Linear power-driven bidirectional plunger pump

Abstract

The utility model discloses a linear power-driven bidirectional plunger pump, which mainly comprises a shell, a stator component and a rotor component which are positioned in the shell, a fluid inlet and a fluid outlet which are positioned at two ends of the shell, and a hollow shaft fixed in the shell, wherein a fluid exchange component is fixed on the outer side of the hollow shaft; the two plunger driving mechanisms are located on the two sides of the fluid exchange assembly correspondingly, the rotor assembly and the hollow shaft are coaxially and concentrically arranged in a sliding mode, and the rotor assembly is driven by electromagnetic force to do reciprocating rectilinear motion along the central axis of the hollow shaft. Therefore, the two sets of plunger driving mechanisms are driven to be matched with the radial holes in the center shaft to alternately input and output and are matched with the fluid exchange assembly to achieve input of fluid from the fluid inlet and output of fluid from the fluid outlet. The function of a bidirectional reciprocating pump is achieved in the rotor assembly, the input and output efficiency and quantity are improved, and the stability and stress balance of the whole machine are synchronously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid pump technical field, concretely relates to a linear power driven axial bidirectional plunger pump. BACKGROUND

[0002] The plunger pump can be divided into axial plunger structure and radial plunger structure according to the arrangement of plunger. The axial plunger pump works by the volume change generated by the parallel reciprocating motion of plunger in the cylinder hole of cylinder. When working, the driving spindle drives the cylinder to rotate, and in the process of rotating a circle, the plunger sliding in the cylinder hole makes a reciprocating motion under the action of swash plate, realizing the suction and discharge of liquid. The plunger pump is widely used in high pressure, large flow and flow adjustment occasions, such as hydraulic machine, engineering machinery and ship.

[0003] The structure of plunger pump is very common at present, for example, the tool book "plunger pump technology manual", "principle, design and application of plunger pump" introduce the structure, working principle, design, manufacturing and other aspects of plunger pump in detail. However, the power source of the existing plunger pump generally adopts external motor or engine. The motor is the most common method to drive the plunger pump, the motor provides stable and controllable power source, which is suitable for scenes requiring stable power output; the plunger pump can also be used with gasoline or diesel engine, etc. Internal combustion engine, for mobile or remote applications that may not have access to electricity. However, in this way, the power source and the plunger pump are two independent units, which increases the space, volume, weight and cost, causing waste.

[0004] As shown in Chinese patent CN112963325A, the applicant proposes a one-way pump combined with a linear motor, which comprises a shell, a fluid outlet and a fluid inlet, a stator assembly and a mover assembly are arranged in the shell; the mover assembly penetrates through the stator assembly and reciprocates along the axial direction thereof; the two ends of the mover assembly are columnar plugs, which are limited by the inner wall of the limiting cavity and move linearly and reciprocally in the limiting cavity. This structure forms two cavities in the shell, utilizes the linear reciprocating motion characteristics of the linear motor, makes the mover assembly do piston motion in the shell, continuously forms pressure difference to input and output fluid, and realizes the function of one-way plunger reciprocating pump. However, for the liquid pump with large flow and balanced forward and reverse work, the efficiency of one-way plunger reciprocating pump is relatively low. SUMMARY

[0005] The utility model aims at overcoming the shortcomings of prior art, provides a linear power driven bidirectional plunger pump, solves the problems of small size, high efficiency of existing bidirectional plunger pump without increasing additional pump body, so as to realize the goals of small size, low weight, low cost, high efficiency and stable and balanced stress.

[0006] The utility model discloses a purpose is realized through the following technical schemes:

[0007] A linear power drive bidirectional plunger pump, including the casing, fluid import and fluid export, the casing is fixed with stator subassembly and the mover subassembly of moving relative to stator subassembly in, the hollow shaft is fixed in the casing and is passed, the both ends of hollow shaft are equipped with fluid export and fluid import respectively, the inside of hollow shaft has an isolator for adjusting liquid flow direction, the casing still is equipped with a cylinder body with the synchronous movement of mover subassembly, the cylinder body is equipped with two sets of plunger drive mechanism, and reciprocating motion is carried out on the hollow shaft of sleeve joint, the outside of hollow shaft is fixed with a fluid exchange subassembly, the fluid exchange subassembly is located in the cylinder body and its outer wall and the cylinder body inner wall sliding seal cooperation, two sets of plunger drive mechanism are located at the both sides of fluid exchange subassembly respectively, the mover subassembly reciprocating linear motion along the central axis of hollow shaft under the action of electromagnetic force, thereby drive two sets of plunger drive mechanism alternate input and output, and cooperate with fluid exchange subassembly to realize fluid from fluid import input and export from fluid export.

[0008] Preferably, the fluid exchange assembly has a cylindrical body, the internal space accommodates the hollow shaft to cooperate with the sealing and fixing, the two end faces of the cylindrical body are respectively provided with a liquid inlet hole and a liquid outlet hole, the liquid inlet hole is communicated with the liquid inlet ring groove, the liquid outlet hole is communicated with the liquid outlet ring groove, the liquid outlet ring groove and the liquid inlet ring groove are mutually parallel ring grooves in the body, and are mutually sealed and isolated.

[0009] Preferably, the isolator is a rubber part, and is fixed in the middle position of the inside of the hollow shaft in interference fit, the first radial hole and the second radial hole are respectively provided on the two sides of the isolator and are passed through the pipe wall of the hollow shaft, the first radial hole is always communicated with the liquid inlet ring groove, and the second radial hole is always communicated with the liquid outlet ring groove.

[0010] Preferably, the first set of plunger drive mechanisms on the right side includes a first locking member fixed on the outer wall of the hollow shaft and a first inner diameter shunt one-way valve and a first outer diameter shunt one-way valve located on both sides thereof, and a first gap is formed between the outer periphery of the first locking member and the inner wall of the cylinder body.

[0011] Preferably, the first inner diameter shunt one-way valve is a circular ring structure, the outer wall of which is in sliding seal cooperation with the inner wall of the cylinder body, the inner side of which has a guide ring, the first end of the first spring is abutted on the guide ring, and the second end is abutted on the end face of the fluid exchange assembly, and the first inner diameter shunt one-way valve and the outer wall of the hollow shaft form a first channel.

[0012] Preferably, the first outer diameter shunt check valve is a hollow frustum structure, including a large diameter section and a small diameter section, the outer diameter of the large diameter section is smaller than the inner diameter of the cylinder so as to have a second gap therebetween, the small diameter section is sleeved with a second spring, the first end of the second spring abuts on the end face of the large diameter section, and the second end abuts on the first locking member.

[0013] Preferably, the left side of the second sleeve includes a second locking member fixed on the inner wall of the cylinder and a second inner diameter shunt check valve and a second outer diameter shunt check valve located on both sides thereof, the inner ring surface of the second locking member is in sliding sealing cooperation with the hollow shaft, the shape of the second inner diameter shunt check valve is the same as that of the first inner diameter shunt check valve, and the shape of the second outer diameter shunt check valve is the same as that of the first outer diameter shunt check valve.

[0014] Preferably, the cylinder is fixed with an oil seal type sealing member at each end, each oil seal type sealing member is fixed to the cylinder by a fixing member, and the inner wall of the oil seal type sealing member is in sliding sealing cooperation with the outer periphery of the hollow shaft.

[0015] Preferably, a third spring is arranged between the second inner diameter shunt check valve and the second locking member, a third channel is formed between the second inner diameter shunt check valve and the outer wall of the hollow shaft, the maximum outer diameter of the second outer diameter shunt check valve is smaller than the inner diameter of the cylinder so as to have a third gap therebetween, a fourth spring is sleeved on the second outer diameter shunt check valve, the first end of the fourth spring abuts on the end face of the large diameter section of the second outer diameter shunt check valve, and the second end directly or indirectly abuts on the end face of the oil seal type sealing member.

[0016] Preferably, the hollow shaft is further provided with a third radial hole and a fourth radial hole penetrating the pipe wall of the hollow shaft, when the cylinder and the mover assembly move synchronously, the third radial hole is in communication with the second gap, and the fourth radial hole is in communication with the third gap.

[0017] The utility model discloses still disclose a kind of linear power-driven bidirectional plunger pump, including shell, fluid inlet and fluid outlet, fixedly arranged with stator assembly in the shell and the mover assembly moving relative to the stator assembly, one hollow shaft is fixedly passed in the shell, the fluid outlet and fluid inlet are respectively equipped in the both ends of the hollow shaft;The inside of the hollow shaft has a spacer for adjusting liquid flow direction;The cylinder body that the mover assembly synchronously moves is also provided in the shell, two sets of plunger driving mechanisms are provided in the cylinder body, and reciprocating motion is carried out on the hollow shaft by sleeve connection;Fluid exchange component is fixed in the cylinder body, the inner wall of the fluid exchange component and the outer wall of the hollow shaft sliding seal cooperation, the two sets of plunger driving mechanisms are respectively located at the both sides of the fluid exchange component, the mover assembly reciprocating linear motion along the central axis of the hollow shaft under the action of electromagnetic force, to drive the two sets of plunger driving mechanisms alternate input and output, and the fluid exchange component is cooperated to realize that fluid is input from fluid inlet, and output from fluid outlet.

[0018] The utility model discloses the beneficial effect mainly reflects in:

[0019] (1) set up two sets of plunger driving mechanisms in the mover, under the premise of hardly increasing the volume of linear power motor, realize the effect that linear motor and plunger pump are perfectly combined, and the volume of complete machine is reduced at least 15%, and power output is stable and symmetrical, and the effect that relative unidirectional plunger pump efficiency is improved 15%-50% and flow is increased 50%-100% is realized.

[0020] (2) the parts of two sets of plunger driving mechanisms are almost same, and cost is reduced;

[0021] (3) compared with existing plunger pump, the driving source of external equipment is pushed to rotate inclined plane, and then plunger rod is driven, and the utility model adopts the structure of concentric design of all parts, and is convenient to assemble, and will not be easily jammed due to angle change. DRAWINGS

[0022] The utility model technical scheme is further explained in combination with the drawings:

[0023] Figure 1 The utility model preferred embodiment is the sectional view at first limit position;

[0024] Figure 2 The utility model preferred embodiment is the sectional view at second limit position;

[0025] Figure 3 The structure diagram of the fluid exchange component of the utility model is shown in the figure;

[0026] Figure 4 The sectional view of the fluid exchange component of the utility model is shown in the figure;

[0027] Figure 5 : Figure 1 enlarged view of part A in the middle;

[0028] Figure 6 : Figure 1 enlarged view of part B in the middle;

[0029] Figure 7 : the structure diagram of the first inner diameter shunt one-way valve of the utility model;

[0030] Figure 8 : the sectional view of the first inner diameter shunt one-way valve of the utility model;

[0031] Figure 9 : the structure diagram of the first outer diameter shunt one-way valve of the utility model;

[0032] Figure 10 : the sectional view of the first outer diameter shunt one-way valve of the utility model;

[0033] Figure 11 : Figure 2 enlarged view of part C in the middle;

[0034] Figure 12 : the sectional view of the second embodiment of the utility model at the first limit position;

[0035] Figure 13 : the sectional view of the second embodiment of the utility model at the second limit position. DETAILED DESCRIPTION

[0036] The utility model will be described in detail below in combination with the specific embodiments shown in the drawings. But these embodiments are not limited to the utility model, and the structural, method or functional changes made by the ordinary skilled in the art based on these embodiments are all included in the protection scope of the utility model.

[0037] In the description of the scheme, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. And in the description of the scheme, the operator is taken as the reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0038] In combination withFigures 1 to 11 As shown, this utility model discloses a linear power driven bidirectional plunger pump, which has a structure that integrates with a linear motor to form a self-contained drive source. It includes a housing 1, and fluid inlet 100 and fluid outlet 200 disposed at both ends of the housing 1. The fluid can be water, oil, or other liquids or gases to be pumped.

[0039] The housing 1 is fixedly provided with a stator assembly 2 and a mover assembly 3 that moves relative to the stator assembly 2. Of course, as is well known to those skilled in the art, the structures of the stator assembly 2 and the mover assembly 3 can be varied and are not limited to those shown in the figure. Their function is simply that when the stator assembly 2 is energized, it generates an electromagnetic force to drive the mover assembly 3 to produce a reciprocating linear motion along its axis.

[0040] A hollow shaft 10 is fixedly fixed inside the housing 1. The two ends of the hollow shaft 10 are the fluid inlet 100 and the fluid outlet 200, respectively. The fluid inlet 100 and fluid outlet 200 can be located on the housing 1 and directly communicate with the hollow shaft 10, or they can be the two ends of the hollow shaft 10 itself, or the two ends of the hollow shaft 10 can be connected to other sealed inlets / outlets. The housing 1 of this invention adopts a splicing assembly structure. The two ends of the hollow shaft 10 are respectively fixed inside the housing 1, and a sealing ring 101 is provided between them for sealing.

[0041] Specifically, such as Figure 5 As shown, the hollow shaft 10 has an isolation member 102 inside for adjusting the liquid flow direction; the isolation member 102 is a rubber part, which is fixed to the middle position inside the hollow shaft 10 with an interference fit, and a first radial hole 104 and a second radial hole 105 penetrating the tube wall of the hollow shaft 10 are respectively provided on both sides near the isolation member 102.

[0042] The housing also contains a cylinder 4 that moves synchronously with the moving part assembly 3. The moving part assembly 3 is a hollow body, and the cylinder 4 is fixedly disposed inside it. An insulator 5 is also disposed between the two to insulate the cylinder 4 from the moving part assembly 3.

[0043] The cylinder 4 contains two sets of plunger drive mechanisms, which are connected to the hollow shaft 10 for reciprocating motion. The specific structure will be detailed later. Figure 6As shown in the drawings, in order to improve the product precision, the both ends of the cylinder body 4 are fixed with sliding support members 41, the sliding support members 41 are internally provided with hollow passages 411, the sliding support members 41 are sleeved on the outer periphery of the hollow shaft 10, and the axial outer side of each sliding support member 41 is provided with an oil seal type sealing member 42, preferably a double-ear oil seal. The cylinder body 4, the sliding support members 41 and the oil seal type sealing members 42 are fixedly integrated by a fixing member 43. The utility model optimizes the sliding support members 41 at both ends, internally provides the hollow passages 411 and grooves for corresponding the position of the hollow shaft, reduces the axial dimension, and reduces the friction loss of the hollow shaft and the sliding body. Of course, in individual embodiments, the sliding support members 41 can be part of the cylinder body or the hollow shaft itself. The utility model can also be provided with elastic bodies at the both ends of the mover and the position of the shell to prevent extreme impact.

[0044] In combination Figure 6 And Figure 11 As shown in the drawings, the hollow shaft 10 is further provided with a third radial hole 106 and a fourth radial hole 107 penetrating the pipe wall of the hollow shaft 10; the third radial hole 106 is always in communication with the second gap 92, and the fourth radial hole 107 is always in communication with the third gap 93. In the preferred embodiment, when the cylinder body 4 moves synchronously with the mover assembly 3, the third radial hole 106 and the fourth radial hole 107 are alternately in communication with the hollow passages 411 of the sliding support members 41, respectively.

[0045] In the utility model, the four groups of radial holes on the hollow shaft 10 have at least one hole in each group. Preferably, two or three local radial circles are uniformly distributed. Further preferably, three rows of holes are arranged in a staggered manner on each group of circles, i.e. staggered by 120 degrees or 180 degrees, etc. on each group of circles, further reducing the strength and rigidity loss of the hollow shaft. Further preferably, the size of the holes is 25%-50% of the size of the holes of the hollow shaft, and the size is determined according to the number. In principle, the area of the holes is not less than the area of the holes of the hollow shaft.

[0046] The outer side of the hollow shaft 10 is fixed with a fluid exchange assembly 103 by means of pins, threads or mechanical hardness, welding and the like. The fluid exchange assembly 103 is located in the cylinder body 4 and the outer wall thereof is in sliding sealing cooperation with the inner wall of the cylinder body 4, and the two sets of plunger driving mechanisms are located on the two sides of the fluid exchange assembly 103. The fluid exchange assembly 103 can be one part or a combination of a plurality of parts. For example, several parts are welded and processed, or 3D printing is used, or a combination of castings and machining is used.

[0047] In combination Figures 1 to 4As shown, the fluid exchange assembly 103 has a cylindrical body 1031, the inner space of which accommodates the hollow shaft 10 to be fixedly fitted through the sealing, and the two end faces of the cylindrical body 1031 are respectively provided with a liquid inlet hole 1032 and a liquid outlet hole 1033, the liquid inlet hole 1032 is in communication with a liquid outlet annular groove 1034, the liquid outlet hole 1033 is in communication with a liquid inlet annular groove 1035, the liquid outlet annular groove 1034 and the liquid inlet annular groove 1035 are mutually parallel annular grooves in the interior of the body 1031, and are mutually sealed and isolated. The liquid outlet annular groove 1034 and the liquid inlet annular groove 1035 are each sealed and isolated with respect to the outer diameter of the hollow shaft. Fluid can selectively flow in from the liquid inlet annular groove 1035 or the liquid inlet hole 1032, and then flow out from the liquid outlet hole 1033 or the liquid outlet annular groove 1034. In the preferred embodiment, the first radial hole 104 of the hollow shaft 10 is always in communication with the liquid inlet annular groove 1035, and the second radial hole 105 is always in communication with the liquid outlet annular groove 1034.

[0048] In the preferred embodiment, two sets of plunger driving mechanisms are arranged in the cylinder body 4, one set is arranged on the right side, and the other set is arranged on the left side. Figure 1 The right side in the figure shows the first set of plunger driving mechanisms, and the left side shows the second set of plunger driving mechanisms.

[0049] The first set of plunger driving mechanisms includes a first locking member 61 fixed on the outer wall of the hollow shaft 10 and first inner diameter shunt one-way valves 71 and first outer diameter shunt one-way valves 81 located on both sides thereof. The second set of plunger driving mechanisms includes a second locking member 62 fixed on the inner wall of the cylinder body 4 and second inner diameter shunt one-way valves 72 and second outer diameter shunt one-way valves 85 located on both sides thereof.

[0050] The first locking member 61 has a first gap 91 between the outer periphery thereof and the inner wall of the cylinder body 4.

[0051] The inner ring surface of the second locking member 62 is in sliding sealing fit with the hollow shaft 10.

[0052] The first locking member 61 and the second locking member 62 of the utility model can be single parts or assemblies, and include locking rings, locking fasteners, sealing members, etc.

[0053] Specifically combined Figure 7 and Figure 8As shown, the first inner diameter diversion check valve 71 is an annular structure, with its outer wall slidingly sealing against the inner wall of the cylinder 4. It has a guide ring 70 on its inner side for attaching a spring. The second inner diameter diversion check valve 72 has the same shape as the first inner diameter diversion check valve 71. The first end of the first spring 21 abuts against the guide ring 70, and the second end abuts against the end face of the fluid exchange assembly 103. A first channel 710 is formed between the first inner diameter diversion check valve 71 and the outer wall of the hollow shaft 10. A third spring 23 is provided between the second inner diameter diversion check valve 72 and the second locking member 62, forming a third channel 720 between the second inner diameter diversion check valve 72 and the outer wall of the hollow shaft 10.

[0054] Specific combination Figure 9 and Figure 10 As shown, the first outer diameter diversion check valve 81 is a hollow frustum-shaped structure, including a large-diameter section 82 and a small-diameter section 83. The outer diameter of the large-diameter section 82 is smaller than the inner diameter of the cylinder 4, such that there is a second gap 92 between them. A spring is fitted onto the small-diameter section 83. The second outer diameter diversion check valve 85 has the same shape as the first outer diameter diversion check valve 81. The first end of the second spring 22 abuts against the end face of the large-diameter section 82 of the first outer diameter diversion check valve 81, and the second end abuts against the first locking member 61.

[0055] The maximum outer diameter of the second outer diameter diverter check valve 85 is smaller than the inner diameter of the cylinder 4, such that there is a third gap 93 between them. A fourth spring 24 is fitted on the second outer diameter diverter check valve 85. The first end of the fourth spring 24 abuts against the end face of the large diameter section of the second outer diameter diverter check valve 85, and the second end abuts against the end face of the cylinder 4. Figure 1 On the end face of the sliding support 41 on the left. Of course, when the sliding support 41 is not used in the plunger pump, the second end of the fourth spring 24 abuts against the end face of the oil seal type seal 42.

[0056] Combination Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 11 As shown, in this preferred embodiment, the moving part 3 reciprocates linearly along the central axis of the hollow shaft 10 under the action of electromagnetic force, driving the cylinder 4 to move synchronously.

[0057] When the cylinder is in Figure 1 At the first extreme position shown, the moving part assembly 3 and the cylinder 4 will move simultaneously to the left. See details... Figure 5 and Figure 6As shown, liquid enters from fluid inlet 100 and enters the interior of the hollow shaft 10; due to the presence of the partition 102, this stream of liquid will enter the liquid ring groove 1035 of the fluid exchange assembly 103 through the first radial hole 104, and then flow out from the liquid outlet hole 1033 into the second pump cavity P2; at the same time, due to the presence of the second spring 22, the first outer diameter shunt one-way valve 81 and the second locking member 62 are in close contact, causing the passage of the second locking member 62 to be blocked, so that the liquid will be stored in the second pump cavity P2 as the volume of the second pump cavity P2 increases.

[0058] At the same time, the liquid in the first pump cavity P1 is compressed by the first outer diameter shunt one-way valve 81, and then enters the fluid exchange assembly 103 from the liquid inlet hole 1032, and then enters the interior of the hollow shaft 10 through the liquid outlet ring groove 1034 and the second radial hole 105; due to the presence of the partition 102, this stream of liquid will flow out from the fluid outlet 200.

[0059] When the cylinder moves from the first limit position shown in Figure 1 to the second limit position shown in Figure 2 , the liquid in the first pump cavity P1 continues to flow out under the compression of the first outer diameter shunt one-way valve 81, while the distance between the second locking member 62 and the second inner diameter shunt one-way valve 72 gradually increases, causing the volume of the second pump cavity P2 to continuously increase, and thus the second pump cavity P2 will store more and more liquid.

[0060] When the cylinder moves to the second limit position shown in Figure 2 , the mover assembly 3 and the cylinder 4 will move to the right at the same time. Referring to Figure 2 and Figure 11 , the liquid in the second pump cavity P2 is compressed by the second locking member 62 facing the second inner diameter shunt one-way valve 72, and then passes through the through hole of the second locking member 62, the third gap 93 of the second outer diameter shunt one-way valve 85, and then enters the interior of the hollow shaft 10 through the fourth radial hole 107; due to the presence of the partition 102, this stream of liquid will flow out from the fluid outlet 200.

[0061] At this time, due to the action of the third spring 23, the end surface of the second inner diameter shunt one-way valve 72 will be in close contact with the fluid exchange assembly 103, so that the liquid will not flow out from the liquid outlet hole 1033.

[0062] At the same time, liquid enters from the fluid inlet 100 and enters the interior of the hollow shaft 10; due to the presence of the partition 102, the liquid enters the hollow channel 411 inside the sliding support 41 through the third radial hole 106, and then enters the first pump cavity P1 through the second gap 92. Since the first channel 710 of the first inner diameter split check valve 71 is sealed by the first locking member 61, the liquid is stored in the first pump cavity P1 as the volume of the first pump cavity P1 increases.

[0063] The two sets of plunger driving mechanisms alternately input and output, and cooperate with the fluid exchange assembly 103 to realize the input of fluid from the fluid inlet 100 and the output of fluid from the fluid outlet 200.

[0064] Figure 12 And 13 A second embodiment of the utility model is disclosed. The difference from the first embodiment is that a fluid exchange assembly 103 is fixed inside the cylinder body 4, the fluid exchange assembly 103 moves simultaneously with the passive subassembly 3 of the cylinder body 4, and the inner wall of the fluid exchange assembly 103 is in sliding sealing cooperation with the outer wall of the hollow shaft 10.

[0065] Similarly, the embodiment includes two sets of plunger driving mechanisms.

[0066] The first set of plunger driving mechanisms on the right side includes a second locking member 62 fixed on the inner wall of the cylinder body 4 and inner diameter split check valves 7 located on both sides of the second locking member 62, and the inner ring surface of the second locking member 62 is in sliding sealing cooperation with the hollow shaft 10; the third locking member 63 is fixed on the outer wall of the hollow shaft 10, and one of the inner diameter split check valves 7 is located between the third locking member 63 and the second locking member 62. The second set of plunger driving mechanisms on the left side includes a first locking member 61 fixed on the outer wall of the hollow shaft 10 and inner diameter split check valves 7 located on both sides of the first locking member 61, and the first gap 91 is formed between the outer periphery of the first locking member 61 and the inner wall of the cylinder body 4.

[0067] The two sets of plunger driving mechanisms alternately input and output, the first pump cavity P1 and the second pump cavity P2 are respectively in the liquid output and liquid input two interactive states, and cooperate with the fluid exchange assembly 103 to realize the input of fluid from the fluid inlet 100 and the output of fluid from the fluid outlet 200. For details, refer to the liquid flow direction (arrow) of Figure 12 、 13 , which will not be repeated here.

[0068] As is well known to those skilled in the art, the one-way valves in the first and second embodiments, such as the inner diameter split one-way valve, refer to the outer periphery thereof being sealed to the cylinder body, and fluid flowing out from the bore or the group of holes in the end face, not only from the inner diameter bore, and fluid passage is preferably formed from the inner diameter bore from the viewpoint of manufacturing process. Similarly, the outer diameter split one-way valve refers to the inner bore face thereof being sealed to the hollow shaft, and fluid flowing out from the outer diameter side or the group of holes in the end face.

[0069] The utility model can be applied to the linear motion tool industry, such as hardware electrical industry, landscaping industry, agriculture and household, etc., and be applied to fluid pump product, such as cleaning machine, water pump, inflator pump, water gun, etc.

[0070] It should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.

[0071] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the utility model, and they are not used to limit the protection scope of the utility model, and equivalent embodiments or changes made without departing from the spirit of the utility model art should be included in the protection scope of the utility model.

Claims

1. A linear power-driven bidirectional plunger pump, comprising a housing (1), a fluid inlet (100) and a fluid outlet (200), a stator assembly (2) and a mover assembly (3) moving relative to the stator assembly (2) are fixedly arranged in the housing (1), characterized in that: The hollow shaft (10) is fixed in the shell (1), and the fluid inlet (100) and the fluid outlet (200) are arranged at two ends of the hollow shaft (10) respectively; the inside of the hollow shaft (10) is provided with a partition (102) for adjusting the liquid flow direction; the shell is further provided with a cylinder (4) which moves synchronously with the mover assembly (3), the cylinder (4) is provided with two sets of plunger driving mechanisms, and is sleeved on the hollow shaft (10) to perform reciprocating motion; the outer side of the hollow shaft (10) is fixed with a fluid exchange assembly (103), the fluid exchange assembly (103) is located in the cylinder (4) and the outer wall thereof is in sliding sealing cooperation with the inner wall of the cylinder (4), the two sets of plunger driving mechanisms are located on the two sides of the fluid exchange assembly (103) respectively, and the mover assembly (3) performs linear reciprocating motion along the central axis of the hollow shaft (10) under the action of electromagnetic force, so as to drive the two sets of plunger driving mechanisms to alternately input and output, and cooperate with the fluid exchange assembly (103) to realize the input of fluid from the fluid inlet (100) and the output of fluid from the fluid outlet (200).

2. The linear power driven bi-directional plunger pump of claim 1, wherein: The fluid exchange assembly (103) has a cylindrical body (1031), the inside space of the cylindrical body (1031) accommodates the hollow shaft (10) in cooperation with the sealing fixing, the two end faces of the cylindrical body (1031) are respectively provided with a liquid inlet hole (1032) and a liquid outlet hole (1033), the liquid inlet hole (1032) is in communication with a liquid inlet ring groove (1035), the liquid outlet hole (1033) is in communication with a liquid outlet ring groove (1034), and the liquid outlet ring groove (1034) and the liquid inlet ring groove (1035) are mutually parallel ring grooves in the inside of the body (1031) and are mutually sealed and isolated.

3. The linear power driven bi-directional plunger pump of claim 2, wherein: The partition (102) is a rubber part and is fixed in an inside middle position of the hollow shaft (10) in an interference fit, first and second radial holes (104) and (105) are arranged in the pipe wall of the hollow shaft (10) near the two sides of the partition (102) respectively, the first radial hole (104) is always in communication with the liquid inlet ring groove (1035), and the second radial hole (105) is always in communication with the liquid outlet ring groove (1034).

4. The linear power driven bi-directional plunger pump of claim 3, wherein: The first set of plunger driving mechanisms on the right side includes a first locking part (61) fixed on the outer wall of the hollow shaft (10) and first inner diameter shunt one-way valves (71) and first outer diameter shunt one-way valves (81) located on the two sides of the first locking part (61), and a first gap (91) is formed between the outer periphery of the first locking part (61) and the inner wall of the cylinder (4).

5. The linear power driven bi-directional plunger pump of claim 4, wherein: The first inner diameter shunt one-way valve (71) is a circular ring structure part, the outer wall of which is in sliding sealing cooperation with the inner wall of the cylinder (4), the inside of which is provided with a guide ring (70), the first end of the first spring (21) is abutted against the guide ring (70), the second end is abutted against the end face of the fluid exchange assembly (103), and the first inner diameter shunt one-way valve (71) and the outer wall of the hollow shaft (10) form a first channel (710).

6. The linear power driven bi-directional plunger pump of claim 4, wherein: The first outer diameter shunt check valve (81) is a hollow circular truncated cone structure, comprising a large diameter section (82) and a small diameter section (83), the outer diameter of the large diameter section (82) is smaller than the inner diameter of the cylinder body (4) so that there is a second gap (92) therebetween, the small diameter section (83) is sleeved with a second spring (22), the first end of the second spring (22) abuts on the end face of the large diameter section (82), and the second end abuts on the first locking piece (61).

7. The linear power driven bi-directional plunger pump of claim 4, wherein: The second set of plunger driving mechanisms on the left side comprises a second locking piece (62) fixed on the inner wall of the cylinder body (4), and a second inner diameter shunt check valve (72) and a second outer diameter shunt check valve (85) located on both sides thereof, the inner ring surface of the second locking piece (62) is in sliding sealing cooperation with the hollow shaft (10); the shape of the second inner diameter shunt check valve (72) is the same as that of the first inner diameter shunt check valve (71), and the shape of the second outer diameter shunt check valve (85) is the same as that of the first outer diameter shunt check valve (81).

8. The linear power driven bi-directional plunger pump of claim 7, wherein: Oil seal type sealing pieces (42) are fixedly arranged at both ends of the cylinder body (4), each oil seal type sealing piece (42) is fixed to the cylinder body (4) by a fixing piece (43), and the inner wall of the oil seal type sealing piece (42) is in sliding sealing cooperation with the outer periphery of the hollow shaft (10).

9. The linear power driven bi-directional plunger pump of claim 8, wherein: A third spring (23) is arranged between the second inner diameter shunt check valve (72) and the second locking piece (62), a third channel (720) is formed between the second inner diameter shunt check valve (72) and the outer wall of the hollow shaft (10), the maximum outer diameter of the second outer diameter shunt check valve (85) is smaller than the inner diameter of the cylinder body (4) so that there is a third gap (93) therebetween, a fourth spring (24) is sleeved on the second outer diameter shunt check valve (85), the first end of the fourth spring (24) abuts on the end face of the large diameter section of the second outer diameter shunt check valve (85), and the second end directly or indirectly abuts on the end face of the oil seal type sealing piece (42).

10. The linear power driven bi-directional plunger pump of claim 9, wherein: The hollow shaft (10) further has a third radial hole (106) and a fourth radial hole (107) penetrating the pipe wall of the hollow shaft (10), when the cylinder body (4) and the mover assembly (3) move synchronously, the third radial hole (106) communicates with the second gap (92), and the fourth radial hole (107) communicates with the third gap (93).

11. A linear power driven bidirectional plunger pump comprising a housing (1), a fluid inlet (100) and a fluid outlet (200), a stator assembly (2) and a mover assembly (3) movably arranged relative to the stator assembly (2) are fixedly arranged in the housing (1), characterized in that: The hollow shaft (10) is fixed in the shell (1), and the fluid inlet (100) and the fluid outlet (200) are arranged at two ends of the hollow shaft (10) respectively; the inside of the hollow shaft (10) is provided with a partition (102) for adjusting the liquid flow direction; the shell is further provided with a cylinder (4) which moves synchronously with the mover assembly (3), the cylinder (4) is provided with two sets of plunger driving mechanisms, and is sleeved on the hollow shaft (10) to perform reciprocating motion; the inside of the cylinder (4) is fixed with a fluid exchange assembly (103), the inner wall of the fluid exchange assembly (103) is in sliding sealing cooperation with the outer wall of the hollow shaft (10), the two sets of plunger driving mechanisms are arranged at two sides of the fluid exchange assembly (103) respectively, the mover assembly (3) performs linear reciprocating motion along the central axis of the hollow shaft (10) under the action of electromagnetic force, so as to drive the two sets of plunger driving mechanisms to alternately input and output, and cooperate with the fluid exchange assembly (103) to realize the input of fluid from the fluid inlet (100) and the output of fluid from the fluid outlet (200).

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