A large-flow high-pressure plunger pump sealing cavity integrated cooling and lubricating structure

Abstract

The utility model relates to a high pressure plunger pump of large flow, specifically a high pressure plunger pump of large flow sealing envelope body integrated cooling lubrication structure, including plunger, the one end of plunger is provided with adjusting nut, the utility model integrates the cooling and lubrication flow channel into integrated structure, makes lubricating oil have lubrication and cooling function, reduces independent loop and external pipeline, helps high pressure plunger pump modularization, miniaturization of large flow. The round angle transition resistance reduction is equipped in oil inlet and oil outlet, and the plunger side guide vane angle strengthens lubrication and local heat dissipation, six support columns design increases oil flow space, improves heat dissipation capacity. The cooling ring cavity is unevenly arranged according to the heating characteristics of sealing envelope body, the high pressure side spacing is small, the far high pressure side spacing is big, and the temperature field is balanced, and the temperature gradient is reduced. Through the integrated structure and guide flow shunting design, the temperature field and lubrication state of sealing area are stabilized, the heat attenuation and wear of packing are reduced, the sealing performance is improved, the service life of component, the operation efficiency and reliability of pump are prolonged.

Description

Technical Field

[0001] This utility model relates to a high-flow-rate, high-pressure plunger pump, specifically an integrated cooling and lubrication structure for the sealing body of a high-flow-rate, high-pressure plunger pump. Background Technology

[0002] High-flow, high-pressure plunger pumps are crucial equipment in fields such as oilfield water injection, chemical pressurization and transportation, coal chemical circulating water pressurization, and seawater desalination pretreatment. They typically operate under conditions of high pressure, large displacement, and long-term continuous operation. These pumps rely on the reciprocating motion of the plunger to achieve liquid intake and discharge. They offer stable output pressure and high efficiency, making them suitable for conveying high-head, highly corrosive, or solid-containing working fluids. With the rapid development of deep water injection in oilfields, the large-scale nature of chemical systems, and high-pressure transportation scenarios, the single-cylinder displacement and overall flow rate of pumps are continuously increasing. This significantly increases the mechanical and thermal loads borne by the plunger assembly, making the heat dissipation, lubrication, and sealing performance of the sealing gland a critical factor affecting the overall efficiency of the pump.

[0003] In high-flow, high-pressure plunger pumps, the plunger's sealing gland plays a crucial role in sealing the high-pressure medium, supporting and guiding the plunger, and limiting leakage. As pump flow and pressure ratings increase, frictional heat within the sealing gland, shear heat from the plunger's reciprocating motion, and heat conduction from the high-pressure medium all significantly raise the temperature in the sealing area, affecting the packing seal performance and structural lifespan. Existing plunger pump sealing glands often employ a single-channel lubrication structure or a simple annular cooling circuit for heat dissipation. However, this oil circuit coverage is limited, the cooling area is fixed, and it's difficult to adapt to temperature differences in different parts of the sealing assembly. Furthermore, cooling and lubrication systems are often separately arranged, resulting in complex oil circuits and increased volume, which is detrimental to pump compactness. In addition, lubricating oil relies primarily on its own diffusion for heat dissipation; the low flow velocity and unidirectional flow direction within the sealing cavity easily cause localized overheating, hardening, or ablation of the packing, leading to seal failure, increased leakage, and shortened maintenance cycles. Therefore, there is an urgent need for a sealing gland structure that can integrate lubrication and cooling within a limited space, and achieve uniform heat dissipation and improve the reliability of packing seals through reasonable flow channel design and oil guiding structure, so as to improve the overall efficiency of high-flow-rate high-pressure plunger pumps. Utility Model Content

[0004] To address the shortcomings of existing technologies, which may lead to material jamming on the conveyor rollers when dealing with different materials, this invention proposes an integrated cooling and lubrication structure for the sealing body of a high-flow, high-pressure plunger pump.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an integrated cooling and lubrication structure for a high-flow-rate, high-pressure plunger pump sealing body, including a plunger, an adjusting nut at one end of the plunger, a sealing body sleeved on the outside of the plunger, a cooling and lubrication integrated flow channel mechanism and a sealing mechanism on the sealing body, a second sealing ring between the plunger and the sealing body, and a first sealing ring on the sealing body; The cooling and lubrication integrated flow channel mechanism includes a main flow channel, which is located on the outside of the sealing box. Cooling and lubrication branch flow channels and cooling branch flow channels are respectively provided inside the sealing box. The main flow channel is connected to the cooling and lubrication branch flow channels and the cooling branch flow channels.

[0006] Preferably, the sealing mechanism includes an oil cooling ring, which is fixedly connected to the inner wall of the sealing chamber and contacts the plunger. A rear guide sleeve is provided on one side of the oil cooling ring. A first spacer ring and a second spacer ring are fixedly connected to the inner wall of the sealing chamber. A spring is provided inside the sealing chamber. A front guide sleeve is fixedly connected to one end of the spring, and a rear guide sleeve is fixedly connected to the other end of the spring. The oil cooling ring contacts the rear guide sleeve. A fifth packing and a sixth packing are respectively in contact on both sides of the oil cooling ring. The sixth packing is in contact with the rear guide sleeve. A second spacer ring is provided on the side of the fifth packing. A fourth packing is provided on one side of the second spacer ring. A third spacer ring is provided on one side of the fourth packing. A second packing is provided on one side of the third spacer ring. A first packing is provided on one side of the second packing. A front guide sleeve is provided on one side of the first packing. All sealing mechanisms are provided on the inner wall of the sealing chamber. The axial width of the first, second, third, fourth, fifth, and sixth packings is the same, which is b.

[0007] Preferably, the cooling branch channel includes a first cooling ring cavity disposed within a sealing chamber. A second cooling ring cavity is disposed on one side of the first cooling ring cavity, a third cooling ring cavity is disposed on one side of the second cooling ring cavity, a fourth cooling ring cavity is disposed on one side of the third cooling ring cavity, a fifth cooling ring cavity is disposed on one side of the fourth cooling ring cavity, a sixth cooling ring cavity is disposed on one side of the fifth cooling ring cavity, a seventh cooling ring cavity is disposed on one side of the sixth cooling ring cavity, an eighth cooling ring cavity is disposed on one side of the seventh cooling ring cavity, and a ninth cooling ring cavity is disposed on one side of the eighth cooling ring cavity.

[0008] Preferably, the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth cooling ring cavities have the same radius and b / 4 ≤ r < b / 2.

[0009] Preferably, the spacing between the first cooling ring cavity, the second cooling ring cavity, the third cooling ring cavity, the fourth cooling ring cavity, and the fifth cooling ring cavity is the same, d, and b / 2.

[0010] Preferably, the spacing between the fifth, sixth, seventh, eighth, and ninth cooling ring cavities is unequal. The spacing between the fifth and sixth cooling ring cavities is equal to d1 and b / 2 < d1 < 2b / 3; the spacing between the sixth and seventh cooling ring cavities is equal to d2 and d2 / 3 < d2 < 3b / 4; the spacing between the seventh and eighth cooling ring cavities is d3 and 5b / 6 < d3 < 11b / 12; and the spacing between the eighth and ninth cooling ring cavities is equal to d4 and b < d4 < 7b / 6.

[0011] Preferably, the oil cooling ring is provided with a first guide angle and a second guide angle. The angle between the plane containing the first guide angle and the second guide angle and the plunger should be between 10° and 80°. The first guide angle is greater than the second guide angle. Multiple support columns are provided between the oil cooling rings. The oil cooling rings are rounded near the oil inlet and oil outlet.

[0012] The advantages of this utility model are: This invention integrates cooling and lubrication channels into a single flow channel structure, allowing lubricating oil to simultaneously perform lubrication and cooling functions within the same system. This reduces the need for independent circuits, decreases the number of external pipelines, and results in a more compact overall structure. This facilitates modular and miniaturized design for high-flow, high-pressure plunger pumps. Rounded corners at the inlet and outlet reduce oil flow resistance and improve flow characteristics. A guide angle near the plunger guides the lubricating oil more effectively to the plunger contact area, enhancing lubrication and improving local heat dissipation efficiency. Furthermore, the six-support column structure increases the volume and flow space of the oil within the annular cavity, further improving overall heat dissipation. Based on the heating characteristics of different locations within the sealing chamber, the cooling annular cavities are non-uniformly arranged: the spacing between cavities near the high-pressure side is smaller to enhance cooling in high-heat areas, while the spacing between cavities further away from the high-pressure side is larger to maintain a balanced temperature distribution. This differentiated design effectively reduces the temperature gradient in the sealing area and improves the overall heat dissipation uniformity of the plunger assembly. Through an integrated cooling and lubrication structure and a reasonable flow guiding and splitting design, this invention can create a more stable temperature field and lubrication state inside the sealing chamber, reducing the thermal attenuation and wear of the packing. This improves sealing performance, extends the service life of the sealing components, and helps enhance the overall operating efficiency and reliability of the plunger pump under high pressure and high flow conditions. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the oil cooling ring in this utility model; Figure 4 This is a cross-sectional schematic diagram of the oil cooling ring in this utility model; Figure 5 This utility model Figure 4 Enlarged view of point A in the middle; Figure 6 This is a planar schematic diagram of the sealing box and cooling ring cavity of this utility model.

[0015] In the diagram: 1. Plunger; 2. Adjusting nut; 3. Sealing box; 4. Main flow channel; 5. Cooling and lubrication branch flow channel; 6. Cooling branch flow channel; 7. First sealing ring; 8. Second sealing ring; 9. Spring; 10. Front guide sleeve; 11. First packing; 12. Second packing; 13. First spacer ring; 14. Third packing; 15. Fourth packing; 16. Second spacer ring; 17. Fifth packing; 18. Oil cooling ring; 19. Sixth packing; 20. Rear guide sleeve; 21. First cooling ring cavity; 22. Second cooling ring cavity; 23. Third cooling ring cavity; 24. Fourth cooling ring cavity; 25. Fifth cooling ring cavity; 26. Sixth cooling ring cavity; 27. Seventh cooling ring cavity; 28. Eighth cooling ring cavity; 29. ​​Ninth cooling ring cavity; 30. First guide angle; 31. Second guide angle. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0017] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail. This application discloses an integrated cooling and lubrication structure for the sealing body of a high-flow, high-pressure plunger pump. (Refer to...) Figure 1and Figure 2 An integrated cooling and lubrication structure for a high-flow-rate, high-pressure plunger pump sealing body includes a plunger 1, an adjusting nut 2 at one end of the plunger 1, a sealing body 3 sleeved on the outside of the plunger 1, a cooling and lubrication integrated flow channel mechanism and a sealing mechanism on the sealing body 3, a second sealing ring 8 between the plunger 1 and the sealing body 3, and a first sealing ring 7 on the sealing body 3. The cooling and lubrication flow channel mechanism includes a main flow channel 4, which is located on the outside of the sealing box 3. Cooling and lubrication branch flow channels 5 and cooling branch flow channels 6 are respectively provided inside the sealing box 3. The main flow channel 4 is connected to the cooling and lubrication branch flow channels 5 and cooling branch flow channels 6.

[0018] Reference Figures 1-6The sealing mechanism includes an oil cooling ring 18, which is fixedly connected to the inner wall of the sealing chamber 3. The oil cooling ring 18 contacts the plunger 1. A rear guide sleeve 20 is provided on one side of the oil cooling ring 18. A first spacer ring 13 and a second spacer ring 16 are fixedly connected to the inner wall of the sealing chamber 3. A spring 9 is provided inside the sealing chamber 3. A front guide sleeve 10 is fixedly connected to one end of the spring 9, and a rear guide sleeve 20 is fixedly connected to the other end of the spring 9. The oil cooling ring 18 is in contact with the rear guide sleeve 20. A fifth packing 17 and a sixth packing 19 are respectively in contact on both sides of the oil cooling ring 18. The sixth packing 19 is in contact with the rear guide sleeve 20. A second spacer ring 16 is provided on the side of the fifth packing 17, and a fourth packing 15 is provided on one side of the second spacer ring 16. A third spacer ring is provided on one side, a second packing 12 is provided on one side of the third spacer ring, a first packing 11 is provided on one side of the second packing 12, and a front guide sleeve 10 is provided on one side of the first packing 11. All sealing structures are located on the inner wall of the sealing chamber 3. The axial widths of the first packing 11, second packing 12, third packing 14, fourth packing 15, fifth packing 17, and sixth packing 19 are all the same, b. The cooling branch channel 6 includes a first cooling ring cavity 21, which is located within the sealing chamber 3. A second cooling ring cavity 22 is provided on one side of the first cooling ring cavity 21, a third cooling ring cavity 23 is provided on one side of the second cooling ring cavity 22, and a fourth cooling ring cavity 24 is provided on one side of the third cooling ring cavity 23. A fifth cooling ring cavity 25 is provided. A sixth cooling ring cavity 26 is provided on one side of the fifth cooling ring cavity 25. A seventh cooling ring cavity 27 is provided on one side of the sixth cooling ring cavity 26. An eighth cooling ring cavity 28 is provided on one side of the seventh cooling ring cavity 27. A ninth cooling ring cavity 29 is provided on one side of the eighth cooling ring cavity 28. The radii of the first cooling ring cavity 21, the second cooling ring cavity 22, the third cooling ring cavity 23, the fourth cooling ring cavity 24, the fifth cooling ring cavity 25, the sixth cooling ring cavity 26, the seventh cooling ring cavity 27, the eighth cooling ring cavity 28, and the ninth cooling ring cavity 29 are the same and b / 4≤r<b / 2. The spacing between the first cooling ring cavity 21, the second cooling ring cavity 22, the third cooling ring cavity 23, the fourth cooling ring cavity 24, and the fifth cooling ring cavity 25 is... All have the same value d and b / 2. The spacing between the fifth cooling ring cavity 25, the sixth cooling ring cavity 26, the seventh cooling ring cavity 27, the eighth cooling ring cavity 28, and the ninth cooling ring cavity 29 is unequal. The spacing between the fifth cooling ring and the sixth cooling ring cavity 26 is equal to d1 and b / 2 < d1 < 2b / 3. The spacing between the sixth cooling ring cavity 26 and the seventh cooling ring cavity 27 is equal to d2 and d2 / 3 < d2 < 3b / 4. The spacing between the seventh cooling ring cavity 27 and the eighth cooling ring cavity 28 is d3 and 5b / 6 < d3 < 11b / 12. The spacing between the eighth cooling ring cavity 28 and the ninth cooling ring cavity 29 is equal to d4 and b < d4 < 7b / 6. Based on the different heat levels at different locations in the sealing box 3, the multiple cooling ring cavities are arranged non-uniformly.To maintain a uniform overall temperature field and thus improve the overall heat dissipation uniformity of plunger 1, the cooling and lubrication channels are integrated into a single flow channel structure. This allows the lubricating oil to simultaneously perform lubrication and cooling functions within the same flow channel system, reducing the need for independent circuits, decreasing the number of external pipelines, and making the overall structure more compact.

[0019] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The oil cooling ring 18 is provided with a first guide angle 30 and a second guide angle 31. The angle between the plane containing the first guide angle 30 and the second guide angle 31 and the plunger 1 needs to be between 10° and 80°. The first guide angle 30 is greater than the second guide angle 31. Multiple support pillars are provided between the oil cooling rings 18. The oil cooling ring 18 is rounded near the oil inlet and oil outlet. The design of the first guide angle 30 and the second guide angle 31 helps the lubricating oil to enter the contact area of ​​the plunger 1 more effectively, thereby enhancing the lubrication effect and improving the local heat dissipation efficiency. The oil cooling ring 18 includes multiple support pillars, which helps to increase the volume and flow space of the oil in the ring cavity, thereby improving the overall heat dissipation energy. The rounded corners of the oil cooling ring 18 near the oil inlet and oil outlet help to reduce the oil flow resistance.

[0020] Working principle: Lubrication enters the main channel 4 through pressure lubrication, part of which enters the oil cooling ring 18 through the cooling lubrication branch channel 5, and part of which enters the cooling ring cavity through the cooling branch channel 6. The lubricating oil entering the oil cooling ring 18 lubricates and dissipates heat from the plunger 1. The rounded corner design helps reduce oil flow resistance, and the support column design helps increase the volume and flow space of the oil in the ring cavity, thereby improving the overall heat dissipation. The design of the first guide angle 30 and the second guide angle 31 helps the lubricating oil enter the contact area of ​​the plunger 1 more effectively, thereby enhancing the lubrication effect and improving the local heat dissipation efficiency. The lubricating oil entering the multiple cooling ring cavities that are unevenly distributed dissipates heat evenly from the sealing body 3 to maintain the uniformity of the overall temperature field, thereby improving the overall heat dissipation uniformity of the plunger 1. Finally, the lubricating oil from the two branch channels is discharged through the bottom main channel 4. Through the integrated cooling and lubrication structure and reasonable guide and split design, a more stable temperature field and lubrication state can be formed inside the sealing body 3, reducing the thermal decay and wear of the packing. This can improve the sealing performance, extend the service life of the sealing components, and help improve the overall operating efficiency and reliability of the plunger pump under high pressure and high flow conditions.

[0021] In this embodiment, the range of the radial radius r of the cooling ring cavity and the range and position of the distances d, d1, d2, d3, and d4 between each cooling ring cavity are set to achieve the optimal dimensions for the technical effect of this invention. The basic principles, main features, and advantages of this invention have been shown and described above. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims of this invention.

Claims

1. An integrated cooling and lubrication structure for the sealing body of a high-flow-rate, high-pressure plunger pump, comprising a plunger (1), characterized in that: An adjusting nut (2) is provided at one end of the plunger (1), and a sealing box (3) is sleeved on the outside of the plunger (1). A cooling and lubrication flow channel mechanism and a sealing mechanism are provided on the sealing box (3). A second sealing ring (8) is provided between the plunger (1) and the sealing box (3), and a first sealing ring (7) is provided on the sealing box (3). The cooling and lubrication integrated flow channel mechanism includes a main flow channel (4), which is located on the outside of the sealing box (3). The sealing box (3) is provided with a cooling and lubrication branch flow channel (5) and a cooling branch flow channel (6). The main flow channel (4) is connected to the cooling and lubrication branch flow channel (5) and the cooling branch flow channel (6).

2. The integrated cooling and lubrication structure for the sealing body of a high-flow-rate, high-pressure plunger pump according to claim 1, characterized in that: The sealing mechanism includes an oil cooling ring (18), which is fixedly connected to the inner wall of the sealing box (3). The oil cooling ring (18) is in contact with the plunger (1). A rear guide sleeve (20) is provided on one side of the oil cooling ring (18). A first spacer ring (13) and a second spacer ring (16) are fixedly connected to the inner wall of the sealing box (3). A spring (9) is provided inside the sealing box (3). A front guide sleeve (10) is fixedly connected to one end of the spring (9). A rear guide sleeve (20) is fixedly connected to the other end of the spring (9). The oil cooling ring (18) is in contact with the rear guide sleeve (20). A fifth packing (17) and a sixth packing (19) are respectively in contact with both sides of the oil cooling ring (18). The sixth packing (19) contacts the rear guide sleeve (20). The fifth packing (17) has a second spacer ring (16) on its side. The second spacer ring (16) has a fourth packing (15) on one side. The fourth packing (15) has a third spacer ring on one side. The third spacer ring has a second packing (12) on one side. The second packing (12) has a first packing (11) on one side. The first packing (11) has a front guide sleeve (10) on one side. The sealing mechanism is located on the inner wall of the sealing box (3). The axial width of the first packing (11), the second packing (12), the third packing (14), the fourth packing (15), the fifth packing (17), and the sixth packing (19) is the same, which is b.

3. The integrated cooling and lubrication structure for the sealing body of a high-flow-rate, high-pressure plunger pump according to claim 1, characterized in that: The cooling branch channel (6) includes a first cooling ring cavity (21), which is disposed in a sealing box (3). A second cooling ring cavity (22) is disposed on one side of the first cooling ring cavity (21), a third cooling ring cavity (23) is disposed on one side of the second cooling ring cavity (22), a fourth cooling ring cavity (24) is disposed on one side of the third cooling ring cavity (23), a fifth cooling ring cavity (25) is disposed on one side of the fourth cooling ring cavity (24), a sixth cooling ring cavity (26) is disposed on one side of the fifth cooling ring cavity (25), a seventh cooling ring cavity (27) is disposed on one side of the sixth cooling ring cavity (26), an eighth cooling ring cavity (28) is disposed on one side of the seventh cooling ring cavity (27), and a ninth cooling ring cavity (29) is disposed on one side of the eighth cooling ring cavity (28).

4. The integrated cooling and lubrication structure for the sealing body of a high-flow-rate, high-pressure plunger pump according to claim 3, characterized in that: The first cooling ring cavity (21), the second cooling ring cavity (22), the third cooling ring cavity (23), the fourth cooling ring cavity (24), the fifth cooling ring cavity (25), the sixth cooling ring cavity (26), the seventh cooling ring cavity (27), the eighth cooling ring cavity (28), and the ninth cooling ring cavity (29) have the same radius and b / 4≤r<b / 2.

5. The integrated cooling and lubrication structure for the sealing body of a high-flow-rate, high-pressure plunger pump according to claim 3, characterized in that: The spacing between the first cooling ring cavity (21), the second cooling ring cavity (22), the third cooling ring cavity (23), the fourth cooling ring cavity (24), and the fifth cooling ring cavity (25) is the same, d, and b / 2.

6. The integrated cooling and lubrication structure for the sealing body of a high-flow-rate, high-pressure plunger pump according to claim 3, characterized in that: The spacing between the fifth cooling ring cavity (25), the sixth cooling ring cavity (26), the seventh cooling ring cavity (27), the eighth cooling ring cavity (28), and the ninth cooling ring cavity (29) is not equal. The spacing between the fifth cooling ring and the sixth cooling ring cavity (26) is equal to d1 and b / 2 < d1 < 2b / 3. The spacing between the sixth cooling ring cavity (26) and the seventh cooling ring cavity (27) is equal to d2 and d2 / 3 < d2 < 3b / 4. The spacing between the seventh cooling ring cavity (27) and the eighth cooling ring cavity (28) is d3 and 5b / 6 < d3 < 11b / 12. The spacing between the eighth cooling ring cavity (28) and the ninth cooling ring cavity (29) is equal to d4 and b < d4 < 7b / 6.

7. The integrated cooling and lubrication structure for the sealing body of a high-flow-rate, high-pressure plunger pump according to claim 2, characterized in that: The oil cooling ring (18) is provided with a first guide angle (30) and a second guide angle (31). The angle between the plane of the first guide angle (30) and the second guide angle (31) and the plunger (1) must be between 10° and 80°. The first guide angle (30) is greater than the second guide angle (31). Multiple support columns are provided between the oil cooling rings (18). The oil cooling rings (18) are rounded near the oil inlet and oil outlet.

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