Variable flow plunger pump

Abstract

The invention relates to the technical field of plunger pumps, in particular to a variable flow plunger pump which comprises a driving unit, a plurality of variable pumps, a plurality of variable flow executing mechanisms and a transmission mechanism. The variable pumps are connected with the driving unit; the variable flow executing mechanisms are connected with the variable pump. The transmission mechanism comprises a plurality of driving transmission parts and a driven transmission part, the driving transmission parts are located on the outer side of the driven transmission part and connected with the driven transmission part, and the driving transmission parts are connected with the variable flow executing mechanism. According to the variable-flow plunger pump, the variable pump is driven by the driving unit to output variable-flow hydraulic oil, large-range real-time adjustment of flow can be achieved through cooperation of the variable pump and the variable-flow executing mechanism and variable-flow control, adjustment is accurate, and large-torque output of the variable-flow executing mechanism at different rotating speeds is guaranteed; the multiple driving transmission pieces drive one driven transmission piece to rotate, stress is uniform, the abrasion loss is reduced, and the structure is more compact.

Description

Technical Field

[0001] The present invention relates to the technical field of plunger pumps, and in particular to a variable flow rate plunger pump. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder block to change the volume of the sealed working chamber to achieve liquid suction and discharge. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, and convenient flow regulation.

[0003] The reciprocating plunger pumps in coal mines represented by the emulsion pumps and spray pumps in traditional fully mechanized mining faces are all fixed-displacement pumps. Although the flow rate can be adjusted by frequency conversion speed regulation in related technologies, due to the long response time of frequency conversion speed regulation and the limitation of the motor torque, speed regulation cannot be performed at low speeds, and it cannot meet the large-range real-time precise regulation of the flow rate. Since high-power explosion-proof servo motors have not been commercially applied, the variable flow rate control of reciprocating plunger pumps in coal mines is a difficult problem to be solved in related technologies. Summary of the Invention

[0004] The present invention provides a variable flow rate plunger pump to solve the defect that the existing plunger pump has insufficient large-range real-time regulation of the flow rate.

[0005] The present invention provides a variable flow rate plunger pump, including: A drive unit; A plurality of variable displacement pumps, connected to the drive unit, for outputting variable flow rate media; A plurality of variable flow rate actuators, respectively connected to the variable displacement pumps in one-to-one correspondence, for converting the hydraulic energy carried by the output variable flow rate media into mechanical energy; A transmission mechanism, including: a plurality of driving transmission parts and a driven transmission part, and the plurality of driving transmission parts are located outside the driven transmission part and connected to the driven transmission part, and the driving transmission parts are connected to the variable flow rate actuators in one-to-one correspondence.

[0006] According to the variable flow rate plunger pump provided by the present invention, the transmission mechanism includes: a gear gearbox, the driving transmission parts include: driving gears, and the driven transmission part includes: a driven gear; The plurality of driving gears are arranged at equal intervals around the circumference of the driven gear outside the driven gear, and each driving gear is connected to the driven gear.

[0007] According to the variable flow rate plunger pump provided by the present invention, three driving gears are provided, and the three driving gears are evenly distributed in an equilateral triangle outside the driven gear.

[0008] According to the variable flow plunger pump provided by the present invention, the variable flow actuator is provided on the end wall of the gearbox, and a plurality of the variable flow actuators are evenly spaced in the circumferential direction of the end wall of the gearbox.

[0009] According to the variable flow plunger pump provided by the present invention, three variable flow actuators are provided, and the three variable flow actuators are evenly distributed on the end wall of the gearbox in an equilateral triangle, and the positions in the radial direction of the gearbox are consistent with the corresponding active transmission parts.

[0010] According to the variable flow plunger pump provided by the present invention, a plurality of the variable pumps are connected in sequence to form a series pump group, and the series pump group extends in the direction from the drive unit to the variable flow actuator.

[0011] The variable flow plunger pump provided by the present invention further includes: A plurality of connecting pipes, which are connected between the variable pumps and the variable flow actuators in a one-to-one correspondence.

[0012] The variable flow plunger pump provided by the present invention further includes: A plurality of first mounting seats, which are fixed on the outside of the variable flow actuator, and the liquid outlet ends of the connecting pipes are fixed on the first mounting seats.

[0013] The variable flow plunger pump provided by the present invention further includes: A filter, one end of which is connected to the medium outlet end of the variable flow actuator; A cooler, one end of which is connected to the other end of the filter; A medium tank, which is used for storing the medium, one end of which is connected to the other end of the cooler, and the other end is connected to the variable pump.

[0014] The variable flow plunger pump provided by the present invention further includes: A radial pump, which has a crankshaft, and the crankshaft is connected to the passive transmission part.

[0015] A variable-flow piston pump provided by the present invention comprises: a driving unit, a plurality of variable pumps, a plurality of variable-flow actuators and a transmission mechanism. The plurality of variable pumps are connected to the driving unit and used for outputting variable-flow media; the plurality of variable-flow actuators are respectively connected to the variable pumps in one-to-one correspondence and used for converting the hydraulic energy carried by the output variable-flow media into mechanical energy; the transmission mechanism comprises: a plurality of driving transmission members and a driven transmission member, the plurality of driving transmission members are located outside the driven transmission member and connected to the driven transmission member, and the driving transmission members are connected to the variable-flow actuators in one-to-one correspondence. The variable-flow piston pump provided by the present invention drives the variable pumps by the driving unit to output hydraulic oil with variable flow rate. By utilizing the cooperation between the variable pumps and the variable-flow actuators and through the control of variable flow rate, large-range real-time adjustment of the flow rate can be realized, and the adjustment is accurate, which can ensure large-torque output of the variable-flow actuators at different rotational speeds; by driving a driven transmission member to rotate by a plurality of driving transmission members, the force is more uniform, the wear amount is reduced, and the structure of the transmission mechanism is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a top view of the variable-flow piston pump provided in one embodiment of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the variable-flow piston pump provided in one embodiment of the present invention from a first perspective.

[0019] Figure 3 It is a schematic structural diagram of the variable-flow piston pump provided in one embodiment of the present invention from a second perspective.

[0020] Figure 4 It is a sectional view of the gearbox provided in one embodiment of the present invention.

[0021] Figure 5 It is a schematic structural diagram of the variable-flow actuator on the gearbox provided in one embodiment of the present invention.

[0022] Reference numerals: 1: Driving unit; 2: Second mounting base; 3: Bell housing; 4: Series pump set; 41: Variable pump; 5: First mounting base; 6: Connecting pipe; 7: Variable flow actuator; 8: Gear transmission; 81: Driving gear; 82: Driven gear; 9: Radial pump; 101: Filter; 102: Cooler; 11: Pump station controller. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0024] In the description of the present embodiment, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present embodiment.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present embodiment, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0026] In the present embodiment, unless otherwise clearly specified and limited, terms such as "set", "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present embodiment can be understood according to specific circumstances.

[0027] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0028] The following will combine Figures 1 - 5 to describe a variable flow plunger pump of the present invention. The variable flow plunger pump includes: a drive unit 1, a plurality of variable pumps 41, a plurality of variable flow actuators 7, and a transmission mechanism.

[0029] Among them, the plurality of variable pumps 41 are connected to the drive unit 1 and are used to output variable flow media; the plurality of variable flow actuators 7 are respectively connected to the variable pumps 41 in a one-to-one correspondence and are used to convert the hydraulic energy carried by the output variable flow media into mechanical energy; the transmission mechanism includes: a plurality of active transmission parts and a passive transmission part, and the plurality of active transmission parts are located outside the passive transmission part and are connected to the passive transmission part, and the active transmission parts are connected to the variable flow actuators 7 in a one-to-one correspondence.

[0030] Specifically, the drive unit 1 may adopt a drive motor, and specifically an explosion-proof motor, to provide a power source for the variable flow plunger pump.

[0031] The variable pump 41 is connected to a media tank, and hydraulic oil is stored in the media tank. The drive unit 1 provides power for the variable pump 41, sucks out the hydraulic oil from the media tank and outputs it. The variable pump 41 is a pump that can adjust its output flow or pressure. Its main feature is that it can automatically adjust its displacement or output pressure according to the needs of the system, thereby improving efficiency and reducing energy loss. The drive unit 1 drives the variable pump 41 to output hydraulic oil with variable flow.

[0032] The variable flow actuator 7 is used to convert the hydraulic energy carried by the hydraulic oil into mechanical energy. A variable hydraulic motor can be adopted, and different torques are output according to the variable flow media output by the variable pump 41. By using the cooperation of the variable pump 41 and the variable flow actuator 7, through the control of variable flow, a large range of real-time adjustment of the flow can be realized, and the adjustment is accurate, and it can ensure the large torque output of the variable flow actuator 7 at different rotational speeds.

[0033] The transmission mechanism consists of at least multiple driving transmission components and one driven transmission component. The driving transmission components are connected to the variable flow actuator 7, and the variable flow actuator 7 drives the driving transmission components to rotate. Multiple driving transmission components are all connected to one driven transmission component, and multiple driving transmission components drive one driven transmission component to rotate. The force is more evenly distributed, reducing the wear amount and making the structure of the transmission mechanism more compact. It can be understood that, relative to the driven transmission component, the driving transmission component is driven to move actively by the variable flow actuator 7, while the driven transmission component is driven to move passively by the driving transmission component.

[0034] Further, in the transmission structure, the driven transmission component is used to connect the pump body at the end. By the rotation of the driven transmission component, the pump body is driven to achieve the effect of variable flow output of the pump body.

[0035] A variable flow piston pump provided by the present invention includes: a driving unit 1, multiple variable pumps 41, multiple variable flow actuators 7, and a transmission mechanism. Multiple variable pumps 41 are connected to the driving unit 1 and are used to output variable flow media; multiple variable flow actuators 7 are respectively connected to the variable pumps 41 in one-to-one correspondence and are used to convert the hydraulic energy carried by the output variable flow media into mechanical energy; the transmission mechanism includes: multiple driving transmission components and one driven transmission component, and multiple driving transmission components are located outside the driven transmission component and are connected to the driven transmission component. The driving transmission components are connected to the variable flow actuators 7 in one-to-one correspondence. The variable flow piston pump provided by the present invention drives the variable pumps 41 to output hydraulic oil with variable flow through the driving unit 1. By the cooperation of the variable pumps 41 and the variable flow actuators 7, through the control of variable flow, large-range real-time adjustment of the flow rate can be realized, and the adjustment is accurate, which can ensure the large-torque output of the variable flow actuator 7 at different rotational speeds; by multiple driving transmission components driving one driven transmission component to rotate, the force is more evenly distributed, reducing the wear amount and making the structure of the transmission mechanism more compact.

[0036] In one embodiment of the present invention, the transmission mechanism includes: a gearbox 8, the driving transmission member includes: a driving gear 81, and the driven transmission member includes: a driven gear 82. A plurality of driving gears 81 are arranged at equal intervals in the circumferential direction around the driven gear 82 on the outside of the driven gear 82, and each driving gear 81 is connected to the driven gear 82. Specifically, the transmission mechanism adopts a gear transmission method, specifically using the structure of the gearbox 8, the internal driving transmission member uses the driving gear 81, and the driven transmission member uses the driven gear 82. Preferably, the driving gear 81 is a small gear, and the driven gear 82 is a large gear. The small gear is arranged along the circumferential direction of the large gear, that is, the diameter of the driving gear 81 is smaller than that of the driven gear 82. Through the diameter ratio between the driving gear 81 and the driven gear 82, the transmission ratio can be adjusted, forming a planetary gear structure with a relatively large transmission ratio; and each small gear meshes with the large gear, and the rotation of a plurality of small gears drives the large gear to rotate. In this embodiment, a plurality of driving gears 81 drive one driven gear 82 to rotate, and the input shafts of the plurality of driving gears 81 are evenly distributed on the driven gear 82, with stable transmission, uniform force, less wear, and a more compact structure.

[0037] In one embodiment of the present invention, three driving gears 81 are provided, and the three driving gears 81 are evenly distributed in an equilateral triangle on the outside of the driven gear 82. In this embodiment, three driving gears 81 are provided. Correspondingly, three variable displacement pumps 41 and three variable flow actuators 7 are provided and are connected to the driving gears 81 in a one-to-one correspondence. In this embodiment, the triangular structure formed by the three driving gears 81, specifically an equilateral triangle structure, on the one hand ensures its stable connection with the driven gear 82, and on the other hand evenly distributes it on the outside of the driven gear 82, with more uniform force.

[0038] In one embodiment of the present invention, the variable flow actuator 7 is arranged on the end wall of the gearbox 8, and a plurality of variable flow actuators 7 are evenly spaced in the circumferential direction of the end wall of the gearbox 8. Preferably, three variable flow actuators 7 are provided, and the three variable flow actuators 7 are evenly distributed in an equilateral triangle on the end wall of the gearbox 8, and their positions in the radial direction of the gearbox 8 are consistent with the corresponding driving transmission members. Preferably, the variable flow actuator 7 adopts a variable flow hydraulic motor. In this embodiment, three variable flow hydraulic motors are fixed on the gearbox 8 and evenly arranged on the end face of the gearbox 8 to synchronously load the input shaft, making the force more uniform.

[0039] In one embodiment of the present invention, a spline is machined inside the hydraulic motor, and the input shaft of the driving gear 81 in the gearbox 8 is connected through the spline and synchronously drives the driving gear 81 to rotate.

[0040] In one embodiment of the present invention, a plurality of variable pumps 41 are connected in sequence to form a series pump group 4, and the series pump group 4 extends in the direction from the drive unit 1 to the variable flow actuator 7. Preferably, three variable pumps 41 are provided, and the three variable pumps 41 are connected in series to form the structure of the series pump group 4. Through the layout structure of the series pump group 4, the fluid passes through each variable pump 41 in sequence, and the output of the previous variable pump 41 serves as the input of the next variable pump 41; the main purpose of the series pump group 4 is to increase the total head of the system (i.e., the ability of the variable pump 41 to lift the liquid or overcome the pipeline resistance), rather than directly increasing the flow rate. The flow rate processed by each variable pump 41 in the series pump group 4 is the same, ensuring that the rotational speeds of the driving gears 81 are consistent. In addition, considering the head problem of the piston pump, more pumps can be connected in series on the basis of the three variable pumps 41 to increase the total head of the system. When a single variable pump 41 cannot provide sufficient head to meet the specific application requirements, this problem can be solved by connecting a second pump body in series upstream of the variable pump 41.

[0041] In one embodiment of the present invention, the variable flow piston pump further includes: a plurality of connecting pipes 6, and the connecting pipes 6 are respectively connected between the variable pump 41 and the variable flow actuator 7. The number of arranged connecting pipes 6 is the same as the number of arrangements of the variable pump 41, the variable flow actuator 7, and the active transmission member; taking the number of arrangements as three as an example, each connecting pipe 6 is connected between the corresponding variable pump 41 and the variable flow actuator 7 for transmitting hydraulic oil. Preferably, in order to ensure the stable and safe transmission of hydraulic oil, the connecting pipes 6 are made of high-pressure rubber hoses.

[0042] In one embodiment of the present invention, the variable flow piston pump further includes: a plurality of first mounting seats 5, which are fixed on the outside of the variable flow actuator 7, and the liquid outlet ends of the connecting pipes 6 are fixed on the first mounting seats 5. In this embodiment, the connecting pipes 6 are fixed and connected through the first mounting seats 5 to ensure the stable and safe connection between the connecting pipes 6 and the variable flow actuator 7.

[0043] In one embodiment of the present invention, the variable flow rate piston pump further includes: a filter 101, a cooler 102, and a medium tank. Specifically, one end of the filter 101 is connected to the medium outlet end of the variable flow rate actuator 7; one end of the cooler 102 is connected to the other end of the filter 101; the medium tank is used for storing the medium, and one end is connected to the other end of the cooler 102, and the other end is connected to the variable pump 41. Specifically, the medium tank is used for storing hydraulic oil. The variable pump 41 pumps the hydraulic oil from the medium tank and conveys it to the variable flow rate actuator 7 through a high-pressure hose. The lower liquid outlet of the variable flow rate actuator 7 is connected to the filter 101 and the cooler 102 through a high-pressure hose, and finally returns to the medium tank to complete the working cycle. In this embodiment, the filter 101 is used to filter the returned hydraulic oil, and the cooler 102 is used to cool down the returned hydraulic oil, and finally store it in the medium tank for the recycled use of the hydraulic oil.

[0044] In one embodiment of the present invention, the variable flow rate piston pump further includes: a radial pump 9, which has a crankshaft, and the crankshaft is connected to a passive transmission member. Specifically, the radial pump 9 is a type of centrifugal pump, in which the liquid is accelerated in a direction perpendicular to the pump shaft and flows out radially; this pump transfers energy to the fluid through one or more rotating impellers, so that the fluid obtains velocity and pressure energy.

[0045] In one embodiment of the present invention, the variable flow rate piston pump further includes: a second mounting seat 2, which serves as a support structure for each component on the variable flow rate piston pump, and mounts the drive unit 1, the variable pump 41, the variable flow rate actuator 7, and the transmission mechanism on the second mounting seat 2.

[0046] In one embodiment of the present invention, the variable flow rate piston pump further includes: a bell-shaped cover 3, which is arranged between the drive unit 1 and the variable pump 41, and is specifically connected to one end of the drive unit 1 and the series pump group 4 composed of multiple variable pumps 41.

[0047] In one embodiment of the present invention, the variable flow rate piston pump further includes: a pump station controller 11, which is fixed on the second mounting seat 2 and is used to control each device on the variable flow rate piston pump. Specifically, the pump station controller 11 can be electrically connected to the drive unit 1 and is used to control the working state of the drive unit 1.

[0048] Based on the above-mentioned multiple embodiments, the working process of the variable flow rate piston pump provided by the present invention is as follows: Start the drive motor, drive the motor to rotate, drive each variable pump 41 to operate, extract hydraulic oil from the medium box, and transport it to the corresponding variable flow actuator 7 through the corresponding high-pressure hose, convert hydraulic energy into mechanical energy, and the mechanical energy output by the variable flow actuator 7 drives the active transmission part to rotate, and then the passive transmission part connected to the active transmission part rotates synchronously. According to the diameter ratio of the active transmission part and the passive rotating part, the corresponding transmission ratio can be obtained. The passive transmission part is connected to the crankshaft of the radial pump 9 and drives the radial pump 9 to operate.

[0049] The variable flow control is utilized to realize that the variable flow actuator 7 can ensure a large torque to drive the radial pump 9 at different speeds, so as to achieve the purpose of variable flow of the radial pump 9.

[0050] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed over multiple units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those of ordinary skill in the art may understand and implement the present invention without creative effort.

[0051] 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable flow plunger pump, characterized in that, Comprising: A drive unit (1); A plurality of variable pumps (41), connected to the drive unit (1) for outputting variable flow rate medium; A plurality of variable flow rate actuators (7), respectively connected to the variable pumps (41) in a one-to-one correspondence, for converting the hydraulic energy carried by the output variable flow rate medium into mechanical energy; A transmission mechanism, comprising: a plurality of driving transmission members and a driven transmission member, and the plurality of driving transmission members are located outside the driven transmission member and connected to the driven transmission member, and the driving transmission members are connected to the variable flow rate actuators (7) in a one-to-one correspondence.

2. The variable flow plunger pump according to claim 1, characterized in that, The transmission mechanism comprises: a gearbox (8), the driving transmission members comprise: driving gears (81), and the driven transmission member comprises: a driven gear (82); The plurality of driving gears (81) are arranged at equal intervals circumferentially around the driven gear (82) outside the driven gear (82), and each driving gear (81) is connected to the driven gear (82).

3. The variable flow plunger pump according to claim 2, characterized in that Three driving gears (81) are provided, and the three driving gears (81) are evenly distributed in an equilateral triangle outside the driven gear (82).

4. The variable flow plunger pump according to claim 2, wherein, The variable flow rate actuators (7) are arranged on the end wall of the gearbox (8), and the plurality of variable flow rate actuators (7) are evenly arranged at equal intervals in the circumferential direction of the end wall of the gearbox (8).

5. The variable flow plunger pump according to claim 4, wherein Three variable flow rate actuators (7) are provided, and the three variable flow rate actuators (7) are evenly distributed in an equilateral triangle on the end wall of the gearbox (8), and the positions in the radial direction of the gearbox (8) are consistent with the corresponding driving transmission members.

6. The variable flow plunger pump according to claim 1, characterized in that, The plurality of variable pumps (41) are connected in sequence to form a series pump group (4), and the series pump group (4) extends in the direction from the drive unit (1) to the variable flow rate actuator (7).

7. The variable flow plunger pump according to claim 1, characterized in that, Further comprising: A plurality of connecting pipes (6), which are respectively connected between the variable pumps (41) and the variable flow rate actuators (7).

8. The variable flow plunger pump according to claim 7, wherein Further comprising: A plurality of first mounting seats (5), fixed outside the variable flow rate actuators (7), and the liquid outlet ends of the connecting pipes (6) are fixed on the first mounting seats (5).

9. The variable flow plunger pump according to claim 1, characterized in that Further comprising: A filter (101), one end of which is connected to the medium outlet end of the variable flow rate actuator (7); A cooler (102), one end of which is connected to the other end of the filter (101); A medium tank for storing medium, one end of which is connected to the other end of the cooler (102), and the other end is connected to the variable pump (41).

10. The variable flow plunger pump according to any one of claims 1 to 9, characterized in that, Further comprising: A radial pump (9), having a crankshaft, and the crankshaft is connected to the driven transmission member.

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