize the stepless adjustment of positive and negative volumes under the condition of not changing the rotation direction and a working liquid path, thereby realizing the stepless adjustment and function switching of the functions of the pump or motor under the same working condition, compared with the prior pump and motor, the invention can provide larger processing capability and improve the efficiency by adopting the same or slightly larger volume, reduce the friction energy loss and system abrasion of a system, balance and symmetrical load configuration to offset unfavorable load, reduce the discharge flow of the system and enhance the capability of overcoming overturning moment, can carry out stepless flow adjustment, realize the bidirectional function (namely the exchange of the flow direction of a medium and the function switching of the pump and the motor), in addition, can be integrated into an electromechanical integrated design according to requirements, realizes the three-phase energy exchange of machine, electricity and liquid, is suitable for different requirements of various fields, and has better adaptability

Drawings

The invention is further described below with reference to the following figures and examples:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the present invention using a retaining ring;

FIG. 3 is a schematic structural view of a first rotor cylinder according to the present invention (with magnetic steel);

FIG. 4 is a schematic view of the structure of the receiving chamber of the present invention (with windings);

FIG. 5 is a central axis hinge perspective view of the present invention employing a stop ring configuration;

FIG. 6 is a schematic view of a first central shaft (with bevel gear) according to the present invention;

FIG. 7 is a schematic view of a second central shaft (with bevel gear) according to the present invention;

FIG. 8 is a schematic view of a stopper ring structure (with pinion) according to the present invention;

FIG. 9 is a schematic view of a flow distribution mechanism;

FIG. 10 is a schematic view of a configuration having a flow-distribution channel in the plunger;

FIG. 11 is a schematic diagram of external distribution;

fig. 12 is a schematic diagram of the flow distribution in the plunger.

Detailed Description

As shown in the figure, the birotor bidirectional variable pump or motor comprises a first base body 1 and a second base body 2, wherein the first base body 1 and the second base body 2 are correspondingly provided with a first accommodating cavity and a second accommodating cavity, a first rotor cylinder body 3 and a second rotor cylinder body 4 are correspondingly and rotatably arranged in the first accommodating cavity and the second accommodating cavity, the first rotor cylinder 3 and the second rotor cylinder 4 are eccentrically provided with a first plunger chamber 31 and a second plunger chamber 32 respectively, as shown in the figure, the first rotor cylinder 3 and the second rotor cylinder 4 are respectively rotatably disposed by corresponding bearings (including angular contact bearings or thrust bearings, as shown in the figure, disposed on the corresponding first base 1 and second base 2 by angular contact bearings 24 and 17, the two angular contact bearings are outward thrust relative to the axial force bearing direction of the first rotor cylinder 3 and the second rotor cylinder 4); in practical use, the first plunger cavity 31 and the second plunger cavity 32 generally correspond to a plurality of cavities respectively and surround the center line of the first rotor cylinder 3 and the center line of the second rotor cylinder 4, and the axial position of the plunger in the plunger cavity is changed (due to eccentric arrangement and included angle) through the active or passive rotation of the first rotor cylinder 3 and the second rotor cylinder 4, so as to form a high-efficiency pump or motor, but the plurality of first plunger cavities and the plurality of second plunger cavities form a one-to-one corresponding relationship, and the description is omitted herein;

the central axis of the first accommodating cavity is intersected with the central axis of the second accommodating cavity, and the included angle is adjustable; the included angle is adjustable, namely the included angle between the first containing cavity and the second containing cavity can be changed by adjusting the relative position, and the adjustment is generally realized by adjusting the direction between the first base body 1 and the second base body 2, of course, the first containing cavity and the second containing cavity are not excluded to be adjustable relative to the first base body and the second base body, so that the adjustment is realized; the plunger assembly comprises a first plunger 5 matched with the first plunger cavity and a second plunger 6 matched with the second plunger cavity, the tail end of the first plunger 5 is hinged with the tail end of the second plunger 6 in a one-to-one correspondence mode, and all hinged rotation centers are located on an angular bisector of the included angle; in the structure of the invention, the central axis of the first containing cavity and the central axis of the second containing cavity are intersected to form an included angle which is a V-shaped structure, under the action of the plunger assembly, the first rotor cylinder body and the second rotor cylinder body synchronously rotate, the maximum stroke of the plunger in the plunger cavity can be changed through the change of the included angle, when the included angle is reduced, the stroke of the plunger in the plunger cavity is prolonged, the included angle is increased to 180 degrees, the stroke is gradually reduced to zero, when the included angle is adjusted to be larger than 180 degrees (or negative angle), the liquid flow direction of the pump or the motor is opposite (the outlet and the inlet are interchanged), and the function conversion (the mutual conversion of the pump and the motor) is realized, so that the structure has a more flexible adjusting; of course, the structure of the plunger may be replaced by a piston plus a piston rod, and belongs to equivalent replacement, and the description is omitted here.

In the embodiment, the device further comprises an angle adjusting driving assembly which is used for driving the first base body 1 and the second base body 2 to swing relatively, so that the first accommodating cavity and the second accommodating cavity swing relatively around the vertex of the included angle and swing relatively and reciprocally on the plane where the included angle is located, the angle adjusting driving assembly is used for driving the first base body 1 or/and the second base body 2 to change the direction, so that the first accommodating cavity or/and the second accommodating cavity swing relatively to change the included angle, and a high automation effect is achieved; the driving component can be a hydraulic drive, a worm gear or a gear rack, and the aim of the invention can be achieved.

In the embodiment, the first substrate 1 is relatively fixed, and the relative fixation refers to fixation relative to a shell or an external fixed object; the angle adjusting driving assembly comprises a rack 19 and an arc-section gear 18 which is meshed with the rack and formed by a section of arc, the rotating central line of the arc-section gear 18 is overlapped with the swinging central line of the second accommodating cavity and is fixed on the second base body 2 where the second accommodating cavity is located, and the rack 19 can be arranged in a driving reciprocating motion mode and drives the arc-section gear 18 to rotate so as to drive the second base body to be driven, so that the included angle between the central axis of the first accommodating cavity and the central axis of the second accommodating cavity can be adjusted; the arc-segment gear is driven to rotate through the reciprocating motion of the rack, so that the second accommodating cavity is driven to swing within a set angle range, and the purposes of finally adjusting the flow and converting the function are achieved; the arc-segment gear can easily adjust the positive and negative angles, and has simple structure and low cost; in the scheme, the rack and the base structure of the pump or the motor form reciprocating fit, and a corresponding linear bearing can be arranged for smooth reciprocating motion, which is not described again; in fact, the range of the final included angle adjustment is determined according to the set rotation angle through the rack driving gear, and the final included angle adjustment can be automatically realized; the rack can be driven electrically, hydraulically or by a lead screw, and the like, in this embodiment, the driving is realized by hydraulic pressure, the control of the hydraulic mechanism is realized by the control module 21, and the reciprocating sliding of the rack is controlled by the hydraulic control principle, which is not described herein again.

In this embodiment, the hinge connection between the tail end of the first plunger 5 and the tail end of the corresponding second plunger 6 is a spherical hinge 15, which has flexible adaptive ability, and can change the angle and perform proper rotation at the same time, thereby ensuring smooth operation of the mechanism; the universal joint structure can also be used for achieving the purpose of the invention, and has larger bearing capacity.

In the embodiment, the device further comprises a first central shaft 7 coaxially and rotatably arranged on the first rotor cylinder 3 and a second central shaft 8 coaxially and rotatably arranged on the second rotor cylinder 4, wherein the opposite ends of the first central shaft 7 and the second central shaft 8 are hinged and matched to enable the first central shaft and the second central shaft to swing back and forth in a plane where the included angle is located; of course, the first central shaft is axially positioned relative to the first rotor cylinder (the positioning means that the first central shaft is axially fixed and the first central shaft is circumferentially rotatable and can be implemented by using the existing mechanical means, such as appropriately arranging a plane bearing, an angular contact bearing, etc.), and the second central shaft is axially positioned relative to the second rotor cylinder; as shown, the first central shaft and the second central shaft are rotationally engaged and axially and relatively positioned and rotationally engaged in the circumferential direction through the bearing assembly, as shown in the figure, the first central shaft and the second central shaft are rotationally engaged and positioned with the first rotor cylinder 3 and the second rotor cylinder 4 through the corresponding angular contact bearings 23 and 16, respectively, the axial force to the first central shaft and the second central shaft is an outward thrust, and here and the aforementioned outward means outward relative to the two axial sides of the hinge angle bisector, and will not be described herein again.

In this embodiment, the hinge connection between the first central shaft 7 and the second central shaft 8 is a spherical hinge 22, a first limiting spring 9 is arranged between the working end of the first plunger 5 and the end of the first plunger cavity 31, a second limiting spring 10 is arranged between the working end of the second plunger 6 and the end of the second plunger cavity 32, the pretightening force of the first limiting spring is equal to the pretightening force of the second limiting spring, and the pretightening forces when the included angle is 180 ° are balanced, of course, the pretightening force of the pretightening spring does not generate the pretightening force when the plunger is at the bottom dead center, and the pretightening force is not generally set at this time; in this embodiment, preferably, when the included angle is 180 degrees, the pre-tightening force is zero, which means that when the included angle is adjusted to 180 degrees, the first limiting spring and the second limiting spring just disengage from the pre-tightening force, and both ends of the first limiting spring and the second limiting spring are also abutted against the top of the corresponding plunger and the head of the plunger cavity; when the included angle is 180 degrees, the structure ensures that the pretightening force applied to the two ends of the first plunger and the second plunger is equal or zero at the same time, and further ensures that all the hinge centers between the first plunger and the second plunger are positioned in the same angle division plane (when the angle is adjusted).

Of course, the following structures are also possible: as shown in fig. 3, the hinge connection between the first central shaft 7 'and the second central shaft 8' is an axial hinge, and in order to ensure that the hinge centers between all the first plungers 5 and all the second plungers 6 (i.e. the hinge centers between the other first plungers and the other second plungers) are in the same angular division plane, the following structure may also be adopted; namely, a central limiting ring 26 is arranged at the hinged position of the tail end of the first central shaft 7 'and the tail end of the corresponding second central shaft 8', along with the change of the included angle between the first accommodating cavity and the second accommodating cavity, the central plane of the central limiting ring 26 (i.e. the radial section of the central limiting ring which is parallel to the two annular surfaces and is positioned between the two annular surfaces) and the angular bisector of the included angle are kept coincident, and an annular groove with an arc-shaped cross section is formed on the outer circumference of the central limiting ring 26; the outer surface of the spherical hinge structure between the tail end of the first plunger 5 and the tail end of the corresponding second plunger 6 is a spherical surface concentric with the hinge center, and the spherical surface is embedded in the annular groove in a shape-fitting manner (contained in the annular groove by the movable half part), so that the mechanical limiting effect is realized, and the smooth operation of the mechanism is ensured; the specific structure is as shown in the figure, the tail end of the first central shaft 7 'is hinged to the tail end of the corresponding second central shaft 8' through a hinge shaft 30, and two ends of the hinge shaft 30 are connected to the central limiting ring 26, of course, the axis of the hinge shaft 30 passes through the center of the central limiting ring, and generally adopts a fixed connection manner (as shown in the figure, two ends of the hinge shaft 30 form flat shafts which are embedded in flat grooves formed by the central limiting ring to form connection); a pinion 29 (small umbrella-shaped teeth) is fixedly arranged on the hinge shaft 30, a hinge groove is arranged at the tail end of the first central shaft 7 ', a hinge tenon is arranged on the second central shaft 8', umbrella-shaped outer gear rings (an umbrella-shaped outer gear ring 28 on the hinge groove and an umbrella-shaped outer gear ring 27 on the hinge tenon are respectively arranged on the hinge groove and the hinge tenon in a manner of being relatively coaxial with the hinge center respectively, four pinions 29 on the hinge shaft 30 are uniformly distributed on the circumference, of course, a plurality of pinions can be uniformly distributed on the circumference, and the pinions are clamped between the two umbrella-shaped outer gear rings and are respectively meshed with the two umbrella-shaped outer gear rings; the small gear is engaged with the two umbrella-shaped outer gear rings in a T-shaped manner, the first central shaft 7 'and the second central shaft 8' are driven by the outer gear rings to move when moving relatively, so that the central limiting ring is kept still (the first central shaft 7 'and the second central shaft 8' move simultaneously to change the included angle) or the half-angle follow-up (one of the first central shaft 7 'and the second central shaft 8' moves to change the included angle) is always positioned on an angular bisector, and the plunger spherical pair is in shape-conforming tangency with the groove surface of the central positioning ring; when the pump is in non-zero displacement (with included angle), the spherical pair has no axial movement trend, and the central positioning ring does not work; when the pump is at zero displacement (coaxial), the central positioning ring plays a limiting role, and the spherical pair is kept on the angular bisector, so that the plunger pump can be freely switched in the positive and negative directions, and the stepless regulation of the displacement of the plunger pump and the free change of the functions of the pump and the motor are realized.

In this embodiment, a first stator winding 11 is arranged on the first base 1 corresponding to the outer circle of the first rotor cylinder 3, first magnetic steels 13 are distributed on the first rotor cylinder 3 corresponding to the first stator winding, and the magnetic steels are distributed to form a first motor or a generator based on the formation of the generator or the motor; or/and a second stator winding 12 is arranged on the second base body 2 corresponding to the excircle of the second rotor cylinder 3, and second magnetic steels 14 are distributed on the second rotor cylinder 4 corresponding to the second stator winding 12 to form a second motor or a generator; of course, the distribution rule of the second magnetic steel 14 is also based on the formation of a motor or a generator; the generator or the motor can play a corresponding role no matter in the state of the pump or the motor; as a pump, the formed motor can be directly used for driving, and as a motor, the motor can collect redundant energy to generate electricity and store electric energy, which is not described herein; the generator or the motor with the structure is integrated in the pump body or the motor, and has the characteristics of compact structure and small occupied space, so that the manufacturing and using cost is saved.

In this embodiment, an assembly base body 20 is fixed opposite to the first base body 1, the assembly base body 20 forms a cavity for accommodating the second base body 2, and the assembly base body 20 further forms a slide way for supporting the rack to slide back and forth; as shown in the figure, the first substrate is integrally formed to form a framework (assembly substrate), a cavity for placing the second substrate 2 is formed in the framework, a base structure is formed behind the framework, the slide way is formed in the base, and the hydraulic control module 21 and the hydraulic flow passage are also arranged in the base structure, so that the structure is simple and compact; the first rotor cylinder body 3 is provided with a rotating shaft 25 axially extending out of a first base body, and the first central shaft 7 coaxially and rotatably matches with and extends into a hollow shaft sleeve formed by sleeving the rotating shaft 25 to form a support; the second central shaft 8 axially extends out of the second rotor cylinder 4 and extends into a supporting seat formed by the second base body 2, and the purpose of the invention can be realized by adopting a fixed mode or unfixed (the purpose can also be realized by rotating and matching), and the second central shaft is generally a fixed structure; when a central limit ring structure is arranged at the hinged position of the tail end of the first central shaft 7 and the tail end of the corresponding second central shaft 8, the second central shaft 8 axially extends out of the second rotor cylinder body and extends to a support seat formed by the second substrate to form a fixed structure.

As shown in the figure, the whole structure is cylindrical and mutually sleeved from outside to inside, and forms rotation or fixed fit according to the requirement, so that the structure is compact; the rotating shaft structure can output power outwards or access power from the outside, and the use is flexible and convenient.

In this embodiment, the first substrate 1 and the second substrate 2 are respectively provided with a flow distribution portion, and the specific principle is as shown in fig. 9; the first rotor cylinder 3 and the second rotor cylinder 4 are respectively provided with a

liquid distribution port

33, 34 correspondingly communicated with the first plunger cavity 31 and the second plunger cavity 32, the liquid distribution part comprises a liquid inlet part, a liquid outlet part and a supporting seat 35, the liquid inlet part is provided with a liquid inlet 37, the liquid outlet part is provided with a liquid outlet 36, of course, the liquid inlet part and the liquid outlet part are interchanged according to the adjustment of the included angle, the liquid flow direction is reversed, and the functions of a pump or a motor are switched; the liquid inlet part and the liquid outlet part of the flow distribution part of the first base body 1 are respectively positioned at two radial sides of the first accommodating cavity and are respectively arranged at two sides of a plane where an included angle between the central axis of the first accommodating cavity and the central axis of the second accommodating cavity is positioned; the liquid inlet part and the liquid outlet part of the flow distribution part of the second base body 2 are respectively positioned at two radial sides of the second accommodating cavity and are respectively arranged at two sides of a plane where an included angle between the central axis of the first accommodating cavity and the central axis of the second accommodating cavity is positioned; the first rotor cylinder 3 and the second rotor cylinder 4 are supported on the corresponding supporting seats 35, so that the corresponding liquid inlet part and the corresponding liquid outlet part are isolated along the circumferential direction of the corresponding first rotor cylinder 3 and the second rotor cylinder 4; the operation principle of the first base body and the second base body respectively provided with the flow distribution parts is shown in fig. 11, wherein a represents an assembly of the first base body, b represents an assembly of the second base body, black arrows represent liquid inlet, and white arrows represent liquid outlet.

Of course, a structure in which a flow distribution mechanism is disposed at one end (that is, a structure in which a flow distribution mechanism is disposed in one of the first rotor cylinder 3 or the second rotor cylinder 4) may also be employed, and the specific principle is as shown in fig. 12, an assembly a 'of the first base or an assembly b' of the second base is provided with a flow distribution portion (only the first base is provided with the flow distribution portion in this embodiment), a liquid distribution port correspondingly communicated with the first plunger cavity or the second plunger cavity (the first plunger cavity in this embodiment) is formed on the first rotor cylinder or the second rotor cylinder (the first rotor cylinder in this embodiment), the flow distribution portion includes a liquid inlet portion, a liquid outlet portion and a support seat, the liquid inlet portion, the liquid outlet portion and the support seat are respectively located at two radial sides of the first accommodation cavity, and are respectively located at two sides of a plane where an included angle between a central axis of the first accommodation cavity and; the first rotor cylinder 3 or the second rotor cylinder 4 (in this embodiment, the first rotor cylinder) is supported on the support base so that the liquid inlet part and the liquid outlet part are isolated from each other along the circumferential direction of the first rotor cylinder or the second rotor cylinder (in this embodiment, the first rotor cylinder); the first plunger 5 and the second plunger 6 are hollow and are correspondingly communicated with each other and penetrate through the tops of the plungers to form flow distribution channels 71 and 81; and a flow distribution channel is communicated between the first plunger 5 and the second plunger 6, wherein c' is a liquid flow formed by the flow distribution channel, so that the first plunger cavity 31 and the second plunger cavity 32 are communicated through the flow distribution channel for ensuring the normal operation of the two plunger cavities, and certainly, corresponding sealing arrangement (the ball hinge has a sealing effect) is required at the ball hinge structure between the first plunger and the second plunger, so that the structure reduces one flow distribution mechanism, the working procedures and the cost are reduced in design, manufacture and assembly, and the volume and the weight of the whole equipment structure are reduced.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. A bi-directional variable pump or motor with dual rotors is characterized in that: the piston assembly comprises a piston assembly, a first base body and a second base body, wherein a first accommodating cavity and a second accommodating cavity are correspondingly arranged on the first base body and the second base body, a first rotor cylinder body and a second rotor cylinder body are correspondingly and rotatably arranged in the first accommodating cavity and the second accommodating cavity, and a first plunger cavity and a second plunger cavity are eccentrically arranged in the first rotor cylinder body and the second rotor cylinder body respectively;

the central axis of the first accommodating cavity is intersected with the central axis of the second accommodating cavity, and the included angle between the central axes is adjustable; the plunger assembly comprises a first plunger matched with the first plunger cavity and a second plunger matched with the second plunger cavity, the tail end of the first plunger is hinged with the tail end of the second plunger in a one-to-one correspondence mode, and all hinged rotating centers are located on an angular bisector of the included angle;

the angle adjusting driving assembly is used for driving the first base body and the second base body to swing relatively, so that the first accommodating cavity and the second accommodating cavity swing relatively and reciprocally around the vertex of the included angle and on the plane where the included angle is located;

the hinging mode between the tail end of the first plunger and the tail end of the corresponding second plunger is a spherical hinge;

the first central shaft is coaxially and rotationally matched with the first rotor cylinder body, and the second central shaft is coaxially and rotationally matched with the second rotor cylinder body;

the first central shaft and the second central shaft are hinged in a shaft hinge mode, a central limiting ring is arranged at the hinged position of the tail end of the first central shaft and the tail end of the corresponding second central shaft, along with the change of the included angle of the first accommodating cavity and the second accommodating cavity, the central plane of the central limiting ring is overlapped with the angle bisection plane of the included angle, and an annular groove with an arc-shaped cross section is formed in the outer circumference of the central limiting ring; the outer surface of the spherical hinge structure between the tail end of the first plunger and the tail end of the corresponding second plunger is a spherical surface concentric with the hinge center, and the spherical surface is embedded in the annular groove in a form-fitting manner.

2. The dual rotor, bi-directional variable pump or motor of claim 1, wherein: first base member relatively fixed, angle modulation drive assembly include the rack and with rack toothing the segmental arc gear that is formed by one section circular arc, the rotatory central line of segmental arc gear and second hold the swing central line coincidence in chamber and be fixed in the second and hold the second base member that the chamber was located, thereby the rack can be set up by drive reciprocating motion's mode and drive segmental arc gear revolve and drive the second base member driven, makes the first central axis that holds the chamber and the second hold the contained angle between the central axis in chamber adjustable.

3. The dual rotor, bi-directional variable pump or motor of claim 1, wherein: a first stator winding is arranged on the first base body and corresponds to the excircle of the first rotor cylinder body, and first magnetic steel is distributed on the first rotor cylinder body and corresponds to the first stator winding to form a first motor or a generator; or/and a second stator winding is arranged on the second base body corresponding to the excircle of the second rotor cylinder body, and second magnetic steel is distributed on the second rotor cylinder body and the second stator winding correspondingly to form a second motor or a generator.

4. The dual rotor, bi-directional variable pump or motor of claim 1, wherein: the assembly base body is fixed relative to the first base body to form an assembly base body, a cavity for accommodating the second base body is formed in the assembly base body, and a slide way for supporting the rack to slide in a reciprocating mode is further formed in the assembly base body; the first rotor cylinder body is provided with a rotating shaft axially extending out of the first base body, and the first central shaft coaxially rotates, matches and extends to be sleeved in the rotating shaft to form a support; a second central shaft extends axially out of the second rotor cylinder and to the second base.

5. The dual rotor, bi-directional variable pump or motor of claim 1, wherein: the first base body and the second base body are respectively provided with a flow distribution part, liquid distribution ports correspondingly communicated with the first plunger cavity and the second plunger cavity are formed in the first rotor cylinder body and the second rotor cylinder body respectively, the flow distribution part comprises a liquid inlet part, a liquid outlet part and a supporting seat, the liquid inlet part and the liquid outlet part of the flow distribution part of the first base body are respectively positioned on two radial sides of the first accommodating cavity and are respectively arranged on two sides of a plane where an included angle between the central axis of the first accommodating cavity and the central axis of the second accommodating cavity is positioned; the liquid inlet part and the liquid outlet part of the flow distribution part of the second base body are respectively positioned at two radial sides of the second accommodating cavity and are respectively arranged at two sides of a plane where an included angle between the central axis of the first accommodating cavity and the central axis of the second accommodating cavity is positioned; the first rotor cylinder body and the second rotor cylinder body are supported on the corresponding supporting seats, so that the corresponding liquid inlet part and the corresponding liquid outlet part are isolated along the circumferential direction of the corresponding first rotor cylinder body and the second rotor cylinder body;

6. A bi-directional variable pump or motor with dual rotors is characterized in that: the piston assembly comprises a piston assembly, a first base body and a second base body, wherein a first accommodating cavity and a second accommodating cavity are correspondingly arranged on the first base body and the second base body, a first rotor cylinder body and a second rotor cylinder body are correspondingly and rotatably arranged in the first accommodating cavity and the second accommodating cavity, and a first plunger cavity and a second plunger cavity are eccentrically arranged in the first rotor cylinder body and the second rotor cylinder body respectively;

the articulated mode between first center pin and the second center pin is the ball pivot, be equipped with first spacing spring between the work tip of first plunger and the first plunger chamber end, be equipped with the spacing spring of second between the work tip of second plunger and the second plunger chamber end, the pretightning force of first spacing spring equals and is in pretightning force when contained angle is 180 offsets.