CN221278459U - High-pressure water pump composite integrated sealing structure - Google Patents

Abstract

The utility model relates to the technical field of water pump sealing, and discloses a composite integrated sealing structure of a high-pressure water pump, wherein a packing assembly is arranged in the middle of a plunger, the packing assembly comprises a plastic check ring and a composite packing, the two plastic check rings are respectively arranged at the upper side and the lower side of the composite packing, the composite packing comprises an upper packing seat and a lower packing seat, the sealing structure adopts the packing assembly of the composite packing, the packing assembly is formed by compounding the composite packing and the plastic check ring, the sealing performance is improved, the friction loss is reduced, the plastic check rings are additionally arranged at two sides, the hard plastic check rings at two sides have higher strength, the protection effect on the composite packing is further improved, the overall sealing performance and the shock resistance are further considered, and the packing assembly has compact structure, and various performances such as the sealing performance, the wear resistance, the shock resistance and the like are improved compared with the existing sealing ring sealing structure.

Description

High-pressure water pump composite integrated sealing structure

Technical Field

The utility model relates to the technical field of water pump sealing, in particular to a composite integrated sealing structure of a high-pressure water pump.

Background

The high-pressure water pump is a machine for conveying or pressurizing liquid, and can transfer the mechanical energy of prime motor or other external energy to liquid so as to implement pressurized conveying of liquid, and the plunger pump is one of high-pressure water pumps, and can make volume of sealed working cavity be changed to implement oil-sucking and oil-pressing. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, is widely applied to occasions requiring high pressure, high flow and flow regulation, such as hydraulic presses, engineering machinery and ships, has higher requirements on tightness because the interior of the plunger pump is in a high-pressure state, and is provided with a special sealing structure in order to ensure the normal work of a pump body.

The sealing structure in the existing plunger pump adopts a sealing ring as a sealing structure, the harder the sealing ring is, the better the wear resistance is, the longer the service life is, the higher the applicable pressure is, but the sealing performance generally decreases along with the increase of the hardness, in addition, the number of the sealing rings also influences the sealing reliability, generally, the larger the number is, the better the sealing effect is, but the increase of the number can lead to the increase of the friction of the plunger and the generation of more heat, so that the sealing ring is damaged too early, the mechanical efficiency of the pump is reduced due to the increase of the resistance, the contact pressure is increased due to the compression, the abrasion is also increased, the ablation is easy to occur, and the service life of the sealing structure is greatly reduced.

Disclosure of utility model

The utility model aims to provide a composite integrated sealing structure of a high-pressure water pump, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the composite integrated sealing structure of the high-pressure water pump comprises a sealing mechanism arranged outside a plunger, wherein a cylinder body is arranged outside the plunger, and the sealing mechanism is arranged inside the cylinder body;

Sealing mechanism includes jump ring, first copper retaining ring, oil blanket, second copper retaining ring, first phenolic aldehyde guide ring, packing subassembly, second phenolic aldehyde guide ring, compresses tightly cover and spring, the packing subassembly sets up in the middle part of plunger, the packing subassembly includes plastic retaining ring and compound packing, the quantity of plastic retaining ring is two, two plastic retaining ring sets up respectively in the upper and lower both sides of compound packing, compound packing includes packing seat and lower packing seat.

Preferably, the plunger is movably disposed in the cylinder, a mounting groove is formed in the cylinder, and the sealing mechanism is fixedly mounted in the cylinder through the mounting groove.

Preferably, the clamping spring, the first copper retainer ring and the oil seal are all embedded and arranged on the upper opening side of the cylinder body, the first copper retainer ring is arranged on the lower portion of the clamping spring, and the oil seal is arranged on the lower portion of the first copper retainer ring.

Preferably, the upper portion of the cylinder body is provided with a through hole, the second copper retainer ring is arranged below the oil seal and separated from the oil seal through the through hole, the second copper retainer ring is embedded and installed on the inner side of the cylinder body, the first phenolic aldehyde guide ring is arranged on the lower portion of the second copper retainer ring, and the packing assembly is arranged on the lower portion of the first phenolic aldehyde guide ring.

Preferably, the bottom of above-mentioned last packing seat is provided with the recess, the top of packing seat is provided with the lug down, lug and recess looks adaptation, the packing seat passes through the lug gomphosis in the bottom of last packing seat down, the inner ring side of packing seat is provided with the arc main seal face down, the outer circumference side of arc main seal face and plunger is laminated mutually, the outer ring side lower part of packing seat is provided with the vice seal lip of inclined plane form down.

Preferably, the two plastic check rings are symmetrically arranged on the upper side and the lower side of the composite packing, the upper side of the plastic check rings are attached to the bottom side of the first phenolic aldehyde guide ring, the connecting sides of the two plastic check rings are provided with arc-shaped grooves, the upper parts of the upper packing seat and the lower packing seat are provided with arc-shaped matching surfaces matched with the arc-shaped grooves, the two plastic check rings are respectively tightly embedded with the sides of the upper packing seat and the lower packing seat through the arc-shaped grooves, lips are arranged on the two sides of the arc-shaped grooves, and straight matching edges are arranged on the sides of the upper ring edges of the upper packing seat.

Preferably, the second phenolic aldehyde guiding ring is attached to the bottom side of the plastic retainer ring at the lower side, the pressing sleeve is arranged at the lower part of the second phenolic aldehyde guiding ring, a spring is sleeved outside the pressing sleeve, a connecting sleeve is arranged at the lower part of the pressing sleeve, and the connecting sleeve is connected to the opening side at the lower part of the cylinder body.

Compared with the prior art, the technical scheme provided by the utility model has the following technical effects:

This seal structure adopts compound packing subassembly, packing subassembly is by compound packing and plastics retaining ring complex constitution, compound packing mainly realizes sealedly through the interference volume of rubber itself, sealing performance has been improved, friction loss has been reduced, and then the life of sealing member has been prolonged, and plastic retaining ring has been increased in both sides, the plastic retaining ring of both sides stereoplasm has higher intensity, can play the guard action to compound packing, holistic sealing performance and shock resistance have further been improved, packing subassembly compromise intensity and elasticity, its compact structure, the leakproofness, wearability, various performances such as shock resistance all improve to some extent than current sealing washer seal structure.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic overall perspective view of the present utility model;

FIG. 2 is a schematic view of the overall internal cross-sectional structure of the present utility model;

FIG. 3 is a schematic view of the internal structure of the cylinder body of the present utility model;

FIG. 4 is a schematic view of the upper side of the packing assembly of the present utility model;

FIG. 5 is a schematic view of the lower split construction of the packing assembly of the present utility model;

Fig. 6 is a schematic cross-sectional view of a packing assembly according to the present utility model.

Reference numerals illustrate: 1. a plunger; 2. a cylinder; 3. a sealing mechanism; 4. clamping springs; 5. a first copper collar; 6. an oil seal; 7. a second copper collar; 8. a first phenolic aldehyde guide ring; 9. a packing assembly; 10. a second phenolic aldehyde guide ring; 11. a compacting sleeve; 12. a spring; 13. a connecting cylinder sleeve; 14. a plastic retainer ring; 15. an upper packing seat; 16. a lower packing seat; 17. an arc-shaped groove; 18. an arcuate mating surface; 19. a lip; 20. straight mating edges; 21. a bump; 22. an arcuate primary sealing surface; 23. and the bevel-shaped auxiliary sealing lip.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the application, which is defined by the claims, but rather by the claims, unless otherwise indicated, and that any structural modifications, proportional changes, or dimensional adjustments, which would otherwise be apparent to those skilled in the art, would be made without departing from the spirit and scope of the application.

Examples

Referring to fig. 1-6, the present utility model provides a technical solution: the utility model provides a compound integral type seal structure of high pressure water pump, includes setting up at the outside sealing mechanism 3 of plunger 1, and the outside of plunger 1 is provided with cylinder body 2, and the upper and lower both sides of cylinder body 2 all are provided with the installation opening, and the inside of installation opening is provided with the mounting groove, and sealing mechanism 3 passes through mounting groove fixed mounting in the inside of cylinder body 2, realizes the installation seal to plunger 1.

The sealing mechanism 3 comprises a clamp spring 4, a first copper retainer ring 5, an oil seal 6, a second copper retainer ring 7, a first phenolic aldehyde guide ring 8, a packing assembly 9, a second phenolic aldehyde guide ring 10, a compression sleeve 11 and a spring 12, and in order to realize the sealing of the upper opening of the cylinder body 2, the clamp spring 4, the first copper retainer ring 5 and the oil seal 6 are all embedded and arranged on the side of the upper opening of the cylinder body 2, the first copper retainer ring 5 is arranged on the lower part of the clamp spring 4, the oil seal 6 is arranged on the lower part of the first copper retainer ring 5, and the sealing of the upper opening of the cylinder body 2 is realized.

The second copper retainer ring 7 is embedded and installed on the inner side of the cylinder body 2 from the opening at the lower part, the first phenolic aldehyde guide ring 8 is arranged on the lower part of the second copper retainer ring 7, the packing assembly 9 is arranged on the lower part of the first phenolic aldehyde guide ring 8, the packing assembly 9 is arranged on the middle part of the plunger 1, the packing assembly 9 comprises two plastic retainer rings 14 and compound packing, the number of the plastic retainer rings 14 is two, the compound packing comprises an upper packing seat 15 and a lower packing seat 16, the upper packing seat 15 is made of fiber clamping cloth, the lower packing seat 16 is made of hydrogenated nitrile, the bottom of the upper packing seat 15 is provided with a groove, the top of the lower packing seat 16 is provided with a lug 21, the lug 21 is matched with the groove, the lower packing seat 16 is embedded on the bottom of the upper packing seat 15 through the lug 21, the clamping cloth part uses the shape of the V-shaped opening, the packing assembly has certain elastic compensation capacity, the groove increases the adhesion area between the clamping cloth and rubber, the two plastic retainer rings are integrally vulcanized, the two plastic retainer rings are tightly combined together, the structure is more compact than the structure used by split combination, the sealing packing seat 15 is more stable, the compound packing seat 15 is made of fiber clamping cloth, the pre-pressing plate is manufactured by adopting a pre-pressing method, the pre-pressing plate is carried out, and the pre-pressing plate is replaced, and the pre-pressing plate is manufactured, and the pre-pressing plate is carried, and the pre-pressing plate is replaced, and the raw material is replaced.

In order to improve the sealing performance, an arc-shaped main sealing surface 22 is arranged on the inner ring side of the lower packing seat 16, the arc-shaped main sealing surface 22 is attached to the outer circumferential side of the plunger 1, the composite packing is sealed mainly through the interference of rubber, hydrogenated nitrile rubber has good wear resistance and temperature resistance, the friction coefficient of a cloth clamping part is small, the generation of heat is reduced, the cloth clamping and the rubber are vulcanized integrally, the overall wear resistance of the composite packing is improved, an inclined-plane-shaped auxiliary sealing lip 23 is arranged on the lower part of the outer ring side of the lower packing seat 16, and the sealing performance between the lower packing seat 16 and the inner wall of the cylinder body 2 can be improved.

The size of two plastic retaining rings 14 is the same, plastic retaining ring 14 is that rigid plastic polyether ether ketone or polyoxymethylene, polytetrafluoroethylene etc. are formed through the lathe work, two plastic retaining rings 14 are the symmetry form and set up in the upper and lower both sides of compound packing, upside plastic retaining ring 14 laminating is in the downside of first phenolic aldehyde guide ring 8, the connection side of two plastic retaining rings 14 all is provided with arc recess 17, the arc recess 17 of plastic retaining ring 14 is towards compound packing, the upper portion of upper packing seat 15 and lower packing seat 16 all is provided with the arc fitting surface 18 with arc recess 17 looks adaptation, two plastic retaining rings 14 pass through arc recess 17 respectively with the limit side inseparable of upper packing seat 15 and lower packing seat 16, the cladding of both sides arc recess 17 to compound packing makes its pressure-bearing more even, make the life of sealing member obtain the extension, the both sides of arc recess 17 all are provided with lip 19, the upper portion rim side of upper packing seat 15 is provided with straight mating edge 20, the 19 and the arc recess 17 on the limit side respectively with the straight mating surface 20 on compound packing upper portion and the limit of arc recess 17, the plastic retaining ring shape of limit side and the limit side of compound packing is provided with the plastic lip 19, the impact resistance is further improved, the impact resistance of the plastic sealing ring has to set up with the side of the second side, the impact resistance of the plastic sealing ring is more than the whole, the sealing performance is improved, and the sealing performance has been set up with the whole.

The pressing sleeve 11 is arranged at the lower part of the second phenolic aldehyde guide ring 10, the spring 12 is sleeved outside the pressing sleeve 11, the connecting sleeve 13 is arranged at the lower part of the pressing sleeve 11, the connecting sleeve 13 is in threaded connection with the lower opening side of the cylinder body 2, the port side of the connecting sleeve 13 is in contact with the bottom end of the spring 12, the pressing sleeve 11 is in contact with the pressing sleeve through screwing, the middle part of each sealing element is provided with a mounting sleeve hole, and the plunger 1 is movably inserted and arranged in the cylinder body 2 through the mounting sleeve hole.

The working principle or the structure principle, when the equipment is disassembled and then is installed, the second copper retainer ring 7 and the first phenolic aldehyde guide ring 8 are sequentially installed, then the two plastic retainer rings 14 are embedded with the side of the composite packing, then the plastic retainer rings 14 and the composite packing are installed into the cylinder body 2 together, then the second phenolic aldehyde guide ring 10 and the compression sleeve 11 are installed, the spring 12 is installed outside the compression sleeve 11, then the connection cylinder sleeve 13 is installed, the pushing and locking of each sealing piece is achieved, the plunger 1 is installed into the cylinder body 2, and after the completion, the oil seal 6, the first copper retainer ring 5 and the clamp spring 4 are sequentially installed into the opening side of the upper portion of the cylinder body 2, and the installation of the device is completed.

In summary, this seal structure adopts compound packing subassembly 9, packing subassembly 9 is by compound packing and plastics retaining ring 14 complex constitution, compound packing mainly realizes sealedly through the interference volume of rubber itself, sealing performance has been improved, friction loss has been reduced, and then the life of sealing member has been prolonged, and plastics retaining ring 14 has been increased in both sides, both sides rigid plastics retaining ring 14 has higher intensity, can play the guard action to compound packing, further whole sealing performance and shock resistance have been improved, packing subassembly 9 compromise intensity and elasticity, its compact structure, the leakproofness, various performances such as wearability, shock resistance all improve to some extent than current sealing washer seal structure.

Thus, embodiments of the present utility model have been described in detail with reference to the accompanying drawings. It should be noted that, in the drawings or the text of the specification, implementations not shown or described are all forms known to those of ordinary skill in the art, and not described in detail. Furthermore, the above definitions of the components are not limited to the specific structures, shapes or modes mentioned in the embodiments, and may be simply modified or replaced by those of ordinary skill in the art.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the utility model thereto, but to limit the utility model thereto, and any modifications, equivalents, improvements and equivalents thereof may be made without departing from the spirit and principles of the utility model.

Claims (7)

1. The utility model provides a compound integral type seal structure of high pressure water pump, includes sealing mechanism (3) of setting outside plunger (1), its characterized in that: the outside of the plunger (1) is provided with a cylinder body (2), and the sealing mechanism (3) is arranged inside the cylinder body (2);

sealing mechanism (3) are including jump ring (4), first copper retaining ring (5), oil blanket (6), second copper retaining ring (7), first phenolic aldehyde guide ring (8), packing subassembly (9), second phenolic aldehyde guide ring (10), compress tightly cover (11) and spring (12), packing subassembly (9) set up in the middle part of plunger (1), packing subassembly (9) are including plastics retaining ring (14) and compound packing, the quantity of plastics retaining ring (14) is two plastics retaining ring (14) set up respectively in the upper and lower both sides of compound packing, compound packing includes packing seat (15) and lower packing seat (16).

2. The high-pressure water pump composite integrated sealing structure according to claim 1, wherein: the plunger (1) is movably arranged in the cylinder body (2), an installation groove is formed in the cylinder body (2), and the sealing mechanism (3) is fixedly installed in the cylinder body (2) through the installation groove.

3. The high-pressure water pump composite integrated sealing structure according to claim 2, wherein: the clamping spring (4), the first copper check ring (5) and the oil seal (6) are all embedded and arranged on the upper opening side of the cylinder body (2), the first copper check ring (5) is arranged on the lower portion of the clamping spring (4), and the oil seal (6) is arranged on the lower portion of the first copper check ring (5).

4. A high pressure water pump composite integral seal structure as claimed in claim 3, wherein: the upper portion of cylinder body (2) is provided with the through-hole, second copper retaining ring (7) set up in the below of oil blanket (6) and separate with oil blanket (6) through the through-hole, second copper retaining ring (7) gomphosis is installed in the inboard of cylinder body (2), first phenolic aldehyde guide ring (8) set up in the lower part of second copper retaining ring (7), packing subassembly (9) set up in the lower part of first phenolic aldehyde guide ring (8).

5. A high pressure water pump composite integral seal structure as claimed in claim 3, wherein: the bottom of going up packing seat (15) is provided with the recess, the top of packing seat (16) is provided with lug (21), lug (21) and recess looks adaptation down, packing seat (16) are through lug (21) gomphosis in the bottom of last packing seat (15), the inner ring side of packing seat (16) is provided with arc main seal face (22) down, arc main seal face (22) laminate with the outer circumference side of plunger (1) mutually, the outer ring side lower part of packing seat (16) is provided with inclined plane form pair seal lip (23 down.

6. The high-pressure water pump composite integrated sealing structure according to claim 5, wherein: two plastic check rings (14) are the symmetry form and set up in the upper and lower both sides of compound packing, and the upside plastic check ring (14) laminating is in the bottom side of first phenolic aldehyde guide ring (8), two the connection side of plastic check ring (14) all is provided with arc recess (17), the upper portion of last packing seat (15) and lower packing seat (16) all is provided with arc mating surface (18) with arc recess (17) looks adaptation, two plastic check ring (14) pass through arc recess (17) respectively with the limit side inseparable of last packing seat (15) and lower packing seat (16), the both sides of arc recess (17) all are provided with lip (19), the upper portion circle avris of going up packing seat (15) is provided with straight mating edge (20).

7. The high pressure water pump composite integral seal structure of claim 6, wherein: the second phenolic aldehyde guide ring (10) laminating sets up in the downside of the plastic retaining ring (14) of downside, compress tightly cover (11) and set up in the lower part of second phenolic aldehyde guide ring (10), the outside cover of compressing tightly cover (11) is equipped with spring (12), the lower part of compressing tightly cover (11) is provided with connecting sleeve (13), connecting sleeve (13) are connected in the lower part opening side of cylinder body (2).