CN213928723U - Lubricating system for plunger pump and plunger pump - Google Patents

Abstract

A lubrication system for a plunger pump and a plunger pump. In the lubricating system for the plunger pump, the plunger pump includes a first housing, a rotating shaft, and an eccentric wheel; this a lubrication system for plunger pump includes: a first oil pipe configured to input lubricating oil; the first oil conveying channel is positioned in the rotating shaft and extends along the axial direction of the rotating shaft; the second oil conveying channel is positioned in the rotating shaft; the third oil delivery channel is positioned in the eccentric wheel, and the first oil pipe is connected with the first oil delivery channel; one end of the second oil delivery channel is connected with the first oil delivery channel, and the other end of the second oil delivery channel is positioned on the outer surface of the rotating shaft; one end of the third oil delivery channel is connected with the second oil delivery channel, and the other end of the third oil delivery channel is positioned on the outer surface of the eccentric wheel. Therefore, the lubricating system can fully lubricate and cool parts of the plunger pump, improve the utilization rate of lubricating oil and prolong the service life of the parts.

Description

Lubricating system for plunger pump and plunger pump

Technical Field

Embodiments of the present disclosure relate to a lubrication system for a plunger pump and a plunger pump.

Background

The fracturing technology is a technology which makes the oil-gas layer form cracks by utilizing the hydraulic action in the oil extraction or gas production process. The fracturing technology enables the oil-gas layer to form cracks, so that the flowing environment of oil or natural gas underground can be improved, and the yield of an oil well is increased. Therefore, the fracturing technology can be applied to the development of unconventional oil and gas and shale oil and gas. On the other hand, with the further development of unconventional oil gas and shale oil gas, the operation condition of the fracturing operation is more and more complex, so that the requirement on the fracturing equipment, particularly a plunger pump, is higher and higher.

The plunger pump lubricating system is one of important components of the plunger pump, can effectively protect parts from being damaged, prolongs the service life of the parts, and plays a very important role in ensuring the performance of the plunger pump. Good lubrication can not only reduce the frictional resistance of moving parts and reduce abrasion, but also clean the friction surface and take away heat and impurities generated by friction, thereby prolonging the service life of the plunger pump.

SUMMERY OF THE UTILITY MODEL

The disclosed embodiments provide a lubrication system for a plunger pump and the plunger pump. In the lubrication system for a plunger pump, the plunger pump includes a first housing for forming a first cavity; the rotating shaft is positioned in the first cavity; the eccentric wheel is connected with the rotating shaft; at this time, the lubrication system for a plunger pump includes: a first oil pipe configured to input lubricating oil; the first oil conveying channel is positioned in the rotating shaft and extends along the axial direction of the rotating shaft; the second oil conveying channel is positioned in the rotating shaft; the third oil delivery channel is positioned in the eccentric wheel; the first oil pipe is connected with the first oil transportation channel; one end of the second oil delivery channel is connected with the first oil delivery channel, and the other end of the second oil delivery channel is positioned on the outer surface of the rotating shaft; one end of the third oil delivery channel is connected with the second oil delivery channel, and the other end of the third oil delivery channel is positioned on the outer surface of the eccentric wheel. Therefore, the lubricating system can establish a continuous through internal lubricating oil path in the parts by opening the oil delivery channel in the parts of the plunger pump, so that the parts can be fully lubricated and cooled, the lubricating oil utilization rate is improved, and the service lives of the parts are prolonged.

At least one embodiment of the present disclosure provides a lubrication system for a plunger pump including a first housing for forming a first cavity; the rotating shaft is positioned in the first cavity; and an eccentric wheel connected to the rotating shaft, the lubricating system including: a first oil pipe configured to input lubricating oil; the first oil conveying channel is positioned in the rotating shaft and extends along the axial direction of the rotating shaft; the second oil conveying channel is positioned in the rotating shaft; the third oil delivery channel is positioned in the eccentric wheel; the first oil pipe is connected with the first oil transportation channel; one end of the second oil conveying channel is connected with the first oil conveying channel, and the other end of the second oil conveying channel is positioned on the outer surface of the rotating shaft; one end of the third oil delivery channel is connected with the second oil delivery channel, and the other end of the third oil delivery channel is positioned on the outer surface of the eccentric wheel.

For example, in a lubrication system for a plunger pump according to an embodiment of the present disclosure, the second oil delivery passage extends in a radial direction of the rotating shaft and extends to an outer surface of the rotating shaft, and the third oil delivery passage extends in a radial direction of the eccentric to an outer surface of the eccentric.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the plunger pump further includes a bearing provided on the rotating shaft and located on one side of the eccentric wheel in an axial direction of the rotating shaft, and the lubrication system further includes: and the first oil hole is positioned in the eccentric wheel, one end of the first oil hole is positioned in the third oil delivery channel, and the other end of the first oil hole is positioned on the side surface, facing the bearing, of the eccentric wheel.

For example, an embodiment of the present disclosure provides a lubrication system for a plunger pump, further including: and the oil storage tank is positioned on one side of the eccentric wheel close to the rotating shaft and is respectively connected with the second oil conveying channel and the third oil conveying channel.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the plunger pump includes a plurality of eccentric wheels spaced apart from each other on a rotating shaft, and the lubrication system includes: the oil pump comprises a plurality of second oil delivery channel groups and a plurality of third oil delivery channel groups, wherein each second oil delivery channel group comprises at least one second oil delivery channel, each third oil delivery channel group comprises at least one third oil delivery channel, the second oil delivery channel groups are arranged at intervals in the axial direction of the rotating shaft, the third oil delivery channel groups are arranged in one-to-one correspondence with the eccentric wheels, and the second oil delivery channel groups are arranged in one-to-one correspondence with the third oil delivery channel groups.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, each of the second oil delivery passage sets includes two of the second oil delivery passages, an included angle between extending directions of the two of the second oil delivery passages ranges from 110 degrees to 160 degrees, each of the third oil delivery passage sets includes two of the third oil delivery passages, and an included angle between extending directions of the two of the third oil delivery passages ranges from 110 degrees to 160 degrees.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the plunger pump further includes a connecting rod bushing and a connecting rod, the connecting rod includes a connecting rod large head, a connecting rod small head and a connecting rod body connecting the connecting rod large head and the connecting rod small head, the connecting rod bushing is mounted inside the connecting rod large head, the connecting rod bushing is sleeved on the eccentric wheel, and the lubrication system includes: and the second oil hole is positioned in the connecting rod bearing bush and penetrates through the connecting rod bearing bush.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the plunger pump further includes a crosshead pin shaft, the connecting rod small end sleeve is disposed on the crosshead pin shaft, and the lubrication system further includes: and the fourth oil delivery channel is positioned in the connecting rod body, one end of the fourth oil delivery channel is connected with the connecting rod bearing bush, and the other end of the fourth oil delivery channel is connected with a crosshead pin shaft.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the plunger pump further includes a crosshead pin bearing bush that is sleeved on the connecting rod small end; the crosshead is connected with the crosshead pin shaft bushing; and a crosshead slide sleeve, the crosshead disposed within the crosshead slide sleeve, the lubrication system further comprising: the third oil hole is positioned in the crosshead pin shaft; and the fourth oil hole is positioned in the small end of the connecting rod, the third oil hole radially penetrates through the crosshead pin shaft along the crosshead pin shaft, one end of the third oil hole is connected with the fourth oil delivery channel, the other end of the third oil hole is connected with the inner surface of the crosshead pin shaft, one end of the fourth oil hole is connected with the outer surface of the crosshead pin shaft, and the other end of the fourth oil hole is connected with the crosshead pin shaft tile.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the plunger pump further includes a second housing for forming a second cavity, the second cavity being in communication with the first cavity, the second cavity being configured to accommodate a crosshead, and the lubrication system further includes: the first oil inlet is positioned on the second shell and is communicated with the second cavity; and one end of the second oil pipe is connected with the first oil pipe, and the other end of the second oil pipe is connected with the first oil inlet.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the second housing includes a plurality of second cavities therein, the lubrication system further includes a plurality of second oil pipes, and the plurality of second oil pipes are disposed in one-to-one correspondence with the plurality of second cavities.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the lubrication system further includes: a fifth oil delivery passage connecting the plurality of second chambers; a second oil inlet located at a first side of the second housing; the third oil inlet is positioned on the second side of the second shell, and the first side and the second side are arranged along the axial direction of the rotating shaft; one end of the third oil pipe is connected with the first oil pipe, and the other end of the third oil pipe is connected with the second oil inlet; and one end of the fourth oil pipe is connected with the first oil pipe, the other end of the fourth oil pipe is connected with the third oil inlet, one end of the fifth oil transportation channel is connected with the second oil inlet, and the other end of the fifth oil transportation channel is connected with the third oil inlet.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, the plunger pump further includes a gear box, and the lubrication system further includes: the fourth oil inlet is positioned on the shell of the gearbox; and one end of the fifth oil pipe is connected with the first oil pipe, and the other end of the fifth oil pipe is connected with the fourth oil inlet.

For example, in a lubrication system for a plunger pump provided in an embodiment of the present disclosure, a housing of the gear box includes: the sixth oil conveying channel is connected with the fourth oil inlet; and one end of the fifth oil hole is connected with the sixth oil conveying channel, and the other end of the fifth oil hole is connected with the cavity for accommodating the gear pair.

For example, an embodiment of the present disclosure provides a lubrication system for a plunger pump, further including: and the oil supply device comprises a lubricating oil pump, and is connected with the first oil pipe and configured to pump lubricating oil into the first oil pipe.

At least one embodiment of the present disclosure also provides a plunger pump including the lubrication system of any one of the above.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

FIG. 1 is a schematic illustration of a lubrication system for a plunger pump according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a lubrication system for a plunger pump according to an embodiment of the present disclosure;

fig. 3A is a schematic view of an eccentric for use in a lubrication system of a plunger pump according to an embodiment of the present disclosure;

fig. 3B is a schematic cross-sectional view of an eccentric for use in a lubrication system of a plunger pump according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a lubrication system for a plunger pump according to an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of another lubrication system for a plunger pump according to an embodiment of the present disclosure;

6A-6B are schematic cross-sectional views of a housing of a gearbox according to an embodiment of the present disclosure; and

fig. 7 is a schematic diagram of a plunger pump according to an embodiment of the disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

In a conventional lubricating system for a plunger pump, since there are many parts to be lubricated, a plurality of lubricating apparatuses each including at least one lubricating oil pump are required, which leads to an increase in cost and an increase in maintenance difficulty.

In this regard, embodiments of the present disclosure provide a lubrication system for a plunger pump and a plunger pump. In the lubrication system for a plunger pump, the plunger pump includes a first housing for forming a first cavity; the rotating shaft is positioned in the first cavity; the eccentric wheel is connected with the rotating shaft; at this time, the lubrication system for a plunger pump includes: a first oil pipe configured to input lubricating oil; the first oil conveying channel is positioned in the rotating shaft and extends along the axial direction of the rotating shaft; the second oil conveying channel is positioned in the rotating shaft; the third oil delivery channel is positioned in the eccentric wheel, and the oil supply device is configured to supply lubricating oil to the first oil pipe which is connected with the first oil delivery channel; one end of the second oil delivery channel is connected with the first oil delivery channel, and the other end of the second oil delivery channel is positioned on the outer surface of the rotating shaft; one end of the third oil delivery channel is connected with the second oil delivery channel, and the other end of the third oil delivery channel is positioned on the outer surface of the eccentric wheel. Therefore, the lubricating system can establish a continuous through internal lubricating oil path in the parts by opening the oil delivery channel in the parts of the plunger pump, so that the parts can be fully lubricated and cooled, the lubricating oil utilization rate is improved, and the service lives of the parts are prolonged.

The following describes a lubrication system for a plunger pump and the plunger pump provided in the embodiments of the present disclosure in detail with reference to the drawings.

An embodiment of the present disclosure provides a lubrication system for a plunger pump. FIG. 1 is a schematic illustration of a lubrication system for a plunger pump according to an embodiment of the present disclosure; FIG. 2 is a schematic cross-sectional view of a lubrication system for a plunger pump according to an embodiment of the present disclosure; fig. 3A is a schematic view of an eccentric for use in a lubrication system of a plunger pump according to an embodiment of the present disclosure; fig. 3B is a schematic cross-sectional view of an eccentric wheel in a lubrication system for a plunger pump according to an embodiment of the present disclosure.

As shown in fig. 1 and 2, in the lubrication system for a plunger pump, the plunger pump 100 includes a first housing 111, a rotating shaft 120, and an eccentric 130; the first housing 111 is used for forming a first cavity 210, and the first cavity 210 is formed inside the first housing 111; the shaft 120 is located in the first cavity 210, and the shaft 120 can rotate around the axis thereof; the eccentric wheel 130 is connected to the rotating shaft 120 and rotates by the rotating shaft 120. The lubrication system 300 may include a first oil pipe 320, a first oil delivery passage 331, a second oil delivery passage 332, and a third oil delivery passage 333; first oil pipe 320 is configured to input lubricating oil; the first oil delivery passage 331 is located in the rotation shaft 120 and extends along the axial direction of the rotation shaft 120; a second oil delivery passage 332 is also provided in the rotary shaft 120, and a third oil delivery passage 333 is provided in the eccentric 130. Oil supply device 310 is configured to supply lubricating oil to first oil pipe 320, and first oil pipe 320 is connected to first oil delivery passage 331; one end of the second oil delivery passage 332 is connected to the first oil delivery passage 331, and the other end of the second oil delivery passage 332 is positioned on the outer surface of the rotating shaft 120; one end of the third oil delivery passage 333 is connected to the second oil delivery passage 332, and the other end of the third oil delivery passage 333 is located on the outer surface of the eccentric 130.

In the lubrication system for a plunger pump according to the embodiment of the present disclosure, since first oil pipe 320 is connected to first oil delivery passage 331, lubricating oil can be delivered into first oil delivery passage 331 through first oil pipe 320; at this time, since one end of the second oil delivery passage 332 is connected to the first oil delivery passage 331 and the other end of the second oil delivery passage 332 is positioned on the outer surface of the rotating shaft 120, the lubricating oil can enter the second oil delivery passage 332 from the first oil delivery passage 331 and flow out from the second oil delivery passage 332, thereby lubricating the outer surface of the rotating shaft 120; on the other hand, since one end of the third oil delivery passage 333 is connected to the second oil delivery passage 332 and the other end of the third oil delivery passage 333 is located at the outer surface of the eccentric 130, the lubricating oil can also enter the third oil delivery passage 333 from the second oil delivery passage 332 and flow out from the third oil delivery passage 333, thereby lubricating the outer surface of the eccentric. Therefore, the lubricating system can establish a continuous through internal lubricating oil path in the parts by opening the oil conveying channel in the parts such as the rotating shaft and the eccentric wheel, so that the parts can be fully lubricated and cooled, the utilization rate of lubricating oil is improved, and the service life of the parts is prolonged.

In some examples, as shown in fig. 1 and 2, the lubrication system 300 further includes an oil supply unit 310, the oil supply unit 310 including a lubrication oil pump 315; oil supply device 310 is connected to first oil pipe 320, and is configured to pump lubricating oil into first oil pipe 320.

In some examples, the rotating shaft 120 may be a straight shaft, and the straight shaft 120 and the eccentric 130 cooperate to realize an eccentric mechanism.

In some examples, as shown in fig. 1 and 2, the second oil delivery passage 332 extends to the outer surface of the rotating shaft 120 in the radial direction of the rotating shaft 120, and the third oil delivery passage 333 extends to the outer surface of the eccentric 130 in the radial direction of the eccentric. For example, the second oil delivery passage 332 may be a linear passage extending in the radial direction of the rotating shaft 120, and the third oil delivery passage 333 may be a linear passage extending in the radial direction of the eccentric wheel. Thus, the second oil delivery passage 332 and the third oil delivery passage 333 facilitate the delivery of the lubricating oil. Of course, the embodiments of the present disclosure include, but are not limited to, the specific shapes of the second oil delivery passage and the third oil delivery passage are also set according to practical situations, as long as one end of the second oil delivery passage is connected to the first oil delivery passage, and the other end of the second oil delivery passage is located on the outer surface of the rotating shaft; one end of the third oil delivery channel is connected with the second oil delivery channel, and the other end of the third oil delivery channel is located on the outer surface of the eccentric wheel.

In some examples, as shown in fig. 1 and 2, the plunger pump 100 further includes a bearing 140, and the bearing 140 is disposed on the rotating shaft 120 on one side of the eccentric 130 in the axial direction of the rotating shaft 120. As shown in fig. 3A and 3B, the lubrication system 300 further includes a first oil hole 341; the first oil hole 341 is located in the eccentric wheel 130, one end of the first oil hole 341 is located in the third oil delivery passage 333, and the other end of the first oil hole 341 is located on a side surface of the eccentric wheel 130 facing the bearing 140. Thereby, the lubricating oil in the third oil delivery passage 333 can enter the first oil hole 341 and be ejected from the side surface of the eccentric 130 facing the bearing 140, so that the bearing 140 can be lubricated. Therefore, the lubricating system can further improve the lubricating effect and the lubricating oil utilization rate and prolong the service life of parts.

For example, as shown in fig. 3A and 3B, the first oil hole 341 is located on a side wall of the third oil delivery passage 333.

In some examples, as shown in fig. 3A and 3B, two first oil holes 341 may be provided on a side wall of the third oil delivery passage 333, respectively extending from the third oil delivery passage 333 to both side surfaces of the eccentric 130 in the axial direction of the rotating shaft 120, so that the bearings 140 provided on both sides of the eccentric 130 may be lubricated.

For example, as shown in fig. 3A and 3B, the cross-sectional area of the first oil hole 341 is smaller than the cross-sectional area of the third oil delivery passage 333, thereby facilitating the ejection of lubricating oil from the first oil hole 341, and thus the lubricating efficiency for the bearing 140.

For example, the cross-sectional area of the first oil hole 341 is less than one-fourth of the cross-sectional area of the third oil delivery passage 333.

In some examples, as shown in fig. 3A and 3B, the lubrication system 300 further includes: and an oil reservoir 350 formed at a side of the eccentric wheel 130 adjacent to the rotation shaft 120, the oil reservoir 350 being connected to the second oil delivery passage 332 and the third oil delivery passage 333, respectively. Thus, the oil reservoir 350 can store a certain amount of lubricating oil, so that the lubricating oil can sufficiently lubricate parts such as the eccentric wheel and the bearing.

In some examples, as shown in fig. 1 and 2, the plunger pump 100 includes a plurality of eccentric wheels 130 spaced apart on the rotating shaft 120; that is, the number of the eccentric wheels is plural, and the eccentric wheels 130 are provided at intervals on the rotation shaft 120. At this time, the lubrication system 300 includes a plurality of second oil delivery passage groups 3320 and a plurality of third oil delivery passage groups 3330, each of the second oil delivery passage groups 3320 includes at least one second oil delivery passage 332, and each of the third oil delivery passage groups 3330 includes at least one third oil delivery passage 333. The plurality of second oil delivery passage groups 3320 are spaced apart in the axial direction of the rotating shaft 120, the plurality of third oil delivery passage groups 3330 are disposed in one-to-one correspondence with the plurality of eccentrics 130, and the plurality of second oil delivery passage groups 3320 are disposed in one-to-one correspondence with the plurality of third oil delivery passage groups 3330. Thus, the lubricating system can be provided with a corresponding second oil delivery channel group and a corresponding third oil delivery channel group according to the number and the positions of the eccentric wheels, so that each eccentric wheel and the parts connected with the eccentric wheels are lubricated.

For example, a plurality of second oil delivery passages may be included in each second oil delivery passage group, so that the delivery efficiency may be improved; each third oil delivery passage group may also include a plurality of third oil delivery passages, so that the delivery efficiency may also be improved.

In some examples, as shown in fig. 3A and 3B, each second oil delivery passage set 3320 includes two second oil delivery passages 332, and the included angle between the extending directions of the two second oil delivery passages 332 ranges between 110 degrees and 160 degrees, so that the lubricant can be better distributed on the outer surface of the rotating shaft.

In some examples, as shown in fig. 3A and 3B, each third oil delivery passage group 3330 includes two third oil delivery passages 333, and the included angle between the extending directions of the two third oil delivery passages 333 is between 110 degrees and 160 degrees, so that the lubricating oil can be better distributed on the outer surface of the eccentric wheel.

In some examples, as shown in fig. 1 and 2, the plunger pump 100 further includes a connecting rod bushing 150 and a connecting rod 160, the connecting rod 160 includes a connecting rod big end 162, a connecting rod small end 164, and a connecting rod body 166 connecting the connecting rod big end 162 and the connecting rod small end 164, the connecting rod bushing 150 is installed inside the connecting rod big end 162, and the connecting rod bushing 150 is sleeved on the eccentric 130. The lubrication system 300 includes: and a second oil hole 342 positioned in the connecting rod bush 150 and penetrating the connecting rod bush 150. Thus, after the lubricating oil flows out of the third oil delivery passage 330, the lubricating oil can be filled between the eccentric 130 and the connecting rod bush 150, thereby lubricating the eccentric 130 and the connecting rod bush 150; then, since the second oil hole 342 is located in the connecting rod bush 150 and penetrates the connecting rod bush 150, the lubricating oil can be transferred from the inner surface of the connecting rod bush 150 close to the eccentric wheel 130 to the outer surface of the connecting rod bush 150 far from the eccentric wheel 130 through the second oil hole 342, thereby lubricating the outer surface of the connecting rod bush 150 and the connecting rod head 162.

In some examples, as shown in fig. 1 and 2, the plunger pump 100 further includes a cross pin 170, and the connecting rod small head 164 is sleeved on the cross pin 170; the lubrication system 300 further comprises: a fourth oil delivery passage 334 in the connecting rod shaft 166; one end of the fourth oil delivery passage 334 is connected to the connecting rod bushing 150, and the other end of the fourth oil delivery passage 334 is connected to the crosshead pin 170. Thus, the lubrication head may be transferred from the outer surface of the connecting rod bushing 150 to the crosshead pin 170 through the fourth oil transfer passage 334, so that the crosshead pin 170 may be lubricated.

In some examples, as shown in fig. 1 and 2, the plunger pump 100 further includes a crosshead pin bushing 180 that fits over the connecting rod stub 164; a crosshead 190 coupled to the crosshead pin bushing 180; and a crosshead slide bushing 195, the crosshead 190 being disposed within the crosshead slide bushing 195; the lubrication system 300 further comprises: a third oil hole 343 in the crosshead pin shaft 170; and a fourth oil hole 344 in the connecting rod small end 164. The third oil hole 343 penetrates the crosshead pin shaft 170 in the radial direction of the crosshead pin shaft 170, one end of the third oil hole 343 is connected to the fourth oil delivery passage 334, the other end of the third oil hole 343 is connected to the inner surface of the crosshead pin shaft 170, one end of the fourth oil hole 344 is connected to the outer surface of the crosshead pin shaft 170, and the other end of the fourth oil hole 344 is connected to the crosshead pin bearing bush 180. In the plunger pump, the above-described rotating shaft 120 is engaged with the eccentric 130 to realize an eccentric mechanism, so that the rotational motion of the rotating shaft is converted into the linear motion of the crosshead. In this lubrication system, the lubricating oil may enter the third oil hole 343 from the fourth oil delivery passage 334 and then lubricate the inner surface of the crosshead pin shaft 170; thereafter, the lubricating oil may be delivered to the cross-pin bush 180 through the fourth oil hole 344, so that the cross-pin bush 180 may be lubricated. In addition, lubricating oil may be supplied from the fourth oil hole 344 to between the crosshead shoe 195 and the crosshead 190, thereby lubricating the crosshead shoe 195 and the crosshead 190.

In some examples, as shown in fig. 1 and 2, the lubrication system 300 further includes an oil return port 360; the oil return opening 360 is located on the first housing 111 and is communicated with the first cavity 210.

In the lubricating system for the plunger pump provided by the embodiment of the present disclosure, as shown in fig. 1 and 2, at least three internal lubricating oil paths may be formed as follows:

first internal lubrication oil passage: after the lubricant oil is introduced from the first oil pipe 320 into the first oil delivery passage 331 in the rotating shaft 120, the lubricant oil may be distributed to each eccentric 130 and the third oil delivery passage 333 in the eccentric 130 through the second oil delivery passage 332; then, the lubricating oil lubricates the connecting rod bearing shell 150 through the third oil delivery passage 333, and lubricates the inner surface and the outer surface of the connecting rod bearing shell 150 through the second oil hole 342 in the connecting rod bearing shell 150; finally, the lubricant may flow out through the oil return port 360 and return to the oil supply 310.

Second internal lubrication oil passage: after the lubricant oil is introduced from the first oil pipe 320 into the first oil delivery passage 331 in the rotary shaft 120, the lubricant oil can be distributed to each eccentric 130 and the third oil delivery passage 333 in the eccentric 130 through the second oil delivery passage 332; then, the lubricating oil may be ejected from a side surface of the eccentric 130 facing the bearing 140 through the first oil hole 341 in the eccentric 130, thereby lubricating the bearing 140 on the rotating shaft 120; finally, the lubricant may flow out through the oil return port 360 and return to the oil supply 310.

A third internal lubrication oil passage: after the lubricant oil is introduced from the first oil pipe 320 into the first oil delivery passage 331 in the rotating shaft 120, the lubricant oil may be distributed to each eccentric 130 and the third oil delivery passage 333 in the eccentric 130 through the second oil delivery passage 332; then, the lubricating oil lubricates the connecting rod bearing shell 150 through the third oil delivery passage 333, and lubricates the inner surface and the outer surface of the connecting rod bearing shell 150 through the second oil hole 342 in the connecting rod bearing shell 150; thereafter, the lubricating oil enters the third oil hole 343 from the fourth oil delivery passage 334, and then lubricates the inner surface of the crosshead pin shaft 170; thereafter, the lubricating oil may be delivered to the crosshead pin bush 180 and the crosshead 190 through the fourth oil hole 344, thereby lubricating the crosshead pin bush 180, the crosshead 190, and the crosshead shoe 195; finally, the lubricant may flow out through the oil return port 360 and return to the oil supply 310.

As mentioned above, the lubricating system establishes a plurality of continuous through internal lubricating oil paths by opening the oil conveying channel and the oil hole in the parts of the plunger pump, can fully lubricate and cool the parts of the plunger pump, and can improve the utilization rate of lubricating oil and prolong the service life of the parts.

Fig. 4 is a schematic diagram of a lubrication system for a plunger pump according to an embodiment of the present disclosure. Fig. 5 is a schematic cross-sectional view of another lubrication system for a plunger pump according to an embodiment of the present disclosure. As shown in fig. 2, 4 and 5, the plunger pump 100 further includes a second housing 112 for forming a second cavity 220; the second cavity 220 is coupled to the first cavity 210, the second cavity 220 is configured to receive the crosshead 190, and the linkage rod 160 may extend from the first cavity 210 to the second cavity 220. At this time, the lubrication system 300 further includes: a first oil inlet 371 and a second oil pipe 380; the first oil inlet 371 is located on the second housing 112 and is communicated with the second cavity 220; one end of the second oil pipe 380 is connected to the first oil pipe 320, and the other end of the second oil pipe 380 is connected to the first oil inlet 371. Thus, the lubrication system may also lubricate the second cavity 220 and the components in the second cavity 220 (e.g., the crosshead pin bearing bushes 180, the crosshead 190, and the crosshead shoe 195 described above) directly through the second oil pipe 380 and the first oil inlet 371. It should be noted that the first housing and the second housing may be an integrated housing structure, and the disclosed embodiments herein use only the first housing and the second housing to distinguish their positions and functions, and do not require that the first housing and the second housing are structurally independent from each other.

In some examples, as shown in fig. 4 and 5, the second housing 112 includes a plurality of second cavities 220 therein, and the lubrication system 300 further includes a plurality of second oil pipes 380, the plurality of second oil pipes 380 being disposed in one-to-one correspondence with the plurality of second cavities 220. Therefore, the lubricating system can lubricate the plurality of second cavities through the plurality of second oil pipes, so that the lubricating system can be fully lubricated.

In some examples, as shown in fig. 4 and 5, the lubrication system 300 further includes: a fifth oil delivery passage 335, a second oil inlet 372, a third oil inlet 373, a third oil pipe 392, and a fourth oil pipe 394. The fifth oil delivery passage 335 connects the plurality of second cavities 220; the second oil inlet 372 is located at a first side of the second housing 112; the third oil inlet 373 is located at the second side of the second housing 112, and the first side and the second side are arranged along the axial direction of the rotating shaft 120; one end of the third oil pipe 392 is connected with the first oil pipe 320, and the other end of the third oil pipe 392 is connected with the second oil inlet 372; one end of the fourth oil pipe 394 is connected to the first oil pipe 320, and the other end of the fourth oil pipe 394 is connected to the third oil inlet 373. One end of the fifth oil transportation channel 335 is connected to the second oil inlet 372, and the other end of the fifth oil transportation channel 335 is connected to the third oil inlet 373. Therefore, lubricating oil can enter the fifth oil conveying channel from two sides of the second shell through the third oil pipe and the fourth oil pipe, and the second cavities are lubricated.

In some examples, as shown in fig. 4, the plunger pump 100 further includes a gearbox 198, the lubrication system 300 further includes a fourth oil inlet 374 and a fifth oil tube 396; the fourth oil inlet 374 is located on the housing of the gearbox 198; one end of the fifth oil pipe 396 is connected to the first oil pipe 320, and the other end of the fifth oil pipe 396 is connected to the fourth oil inlet 374. Therefore, lubricating oil can enter the gearbox through the fifth oil pipe, and parts such as gears in the gearbox are lubricated.

Fig. 6A-6B are schematic cross-sectional views of a housing of a gearbox according to an embodiment of the present disclosure. 6A-6B, the housing 198A or 198B of the gearbox 198 includes a sixth oil delivery passage 336, the sixth oil delivery passage 336 being connected to the fourth oil inlet 374; the housing 198A or 198B of the gear case 198 also includes a fifth oil hole 345; one end of the fifth oil hole 345 is connected to the sixth oil delivery passage 336, and the other end of the fifth oil hole 345 is connected to the cavity 230 accommodating the gear pair. Thus, the lubricating oil can lubricate the gear pair through the sixth oil delivery passage 336 and the fifth oil hole 345. Of course, the embodiments of the present disclosure include, but are not limited to, the sixth oil delivery passage and the fifth oil hole may not be provided, and the gear pair may be directly lubricated through the internal oil delivery passage. It should be noted that the housing 198A shown in fig. 6A and the housing 198B shown in fig. 6B may be combined into a housing of a gear box. In addition, the number of the sixth oil delivery passages and the number of the fifth oil holes in the housing are not particularly limited in the embodiments of the present disclosure. That is, the housing of the gearbox may be provided with a plurality of sixth oil delivery passages and a plurality of fifth oil holes according to actual needs.

For example, the housing 198A or 198B of the gearbox 198 may be formed by casting, and then the sixth oil delivery passage 336 and the fifth oil hole 345 may be formed by drilling.

In the lubrication system for a plunger pump according to the embodiment of the present disclosure, in addition to the first internal lubrication oil passage, the second internal lubrication oil passage, and the third internal lubrication oil passage described above, as shown in fig. 1 and 4, the following internal lubrication oil passages may be formed:

a fourth internal lubrication oil passage: lubricating oil enters the second cavity 220 on two sides of the second housing 112 from the third oil inlet 373 and the fourth oil inlet 374 on two sides of the second housing 112 through the third oil pipe 392 and the fourth oil pipe 394 from the first oil pipe 320, and provides lubrication for parts such as the crosshead pin bearing bush 180, the crosshead 190, the crosshead shoe 195 and the like in the two second cavities 220; then, since the fifth oil delivery passage 335 connects the plurality of second cavities 220, the lubricating oil can enter other second cavities 220 through the fifth oil delivery passage 335, thereby lubricating all the second cavities 220 and the components in the second cavities 220; finally, the lubricating oil can return to the oil supply device through the oil return port.

Fifth internal lubrication oil passage: lubricating oil enters the second cavity 220 from the first oil pipe 320 through the second oil pipe 380 to lubricate the second cavity 220 and parts in the second cavity 220; then, since the fifth oil delivery passage 335 connects the plurality of second cavities 220, the lubricating oil can enter other second cavities 220 through the fifth oil delivery passage 335, thereby lubricating all the second cavities 220 and the components in the second cavities 220; finally, the lubricating oil can return to the oil supply device through the oil return port.

Sixth internal lubrication oil passage: lubricating oil enters the gearbox 198 from the first oil pipe 310 through the fifth oil passage 396 and the fourth oil inlet 374, so that parts such as gears in the gearbox 198 are lubricated.

In some examples, as shown in fig. 4 and 5, first oil tube 320 may be a main oil tube and second oil tube 380 may be a sub oil tube, the cross-sectional area of first oil tube 320 being greater than the cross-sectional area of second oil tube 380.

In some examples, first oil tube 320 may be a metal rigid tube, and first oil tube 320 may take a segmented configuration and then be connected by a joint (e.g., casing); second oil tube 380 may also be a metal rigid tube and is connected to first oil tube 320 by a joint. Of course, the disclosed embodiments include, but are not limited to, the first and second oil pipes may also be hoses.

An embodiment of the present disclosure also provides a plunger pump. Fig. 7 is a schematic diagram of a plunger pump according to an embodiment of the disclosure. As shown in fig. 7, the plunger pump 100 includes the lubrication system 300 described above. Therefore, the lubricating system of the plunger pump can establish a continuous through internal lubricating oil path in the parts by opening the oil conveying channel in the parts such as the rotating shaft and the eccentric wheel, so that the parts can be sufficiently lubricated and cooled, and the performance and the service life of the plunger pump can be improved.

The following points need to be explained:

(1) in the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to general designs.

(2) Features of the disclosure in the same embodiment and in different embodiments may be combined with each other without conflict.

The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and shall be covered by the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (16)

1. A lubrication system for a plunger pump, wherein the plunger pump comprises a first housing for forming a first cavity; the rotating shaft is positioned in the first cavity; and an eccentric wheel connected to the rotating shaft, the lubricating system including:

a first oil pipe configured to input lubricating oil;

the first oil conveying channel is positioned in the rotating shaft and extends along the axial direction of the rotating shaft;

the second oil conveying channel is positioned in the rotating shaft;

a third oil delivery channel positioned in the eccentric wheel,

the first oil pipe is connected with the first oil transportation channel; one end of the second oil conveying channel is connected with the first oil conveying channel, and the other end of the second oil conveying channel is positioned on the outer surface of the rotating shaft; one end of the third oil delivery channel is connected with the second oil delivery channel, and the other end of the third oil delivery channel is positioned on the outer surface of the eccentric wheel.

2. The lubrication system for a plunger pump according to claim 1, wherein said second oil delivery passage extends in a radial direction of said rotating shaft and to an outer surface of said rotating shaft, and said third oil delivery passage extends in a radial direction of said eccentric to an outer surface of said eccentric.

3. The lubrication system for a plunger pump according to claim 1, wherein the plunger pump further comprises a bearing provided on the rotating shaft on one side of the eccentric wheel in the axial direction of the rotating shaft, the lubrication system further comprising:

a first oil hole is positioned in the eccentric wheel,

one end of the first oil hole is located in the third oil delivery passage, and the other end of the first oil hole is located on the side surface, facing the bearing, of the eccentric wheel.

4. The lubrication system for a plunger pump according to claim 1, further comprising:

the oil storage tank is positioned at one side of the eccentric wheel close to the rotating shaft,

wherein, the oil storage tank is respectively connected with the second oil transportation channel and the third oil transportation channel.

5. The lubrication system for a plunger pump according to any one of claims 1-4, wherein the plunger pump comprises a plurality of said eccentrics, spaced apart on said shaft, said lubrication system comprising:

a plurality of second oil delivery passage groups each including at least one of the second oil delivery passages, and a plurality of third oil delivery passage groups each including at least one of the third oil delivery passages,

the plurality of second oil delivery channel groups are arranged at intervals in the axial direction of the rotating shaft, the plurality of third oil delivery channel groups are arranged in one-to-one correspondence with the plurality of eccentric wheels, and the plurality of second oil delivery channel groups are arranged in one-to-one correspondence with the plurality of third oil delivery channel groups.

6. The lubrication system for a plunger pump according to claim 5, wherein each of said second oil delivery passage groups includes two of said second oil delivery passages, an angle between extending directions of the two of said second oil delivery passages ranges between 110 degrees and 160 degrees,

each third oil delivery channel group comprises two third oil delivery channels, and the included angle between the extending directions of the two third oil delivery channels ranges from 110 degrees to 160 degrees.

7. The lubrication system for a plunger pump according to any one of claims 1 to 4, wherein said plunger pump further comprises a connecting rod bushing and a connecting rod, said connecting rod comprising a large connecting rod head, a small connecting rod head and a rod body connecting said large connecting rod head and said small connecting rod head, said connecting rod bushing being mounted within said large connecting rod head, said connecting rod bushing being sleeved on said eccentric, said lubrication system comprising:

and the second oil hole is positioned in the connecting rod bearing bush and penetrates through the connecting rod bearing bush.

8. The lubrication system for a plunger pump according to claim 7, wherein said plunger pump further comprises a crosshead pin, said connecting rod small end cap being fitted over said crosshead pin, said lubrication system further comprising:

a fourth oil delivery passage located in the connecting rod body,

one end of the fourth oil delivery channel is connected with the connecting rod bearing bush, and the other end of the fourth oil delivery channel is connected with a crosshead pin shaft.

9. The lubrication system for a plunger pump according to claim 8, wherein said plunger pump further comprises a crosshead pin bushing that fits over said connecting rod stub; the crosshead is connected with the crosshead pin shaft bushing; and a crosshead slide sleeve, the crosshead disposed within the crosshead slide sleeve, the lubrication system further comprising:

the third oil hole is positioned in the crosshead pin shaft; and

a fourth oil hole is positioned in the connecting rod small head,

the third oil hole radially penetrates through the crosshead pin shaft along the crosshead pin shaft, one end of the third oil hole is connected with the fourth oil conveying channel, the other end of the third oil hole is connected with the inner surface of the crosshead pin shaft, one end of the fourth oil hole is connected with the outer surface of the crosshead pin shaft, and the other end of the fourth oil hole is connected with the crosshead pin shaft tile.

10. The lubrication system for a plunger pump according to any one of claims 1-4, wherein the plunger pump further comprises a second housing for forming a second cavity in communication with the first cavity, the second cavity configured to receive a crosshead, the lubrication system further comprising:

the first oil inlet is positioned on the second shell and is communicated with the second cavity; and

and one end of the second oil pipe is connected with the first oil pipe, and the other end of the second oil pipe is connected with the first oil inlet.

11. The lubrication system for a plunger pump according to claim 10, wherein the second housing includes a plurality of the second cavities therein, the lubrication system further comprising a plurality of the second oil pipes, the plurality of the second oil pipes being disposed in one-to-one correspondence with the plurality of the second cavities.

12. The lubrication system for a plunger pump of claim 11, further comprising:

a fifth oil delivery passage connecting the plurality of second chambers;

a second oil inlet located at a first side of the second housing;

the third oil inlet is positioned on the second side of the second shell, and the first side and the second side are arranged along the axial direction of the rotating shaft;

one end of the third oil pipe is connected with the first oil pipe, and the other end of the third oil pipe is connected with the second oil inlet; and

one end of the fourth oil pipe is connected with the first oil pipe, the other end of the fourth oil pipe is connected with the third oil inlet,

one end of the fifth oil transportation channel is connected with the second oil inlet, and the other end of the fifth oil transportation channel is connected with the third oil inlet.

13. The lubrication system for a plunger pump according to any one of claims 1-4, wherein the plunger pump further comprises a gearbox, the lubrication system further comprising:

the fourth oil inlet is positioned on the shell of the gearbox; and

and one end of the fifth oil pipe is connected with the first oil pipe, and the other end of the fifth oil pipe is connected with the fourth oil inlet.

14. The lubrication system for a plunger pump as recited in claim 13, wherein the housing of the gearbox comprises:

the sixth oil conveying channel is connected with the fourth oil inlet; and

and one end of the fifth oil hole is connected with the sixth oil conveying channel, and the other end of the fifth oil hole is connected with the cavity for accommodating the gear pair.

15. The lubrication system for a plunger pump according to any one of claims 1 to 4, further comprising:

the oil supply device comprises a lubricating oil pump,

wherein the oil supply device is connected to the first oil pipe and configured to pump lubricating oil into the first oil pipe.

16. A plunger pump, characterized in that it comprises a lubrication system according to any one of claims 1-15.

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