Downclocking and anti-attrition reciprocating high-pressure plunger pump

Abstract

The invention belongs to the field of oilfield exploitation equipment, particularly relates to a frequency-reducing and anti-attrition reciprocating high-pressure plunger pump, and aims to solve the problems that mechanical abrasion is aggravated and abrasion mechanism qualitative change is caused due to double tests of bearing high-frequency friction and insufficient lubrication between a piston rod and a guide structure during long-time water injection in the prior art; and finally abnormal wear is generated. According to the frequency-reducing and abrasion-reducing type reciprocating high-pressure plunger pump, the multiple parallel plunger units are alternately driven through the crankshaft so that the flow can be equally divided, and the working frequency of the single unit can be reduced; meanwhile, the oil spoon is arranged on the connecting rod, the oil spoon moves along with the connecting rod to splash lubricating oil into the crankcase, and continuous lubrication on moving parts is achieved. Through the mode of combining frequency reduction and load shedding with enhanced lubrication, abrasion aggravation and abrasion mechanism qualitative change are effectively slowed down, the problem of abnormal abrasion is avoided, and the service life of equipment is remarkably prolonged.

Description

Technical Field

[0001] This invention belongs to the field of oilfield extraction equipment, and specifically relates to a frequency-reducing and wear-reducing reciprocating high-pressure plunger pump. Background Technology

[0002] Water injection is a common development method in oilfield exploitation. The principle is to inject water into the oil well to increase the internal pressure, thereby promoting crude oil flow and improving production efficiency. When injecting water into underground oil wells, a frequency-reducing and friction-reducing reciprocating high-pressure plunger pump is typically used. However, in the current use of frequency-reducing and friction-reducing reciprocating high-pressure plunger pumps for underground water injection, the repeated high-frequency friction between the piston and guide structure due to the need for prolonged underground water injection not only exacerbates mechanical wear but also causes localized changes in material properties due to frictional heat. This leads to a qualitative change in the wear mechanism, resulting in abnormal wear and affecting the plunger pump's lifespan and water injection efficiency.

[0003] Existing reciprocating high-pressure plunger pumps suffer from the problem that during prolonged water injection, the piston rod and guide structure are subjected to the dual challenges of high-frequency friction and insufficient lubrication, leading to increased mechanical wear and a qualitative change in the wear mechanism, ultimately resulting in abnormal wear. Summary of the Invention

[0004] To address the aforementioned problems in existing technologies, namely the accelerated mechanical wear and subsequent qualitative changes in the wear mechanism caused by the combined effects of high-frequency friction and insufficient lubrication on the piston rod and guide structure during prolonged water injection in existing reciprocating high-pressure plunger pumps, this invention provides a frequency-reducing and wear-reducing reciprocating high-pressure plunger pump, comprising:

[0005] The housing and plunger pump power assembly include a housing with an outlet pipe, an inlet pipe, and multiple first channels. The housing also forms a crankcase, and the bottom of the crankcase forms an oil reservoir for containing lubricating oil. The plunger pump power assembly includes multiple plunger units with connecting rods, a crankshaft, and multiple oil scoops. The crankshaft is rotatably mounted on the crankcase. One end of each plunger unit is connected to the outlet pipe and the inlet pipe through one of the first channels, and the other end is hinged to the crankshaft and powered by the connecting rod. The hinge points of each plunger unit and the crankshaft are distributed at equal phase angles about the rotation axis of the crankshaft. Each oil scoop is located at one end of the connecting rod hinged to the crankshaft and is configured to periodically immerse in and strike the lubricating oil in the oil reservoir when the crankshaft rotates, so as to splash the lubricating oil into the crankcase.

[0006] Specifically, the plunger unit further includes a sleeve and a plunger body. The sleeve is mounted on the housing and communicates with the first channel. The plunger body slides on the sleeve and is hinged to the crankshaft via the connecting rod.

[0007] Specifically, it also includes an auxiliary guiding assembly. The plunger body includes a piston, a shaft, and a rubber plug. One end of the shaft is hinged to the connecting rod, and the other end is connected to the piston. The rubber plug is sleeved on the piston and inserted into the sleeve. The auxiliary guiding assembly is coaxially mounted on the end of the sleeve away from the first channel and is sleeved on the shaft. Ball bearings roll along the inner wall of the auxiliary guiding assembly, and these ball bearings roll around the outer circumference of the shaft. The combination of the rubber plug and the auxiliary guiding assembly guides the plunger body as it slides along the sleeve.

[0008] Specifically, the auxiliary guiding assembly further includes a base and a cover. The base has an annular groove on its outer periphery, and multiple radial grooves communicating with the annular groove are evenly distributed around its own axis. The cover is engaged with the annular groove to seal the outer openings of each radial groove, and the ball bearings are installed at the inner openings of each radial groove and roll against the shaft.

[0009] Specifically, the auxiliary guide assembly further includes an elastic frame, which is mounted in the radial groove and located between the ball and the housing. The elastic frame includes a connecting block, a spring, and a retainer. The connecting block abuts against the housing, the ball rolls within the retainer, and the spring is mounted in a compressed state between the connecting block and the retainer. The spring force provides pressure from the ball against the shaft.

[0010] Specifically, the outer casing includes a front cover, a main housing, and bolts connected in sequence. The water outlet pipe, the water inlet pipe, and the first channel are all located in the front cover. The bolts penetrate the front cover and are threadedly connected to the main housing.

[0011] Specifically, a protruding plate is provided at one end of the main housing near the front cover. The front cover includes a front plate, a guide tube, and a connecting post. One end of the guide tube is connected to the front plate, and the other end extends toward the protruding plate. The connecting post is used to stabilize the guide tube. The inner diameter of the guide tube is larger than that of the bolt. The bolt passes through the front plate, the guide tube, and is threadedly connected to the protruding plate in sequence. The guide tube is used to straighten the bolt and reduce alignment difficulties caused by the distal end of the bolt sagging.

[0012] Specifically, it also includes a cooling component, which comprises an inlet pipe, a solenoid valve, a water level sensor, and a temperature sensor. The main housing forms a liquid storage chamber around the sleeve and is filled with cooling medium. The inlet pipe is located in the main housing and communicates with the liquid storage chamber. The solenoid valve is located at the lower end of the main housing and communicates with the liquid storage chamber to control the discharge of the cooling medium. The water level sensor and the temperature sensor are located within the liquid storage chamber and are used to detect the liquid level and temperature of the cooling medium, respectively.

[0013] Specifically, the housing further includes a first check valve and a second check valve. The first check valve and the second check valve are installed on both sides of the first channel, and are respectively located between the sleeve and the outlet pipe and between the sleeve and the inlet pipe. The first check valve is used to restrict the flow of medium from the outlet pipe to the sleeve. The second check valve is used to restrict the flow of medium from the sleeve to the inlet pipe.

[0014] Specifically, the outer casing also includes screw plugs, with two screw plugs respectively sealing both ends of the first channel.

[0015] The beneficial effects that this invention can achieve by combining the above solutions are as follows:

[0016] This invention provides a frequency-reducing and wear-reducing reciprocating high-pressure plunger pump, comprising:

[0017] The housing and plunger pump power assembly include a housing with an outlet pipe, an inlet pipe, and multiple first channels. The housing also forms a crankcase, and the bottom of the crankcase forms an oil reservoir for containing lubricating oil. The plunger pump power assembly includes multiple plunger units with connecting rods, a crankshaft, and multiple oil scoops. The crankshaft is rotatably mounted on the crankcase. One end of each plunger unit is connected to the outlet pipe and the inlet pipe through one of the first channels, and the other end is hinged to the crankshaft and powered by the connecting rod. The hinge points of each plunger unit and the crankshaft are distributed at equal phase angles about the rotation axis of the crankshaft. Each oil scoop is located at one end of the connecting rod hinged to the crankshaft and is configured to periodically immerse in and strike the lubricating oil in the oil reservoir when the crankshaft rotates, so as to splash the lubricating oil into the crankcase.

[0018] In practical applications, multiple first channels are simultaneously connected to the outlet pipe and the inlet pipe. The crankshaft alternately drives multiple plunger units, spaced at equal intervals, to pump liquid in and out from one of the first channels. Simultaneously, as the crankshaft rotates, the oil scoop periodically dips into and strikes the lubricating oil in the oil reservoir, splashing the lubricating oil to various parts of the crankcase, providing continuous and sufficient lubrication for the crankshaft and the plunger units and other moving parts. By evenly distributing the pumping load without reducing the total pumping volume, the operating frequency of a single plunger unit is significantly reduced. Combined with the aforementioned sufficient lubrication, this effectively mitigates the increased mechanical wear and changes in wear mechanism caused by continuous high-frequency friction, thereby preventing abnormal wear problems.

[0019] As can be seen, compared with existing technologies, this frequency-reducing and friction-reducing reciprocating high-pressure plunger pump alternately drives multiple parallel plunger units through the crankshaft, while simultaneously using the oil scoop to perform splash lubrication on the inside of the crankcase. This combination of frequency reduction and load reduction with enhanced lubrication significantly slows down the mechanical wear aggravation and wear mechanism changes caused by continuous high-frequency friction, thereby avoiding abnormal wear problems. It overcomes the problem of existing reciprocating high-pressure plunger pumps where prolonged water injection causes the piston rod and guide structure to endure the dual challenges of high-frequency friction and insufficient lubrication, leading to increased mechanical wear and changes in the wear mechanism, ultimately resulting in abnormal wear. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the frequency-reducing and wear-reducing reciprocating high-pressure plunger pump provided in an embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the cross-sectional structure of a frequency-reducing and wear-reducing reciprocating high-pressure plunger pump. Figure 1 ;

[0023] Figure 3 Schematic diagram of the cross-sectional structure of a frequency-reducing and wear-reducing reciprocating high-pressure plunger pump. Figure 2 ;

[0024] Figure 4 A cross-sectional structural diagram of the auxiliary guide component;

[0025] Figure 5 for Figure 3 A magnified schematic diagram of the partial structure at point A in the middle;

[0026] Figure 6 This is a cross-sectional view of the guide tube.

[0027] icon:

[0028] 100. Outer casing; 110. Outlet pipe; 120. Inlet pipe; 130. Front cover; 101. First channel; 131. Front plate; 132. Guide tube; 133. Connecting column; 140. Main housing; 102. Crankcase; 103. Liquid reservoir; 141. Protruding plate; 150. Bolt; 160. First check valve; 170. Second check valve; 180. Plug;

[0029] 200. Plunger pump power assembly; 210. Plunger unit; 211. Connecting rod; 212. Sleeve; 213. Plunger body; 2131. Piston; 2132. Shaft; 2133. Rubber stopper; 220. Crankshaft; 230. Oil spoon;

[0030] 300, Auxiliary guide assembly; 310, Ball bearing; 320, Base; 301, Electrode; 330, Cover; 331, First cover plate; 332, Second cover plate; 340, Elastic frame; 341, Connecting block; 342, Spring; 343, Retainer; 350, Base;

[0031] 400 Cooling component; 410 Liquid inlet pipe; 420 Solenoid valve; 430 Water level sensor; 440 Temperature sensor; 450 Cover. Detailed Implementation

[0032] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] This invention provides a frequency-reducing and wear-reducing reciprocating high-pressure plunger pump, comprising:

[0035] The housing 100 and the plunger pump power assembly 200 are provided. The housing 100 is provided with an outlet pipe 110, an inlet pipe 120, and multiple first channels 101. The housing 100 also forms a crankcase 102, and the bottom of the crankcase 102 forms an oil reservoir for containing lubricating oil. The plunger pump power assembly 200 includes multiple plunger units 210 including connecting rods 211, a crankshaft 220, and multiple oil scoops 230. The crankshaft 220 is rotatably mounted on the crankcase 102. Each plunger unit 210 has one end connected to a first channel 230. Channel 101 is connected to outlet pipe 110 and inlet pipe 120, and the other end is hinged to crankshaft 220 via connecting rod 211 and powered; the hinge points of each plunger unit 210 and crankshaft 220 are distributed with the same phase angle about the rotation axis of crankshaft 220; each oil spoon 230 is respectively provided at one end of connecting rod 211 hinged to crankshaft 220, and is configured to periodically immerse and strike the lubricating oil in the oil reservoir when crankshaft 220 rotates, so as to splash the lubricating oil into crankcase 102.

[0036] In summary, the frequency-reducing and wear-reducing reciprocating high-pressure plunger pump provided by this invention can achieve the following technical effects:

[0037] This frequency-reducing and friction-reducing reciprocating high-pressure plunger pump uses a crankshaft 220 to alternately drive multiple parallel plunger units 210, while simultaneously using an oil scoop 230 to splash lubricate the inside of the crankcase 102. This combination of frequency reduction and load reduction with enhanced lubrication significantly slows down the mechanical wear aggravation and wear mechanism changes caused by continuous high-frequency friction, thus avoiding abnormal wear problems. It overcomes the problem of existing reciprocating high-pressure plunger pumps where prolonged water injection causes the piston rod and guide structure to endure both high-frequency friction and insufficient lubrication, leading to increased mechanical wear and changes in the wear mechanism, ultimately resulting in abnormal wear.

[0038] The following combination Figures 1 to 6 The structure and shape of the frequency-reducing and wear-reducing reciprocating high-pressure plunger pump provided in this embodiment are described in detail below:

[0039] Specifically, regarding how the oil ladle 230 works:

[0040] The concave oil-scooping surface of the oil ladle 230 faces the direction of motion of the connecting rod 211 as it rotates with the crankshaft 220. When the crankshaft 220 drives the connecting rod 211, the oil ladle 230 will be immersed in the integrally formed oil storage area at the bottom of the crankcase 102 at the lowest point of its motion trajectory, thereby scooping up the lubricating oil and efficiently splashing it into the entire crankcase, providing continuous and sufficient splash lubrication for moving parts such as the crankshaft 220 and the connecting rod 211.

[0041] Preferably, to achieve efficient return and collection of lubricating oil and ensure long-term reliable lubrication of the plunger pump power assembly 200, the oil reservoir is also equipped with a guide structure. The guide structure can be configured as a chamfer or slope at the bottom edge of the oil reservoir, which allows the lubricating oil flowing down from the inner wall of the crankcase 102 after lubrication to automatically collect under the preset impact path of the oil spoon 230 by gravity.

[0042] Regarding the structural composition of the plunger unit 210, specifically:

[0043] In this embodiment, the plunger unit 210 further includes a sleeve 212 and a plunger body 213. The sleeve 212 is mounted on the housing 100 and communicates with the first channel 101. The plunger body 213 slides on the sleeve 212 and is hinged to the crankshaft 220 via connecting rods 211. The hinge points of each connecting rod 211 and the crankshaft 220 are distributed with equal phase angles about the rotation axis of the crankshaft 220.

[0044] In this embodiment, the frequency-reducing and wear-reducing reciprocating high-pressure plunger pump further includes an auxiliary guide assembly 300. The plunger body 213 includes a piston 2131, a shaft 2132, and a rubber plug 2133. One end of the shaft 2132 is hinged to a connecting rod 211, and the other end is connected to the piston 2131. The rubber plug 2133 is sleeved on the piston 2131 and inserted into a sleeve 212. The auxiliary guide assembly 300 is coaxially mounted on the sleeve 212 at the end away from the first channel 101 and sleeved on the shaft 2132. Ball bearings 310 roll along the inner wall of the auxiliary guide assembly 300, and these ball bearings 310 roll around the outer circumference of the shaft 2132. The rubber plug 2133 can reduce clearance, buffer shock absorption, and compensate for clearance changes. The combination of the rubber plug 2133 and the auxiliary guide assembly 300 guides the sliding of the plunger body 213 along the sleeve 212 to enhance the radial stability of the plunger body 213.

[0045] Regarding the structural composition of the auxiliary guidance component 300, specifically:

[0046] The auxiliary guide assembly 300 also includes a base 320, a cover 330, and a base 350. The base 320 has an annular groove on its outer periphery and multiple radial grooves evenly distributed around its own axis, communicating with the annular groove. The base 350 is mounted on the outer casing 100 and located at the end of the sleeve 212 away from the first channel 101. The base 320 is provided with tabs 301, and the base 320 is bolted to the base 350 via the tabs 301. The cover 330 includes a semi-annular first cover plate 331 and a second cover plate 332. The first cover plate 331 and the second cover plate 332 form an annular shape and are fixedly engaged with the annular groove by screws, sealing the outer openings of each radial groove. Ball bearings 310 are installed at the inner openings of each radial groove and roll against the shaft 2132. The rolling connection between the ball bearings 310 and the shaft 2132 reduces friction and wear, thereby improving service life.

[0047] To ensure stable pressure exerted by the ball bearing 310 on the shaft 2132, in this embodiment, the auxiliary guide assembly 300 further includes an elastic frame 340. The elastic frame 340 is mounted in the radial groove and located between the ball bearing 310 and the housing 330. The elastic frame 340 includes a connecting block 341, a spring 342, and a retainer 343. The connecting block 341 abuts against the housing 330, the ball bearing 310 rolls in the retainer 343, and the spring 342 is mounted in a compressed state between the connecting block 341 and the retainer 343. The elastic force of the spring 342 is used to provide pressure from the ball bearing 310 on the shaft 2132.

[0048] Regarding the structural composition of the outer casing 100, specifically:

[0049] The outer casing 100 includes a front cover 130, a main casing 140, and bolts 150 connected in sequence. The water outlet pipe 110, the water inlet pipe 120, and the first channel 101 are all located in the front cover 130. The bolts 150 penetrate the front cover 130 and are threadedly connected to the main casing 140. The front cover 130 has chamfered edges, and the edge of the protruding plate 141 of the main casing 140 has a corresponding mating groove. The front cover 130 and the main casing 140 are positioned by fitting the chamfered edges of the front cover 130 with the mating grooves of the protruding plate 141, facilitating installation.

[0050] To avoid operational difficulties caused by the excessively long bolt 150 dangling at its distal end, making it difficult to align the threaded holes, in this embodiment, a protruding plate 141 is provided on the main housing 140 near the front cover 130. The front cover 130 includes a front plate 131, a guide tube 132, and a connecting post 133. One end of the guide tube 132 is connected to the front plate 131, and the other end extends towards the protruding plate 141. The connecting post 133 is used to stabilize the guide tube 132. The inner diameter of the guide tube 132 is larger than that of the bolt 150. The bolt 150 passes through the front plate 131 and the guide tube 132 in sequence and is threadedly connected to the protruding plate 141. The guide tube 132 is used to straighten the bolt 150, reducing alignment difficulties caused by the distal end of the bolt 150 dangling. The sleeve 212 penetrates the protruding plate 141 and communicates with the first channel 101.

[0051] In this embodiment, the frequency-reducing and friction-reducing reciprocating high-pressure plunger pump further includes a cooling assembly 400, which includes an inlet pipe 410, a solenoid valve 420, a water level sensor 430, a temperature sensor 440, and a cover 450. The main housing 140 forms a liquid storage chamber 103 around the sleeve 212, which is filled with cooling medium. The inlet pipe 410 is located in the main housing 140 and communicates with the liquid storage chamber 103. The cover 450 is screwed on and seals the inlet pipe 410. A solenoid valve 420 is located at the lower end of the main housing 140 and communicates with the liquid storage chamber 103 to control the discharge of the cooling medium. The water level sensor 430 and the temperature sensor 440 are located in the liquid storage chamber 103 and are used to detect the liquid level and temperature of the cooling medium, respectively. The cooling medium is water. The heat generated between the three pistons 2131 and the sleeve 212 is conducted through the cool water. The temperature of the water inside the liquid storage chamber 103 is known through the temperature sensor 440. The solenoid valve 420 is opened to facilitate the replacement of the cooling water. At the same time, the water that has absorbed heat and heated up can be used by workers to wash up in winter.

[0052] In this embodiment, the outer casing 100 further includes a first one-way valve 160 and a second one-way valve 170. The first one-way valve 160 and the second one-way valve 170 are installed on both sides of the first channel 101, and are respectively located between the sleeve 212 and the outlet pipe 110, and between the sleeve 212 and the inlet pipe 120. The first one-way valve 160 is used to restrict the flow of medium from the outlet pipe 110 to the sleeve 212. The second one-way valve 170 is used to restrict the flow of medium from the sleeve 212 to the inlet pipe 120.

[0053] In this embodiment, the outer casing 100 also includes screw plugs 180, with two screw plugs 180 respectively sealing the two ends of the first channel 101.

[0054] In summary, the specific working process of the frequency-reducing and wear-reducing reciprocating high-pressure plunger pump provided in this embodiment is as follows:

[0055] The crankshaft 220 alternately drives multiple plunger units 210 spaced at equal intervals via connecting rods 211, which pump liquid in and out of their respective first channels 101. By distributing the total pumped water volume equally among the multiple plunger units 210, the operating frequency of each individual plunger unit is reduced, mitigating the increased mechanical wear and qualitative changes in the wear mechanism caused by continuous high-frequency friction, thereby avoiding abnormal wear problems.

[0056] During the movement of the crankshaft 220 driving the connecting rod 211, the oil scoop 230 fixed to the large end of the connecting rod 211 moves accordingly, periodically immersing itself in the oil reservoir at the bottom of the crankcase at the lowest point of its trajectory. This scoops up lubricating oil and splashes it throughout the crankcase, providing lubrication for all moving parts, including the crankshaft 220, connecting rod 211, and plunger guide area. Simultaneously, to ensure the smooth movement of the plunger body 213, the ball bearings 310 in the auxiliary guide assembly 300 form a rolling connection with the shaft 2132 to reduce friction; the rubber stopper 2133 reduces clearance and provides cushioning and shock absorption. Together, they precisely guide the plunger body 213 as it slides along the sleeve 212. Furthermore, the cooling assembly 400 continuously absorbs the frictional heat generated by the plunger unit 210 and other components through the cooling water in the reservoir 103, limiting the overall temperature rise, restricting heat accumulation, and preventing parts from experiencing shortened service life due to thermal fatigue.

[0057] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.

[0058] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0059] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A frequency-reducing and wear-reducing reciprocating high-pressure plunger pump, characterized in that, include: The housing (100) and the plunger pump power assembly (200) are provided with an outlet pipe (110) and an inlet pipe (120) and a plurality of first channels (101). The housing (100) also forms a crankcase (102), and the bottom of the crankcase (102) forms an oil reservoir for containing lubricating oil. The plunger pump power assembly (200) includes multiple plunger units (210) including connecting rods (211), a crankshaft (220) and multiple oil scoops (230). The crankshaft (220) is rotatably mounted on the crankcase (102). One end of each plunger unit (210) is connected to the water outlet pipe (110) and the water inlet pipe (120) through a first channel (101), and the other end is hinged to the crankshaft (220) through the connecting rods (211) and powered. The hinge points of each of the plunger units (210) and the crankshaft (220) are distributed at equal phase angles about the rotation axis of the crankshaft (220); Each of the oil scoops (230) is respectively disposed at one end of the connecting rod (211) hinged to the crankshaft (220) and is configured to periodically immerse and strike the lubricating oil in the oil storage area when the crankshaft (220) rotates, so as to splash the lubricating oil into the crankcase (102).

2. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 1, characterized in that: The plunger unit (210) also includes a sleeve (212) and a plunger body (213); The sleeve (212) is installed on the outer shell (100) and communicates with the first channel (101); The plunger body (213) slides on the sleeve (212) and is hinged to the crankshaft (220) via the connecting rod (211).

3. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 2, characterized in that: It also includes auxiliary guidance components (300); The plunger body (213) includes a piston (2131), a shaft (2132) and a rubber stopper (2133). One end of the shaft (2132) is hinged to the connecting rod (211), and the other end is connected to the piston (2131). The rubber stopper (2133) is sleeved on the piston (2131) and inserted into the sleeve (212). The auxiliary guide assembly (300) is coaxially mounted on the sleeve (212) at the end away from the first channel (101) and sleeved on the shaft (2132). The inner wall of the auxiliary guide assembly (300) is covered with rolling balls (310), which roll around the outer periphery of the shaft (2132); The combination of the rubber stopper (2133) and the auxiliary guide assembly (300) is used to guide the sliding of the plunger body (213) along the sleeve (212).

4. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 3, characterized in that: The auxiliary guide assembly (300) also includes a base (320) and a housing (330). The base (320) has an annular groove on its outer periphery, and the base (320) has a plurality of radial grooves that communicate with the annular groove evenly distributed around its own axis; The cover (330) is engaged with the annular groove to block the outer end opening of each of the radial grooves. The ball (310) is installed in the inner end opening of each of the radial grooves and rolls against the shaft (2132).

5. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 4, characterized in that: The auxiliary guide assembly (300) also includes an elastic frame (340) which is mounted in the radial groove and located between the ball (310) and the housing (330); The elastic frame (340) includes a connecting block (341), a spring (342), and a retainer (343). The connecting block (341) abuts against the cover (330), the ball (310) rolls on the retainer (343), and the spring (342) is installed between the connecting block (341) and the retainer (343) in a compressed state; The spring force (342) is used to provide pressure of the ball (310) on the shaft (2132).

6. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 2, characterized in that: The outer casing (100) includes a front cover (130), a main casing (140), and bolts (150) connected in sequence. The water outlet pipe (110), the water inlet pipe (120), and the first channel (101) are all located on the front cover (130). The bolt (150) penetrates the front cover (130) and is threaded into the main housing (140).

7. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 6, characterized in that: A protrusion (141) is provided on one end of the main housing (140) near the front cover (130). The front cover (130) includes a front plate (131), a guide tube (132) and a connecting post (133). One end of the guide tube (132) is connected to the front plate (131), and the other end extends toward the protruding plate (141). The connecting post (133) is used to stabilize the guide tube (132). The inner diameter of the guide tube (132) is larger than that of the bolt (150), and the bolt (150) passes through the front plate (131) and the guide tube (132) in sequence and is threaded to the convex plate (141); The guide tube (132) is used to straighten the bolt (150) and reduce the alignment difficulties caused by the drooping of the distal end of the bolt (150).

8. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 2, characterized in that: It also includes a cooling assembly (400), which includes an inlet pipe (410), a solenoid valve (420), a water level sensor (430), and a temperature sensor (440). The outer casing (100) forms a liquid reservoir (103) around the plunger unit (210) and is filled with a cooling medium; The liquid inlet pipe (410) is opened in the outer shell (100) and communicates with the liquid storage chamber (103); The lower end of the outer casing (100) is provided with the solenoid valve (420), which is connected to the liquid storage chamber (103) and is used to control the discharge of the cooling medium; The water level sensor (430) and the temperature sensor (440) are disposed in the liquid storage chamber (103) and are used to detect the liquid level and temperature of the cooling medium, respectively.

9. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 2, characterized in that: The housing (100) also includes a first check valve (160) and a second check valve (170); The first check valve (160) and the second check valve (170) are installed on both sides of the first channel (101), and are respectively located between the sleeve (212) and the outlet pipe (110) and between the sleeve (212) and the inlet pipe (120); The first check valve (160) is used to restrict the flow of medium from the outlet pipe (110) to the sleeve (212); The second check valve (170) is used to restrict the flow of medium from the sleeve (212) to the inlet pipe (120).

10. The frequency-reducing and wear-reducing reciprocating high-pressure plunger pump according to claim 1, characterized in that: The outer casing (100) also includes screw plugs (180), with two screw plugs (180) respectively sealing both ends of the first channel (101).

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