Novel plunger pump device and water pumping system
By employing magnetic levitation bearings and a dual-plunger pump structure in the plunger pump, bidirectional piston movement is achieved, solving the problems of frictional loss and low efficiency in unidirectional operation of traditional plunger pumps, and realizing a highly efficient bidirectional pumping effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional plunger pumps suffer from high mechanical bearing friction loss and severe wear, requiring frequent maintenance. They also have low efficiency in unidirectional operation and large pressure pulsation when operating in multiple cylinders, making it difficult to meet the demand for efficient bidirectional water pumping.
Magnetic levitation bearings are used to replace traditional mechanical bearings, and the bidirectional movement of the piston is achieved through a dual-plunger pump mechanism. Combined with inlet and outlet check valves for control, the rotating structure is driven by a drive component to drive the reciprocating motion of the connecting rod and piston rod, thereby achieving bidirectional extraction of liquid.
It reduces frictional losses, improves efficiency, lowers maintenance frequency, achieves efficient bidirectional pumping capability, reduces pressure pulsation, and meets the application requirements of high pressure and high flow rate.
Smart Images
Figure CN224032720U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to plunger pump technical field, especially a kind of novel plunger pump device and pumping system. BACKGROUND
[0002] Plunger pump is an important device of hydraulic system. It relies on plunger reciprocating motion in cylinder, so that the volume of sealed working cavity changes to realize oil absorption, oil pressing. Plunger pump has the advantages of high rated pressure, compact structure, high efficiency and easy flow regulation. Therefore, plunger pump is widely used in high pressure, large flow and flow regulation occasions.
[0003] During the operation of traditional plunger pump, due to the existence of mechanical bearing, large frictional resistance will be generated, which leads to large energy loss. Moreover, mechanical bearing is easy to wear and tear, and needs regular maintenance and replacement, which increases the use cost and downtime. In addition, traditional plunger pump is mostly used for pushing hydraulic oil, adopts linear motion and works unidirectionally with low efficiency. In addition, traditional plunger pump adopts rolling bearing, and bearing friction loss accounts for 18%-22% of total system power. When multiple cylinders are operated, phase synchronization error leads to pressure pulsation up to ±15%(3 times of the allowable value of ISO10767 standard). SUMMARY
[0004] The main purpose of the utility model is to provide a kind of novel plunger pump device and pumping system, which is used for pumping, bidirectional working and high efficiency.
[0005] To achieve the above purpose, the utility model provides a kind of novel plunger pump device, which comprises:
[0006] The novel plunger pump device comprises:
[0007] A driving member;
[0008] Two plunger pump mechanisms, each plunger pump mechanism comprising a rotating structure and two plunger pump structures, the rotating structures of the two plunger pump mechanisms are connected with the driving member respectively, each plunger pump structure comprising a connecting rod, a piston rod, a tank, a piston and two pairs of control valves, one end of the connecting rod is connected with the rotating structure, the other end is connected with one end of the piston rod and can rotate with the rotating structure to pull the piston rod to move;
[0009] The other end of the piston rod can movably pass through the tank, the piston is located in the tank and is sleeved on the piston rod, the two pairs of control valves are arranged on the tank respectively, each pair of control valves comprising a water inlet check valve and a water outlet check valve, the water inlet check valve and the water outlet check valve can communicate with the tank respectively, and can control water inlet or water outlet of the tank.
[0010] In an alternative embodiment, the connecting rod is mounted on the rotating structure by a first magnetic suspension bearing and rotates with the rotating structure.
[0011] In an alternative embodiment, the piston rod is mounted on the second magnetic suspension bearing by a second magnetic suspension bearing respectively, and the second magnetic suspension bearing is located at the upper and lower ends of the tank respectively.
[0012] In an alternative embodiment, the rotating structure comprises a crankshaft, the crankshaft is provided with a balance wheel corresponding to each plunger pump structure, and the connecting rod is connected with the balance wheel.
[0013] In an alternative embodiment, a sealing ring is arranged between the piston and the tank.
[0014] In an alternative embodiment, the rotating structure further comprises a shaft coupling, the shaft coupling connects an output shaft of the driving member with one end of the crankshaft, and the crankshaft is mounted on a third magnetic suspension bearing and a fourth magnetic suspension bearing by a third magnetic suspension bearing and a fourth magnetic suspension respectively.
[0015] In an alternative embodiment, one of the plunger pump structures is connected to the crankshaft, and the other plunger pump structure is connected to the end of the crankshaft.
[0016] In an alternative embodiment, the crankshaft comprises a first shaft part and a second shaft part, one end of the first shaft part is connected with the shaft coupling, the other end is provided with a balance wheel connected with one of the plunger pump structures, one end of the second shaft part is connected with the first shaft part, and the other end is provided with a balance wheel connected with the other plunger pump structure.
[0017] In an alternative embodiment, the center line of the piston rod is perpendicular to the center line of the crankshaft.
[0018] The utility model also provides a water pumping system, the water pumping system includes novel plunger pump device, novel plunger pump device is used for pumping water, and adopts the novel plunger pump device described above.
[0019] Compared with the prior art, the utility model has the following technical effects:
[0020] The utility model technical scheme drives the rotating structure to rotate by driving member and two plunger pump mechanisms, drives the balance wheel on it to rotate, and then drives the connecting rod to move, the connecting rod moves and drives the piston rod to move up and down, the piston rod moves and drives the piston to move in the tank, can suck or push liquid, and simultaneously makes two pairs of control valves open or close during the moving process, so that water can be pumped through the water inlet check valve, water can be discharged through the water outlet check valve, and the control of two pairs of control valves is realized, so that bidirectional water inlet and outlet are realized, and the efficiency is high. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.
[0022] Figure 1 Connection diagram of an embodiment of the novel plunger pump device of the present application;
[0023] Figure 2 Connection diagram of an embodiment of the novel plunger pump device of the present application; Figure 1 Connection diagram of an embodiment of the novel plunger pump device of the present application;
[0024] Explanation of reference numerals:
[0025] Reference Name Reference Name 300 Novel plunger pump device 200 Driving member 100 Plunger pump mechanism 10 Rotary structure 90 Plunger pump structure 150 Counterweight 30 Linkage 40 Piston rod 50 Tank body 60 Piston 70 Control valve 71 Water inlet check valve 72 Water outlet check valve 61 Sealing ring 11 Coupling 152 Second shaft portion 15 Crankshaft 151 First shaft portion
[0026] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0029] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that the technical solutions can be realized by those skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.
[0030] Embodiment 1
[0031] Please refer to Figures 1-2 The utility model discloses a novel plunger pump device 300, the novel plunger pump device 300 includes drive piece 200 and two plunger pump mechanism 100,
[0032] Each plunger pump mechanism 100 includes rotating structure 10 and two plunger pump structure 90, the rotating structure 10 of two plunger pump mechanism 100 is connected with drive piece 200 respectively, and each plunger pump structure 90 includes connecting rod 30, piston rod 40, tank 50, piston 60 and two pairs of control valve 70, one end of connecting rod 30 is connected with rotating structure 10, and the other end is connected with one end of piston rod 40, and connecting rod 30 can rotate with rotating structure 10 and pull piston rod 40 to move.
[0033] The other end of piston rod 40 movably passes through tank 50, piston 60 is located in tank 50 and is sleeved on piston rod 40, and two pairs of control valve 70 are arranged on tank 50 respectively and are close to two ends of tank 50 respectively.
[0034] Each pair of control valve 70 includes water inlet check valve 71 and water outlet check valve 72, water inlet check valve 71 and water outlet check valve 72 can communicate with tank 50 respectively and can control water inlet or water outlet of tank 50, rotating structure 10 is driven to rotate by drive piece 200, connecting rod 30 of two plunger pump structure 90 is driven to rotate by rotating structure 10, connecting rod 30 is pulled to move up and down by piston rod 40, and then piston 60 is driven to move up and down in tank 50, two pairs of control valve 70 are opened or closed to realize water inlet and water delivery, and reciprocating realizes bidirectional work, and efficiency is improved.
[0035] Specifically, drive piece 200 is variable-frequency speed regulation direct drive motor, and is provided with two output shafts.Two plunger pump mechanism 100 is connected with two output shafts respectively, wherein motor rotating speed range: 50~600rpm (speed regulation accuracy ±0.1rpm).
[0036] Please continue to refer to Figures 1-2 In the embodiment, rotating structure 10 includes shaft coupling 11 and crankshaft 15.
[0037] Specifically, shaft coupling 11 connects the output shaft of drive piece 200 with one end of crankshaft 15, and crankshaft 15 is installed on third magnetic suspension bearing seat and fourth magnetic suspension bearing seat through third magnetic suspension bearing and fourth magnetic suspension respectively, so that the rotation and vibration of crankshaft 15 can be stabilized.
[0038] The crankshaft 15 is provided with a balance wheel 150 corresponding to each plunger pump structure 90, and the connecting rod 30 of the plunger pump structure 90 is connected with the balance wheel 150 and rotates with the balance wheel 150.
[0039] Further, the crankshaft 15 comprises a first shaft part 151 and a second shaft part 152, one end of the first shaft part 151 is connected with the coupling 11 by using conventional technology, and the other end is provided with the balance wheel 150 connected with one of the plunger pump structures 90, and the other end of the second shaft part 152 is provided with the balance wheel 150 connected with the other plunger pump structure 90.
[0040] When the driving member 200 works, it drives the output shaft to rotate, thereby driving the first shaft part 151 to rotate, and the first shaft part 151 drives one of the plunger pump structures 90 and the second shaft part 152 to rotate. The second shaft part 152 drives the balance wheel 150 of the other plunger pump structure 90 to rotate.
[0041] In the embodiment, the balance wheel 150 of the plunger pump structure 90 can be directly connected to the end of the first shaft part 151, and the first shaft part 151 and the second shaft part 152 are connected through the connecting shaft.
[0042] Further, in order to be more stable, the second shaft part 152 of the crankshaft 15 is installed on a fifth magnetic suspension bearing seat through a fifth magnetic suspension bearing, and in order to balance the weight, the counterweight 21 is arranged on the balance wheel 150, thereby realizing vibration compensation.
[0043] It can be understood that, in order to control the driving member 200, the new plunger pump device 300 further comprises a control module, the control module is electrically connected with the driving member 200 and is used for controlling the driving member 200. The control module comprises a control unit, which can be a controller, a microcontroller, a microprocessor or other data processing chips, and will not be described here.
[0044] In the application, one end of the connecting rod 30 is installed on the balance wheel 150 through a first magnetic suspension bearing and can rotate with the balance wheel 150. The connecting position of the connecting rod 30 and the balance wheel 150 is not on the center point of the balance wheel 150. The other end of the connecting rod 30 is connected with the upper end of the piston rod 40 through a pin shaft or the like.
[0045] Further, the piston rod 40 is respectively installed on two second magnetic suspension bearing seats through two second magnetic suspension bearings, and the two second magnetic suspension bearing seats are respectively located at the upper and lower ends of the tank body 50, so that the piston rod 40 can move up and down relative to the tank body 50. In the embodiment, the center line of the piston rod 40 is perpendicular to the center line of the rotating shaft.
[0046] In the embodiment, a sealing ring 61 is arranged between the piston 60 and the tank body 50. The sealing ring 61 has a pressure resistance of 40 MPa.
[0047] In use, the driving member 200 is controlled to work to drive the output shaft to rotate, thereby driving the crankshaft 15 to rotate, and the crankshaft 15 drives the balance wheel 150 on it to rotate, and the balance wheel 150 drives one end of the connecting rod 30 on it to rotate, and the other end of the connecting rod 30 moves linearly, thereby pulling the piston rod 40 to move up and down. When the piston 60 moves up with the piston rod 40, the water inlet check valve 71 close to the lower end is opened, at this time, negative pressure is generated below the piston 60, and water is sucked into the tank body 50 through the water inlet check valve 71. When the piston rod 40 moves down to push the piston 60 to move down, the water inlet check valve 71 at the lower end is closed, and the water outlet check valve 72 at the lower end is opened, and water is pushed out through the water outlet check valve 72 by the downward movement of the piston 60, so that the purpose of pumping water can be achieved. At the same time, when the piston 60 moves down, the water inlet check valve 71 at the upper end is opened, the water outlet check valve 72 is closed, water is introduced into the tank body 50 above the piston 60 through the water inlet check valve 71 at the upper end, and when the piston rod 40 moves up again, the water outlet check valve 72 at the upper end of the tank body 50 is opened, and the water inlet check valve 71 is closed. In this way, the piston 60 moves up to push water out through the water outlet check valve 72, so that bidirectional water pumping is realized, and the efficiency is high.
[0048] It can be understood that the application can be used to extract other liquids, and the bearing seat adopts a Halbach permanent magnet array + electromagnetic auxiliary structure. The water inlet check valve and the water outlet check valve can be a silent check valve, which is a valve that is opened and closed automatically by relying on the flow of the medium itself, and is used to prevent the medium from flowing backward.
[0049] Embodiment 2
[0050] Please refer to Figures 1-2 The second embodiment of the utility model discloses a water pumping system, the water pumping system includes novel plunger pump device, the specific structure of novel plunger pump device 300 refers to the above-mentioned embodiment, because novel plunger pump device 300 adopts all the technical solutions of the above-mentioned embodiment, therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, here will not repeat.
[0051] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and all equivalent structural transformations made under the inventive concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.
Claims
1. A novel plunger pump device, characterized in that, The novel plunger pump device includes: Drive components; A two-plunger pump mechanism, each plunger pump mechanism includes a rotating structure and two plunger pump structures. The rotating structures of the two plunger pump mechanisms are respectively connected to the driving component. Each plunger pump structure includes a connecting rod, a piston rod, a tank, a piston, and two pairs of control valves. One end of the connecting rod is connected to the rotating structure, and the other end is connected to one end of the piston rod, and can pull the piston rod to move as the rotating structure rotates. The other end of the piston rod can be movably passed through the tank body. The piston is located inside the tank body and is sleeved on the piston rod. The two pairs of control valves are respectively installed on the tank body. Each pair of control valves includes an inlet check valve and an outlet check valve. The inlet check valve and the outlet check valve can communicate with the tank body and can control the tank body to receive or discharge water.
2. The novel plunger pump device as described in claim 1, characterized in that, The connecting rod is mounted on the rotating structure via a first magnetic levitation bearing and rotates with the rotating structure.
3. The novel plunger pump device as described in claim 1, characterized in that, The piston rod is mounted on two second magnetic bearing seats via two second magnetic levitation bearings, and the two second magnetic levitation bearing seats are located at the upper and lower ends of the tank body, respectively.
4. The novel plunger pump device as described in claim 1, characterized in that, The rotating structure includes a crankshaft, and a balance wheel is provided on the crankshaft for each plunger pump structure. The connecting rod is connected to the balance wheel.
5. The novel plunger pump device as described in claim 4, characterized in that, A sealing ring is provided between the piston and the tank body.
6. A novel plunger pump device as described in any one of claims 4 or 5, characterized in that, The rotating structure also includes a coupling that connects the output shaft of the drive component to one end of the crankshaft. The crankshaft is mounted on a third magnetic levitation bearing seat and a fourth magnetic levitation bearing seat respectively via a third magnetic levitation bearing and a fourth magnetic levitation bearing.
7. A novel plunger pump device as described in claim 6, characterized in that, One of the plunger pump structures is connected to the crankshaft, and another plunger pump structure is connected to its end.
8. A novel plunger pump device as described in claim 7, characterized in that, The crankshaft includes a first shaft portion and a second shaft portion. One end of the first shaft portion is connected to the coupling, and the other end is provided with a balance wheel connected to one of the plunger pump structures. One end of the second shaft portion is connected to the first shaft portion, and the other end is provided with a balance wheel connected to another plunger pump structure.
9. A novel plunger pump device as described in claim 6, characterized in that, The centerline of the piston rod is perpendicular to the centerline of the crankshaft.
10. A pumping system, characterized in that, The pumping system includes a novel plunger pump device for pumping water, and employs the novel plunger pump device described in any one of claims 1-9.