CN117905668A - Piston pump station - Google Patents

Abstract

The invention relates to the field of pump stations, and provides a plunger pump station, wherein the plunger pump station comprises: the reciprocating plunger pump comprises a gear box, wherein a first end of the gear box is provided with a first spigot; the end face of the frequency conversion integrated machine is provided with a second spigot, and the first spigot and the second spigot are radially positioned and matched; one end of the crowned tooth coupler is connected with a gear shaft of the gear box, and the other end of the crowned tooth coupler is connected with a motor shaft of the frequency conversion integrated machine. The device is used for solving at least one of the problems of complicated assembly and leveling, complex structure and high failure rate in the prior art. According to the plunger pump station provided by the invention, the radial positioning of the reciprocating plunger pump and the frequency conversion integrated machine is realized through the first spigot and the second spigot, so that the centering efficiency and centering precision are improved, and the assembly is simpler; the variable frequency integrated machine is adopted to enable the volume of the plunger pump station to be smaller, the drum-shaped gear coupling is adopted for connection transmission, larger angular displacement can be allowed, the contact condition of teeth can be improved, the torque transmission capacity is improved, and the service life is prolonged.

Description

Piston pump station

Technical Field

The present invention relates to the technical field of pump stations, and in particular to a plunger pump station.

Background technique

Reciprocating plunger pump is an indispensable product in industrial pumps. Its outstanding features are: high discharge pressure can be obtained, and the flow rate is independent of pressure. It is suitable for a wide range of conveying media, has good suction performance, high efficiency, and the performance of the pump does not change with the pressure and viscosity of the conveying medium. In the current situation of energy shortage in the world, reciprocating pumps, as energy-saving products, play an important role in coal mining, underground fracturing, oil mining, pipeline coal transportation, coal gas chemical industry, power station slag discharge, mining, etc. There are many subdivisions of reciprocating plunger pumps, and underground coal mine fracturing pump stations are the most typical one.

Fracturing pump station is a device that converts electrical energy or other energy into mechanical energy, performs work on fracturing fluid through its internal structure, and then converts it into hydraulic energy of fracturing fluid. Fracturing pump station is suitable for pumping various non-viscous liquids or viscous liquids (such as clean water, crude oil, acid, mud, sand liquid, etc.) that are not highly corrosive. It is often used in coal seam fracturing, top and bottom plate penetration, hole punching and hole digging, coal seam water injection, pipeline application, and fluid power with adjustable pressure and flow in underground coal mines. Fracturing pump station can be used for single-machine or multi-machine joint construction. The working principle of fracturing pump is to drive the plunger to do reciprocating motion by the rotation of the crankshaft to achieve liquid suction and discharge.

The existing fracturing pump station includes an industrial frequency motor, a hydraulic transmission and a fracturing pump. The fracturing pump and the hydraulic transmission are connected through a ball joint coupling. The fracturing pump and the hydraulic transmission are installed on the first trolley. The industrial frequency motor and the hydraulic transmission are installed on the second trolley with a high-pressure gas source. The first trolley and the second trolley are connected by a joint. The height of the legs of the first trolley and the second trolley is adjusted to make the axis of the industrial frequency motor parallel to the axis of the hydraulic transmission. Each time the construction is carried out, the first trolley and the second trolley need to be connected and the two trolleys need to be adjusted to be coplanar. The use of the hydraulic transmission requires a pneumatic gear system, which has many parts and low reliability. The pneumatic gear shift system cannot shift gears when the air pressure is low or the hydraulic transmission oil temperature is too high or high and low, and there are problems such as difficulty in upshifting and downshifting.

Summary of the invention

The present invention provides a plunger pump station, which is used to solve at least one of the problems of complicated assembly and leveling, complex structure and high failure rate in the prior art, and realizes more convenient installation and assembly, simple structure, low failure rate and convenient maintenance.

The present invention provides a plunger pump station, comprising:

A reciprocating piston pump, the reciprocating piston pump comprising a gear box, a first end of the gear box being provided with a first stop;

A frequency conversion integrated machine, wherein the end surface of the frequency conversion integrated machine is provided with a second stopper, and the first stopper and the second stopper are radially positioned and matched;

A drum gear coupling, one end of which is connected to the gear shaft of the gear box, and the other end of which is connected to the motor shaft of the frequency converter.

According to the plunger pump station provided by the present invention, the second end of the gear box is provided with a third stop;

The reciprocating piston pump further comprises a crankcase, an end surface of which is provided with a fourth stop, and the third stop is radially positioned and matched with the fourth stop.

According to the plunger pump station provided by the present invention, the drum gear coupling comprises:

Internal gear ring;

a first externally toothed flange, wherein external teeth of the first externally toothed flange mesh with internal teeth of the inner gear ring, and the first externally toothed flange is key-connected to the gear shaft;

A second externally toothed flange, wherein the external teeth of the second externally toothed flange mesh with the internal teeth of the internal gear ring, and the second externally toothed flange is key-connected to the motor shaft.

According to the plunger pump station provided by the present invention, the reciprocating plunger pump further comprises a hydraulic end, the hydraulic end is disposed on one side of the crankcase, and the crankcase is connected to the hydraulic end.

The plunger pump station provided according to the present invention further includes a lubrication and cooling system, wherein the lubrication and cooling system includes an oil cooler, and the oil cooler is placed below the crankcase.

The plunger pump station provided according to the present invention further comprises a base frame, and the reciprocating plunger pump and the frequency conversion integrated machine are both mounted on the base frame.

According to the plunger pump station provided by the present invention, the base frame comprises:

A first mounting seat, the first mounting seat is used to mount the frequency conversion integrated machine;

A second mounting seat, wherein the second mounting seat is used to mount the gear box;

A third mounting seat, the third mounting seat is used to mount the crankcase, the third mounting seat is arched, and the third mounting seat is higher than the first mounting seat and the second mounting seat;

Wherein, the second mounting seat is placed between the first mounting seat and the third mounting seat.

The plunger pump station provided according to the present invention further comprises a lubricating oil tank, and the lubricating oil tank is placed below the gear box.

According to the plunger pump station provided by the present invention, the gear box includes an output gear, the output gear is meshed with the gear shaft, and the output gear is connected to the crankshaft key of the crankcase.

According to the plunger pump station provided by the present invention, the lubrication and cooling system further comprises:

a first tubular one-way valve, one end of which is connected to the built-in lubrication assembly;

a second tubular one-way valve, one end of which is connected to the external lubrication assembly;

Wherein, the first tubular one-way valve and the second tubular one-way valve are connected to the oil inlet of the oil cooler through an integrated block.

The plunger pump station provided by the present invention realizes radial positioning of the reciprocating plunger pump and the frequency conversion integrated machine through the first stop and the second stop, thereby improving the centering efficiency and centering accuracy, simplifying the installation structure, and making assembly easier; the use of the frequency conversion integrated machine makes the plunger pump station smaller in size and suitable for underground mining working faces in coal mines. The frequency conversion integrated machine and the reciprocating plunger pump are connected and driven by a drum gear coupling, which allows a larger angular displacement, improves the contact conditions of the teeth, improves the ability to transmit torque, and extends the service life.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 is a schematic diagram of the overall structure of a plunger pump station provided by the present invention;

FIG2 is a schematic diagram of a gearbox structure provided by the present invention;

FIG3 is a schematic structural diagram of a frequency conversion integrated machine provided by the present invention;

FIG4 is a second schematic diagram of the gear box structure provided by the present invention;

FIG5 is a schematic diagram of the structure of a crankcase provided by the present invention;

FIG6 is a cross-sectional view of a drum gear coupling provided by the present invention;

FIG7 is a top view of the plunger pump station provided by the present invention;

FIG8 is a left side view of the plunger pump station provided by the present invention;

FIG. 9 is a schematic structural diagram of the base frame provided by the present invention.

Reference numerals:

100: reciprocating piston pump; 101: gear box; 102: crankcase; 103: hydraulic end; 104: chassis; 105: lubrication and cooling system; 110: first stop; 106: lubricating oil tank; 111: second stop; 112: third stop; 113: fourth stop; 130: drum gear coupling; 131: inner gear ring; 132: first outer gear flange; 133: second outer gear flange; 120: gear shaft; 121: output gear; 122: crankshaft; 200: frequency converter; 201: motor shaft; 140: oil cooler; 141: external lubrication assembly; 142: oil filter; 150: first mounting seat; 151: second mounting seat; 152: third mounting seat; 153: fourth mounting seat.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

The embodiments of the present invention are described below in conjunction with Figures 1 to 9. It should be understood that the following description is only an illustrative embodiment of the present invention and does not constitute a limitation on the present invention.

As shown in Figures 1 to 3, the present invention provides a plunger pump station, including: a reciprocating plunger pump 100, a frequency converter 200 and a drum gear coupling 130, the reciprocating plunger pump 100 includes a gear box 101, and the first end of the gear box 101 is provided with a first stop 110; the end face of the frequency converter 200 is provided with a second stop 111, and the first stop 110 and the second stop 111 are radially positioned and matched; one end of the drum gear coupling 130 is connected to the gear shaft 120 of the gear box 101, and the other end is connected to the motor shaft 201 of the frequency converter 200.

Specifically, the gearbox 101 and the frequency converter 200 are radially positioned by the first stop 110 and the second stop 111, and then connected by bolts. The first stop 110 and the second stop 111 improve the centering accuracy of the gearbox 101 and the frequency converter 200, and the installation is more convenient. Therefore, on the basis of high centering accuracy, the drum gear coupling 130 is set, which has stronger load-bearing capacity, large angular displacement supplement, reduced stress concentration, reduced noise, more convenient disassembly and assembly, and higher transmission efficiency.

Among them, for the first stop 110 and the second stop 111 of the present invention, as shown in Figures 2 and 3, the first stop 110 is a groove, and the second stop 111 is a boss. The boss is placed in the groove, and the outer diameter of the boss cooperates with the inner diameter of the groove for radial limiting.

With respect to the frequency converter 200 of the present invention, the frequency converter 200 is the power unit of the entire plunger pump station; the mine-use explosion-proof and intrinsically safe frequency converter and speed regulation integrated machine is an integrated product integrating a frequency converter, a motor, and electrical control, integrating explosion-proof technology, high power density motor design and manufacturing technology, power electronics technology, computer control technology, etc. The integrated design of the frequency converter and the motor and the high power density motor design technology greatly reduce the volume of the frequency converter 200, making it more adaptable to the use conditions of the narrow space of the underground mining working face in coal mines.

As for the drum gear coupling 130 of the present invention, the drum gear coupling 130 belongs to a rigid-flexible coupling. The bearing capacity of the drum gear coupling is strong. Under the same outer diameter of the inner gear sleeve and the maximum outer diameter of the coupling, the bearing capacity of the drum gear coupling 130 is increased by 15-20% on average compared with the straight gear coupling. The angular displacement compensation amount of the drum gear coupling is large. When the radial displacement is equal to zero, the allowable angular displacement of the drum gear coupling 130 is increased by about 50% compared with the straight gear coupling. Under the same module, number of teeth, and tooth width, the angular displacement allowed by the drum gear is larger than that of the straight gear. The drum-shaped tooth surface of the drum gear coupling improves the contact conditions of the inner and outer teeth, avoids the disadvantages of the extrusion of the edge of the straight tooth end under the angular displacement condition, and the stress concentration, and at the same time improves the friction and wear of the tooth surface, reduces the noise, and has a long maintenance cycle. The tooth end of the outer gear sleeve of the drum gear coupling is in a trumpet shape, which makes it very convenient to install and disassemble the inner and outer teeth. The transmission efficiency of the drum gear coupling is as high as 99.7%.

As shown in Figures 4 and 5, in one embodiment of the present invention, a third stop 112 is provided at the second end of the gear box 101; the reciprocating piston pump 100 also includes a crankcase 102, and a fourth stop 113 is provided on the end surface of the crankcase 102, and the third stop 112 and the fourth stop 113 are radially positioned and matched.

Specifically, the alignment accuracy of the crankcase 102 and the gearbox 101 is improved by the third stop 112 and the fourth stop 113, and radial positioning stops are processed at both ends of the gearbox 101, which reduces the assembly difficulty of the entire reciprocating piston pump 100 and improves the assembly accuracy.

With respect to the third stop 112 and the fourth stop 113 of the present invention, the third stop 112 is a boss, and the fourth stop 113 is a groove, the boss is placed in the groove, and the outer diameter of the boss cooperates with the inner diameter of the groove to perform radial positioning, thereby improving the centering accuracy of the gearbox 101 and the crankcase 102. Among them, the axial directions of the first stop 110 and the third stop 112 are parallel and do not overlap, that is, the connecting axis of the gearbox 101 and the frequency converter 200 is not colinear with the connecting axis of the gearbox 101 and the crankcase 102.

As shown in Figure 6, in some embodiments of the present invention, the drum gear coupling 130 includes: an inner gear ring 131, a first outer gear flange 132 and a second outer gear flange 133, the outer teeth of the first outer gear flange 132 are meshed with the inner teeth of the inner gear ring 131, and the first outer gear flange 132 is keyed to the gear shaft 120; the outer teeth of the second outer gear flange 133 are meshed with the inner teeth of the inner gear ring 131, and the second outer gear flange 133 is keyed to the motor shaft 201.

Specifically, the gear shaft 120 includes an external spline, the first external tooth flange 132 is spline-connected to the gear shaft 120 , the motor shaft 201 includes an external bar key, and the second external tooth flange 133 is bar-key-connected to the motor shaft 201 .

Continuing to refer to FIG. 1 , in other embodiments of the present invention, the reciprocating plunger pump 100 further includes a hydraulic end 103, which is placed on one side of the crankcase 102, and the crankcase 102 is connected to the hydraulic end 103. The crankcase 102 converts the rotational motion of the crankshaft 122 into the reciprocating motion of the crosshead connecting rod, the frequency conversion integrated machine 200 drives the gearbox 101 to rotate, the gearbox 101 drives the crankshaft 122 of the crankcase 102 to rotate, and the crankshaft 122 drives the hydraulic end 103 to do work. Specifically, the rotation of the crankshaft 122 drives the crosshead connecting rod and the plunger to reciprocate through the pull rod, and the reciprocating motion of the plunger in the liquid cylinder body causes the volume of the working chamber to change periodically, so that the mechanical energy of the frequency conversion integrated machine 200 is directly converted into pressure energy for conveying liquid through the reciprocating plunger pump 100.

Continuing to refer to FIG. 2 , in a specific embodiment of the present invention, the plunger pump station further includes a lubricating oil tank 106, which is placed below the gear box 101. The lubricating oil tank 106 is used to hold gear lubricating oil, and the lubricating oil tank 106 and the gear box 101 can be an integrated connected structure. The lubricating oil tank 106 is placed below the gear box 101, making the layout more reasonable and reducing the space occupied by the lubricating oil tank 106.

As shown in FIG. 7 , in other embodiments of the present invention, the gearbox 101 includes an output gear 121, the output gear 121 is meshed with the gear shaft 120, and the output gear 121 is key-connected with the crankshaft 122 of the crankcase 102. In other words, the frequency converter 200 drives the gear shaft 120 of the gearbox 101 to rotate, the gear shaft 120 is meshed with the output gear 121, and the output gear 121 is meshed with the crankshaft 122 of the crankcase 102 through internal and external spline engagement to transmit power.

As shown in FIG. 7 and FIG. 8 , in some optional embodiments of the present invention, the plunger pump station further includes a lubrication cooling system 105, which is disposed on one side of the reciprocating plunger pump 100, that is, on one side of the crankcase 102, and the other side of the crankcase 102 is the gearbox 101. The lubrication cooling system 105 includes an oil cooler 140, which is disposed below the crankcase 102. The occupied area of the oil cooler 140 is reduced.

Specifically, the oil cooler 140 is arranged along the length of the plunger pump station, that is, arranged longitudinally below the crankcase 102. The lubrication cooling system 105 is a system that provides lubricating oil to the crankshaft 122, bearings, gears and other moving parts, and circulates and cools the gear oil in the lubricating oil tank 106.

In addition, in other optional embodiments of the present invention, the lubrication and cooling system 105 also includes: a first tubular one-way valve and a second tubular one-way valve (not shown in the figure), one end of the first tubular one-way valve is connected to the built-in lubrication component; one end of the second tubular one-way valve is connected to the external lubrication component 141; wherein the first tubular one-way valve and the second tubular one-way valve are connected to the oil inlet of the oil cooler 140 through an integrated block.

Specifically, one end of the first tubular one-way valve is connected to the built-in lubrication assembly through a pipeline, and the other end is connected to the oil cooler 140 through an integrated block; one end of the second tubular one-way valve is connected to the external lubrication assembly 141 through a pipeline, and the other end is connected to the oil cooler 140 through an integrated block; and the first tubular one-way valve and the second tubular one-way valve are placed at the oil inlet of the oil cooler 140, making the layout more compact, reasonable, and easy to maintain.

In addition, the lubrication and cooling system 105 also includes an oil filter 142, which is arranged on the main line of the entire lubrication and cooling system 105, and the oil filter 142 is installed on one side of the crankcase 102, and is placed in the middle of one side of the crankcase 102, that is, placed in the upper and middle part of the lubrication and cooling system 105, shortening the overall width of the plunger pump station, making the layout of the lubrication and cooling system 105 more compact and reasonable, and the pipeline layout more standardized, which is convenient for maintenance.

As shown in FIG9 , in a specific embodiment of the present invention, the plunger pump station further includes a base frame 104, and the reciprocating plunger pump 100 and the frequency conversion integrated machine 200 are both mounted on the base frame 104. Specifically, the frequency conversion integrated machine 200, the gear box 101, the crankcase 102 and the hydraulic end 103 are all mounted on the base frame 104, wherein the gear box 101 is mounted on the base frame 104 via the lubricating oil tank 106.

In addition, the lubrication cooling system 105 is also installed on the base frame 104 and is placed at one end of the base frame 104 .

Further, in a specific embodiment of the present invention, the base frame 104 includes: a first mounting seat 150, a second mounting seat 151 and a third mounting seat 152, the first mounting seat 150 is used to mount the frequency conversion machine 200; the second mounting seat 151 is used to mount the gear box 101; the third mounting seat 152 is used to mount the crankcase 102, the third mounting seat 152 is arched, and the third mounting seat 152 is higher than the first mounting seat 150 and the second mounting seat 151; wherein the second mounting seat 151 is placed between the first mounting seat 150 and the third mounting seat 152. In other words, the frequency conversion machine 200, the gear box 101 and the crankcase 102 are sequentially mounted along the length direction of the base frame 104, and the frequency conversion machine 200, the gear box 101 and the crankcase 102 are connected to the base frame 104 by bolts.

Among them, the first mounting seat 150 is composed of a cross beam and a longitudinal beam, the second mounting seat 151 includes an integrally formed rectangular base with a threaded hole, the arched beam of the third mounting seat 152 lifts the crankcase 102, so that the crankshaft 122 of the crankcase 102 cooperates with the output gear 121 of the gear box 101 for transmission, and there is a gap between the arched beam of the third mounting seat 152 and the longitudinal beam on one side of the base frame 104, and the gap is used to install the oil cooler 140 of the lubrication cooling system 105, and the height of the oil cooler 140 is less than or equal to the height of the arched beam.

In addition, the chassis 104 further includes a fourth mounting seat 153, which is used to mount the external lubrication assembly 141, and the fourth mounting seat 153 is lower than the third mounting seat 152. That is, the frequency converter 200, the gearbox 101, the crankcase 102 and the lubrication and cooling system 105 are all mounted on the chassis 104.

The plunger pump station provided by the present invention realizes radial positioning of the reciprocating plunger pump 100 and the frequency converter 200 through the first stop 110 and the second stop 111, thereby improving the centering efficiency and centering accuracy, simplifying the installation structure, and making assembly easier; the use of the frequency converter 200 makes the plunger pump station smaller in size and suitable for underground mining working faces in coal mines. The frequency converter 200 and the reciprocating plunger pump 100 are connected and driven by a drum gear coupling 130, which allows a larger angular displacement, improves the contact conditions of the teeth, improves the ability to transmit torque, and extends the service life.

The plunger pump station of the present invention can be used in coal mining, downhole fracturing, oil cementing, and oil fracturing, such as an emulsion pump station, a spray pump station, a cementing pump group, and an oil fracturing pump group.

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 (10)

1. A plunger pump station, comprising:

The reciprocating plunger pump comprises a gear box, wherein a first end of the gear box is provided with a first spigot;

The variable frequency all-in-one machine is provided with a second spigot on the end face, and the first spigot and the second spigot are radially positioned and matched;

and one end of the crowned tooth coupler is connected with a gear shaft of the gear box, and the other end of the crowned tooth coupler is connected with a motor shaft of the frequency conversion integrated machine.

2. The plunger pump station of claim 1, wherein the second end of the gearbox is provided with a third spigot;

the reciprocating plunger pump further comprises a crank case, a fourth spigot is arranged on the end face of the crank case, and the third spigot is in radial positioning fit with the fourth spigot.

3. The plunger pump station of claim 1, wherein the crowned tooth coupling comprises:

An inner gear ring;

the outer teeth of the first outer tooth flange are meshed with the inner teeth of the inner gear ring, and the first outer tooth flange is connected with the gear shaft through a key;

the outer teeth of the second outer tooth flange are meshed with the inner teeth of the inner gear ring, and the second outer tooth flange is connected with the motor shaft through a key.

4. The plunger pump station of claim 2, wherein the reciprocating plunger pump further comprises a fluid end disposed on a side of the crankcase, the crankcase being coupled to the fluid end.

5. The plunger pump station of claim 2, further comprising a lubrication cooling system comprising an oil cooler disposed below the crankcase.

6. A plunger pump station according to any one of claims 2 to 5, further comprising a chassis on which the reciprocating plunger pump and the variable frequency all-in-one are mounted.

7. The plunger pump station of claim 6, wherein the chassis comprises:

The first installation seat is used for installing the frequency conversion all-in-one machine;

The second mounting seat is used for mounting the gear box;

the third installation seat is used for installing the crankcase, is arched and is higher than the first installation seat and the second installation seat;

Wherein the second mount is disposed between the first mount and the third mount.

8. The plunger pump station of claim 1, further comprising a lubrication tank disposed below the gearbox.

9. A plunger pump station according to claim 2, wherein the gearbox comprises an output gear, the output gear being in mesh with the gear shaft, the output gear being keyed to a crank shaft of the crankcase.

10. The plunger pump station of claim 5, wherein the lubrication and cooling system further comprises:

one end of the first tubular one-way valve is connected with the built-in lubrication assembly;

one end of the second tubular one-way valve is connected with the external lubrication assembly;

The first pipe type one-way valve and the second pipe type one-way valve are connected with an oil inlet of the oil cooler through an integrated block.