CN114992115B - Sweat gland imitation self-compensating lubricating piston for slurry pump - Google Patents
Sweat gland imitation self-compensating lubricating piston for slurry pump Download PDFInfo
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- CN114992115B CN114992115B CN202210767066.8A CN202210767066A CN114992115B CN 114992115 B CN114992115 B CN 114992115B CN 202210767066 A CN202210767066 A CN 202210767066A CN 114992115 B CN114992115 B CN 114992115B
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- Prior art keywords
- connecting rod
- piston
- leather cup
- sweat
- gland
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- 210000000106 sweat gland Anatomy 0.000 title claims abstract description 50
- 239000002002 slurry Substances 0.000 title claims abstract description 25
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 20
- 239000010985 leather Substances 0.000 claims abstract description 64
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 210000004907 gland Anatomy 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 abstract description 8
- 239000004576 sand Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 32
- 239000010687 lubricating oil Substances 0.000 description 11
- 238000005461 lubrication Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 210000004243 sweat Anatomy 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 101150038956 cup-4 gene Proteins 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/166—Cylinder liners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/20—Filtering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses an imitation sweat gland self-compensating lubricating piston for a slurry pump, which comprises a connecting rod sleeve coaxially arranged in a cylinder sleeve, wherein an imitation sweat gland leather cup is sleeved on the connecting rod sleeve, and the outer wall of the imitation sweat gland leather cup is in contact with the inner wall of the cylinder sleeve; the axial rear end of the connecting rod sleeve is coaxially connected with a piston connecting rod; the connecting rod sleeve comprises a body, wherein an inner hole which is opened to the axial rear end of the body is formed in the body; a plurality of fluid channels are uniformly formed on the body along the periphery of the inner hole, and the sweat-like gland leather cup is designed in the invention, and can provide a lubricating film for the surface of a piston by arranging a plurality of micro-capillary holes on the sweat-like gland leather cup, and the axial rear end of the sweat-like gland leather cup is provided with a ring groove, so that the contact area between the sweat-like gland leather cup and a cylinder sleeve is reduced, the friction performance of the piston is improved, meanwhile, the sand impurities between the piston and the inner wall of the cylinder sleeve can be filtered, and the technical problem that the service life of a slurry pump is shorter due to more impurities between the piston and the cylinder sleeve in the prior art is solved.
Description
Technical Field
The invention belongs to the technical field of slurry pumps, and relates to a piston, in particular to an sweat gland imitation self-compensating lubricating piston for a slurry pump.
Background
The slurry pump is one of key equipment for drilling construction, and the slurry pump conveys high-pressure flushing fluid into a hole in the drilling construction process to realize the effects of cooling a drill bit, carrying rock fragments, providing power for a hole bottom drilling tool, assisting rock crushing and the like. The piston is a key component for limiting the service life of the slurry pump, and because the slurry pump piston is generally made of nitrile rubber polyurethane rubber material, under the high pressure and high impulse, the slurry pump piston is influenced by surface friction heat and internal friction heat, rubber molecules can be thermally cracked or thermally crosslinked, the physical property and the wear resistance are reduced, the elastic modulus and the expansion resistance are reduced along with the increase of temperature, and the wear resistance is rapidly reduced beyond a certain temperature, so that the sealing capability of the piston is lost. When the tightness is reduced, sand grains in the slurry easily enter a gap between the piston and the cylinder sleeve, so that the rubber piston is damaged, and the cylinder sleeve is scratched, and the service life of the cylinder sleeve is influenced. Thus, improving piston wear is a key factor in improving mud pump life.
Many researches are made by researchers aiming at the problem of improving the performance of the slurry pump piston, and the research contents are mainly focused on the aspects of materials, structures, forms and the like of the piston, such as: the surface of the piston cup is studied to be high in wear-resistant materials such as vulcanized system elastic rubber; the performance of the assembled piston and the integral piston are researched and compared; the structural advantages of different forms of the piston surface, such as pits, spurs and the like, are studied. However, these structures do not fundamentally solve the problems of abrasion of the piston caused by impurities such as mud sand in the gap between the cylinder sleeve and the piston and the lubrication between the piston and the cylinder sleeve, and further do not solve the problem of short service life of the slurry pump.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the sweat gland imitation self-compensating lubricating piston, which solves the technical problems that impurities between the piston and a cylinder sleeve are more, and the lubrication between the piston and the cylinder sleeve is not durable, so that the service life of a mud pump is shorter in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the sweat gland imitation self-compensating lubricating piston for the slurry pump comprises a connecting rod sleeve coaxially arranged in a cylinder sleeve, wherein a sweat gland imitation leather cup is sleeved on the connecting rod sleeve, and the outer wall of the sweat gland imitation leather cup is in contact with the inner wall of the cylinder sleeve; the axial rear end of the connecting rod sleeve is coaxially connected with a piston connecting rod;
the connecting rod sleeve comprises a body, wherein an inner hole which is opened to the axial rear end of the body is formed in the body; a plurality of fluid channels are uniformly formed on the body along the periphery of the inner hole, and the length direction of each fluid channel is consistent with the radial direction of the inner hole; the axial front end surface of the inner hole is provided with a central through hole which is communicated with the inside of the cylinder sleeve and the inner hole;
the outer wall of the sweat-like gland leather cup is uniformly provided with micro-capillary holes along the circumferential direction, and the length direction of the micro-capillary holes is consistent with the radial direction of the sweat-like gland leather cup; the micro-capillary holes are communicated with the fluid channel of the connecting rod sleeve; the outer wall of the front end of the sweat gland-imitating leather cup is provided with a ring groove, and the outer wall of the sweat gland-imitating leather cup at the axial rear end of the ring groove is uniformly provided with a plurality of hexagonal grooves;
the piston connecting rod comprises a connecting section and a fixing section, the connecting section is arranged at the axial rear end of the body, the inner diameter of the mounting hole is larger than that of the inner hole of the connecting rod sleeve, and a boss arranged at the front end of the fixing section is contacted with the axial rear end face of the sweat gland imitation leather cup;
the axial front end of the inner hole of the connecting rod sleeve is provided with an oil storage sliding sleeve, an oil storage cavity is defined among the oil storage sliding sleeve, the connecting rod sleeve and the piston connecting rod, a spring is arranged in the oil storage cavity, one end of the spring is inserted into a spring mounting hole formed in the rear end of the oil storage sliding sleeve, and the other end of the spring is inserted into a connecting rod inner hole formed in the front end of a connecting section of the piston connecting rod.
The invention also comprises the following technical characteristics:
and a sealing ring is arranged between the outer wall of the oil storage sliding sleeve and the connecting rod sleeve.
The connecting rod sleeve is also in threaded connection with a fixing nut, and the rear end face of the fixing nut is in axial contact with the front end face of the sweat gland imitation leather cup.
The number of the fluid channels is 30-40.
The number of the hexagonal grooves on the outer wall of the sweat gland imitation leather cup is 30-40.
The orifices of the micro-capillary holes are distributed in the corresponding hexagonal grooves.
The sweat gland imitation leather cup has 120-150 micro pores.
The connecting section of the piston connecting rod is in threaded connection with the inner hole of the connecting rod sleeve.
An oil storage ring cavity for communicating the micro-capillary holes and the fluid channel is arranged between the connecting rod sleeve and the sweat gland imitation leather cup.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the invention, the sweat-like gland leather cup is designed, and a plurality of micro-capillary holes are formed in the sweat-like gland leather cup, so that a lubricating film can be provided for the surface of a piston, and the annular groove is formed in the axial rear end of the sweat-like gland leather cup, so that the contact area between the sweat-like gland leather cup and a cylinder sleeve is reduced, the friction performance of the piston is improved, meanwhile, sand impurities between the piston and the inner wall of the cylinder sleeve can be filtered, and the technical problem that the service life of a mud pump is short due to more impurities between the piston and the cylinder sleeve in the prior art is solved.
According to the invention, through the fluid channel and the micro-capillary holes, the lubricating oil in the oil storage cavity can realize continuous lubrication, when the pressure given by the oil storage sliding sleeve in the cylinder sleeve is large, the spring is compressed under the action of the pressure, and further the lubricating oil is provided through the fluid channel and the micro-capillary holes, when the pressure given by the cylinder sleeve is reduced, the spring is reset, and the redundant lubricating oil in the gap between the cylinder sleeve and the sweat-like gland leather cup can be sucked back into the cavity, so that the long-term lubrication of the surface of the piston is ensured, and the technical problem that the service life of a slurry pump is short due to the fact that the lubrication between the piston and the cylinder sleeve is not durable in the prior art is solved.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the link sleeve of the present invention;
FIG. 3 is a schematic diagram of the sweat gland imitation leather cup according to the present invention;
FIG. 4 is a schematic cross-sectional view of the sweat gland imitation leather cup of the present invention;
FIG. 5 is a schematic cross-sectional view of a piston rod of the present invention;
fig. 6 is a schematic cross-sectional view of an oil storage sliding sleeve according to the present invention.
The meaning of each reference numeral in the figures is: the sweat gland imitation leather cup comprises a 1-cylinder sleeve, a 2-connecting rod sleeve, a 3-sweat gland imitation leather cup, a 4-piston connecting rod, a 5-oil storage sliding sleeve, a 6-oil storage cavity, a 7-spring, an 8-spring mounting hole, a 9-sealing ring, a 10-fixing nut and an 11-oil storage annular cavity;
201-body, 202-inner bore, 203-fluid passage, 204-central through bore, 205-mounting bore;
301-micro capillary holes, 302-hexagonal grooves and 303-annular grooves;
401-connecting section, 402-fixing section, 403-boss, 404-connecting rod inner hole.
The following examples illustrate the invention in further detail.
Detailed Description
All parts in the present invention are known in the art, unless otherwise specified.
The following specific embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present invention.
The invention provides an imitation sweat gland self-compensating lubricating piston for a slurry pump, which is shown in figures 1 to 6, and comprises a connecting rod sleeve 2 coaxially arranged in a cylinder sleeve 1, wherein an imitation sweat gland leather cup 3 is sleeved on the connecting rod sleeve 2, and the outer wall of the imitation sweat gland leather cup 3 is in contact with the inner wall of the cylinder sleeve 1; the axial rear end of the connecting rod sleeve 2 is coaxially connected with a piston connecting rod 4;
the connecting rod sleeve 2 comprises a body 201, and an inner hole 202 which is opened to the axial rear end of the body 201 is formed in the body 201; a plurality of fluid channels 203 are uniformly formed on the body along the circumference of the inner hole 202, and the length direction of the fluid channels 203 is consistent with the radial direction of the inner hole 202; a central through hole 204 for communicating the interior of the cylinder sleeve 1 with the inner hole 202 is formed in the axial front end surface of the inner hole 202;
the outer wall of the sweat-like gland leather cup 3 is provided with micro-capillary holes 301 uniformly along the circumferential direction, and the length direction of the micro-capillary holes 301 is consistent with the radial direction of the sweat-like gland leather cup 3; the micro-capillary holes 301 communicate with the fluid channel 203 of the link sleeve 2; the outer wall of the front end of the sweat gland imitation leather cup 3 is provided with a ring groove 303, and the outer wall of the sweat gland imitation leather cup 3 at the axial rear end of the ring groove 303 is uniformly provided with a plurality of hexagonal grooves 302;
the piston connecting rod 4 comprises a connecting section 401 and a fixing section 402, the connecting section 401 is arranged at the axial rear end of the body 201, the inner diameter of the mounting hole 205 is larger than that of the inner hole 202 of the connecting rod sleeve 2, and a boss 403 arranged at the front end of the fixing section 402 is contacted with the axial rear end face of the sweat gland imitation leather cup 3;
the axial front end of the inner hole 202 of the connecting rod sleeve 2 is provided with an oil storage sliding sleeve 5, an oil storage cavity 6 is defined among the oil storage sliding sleeve 5, the connecting rod sleeve 2 and the piston connecting rod 4, a spring 7 is arranged in the oil storage cavity 6, one end of the spring 7 is inserted into a spring mounting hole 8 arranged at the rear end of the oil storage sliding sleeve 5, and the other end is inserted into a connecting rod inner hole 404 arranged at the front end of a connecting section 401 of the piston connecting rod 4.
In the technical scheme, in the action process of the oil storage sliding sleeve 5 and the spring 7, the device and the cylinder sleeve reciprocate each time, the volume of the oil storage cavity 6 is changed through the action of the spring 7, and then the supply and recovery of the lubricating oil film on the outer wall of the sweat gland imitation leather cup 3 are realized once;
when the piston connecting rod 5 pushes the piston to move forwards along the axial direction, the pressure in the cylinder sleeve 1 is increased, the oil storage sliding sleeve is pushed, the spring 7 is compressed by the piston connecting rod 5, and lubricating oil in the oil storage cavity 6 is pressed into the micro-capillary holes 301 of the sweat gland imitation leather cup 3 through the fluid channel 203;
when the piston connecting rod 4 moves right, the pressure in the cylinder sleeve 1 is reduced, the volume in the oil storage cavity is enlarged by the oil storage sliding sleeve 5 under the action of the restoring force of the spring 7, and lubricating oil on the outer wall of the sweat gland imitation leather cup 3 and in the micro capillary holes 403 is sucked back into the oil storage cavity 6, so that self-compensating lubrication is realized.
The sweat-like gland leather cup 3 is designed, a plurality of micro-capillary holes 301 are formed in the sweat-like gland leather cup 3, a lubricating film can be provided for the surface of a piston, and an annular groove 303 is formed in the axial rear end of the sweat-like gland leather cup 301, so that the contact area between the sweat-like gland leather cup 3 and the cylinder sleeve 1 is reduced, the friction performance of the piston is improved, and meanwhile, sand impurities between the piston and the inner wall of the cylinder sleeve 1 can be filtered; solves the technical problem that the service life of the slurry pump is shorter due to more impurities between the leather cup and the cylinder sleeve in the prior art.
Through fluid channel 203 and micro capillary 301 for lubricating oil in the oil storage cavity 6 can realize continuous lubrication, and when the pressure that oil storage sliding sleeve 5 was given in cylinder liner 1 is great, spring 7 compresses under the effect of pressure, and then provides lubricating oil through fluid channel 203 and micro capillary 301, and spring 7 resets when the pressure that cylinder liner 1 gave reduces, can suck back the intracavity with unnecessary lubricating oil in cylinder liner 1 and the imitative sweat gland leather cup 3 clearance again, guarantees the long-term lubrication of piston surface, has solved the technical problem that lubricating between leather cup and the cylinder liner is not lasting to lead to the slush pump life shorter among the prior art.
Specifically, be provided with sealing washer 9 between the outer wall of oil storage sliding sleeve 5 and the connecting rod cover 2, guaranteed oil storage cavity leakproofness.
Specifically, the outside of the connecting rod sleeve 2 is also in threaded connection with a fixing nut 10, and the rear end surface of the fixing nut 10 is in axial contact with the front end surface of the sweat gland imitation leather cup 3, so that the sweat gland imitation leather cup 3 is prevented from moving along the axial direction.
Specifically, 30 to 40 fluid passages 203 are provided.
Preferably, fluid channel 203 has a diameter of 5mm.
Specifically, there are 30-40 hexagonal grooves 302 on the outer wall of the sweat gland imitation leather cup 3.
In the technical scheme, the hexagonal groove design on the surface of the sweat gland-imitated leather cup can greatly reduce the contact area of the leather cup and the cylinder sleeve, and provide a larger oil storage space for the annular gap of the leather cup and the cylinder sleeve, so that the lubricating effect is better.
Specifically, the openings of the micro-capillary holes 301 are distributed in the corresponding hexagonal grooves 302, which is beneficial to the realization of the replenishment and recovery of the lubricating oil film on the surface of the sweat gland imitation leather cup 4.
Specifically, the sweat gland imitation leather cup 3 has 120-150 micro holes 301.
Preferably, the micro-capillaries are 2mm in diameter.
Specifically, the connecting section 401 of the piston connecting rod 4 is in threaded connection with the inner hole 202 of the connecting rod sleeve 2, and the threaded connection is convenient to detach.
Specifically, the oil storage ring cavity 11 which is used for communicating the micro-capillary holes 301 and the fluid channel 203 is arranged between the connecting rod sleeve 2 and the sweat gland imitation leather cup 3, so that efficient circulation of lubricating oil in the oil storage cavity and the sweat gland imitation leather cup can be ensured.
Claims (8)
1. The sweat gland imitation self-compensating lubricating piston for the slurry pump is characterized by comprising a connecting rod sleeve (2) coaxially arranged in a cylinder sleeve (1), wherein a sweat gland imitation leather cup (3) is sleeved on the connecting rod sleeve (2), and the outer wall of the sweat gland imitation leather cup (3) is in contact with the inner wall of the cylinder sleeve (1); the axial rear end of the connecting rod sleeve (2) is coaxially connected with a piston connecting rod (4);
the connecting rod sleeve (2) comprises a body (201), wherein an inner hole (202) which is opened to the axial rear end of the body (201) is formed in the body (201); a plurality of fluid channels (203) are uniformly formed on the body along the circumference of the inner hole (202), and the length direction of the fluid channels (203) is consistent with the radial direction of the inner hole (202); the axial front end surface of the inner hole (202) is provided with a central through hole (204) for communicating the inside of the cylinder sleeve (1) with the inner hole (202);
the outer wall of the sweat-like gland leather cup (3) is provided with micro-capillary holes (301) uniformly along the circumferential direction, and the length direction of the micro-capillary holes (301) is consistent with the radial direction of the sweat-like gland leather cup (3); the micro-capillary holes (301) are communicated with the fluid channel (203) of the connecting rod sleeve (2); the outer wall of the front end of the sweat-like gland leather cup (3) is provided with a ring groove (303), and the outer wall of the sweat-like gland leather cup (3) at the axial rear end of the ring groove (303) is uniformly provided with a plurality of hexagonal grooves (302);
the piston connecting rod (4) comprises a connecting section (401) and a fixing section (402), the connecting section (401) is arranged at the axial rear end of the body (201), the inner diameter of the mounting hole (205) is larger than that of the inner hole (202) of the connecting rod sleeve (2), and a boss (403) arranged at the front end of the fixing section (402) is in contact with the axial rear end face of the sweat gland imitation leather cup (3);
the axial front end of the inner hole (202) of the connecting rod sleeve (2) is provided with an oil storage sliding sleeve (5), an oil storage cavity (6) is defined among the oil storage sliding sleeve (5), the connecting rod sleeve (2) and the piston connecting rod (4), a spring (7) is arranged in the oil storage cavity (6), one end of the spring (7) is inserted into a spring mounting hole (8) arranged at the rear end of the oil storage sliding sleeve (5), and the other end of the spring is inserted into a connecting rod inner hole (404) formed at the front end of a connecting section (401) of the piston connecting rod (4);
an oil storage annular cavity (11) for communicating the micro-capillary holes (301) and the fluid channel (203) is arranged between the connecting rod sleeve (2) and the sweat gland imitation leather cup (3).
2. The sweat gland imitation self-compensating lubricating piston for the slurry pump according to claim 1, wherein a sealing ring (9) is arranged between the outer wall of the oil storage sliding sleeve (5) and the connecting rod sleeve (2).
3. The sweat gland imitation self-compensating lubricating piston for the slurry pump according to claim 1, wherein a fixing nut (10) is further screwed outside the connecting rod sleeve (2), and the rear end surface of the fixing nut (10) is in axial contact with the front end surface of the sweat gland imitation leather cup (3).
4. The sweat gland simulated self-compensating lubricating piston for a slurry pump according to claim 1, wherein 30-40 fluid passages (203) are provided.
5. The sweat gland imitation self-compensating lubricating piston for the slurry pump according to claim 1, wherein the number of hexagonal grooves (302) on the outer wall of the sweat gland imitation leather cup (3) is 30-40.
6. The sweat gland simulated self-compensating lubricating piston for a mud pump as set forth in claim 1, wherein the orifices of said micro-capillaries (301) are distributed in corresponding hexagonal grooves (302).
7. The sweat gland imitation self-compensating lubricating piston for a slurry pump according to claim 1, wherein the sweat gland imitation leather cup (3) has 120-150 micro-capillary holes (301).
8. The sweat gland simulated self-compensating lubricating piston for the slurry pump according to claim 1, wherein the connecting section (401) of the piston connecting rod (4) is in threaded connection with the inner hole (202) of the connecting rod sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210767066.8A CN114992115B (en) | 2022-06-30 | 2022-06-30 | Sweat gland imitation self-compensating lubricating piston for slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210767066.8A CN114992115B (en) | 2022-06-30 | 2022-06-30 | Sweat gland imitation self-compensating lubricating piston for slurry pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114992115A CN114992115A (en) | 2022-09-02 |
| CN114992115B true CN114992115B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210767066.8A Active CN114992115B (en) | 2022-06-30 | 2022-06-30 | Sweat gland imitation self-compensating lubricating piston for slurry pump |
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| CN (1) | CN114992115B (en) |
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| CN109185119A (en) * | 2018-11-12 | 2019-01-11 | 吉林大学 | A kind of bionical piston of BW-250 type slush pump |
| CN112696351A (en) * | 2021-01-07 | 2021-04-23 | 西南石油大学 | Two-stage differential pressure type drilling pump piston assembly |
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2022
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|---|---|---|---|---|
| JP2001355728A (en) * | 2000-06-15 | 2001-12-26 | Mitsubishi Motors Corp | Lubrication structure of piston |
| CN102691654A (en) * | 2012-06-15 | 2012-09-26 | 吉林大学 | Mud pump piston with pits on surface |
| CN202690429U (en) * | 2012-06-15 | 2013-01-23 | 吉林大学 | Mud pump piston with pit form on surface |
| CN102926991A (en) * | 2012-10-26 | 2013-02-13 | 上海鸿得利重工股份有限公司 | Concrete delivery pump piston with self-lubricating structure |
| CN205370958U (en) * | 2016-01-19 | 2016-07-06 | 安徽工业大学 | Plunger for plunger pump with bionical micro -structure surface characteristics |
| CN105736355A (en) * | 2016-04-11 | 2016-07-06 | 青岛力克川液压机械有限公司 | Flow distribution structure based on dynamic pressure balance of flow distribution plate |
| CN107030951A (en) * | 2017-06-15 | 2017-08-11 | 吉林大学 | A kind of bionical casting for piston forming method of slush pump and shaped device |
| CN109185119A (en) * | 2018-11-12 | 2019-01-11 | 吉林大学 | A kind of bionical piston of BW-250 type slush pump |
| CN112696351A (en) * | 2021-01-07 | 2021-04-23 | 西南石油大学 | Two-stage differential pressure type drilling pump piston assembly |
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