CN116025561A - Lubricating structure of plunger pump and plunger pump - Google Patents

Abstract

The invention discloses a lubricating structure of a plunger pump, which comprises an eccentric disc, a star wheel, a sealing bearing and a sliding block, wherein the eccentric disc is rotatably arranged in a pump body of the plunger pump; the star wheel is sleeved on the eccentric disc, two sealing bearings are arranged between the inner peripheral surface of the star wheel and the outer peripheral surface of the eccentric disc, the two sealing bearings are spaced apart in the axial direction of the star wheel, the eccentric disc, the star wheel and the two sealing bearings enclose to form an oil chamber, and the eccentric disc is provided with a first oil inlet channel which is communicated with the oil chamber and the outside; the pump body is provided with a slideway, the sliding block is slidably matched with the slideway and forms a first matching gap, the sliding block is connected with the star wheel in a transmission way, and the sliding block is provided with an oil outlet channel communicated with the oil chamber and the first matching gap. The lubricating structure of the plunger pump provided by the invention has the advantages of small lubricating oil consumption and good lubricating effect.

Description

Lubricating structure of plunger pump and plunger pump

Technical Field

The invention relates to the technical field of plunger pumps, in particular to a lubricating structure of a plunger pump and the plunger pump.

Background

Chinese patent publication No. CN113404682a discloses a radial piston pump in which an oil reservoir is provided on the outer peripheral surface of an eccentric shaft or the inner peripheral surface of a cam, thereby achieving lubrication of lubricating oil in a fit clearance between the two and flow between internal oil passages of the two. However, the lubricating oil is liable to overflow from the above-mentioned mating clearance under the action of the oil pressure. Therefore, the technology has the defects of large lubricating oil consumption and poor lubricating effect.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a lubricating structure of a plunger pump, which has the advantages of small lubricating oil consumption and good lubricating effect.

The embodiment of the invention also provides a plunger pump.

The lubricating structure of the plunger pump comprises an eccentric disc, a star wheel, a sealing bearing and a sliding block, wherein the eccentric disc is rotatably arranged in a pump body of the plunger pump; the star wheel is sleeved on the eccentric disc, two sealing bearings are arranged between the inner peripheral surface of the star wheel and the outer peripheral surface of the eccentric disc, the two sealing bearings are spaced apart in the axial direction of the star wheel, an oil chamber is formed by surrounding the eccentric disc, the star wheel and the two sealing bearings, and the eccentric disc is provided with a first oil inlet channel which is communicated with the oil chamber and the outside; the pump body is provided with a slide way, the sliding block is slidably matched with the slide way and forms a first matching gap with the slide way, the sliding block is connected with the star wheel in a transmission way, and the sliding block is provided with an oil outlet channel communicated with the oil chamber and the first matching gap.

According to the lubricating structure of the plunger pump, lubricating oil enters the oil chamber through the first oil inlet channel, and under the sealing action of the two sealing bearings, the lubricating oil is prevented from overflowing from the oil chamber, in other words, the lubricating oil is prevented from overflowing from the matching area of the eccentric disc and the star wheel. Therefore, the waste of lubricating oil is reduced, the consumption of the lubricating oil is reduced, and the lubricating effect of the lubricating oil on the matching area of the eccentric disc and the star wheel is improved.

In some embodiments, the device further comprises a first pin shaft, a second pin shaft and a connecting rod, wherein the first pin shaft is fixedly arranged on the star wheel; the second pin shaft is fixedly arranged on the sliding block; the two ends of the connecting rod are respectively and pivotally connected with the first pin shaft and the second pin shaft, and the star wheel, the first pin shaft, the connecting rod and the second pin shaft jointly form an oil way for communicating the oil chamber and the oil outlet passage.

In some embodiments, the star wheel is provided with a first mounting groove, a first opening is formed in the first mounting groove towards the end part of the sliding block, the wall of the star wheel for forming the first mounting groove comprises a first side wall and a second side wall, the first side wall and the second side wall are opposite in the axial direction of the star wheel, the first side wall and the second side wall are both provided with a first through hole communicated with the first mounting groove, the first pin shaft is matched in the two first through holes and the first mounting groove, and the first end of the connecting rod is matched in the first mounting groove through the first opening and is pivotally connected with the first pin shaft;

the slider is equipped with the second mounting groove, the second mounting groove orientation the tip of star gear forms the second opening, the slider is used for constituting the wall of second mounting groove includes third lateral wall and fourth lateral wall, the third lateral wall with the fourth lateral wall is in the axial of star gear is relative, just the third lateral wall with the fourth lateral wall all be equipped with the second via hole of second mounting groove intercommunication, the second round pin axle cooperate in two the second via hole with in the second mounting groove, the second end of connecting rod by the second opening cooperation in the second mounting groove and with the second round pin axle pivotably links to each other.

In some embodiments, the first end of the connecting rod is provided with a first through hole coaxial with the first pin shaft, and the first pin shaft is inserted in the first through hole and is pivotally connected with the connecting rod; the second end of the connecting rod is provided with a second through hole coaxial with the second pin shaft, and the second pin shaft is inserted into the second through hole and is connected with the connecting rod in a pivotable manner.

In some embodiments, the oil path includes a first oil path, a second oil path, a third oil path, and a fourth oil path, the first pin and the first via hole form a second fit gap, and the first oil path is opened at the star wheel and communicates the second fit gap with the oil chamber; the first pin shaft and the first through hole form a third fit clearance, and the second oil duct is arranged on the first pin shaft and communicated with the second fit clearance and the third fit clearance; the second pin shaft and the second through hole form a fourth fit clearance, and the third oil duct is arranged on the connecting rod and communicated with the third fit clearance and the fourth fit clearance; the second pin shaft and the second through hole form a fifth fit clearance, the fourth oil duct is arranged on the second pin shaft and communicated with the fourth fit clearance and the fifth fit clearance, and the oil outlet duct is communicated with the fifth fit clearance and the first fit clearance.

In some embodiments, the first oil passage includes a fifth oil passage, a sixth oil passage, and a seventh oil passage, the wall of the star wheel for constituting the first mounting groove further includes a first bottom wall, the first bottom wall and the first opening are opposite in a radial direction of the star wheel, the fifth oil passage is opened at the first bottom wall and extends in an axial direction of the star wheel, and the sixth oil passage extends in the radial direction of the star wheel and communicates the oil chamber and the fifth oil passage; the seventh oil channels are arranged on the first side wall and the second side wall in a separated mode, the two seventh oil channels and the two second fit clearances are in one-to-one correspondence, and the seventh oil channels extend in the radial direction of the star wheel and are communicated with the corresponding second fit clearances and the fifth oil channels.

In some embodiments, the second oil passage includes an eighth oil passage, a ninth oil passage, and a tenth oil passage, the eighth oil passage being coaxially disposed within the first pin; the ninth oil channels and the second fit clearances are equal in number and correspond to each other one by one, and the ninth oil channels extend in the radial direction of the first pin shaft and are communicated with the corresponding second fit clearances and the eighth oil channels; the tenth oil duct extends in the radial direction of the first pin shaft and is communicated with the eighth oil duct in a crossing manner, and two ends of the tenth oil duct are communicated with the third fit clearance.

In some embodiments, the fourth oil passage includes an eleventh oil passage, a twelfth oil passage, and a thirteenth oil passage, the eleventh oil passage being coaxially disposed with the second pin; the twelfth oil duct extends in the radial direction of the second pin shaft and is communicated with the eleventh oil duct in a crossing way, and two ends of the twelfth oil duct are communicated with the fourth fit clearance; the thirteenth oil channels are two and correspond to the fifth fit clearances one by one, extend in the radial direction of the second pin shaft and are communicated with the eleventh oil channels in a crossing mode, and two ends of each thirteenth oil channel are communicated with the corresponding fifth fit clearances.

The plunger pump according to the embodiment of the invention comprises the lubricating structure of the plunger pump according to any one of the embodiments, and further comprises a pump body, a crankshaft, a rotary joint, a gear pump and a pipeline; the crankshaft is rotatably arranged on the pump body, a plurality of lubricating structures are arranged at intervals in the axial direction of the crankshaft, the crankshaft comprises shaft sections corresponding to the lubricating structures one by one, the eccentric discs in the lubricating structures are formed on the corresponding shaft sections, the crankshaft is provided with a main oil duct extending in the axial direction of the crankshaft, and the main oil duct is communicated with each of the first oil inlet ducts of the plurality of lubricating structures; an oil supply port communicated with the outside is formed at any end of the main oil duct, and the rotary joint is arranged at the oil supply port; the gear pump is connected with the rotary joint and is suitable for conveying lubricating oil to the main oil duct through the rotary joint; the pipeline and the lubricating structure are equal in number and in one-to-one correspondence, and the pipeline is connected with the slideway and the gear pump in the corresponding lubricating structure, so that lubricating oil in the slideway flows back to the gear pump through the corresponding pipeline.

According to the plunger pump provided by the embodiment of the invention, the pipeline achieves the effect of recycling lubricating oil, and the phenomenon that the sliding effect of the sliding block is influenced due to accumulation of lubricating oil in the slideway is avoided, so that the reliability of the plunger pump is ensured.

Other technical advantages of the plunger pump according to the embodiment of the present invention are the same as those of the lubrication structure of the plunger pump according to the above embodiment, and will not be described here again.

In some embodiments, the plunger pump further comprises a plurality of crankshaft bearings which are distributed at intervals in the axial direction of the crankshaft, the crankshaft bearings are installed between the crankshaft and the pump body, the crankshaft is provided with second oil inlet channels which extend in the radial direction of the crankshaft, the second oil inlet channels and the crankshaft bearings are equal in number and correspond to each other, and the second oil inlet channels are communicated with the main oil channels and the corresponding crankshaft bearings.

Drawings

Fig. 1 is a schematic view of a lubrication structure of a plunger pump according to an embodiment of the present invention.

Fig. 2 is yet another schematic view of a lubrication structure of a plunger pump according to an embodiment of the present invention.

Reference numerals: 1. star wheels; 11. a first pin; 111. a second oil passage; 1111. an eighth oil passage; 1112. a ninth oil passage; 1113. a tenth oil passage; 12. a first mounting groove; 13. a first oil passage; 131. a fifth oil passage; 132. a sixth oil passage; 133. a seventh oil passage; 2. sealing the bearing; 3. a slide block; 31. an oil outlet duct; 32. a second pin; 321. a fourth oil passage; 3211. an eleventh oil passage; 3212. a twelfth oil passage; 3213. a thirteenth oil passage; 33. a second mounting groove; 4. an oil chamber; 5. a pump body; 51. a slideway; 52. a connecting rod; 521. a third oil passage; 53. a crankshaft; 531. a main oil duct; 532. a first oil inlet duct; 533. the second oil inlet duct; 54. a crankshaft bearing; 55. a plunger; 56. a seal assembly; 6. and (5) rotating the joint.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

A lubrication structure of a plunger pump and a plunger pump according to an embodiment of the present invention are described below with reference to fig. 1 to 2.

As shown in fig. 1, the lubricating structure of the plunger pump according to the embodiment of the invention comprises an eccentric disc, a star wheel 1, a sealing bearing 2 and a sliding block 3, wherein the eccentric disc is rotatably arranged in a pump body 5 of the plunger pump. The star wheel 1 is sleeved on the eccentric disc, two sealing bearings 2 are arranged between the inner peripheral surface of the star wheel 1 and the outer peripheral surface of the eccentric disc, the two sealing bearings 2 are axially spaced apart from each other in the star wheel 1, the eccentric disc, the star wheel 1 and the two sealing bearings 2 are surrounded to form an oil chamber 4, and the eccentric disc is provided with a first oil inlet channel 532 communicated with the oil chamber 4 and the outside. The pump body 5 is provided with a slideway 51, the sliding block 3 is slidably matched with the slideway 51 and forms a first matching gap, the sliding block 3 is in transmission connection with the star wheel 1, and the sliding block 3 is provided with an oil outlet channel 31 which is communicated with the oil chamber 4 and the first matching gap.

According to the lubricating structure of the plunger pump, when the eccentric disc rotates, the star wheel 1 is driven to swing under the action of the sealing bearing 2, and the star wheel 1 drives the sliding block 3 to slide in the slide way 51, so that the suction and the discharge of fluid in the slide way 51 are realized, and the operation of the plunger pump is realized.

At the same time, the lubricating oil enters the oil chamber 4 through the first oil inlet passage 532, and under the sealing action of the two seal bearings 2, the lubricating oil is prevented from overflowing from the oil chamber 4, in other words, from the mating region of the eccentric disc and the star wheel 1. Therefore, the waste of lubricating oil is reduced, the consumption of the lubricating oil is reduced, and the lubricating effect of the lubricating oil on the matching area of the eccentric disc and the star wheel 1 is improved.

Wherein the lubricating oil of the oil chamber 4 enters the first fit clearance through the oil outlet passage 31, thereby achieving lubrication of the slider 3 and the slideway 51.

Specifically, the first oil intake passages 532 are plural and equally spaced in the circumferential direction of the eccentric disc.

In some embodiments, as shown in fig. 1, the device further includes a first pin 11, a second pin 32, and a connecting rod 52, where the first pin 11 is fixed to the star wheel 1. The second pin 32 is fixed to the slider 3. The two ends of the connecting rod 52 are respectively and pivotally connected with the first pin 11 and the second pin 32, and the star wheel 1, the first pin 11, the connecting rod 52 and the second pin 32 together form an oil path for communicating the oil chamber 4 and the oil outlet channel 31.

Therefore, the swinging star wheel 1 drives the connecting rod 52 to do plane motion through the first pin shaft 11, and the connecting rod 52 drives the sliding block 3 to slide in the slideway 51 through the second pin shaft 32. In addition, the lubricating oil in the oil chamber 4 enters the oil outlet passage 31 through the oil passage.

It will be appreciated that the first pin 11, the link 52, the second pin 32, the slider 3 and the slideway 51 constitute an actuator which is plural and equally spaced in the circumferential direction of the star wheel 1.

In some embodiments, as shown in fig. 1, the star wheel 1 is provided with a first mounting groove 12, the first mounting groove 12 forms a first opening towards the end of the slider 3, the wall of the star wheel 1 for forming the first mounting groove 12 comprises a first side wall and a second side wall, the first side wall and the second side wall are opposite in the axial direction of the star wheel 1, the first side wall and the second side wall are respectively provided with a first through hole communicated with the first mounting groove 12, a first pin 11 is matched in the two first through holes and the first mounting groove 12, and a first end of the connecting rod 52 is matched in the first mounting groove 12 through the first opening and is pivotally connected with the first pin 11.

The slider 3 is provided with a second mounting groove 33, the second mounting groove 33 forming a second opening towards the end of the star wheel 1, the wall of the slider 3 for constituting the second mounting groove 33 comprising a third side wall and a fourth side wall, the third side wall and the fourth side wall being at the axis of the star wheel 1

And the third side wall and the fourth side wall are respectively provided with a second through hole communicated with the second mounting groove 33, the second pin shaft 325 is matched in the two second through holes and the second mounting groove 33, and the second end of the connecting rod 52 is matched with the second mounting groove 33 through a second opening and is pivotally connected with the second pin shaft 32.

Thus, two first vias define the mounting location of the first pin 11 and two second vias define the mounting location of the second pin 32. The first mounting slot 12 defines a seating position for a first end of the link 52 and the second mounting slot 33 defines a seating position for a second end of the link 52.

0 it will be appreciated that the two first vias are coaxially arranged and that the axes of both first vias extend in the axial direction of the star wheel 1.

It will be appreciated that the two second vias are coaxially arranged and that the axes of both second vias extend in the axial direction of the star wheel 1.

In some embodiments, as shown in fig. 1, a first end of the link 52 is provided with a first through hole coaxial with the first pin 11, and the first pin 11 is inserted into the first through hole and is pivotally connected to the link 52; the second end of the connecting rod 52 is provided with a first end

The second pin 32 is coaxial with the second through hole, and the second pin 32 is inserted into the second through hole and is pivotally connected with the link 52. 5 thereby, the effect that both ends of the link 52 are pivotally connected to the first pin 11 and the second pin 32, respectively, is achieved.

As can be appreciated, the connecting rod 52 is sleeved on the first pin 11 through the first through hole.

It is understood that the connecting rod 52 is sleeved on the second pin shaft 32 through the second through hole.

In some embodiments, as shown in FIG. 1, the oil path includes a first oil path 13, a second oil path 111, and a third oil path 521

And the fourth oil duct 321, the first pin 11 and the first via hole form a second fit clearance, and the first oil duct 13 is formed in the star wheel 10 and communicates the second fit clearance with the oil chamber 4. The first pin 11 and the first through hole form a third fit clearance, and the second oil passage 111

And the second fit clearance is communicated with the third fit clearance by being arranged on the first pin shaft 11. The second pin 32 and the second through hole form a fourth fit gap, and the third oil passage 521 is formed in the connecting rod 52 and communicates with the third fit gap and the fourth fit gap. The second pin shaft 32 and the second through hole form a fifth fit gap, the fourth oil duct 321 is arranged on the second pin shaft 32 and communicated with the fourth fit gap and the fifth fit gap, and the oil outlet channel 31 is communicated with the fifth fit gap and the first fit gap.

5, the lubricating oil in the oil chamber 4 first enters the second fit-in gap through the first oil passage 13, and is then discharged into the second fit-in gap

A first oil film is formed which surrounds the circumferential surface of the first pin 11 and effects lubrication of the first pin 11 and the first via.

Next, the lubricating oil in the second fit-up gap enters the third fit-up gap through the second oil passage 111, where

A second oil film is formed. The second oil film surrounds the peripheral surface of the first pin 11 and lubricates the first pin 11 and the first through hole. 0 then, the lubricating oil in the third fit-up gap enters the fourth fit-up gap through the third oil passage 521, where

A third oil film is formed which surrounds the circumferential surface of the second pin 32 and effects lubrication of the second pin 32 and the second through hole.

Again, the lubricating oil in the fourth fit gap enters the fifth fit gap through the fourth oil passage 321, and a fourth oil film is formed in the fifth fit gap, surrounds the peripheral surface of the second pin shaft 32, and lubricates the second pin shaft 32 and the second via hole.

Finally, the lubricating oil in the fifth fit clearance enters the first fit clearance through the oil outlet passage 31, so that lubrication of the sliding block 3 and the slideway 51 is realized.

Specifically, the third oil passage 521 extends in the length direction of the connecting rod 52.

In some embodiments, as shown in fig. 1 and 2, the first oil passage 13 includes a fifth oil passage 131, a sixth oil passage 132, and a seventh oil passage 133, the wall of the star wheel 1 for constituting the first mounting groove 12 further includes a first bottom wall, the first bottom wall and the first opening being opposite in the radial direction of the star wheel 1, the fifth oil passage 131 is open at the first bottom wall and extends in the axial direction of the star wheel 1, and the sixth oil passage 132 extends in the radial direction of the star wheel 1 and communicates with the oil chamber 4 and the fifth oil passage 131. The seventh oil channels 133 are two and are respectively arranged on the first side wall and the second side wall, the two seventh oil channels 133 and the two second fit clearances are in one-to-one correspondence, and the seventh oil channels 133 extend in the radial direction of the star wheel 1 and are communicated with the corresponding second fit clearances and the fifth oil channel 131.

Thus, the lubricating oil in the oil chamber 4 enters the fifth oil passage 131 through the sixth oil passage 132, then enters the two seventh oil passages 133 through the fifth oil passage 131, and then enters the second fit gap through the seventh oil passage 133, thereby realizing lubrication of the second fit gap.

Specifically, the sixth oil passage 132 is provided in the middle of the fifth oil passage 131 in the axial direction thereof.

Preferably, the two ends of the fifth oil duct 131 respectively penetrate through the first bottom wall, and the lubrication structure further comprises a first screw plug, and the first screw plug has two ends and is respectively mounted at the two ends of the fifth oil duct 131.

The design is convenient for set up fifth oil duct 131 on first diapire like this, and in addition, two first screw plugs are used for blockking up the both ends of fifth oil duct 131, avoid lubricating oil to spill over from the tip of fifth oil duct 131.

In some embodiments, as shown in fig. 1 and 2, the second oil passage 111 includes an eighth oil passage 1111, a ninth oil passage 1112, and a tenth oil passage 1113, and the eighth oil passage 1111 is coaxially provided within the first pin 11. The ninth oil passage 1112 and the second fitting clearance are equal in number and correspond one to one, and the ninth oil passage 1112 extends in the radial direction of the first pin 11 and communicates with the respective second fitting clearance and the eighth oil passage 1111. The tenth oil passage 1113 extends in the radial direction of the first pin 11 and is in cross communication with the eighth oil passage 1111, and both ends of the tenth oil passage 1113 are in communication with the third fitting clearance.

Thus, the lubricating oil in the second fit-up gap enters the eighth oil passage 1111 through the ninth oil passage 1112, enters the tenth oil passage 1113 through the eighth oil passage 1111, and enters the third fit-up gap through the tenth oil passage 1113, thereby achieving lubrication of the third fit-up gap.

Preferably, the two ends of the eighth oil duct 1111 respectively penetrate the first pin shaft 11, and the lubrication structure further includes two second plugs, which are respectively installed at the two ends of the eighth oil duct 1111.

The eighth oil duct 1111 is conveniently arranged on the first pin 11, and in addition, the two second screw plugs are used for blocking two ends of the eighth oil duct 1111, so that lubricating oil is prevented from overflowing from the end of the eighth oil duct 1111.

In some embodiments, as shown in fig. 1 and 2, the fourth oil passage 321 includes an eleventh oil passage 3211, a twelfth oil passage 3212, and a thirteenth oil passage 3213, and the eleventh oil passage 3211 is coaxially provided at the second pin 32. The twelfth oil passage 3212 extends in the radial direction of the second pin 32 and is in cross communication with the eleventh oil passage 3211, and both ends of the twelfth oil passage 3212 are in communication with the fourth fit gap. The thirteenth oil channels 3213 are two and correspond to the two fifth fit clearances one by one, the thirteenth oil channels 3213 extend in the radial direction of the second pin shaft 32 and are communicated with the eleventh oil channels 3211 in a crossing manner, and two ends of the thirteenth oil channels 3213 are communicated with the corresponding fifth fit clearances.

Thus, the lubricating oil in the fourth fit-up gap enters the eleventh oil passage 3211 through the twelfth oil passage 3212, enters the thirteenth oil passage 3213 through the eleventh oil passage 3211, and enters the fifth fit-up gap through the thirteenth oil passage 3213. Thereby achieving lubrication of the fifth mating gap.

The lubrication structure further includes a plunger 55 and a seal assembly 56, wherein the plunger 55 is located in the slide 51 and is connected to the slider 3. The seal assembly 56 is fixedly arranged on the slideway 51 and separates the slideway 51 into a first cavity and a second cavity, the first cavity is communicated with the oil outlet channel 31, the plunger 55 is slidably inserted in the seal assembly 56, and the pump body 5 is provided with a water chamber communicated with the second cavity.

Thus, the seal assembly 56 serves to isolate the lubrication oil in the first chamber from the water in the second chamber, thereby avoiding mixing of the lubrication oil and water and ensuring the purity of the lubrication oil.

As shown in fig. 1, the plunger pump according to the embodiment of the present invention includes the lubrication structure of the plunger pump in any of the above embodiments, and further includes a pump body 5, a crankshaft 53, a rotary joint 6, a gear pump, and a pipe. The crankshaft 53 is rotatably mounted to the pump body 5, the lubrication structure is plural and is spaced apart in the axial direction of the crankshaft 53, the crankshaft 53 includes shaft sections in one-to-one correspondence with the lubrication structure, eccentric discs in the lubrication structure are formed in the respective shaft sections, the crankshaft 53 is provided with a main oil duct 531 extending in the axial direction thereof, and the main oil duct 531 communicates with each of the first oil intake ducts 532 of the plural lubrication structures. Either end of the main oil duct 531 constitutes an oil supply port communicating with the outside, and the rotary joint 6 is mounted to the oil supply port. The gear pump is connected to the rotary joint 6 and is adapted to feed lubricating oil to the main oil duct 531 via the rotary joint 6. The number of the pipelines and the number of the lubricating structures are equal and correspond to each other one by one, and the pipelines are connected with the slide ways 51 and the gear pumps in the corresponding lubricating structures so that lubricating oil in the slide ways 51 flows back to the gear pumps through the corresponding pipelines.

From this, rotary joint 6 is used for connecting main oil duct 531 and gear pump, and the gear pump is used for to main oil duct 531 pump sending lubricating oil, and the lubricating oil of main oil duct 531 gets into oil chamber 4 through a plurality of first oil inlet channels 532, from this is convenient for get into a plurality of lubrication structure simultaneously, realizes the synchronous lubrication to plunger pump work part.

In addition, the pipeline achieves the effect of recycling lubricating oil, and the phenomenon that the sliding effect of the sliding block 3 is affected due to accumulation of lubricating oil in the sliding way 51 is avoided, so that the reliability of the plunger pump is guaranteed.

Other technical advantages of the plunger pump according to the embodiment of the present invention are the same as those of the lubrication structure of the plunger pump according to the above embodiment, and will not be described here again.

Specifically, there are two lubrication structures.

The rotary joint 6 is a quick rotary joint, and the quick rotary joint is connected with the oil supply port through threads.

In some embodiments, as shown in fig. 1, the plunger pump further includes a plurality of crankshaft bearings 54, the crankshaft bearings 54 being spaced apart in an axial direction of the crankshaft 53, the crankshaft bearings 54 being installed between the crankshaft 53 and the pump body 5, the crankshaft 53 being provided with second oil intake passages 533 extending in a radial direction thereof, the second oil intake passages 533 and the crankshaft bearings 54 being equal in number and in one-to-one correspondence, the second oil intake passages 533 communicating the main oil passage 531 with the respective crankshaft bearings 54.

Thereby, the lubricating oil of the main oil passage 531 enters the crank bearing 54 through the second oil intake passage 533, and lubrication of the crank bearing 54 is achieved.

Specifically, the crankshaft bearings 54 are two and are disposed on either side of the two lubrication structures.

In addition, by the size design of the main oil duct 531, the type selection of the gear pump, and the adjustment of the rotation speed, the oil pressure and flow rate of the lubricating oil can be effectively controlled.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (10)

1. A lubrication structure of a plunger pump, comprising:

the eccentric disc is rotatably arranged in the pump body of the plunger pump;

the star wheel is sleeved on the eccentric disc, two seal bearings are arranged between the inner peripheral surface of the star wheel and the outer peripheral surface of the eccentric disc, the two seal bearings are spaced apart in the axial direction of the star wheel, an oil chamber is formed by surrounding the eccentric disc, the star wheel and the two seal bearings, and the eccentric disc is provided with a first oil inlet channel communicated with the oil chamber and the outside; and

the sliding block is provided with a slideway, the sliding block is slidably matched with the slideway and forms a first matching gap with the slideway, the sliding block is connected with the star wheel in a transmission way, and the sliding block is provided with an oil outlet channel communicated with the oil chamber and the first matching gap.

2. The lubrication structure of a plunger pump according to claim 1, further comprising:

the first pin shaft is fixedly arranged on the star wheel;

the second pin shaft is fixedly arranged on the sliding block; and

the two ends of the connecting rod are respectively and pivotally connected with the first pin shaft and the second pin shaft, and the star wheel, the first pin shaft, the connecting rod and the second pin shaft jointly form an oil way for communicating the oil chamber and the oil outlet passage.

3. The lubrication structure of a plunger pump according to claim 2, wherein the star wheel is provided with a first mounting groove forming a first opening toward an end of the slider, a wall of the star wheel for constituting the first mounting groove includes a first side wall and a second side wall, the first side wall and the second side wall are opposite in an axial direction of the star wheel, and each of the first side wall and the second side wall is provided with a first through hole communicating with the first mounting groove, the first pin is fitted into the two first through holes and the first mounting groove, and a first end of the link is fitted into the first mounting groove by the first opening and pivotably connected to the first pin;

the slider is equipped with the second mounting groove, the second mounting groove orientation the tip of star gear forms the second opening, the slider is used for constituting the wall of second mounting groove includes third lateral wall and fourth lateral wall, the third lateral wall with the fourth lateral wall is in the axial of star gear is relative, just the third lateral wall with the fourth lateral wall all be equipped with the second via hole of second mounting groove intercommunication, the second round pin axle cooperate in two the second via hole with in the second mounting groove, the second end of connecting rod by the second opening cooperation in the second mounting groove and with the second round pin axle pivotably links to each other.

4. A lubrication structure of a plunger pump according to claim 3, wherein a first end of the connecting rod is provided with a first through hole coaxial with the first pin shaft, and the first pin shaft is inserted into the first through hole and is pivotally connected with the connecting rod; the second end of the connecting rod is provided with a second through hole coaxial with the second pin shaft, and the second pin shaft is inserted into the second through hole and is connected with the connecting rod in a pivotable manner.

5. The lubrication structure of a plunger pump according to claim 4, wherein the oil passage includes:

the first pin shaft and the first through hole form a second fit clearance, and the first oil passage is arranged on the star wheel and is communicated with the second fit clearance and the oil chamber;

the first pin shaft and the first through hole form a third fit clearance, and the second oil passage is arranged on the first pin shaft and communicated with the second fit clearance and the third fit clearance;

the second pin shaft and the second through hole form a fourth fit clearance, and the third oil passage is arranged on the connecting rod and communicated with the third fit clearance and the fourth fit clearance; and

the fourth oil duct, the second round pin axle with the second via hole forms the fifth fit clearance, the fourth oil duct is seted up in the second round pin axle and intercommunication fourth fit clearance with the fifth fit clearance, go out the oil duct intercommunication fifth fit clearance with first fit clearance.

6. The lubrication structure of a plunger pump according to claim 5, wherein the first oil passage includes:

the star wheel is used for forming the wall of the first mounting groove and further comprises a first bottom wall, the first bottom wall and the first opening are opposite in the radial direction of the star wheel, the fifth oil duct is arranged on the first bottom wall and extends in the axial direction of the star wheel, and the sixth oil duct extends in the radial direction of the star wheel and is communicated with the oil chamber and the fifth oil duct; and

the seventh oil channels are arranged on the first side wall and the second side wall in a separated mode, the two seventh oil channels and the two second fit clearances are in one-to-one correspondence, and the seventh oil channels extend in the radial direction of the star wheel and are communicated with the corresponding second fit clearances and the fifth oil channels.

7. The lubrication structure of a plunger pump according to claim 6, wherein the second oil passage includes:

the eighth oil duct is coaxially arranged in the first pin shaft;

the ninth oil channels are equal in number and in one-to-one correspondence with the second fit clearances, extend in the radial direction of the first pin shaft and are communicated with the corresponding second fit clearances and the eighth oil channels; and

and the tenth oil duct extends in the radial direction of the first pin shaft and is communicated with the eighth oil duct in a crossing way, and two ends of the tenth oil duct are communicated with the third fit clearance.

8. The lubrication structure of a plunger pump according to claim 5, wherein the fourth oil passage includes:

the eleventh oil duct is coaxially arranged on the second pin shaft;

a twelfth oil passage extending in the radial direction of the second pin shaft and communicating with the eleventh oil passage in a crossing manner, both ends of the twelfth oil passage communicating with the fourth fit clearance; and

the thirteenth oil channels are two and correspond to the fifth fit clearances one by one, extend in the radial direction of the second pin shaft and are communicated with the eleventh oil channels in a crossing mode, and two ends of each thirteenth oil channel are communicated with the corresponding fifth fit clearances.

9. A plunger pump comprising the lubrication structure of the plunger pump according to any one of claims 1 to 8, further comprising:

a pump body;

the crankshaft is rotatably mounted on the pump body, a plurality of lubricating structures are distributed at intervals in the axial direction of the crankshaft, the crankshaft comprises shaft sections corresponding to the lubricating structures one by one, the eccentric discs in the lubricating structures are formed on the corresponding shaft sections, the crankshaft is provided with a main oil duct extending in the axial direction of the crankshaft, and the main oil duct is communicated with each of the first oil inlet ducts of the plurality of lubricating structures;

the rotary joint is arranged at the oil supply port;

the gear pump is connected with the rotary joint and is suitable for conveying lubricating oil to the main oil duct through the rotary joint; and

the pipelines are equal in number and in one-to-one correspondence with the lubricating structures, and are connected with the slide ways and the gear pumps in the corresponding lubricating structures, so that lubricating oil in the slide ways flows back to the gear pumps through the corresponding pipelines.

10. The plunger pump according to claim 9, further comprising a plurality of crankshaft bearings which are spaced apart in an axial direction of the crankshaft, the crankshaft bearings being installed between the crankshaft and the pump body, the crankshaft being provided with second oil intake passages extending in a radial direction thereof, the second oil intake passages being equal in number and in one-to-one correspondence with the crankshaft bearings, the second oil intake passages communicating the main oil passage and the respective crankshaft bearings.

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