Double-rotor composite motor pump

Abstract

The invention provides a double-rotor composite motor pump which comprises two end covers, a rotating shaft, two valve plates, a shell, an outer rotor, a driving structure, a plunger, a cylinder body and an inner rotor, the two valve plates are connected to the inner sides of the two end covers, the shell is arranged between the two valve plates, the inner sides of the two valve plates are connected with the cylinder body, and the outer rotor is connected with the outer rotor. The two sides of the rotating shaft penetrate out of the two ends of the valve plate and are rotationally connected with the two end covers. The inner rotor is connected to the rotating shaft, the two sides of the outer rotor are rotationally connected between the cylinder body and the shell, and the driving structure is connected between the inner rotor and the outer rotor. Inclined faces are arranged on the two sides of the inner rotor and the two sides of the outer rotor, a plurality of plungers are connected to the cylinder body, and the plungers on the two sides are connected with the inclined faces on the two sides of the inner rotor and the two sides of the outer rotor. The pump is compact in structure and flexible to control, the magnetic density of the motor can be increased, the overall power density can be improved, radial expansion can be achieved, a multi-rotor topological structure is achieved, and the displacement of the pump is improved; pulsation and vibration can be effectively reduced, working efficiency and energy utilization are improved, pressure is balanced, and the service life of the motor pump is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of motor pumps, and in particular to a dual-rotor compound motor pump. Background Art

[0002] As the power source for driving pumps, motors play a vital role in aerospace, industrial manufacturing and many other fields. The traditional motor pump layout usually adopts the series form of "motor + coupling + pump". Although this structure meets the basic driving needs to a certain extent, it also has many inherent defects. Specifically, this traditional structure is often bulky and occupies a lot of space, which is not conducive to the lightweight and compact design of the equipment. At the same time, due to the long transmission chain, there is a large power loss in the energy transmission process, which reduces the overall efficiency of the system.

[0003] In order to meet these challenges, the motor pump system has gradually developed in the direction of integration and integration. Under this trend, researchers have explored a variety of innovative integration solutions. Among them, the radially integrated motor pump system is a design idea with great potential. This solution achieves a highly compact structure by tightly integrating the motor and the pump in the radial direction, effectively reducing the size and weight of the equipment. At the same time, the design of the shared rotor structure of the two also reduces the intermediate transmission links, reduces power loss, and improves the overall efficiency of the system.

[0004] However, the radially integrated motor pump system also faces some technical difficulties during the design process. In particular, the sealing problem of the pump shaft oil has become one of the key factors restricting its performance improvement. In order to prevent oil leakage, the system needs to be equipped with a rotary dynamic seal. However, the rotary dynamic seal not only increases the complexity and manufacturing cost of the system, but also may shorten its life due to friction and wear, increasing the difficulty and cost of maintenance. In addition, whether it is radial integration or other forms of integration, the structure of the motor and pump needs to be comprehensively considered and redesigned to ensure the perfect match between the two in terms of performance and structure.

[0005] Therefore, the present invention aims to provide an innovative motor pump design solution to solve the problems existing in the prior art and meet the urgent needs of aerospace and other fields for efficient, compact and lightweight power systems. Summary of the invention

[0006] In response to the above-mentioned technical problem, a dual-rotor compound motor pump is provided.

[0007] The technical means adopted by the present invention are as follows:

[0008] A dual-rotor compound motor pump, comprising: two end covers, a rotating shaft, two distribution plates, a shell, an outer rotor arranged in the shell, a driving structure, a plunger, a cylinder body and an inner rotor, wherein the two end covers are distributed on both sides, the two distribution plates are respectively connected to the inner sides of the two end covers, the shell is connected between the two distribution plates, the inner sides of the two distribution plates are both connected to the cylinder body, the rotating shaft is placed in the shell, each side of the rotating shaft passes through the cylinder body and the distribution plate from the inside to the outside in sequence, and the two ends of the distribution plate on both sides are rotatably connected to the two end covers respectively;

[0009] The inner rotor is connected to the rotating shaft, the outer rotor is sleeved on the outside of the inner rotor, the two sides of the outer rotor are rotatably connected between the cylinder body and the outer shell, and the driving structure is connected between the inner rotor and the outer rotor to drive the inner rotor and the outer rotor to rotate; both sides of the inner rotor and the outer rotor have inclined surfaces, and each cylinder body is connected to a plurality of plungers, and the plungers on both sides are connected to the inclined surfaces on both sides of the inner rotor and the outer rotor;

[0010] A first through hole serving as an oil inlet is opened on both sides of the side wall of the outer shell, and a second through hole connected to the interior of the outer rotor is opened on both sides of the side wall of the outer rotor, and both the first through hole and the second through hole are connected to the space between the outer shell and the outer rotor; the outer wall of the distribution plate is provided with an opening serving as an oil drain port.

[0011] Furthermore, the driving structure includes multiple external permanent magnets, windings, a stator and multiple internal permanent magnets, the two sides of the stator are respectively connected to two cylinder bodies, the inner and outer walls of the stator are wound with windings, the multiple external permanent magnets are circumferentially adsorbed on the inner wall of the outer rotor, and the multiple internal permanent magnets are circumferentially adsorbed on the outer wall of the inner rotor.

[0012] Furthermore, the cylinder body includes an inner cylinder and an outer cylinder, the inner cylinder is arranged inside the outer cylinder, and a plurality of plunger holes distributed circumferentially are opened on the inner cylinder and the outer cylinder, each plunger hole is connected to a plunger, and the plunger performs reciprocating linear motion in the plunger hole.

[0013] Furthermore, a central compression spring is arranged in the plunger hole and connected to the tail of the plunger. The central compression spring ensures that the plunger always clings to the surfaces of the inner rotor and the outer rotor when no external force is applied.

[0014] Furthermore, the plunger comprises a plunger body, a channel is provided inside the plunger body, a through hole communicating with the channel is opened at the head of the plunger body, and a first one-way valve is provided in the channel.

[0015] Furthermore, the head of the plunger body is connected to the inclined surfaces of the inner rotor and the outer rotor through sliding shoes.

[0016] Furthermore, the first one-way valve includes a small ball, a spring and a spiral cover, the spiral cover is connected to the tail of the channel, the two ends of the spiral cover are respectively connected to the small ball and the spiral cover, the small ball is close to the head of the plunger body, and the interior of the spiral cover has a through hole, which is connected to the channel and the plunger hole.

[0017] Furthermore, the interior of the distribution plate is provided with a first annular flow channel and a second annular flow channel along the circumferential direction, and a radial flow channel is provided along a direction parallel to the radial direction; the first annular flow channel and the second annular flow channel are both connected to the radial flow channel, and the radial flow channel is connected to an opening on the distribution plate;

[0018] A plurality of third through holes and a plurality of fourth through holes are provided on one side of the distribution plate close to the cylinder body, the plurality of third through holes are distributed on the outer ring of the plurality of fourth through holes, the plurality of third through holes are connected to the first annular flow channel, and the plurality of fourth through holes are connected to the second annular flow channel;

[0019] A second one-way valve is disposed in each of the third through hole and the fourth through hole.

[0020] Further, the second one-way valve comprises a pressure plate, a ball, a spring and a screw, the screw is connected to the distribution plate, the two ends of the spring are respectively connected to the ball and the screw, and the ball is located between the pressure plate and the spring;

[0021] A first groove is provided on the side of the third through hole close to the cylinder body, and a second groove is provided on the side of the fourth through hole close to the cylinder body. The pressure plate in the third through hole is placed in the first groove, and the pressure plate in the fourth through hole is placed in the second groove. A through hole is opened in the middle of the pressure plate, and the through hole is used to realize the connection between the plunger hole in the cylinder body and the third through hole and the fourth through hole.

[0022] Furthermore, the rotating shaft is connected to the end cover through a rotating shaft bearing, the outer side of the outer rotor is connected to the outer shell through a shell bearing, and the inner side is connected to the cylinder body through a stator bearing;

[0023] Sealing devices are arranged between the two sides of the shell and the two distribution plates.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The dual-rotor composite motor pump provided by the present invention has a compact dual-rotor structure and flexible control, and can achieve multi-stage radial expansion in theory. The motor of the motor pump adopts a dual-rotor structure, and a magnetic stator is arranged in the middle. This design allows the two rotors to operate without interfering with each other, thereby improving the stability and efficiency of the motor. Furthermore, based on the principle of magnetic conductivity of the dual-rotor intermediate stator, it can be further expanded to a radial topological structure. In this structure, a multi-rotor, multi-stator and multi-cylinder configuration can be achieved, which improves the working efficiency and stability of the pump and provides a more efficient and stable fluid transmission solution for a variety of other application scenarios.

[0026] 2. The dual-rotor compound motor pump provided by the present invention has a distribution plate placed between the distribution end surface of the cylinder body and the oil suction and pressure channels of the pump. The design of the distribution plate ensures that the oil suction circuit and the oil pressure circuit can be accurately switched to the correct position at each stage of the plunger movement. When the plunger moves forward, it can suck in liquid; and when the plunger moves backward, it can discharge liquid.

[0027] 3. The dual-rotor composite motor pump provided by the present invention is filled with oil inside and has a sealing device attached to the outer shell to achieve the function of preventing leakage.

[0028] 4. The dual-rotor compound motor pump provided by the present invention improves the oil suction and discharge efficiency of the pump and realizes the coordinated movement of multiple rotors and multiple cylinders.

[0029] Based on the above reasons, the present invention can be widely promoted in the fields of aerospace and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is a two-dimensional cross-sectional view of the dual-rotor compound motor pump of the present invention.

[0032] Figure 2 It is a cross-sectional view of the motor unit of the dual-rotor compound motor pump of the present invention.

[0033] Figure 3 This is a pump unit diagram of the dual-rotor compound motor pump of the present invention.

[0034] Figure 4 This is a view of the plunger assembly of the present invention.

[0035] Figure 5It is a schematic diagram of the structure of the sliding shoe, the plunger and the cylinder body of the present invention.

[0036] Figure 6 It is a schematic diagram of oil flow when the dual-rotor compound motor pump of the present invention is working.

[0037] Figure 7 It is a three-dimensional cross-sectional view of the outer rotor of the dual-rotor composite motor pump of the present invention.

[0038] Figure 8 It is a schematic diagram of the three-dimensional structure of the stator of the dual-rotor composite motor pump of the present invention.

[0039] Fig. 9 It is a two-dimensional cross-sectional view of the stator of the dual-rotor composite motor pump of the present invention and a schematic diagram of the liquid flow direction.

[0040] In the figure: 1, end cover; 2, housing bearing; 3, rotating shaft; 4, rotating shaft bearing; 5, stator bearing; 6, housing; 7, outer rotor; 8, stator; 9, plunger; 10, plunger body; 91, small ball; 92, spring; 93, screw cover; 11, distribution plate; 12, first one-way valve; 13, second one-way valve; 14, inner cylinder; 15, outer cylinder; 16, outer permanent magnet; 17, winding; 18, inner rotor; 19, inner permanent magnet; 20, center compression spring; 21, sealing ring. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0048] The present invention provides a dual-rotor composite motor pump, which is particularly focused on special application scenarios in the aerospace field that require highly integrated design and high power density. With the rapid development of aerospace technology, the requirements for power systems are getting higher and higher, which not only require powerful driving capabilities, but also need to meet multiple standards such as lightweight, compactness and high efficiency. Therefore, the present invention is committed to providing an innovative motor pump solution to meet the specific needs of this field.

[0049] The dual-rotor compound motor pump of the present invention is divided into two inner and outer rotors, which correspond to the inner and outer cylinders respectively. This double-layer structure not only improves the working efficiency of the pump, but also makes the entire system more compact and stable. The inner and outer rotors of the present invention are used as swash plate rotors to achieve rapid suction and discharge of oil. In theory, the topological structure of the inner and outer rotors of the motor can be increased to achieve an increase in the pump displacement.

[0050] The purpose of the present invention is to use a motor pump to perform oil suction and oil discharge. In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the following is combined with the attached Figures 1 to 9 Provide explanation.

[0051] like Figure 1 As shown in the figure, it is a two-dimensional cross-section of the dual-rotor compound motor pump of the present invention. The positional relationship of each component can be clearly seen from the figure. The motor pump of the present invention mainly includes two end covers 1, a rotating shaft 3, a motor stator 8, inner and outer rotors (inner rotor 18, outer rotor 7), inner and outer permanent magnets (inner permanent magnet 19, inner permanent magnet 19), a cylinder body, a sliding shoe, a plunger 9, two distribution plates 11, a one-way valve inside the plunger 9 and inside the distribution plate 11, a housing 6, a bearing and other structures, an outer rotor 7, an outer permanent magnet 16, a winding 17, a stator 8, a plurality of inner permanent magnets 19, a plunger 9, a cylinder body and an inner rotor 18 are arranged in the housing 6, and the outer permanent magnet 16, the winding 17, the stator 8, and a plurality of inner permanent magnets 19 constitute a driving structure. The dual rotor and stator structure are fixed in the dual-rotor compound motor pump, as shown in FIG. Figure 1 shown.

[0052] Two end covers 1 are distributed on both sides, two distribution plates 11 are respectively connected to the inner sides of the two end covers 1, the outer shell 6 is connected between the two distribution plates 11, the inner sides of the two distribution plates 11 are connected to the cylinder body, the rotating shaft 3 is placed in the outer shell 6, each side of the rotating shaft 3 passes through the cylinder body and the distribution plate 11 from the inside to the outside, and the two ends of the distribution plates 11 on both sides are respectively connected to the two end covers 1 through the rotating shaft bearings 4; the inner rotor 18 is installed on the rotating shaft 3, the outer rotor 7 is sleeved on the outside of the inner rotor 18, the two sides of the outer rotor 7 are connected to the cylinder body and the outer shell 6, the driving structure is connected between the inner rotor 18 and the outer rotor 7, and is used to drive the inner rotor 18 and the outer rotor 7 to rotate; the outer side of the outer rotor 7 is connected to the outer shell 6 through the outer shell bearing 2, and the inner side is connected to the cylinder body through the stator bearing 5. The outer rotor 7 rotates through the bearing. Both sides of the inner rotor 18 and the outer rotor 7 have inclined surfaces. Multiple plungers 9 are connected to each cylinder body. The plungers 9 on both sides are connected to the inclined surfaces on both sides of the inner rotor 18 and the outer rotor 7. The side walls of the outer shell 6 are provided with first through holes as oil inlets, and the side walls of the outer rotor 7 are provided with second through holes communicating with the inside of the outer rotor 7. Both the first through holes and the second through holes communicate with the space between the outer shell 6 and the outer rotor 7. The outer wall of the distributor plate 11 is provided with an opening as an oil outlet. Both sides of the stator 8 are connected to the two cylinder bodies respectively. The inner and outer walls of the stator 8 are wound with windings 17. Multiple outer permanent magnets 16 are adsorbed on the inner wall of the outer rotor 7 along the circumferential direction, and multiple inner permanent magnets 19 are adsorbed on the outer wall of the inner rotor 18 along the circumferential direction. The assembly sequence is: assemble the motor part first, and assemble the shaft 3, the inner rotor 18, the inner permanent magnet 19, the stator 8, the winding 17, the outer rotor 7, and the outer permanent magnet 16 in sequence from the inside to the outside, and they are connected through bearings.

[0053] The motor pump of the present invention is mainly divided into a motor unit and a pump unit. The motor unit mainly includes: a stator (8), an inner rotor 18, and an outer rotor 7, and the pump unit mainly includes: a cylinder body, a plunger (9), a sliding shoe, and a distribution plate (11). In the motor unit, the inner and outer rotors of the motor and the permanent magnets adsorbed on the inner and outer rotors are italic. The reciprocating motion of the plunger 9 in the pump body is achieved by the rotation of the dual rotor structure, thereby achieving the oil suction and discharge of the pump.

[0054] The inner and outer rotors, the stator 8 and the permanent magnets in the motor unit are coaxial structures.

[0055] like Figure 2 The figure shows a two-dimensional cross-sectional view of the motor part of the dual-rotor compound motor pump, indicating the relative positions of the motor shaft 3, the inner rotor 18, the stator 8, and the outer rotor 7. Figure 7 Shown is a three-dimensional cross-sectional view of the outer rotor. Figure 8 Schematic diagram of the three-dimensional structure of the stator. Fig. 9 It is a two-dimensional cross-sectional view of the stator and a schematic diagram of the liquid flow direction.

[0056] The cylinder body includes an inner cylinder 14 and an outer cylinder 15. The inner cylinder 14 is arranged inside the outer cylinder 15. The inner cylinder 14 and the outer cylinder 15 are fixed together with the distribution plate 11 and do not rotate. The inner cylinder 14 and the outer cylinder 15 are both provided with a plurality of plunger holes distributed circumferentially. A plunger 9 is connected to each plunger hole (the plunger 9 is loosely assembled into the plunger hole of the cylinder body). The plunger 9 performs reciprocating linear motion in the plunger hole. The plunger 9 is an assembly body, and a first one-way valve 12 is arranged inside. The plunger 9 includes a plunger body 10. A channel is arranged inside the plunger body 10. A through hole connected to the channel is arranged at the head of the plunger body 10, and the first one-way valve 12 is arranged in the channel. The head of the plunger body 10 is connected to the inclined surfaces of the inner rotor 18 and the outer rotor 7 through sliding shoes. As shown Figure 5 Shown is a schematic diagram of the structure of the sliding shoe, plunger and cylinder body.

[0057] like Figure 3 Shown is a three-dimensional diagram of the coordination between the plunger 9, the cylinder body and the distribution plate 11, indicating the relative coordination relationship of the pump body unit of the twin-rotor motor pump. The number of plungers is odd (the purpose is to set the number of plungers to an odd number in order to reduce the pulsation of the instantaneous theoretical flow of the plunger pump).

[0058] The motor pump also includes a central compression spring 20 disposed in the plunger hole, and the central compression spring 20 is connected to the tail of the plunger 9. In a stationary state, the plunger 9 is installed in the plunger holes evenly distributed in the inner and outer cylinder bodies, and the head of the plunger 9 is installed with a sliding shoe. Due to the action of the central compression spring 20, the plunger 9 is always attached to the surface of the inner and outer rotors of the motor. The plunger 9 is in contact with the inner and outer rotors. The left and right surfaces of the inner and outer rotors of the motor are both inclined surfaces. When the inner and outer rotors of the motor rotate, the plunger 9 will perform reciprocating linear motion in the plunger hole (the plunger 9 performs linear reciprocating motion left and right, and does not rotate in a circle), thereby realizing the action of sucking and discharging oil. And the plunger 9 is reset under the action of the central compression spring 20.

[0059] The first one-way valve 12 installed inside the plunger 9 prevents oil from flowing back, and a central compression spring 20 ensures that the plunger 9 and the sliding shoe are attached to the oblique side surfaces of the outer rotor 7 and the inner rotor 18, and the central compression spring 20 is always in a compressed state. Similarly, a second one-way valve 13 is also installed at the matching position between the distribution plate 11 and the inner and outer plunger holes to prevent oil from flowing back.

[0060] The first one-way valve 12 includes a ball 91, a spring 92 and a screw cap 93. The screw cap 93 is connected to the tail of the channel. The two ends of the screw cap 93 are respectively connected to the ball 91 and the screw cap 93. The ball 91 is close to the head of the plunger body 10. The screw cap 93 has a through hole inside, which is connected to the channel and the plunger hole. The tail end of the screw cap 93 is connected to the head end of the central compression spring 20, and the tail end of the central compression spring 20 is connected to the inner wall of the plunger hole.

[0061] like Figure 4The figure shows a cross-sectional view of the plunger assembly, which can be seen to be composed of a plunger body 10, a small ball 91, a spring 92, and a screw cap 93. The small ball 91, the spring 92 and the screw cap 93 form a one-way channel, which only allows the oil to flow from left to right and does not allow the oil to flow back. The plunger body 10 has a hole for the oil to flow, connecting the oil inlet and the oil outlet.

[0062] The interior of the distribution disk 11 is provided with a first annular flow channel and a second annular flow channel along the circumferential direction, and a radial flow channel is provided along the direction parallel to the radial direction; the first annular flow channel and the second annular flow channel are both connected with the radial flow channel, and the radial flow channel is connected with the opening on the distribution disk 11; a plurality of third through holes and a plurality of fourth through holes are provided on the side of the distribution disk 11 close to the cylinder body, and the plurality of third through holes are distributed on the outer ring of the plurality of fourth through holes, the plurality of third through holes are connected with the first annular flow channel, and the plurality of fourth through holes are connected with the second annular flow channel; a second one-way valve 13 is provided in each of the third through hole and the fourth through hole.

[0063] The second one-way valve 13 includes a pressure plate, a ball, a spring and a screw, the screw is connected to the distribution plate 11, the two ends of the spring are respectively connected to the ball and the screw, and the ball is located between the pressure plate and the spring; a first groove is provided on the side of the third through hole close to the cylinder body, and a second groove is provided on the side of the fourth through hole close to the cylinder body. The pressure plate in the third through hole is placed in the first groove, and the pressure plate in the fourth through hole is placed in the second groove. A through hole is opened in the middle of the pressure plate, and the through hole is used to realize the connection between the plunger hole in the cylinder body and the third through hole and the fourth through hole.

[0064] In the present invention, in order to achieve accurate coordination between the movement of the plunger 9 and the switching of the oil suction circuit and the oil pressure circuit, a distribution plate 11 is placed between the distribution end surface of the cylinder body and the oil suction and oil pressure channels of the pump. The distribution plate 11 cooperates with the oil suction and oil discharge holes of the inner and outer cylinder bodies. The design of the distribution plate 11 ensures that the oil suction circuit and the oil pressure circuit can be accurately switched to the correct position at each stage of the movement of the plunger 9. When the plunger 9 moves forward, it can suck in liquid; and when the plunger 9 moves backward, it can discharge liquid.

[0065] When the motor part is started and the inner and outer rotors start to rotate, the design of the inclined surface causes the plunger 9 to produce reciprocating linear motion in the plunger hole. As the rotor rotates, the plunger 9 constantly changes its position under the action of the inclined surface, thereby completing the action of sucking and discharging oil in the cylinder body.

[0066] like Figure 6 Shown is the direction of oil flow.

[0067] The dual-rotor compound motor pump is filled with oil, and a sealing device is attached to the housing 6 to prevent leakage. The sealing device uses a sealing ring 21, wherein the sealing ring 21 is arranged between the left side of the housing 6 and the left distribution plate 11, and the sealing ring 21 is arranged between the right side of the housing 6 and the right distribution plate 11.

[0068] Working principle of the dual rotor part: Based on the interaction between electromagnetic induction and electromagnetic force, the inner and outer rotors are each equipped with a precision winding 17. When the external power supply is turned on, the current passes through the winding 17 to generate an electromagnetic field. According to the law of electromagnetic induction, when the magnetic field changes, an induced electromotive force will be generated in the conductor, thereby generating an induced current. In the dual rotor motor pump, this electromagnetic field not only causes the winding 17 itself to produce a magnetic effect, but also drives the inner and outer rotors to rotate relative to each other through the interaction between the magnetic fields (the inner and outer rotors rotate in the same direction).

[0069] Working principle of the pump part: In a stationary state, the plunger 9 is installed in the plunger holes evenly distributed in the cylinder body. The heads of these plungers 9 are equipped with sliding shoes, which reduce the friction between the plunger 9 and the inner and outer rotors, so that the plunger 9 can move more smoothly. Specifically, the sliding shoes are connected to the inner and outer rotors to reduce the friction between the plunger 9 and the inner and outer rotors, so that a wedge-shaped gap is formed between the sliding shoes and the inner and outer rotors, forming a stable oil film, reducing friction, and filling the gap. In order to maintain close contact between the plunger (9) and the inner and outer rotor surfaces of the motor, the system uses a central compression spring, which ensures that the plunger 9 can always be in close contact with the rotor surface when not affected by external forces, thereby ensuring the stability and sealing of the pump.

[0070] The present invention has the advantages of modularity, economy, practicality, stable and reliable operation, etc. The adopted motor dual rotor is not only suitable for the motor pump proposed in the present invention, but also suitable for other motor fields, such as the electric vehicle field.

[0071] The dual-rotor dual-swash plate pump device of the present invention has a compact structure and flexible control. The dual rotors are inclined, which can better increase the motor magnetic density and improve the overall power density. At the same time, radial expansion can be achieved to realize a multi-rotor topology structure, further increasing the pump displacement. Compared with general plunger pumps, the dual-swash plate structural design can effectively reduce pulsation and vibration, improve work efficiency and energy utilization, balance pressure, and increase the service life of the motor pump.

[0072] In the present invention, the inner and outer rotors of the dual rotor part cooperate with each other, both of which are equipped with precision windings 17, and interact with each other through the principle of electromagnetic induction, thereby driving the swash plate rotor to rotate. This dual rotor design not only significantly improves the power density of the motor, but also optimizes the energy utilization efficiency, so that it can still output powerful power in a compact size.

[0073] In the present invention, the compound pump part, the inner and outer rotors with inclined surfaces are connected to the plunger 9 through the sliding shoe. The plunger 9 reciprocates in the pump chamber under the drive of the swash plate rotor to achieve the function of sucking and discharging the fluid. A discharge port (oil discharge port) and a fluid channel corresponding to the plunger 9 are provided above the distribution plate 11. When the plunger 9 moves, the fluid channel on the distribution plate 11 will cooperate with the plunger 9 to achieve the suction and discharge of the fluid. The head side of the plunger 9 absorbs oil, passes through the first one-way valve 12, and discharges the oil into the flow channel in the distribution plate 11 through the tail side of the plunger 9, and is discharged from the oil discharge port of the distribution plate 11.

[0074] The double swash plate structure of the pump unit helps to distribute the pressure more evenly in the motor pump, which can produce better force balance and ensure a more uniform suction and discharge process, thus helping the fluid to produce a smoother and more uniform flow. In addition, the compound pump adopts a dual rotor structure, and the two rotors are designed to be symmetrical, so that when running, the suction and discharge processes of each rotor are synchronized and opposite. This symmetry can effectively reduce pulsation and vibration, improve work efficiency, reduce energy consumption, and extend the service life of the motor pump.

[0075] Both the dual rotor and compound pump can increase the redundancy of the motor pump. Under normal circumstances, the two rotors can work simultaneously to provide greater output power. However, if one of the rotors fails, the other rotor can still operate independently to ensure that the system will not fail completely. The left and right swash plate rotors and the distribution plate 11 of the compound pump part form multiple independent fluid channels. If one channel is blocked or leaking, the other channels can still operate normally.

[0076] The control of the dual-rotor motor part can be carried out through an external driver, and the speed of the dual-rotor motor part is controlled by controlling the current of the coil (winding 17). When the compound pump drives the swash plate rotor to rotate through the motor part, the plunger 9 makes axial reciprocating motion along the pump cylinder. When the plunger 9 moves forward (intake stroke), the volume in the pump cylinder increases, forming a low-pressure area, attracting liquid into the pump; when the plunger 9 moves backward (discharge stroke), the volume in the pump cylinder decreases, the liquid is compressed and discharged at high pressure.

[0077] The inclination angle of the swash plate rotor in the composite pump part of the present invention can be adjusted according to the pumping demand to change the stroke of the plunger and the output flow of the pump. The swash plate rotor can increase the magnetic flux density of the motor to a certain extent and improve the power density of the motor unit.

[0078] The motor pump motor of the present invention adopts a dual-rotor structure, and a magnetic stator is arranged in the middle. This design allows the two rotors to not interfere with each other during operation, thereby improving the stability and efficiency of the motor. Furthermore, based on the principle of magnetic conductivity of the stator in the middle of the dual rotor, it can be further expanded to a radial topological structure. In this structure, a multi-rotor, multi-stator and multi-cylinder configuration can be achieved, which improves the working efficiency and stability of the pump and provides a more efficient and stable fluid transmission solution for various other application scenarios.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-rotor compound motor pump, characterized in that: include: Two end covers (1), a rotating shaft (3), two distribution plates (11), a housing (6), an outer rotor (7) arranged in the housing (6), a driving structure, a plunger (9), a cylinder body and an inner rotor (18), wherein the two end covers (1) are distributed on both sides, the two distribution plates (11) are respectively connected to the inner sides of the two end covers (1), the housing (6) is connected between the two distribution plates (11), the inner sides of the two distribution plates (11) are both connected to the cylinder body, the rotating shaft (3) is placed in the housing (6), each side of the rotating shaft (3) passes through the cylinder body and the distribution plate (11) from the inside to the outside in sequence, and the two ends of the two sides passing through the distribution plate (11) are respectively rotatably connected to the two end covers (1); The inner rotor (18) is connected to the rotating shaft (3), the outer rotor (7) is sleeved on the outside of the inner rotor (18), the two sides of the outer rotor (7) are rotatably connected between the cylinder body and the outer shell (6), and the driving structure is connected between the inner rotor (18) and the outer rotor (7) to drive the inner rotor (18) and the outer rotor (7) to rotate; both sides of the inner rotor (18) and the outer rotor (7) have inclined surfaces, and each cylinder body is connected to a plurality of plungers (9), and the plungers (9) on both sides are connected to the inclined surfaces on both sides of the inner rotor (18) and the outer rotor (7); The side walls of the outer shell (6) are provided with first through holes serving as oil inlets, and the side walls of the outer rotor (7) are provided with second through holes communicating with the interior of the outer rotor (7), and both the first through holes and the second through holes are communicated with the space between the outer shell (6) and the outer rotor (7); and the outer wall of the distribution plate (11) is provided with an opening serving as an oil discharge port.

2. The dual-rotor compound motor pump according to claim 1, characterized in that: The driving structure comprises a plurality of external permanent magnets (16), a winding (17), a stator (8) and a plurality of internal permanent magnets (19); the two sides of the stator (8) are respectively connected to two cylinder bodies; the inner and outer walls of the stator (8) are both wound with windings (17); the plurality of external permanent magnets (16) are circumferentially adsorbed on the inner wall of the outer rotor (7); and the plurality of internal permanent magnets (19) are circumferentially adsorbed on the outer wall of the inner rotor (18).

3. The dual-rotor compound motor pump according to claim 1, characterized in that: The cylinder body comprises an inner cylinder (14) and an outer cylinder (15), wherein the inner cylinder (14) is arranged inside the outer cylinder (15), and the inner cylinder (14) and the outer cylinder (15) are both provided with a plurality of plunger holes distributed circumferentially, each plunger hole is connected to a plunger (9), and the plunger (9) performs reciprocating linear motion in the plunger hole.

4. The dual-rotor compound motor pump according to claim 3, characterized in that: A central compression spring (20) is also provided in the plunger hole. The central compression spring (20) is connected to the tail of the plunger (9). The central compression spring (20) ensures that the plunger (9) always closely adheres to the surfaces of the inner rotor (18) and the outer rotor (7) when no external force is applied.

5. The dual-rotor compound motor pump according to claim 1, characterized in that: The plunger (9) comprises a plunger body (10), a channel is provided inside the plunger body (10), a through hole communicating with the channel is provided at the head of the plunger body (10), and a first one-way valve (12) is provided in the channel.

6. The dual-rotor compound motor pump according to claim 5, characterized in that: The head of the plunger body (10) is connected to the inclined surfaces of the inner rotor (18) and the outer rotor (7) through sliding shoes.

7. The dual-rotor compound motor pump according to claim 5, characterized in that: The first one-way valve (12) comprises a small ball (91), a spring (92) and a screw cover (93). The screw cover (93) is connected to the tail end of the channel. The two ends of the screw cover (93) are respectively connected to the small ball (91) and the screw cover (93). The small ball (91) is close to the head of the plunger body (10). The interior of the screw cover (93) has a through hole, which is connected to the channel and the plunger hole.

8. The dual-rotor compound motor pump according to claim 1, characterized in that: The interior of the distribution plate (11) is provided with a first annular flow channel and a second annular flow channel along the circumferential direction, and a radial flow channel is provided along a direction parallel to the radial direction; the first annular flow channel and the second annular flow channel are both connected to the radial flow channel, and the radial flow channel is connected to an opening on the distribution plate (11); A plurality of third through holes and a plurality of fourth through holes are provided on one side of the distribution plate (11) close to the cylinder body and are circumferentially distributed, the plurality of third through holes are distributed on the outer ring of the plurality of fourth through holes, the plurality of third through holes are connected to the first annular flow channel, and the plurality of fourth through holes are connected to the second annular flow channel; A second one-way valve (13) is provided in each of the third through hole and the fourth through hole.

9. The dual-rotor compound motor pump according to claim 8, characterized in that: The second one-way valve (13) comprises a pressure plate, a ball, a spring and a screw, wherein the screw is connected to the distribution plate (11), the two ends of the spring are respectively connected to the ball and the screw, and the ball is located between the pressure plate and the spring; A first groove is provided on the side of the third through hole close to the cylinder body, and a second groove is provided on the side of the fourth through hole close to the cylinder body. The pressure plate in the third through hole is placed in the first groove, and the pressure plate in the fourth through hole is placed in the second groove. A through hole is opened in the middle of the pressure plate, and the through hole is used to realize the connection between the plunger hole in the cylinder body and the third through hole and the fourth through hole.

10. The dual-rotor compound motor pump according to claim 1, characterized in that: The rotating shaft (3) is connected to the end cover (1) via a rotating shaft bearing (4); the outer side of the outer rotor (7) is connected to the outer shell (6) via an outer shell bearing (2), and the inner side is connected to the cylinder body via a stator bearing (5); Sealing devices are provided between the two sides of the housing (6) and the two distribution plates (11).

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