Vertical plunger pump with guiding and self-cleaning functions

Abstract

The vertical plunger pump with the guiding and self-cleaning functions comprises a planetary speed reducing mechanism, a crankshaft, a connecting rod mechanism and a plunger, the connecting rod mechanism comprises a connecting rod, one end of the connecting rod is arranged in a rotating disc through a first fixing pin, the other end of the connecting rod is connected with a sliding block through a second fixing pin, and the sliding block is in clearance fit in a plurality of elastic diaphragms; the elastic diaphragms are matched with the guide sleeve, the guide sleeve is fixed to the pump head body, and the adjusting piece is rotatably arranged on the pump head body. The elastic diaphragm comprises a sheet body, corrugation structures are evenly arranged on the sheet body in the circumferential direction, corrugation is provided with crest faces, trough faces are further arranged between the adjacent corrugation structures, the guiding precision and stability can be remarkably improved by arranging the guiding block and the elastic diaphragm, the coaxiality of the plunger is smaller than 0.01 mm, and the service life of the plunger is prolonged. And the problems of clamping stagnation and howling do not exist during high-speed reciprocating motion. And the length-diameter ratio formed by each group of elastic membranes in the axial direction is equivalently multiplied.

Description

A vertical plunger pump with guiding and self-cleaning functions Technical Field

[0001] This invention relates to the field of [field name], and more particularly to a vertical plunger pump with guiding and self-cleaning functions. Background Technology

[0002] A plunger pump is a positive displacement pump that uses the reciprocating motion of a plunger within a cylinder to change the volume of the sealed working chamber, thereby achieving liquid suction and discharge. Due to its advantages such as high pressure, compact structure, high efficiency, and convenient flow rate adjustment, it is widely used in industrial fields.

[0003] In existing technologies, the performance and lifespan of piston pumps are primarily limited by the reliability of their key friction pairs. These friction pairs are subjected to high-frequency reciprocating motion, high lateral forces, and harsh lubrication conditions during operation, making them prone to problems such as wear, seizing, and leakage.

[0004] Currently, the problems of guiding and lubrication of friction pairs in traditional plunger pumps cannot be fundamentally solved. Specifically, the following are the manifestations: (i) The plunger and the connecting seat adopt a rigid fit. This fit is difficult to compensate for machining and assembly errors. When subjected to overturning torque, it is easy to produce uneven wear, which leads to a rapid decrease in coaxiality, an increase in leakage, and an increase in vibration and noise, affecting the volumetric efficiency and service life of the pump.

[0005] (ii) Traditional rigid fitting makes it difficult for the plunger to maintain a stable hydrodynamic lubrication film during high-speed reciprocating motion, often resulting in boundary lubrication or mixed lubrication, leading to high friction coefficient, high energy consumption, and high temperature. Furthermore, localized high temperatures can cause material annealing and lubrication medium failure, accelerating the wear process.

[0006] (iii) During the reciprocating motion, metal abrasive particles and contaminants such as gum and carbon deposits generated by oil oxidation will remain at the friction interface, causing the lubricating oil to lose its lubricating properties and thus block the flow channel. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the purpose of this invention is to provide a vertical plunger pump with guiding and self-cleaning functions to solve one or more problems in the prior art.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: a vertical plunger pump with guiding and self-cleaning functions, comprising a planetary reduction mechanism, a crankshaft, a connecting rod mechanism, and a plunger. The output end of the planetary reduction mechanism is connected to the input end of the crankshaft. The output end of the crankshaft is connected to the input ends of multiple connecting rod mechanisms via a turntable. The output end of each connecting rod mechanism is connected to the plunger. The connecting rod mechanism includes a connecting rod. One end of the connecting rod is disposed in the turntable via a first fixing pin. The other end of the connecting rod is connected to a slider via a second fixing pin. The slider is fitted with multiple elastic diaphragms with clearance. Each elastic diaphragm is fitted with a guide sleeve. The guide sleeve is fixed to the pump head body. An adjusting element is rotatably disposed in the pump head body. Each elastic diaphragm includes a thin sheet body. The thin sheet body has a corrugated structure evenly arranged circumferentially. The corrugations have crests and troughs between adjacent corrugated structures. The height difference between the crests and troughs is 0.8–1.2 mm.

[0009] Furthermore, the corrugated structure has 8 to 20 wave numbers, and the thickness of the sheet body is 0.3 mm to 0.5 mm.

[0010] Furthermore, a fitting gap of 0.01 to 0.02 mm is formed between the elastic diaphragm and the outer diameter of the slider.

[0011] As claimed in claim 1, a vertical plunger pump with guiding and self-cleaning functions, wherein the corrugations of the corrugated structure are either sinusoidal waves or trapezoidal waves.

[0012] Furthermore, multiple micro oil storage tanks are formed on the trough surface. Each micro oil storage tank includes a main tank, which is arranged along the axial direction of the trough surface. The main tank also has branch tanks that are connected to the main tank and extend obliquely toward both sides of the main tank.

[0013] Furthermore, the interval between each of the aforementioned support grooves is 3 to 5 mm.

[0014] Furthermore, the width of the main groove is 0.8–1 mm, and the depth is 0.06–0.08 mm.

[0015] Furthermore, the width of the support groove is 0.3 to 0.4 mm, the depth is 0.04 to 0.05 mm, and the angle formed between the support groove and the extension direction of the main groove is 30° to 45°.

[0016] Furthermore, the planetary reduction mechanism includes a ring gear, planetary gears, and a planet carrier. The planetary gears are disposed on the planetary shaft of the planet carrier, and the planetary gears mesh with the inner side of the ring gear and with the sun gear. The sun gear is connected to the sun shaft.

[0017] Compared with existing technologies, the beneficial technical effects of this invention are as follows: By setting guide blocks and elastic diaphragms, the guiding accuracy and stability can be significantly improved, the plunger coaxiality is <0.01mm, and there are no jamming or squealing problems during high-speed reciprocating motion. The aspect ratio of each set of elastic diaphragms in the axial direction is effectively doubled, increasing the guiding ratio to 3.2. When the plunger reciprocating motion generates an overturning moment, each set of elastic diaphragms adaptively adjusts the contact pressure distribution through elastic deformation, concentrating the single-point stress of overturning into a uniformly distributed radial force and multi-point distributed load, reducing the stress peak by 60%-70%. Furthermore, due to the damping characteristics of the elastic diaphragm itself, it can absorb high-frequency impacts, and the misaligned corrugated arrangement can disrupt the coherence of vibration transmission, reducing the broadband vibration amplitude and lowering the overall noise to 5-8dB.

[0018] When the plunger reciprocates at low speed, it rubs against the lubricant at the edge of the micro-oil reservoir, rapidly forming a low-shear-strength transfer film on the contact surface. When the plunger moves at medium to high speed, it "drags" the surface lubricant into the inclined support groove, which acts like a miniature inclined thrust bearing, generating strong local dynamic pressure that pushes the friction surfaces apart and forms a stable oil film of 5–8 μm, further reducing the coefficient of friction to 0.03–0.05, allowing it to enter a full-film lubrication state. When the emulsion flows through the aforementioned micro-oil reservoir, it forms a unidirectional scouring flow within the support groove, periodically renewing the emulsion and preventing carbon and oxide deposits. This actively removes abrasive particles, preventing emulsion degradation and extending its lifespan. Attached Figure Description

[0019] Figure 1 shows a top view of a vertical plunger pump with guiding and self-cleaning functions according to an embodiment of the present invention.

[0020] Figure 2 shows a front view of a vertical plunger pump with guiding and self-cleaning functions according to an embodiment of the present invention.

[0021] Figure 3 shows a schematic diagram of the guide sleeve in a vertical plunger pump with guiding and self-cleaning functions according to an embodiment of the present invention.

[0022] Figure 4 shows a schematic diagram of the structure of the elastic diaphragm in a vertical plunger pump with guiding and self-cleaning functions according to an embodiment of the present invention.

[0023] Figure 5 shows a partial structural schematic diagram of the elastic diaphragm in a vertical plunger pump with guiding and self-cleaning functions according to an embodiment of the present invention.

[0024] The following are labels in the attached diagram: 1. Bracket; 2. Sun shaft; 3. Gear ring; 4. Planetary gear; 5. Planet carrier; 6. Crankshaft; 7. Bearing; 8. Turntable; 9. Connecting rod; 10. First fixing pin; 11. Second fixing pin; 12. Slider; 13. Guide sleeve; 1300. Oil hole; 14. Plunger; 15. Guide block; 16. Sealing ring; 17. Pump head body; 18. Adjusting component; 19. Sun gear; 20. Inlet valve core; 2001. Inlet; 21. Outlet valve core; 2101. Outlet; 22. Liquid chamber; 23. Elastic diaphragm; 2300. Thin sheet body; 2301. Corrugated structure; 2302. Corrugated crest surface; 2303. Corrugated trough surface; 2304. Main groove; 2305. Support groove. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the following detailed description of a vertical plunger pump with guiding and self-cleaning functions, in conjunction with the accompanying drawings and specific embodiments, is provided. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the purpose of the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0026] Please refer to Figures 1 and 2. A vertical piston pump with guiding and self-cleaning functions includes a planetary reduction mechanism, a crankshaft 6, a connecting rod mechanism, and a piston 14. The output end of the planetary reduction mechanism is connected to the input end of the crankshaft 6. The output end of the crankshaft 6 is connected to the input ends of multiple connecting rod mechanisms through a turntable 8. The output end of the connecting rod mechanism is connected to the piston 14.

[0027] Further, referring to Figures 1 and 2, the linkage mechanism includes connecting rods 9. One end of each connecting rod 9 is mounted inside the turntable 8 via a first fixing pin 10. A rod hole is provided on the first fixing pin 10 for the connecting rod 9 to pass through, and the connecting rod 9 is fixed by a pin after passing through the first fixing pin 10. Similarly, the other end of the connecting rod 9 is connected to the slider 12 via a second fixing pin 11. The second fixing pin 11 is fitted vertically inside the slider 12, and a hole is provided on the second fixing pin 11 for the connecting rod 9 to engage. As shown in Figure 3, the slider 12 is fitted with multiple elastic diaphragms 23, each elastic diaphragm 23 is fitted with a guide sleeve 13, the guide sleeve 13 is fixed to the pump head body 17, and the adjusting member 18 is rotatably mounted on the pump head body 17. An oil hole 1300 is also provided on the radial direction of the guide sleeve 13.

[0028] Specifically, a fitting clearance of 0.01 to 0.02 mm is formed between the elastic diaphragm 23 and the outer diameter of the slider 12. The outer diameter of the elastic diaphragm 23 is 0.03 to 0.05 mm larger than the inner diameter of the mounting groove of the guide block 15. The guide block 15 is heated to thermal expansion, and then the elastic diaphragm 23 is cooled to -50 to -70°C. The elastic diaphragm 23 is then quickly installed into the mounting groove of the guide block 15, and an interference fit is achieved by utilizing the temperature difference.

[0029] Please refer to Figures 3 and 4. The elastic diaphragm includes an annular sheet body 2300, on which a corrugated structure 2301 is uniformly arranged circumferentially. The elastic diaphragm is preferably made of 65Mn spring steel, which has a high elastic limit and good fatigue strength.

[0030] Further, please continue to refer to Figures 3 and 4. The thin sheet body 2300 is uniformly arranged with corrugated structures 2301 in the circumference. The corrugations of the corrugated structures 2301 are either sinusoidal waves or trapezoidal waves. The corrugations have crest surfaces 2302 and trough surfaces 2303 between adjacent corrugated structures 2301. The height difference between the crest surfaces 2302 and trough surfaces 2303 is 0.8 to 1.2 mm. The number of corrugated structures 2301 is 8 to 20, and the thickness of the thin sheet body 2300 is 0.3 mm to 0.5 mm.

[0031] By setting guide blocks 15 and elastic diaphragms, the guiding accuracy and stability can be significantly improved. The coaxiality of the plunger is <0.01mm, and there are no jamming or squealing problems during high-speed reciprocating motion. The aspect ratio of each set of elastic diaphragms in the axial direction is effectively doubled, increasing the guiding ratio to 3.2. When the reciprocating motion of the plunger 14 generates an overturning moment, each set of elastic diaphragms adaptively adjusts the contact pressure distribution through elastic deformation, concentrating the single-point stress of overturning into a uniformly distributed radial force and multi-point distributed load, reducing the stress peak by 60%-70%. Furthermore, due to the damping characteristics of the elastic diaphragm itself, it can absorb high-frequency impacts, and the misaligned corrugated arrangement can disrupt the coherence of vibration transmission, reducing the broadband vibration amplitude and lowering the overall noise to 5-8dB(A).

[0032] Further, referring to Figures 3 and 4, multiple micro-oil storage tanks are formed on the trough surface 2303. Each micro-oil storage tank includes a main tank 2304, which is axially arranged along the trough surface 2303. The main tank 2304 also has branch tanks 2305 that communicate with it and extend obliquely towards both sides of the main tank 2304. The branch tanks 2305 are spaced 3–5 mm apart. The main tank has a width of 0.8–1 mm and a depth of 0.06–0.08 mm. The branch tanks have a width of 0.3–0.4 mm and a depth of 0.04–0.05 mm. The angle formed between the branch tanks 2305 and the extending direction of the main tank 2304 is 30°–45°.

[0033] When the plunger reciprocates at low speed, it rubs against the lubricant at the edge of the micro-oil reservoir, rapidly forming a low-shear-strength transfer film on the contact surface. When the plunger moves at medium to high speed, it "drags" the surface lubricant into the inclined support groove 2305, which acts like a tiny inclined thrust bearing, generating strong local dynamic pressure that pushes the friction surfaces apart and forms a stable oil film of 5–8 μm, further reducing the coefficient of friction to 0.03–0.05, allowing it to enter a full-film lubrication state. When the emulsion flows through the aforementioned micro-oil reservoir, it forms a unidirectional scouring flow within the support groove 2305, periodically renewing the emulsion in the groove, preventing carbon and oxide deposits, and actively discharging abrasive particles to avoid emulsion deterioration and improve emulsion life.

[0034] Further, referring to Figures 1 and 2, the planetary reduction mechanism includes a ring gear 3, planetary gears 4, and a planet carrier 5. The planetary gears 4 are mounted on the planetary shaft of the planet carrier 5 and mesh with the inner side of the ring gear 3. A bracket 1 is connected to the upper part of the ring gear 3. Each planetary gear 4 meshes with a sun gear 19, which is connected to the sun shaft 2. The bottom of each planetary gear 4 is also connected to the planet carrier 5, which is connected to the input end of the crankshaft 6. Specifically, an external power source transmits power to the sun gear 19 via the sun shaft 2. The sun gear 19 meshes with each planetary gear 4, while the portion of each planetary gear 4 not meshing with the sun gear 19 meshes with the inner side of the ring gear 3. When the sun gear 19 drives the planetary gears 4 to rotate, since the ring gear 3 is fixed, the planetary gears 4 rotate along the inner wall of the stationary ring gear 3 while rotating on their own axis. This, in turn, drives the planet carrier 5 to rotate around its central axis via the planetary shaft. Because the planet carrier 5 is connected to the input end of the crankshaft 6, the speed provided by the motor is reduced from 1500 r / s to 375 r / s. The input and output ends of the crankshaft 6 are connected to bearings 7, which are both located on the pump head body 17. The crankshaft 6 drives the connecting rods 9, which in turn drive the slider 12 to reciprocate. Since the slider 12 is connected to the plunger 14, the plunger 14 moves within the liquid chamber 22, converting mechanical energy into hydraulic energy, thus achieving liquid output and input. Referring to Figures 1 and 2, inlet valve cores 20 and outlet valve cores 21, communicating with the liquid chamber 22, are also provided on the left and right sides of the pump head body 17. The inlet valve core 20 has an inlet port 2001, and the outlet valve core 21 has an outlet port 2101. Liquid is introduced through the inlet port 2001 and discharged through the outlet port 2101. By rotating the adjusting member 18, the pressure applied to the sealing ring 16 can be adjusted, thereby regulating the tightness of the sealing ring 16 and ensuring sealing performance.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A vertical plunger pump with guiding and self-cleaning functions, characterized in that: The system includes a planetary reduction gear mechanism, a crankshaft, a connecting rod mechanism, and a plunger. The output end of the planetary reduction gear mechanism is connected to the input end of the crankshaft. The output end of the crankshaft is connected to the input ends of multiple connecting rod mechanisms via a turntable. The output ends of the connecting rod mechanisms are connected to the plunger. Each connecting rod mechanism includes a connecting rod. One end of the connecting rod is fixed in the turntable via a first fixing pin, and the other end of the connecting rod is connected to a slider via a second fixing pin. The slider is fitted with multiple elastic diaphragms with clearance. Each elastic diaphragm is fitted with a guide sleeve, which is fixed to the pump head body. An adjusting element is rotatably mounted on the pump head body. Each elastic diaphragm includes a thin sheet body with a corrugated structure evenly arranged circumferentially. The corrugations have crests and troughs between adjacent corrugations. The height difference between the crests and troughs is 0.8–1.2 mm.

2. A vertical plunger pump with guiding and self-cleaning functions as claimed in claim 1, characterized in that: The corrugated structure has 8 to 20 wave numbers, and the thickness of the sheet body is 0.3 mm to 0.5 mm.

3. A vertical plunger pump with guiding and self-cleaning functions as claimed in claim 1, characterized in that: A clearance of 0.01 to 0.02 mm is formed between the elastic diaphragm and the outer diameter of the slider.

4. A vertical plunger pump with guiding and self-cleaning functions as claimed in claim 1, characterized in that: The ripples of the corrugated structure can be either sine waves or trapezoidal waves.

5. A vertical plunger pump with guiding and self-cleaning functions as claimed in claim 1, characterized in that: Multiple micro oil storage tanks are formed on the trough surface. Each micro oil storage tank includes a main tank, which is arranged along the axial direction of the trough surface. The main tank also has branch tanks that are connected to the main tank and extend obliquely toward both sides of the main tank.

6. A vertical plunger pump with guiding and self-cleaning functions as described in claim 5, characterized in that: The spacing between each of the aforementioned support grooves is 3-5 mm.

7. A vertical plunger pump with guiding and self-cleaning functions as described in claim 5, characterized in that: The width of the main groove is 0.8–1 mm, and the depth is 0.06–0.08 mm.

8. A vertical plunger pump with guiding and self-cleaning functions as described in claim 5, characterized in that: The width of the support groove is 0.3 to 0.4 mm, the depth is 0.04 to 0.05 mm, and the angle between the support groove and the extension direction of the main groove is 30° to 45°.

9. A vertical plunger pump with guiding and self-cleaning functions as claimed in claim 1, characterized in that: The planetary reduction mechanism includes a ring gear, planetary gears, and a planet carrier. The planetary gears are disposed on the planet shafts of the planet carrier, and the planetary gears mesh with the inner side of the ring gear and with the sun gear. The sun gear is connected to the sun shaft.

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