CN216381803U - Forced injection type lubricating crankshaft of reciprocating plunger pump - Google Patents
Forced injection type lubricating crankshaft of reciprocating plunger pump Download PDFInfo
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- CN216381803U CN216381803U CN202122378790.5U CN202122378790U CN216381803U CN 216381803 U CN216381803 U CN 216381803U CN 202122378790 U CN202122378790 U CN 202122378790U CN 216381803 U CN216381803 U CN 216381803U
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- lubricating oil
- crankshaft
- bearing position
- sealing
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a crankshaft with forced injection type lubrication of a reciprocating plunger pump, which comprises a crankshaft body, wherein a journal of the crankshaft body is provided with a through hole penetrating through the journal, two ends of the through hole are provided with sealing structures to form journal lubrication oil passages, adjacent journal lubrication oil passages are communicated with each other through a connecting oil passage which is perpendicular to the journal lubrication oil passages and is intersected with the journal lubrication oil passages, the connecting oil passage is positioned in a bearing position and is a bearing position lubrication oil passage, the journal lubrication oil passages are parallel to the centerline of the crankshaft, the centerline of each section of the journal lubrication oil passage is superposed with the centerline of the journal in the corresponding position, and the centerline of the bearing position lubrication oil passage is perpendicular to the centerline of the crankshaft. The crankshaft solves the problems that the lubricating oil channel is difficult to process and has stress concentration risk; meanwhile, on the premise of ensuring reliability, the weight of the crankshaft in the prior art can be reduced, and the trend of light weight and compactness of the plunger pump is met.
Description
Technical Field
The utility model belongs to the field of petroleum drilling and production mechanical equipment, and particularly relates to a crankshaft with forced injection type lubrication of a reciprocating plunger pump.
Background
In the field of oil and gas drilling, well cementation, fracturing, acidification and other operations are usually carried out, and the reciprocating plunger pump is an indispensable important existence on well cementation equipment, fracturing equipment and acidification equipment.
The reciprocating plunger pump comprises a power end and a hydraulic end. The main parts of the power end are a reduction box, a crankshaft assembly, a connecting rod crosshead assembly and the like. The crankshaft is one of the most important parts in the reciprocating plunger pump, has a crank shaft integral type and an eccentric wheel split type structure, and changes the completion of circular motion into the key step of reciprocating linear motion.
The lubricating oil hole of the crank shaft with forced injection type lubrication is of a broken line structure, the crank shaft with the structure has large oil duct processing difficulty, and the phenomenon of stress concentration is easy to occur at the overlapped position of the oil ducts.
In addition, most of existing plunger pump crankshafts are connected with a gearbox by adopting an integrated external spline or a split type external spline structure, and the difference between the excircle of the spline and the excircle of a bearing position is large. Due to the fact that reliability of the integrated external spline crankshaft is guaranteed, the integrated external spline crankshaft is often over-designed in the prior art, and mass redundancy is large; split type external splines bent axle, not only the structure is complicated, and stability and reliability during the rotation are not as good as integral type spline bent axle yet.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides the crankshaft with the forced injection type lubrication of the reciprocating plunger pump, which solves the problems of high processing difficulty of a lubricating oil passage and stress concentration risk; meanwhile, on the premise of ensuring reliability, the weight of the crankshaft in the prior art can be reduced, and the trend of light weight and compactness of the plunger pump is met.
In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a lubricated bent axle of reciprocal plunger pump formula of irritating, includes the bent axle body, and every section axle journal department of bent axle body is equipped with the through-hole that runs through the axle journal, and all through-hole both ends set up seal structure, form the axle journal lubrication oil duct, and are adjacent communicate with each other through perpendicular to axle journal lubrication oil duct and the two crossing connection oil duct between the axle journal lubrication oil duct, and this connection oil duct is in the inside of bearing position, for bearing position lubrication oil duct, the axle journal lubrication oil duct is on a parallel with the bent axle central line to the central line of every section axle journal lubrication oil duct and the coincidence of the axle journal central line of relevant position.
In the technical scheme, the journal and the bearing position are respectively provided with a lubricating oil hole which is a journal lubricating oil hole and a bearing position lubricating oil hole, the journal lubricating oil hole is arranged in the journal, the orifice is positioned on the outer circular surface of the journal, the central line of the orifice is vertical to the central line of the journal, the bearing position lubricating oil hole is arranged in the bearing position, the orifice is positioned on the outer circular surface of the bearing position, and the central line of the orifice is superposed with the central line of a bearing position lubricating oil channel.
In the above technical solution, the number of the lubrication oil holes corresponding to each section of journal and the number of the lubrication oil holes corresponding to each bearing position are at least 1.
In the above technical solution, the through hole has zero or several process holes on the bearing location except the through hole penetrating through each section of journal.
In the technical scheme, one side of the crankshaft body is provided with the lubricating oil injection hole, the other side of the crankshaft body is provided with the integrated internal spline, and under the condition that the input power and the diameter of the excircle of the crankshaft bearing position are determined, the torque transmitted by the spline is larger than or equal to the torque transmitted by the crankshaft body.
In the technical scheme, the sealing structure is a sealing gasket sealing structure or a thread sealing structure, the sealing gasket sealing structure comprises a crankshaft plug, a connecting bolt, a nut, a sealing cover, a sealing ring, a flat gasket and a sealing gasket, the connecting bolt penetrates through a journal lubricating oil channel, two ends of the connecting bolt are connected with the sealing cover, an end face sealing ring is arranged between the sealing cover and the side face of the journal, an axial sealing ring is arranged between the sealing cover and an inner hole of the lubricating oil channel, and the sealing gasket and the flat gasket are arranged between the sealing cover and a bolt head of the connecting bolt and between the sealing cover and the nut; and the lubricating oil channel of the shaft neck adjacent to the spline is formed by replacing the sealing cover on one side of the spline with a crankshaft plug.
In the technical scheme, the crankshaft is suitable for all crankshaft with forced lubrication of the reciprocating plunger pump, including but not limited to a three-cylinder plunger pump crankshaft and a five-cylinder plunger pump crankshaft.
The utility model has the beneficial effects that: the lubricating oil passage for the journal, the lubricating oil passage for the bearing position and the lubricating oil hole form a complete lubricating oil passage, compared with the conventional broken line oil passage, the lubricating oil passage not only greatly reduces the processing difficulty, but also eliminates the problem of stress concentration of the oil passage, and reduces the weight of the crankshaft by increasing the fabrication holes on the premise of ensuring the reliability; spline structure in the integral type can be under the prerequisite of ensureing stability, transmits bigger moment of torsion.
Description of the drawings (taking a five-cylinder pump as an example)
Fig. 1 is a front view of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic structural view of a complete lubricating oil passage of the present invention.
Fig. 4 is a left side view of fig. 2.
Fig. 5 is a perspective view of the present invention.
Fig. 6 is a schematic view of the lubricating oil passage of the present invention.
Fig. 7 is a cross-sectional view a-a of fig. 6.
Fig. 8 is a sectional view of B-B in fig. 6.
Wherein: 1. the bearing comprises a shaft neck, 2 bearing positions, 3 shaft neck lubricating oil channels, 4 bearing position lubricating oil channels, 5 internal splines, 6 shaft neck lubricating oil holes, 7 bearing position lubricating oil holes, 8 process holes, 9 crankshaft plugs, 10 connecting bolts, 11 sealing covers, 12 flat gaskets, 13 sealing gaskets, 14 end face sealing rings, 15 axial sealing rings, 16 nuts, 17 oil injection ports.
Detailed description of the preferred embodiment (taking a five-cylinder pump as an example)
The utility model is further described with reference to the following figures and specific examples.
The crankshaft with forced injection type lubrication of the reciprocating plunger pump as shown in fig. 1 to 8 comprises a crankshaft body, wherein a through hole penetrating through a journal is formed in a journal 1 of the crankshaft body, sealing structures are arranged at two ends of the through hole as required to form journal lubrication oil channels 3, adjacent journal lubrication oil channels 3 are communicated through a connecting oil channel which is perpendicular to the journal lubrication oil channels 3 and intersected with the journal lubrication oil channels 3, the connecting oil channel is located in a bearing position 2 and is a bearing position lubrication oil channel 4, the journal lubrication oil channels 3 are parallel to the central line of the crankshaft, and the central line of each section of journal lubrication oil channel 3 is overlapped with the central line of the journal in the corresponding position. One side of the crankshaft is provided with an oil filling port 17, and the oil filling port 17 is communicated with a complete lubricating oil channel. The journal lubricating oil passage 3 is provided with 5 positions, namely a1, b1, c1, d1 and e1, and the bearing position lubricating oil passage 4 is provided with 5 positions, namely a, b, c, d and e.
In the technical scheme, the journal 1 and the bearing position 2 are respectively provided with a journal lubricating oil hole 6 and a bearing position lubricating oil hole 7, the journal lubricating oil hole 6 is arranged in the journal 1, the orifice is positioned on the outer circular surface of the journal, the central line of the orifice is vertical to the central line of the journal, the bearing position lubricating oil hole 7 is arranged in the bearing position 2, the orifice is positioned on the outer circular surface of the bearing position, and the central line of the orifice is superposed with the central line of a bearing position lubricating oil channel.
In the above technical solution, the number of the lubricating oil holes 6 corresponding to each section of journal and the number of the lubricating oil holes 7 corresponding to each bearing position are at least 1.
In the technical scheme, except the through hole penetrating through each section of journal, zero or a plurality of process holes 8 are arranged on the bearing position so as to achieve the purpose of light weight of the bearing. In this embodiment 4 process holes 8. The number of the process holes 8 can be determined according to actual needs or processing requirements, the number of the process holes is different in different processing methods, the process holes can be omitted in the bearing position at the middle, and the process holes are required to be reserved in other bearing positions.
In the technical scheme, one side of the crankshaft body is provided with the lubricating oil filling hole, the other side of the crankshaft body is provided with the integrated internal spline, and under the condition that the input power and the diameter of the excircle of the crankshaft bearing position are determined, the torque transmitted by the spline is larger than or equal to the torque transmitted by the crankshaft body.
In the technical scheme, the sealing structure is a sealing gasket sealing structure, the sealing gasket sealing structure of the journal lubricating oil channel 3 adjacent to the spline comprises a crankshaft plug 9, a connecting bolt 10, a nut 16, a sealing cover 11, an end face sealing ring 14, an axial sealing ring 15, a flat gasket 12 and a sealing gasket 13, the connecting bolt 10 penetrates through the journal lubricating oil channel 3, one end of the connecting bolt is connected with the plug 9, the other end of the connecting bolt is connected with the sealing cover 11, the end face sealing ring 14 is arranged between the sealing cover 11 and the end face of the journal side, the axial sealing ring 15 is arranged between the sealing cover and an inner hole of the lubricating oil channel 3, and the sealing gasket 13 and the flat gasket 12 are arranged between the sealing cover 11 and the bolt head of the connecting bolt 10 and between the crankshaft plug 9 and the nut 16. The sealing gasket sealing structure of the rest journal lubricating oil channels 3 which are not adjacent to the spline needs to replace the crankshaft plug 9 with the sealing cover 11, and the rest structures are not changed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (6)
1. The utility model provides a lubricated bent axle of reciprocal plunger pump formula of annotating by force, includes the bent axle body, characterized by: each section of journal of the crankshaft body is provided with a through hole penetrating through the journal, two ends of each through hole are provided with sealing structures to form journal lubricating oil passages, adjacent journal lubricating oil passages are communicated with each other through a connecting oil passage which is perpendicular to the journal lubricating oil passages and intersected with the journal lubricating oil passages, the connecting oil passage is positioned in the bearing position and serves as a bearing position lubricating oil passage, the journal lubricating oil passages are parallel to the central line of the crankshaft, and the central line of each section of journal lubricating oil passage is superposed with the central line of the journal at the corresponding position.
2. The forced-injection lubricated crankshaft of claim 1, wherein: the lubricating oil holes are arranged at the journal and the bearing position and are respectively a journal lubricating oil hole and a bearing position lubricating oil hole, the journal lubricating oil hole is arranged in the journal, the orifice is positioned on the outer circular surface of the journal, the central line of the orifice is vertical to the central line of the journal, the bearing position lubricating oil hole is arranged in the bearing position, the orifice is positioned on the outer circular surface of the bearing position, and the central line of the orifice is superposed with the central line of the bearing position lubricating oil channel.
3. The forced-injection lubricated crankshaft of claim 2, wherein: the number of the lubricating oil holes corresponding to each section of journal and the number of the lubricating oil holes corresponding to each bearing position are at least 1.
4. The forced-injection lubricated crankshaft of claim 1, wherein: and zero or a plurality of process holes are arranged in the through holes except for the through hole penetrating through each section of journal.
5. The forced-injection lubricated crankshaft of claim 1, wherein: and one side of the crankshaft body is provided with a lubricating oil injection hole, and the other side of the crankshaft body is provided with an integrated internal spline.
6. The forced-injection lubricated crankshaft of claim 1, wherein: the sealing structure is a sealing gasket sealing structure or a thread sealing structure, the sealing gasket sealing structure comprises a crankshaft plug, a connecting bolt, a nut, a sealing cover, a sealing ring, a flat gasket and a sealing gasket, the connecting bolt penetrates through a journal lubricating oil channel, two ends of the connecting bolt are connected with the sealing cover, an end face sealing ring is arranged between the sealing cover and the side face of the journal, an axial sealing ring is arranged between the sealing cover and an inner hole of the lubricating oil channel, and the sealing gasket and the flat gasket are arranged between the sealing cover and the bolt head of the connecting bolt and between the sealing cover and the nut; and the lubricating oil channel of the shaft neck adjacent to the spline is formed by replacing the sealing cover on one side of the spline with a crankshaft plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122378790.5U CN216381803U (en) | 2021-09-29 | 2021-09-29 | Forced injection type lubricating crankshaft of reciprocating plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122378790.5U CN216381803U (en) | 2021-09-29 | 2021-09-29 | Forced injection type lubricating crankshaft of reciprocating plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216381803U true CN216381803U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122378790.5U Active CN216381803U (en) | 2021-09-29 | 2021-09-29 | Forced injection type lubricating crankshaft of reciprocating plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216381803U (en) |
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2021
- 2021-09-29 CN CN202122378790.5U patent/CN216381803U/en active Active
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