WO2022116779A1

WO2022116779A1 - Lubricating system for plunger pump and plunger pump

Info

Publication number: WO2022116779A1
Application number: PCT/CN2021/129435
Authority: WO
Inventors: 邓文杰; 菅保国; 刘韦辰; 李朋; 魏小淞; 崔海萍; 王继鑫; 张树林
Original assignee: 烟台杰瑞石油装备技术有限公司
Priority date: 2020-12-01
Filing date: 2021-11-09
Publication date: 2022-06-09
Also published as: CN112412777A

Abstract

A lubricating system for a plunger pump and the plunger pump. In the lubricating system for the plunger pump, the plunger pump (100) comprises a first shell (111), a rotating shaft (120), and an eccentric wheel (130). The lubricating system (300) for the plunger pump (100) comprises a first oil pipe (320) configured to input lubricating oil; a first oil channel (331) located in the rotating shaft (120) and extending in the axial direction of the rotating shaft (120); a second oil channel (332) located in the rotating shaft (120); and a third oil channel (333) located in the eccentric wheel (130). The first oil pipe (320) is connected to the first oil channel (331). One end of the second oil channel (332) is connected to the first oil channel (331), and the other end of the second oil channel (332) is located on the outer surface of the rotating shaft (120). One end of the third oil channel (333) is connected to the second oil channel (332), and the other end of the third oil channel (333) is located on the outer surface of the eccentric wheel (130). Therefore, the lubricating system (300) can fully lubricate and cool parts of the plunger pump (100), the utilization rate of the lubricating oil is increased, and the service life of the parts is prolonged.

Description

Lubrication systems and plunger pumps for plunger pumps

This application claims the priority of Chinese patent application No. 202011387907.X filed on December 01, 2020, and the contents disclosed in the above Chinese patent application are hereby cited in its entirety as a part of this application.

technical field

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

Background technique

Fracturing technology refers to a technology that uses hydraulic action to form fractures in oil and gas layers in the process of oil or gas production. Fractures are formed in oil and gas layers through fracturing technology, which can improve the flow environment of oil or natural gas in the ground and increase the production of oil wells. Therefore, 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 and gas and shale oil and gas, the operating conditions of fracturing operations are becoming more and more complex, so the requirements for fracturing equipment, especially plunger pumps, are also getting higher and higher.

As one of the important components of the plunger pump, the plunger pump lubrication system can effectively protect the parts from damage, prolong the service life of the parts, and play a key role in ensuring the performance of the plunger pump. Good lubrication can not only reduce the frictional resistance and wear of moving parts, but also clean the friction surface and take away the heat and impurities generated by friction, thereby improving the service life of the plunger pump.

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide a lubrication system and a plunger pump for a plunger pump. In the lubrication system for a plunger pump, the plunger pump includes a first housing for forming a first cavity; a rotating shaft, located in the first cavity; and an eccentric, connected to the rotating shaft; at this time, the A lubrication system for a plunger pump includes: a first oil pipe configured to input lubricating oil; a first oil delivery channel located in the rotating shaft and extending along the axial direction of the rotating shaft; a second oil delivery channel located in the rotating shaft The third oil channel is located in the eccentric wheel; the first oil pipe is connected to the first oil channel; one end of the second oil channel is connected to the first oil channel, and the other end of the second oil channel is located at the Outer surface; one end of the third oil transmission channel is connected with the second oil transmission channel, and the other end of the third oil transmission channel is located on the outer surface of the eccentric wheel. As a result, the lubrication system can establish a continuous internal lubricating oil circuit in the parts of the plunger pump by opening oil channels inside the parts of the plunger pump, so that these parts can be fully lubricated and cooled, improving the The utilization rate of lubricating oil increases the service life of components.

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

For example, in a lubricating system for a plunger pump provided by an embodiment of the present disclosure, the second oil supply passage extends along the radial direction of the rotating shaft and extends to the outer surface of the rotating shaft, and the first oil passage extends to the outer surface of the rotating shaft. The three oil delivery passages extend to the outer surface of the eccentric along the radial direction of the eccentric.

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

For example, a lubricating system for a plunger pump provided by an embodiment of the present disclosure further includes: an oil storage tank, located on a side of the eccentric wheel close to the rotating shaft, the oil storage tank is respectively connected to the second oil supply tank The channel is connected with the third oil delivery channel.

For example, in a lubrication system for a plunger pump provided by an embodiment of the present disclosure, the plunger pump includes a plurality of the eccentrics, which are arranged on the rotating shaft at intervals, and the lubrication system includes: a plurality of eccentrics. A second oil transmission channel group and a plurality of third oil transmission channel groups, each of the second oil transmission channel groups includes at least one of the second oil transmission channels, and each of the third oil transmission channel groups includes at least one of the The third oil delivery channel, the plurality of second oil delivery channel groups are arranged at intervals in the axial direction of the rotating shaft, and the plurality of third oil delivery channel groups are arranged in a one-to-one correspondence with the plurality of eccentric wheels, so The plurality of second oil channel groups are arranged in a one-to-one correspondence with the plurality of third oil channel groups.

For example, in a lubrication system for a plunger pump provided by an embodiment of the present disclosure, each of the second oil delivery channel groups includes two of the second oil delivery channels, and two of the second oil delivery channels The included angle between the extending directions of the channels ranges from 110 to 160 degrees, and each third oil channel group includes two third oil channels, and the extending directions of the two third oil channels The included angle ranges between 110-160 degrees.

For example, in a lubrication system for a plunger pump provided by an embodiment of the present disclosure, the plunger pump further includes a connecting rod bearing bush and a connecting rod, and the connecting rod includes a large end of the connecting rod, a small end of the connecting rod, and a connecting rod. The connecting rod body connecting the connecting rod big end and the connecting rod small end, the connecting rod bearing bush is installed in the connecting rod big end, and the connecting rod bearing bush is sleeved on the eccentric wheel, so The lubricating system includes: a second oil hole located in the connecting rod bearing bush and passing through the connecting rod bearing bush.

For example, in a lubrication system for a plunger pump provided by an embodiment of the present disclosure, the plunger pump further includes a crosshead pin, and the small end of the connecting rod is sleeved on the crosshead pin, The lubricating system further includes: a fourth oil delivery channel, located in the connecting rod shaft, 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 Connected to the crosshead pin.

For example, in a lubricating system for a plunger pump provided by an embodiment of the present disclosure, the plunger pump further includes a crosshead pin bearing bush, which is sleeved on the small end of the connecting rod; the crosshead pin bearing bushes are connected; and a crosshead sliding sleeve, the crosshead is arranged in the crosshead sliding sleeve, and the lubricating system further comprises: a third oil hole located in the crosshead pin shaft; and a fourth oil hole, located in the small end of the connecting rod, the third oil hole penetrates the crosshead pin shaft along the radial direction of the crosshead pin shaft, and one end of the third oil hole is connected to the The fourth oil channel is connected to the fourth oil channel, the other end of the third oil hole is connected to the inner surface of the crosshead pin, and one end of the fourth oil hole is connected to the outer surface of the crosshead pin. The other end of the fourth oil hole is connected with the cross pin bearing bush.

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

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

For example, in a lubricating system for a plunger pump provided by an embodiment of the present disclosure, the lubricating system further includes: a fifth oil delivery channel connecting a plurality of the second cavities; a second oil inlet The port is located on the first side of the second casing; the third oil inlet is located on the second side of the second casing, and the first side and the second side are along the axial direction of the rotating shaft Arrangement; a third oil pipe, one end is connected with the first oil pipe, the other end is connected with the second oil inlet; and a fourth oil pipe, one end is connected with the first oil pipe, the other end is connected with the third oil inlet One end of the fifth oil delivery channel is connected with the second oil inlet, and the other end of the fifth oil delivery channel is connected with the third oil inlet.

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

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

For example, a lubricating system for a plunger pump provided by an embodiment of the present disclosure further includes: an oil supply device, including a lubricating oil pump, the oil supply device is connected to the first oil pipe, and is configured to supply all the The first oil pipe is pumped into lubricating oil.

At least one embodiment of the present disclosure further provides a plunger pump, including the lubrication system described in any one of the above.

Description of drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limit the present disclosure. .

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

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

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

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

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

5 is a schematic cross-sectional view of another lubrication system for a plunger pump provided by an embodiment of the present disclosure;

6A-6B are schematic cross-sectional views of a casing 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 present disclosure.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

Unless otherwise defined, technical or scientific terms used in this disclosure shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in this disclosure, "first," "second," and similar terms do not denote any order, quantity, or importance, but are merely used to distinguish the various components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

In a common lubricating system for a plunger pump, since many parts need to be lubricated, multiple lubricating devices need to be equipped, and each lubricating device includes at least one lubricating oil pump, which leads to an increase in cost and increase maintenance difficulty.

In this regard, embodiments of the present disclosure provide a lubrication system and a plunger pump for a plunger pump. In the lubrication system for a plunger pump, the plunger pump includes a first housing for forming a first cavity; a rotating shaft, located in the first cavity; and an eccentric, connected to the rotating shaft; at this time, the A lubrication system for a plunger pump includes: a first oil pipe configured to input lubricating oil; a first oil delivery channel located in the rotating shaft and extending along the axial direction of the rotating shaft; a second oil delivery channel located in the rotating shaft The third oil channel is located in the eccentric wheel, and the oil supply device is configured to provide lubricating oil to the first oil pipe, and the first oil pipe is connected with the first oil channel; one end of the second oil channel is connected to the first oil channel The passages are connected, and the other end of the second oil passage is located on the outer surface of the rotating shaft; one end of the third oil passage is connected with the second oil passage, and the other end of the third oil passage is located on the outer surface of the eccentric. As a result, the lubrication system can establish a continuous internal lubricating oil circuit in the parts of the plunger pump by opening oil channels inside the parts of the plunger pump, so that these parts can be fully lubricated and cooled, improving the The utilization rate of lubricating oil increases the service life of components.

Hereinafter, the lubrication system for a plunger pump and the plunger pump provided by the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

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

As shown in FIGS. 1 and 2 , in the lubrication system for a plunger pump, the plunger pump 100 includes a first casing 111 , a rotating shaft 120 and an eccentric 130 ; the first casing 111 is used to form a first cavity The interior of the first housing 111 is the first cavity 210; the rotating shaft 120 is located in the first cavity 210, and the rotating shaft 120 can rotate around its axis; Drive to rotate. The lubricating system 300 may include a first oil pipe 320, a first oil passage 331, a second oil passage 332 and a third oil passage 333; the first oil pipe 320 is configured to input lubricating oil; the first oil passage 331 is located in Inside the rotating shaft 120 and extending along the axial direction of the rotating shaft 120; The oil supply device 310 is configured to supply lubricating oil to the first oil pipe 320, the first oil pipe 320 is connected to the first oil transmission channel 331; one end of the second oil transmission channel 332 is connected to the first oil transmission channel 331, and the second oil transmission channel 331 The other end of the channel 332 is located on the outer surface of the rotating shaft 120 ;

In the lubrication system for a plunger pump provided by the embodiment of the present disclosure, since the first oil pipe 320 is connected with the first oil transmission channel 331, the lubricating oil can be transported into the first oil transmission channel 331 through the first oil pipe 320; At this time, since one end of the second oil delivery channel 332 is connected to the first oil delivery channel 331, and the other end of the second oil delivery channel 332 is located on the outer surface of the rotating shaft 120, the lubricating oil can enter the second oil delivery channel 331 from the first oil delivery channel 331. The oil passage 332 flows out from the second oil passage 332, thereby lubricating the outer surface of the rotating shaft 120; on the other hand, since one end of the third oil passage 333 is connected with the second oil passage 332, the third oil passage The other end of 333 is located on the outer surface of the eccentric wheel 130, and the lubricating oil can also enter the third oil transmission channel 333 from the second oil transmission channel 332 and flow out from the third oil transmission channel 333, thereby lubricating the outer surface of the eccentric wheel. Therefore, the lubrication system can establish a continuous internal lubricating oil circuit inside these parts by opening oil passages in the parts such as the rotating shaft and the eccentric wheel, so that these parts can be fully lubricated and cooled. Improve the utilization rate of lubricating oil and prolong the service life of components.

In some examples, as shown in FIGS. 1 and 2 , the lubricating system 300 further includes an oil supply device 310, and the oil supply device 310 includes a lubricating oil pump 315; the oil supply device 310 is connected with the first oil pipe 320 and is configured as The lubricating oil is pumped into the first oil pipe 320 .

In some examples, the above-mentioned rotating shaft 120 may be a straight shaft, and the straight shaft 120 cooperates with the eccentric wheel 130 to realize an eccentric wheel mechanism.

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

In some examples, as shown in FIGS. 1 and 2 , the plunger pump 100 further includes a bearing 140 , which is disposed on the rotating shaft 120 and is located on one side of the eccentric wheel 130 in the axial direction of the rotating shaft 120 . As shown in FIGS. 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 , and one end of the first oil hole 341 is located in the third oil delivery channel 333 . The other end of the hole 341 is located on the side surface of the eccentric 130 facing the bearing 140 . Thus, the lubricating oil in the third oil supply passage 333 can enter the first oil hole 341 and be ejected from the side surface of the eccentric wheel 130 facing the bearing 140 , so that the bearing 140 can be lubricated. As a result, the lubrication system can further improve the lubrication effect and lubricating oil utilization rate, and increase the service life of components.

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

In some examples, as shown in FIG. 3A and FIG. 3B , two first oil holes 341 may be provided on the side wall of the third oil delivery channel 333 , respectively extending from the third oil delivery channel 333 to the position of the eccentric wheel 130 at the rotating shaft 120 . The two side surfaces in the axial direction of the eccentric wheel 130 can lubricate the bearings 140 provided on both sides of the eccentric wheel 130 .

For example, as shown in FIG. 3A and FIG. 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 , so that the lubricating oil can be sprayed out from the first oil hole 341 , so as to prevent the bearing 140 from being damaged. Lubrication efficiency.

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

In some examples, as shown in FIG. 3A and FIG. 3B , the lubrication system 300 further includes: an oil storage tank 350 , which is located on the side of the eccentric wheel 130 close to the rotating shaft 120 , and the oil storage tank 350 is respectively connected with the second oil channel 332 and the third oil channel 350 . The oil channel 333 is connected. Therefore, the oil storage tank 350 can store a certain amount of lubricating oil, so that the lubricating oil can sufficiently lubricate the parts such as the eccentric wheel and the bearing.

In some examples, as shown in FIG. 1 and FIG. 2 , the plunger pump 100 includes a plurality of eccentrics 130 , which are arranged on the rotating shaft 120 at intervals; that is, the number of the above-mentioned eccentrics is multiple, and multiple eccentrics The wheels 130 are arranged on the rotating shaft 120 at intervals. At this time, the lubrication system 300 includes a plurality of second oil channel groups 3320 and a plurality of third oil channel groups 3330, each second oil channel group 3320 includes at least one second oil channel 332, each third oil channel The channel group 3330 includes at least one third oil delivery channel 333 . A plurality of second oil channel groups 3320 are arranged at intervals in the axial direction of the rotating shaft 120 , a plurality of third oil channel groups 3330 are arranged in a one-to-one correspondence with a plurality of eccentrics 130 , and a plurality of second oil channel groups 3320 are arranged with a plurality of eccentrics 130 . The third oil channel groups 3330 are arranged in a one-to-one correspondence. Thus, the lubricating system can set the corresponding second oil channel group and the third oil channel group according to the number and position of the eccentric wheel, so as to lubricate each eccentric wheel and the parts connected to the eccentric wheel.

For example, each second oil transmission channel group may include a plurality of second oil transmission channels, so as to improve the transmission efficiency; each third oil transmission channel group may also include a plurality of third oil transmission channels, thereby also improving delivery efficiency.

In some examples, as shown in FIGS. 3A and 3B , each second oil channel group 3320 includes two second oil channels 332 , and the included angle between the extending directions of the two second oil channels 332 is in the range of between 110-160 degrees for better distribution of the lubricating oil to the outer surface of the shaft.

In some examples, as shown in FIGS. 3A and 3B , each third oil channel group 3330 includes two third oil channels 333 , and the included angle between the extending directions of the two third oil channels 333 is in the range of between 110-160 degrees to better distribute the lubricating oil to the outer surface of the eccentric.

In some examples, as shown in FIGS. 1 and 2 , the plunger pump 100 further includes a connecting rod bearing bush 150 and a connecting rod 160 , and the connecting rod 160 includes a large connecting rod end 162 , a small connecting rod end 164 and a connecting rod large end 162 and a connecting rod The connecting rod shaft 166 is connected with the connecting rod small end 164 , the connecting rod bearing bush 150 is installed in the connecting rod big end 162 , and the connecting rod bearing bush 150 is sleeved on the eccentric wheel 130 . The lubrication system 300 includes: a second oil hole 342 located in the connecting rod bearing bush 150 and passing through the connecting rod bearing bush 150 . Therefore, after the lubricating oil flows out from the third oil supply channel 330, the lubricating oil can be filled between the eccentric wheel 130 and the connecting rod bearing bush 150, so as to lubricate the eccentric wheel 130 and the connecting rod bearing bush 150; then, due to the second oil The hole 342 is located in the connecting rod bearing bush 150 and penetrates the connecting rod bearing bush 150 , and the lubricating oil can be transported from the inner surface of the connecting rod bearing bush 150 close to the eccentric wheel 130 to the outer surface of the connecting rod bearing bush 150 away from the eccentric wheel 130 through the second oil hole 342 , so as to lubricate the outer surface of the connecting rod bearing bush 150 and the connecting rod big end 162 .

In some examples, as shown in FIG. 1 and FIG. 2 , the plunger pump 100 further includes a crosshead pin 170, and the connecting rod small end 164 is sleeved on the crosshead pin 170; the lubrication system 300 further includes: a fourth input The oil passage 334 is located in the connecting rod shaft 166; Thus, the lubricating head can be delivered from the outer surface of the connecting rod bearing bush 150 to the crosshead pin 170 through the fourth oil delivery channel 334 , so that the crosshead pin 170 can be lubricated.

In some examples, as shown in FIGS. 1 and 2 , the plunger pump 100 further includes a crosshead pin bush 180 sleeved on the connecting rod small end 164 ; a crosshead 190 connected to the crosshead pin bush 180 ; and a crosshead The head sliding sleeve 195, the cross head 190 is arranged in the cross head sliding sleeve 195; the lubrication system 300 further includes: a third oil hole 343, located in the cross head pin 170; and a fourth oil hole 344, located in the small connecting rod Among the head 164. The third oil hole 343 penetrates the crosshead pin shaft 170 along the radial direction of the crosshead pin shaft 170 , one end of the third oil hole 343 is connected with the fourth oil passage 334 , and the other end of the third oil hole 343 is connected with the crosshead pin shaft The inner surface of the fourth oil hole 344 is connected with the outer surface of the crosshead pin 170 , and the other end of the fourth oil hole 344 is connected with the crosshead pin bush 180 . In the plunger pump, the above-mentioned rotating shaft 120 cooperates with the eccentric wheel 130 to realize an eccentric wheel mechanism, so that the rotary motion of the rotating shaft can be converted into the linear motion of the crosshead. In this lubricating system, the lubricating oil can enter the third oil hole 343 from the fourth oil supply passage 334, and then lubricate the inner surface of the crosshead pin 170; after that, the lubricating oil can be conveyed to the crosshead through the fourth oil hole 344 The head pin bearing bush 180 can be lubricated by the crosshead pin bearing bush 180 . In addition, the lubricating oil can also be delivered from the fourth oil hole 344 to between the cross head sliding sleeve 195 and the cross head 190 , so as to lubricate the cross head sliding sleeve 195 and the cross head 190 .

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

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

The first internal lubricating oil circuit: after the lubricating oil enters the first oil channel 331 in the rotating shaft 120 from the first oil pipe 320, the lubricating oil can be distributed to each eccentric wheel 130 and the eccentric wheel 130 through the second oil channel 332. The third oil delivery channel 333 ; then, the lubricating oil lubricates the connecting rod bearing bush 150 through the third oil delivery channel 333 , and lubricates the inner and outer surfaces of the connecting rod bearing bush 150 through the second oil hole 342 in the connecting rod bearing bush 150 ; Finally, the lubricating oil can flow out through the oil return port 360 and return to the oil supply device 310 .

Second internal lubricating oil circuit: after lubricating oil enters the first oil channel 331 in the rotating shaft 120 from the first oil pipe 320, the lubricating oil can be distributed to each eccentric wheel 130 and the first oil channel in the eccentric wheel 130 through the second oil channel 332. Three oil supply channels 333; then, lubricating oil can be sprayed from the side surface of the eccentric wheel 130 facing the bearing 140 through the first oil hole 341 in the eccentric wheel 130, thereby lubricating the bearing 140 on the rotating shaft 120; finally, lubricating Oil may flow out through the oil return port 360 and return to the oil supply device 310 .

The third internal lubricating oil circuit: after the lubricating oil enters the first oil channel 331 in the rotating shaft 120 from the first oil pipe 320, the lubricating oil can be distributed to each eccentric wheel 130 and the eccentric wheel 130 through the second oil channel 332. The third oil delivery channel 333 ; then, the lubricating oil lubricates the connecting rod bearing bush 150 through the third oil delivery channel 333 , and lubricates the inner and outer surfaces of the connecting rod bearing bush 150 through the second oil hole 342 in the connecting rod bearing bush 150 After that, the lubricating oil enters the third oil hole 343 from the fourth oil delivery channel 334, and then lubricates the inner surface of the crosshead pin 170; after that, the lubricating oil can be delivered to the crosshead pin bush 180 through the fourth oil hole 344 and the cross head 190 , so as to lubricate the cross head pin bearing bush 180 , the cross head 190 and the cross head sliding sleeve 195 ; finally, the lubricating oil can flow out through the oil return port 360 and return to the oil supply device 310 .

As mentioned above, the lubrication system establishes a number of continuous internal lubricating oil passages by opening oil passages and oil holes inside the components of the plunger pump, which can fully lubricate and cool the components of the plunger pump At the same time, it can improve the utilization rate of lubricating oil and prolong the service life of parts.

FIG. 4 is a schematic diagram of a lubrication system for a plunger pump according to an embodiment of the present disclosure. 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 , FIG. 4 and FIG. 5 , the plunger pump 100 further includes a second housing 112 for forming a second cavity 220 ; the second cavity 220 is connected to the first cavity 210 , and the second cavity 220 is 220 is configured to receive the crosshead 190 and the connecting 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 communicated with the second cavity 220; One end 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 . Therefore, the lubrication system can also directly pass the second oil pipe 380 and the first oil inlet 371 to the second cavity 220 and the components in the second cavity 220 (for example, the above-mentioned crosshead pin bearing bush 180, crosshead 190 and crosshead slide 195) for lubrication. It should be noted that the first casing and the second casing may be an integral casing structure, and the embodiment of the present disclosure only uses the first casing and the second casing to distinguish their different positions and functions, and does not The first housing and the second housing are required to be structurally independent from each other.

In some examples, as shown in FIGS. 4 and 5 , the second housing 112 includes a plurality of second cavities 220 , the lubrication system 300 further includes a plurality of second oil pipes 380 , and the plurality of second oil pipes 380 are connected with a plurality of second oil pipes 380 . The second cavities 220 are arranged in a one-to-one correspondence. Thus, the lubrication system lubricates the plurality of second cavities through the plurality of second oil pipes, so that sufficient lubrication can be achieved.

In some examples, as shown in FIGS. 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 channel 335 connects the plurality of second cavities 220 ; the second oil inlet 372 is located on the first side of the second housing 112 ; the third oil inlet 373 is located on the second side of the second housing 112 , 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 to the first oil pipe 320, and the other end of the third oil pipe 392 is connected to the second oil inlet 372; one end of the fourth oil pipe 394 Connected to the first oil pipe 320 , the other end of the fourth oil pipe 394 is connected to the third oil inlet 373 . One end of the fifth oil delivery channel 335 is connected to the second oil inlet 372 , and the other end of the fifth oil delivery channel 335 is connected to the third oil inlet 373 . Therefore, the lubricating oil can enter the fifth oil supply passage from both sides of the second housing through the third oil pipe and the fourth oil pipe, so as to lubricate the plurality of second cavities.

In some examples, as shown in FIG. 4 , the plunger pump 100 further includes a gearbox 198 , and the lubrication system 300 further includes a fourth oil inlet 374 and a fifth oil pipe 396 ; the fourth oil inlet 374 is located in 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 . Thus, the lubricating oil can enter the gear box through the fifth oil pipe, so as to lubricate the gears and other components in the gear box.

6A-6B are schematic cross-sectional views of a casing of a gearbox according to an embodiment of the present disclosure. As shown in FIGS. 6A-6B , the housing 198A or 198B of the gearbox 198 includes a sixth oil channel 336 connected to the fourth oil inlet 374 ; the housing 198A or 198B of the gearbox 198 also A fifth oil hole 345 is included; one end of the fifth oil hole 345 is connected with the sixth oil channel 336 , and the other end of the fifth oil hole 345 is connected with the cavity 230 for accommodating the gear pair. Thus, the lubricating oil can lubricate the gear pair through the sixth oil supply passage 336 and the fifth oil hole 345 . Of course, the embodiments of the present disclosure include, but are not limited to, the above-mentioned sixth oil channel and fifth oil hole, and the gear pair may be lubricated directly through the internal oil channel. It should be noted that the casing 198A shown in FIG. 6A and the casing 198B shown in FIG. 6B can be combined to form a casing of the gearbox. In addition, the embodiment of the present disclosure does not specifically limit the number of the sixth oil channel and the number of the fifth oil hole in the casing. That is to say, the casing of the gear box can be provided with multiple sixth oil passages and multiple fifth oil holes according to actual needs.

For example, the above-mentioned housing 198A or 198B of the gear box 198 can be manufactured by casting, and then the above-mentioned sixth oil passage 336 and fifth oil hole 345 are formed by drilling.

In the lubrication system for a plunger pump provided by the embodiment of the present disclosure, in addition to the above-mentioned first internal lubricating oil circuit, second internal lubricating oil circuit and third internal lubricating oil circuit, as shown in FIG. 1 and FIG. 4 , The following internal lubricating oil paths can also be formed:

Fourth internal lubricating oil circuit: lubricating oil enters from the first oil pipe 320 through the third oil pipe 392 and the fourth oil pipe 394 from the third oil inlet 373 and the fourth oil inlet 374 on both sides of the second housing 112 to the The second cavities 220 on both sides of the second housing 112 provide lubrication for the parts such as the crosshead pin bearing bush 180 , the crosshead 190 and the crosshead sliding sleeve 195 in the two second cavities 220 ; then, due to The fifth oil delivery channel 335 connects the plurality of second cavities 220 , and the lubricating oil can enter the other second cavities 220 through the fifth oil delivery channel 335 , so as to provide all the second cavities 220 and the second cavities 220 . The parts are lubricated; finally, the lubricating oil can be returned to the oil supply device through the oil return port.

Fifth internal lubricating oil circuit: 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 the components in the second cavity 220; then, due to the fifth The oil delivery channel 335 connects the plurality of second cavities 220 , and the lubricating oil can enter the other second cavities 220 through the fifth oil delivery channel 335 , so as to be zero in all the second cavities 220 and the second cavities 220 . The components are lubricated; finally, the lubricating oil can be returned to the oil supply through the oil return port.

Sixth internal lubricating oil passage: lubricating oil enters the gear box 198 from the first oil pipe 310 through the fifth oil passage 396 and the fourth oil inlet 374 to lubricate the gears and other components in the gear box 198 .

In some examples, as shown in FIGS. 4 and 5 , the first oil pipe 320 may be a main oil pipe, the second oil pipe 380 may be an auxiliary oil pipe, and the cross-sectional area of the first oil pipe 320 is larger than that of the second oil pipe 380 .

In some examples, the first oil pipe 320 can be a metal hard pipe, and the first oil pipe 320 can adopt a segmented structure, and then be connected by a joint (such as a casing); the second oil pipe 380 can also be a metal hard pipe and pass through The joint is connected to the first oil pipe 320 . Of course, the embodiments of the present disclosure include, but are not limited to, the first oil pipe and the second oil pipe can also be hoses.

An embodiment of the present disclosure further provides a plunger pump. FIG. 7 is a schematic diagram of a plunger pump according to an embodiment of the present disclosure. As shown in FIG. 7 , the plunger pump 100 includes the above-mentioned lubrication system 300 . Therefore, the lubrication system of the plunger pump can establish a continuous internal lubricating oil circuit in these parts by opening oil passages in the parts such as the rotating shaft and the eccentric wheel, so as to fully lubricate and cool these parts. components to improve the performance and service life of the plunger pump.

The following points need to be noted:

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

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

The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical scope of the present disclosure can easily think of changes or substitutions, which should cover within the scope of protection of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

A lubricating system for a plunger pump, wherein the plunger pump comprises a first casing for forming a first cavity; a rotating shaft located in the first cavity; and an eccentric wheel, and the The rotating shaft is connected, and the lubrication system includes:

a first oil pipe, configured to input lubricating oil;

a first oil delivery channel, located in the rotating shaft and extending along the axial direction of the rotating shaft;

a second oil channel, located in the shaft; and

The third oil channel is located in the eccentric wheel,

Wherein, the first oil pipe is connected with the first oil channel; one end of the second oil channel is connected with the first oil channel, and the other end of the second oil channel is located on the rotating shaft One end of the third oil channel is connected to the second oil channel, and the other end of the third oil channel is located on the outer surface of the eccentric.
The lubricating system for a plunger pump according to claim 1, wherein the second oil supply passage extends in a radial direction of the rotating shaft and extends to an outer surface of the rotating shaft, and the third oil supply passage The radial direction of the eccentric extends to the outer surface of the eccentric.
The lubricating system for a plunger pump according to claim 1 or 2, wherein the plunger pump further comprises a bearing provided on the rotating shaft and located on the shaft of the eccentric in the axial direction of the rotating shaft On one side, the lubrication system further includes:

a first oil hole, located in the eccentric wheel,

Wherein, one end of the first oil hole is located in the third oil delivery channel, and the other end of the first oil hole is located on the side surface of the eccentric facing the bearing.
The lubrication system for a plunger pump according to any one of claims 1-3, further comprising:

an oil storage tank, located on the side of the eccentric wheel close to the rotating shaft,

Wherein, the oil storage tank is respectively connected with the second oil transmission channel and the third oil transmission channel.
The lubricating system for a plunger pump according to any one of claims 1-4, wherein the plunger pump comprises a plurality of the eccentrics arranged on the rotating shaft at intervals, and the lubricating system comprises :

a plurality of second oil channel groups and a plurality of third oil channel groups, each of the second oil channel groups includes at least one of the second oil channel groups, and each of the third oil channel groups includes at least one of the second oil channel groups the third oil channel,

Wherein, the plurality of second oil channel groups are arranged at intervals in the axial direction of the rotating shaft, the plurality of third oil channel groups are arranged in a one-to-one correspondence with the plurality of eccentrics, the plurality of second oil channel groups The oil delivery channel groups are arranged in a one-to-one correspondence with the plurality of third oil delivery channel groups.
The lubricating system for a plunger pump according to claim 5, wherein each of the second oil delivery channel groups comprises two of the second oil delivery channels, and the extending directions of the two second oil delivery channels The angle between them ranges from 110-160 degrees,

Each of the third oil transmission channel groups includes two of the third oil transmission channels, and an included angle between the extending directions of the two third oil transmission channels ranges from 110 to 160 degrees.
The lubrication system for a plunger pump according to any one of claims 1-6, wherein the plunger pump further comprises a connecting rod bearing bush and a connecting rod, and the connecting rod comprises a large end of a connecting rod and a small connecting rod. and the connecting rod body connecting the connecting rod big end and the connecting rod small end, the connecting rod bearing bush is installed in the connecting rod large end, and the connecting rod bearing bush is sleeved on the eccentric wheel , the lubrication system includes:

The second oil hole is located in the connecting rod bearing bush and penetrates the connecting rod bearing bush.
The lubrication system for a plunger pump according to claim 7, wherein the plunger pump further comprises a crosshead pin, the small end of the connecting rod is sleeved on the crosshead pin, and the lubrication system Also includes:

The fourth oil channel is located in the connecting rod shaft,

Wherein, one end of the fourth oil channel is connected to the connecting rod bearing bush, and the other end of the fourth oil channel is connected to the crosshead pin.
The lubricating system for a plunger pump according to claim 8, wherein the plunger pump further comprises a crosshead pin bearing bush, which is sleeved on the small end of the connecting rod; a crosshead, and the crosshead pin The bearing shells are connected; and a cross head sliding sleeve, the cross head is arranged in the cross head sliding sleeve, and the lubricating system further includes:

a third oil hole in the crosshead pin; and

The fourth oil hole is located in the small end of the connecting rod,

Wherein, the third oil hole penetrates the crosshead pin shaft along the radial direction of the crosshead pin shaft, one end of the third oil hole is connected with the fourth oil delivery channel, and the third oil hole The other end of the fourth oil hole is connected with the inner surface of the crosshead pin, one end of the fourth oil hole is connected with the outer surface of the crosshead pin, and the other end of the fourth oil hole is connected with the crosshead pin Bearings are connected.
The lubrication system for a plunger pump according to any one of claims 1-9, wherein the plunger pump further comprises a second housing for forming a second cavity, the second cavity In communication with the first cavity, the second cavity is configured to receive a crosshead, and the lubrication system further includes:

a first oil inlet, located on the second casing and communicated with the second cavity; and

One end of the second oil pipe is connected with the first oil pipe, and the other end is connected with the first oil inlet.
The lubricating system for a plunger pump according to claim 10, wherein the second housing comprises a plurality of the second cavities, the lubricating system further comprises a plurality of the second oil pipes, a plurality of The second oil pipes are arranged in a one-to-one correspondence with the plurality of second cavities.
The lubrication system for a plunger pump of claim 11, wherein the lubrication system further comprises:

a fifth oil delivery channel, connecting a plurality of the second cavities;

a second oil inlet, located on the first side of the second housing;

a third oil inlet, located on the second side of the second housing, the first side and the second side are arranged along the axial direction of the rotating shaft;

a third oil pipe, one end is connected to the first oil pipe, and the other end is connected to the second oil inlet; and

A fourth oil pipe, one end is connected with the first oil pipe, and the other end is connected with the third oil inlet, wherein one end of the fifth oil channel is connected with the second oil inlet, and the fifth oil inlet is connected with the second oil inlet. The other end of the oil delivery channel is connected with the third oil inlet.
The lubrication system for a plunger pump according to any one of claims 1-12, wherein the plunger pump further comprises a gear box, and the lubrication system further comprises:

a fourth oil inlet on the housing of the gearbox; and

One end of the fifth oil pipe is connected with the first oil pipe, and the other end is connected with the fourth oil inlet.
The lubrication system for a plunger pump of claim 13, wherein the housing of the gearbox comprises:

a sixth oil delivery channel, connected to the fourth oil inlet; and

A fifth oil hole, one end of the fifth oil hole is connected with the sixth oil delivery channel, and the other end of the fifth oil hole is connected with the cavity for accommodating the gear pair.
The lubrication system for a plunger pump according to any one of claims 1-14, further comprising:

Oil supply unit, including a lubricating oil pump,

Wherein, the oil supply device is connected with the first oil pipe, and is configured to pump lubricating oil into the first oil pipe.
A plunger pump comprising a lubrication system according to any one of claims 1-15.