Self-compensation type wear-resistant sealing structure of plunger assembly of high-pressure plunger pump

Abstract

The invention belongs to the technical field of plunger sealing of high-pressure plunger pumps, and particularly relates to a high-pressure plunger pump plunger assembly self-compensation type abrasion-resistant sealing structure which comprises a high-pressure plunger pump body and an oil suction and outlet tank, the right end of the high-pressure plunger pump body is connected with the oil suction and outlet tank, and a fixing assembly is detachably installed at the right end of the interior of the high-pressure plunger pump body. And the right end of the fixing assembly communicates with the left end of the inner wall of the oil suction and outlet tank, a first sealing structure is detachably installed at the right end of the interior of the fixing assembly, and the high-pressure plunger pump main body is used for driving the first sealing structure to conduct fine opening and closing operation. The friction coefficient of the sealing structure is reduced, and the friction heat conductivity coefficient of the plunger assembly is reduced, so that the wear resistance of the sealing structure is improved, material aging caused by temperature rise is prevented, multiple times of self-compensation can be conducted on a wear gap, and then the durability of the sealing structure is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plunger seals for high-pressure piston pumps, and specifically to a self-compensating wear-resistant seal structure for the plunger assembly of a high-pressure piston pump. Background Technique

[0002] The clearance seal of the existing plunger assembly seal structure depends on the machining accuracy, and the clearance cannot be restored after wear; the seal ring seal relies on interference fit, and the elastic attenuation after wear leads to leakage; moreover, elastic seals such as O-rings are easily squeezed into the clearance and torn under high pressure. At the same time, the contact friction between the seal structure and the plug column easily causes temperature rise and material aging.

[0003] Therefore, we propose a self-compensating wear-resistant seal structure for the plunger assembly of a high-pressure piston pump. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides the following technical solutions:

[0005] A self-compensating wear-resistant seal structure for the plunger assembly of a high-pressure piston pump, which includes: a high-pressure piston pump main body and an oil suction and discharge tank;

[0006] The right end of the high-pressure piston pump main body is connected to the oil suction and discharge tank. A fixing component is detachably installed at the right end inside the high-pressure piston pump main body. The right end of the fixing component is communicated with the left end inner wall of the oil suction and discharge tank. A first sealing structure is detachably installed at the right end inside the fixing component. Driven by the high-pressure piston pump main body, it is used to drive the first sealing structure to perform a fine opening and closing operation. A second sealing structure is detachably installed at the left end of the first sealing structure. Driven by the high-pressure piston pump main body, it is used to drive the second sealing structure to perform a peristaltic operation. A third sealing structure is detachably installed at the left end of the second sealing structure. Through the cooperation of the drive of the high-pressure piston pump main body and the second sealing structure, the oil inside and outside the second sealing structure enters the third sealing structure, so that the oil fills and expands the left end of the third sealing structure, and performs non-contact pressure self-tightening sealing on the outer wall of the plug column.

[0007] As a preferred scheme of the self-compensating wear-resistant seal structure for the plunger assembly of the high-pressure piston pump described in the present invention, among them: the high-pressure piston pump main body includes: a high-pressure piston pump box body;

[0008] The high-pressure piston pump box body is placed on the ground. Side plates are detachably installed at the front end and the rear end of the high-pressure piston pump box body. A rotating shaft is connected between the two side plates. The outer wall of the rotating shaft is connected to the plunger assembly. The left end of the plunger assembly is connected to the rotating shaft through an eccentric wheel. A first limiting frame is detachably installed in the middle inside the high-pressure piston pump box body. The outer wall of the plunger assembly is slidably connected to the middle inside the first limiting frame. The right end of the first limiting frame is connected to a second limiting frame, and a fixing component is installed inside the second limiting frame.

[0009] As a preferred embodiment of the self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump described in the present invention, wherein: the fixed assembly includes: a semi-cylindrical barrel;

[0010] Two sets of semi-cylindrical barrels are provided, and the two sets of semi-cylindrical barrels are connected and installed by bolts. The two sets of semi-cylindrical barrels are installed inside the second limiting frame at the right end inside the high-pressure plunger pump body. The outer wall of the semi-cylindrical barrel is provided with a fixing plate, and the inner wall of the semi-cylindrical barrel is provided with a fixing groove.

[0011] As a preferred embodiment of the self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump described in the present invention, wherein: the first sealing structure includes: a first outer sealing assembly;

[0012] The first outer sealing assembly is installed at the right end inside the semi-cylindrical barrel, and an opening and closing assembly is installed around the inner wall of the first outer sealing assembly.

[0013] As a preferred embodiment of the self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump described in the present invention, wherein: the first outer sealing assembly includes: a first mounting ring;

[0014] The first mounting ring is installed at the right end inside the semi-cylindrical barrel. Grooves are provided around the inner wall of the first mounting ring. The left end of the first mounting ring is connected to the first outer sealing cylinder. Blocks are provided around the inner wall of the first outer sealing cylinder. An opening and closing assembly is installed between the two blocks. The left end of the first outer sealing cylinder is connected to a second mounting ring;

[0015] The opening and closing assembly includes: an opening and closing flap;

[0016] The left end of the opening and closing flap is movably connected to the inner wall of the second mounting ring. A folding strip is provided at the top of the right end of the opening and closing flap, and the folding strip is installed inside the groove. The middle of the opening and closing flap is placed between the two blocks. A fitting piece is provided at the bottom of the left end of the opening and closing flap, and the bottom of the fitting piece contacts the outer wall of the plunger assembly. First diversion grooves are provided at the bottoms of both the opening and closing flap and the fitting piece.

[0017] As a preferred embodiment of the self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump described in the present invention, wherein: the second sealing structure includes: a second outer sealing cylinder;

[0018] The right end of the second outer sealing cylinder is connected to the left end of the first sealing structure. Limiting components are installed at both ends of the inner wall of the second outer sealing cylinder. The first peristaltic component and the second peristaltic component are connected between the limiting components. The first peristaltic component and the second peristaltic component are connected to each other. Both the first peristaltic component and the second peristaltic component are provided in several groups.

[0019] As a preferred embodiment of the self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump described in the present invention, wherein: the limiting components include: a first limiting ring and a second limiting ring;

[0020] The first limiting ring is installed on the right end of the inner wall of the second outer sealing cylinder, the left end of the first limiting ring is connected to the second peristaltic assembly, the second limiting ring is installed on the left end of the inner wall of the second outer sealing cylinder, the right end of the second limiting ring is connected to the first peristaltic assembly, and the surface of the second limiting ring is provided with drainage grooves around;

[0021] The first peristaltic assembly includes: a V-ring;

[0022] The left end of the V-ring is connected to the right end of the second limiting ring, the right end of the V-ring is connected to the spacer ring, the right end of the spacer ring is connected to the second peristaltic assembly, the top and bottom of the V-ring are provided with through holes, and the inner wall of the spacer ring is provided with a second guide groove.

[0023] As a preferred solution of the self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump described in the present invention, the third sealing structure includes: a second outer sealing assembly;

[0024] The right end of the second outer sealing component is connected to the left end of the second sealing structure, and the left end of the second outer sealing component is installed at the inner left end of the fixed component. The right end of the inner wall of the second outer sealing component is connected to the spiral discharge component, and the left end of the spiral discharge component is connected to the filling component, and the filling component is installed at the left end of the inner wall of the second outer sealing component.

[0025] As a preferred solution of the self-compensating wear-resistant sealing structure of the high-pressure plunger pump plunger assembly of the present invention, the second outer sealing assembly includes: a third outer sealing cylinder;

[0026] The right end of the third outer sealing cylinder is connected to the left end of the second sealing structure, and the left end of the third outer sealing cylinder is installed at the inner left end of the fixed assembly. The inner side of the third outer sealing cylinder is provided with an outer cavity layer cylinder, and the left end of the inner wall of the outer cavity layer cylinder is provided with a mounting groove, and the surface of the mounting groove is provided with one-way valve holes around it.

[0027] The spiral discharge assembly includes: an outer discharge cylinder;

[0028] The outer row cylinder is installed at the inner right end of the third outer sealing cylinder, and spiral grooves are arranged around the inner wall of the outer row cylinder.

[0029] As a preferred solution of the self-compensating wear-resistant sealing structure of the high-pressure plunger pump plunger assembly of the present invention, the filling assembly includes: an isolation sealing ring;

[0030] The isolation sealing ring is installed inside the installation groove. A liquid storage tank is provided inside the isolation sealing ring. The right end of the isolation sealing ring is connected with an external discharge pipe. The right end of the external discharge pipe is connected to the left end of the outer wall of the external discharge tube. The left side of the external discharge pipe is connected to the liquid storage tank, and the right side of the external discharge pipe is connected to the spiral groove.

[0031] Compared with existing technologies:

[0032] Through the active cooperation of the first sealing structure with the plunger assembly, oil can be introduced into the interior, and the oil can be introduced into the interior of the second sealing structure through the interior of the first sealing structure, so that the oil adheres to the outer wall of the plunger assembly and the inner walls of the first and second sealing structures, thereby changing the sealing surface contact form from dry friction to fluid lubrication, reducing the friction coefficient of the sealing structure, reducing the friction heat conduction coefficient of the plunger assembly, increasing the wear resistance of the sealing structure, and preventing material aging caused by temperature rise. At the same time, the first sealing structure adopts a petal shape, and actively introduces the oil into the second sealing structure, rather than relying on passive gap oil leakage. Even if the initial gap is slightly larger due to processing errors, the oil can be supplemented through the pump suction effect of the petal opening and closing to fill the gap generated by wear, thereby realizing primary wear self-compensation;

[0033] Through the active cooperation of the second sealing structure with the plunger assembly, the oil can enter the interiors of the first peristaltic assembly and the second peristaltic assembly, and is squeezed through the through holes at the top and bottom for storage between the second outer sealing cylinder and the first and second peristaltic assemblies to form an oil buffer zone. When the gap increases due to wear of the plunger sealing surface, the high-pressure oil stored in the outer layer can backfill the gap to inhibit leakage, thereby realizing secondary wear self-compensation;

[0034] Through the active cooperation of the third sealing structure with the plunger assembly, the oil fills and expands the left end of the third sealing structure 6, and performs non-contact pressure self-tightening sealing on the outer wall of the plug column, avoiding the hard extrusion wear of the traditional sealing ring, eliminating the risk of extrusion breakage, and being able to prevent backflow, thereby realizing tertiary wear self-compensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure provided by the present invention;

[0036] Figure 2 It is a schematic diagram of the overall disassembled structure provided by the present invention;

[0037] Figure 3 It is a schematic diagram of the disassembled structure of the high-pressure plunger pump main body provided by the present invention;

[0038] Figure 4 It is a schematic diagram of the connection structure of the second limiting frame provided by the present invention;

[0039] Figure 5 It is a schematic diagram of the disassembled structure of the second limiting frame and the fixing component provided by the present invention;

[0040] Figure 6 It is a schematic diagram of the internal structure of the fixing component provided by the present invention;

[0041] Figure 7 It is a schematic diagram of the disassembled structure of the fixing component provided by the present invention;

[0042] Figure 8 Schematic diagram of the split structures of the first sealing structure, the second sealing structure and the third sealing structure provided by the present invention;

[0043] Figure 9 Schematic diagram of the split structure of the first sealing structure provided by the present invention;

[0044] Figure 10 Schematic diagram of the structure of the first outer sealing assembly provided by the present invention;

[0045] Figure 11 Schematic diagram of the structure of the opening and closing assembly provided by the present invention Figure 1 ;

[0046] Figure 12 Schematic diagram of the structure of the opening and closing assembly provided by the present invention Figure 2 ;

[0047] Figure 13 Schematic diagram of the split structure of the second sealing structure provided by the present invention;

[0048] Figure 14 Schematic diagram of the connection structure of the limiting assembly provided by the present invention;

[0049] Figure 15 Schematic diagram of the structure of the first peristaltic assembly provided by the present invention;

[0050] Figure 16 Schematic diagram of the structure of the third sealing structure provided by the present invention;

[0051] Figure 17 Schematic diagram of the split structure of the third sealing structure provided by the present invention;

[0052] Figure 18 Schematic diagram of the structure of the second outer sealing assembly provided by the present invention;

[0053] Figure 19 Schematic diagram of the structure of the spiral discharge assembly provided by the present invention;

[0054] Figure 20 Schematic diagram of the structure of the filling assembly provided by the present invention Figure 1 ;

[0055] Figure 21 Schematic diagram of the structure of the filling assembly provided by the present invention Figure 2 ;

[0056] Figure 22 Schematic diagram of the connection structure between the spiral discharge assembly and the filling assembly provided by the present invention.

[0057] In the figure:

[0058] High-pressure plunger pump main body 1, high-pressure plunger pump box body 11, side plate 12, rotating shaft 13, plunger assembly 14, first limit frame 15, second limit frame 16, oil suction and discharge oil tank 2, fixing assembly 3, semi-cylindrical barrel 31, fixing plate 32, fixing groove 33, first sealing structure 4, first outer sealing assembly 41, first mounting ring 411, groove 412, first outer sealing cylinder 413, stop block 414, second mounting ring 415, opening and closing assembly 42, opening and closing flap 421, folding strip 422, fitting piece 423, first diversion groove 424, second sealing structure 5, second outer sealing cylinder 51, limiting assembly 52, first limiting ring 521, second limiting ring 522, drain groove 523, first peristaltic assembly 53, V-ring 531, spacer ring 532, through hole 533, second diversion groove 534, second peristaltic assembly 54, third sealing structure 6, second outer sealing assembly 61, third outer sealing cylinder 611, outer cavity layer cylinder 612, mounting groove 613, one-way valve orifice 614, spiral discharge assembly 62, outer discharge cylinder 621, spiral groove 622, filling assembly 63, isolation sealing ring 631, liquid storage tank 632, outer discharge pipe 633. Detailed implementation mode

[0059] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will further describe the implementation modes of the present invention in detail in conjunction with the accompanying drawings.

[0060] The present invention provides a self-compensating wear-resistant sealing structure for the plunger assembly of a high-pressure plunger pump. Please refer to Figures 1 - 22 , including a high-pressure plunger pump main body 1, an oil suction and discharge oil tank 2, a fixing assembly 3, a first sealing structure 4, a second sealing structure 5, and a third sealing structure 6;

[0061] The right end of the high-pressure plunger pump body 1 is connected to an oil suction and discharge tank 2. Through the cooperation of the high-pressure plunger pump body 1 and the oil suction and discharge tank 2, the operation of oil transportation can be realized. The high-pressure plunger pump body 1 includes: a high-pressure plunger pump box 11, side plates 12, a rotating shaft 13, a plunger assembly 14, a first limiting frame 15, and a second limiting frame 16; the high-pressure plunger pump box 11 is placed on the ground, and the front end and the rear end of the high-pressure plunger pump box 11 are detachably installed with side plates 12. A rotating shaft 13 is connected between the two groups of side plates 12. Since a motor is installed on the left side of the front end of the front side plate 12, and the output end of the motor is connected to the front side port of the rotating shaft 13, the motor can drive the rotating shaft 13 to rotate. The outer wall of the rotating shaft 13 is connected to the plunger assembly 14, and the left end of the plunger assembly 14 is connected to the rotating shaft 13 through an eccentric wheel. By the rotation of the rotating shaft 13, the eccentric wheel can be driven to move, so that the eccentric wheel drives the plunger assembly 14 to perform pushing and pulling operations. The first limiting frame 15 is detachably installed in the middle of the interior of the high-pressure plunger pump box 11, and the outer wall of the plunger assembly 14 is slidably connected to the middle of the interior of the first limiting frame 15. Through the first limiting frame 15, the reciprocating pulling and pushing of the plunger assembly 14 can be limited and guided. The right end of the first limiting frame 15 is connected to the second limiting frame 16, and a fixing component 3 is installed inside the second limiting frame 16. Through the second limiting frame 16, the fixing component 3 can be disassembled and installed. At the same time, the second limiting frames 16 are connected by bolts, which is convenient for the disassembly, assembly, and installation of the fixing component 3;

[0062] The fixing component 3 is detachably installed at the right end inside the high-pressure plunger pump body 1, and the right end of the fixing component 3 is communicated with the left end inner wall of the oil suction and discharge tank 2. Through the fixing component 3, the first sealing structure 4, the second sealing structure 5, and the third sealing structure 6 can be installed and fixed. The fixing component 3 includes: a semi-cylindrical barrel 31, a fixing plate 32, and a fixing groove 33; two groups of semi-cylindrical barrels 31 are provided, and the two groups of semi-cylindrical barrels 31 are connected and installed by bolts. The two groups of semi-cylindrical barrels 31 are installed inside the second limiting frame 16 at the right end inside the high-pressure plunger pump body 1. The outer wall of the semi-cylindrical barrel 31 is provided with a fixing plate 32. By inserting the fixing plate 32 into the inner slot of the second limiting frame 16, the second limiting frame 16 fixes and limits the installation of the semi-cylindrical barrel 31. The inner wall of the semi-cylindrical barrel 31 is provided with a fixing groove 33. Through the fixing groove 33, the first sealing structure 4, the second sealing structure 5, and the third sealing structure 6 can be installed and fixed;

[0063] The first sealing structure 4 is detachably installed at the inner right end of the fixed component 3. Driven by the high-pressure plunger pump body 1, it can drive the first sealing structure 4 to perform a slight opening and closing operation, so as to introduce oil into the second sealing structure 5. At the same time, through the pumping effect of the first sealing structure 4, the oil can be supplemented to fill the gap generated by wear, similar to the active diversion of the heart valve, and then the self-compensation of wear is realized. The first sealing structure 4 includes: a first outer sealing component 41, a first mounting ring 411, a groove 412, a first outer sealing cylinder 413, a stop block 414, a second mounting ring 415, an opening and closing component 42, an opening and closing flap 421, a folding strip 422, a fitting piece 423 and a first diversion groove 424; The first outer sealing component 41 is installed at the inner right end of the semi-cylindrical tube 31. Through the first outer sealing component 41, the opening and closing component 42 can be installed, and at the same time, the gap of the opening and closing component 42 can be blocked to prevent oil from overflowing from the first outer sealing component 41. The first mounting ring 411 is installed at the inner right end of the semi-cylindrical tube 31. Grooves 412 are provided around the inner wall of the first mounting ring 411. Through the grooves 412, the right end of the opening and closing component 42 can be installed and limited. The left end of the first mounting ring 411 is connected to the first outer sealing cylinder 413. Stop blocks 414 are provided around the inner wall of the first outer sealing cylinder 413. The opening and closing component 42 is installed between the two stop blocks 414. Through the stop blocks 414, the installation of the opening and closing component 42 can be sealed. At the same time, through the cooperation of the first outer sealing cylinder 413 and the stop blocks 414, oil can be prevented from overflowing through the opening and closing component 42. The left end of the first outer sealing cylinder 413 is connected to a second mounting ring 415. Through the cooperation of the first mounting ring 411, the second mounting ring 415 and the first outer sealing cylinder 413, the installation of the opening and closing component 42 can be constricted, so that the opening and closing component 42 can move inside the first outer sealing component 41. The opening and closing component 42 is installed around the inner wall of the first outer sealing component 41. Through the active cooperation of the opening and closing component 42 and the plunger component 14, when the plunger component 14 is pulled to the left end, the air flow of the opening and closing component 42 flows to the left, and under the cooperation of the outer wall of the plunger component 14 and the left end of the opening and closing component 42, the opening and closing component 42 is slightly contracted. At the same time, through the pulling of the plunger component 14, the oil suction and the oil tank 2 can be operated to suck oil, so that the oil flows to the left end through the opening and closing component 42 to realize the oil pumping operation. The left end of the opening and closing flap 421 is movably connected to the inner wall of the second mounting ring 415. The outer end of the opening and closing flap 421 is made of alloy, and the inner end of the opening and closing flap 421 is made of colloid. Through the cooperation of the colloid and the stop blocks 414, the oil can be introduced to the left end. A folding strip 422 is provided at the top of the right end of the opening and closing flap 421. Through the folding strip 422, the right end of the opening and closing flap 421 can perform a slight opening and closing operation. The folding strip 422 is installed inside the groove 412. Through the groove 412, the compression of the folding strip 422 can be limited. The middle of the opening and closing flap 421 is placed between the two stop blocks 414. Through the limitation of the stop blocks 414,The oil that enters can flow quickly to the left end through the inclination of the opening and closing flap 421. The bottom of the left end of the opening and closing flap 421 is provided with a bonding piece 423. The bottom of the bonding piece 423 contacts the outer wall of the plunger assembly 14. Since the left side of the opening and closing flap 421 is inclined toward the center position of the first outer sealing assembly 41, when the plunger assembly 14 is pulled or pushed, the bonding piece 423 can be moved, thereby causing the bonding piece 423 to drive the opening and closing flap 421 to move, and then the opening and closing flap 421 can achieve a slight opening and closing movement under the toughness of the folding strip 422. The bottom of the opening and closing flap 421 and the bonding piece 423 are both provided with a first guide groove 423, and the opening and closing flap 421 and the first guide groove 423 at the bottom of the bonding piece 423 are connected to each other. Through the pulling and pushing activities of the plunger assembly 14, the air flow can circulate inside the first guide groove 423, thereby causing the air flow to drive the oil to be discharged in and out.

[0064] The second sealing structure 5 is detachably installed at the left end of the first sealing structure 4. Driven by the high-pressure plunger pump body 1, it can drive the second sealing structure 5 to perform a peristaltic operation. At the same time, through the peristaltic extrusion of the second sealing structure 5, the introduced oil can be redirected to the inner and outer sides of the second sealing structure 5 for storage, forming an oil buffer zone on the inner and outer sides of the second sealing structure 5. When the clearance increases due to wear of the plunger sealing surface, the high-pressure oil stored in the outer layer can backfill the clearance in the reverse direction to inhibit leakage, thereby realizing the secondary self-compensation operation. The second sealing structure 5 includes: a second outer sealing cylinder 51, a limiting component 52, a first limiting ring 521, a second limiting ring 522, a drain groove 523, a first peristaltic component 53, a V-ring 531, a spacer ring 532, a through hole 533, a second diversion groove 534, and a second peristaltic component 54; the right end of the second outer sealing cylinder 51 is connected to the left end of the first sealing structure 4. The second outer sealing cylinder 51 and the first peristaltic component 53 and the second peristaltic component 54 can temporarily store the oil discharged from the first sealing structure 4 to form an oil buffer zone. The limiting component 52 is installed at both ends of the inner wall of the second outer sealing cylinder 51. Through the limiting component 52, the first peristaltic component 53 and the second peristaltic component 54 can be connected and installed. At the same time, through the limiting component 52, the oil sucked by the first peristaltic component 53 can be discharged to the left end. The first limiting ring 521 is installed at the right end of the inner wall of the second outer sealing cylinder 51, and the left end of the first limiting ring 521 is connected to the second peristaltic component 54. The second limiting ring 522 is installed at the left end of the inner wall of the second outer sealing cylinder 51, and the right end of the second limiting ring 522 is connected to the first peristaltic component 53. Drain grooves 523 are provided around the surface of the second limiting ring 522. Through the drain grooves 523, the oil stored between the second outer sealing cylinder 51 and the first peristaltic component 53 and the second peristaltic component 54 can be discharged. The limiting component 52 connects the first peristaltic component 53 and the second peristaltic component 54. The first peristaltic component 53 and the second peristaltic component 54 are connected to each other. The left end of the V-ring 531 is connected to the right end of the second limiting ring 522. Through the design of the V-ring 531, the V-ring 531 can contract and extend along with the movement of the plunger assembly 14. The right end of the V-ring 531 is connected to the spacer ring 532, and the right end of the spacer ring 532 is connected to the second peristaltic component 54. The first peristaltic component 53 and the second peristaltic component 54 are placed alternately, and the second peristaltic component 54 is only arranged at the left end inside the second outer sealing cylinder 51, while the right end inside the second outer sealing cylinder 51 is connected by several groups of the second peristaltic component 54. After the oil enters the left end inside the second outer sealing cylinder 51, it can be sucked by the first peristaltic component 53, so that the suction force generated by the contraction of the first peristaltic component 53 and the second peristaltic component 54 is at the maximum value, enabling the oil to be smoothly sucked by the first peristaltic component 53. Through holes 533 are provided at the top and bottom of the V-ring 531. When the oil is discharged from the first sealing structure 4 into the inside of the first peristaltic component 53 and the second peristaltic component 54,At this time, the oil is between the inside of the first peristaltic component 53 and the second peristaltic component 54 and the outer wall of the plunger component 14. When the plunger component 14 is twitched, the twitching airflow generated cooperates with the contraction and peristalsis of the first peristaltic component 53 and the second peristaltic component 54, so that the oil can pass through the through hole 533 and be discharged into the space between the first peristaltic component 53 and the second peristaltic component 54 and the second outer sealing cylinder 51 for temporary storage, thereby realizing the reverse filling of the gap by the stored high-pressure oil, suppressing leakage, and then realizing the secondary self-compensation operation. A second guide groove 534 is provided around the inner wall of the spacer ring 532. Through the active cooperation of the second guide groove 534 and the plunger component 14, the plunger component 14 can generate an airflow flowing to the left when twitching, and the plunger component 14 can be pushed. When the piston 14 is moved, an air flow flowing to the right is generated, thereby driving the oil to move. The second peristaltic component 54 and the second peristaltic component 54 are both set to several groups. Through the cooperation of the first peristaltic component 53 and the second peristaltic component 54, when the plunger component 14 is pulled, the first peristaltic component 53 and the second peristaltic component 54 are contracted, so that the first peristaltic component 53 sucks the oil entering the inner wall to the upper end. When the plunger component 14 is pushed out, the first peristaltic component 53 and the second peristaltic component 54 are extended, and the oil can be smoothly discharged through the inner walls of the first peristaltic component 53 and the second peristaltic component 54. The structure of the second peristaltic component 54 is the same as that of the first peristaltic component 53, except that the second peristaltic component 54 does not have a through hole 533.

[0065] The third sealing structure 6 is detachably installed at the left end of the second sealing structure 5. Through the drive of the high-pressure plunger pump body 1 and the cooperation with the second sealing structure 5, the oil inside and outside the second sealing structure 5 can enter the third sealing structure 6, causing the oil to fill and expand the left end of the third sealing structure 6, and performing non-contact pressure self-tightening sealing on the outer wall of the plug column. This avoids the hard extrusion wear of traditional sealing rings, eliminates the risk of extrusion breakage, and can prevent backflow. At the same time, when the plug column is pushed out, the airflow generated by the push of the plug column can drive the filled oil to be discharged through the notch at the right end of the inner wall of the third sealing structure 6 until the oil is discharged into the inside of the oil suction and discharge tank 2. The third sealing structure 6 includes: a second outer sealing component 61, a third outer sealing cylinder 611, an outer cavity layer cylinder 612, an installation groove 613, a one-way valve orifice 614, a spiral discharge component 62, an outer discharge cylinder 621, a spiral groove 622, a filling component 63, an isolation sealing ring 631, a liquid storage groove 632, and an outer discharge pipe 633; the right end of the second outer sealing component 61 is connected to the left end of the second sealing structure 5, and the left end of the second outer sealing component 61 is installed inside the left end of the fixing component 3. Through the second outer sealing component 61, the oil discharged by the limiting component 52 can be received and temporarily stored, and at the same time, the oil can be discharged to the inner wall of the second outer sealing component 61. The right end of the third outer sealing cylinder 611 is connected to the left end of the second sealing structure 5, and the left end of the third outer sealing cylinder 611 is installed inside the left end of the fixing component 3. An outer cavity layer cylinder 612 is provided inside the third outer sealing cylinder 611. Through the outer cavity layer cylinder 612, the oil discharged by the second sealing structure 5 can be received. An installation groove 613 is provided at the left end of the inner wall of the outer cavity layer cylinder 612. Through the installation groove 613, the filling component 63 can be installed and limited. One-way valve orifices 614 are provided around the surface of the installation groove 613. Through the one-way valve orifices 614, the oil inside the outer cavity layer cylinder 612 can be discharged into the inner wall of the outer cavity layer cylinder 612, and the oil on the inner wall of the outer cavity layer cylinder 612 can be prevented from re-entering the inside of the outer cavity layer cylinder 612, thereby preventing the reverse flow of the incoming oil and the discharged oil, which may cause the oil to not flow smoothly in a cycle. The right end of the inner wall of the second outer sealing component 61 is connected with a spiral discharge component 62. The outer discharge cylinder 621 is installed at the right end inside the third outer sealing cylinder 611. Spiral grooves 622 are provided around the inner wall of the outer discharge cylinder 621. Through the spiral grooves 622, the airflow moving to the right end can be extended, thereby slowing down the rate of the oil moving to the right end and preventing the oil from jetting out due to excessive pressure. At the same time, a dynamic pressure lubricating film is formed by the oil in the spiral grooves 622, converting the sealing surface contact form from dry friction to fluid lubrication, reducing the friction coefficient of the sealing structure, and thus increasing the wear resistance of the sealing structure. The left end of the spiral discharge component 62 is connected to the filling component 63. The filling component 63 is installed at the left end of the inner wall of the second outer sealing component 61. Through the cooperation between the filling component 63 and the second outer sealing component 61, the oil can be discharged into the inside of the filling component 63, causing the filling component 63 to expand rapidly,The filling assembly 63 can perform a non-contact pressure self-tight seal on the outer wall of the plunger assembly 14. The oil can be discharged to the right end through the cooperation of the filling assembly 63 and the spiral discharge assembly 62. The isolation seal ring 631 is installed inside the installation groove 613. The interior of the isolation seal ring 631 is provided with a liquid storage groove 632. The oil can be discharged into the liquid storage groove 632 through the one-way valve hole 614, so that the liquid storage groove 632 fills the interior of the isolation seal ring 631, causing the isolation seal ring 631 to expand, thereby causing the inner wall of the isolation seal ring 631 to perform a non-contact pressure self-tight seal on the outer wall of the plunger assembly 14. A contact-type, pressure-tightening seal prevents oil from flowing back to the left end. The right end of the isolation seal ring 631 is connected to an external discharge pipe 633. The right end of the external discharge pipe 633 is connected to the left end of the outer wall of the external discharge cylinder 621. The left side of the external discharge pipe 633 is connected to the liquid storage tank 632, and the right side of the external discharge pipe 633 is connected to the spiral groove 622. When the plunger assembly 14 is pumped, the oil moves into the liquid storage tank 632 through the airflow, filling and expanding the isolation seal ring 631. When the plunger assembly 14 is pushed, the airflow drives the oil through the external discharge pipe 633 and the spiral groove 622, and is discharged toward the inner wall of the second sealing structure 5.

[0066] In specific use, those skilled in the art connect the input end of the oil absorption and discharge tank 2 to the oil fluid and the output end to the pipeline. When transporting the oil fluid, by starting the high-pressure plunger pump body 1, the rotating shaft 13 rotates to drive the plunger assembly 14 to perform reciprocating pumping and pushing activities. When the plunger assembly 14 pumps, the oil fluid is sucked into the interior of the first sealing structure 4 by the plunger assembly 14 through the oil absorption and discharge tank 2. Due to the design of the opening and closing assembly 42, the oil enters the interior of the first peristaltic assembly 53 and the second peristaltic assembly 54 of the second sealing structure 5 through the first diversion groove 424 of the opening and closing flap 421. Since the plunger assembly 14 is in the pumping state, the pumping of the plunger assembly 14 drives the first peristaltic assembly 53 and the second peristaltic assembly 54 to compress, and the oil is introduced between the second outer sealing cylinder 51 and the first peristaltic assembly 53 and the second peristaltic assembly 54 through the through hole 533, and is discharged into the outer cavity layer cylinder 612 of the third sealing structure 6 through the liquid discharge groove 523 of the limiting assembly 52. Through the pumping of the plunger assembly 14, the spiral groove 622 is communicated with the right end of the outer discharge pipe 633, so that the air flow in the spiral groove 622 accelerates and flows to the left end, thereby pulling the oil fluid in the outer cavity layer cylinder 612 to be poured into the interior of the liquid storage tank 632 through the one-way valve hole 614, expanding the isolation sealing ring 631, and enabling the isolation sealing ring 631 to perform non-contact pressure self-tightening sealing on the outer wall of the plunger assembly 14 to prevent the oil fluid from flowing back to the left end. When the plunger assembly 14 pushes to the right end, at this time the air flow flows to the right end, and the air flow will drive the oil fluid to flow from the liquid storage tank 632 through the outer discharge pipe 633 into the interior of the spiral groove 622, and then be discharged into the interior of the first peristaltic assembly 53 and the second peristaltic assembly 54 through the spiral groove 622. At this time, the first peristaltic assembly 53 and the second peristaltic assembly 54 are stretched by the push of the plunger assembly 14, and the oil fluid flows to the right end along with the flow of the air flow. Most of the oil flows into the interior of the first sealing structure 4 through the second diversion groove 534, and a small amount of oil fluid is stored on the inner wall of the V-ring 531, so that the plunger assembly 14 changes from dry friction to fluid lubrication. At this time, the plunger assembly 14 continues to push, driving the oil fluid to flow to the right end from the inner wall of the first diversion groove 424 and the opening and closing flap 421 until the oil fluid is pushed into the interior of the oil absorption and discharge tank 2, and then the oil is pressurized and discharged through the output end of the oil absorption and discharge tank 2. Through the reciprocating pumping and pushing activities of the plunger assembly 14, the oil fluid completes pressurized transportation.

[0067] Although the present invention has been described above with reference to the embodiments, various modifications can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed by the present invention can be combined with each other in any way, and the exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. Self-compensating wear-resistant sealing structure of the plunger assembly of a high-pressure plunger pump, comprising: The main body of the high-pressure plunger pump (1) and the oil suction and discharge tank (2), characterized in that: The right end of the main body of the high-pressure plunger pump (1) is connected to the oil suction and discharge tank (2). A fixing component (3) is detachably installed at the right end inside the main body of the high-pressure plunger pump (1). The right end of the fixing component (3) communicates with the left end inner wall of the oil suction and discharge tank (2). A first sealing structure (4) is detachably installed at the right end inside the fixing component (3). Driven by the main body of the high-pressure plunger pump (1), it is used to drive the first sealing structure (4) to perform a fine opening and closing operation. A second sealing structure (5) is detachably installed at the left end of the first sealing structure (4). Driven by the main body of the high-pressure plunger pump (1), it is used to drive the second sealing structure (5) to perform a peristaltic operation. A third sealing structure (6) is detachably installed at the left end of the second sealing structure (5). Through the cooperation of the drive of the main body of the high-pressure plunger pump (1) and the second sealing structure (5), the oil inside and outside the second sealing structure (5) enters the third sealing structure (6), so that the oil fills and expands the left end of the third sealing structure (6), and performs a non-contact pressure self-tightening seal on the outer wall of the plug.

2. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 1, characterized in that The main body of the high-pressure plunger pump (1) includes: a high-pressure plunger pump box body (11); The high-pressure plunger pump box body (11) is placed on the ground. Side plates (12) are detachably installed at the front end and the rear end of the high-pressure plunger pump box body (11). A rotating shaft (13) is connected between the two side plates (12). A plunger assembly (14) is connected to the outer wall of the rotating shaft (13). The left end of the plunger assembly (14) is connected to the rotating shaft (13) through an eccentric wheel. A first limiting frame (15) is detachably installed in the middle inside the high-pressure plunger pump box body (11). The outer wall of the plunger assembly (14) is slidably connected to the middle inside the first limiting frame (15). The right end of the first limiting frame (15) is connected to a second limiting frame (16). The fixing component (3) is installed inside the second limiting frame (16).

3. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 2, characterized in that, The fixing component (3) includes: a semi-cylindrical barrel (31); Two semi-cylindrical barrels (31) are provided. The two semi-cylindrical barrels (31) are connected and installed by bolts. The two semi-cylindrical barrels (31) are installed inside the second limiting frame (16) at the right end inside the main body of the high-pressure plunger pump (1). A fixing plate (32) is provided on the outer wall of the semi-cylindrical barrel (31), and a fixing groove (33) is provided on the inner wall of the semi-cylindrical barrel (31).

4. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 3, characterized in that, The first sealing structure (4) includes: a first outer sealing component (41); The first outer sealing component (41) is installed at the right end inside the semi-cylindrical barrel (31). Opening and closing components (42) are installed around the inner wall of the first outer sealing component (41).

5. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 4, wherein The first outer sealing component (41) includes: a first mounting ring (411); The first mounting ring (411) is mounted at the inner right end of the semi-cylindrical tube (31). Grooves (412) are provided around the inner wall of the first mounting ring (411). The left end of the first mounting ring (411) is connected to the first outer sealing tube (413). Blocks (414) are provided around the inner wall of the first outer sealing tube (413). An opening and closing assembly (42) is mounted between two groups of blocks (414). The left end of the first outer sealing tube (413) is connected to a second mounting ring (415). The opening and closing assembly (42) includes: an opening and closing flap (421). The left end of the opening and closing flap (421) is movably connected to the inner wall of the second mounting ring (415). A folding strip (422) is provided at the top of the right end of the opening and closing flap (421). The folding strip (422) is mounted inside the groove (412). The middle of the opening and closing flap (421) is placed between two groups of blocks (414). A fitting piece (423) is provided at the bottom of the left end of the opening and closing flap (421). The bottom of the fitting piece (423) contacts the outer wall of the plunger assembly (14). First flow channels (423) are provided at the bottoms of both the opening and closing flap (421) and the fitting piece (423).

6. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 5, characterized in that, The second sealing structure (5) includes: a second outer sealing tube (51). The right end of the second outer sealing tube (51) is connected to the left end of the first sealing structure (4). Limit assemblies (52) are mounted at both ends of the inner wall of the second outer sealing tube (51). The first peristaltic assembly (53) and the second peristaltic assembly (54) are connected between the limit assemblies (52). The first peristaltic assembly (53) and the second peristaltic assembly (54) are connected to each other. Both the first peristaltic assembly (53) and the second peristaltic assembly (54) are provided in several groups.

7. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 6, characterized in that The limit assembly (52) includes: a first limit ring (521) and a second limit ring (522). The first limit ring (521) is mounted at the inner right end of the second outer sealing tube (51). The left end of the first limit ring (521) is connected to the second peristaltic assembly (54). The second limit ring (522) is mounted at the inner left end of the second outer sealing tube (51). The right end of the second limit ring (522) is connected to the first peristaltic assembly (53). Drainage grooves (523) are provided around the surface of the second limit ring (522). The first peristaltic assembly (53) includes: a V-ring (531). The left end of the V-ring (531) is connected to the right end of the second limit ring (522). The right end of the V-ring (531) is connected to a spacer ring (532). The right end of the spacer ring (532) is connected to the second peristaltic assembly (54). Through holes (533) are provided at the top and bottom of the V-ring (531). Second flow channels (534) are provided around the inner wall of the spacer ring (532).

8. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 7, wherein, The third sealing structure (6) includes: a second outer sealing assembly (61). The right end of the second outer sealing assembly (61) is connected to the left end of the second sealing structure (5), the left end of the second outer sealing assembly (61) is installed at the inner left end of the fixing assembly (3), a spiral discharge assembly (62) is connected to the right end of the inner wall of the second outer sealing assembly (61), the left end of the spiral discharge assembly (62) is connected to a filling assembly (63), and the filling assembly (63) is installed at the inner left end of the inner wall of the second outer sealing assembly (61).

9. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 8, characterized in that, The second outer sealing assembly (61) includes: a third outer sealing cylinder (611); The right end of the third outer sealing cylinder (611) is connected to the left end of the second sealing structure (5), the left end of the third outer sealing cylinder (611) is installed at the inner left end of the fixing assembly (3), an outer cavity layer cylinder (612) is provided inside the third outer sealing cylinder (611), an installation groove (613) is provided at the left end of the inner wall of the outer cavity layer cylinder (612), and one-way valve holes (614) are provided around the surface of the installation groove (613); The spiral discharge assembly (62) includes: an outer discharge cylinder (621); The outer discharge cylinder (621) is installed at the inner right end of the third outer sealing cylinder (611), and spiral grooves (622) are provided around the inner wall of the outer discharge cylinder (621).

10. The self-compensating wear-resistant sealing structure of the plunger assembly of the high-pressure plunger pump according to claim 9, characterized in that, The filling assembly (63) includes: an isolation sealing ring (631); The isolation sealing ring (631) is installed inside the installation groove (613), a liquid storage groove (632) is provided inside the isolation sealing ring (631), outer discharge pipes (633) are connected around the right end of the isolation sealing ring (631), the right ends of the outer discharge pipes (633) are connected to the left end of the outer wall of the outer discharge cylinder (621), the left side of the outer discharge pipes (633) is communicated with the liquid storage groove (632), and the right side of the outer discharge pipes (633) is communicated with the spiral grooves (622).

Images