阅读说明：本技术 一种轻型五缸柱塞泵 (Light five-cylinder plunger pump ) 是由 田志飞 王彦峰 崔文平 刘利新 于 2020-04-03 设计创作，主要内容包括：本发明公开了一种轻型五缸柱塞泵,所述轻型五缸柱塞泵包括动力端总成和液力端总成,所述动力端总成与液力端总成连接,所述轻型五缸柱塞泵的缸间距为9in,所述动力端总成包括曲轴,所述曲轴包括曲颈和曲拐,所述曲颈与曲拐固定连接,所述曲拐有五个,所述曲颈有六个,所述曲颈与曲拐的旋转中心之间的距离为101.6mm,所述轻型五缸柱塞泵的冲程距离为203.2mm。该轻型五缸柱塞泵通过增加冲程、缩减传动比与提高承载能力以提高功率,同时通过减少缸间距、减小大齿轮的齿数与缩减大齿轮和小齿轮的齿厚的方式以减轻自重。该轻型五缸柱塞泵在重量和功率方面同时满足在固井作业工况恶劣的区域作业的条件,工作效率提高。(The invention discloses a light five-cylinder plunger pump which comprises a power end assembly and a hydraulic end assembly, wherein the power end assembly is connected with the hydraulic end assembly, the cylinder spacing of the light five-cylinder plunger pump is 9in, the power end assembly comprises a crankshaft, the crankshaft comprises five crank necks and crank throws, the crank necks are fixedly connected with the crank throws, the number of the crank throws is five, the number of the crank necks is six, the distance between the crank necks and the rotation centers of the crank throws is 101.6mm, and the stroke distance of the light five-cylinder plunger pump is 203.2 mm. The light five-cylinder plunger pump improves power by increasing stroke, reducing transmission ratio and improving bearing capacity, and reduces self weight by reducing cylinder spacing, reducing the number of teeth of a large gear and reducing the tooth thickness of the large gear and a small gear. The light five-cylinder plunger pump simultaneously meets the conditions of operation in the area with poor well cementation operation working conditions in the aspects of weight and power, and improves the working efficiency.)

1. A light five-cylinder plunger pump is characterized in that: the light five-cylinder plunger pump comprises a power end assembly and a hydraulic end assembly, the power end assembly is connected with the hydraulic end assembly, the cylinder spacing of the light five-cylinder plunger pump is 9in, the power end assembly comprises a crankshaft, the crankshaft comprises a crank neck and a crank throw, the crank neck is fixedly connected with the crank throw, the number of the crank throw is five, the number of the crank neck is six, the distance between the crank neck and the rotation center of the crank throw is 101.6mm, and the stroke distance of the light five-cylinder plunger pump is 203.2 mm.

2. A lightweight five-cylinder plunger pump according to claim 1, characterized in that: the power end assembly still includes gear pair assembly, gear pair assembly is located inside the power end assembly, gear pair assembly includes pinion, pinion shaft and gear wheel, pinion fixed connection is at the both ends of pinion shaft, the pinion shaft is parallel with the bent axle, gear wheel connection is at the bent axle both ends, the gear wheel reduces drive ratio through reducing the number of teeth.

3. A lightweight five-cylinder plunger pump according to claim 2, characterized in that: the transmission ratio of the gear pair assembly is 5.5: 1-6: 1.

4. A lightweight five-cylinder plunger pump according to claim 2, characterized in that: the width range of the bull gear is 125-135 mm, and the width range of the pinion gear is 135-145 mm.

5. A light-duty five-cylinder plunger pump according to claim 4, characterized in that: the width of bull gear is 127mm, the width of pinion is 141.7 mm.

6. A lightweight five-cylinder plunger pump according to claim 1, characterized in that: be connected with the bent axle bearing through intensity intensification on the crank journal, power end assembly still includes connecting rod cross head assembly, connecting rod cross head assembly includes connecting rod and cross head, the connecting rod is integral connecting rod, the connecting rod includes connecting rod seat assembly and connecting rod body, connecting rod seat assembly and connecting rod body fixed connection, connecting rod seat assembly rotates with the crank and is connected, the connecting rod body is kept away from the one end and the cross head of connecting rod seat assembly and is connected, be equipped with the little first axle bush of connecting rod between connecting rod body and the cross head, be connected with the clamp plate that is used for injecing the little first axle bush position of connecting rod on the cross head.

7. A lightweight five-cylinder plunger pump according to claim 1, characterized in that: the five crank throws are sequentially a crank throw I, a crank throw II, a crank throw III, a crank throw IV and a crank throw V from one end of the crankshaft, and the crank throws deflect to operate according to the crank throw I, the crank throw V, the crank throw II, the crank throw III and the crank throw IV.

Technical Field

The invention relates to oil and gas exploitation equipment, in particular to a light five-cylinder plunger pump.

Background

In the field of oil and gas exploitation, well cementation is used for sealing oil, gas and water layers and interlayers to prevent oil, gas and water from flowing upwards and create conditions for subsequent underground operation. The design scheme of well cementation construction is realized by well cementation equipment. The well cementation equipment comprises a well cementation vehicle, wherein a plunger pump is arranged on the well cementation vehicle, and the plunger pump is a main power machine used in the working process of conveying well cementation liquid. In a conventional well cementation operation area, the conventional plunger pump can meet the operation requirement; in areas with poor well cementation working conditions, a plunger pump with higher power and displacement than those of conventional well cementation working areas is required to be used. Generally, the larger the rated input power, the larger the volume of the plunger pump, and the heavier the weight.

In the area with severe working conditions, the existing plunger pump has enough power but overweight weight, and the total weight of the well cementing truck does not meet the requirements of regulations; or the weight is in a specified range, but the rated input power is insufficient, so that the output pressure and flow rate do not meet the working condition requirement of well cementation operation, and the operation efficiency is reduced. The existing plunger pump can not meet the conditions of operation in the area with poor working conditions of well cementation operation in the aspects of weight and power, and has low working efficiency.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a light five-cylinder plunger pump, which improves the power by increasing the stroke, increasing the rotating speed and improving the working pressure and reduces the dead weight by reducing the cylinder spacing, reducing the number of teeth of a bull gear and reducing the tooth thickness of the bull gear and a pinion gear. The light five-cylinder plunger pump simultaneously meets the conditions of operation in the area with poor well cementation operation working conditions in the aspects of weight and power, and improves the working efficiency.

The aim of the invention is achieved by the following technical measures: the utility model provides a light-duty five jar plunger pumps, light-duty five jar plunger pumps includes power end assembly and fluid end assembly, power end assembly is connected with fluid end assembly, the jar interval of light-duty five jar plunger pumps is 9in, power end assembly includes the bent axle, the bent axle includes crank neck and crank throw, crank neck and crank throw fixed connection, the crank throw has five, the crank neck has six, the distance between the rotation center of crank neck and crank throw is 101.6mm, the stroke distance of light-duty five jar plunger pumps is 203.2 mm.

Further, power end assembly still includes gear pair assembly, gear pair assembly is located inside the power end assembly, gear pair assembly includes pinion, pinion shaft and gear wheel, pinion fixed connection is at the both ends of pinion shaft, the pinion shaft is parallel with the bent axle, large gear connection is at the bent axle both ends, the gear wheel reduces the drive ratio through reducing the number of teeth.

Furthermore, the transmission ratio of the gear pair assembly is 5.5: 1-6: 1.

Furthermore, the width range of the large gear is 125-135 mm, and the width range of the small gear is 135-145 mm.

Further, the width of the bull gear is 127mm, and the width of the pinion gear is 141.7 mm.

Further, be connected with the crank bearing through intensity enhancement on the crank neck, power end assembly still includes connecting rod cross head assembly, connecting rod cross head assembly includes connecting rod and cross head, the connecting rod is integral connecting rod, the connecting rod includes connecting rod seat assembly and connecting rod body, connecting rod seat assembly and connecting rod body fixed connection, connecting rod seat assembly rotates with the crank and is connected, the one end that connecting rod seat assembly was kept away from to the connecting rod body is connected with the cross head, be equipped with the little first axle bush of connecting rod between connecting rod body and the cross head, be connected with the clamp plate that is used for injecing the little first axle bush position of connecting rod on the cross head.

Furthermore, the five crank throws are sequentially a crank throw I, a crank throw II, a crank throw III, a crank throw IV and a crank throw V from one end of the crankshaft, and the crank throws deflect to operate according to the crank throw I, the crank throw V, the crank throw II, the crank throw III and the crank throw IV.

Compared with the prior art, the invention has the beneficial effects that: 1. the stroke distance of the light five-cylinder plunger pump is increased to 203.2mm by technicians, the displacement is increased, the flow is increased, and the rated input power of the light five-cylinder plunger pump is increased; 2. the light five-cylinder plunger pump adopts two modes to increase the load of the light five-cylinder plunger pump, wherein one mode adopts a crankshaft bearing with strengthened strength, the other mode adopts an integral connecting rod structure, one end of a connecting rod body close to a crosshead is connected with a small-end connecting rod bearing bush, the stress surface of the small-end connecting rod bearing bush, which is contacted with the crosshead, is the bearing surface of the integral connecting rod, the bearing area of the connecting rod is increased, the bearable load is increased, the working pressure of the light five-cylinder plunger pump is increased along with the increase of the working pressure, and the rated input power is increased; 3. technicians reduce the transmission ratio of the gear pair assembly to 5.5: 1-6: 1, the transmission ratio is reduced, the rotating speed is increased, and the rated input power is further increased; 4. the technical personnel reduce the cylinder spacing of the light five-cylinder plunger pump to 9in, thus reducing the dead weight of the light five-cylinder plunger pump; 5. the tooth number of the big gear is reduced, so that the weight of the big gear is reduced, the width of the power end assembly is reduced, and the self weight of the light five-cylinder plunger pump is further reduced; 6. technicians reduce the width of the small gear to 141.7mm, the width of the large gear to 127mm, the width of the power end assembly is reduced, the volume of the light five-cylinder plunger pump is reduced, and the self weight is further reduced; 7. according to the light five-cylinder plunger pump, the vibration of the hydraulic end assembly is reduced by the deflection operation mode of the crank throw according to the crank throw I, the crank throw V, the crank throw II, the crank throw III and the crank throw IV, so that the hydraulic end assembly can stably feed liquid, the liquid feeding of the hydraulic end assembly is sufficient, and the working stability of the light five-cylinder plunger pump is ensured.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic view of the external structure of a lightweight five-cylinder plunger pump.

Fig. 2 is a schematic view of the internal structure of a lightweight five-cylinder plunger pump.

FIG. 3 is a schematic diagram of a power end assembly.

Fig. 4 is a schematic structural view of the gear pair.

Fig. 5 is a schematic view of the structure of the connecting rod crosshead.

Description of the labeling: 1. the hydraulic power end assembly comprises a power end assembly, 2, a hydraulic power end assembly, 3, a lubricating pipeline, 4, a driving flange, 5, a driving flange flat key, 6, a power end shell, 7, a hydraulic power end connecting bolt, 8, a crankshaft, 9, a left big gear, 10, a connecting flat key, 11, a crankshaft bearing, 12, a pinion shaft, 13, a connecting rod crosshead assembly, 14, a hoop, 15, a sensor joint, 16, a valve box, 17, a gland, 18, a press cap, 19, a valve spring, 20, a valve body, 21, a valve seat, 22, a valve spring seat sleeve, 23, a plunger, 24, a packing seal assembly, 25, a packing press cap, 26, a connecting rod seat assembly, 27, a connecting rod body, 28, a connecting rod small head bearing bush, 29, a crosshead, 30, a pull rod, 31, a right big gear, 32, a valve spring seat, 33 and a pressing plate.

Detailed Description

As shown in fig. 1-5, the light five-cylinder plunger pump comprises a power end assembly 1, a hydraulic end assembly 2 and a lubricating pipeline 3. The input end of the power end assembly 1 is connected with a power source, the output end of the power end assembly 1 is connected with the hydraulic end assembly 2, and the lubricating pipeline 3 is connected to the power end assembly 1 and used for lubricating the power end assembly 1.

The power end assembly 1 includes a power end housing 6 and a connection within the power end housing 6. The connecting piece includes gear pair assembly, bent axle 8 and connecting rod crosshead assembly 13 that connect gradually. The crankshaft 8 comprises a crank neck and a crank throw, and the crank neck is fixedly connected with the crank throw. Six crank necks and five crank throws are provided. The five crank throws are sequentially named as a crank throw I, a crank throw II, a crank throw III, a crank throw IV and a crank throw V from the input end of the crankshaft 8 close to the power end assembly 1. And the crank throw I, the crank throw V, the crank throw II, the crank throw III and the crank throw IV deflect and operate around the rotation center of the crank neck. The deflection operation mode of the crank throw reduces the vibration of the hydraulic end assembly 2, so that the hydraulic end assembly 2 can stably feed liquid, the liquid feeding of the hydraulic end assembly 2 is sufficient, and the working stability of the light five-cylinder plunger pump is ensured.

The distance between the crank neck and the rotation center of the crank throw is 101.6mm, the stroke distance of the light five-cylinder plunger pump is 203.2mm, technicians increase the stroke distance through design and check of the light five-cylinder plunger pump, the discharge capacity of the light five-cylinder plunger pump is increased, the flow is increased, the maximum flow of the light five-cylinder plunger pump can reach 944.6L/min, the flow of the light five-cylinder plunger pump is increased, the rated input power is improved, the end part (on the crank neck) of the crankshaft 8 is connected with a crankshaft bearing 11 which is strengthened in strength in a hot-mounting mode, after the crankshaft bearing 11 is strengthened in strength, the light five-cylinder plunger pump can bear larger load, the bearing capacity of the light five-cylinder plunger pump is improved, the working pressure of the light five-cylinder plunger pump is correspondingly increased, and the rated input power is increased.

The connecting rod-crosshead assembly 13 includes a connecting rod, a crosshead 29 and a tie rod 30 connected in series. The tie rod 30 is bolted to the crosshead 29. The link comprises a link base assembly 26 and a link body 27, and the link body 27 is fixedly connected with the link base assembly 26. The bell crank is connected with the bearing of the connecting rod seat assembly 26, and the end of the connecting rod body 27 far away from the connecting rod seat assembly 26 is connected with the crosshead 29 through a pin.

The connecting rod is integral connecting rod, and integral connecting rod can bear the load of bigger intensity compared with split type connecting rod. A connecting rod small end bearing bush 28 is connected between the connecting rod body 27 and the crosshead 29, the connecting rod small end bearing bush 28 is pressed and connected to one end of the connecting rod body 27 far away from the connecting rod seat assembly 26, and the connecting rod small end bearing bush 28 is pressed and connected in the crosshead 29. The bearing area of the connecting rod body 27 is increased by the connecting rod small end bearing bush 28, the bearing capacity of the connecting rod is increased, the working pressure of the light five-cylinder plunger pump is increased, and the rated input power is increased.

Two pressing plates 33 are connected to the inner portion of the crosshead 29 through bolts, the pressing plates 33 are located at two ends of the connecting rod small-end bearing bush 28, the pressing plates 33 are abutted to two ends of the connecting rod small-end bearing bush 28, and the pressing plates 33 are used for limiting the position of the connecting rod small-end bearing bush 28. The connecting rod small-end bearing bush 28 is kept in a normal working state through the pressing plate 33, so that the connecting rod small-end bearing bush is convenient to disassemble and convenient to replace after being worn.

Technicians design and check the light five-cylinder plunger pump, and the transmission ratio of the gear pair assembly is reduced to 5.5: 1-6: 1. The rotating speed of the light five-cylinder plunger pump is increased, the flow is increased, and the rated input power is increased. The combination of measures of increasing the bearing capacity of the light five-cylinder plunger pump, reducing the transmission ratio and increasing the stroke of the light five-cylinder plunger pump realizes that the rated input power of the light five-cylinder plunger pump is increased to 2500 hp.

The gear pair assembly includes a pinion gear, a pinion shaft 12 and a bull gear. The pinion gears are fixedly connected to both ends of the pinion shaft 12. The two large gears are respectively a left large gear 9 and a right large gear 31, and the rotating directions of the left large gear 9 and the right large gear 31 are opposite. The left big gear 9 is connected with one end of the crankshaft 8 through a connecting flat key 10, and the right big gear 31 is connected with the other end of the crankshaft 8 through the connecting flat key 10. The small gear is meshed with the large gear. The pinion shaft 12 is parallel to the crankshaft 8, and transmission of the pinion and the bull gear is facilitated.

One end of the pinion shaft 12 penetrates through the power end shell 6, the penetrating end of the pinion shaft 12 is the input end of the power end assembly 1, the penetrating end of the pinion shaft 12 is connected with the driving flange 4, and the driving flange 4 is connected with the pinion shaft 12 through the driving flange flat key 5. The pinion shaft 12 is connected to an external power source via the drive flange 4. The technical personnel reduce the number of teeth of the bull gear, the weight of the bull gear is reduced, the volume of the power end assembly 1 is correspondingly reduced, and the self weight of the light five-cylinder plunger pump is reduced.

The left large gear 9 and the right large gear 31 are the same in width, the width range of the left large gear 9 and the right large gear 31 is 125-135 mm, and the width range of the small gear is 135-145 mm. The width of the small gear is 141.7mm, and the width of the left big gear 9 and the right big gear 31 is 127 mm. The pinion shaft 12 can shift along the axial direction of the pinion in the rotating process, the width of the pinion is larger than that of the left big gear 9 and the right big gear 31, the left big gear 9 and the right big gear 31 are always meshed with the pinion in the working process, and the transmission stability is improved. Technical personnel design and check the light five-cylinder plunger pump, and on the premise of meeting the rated input power of the light five-cylinder plunger pump, the widths of the left big gear 9 and the right big gear 31 and the widths of the small gears are reduced, so that the width of the light five-cylinder plunger pump is shortened, and the self weight of the light five-cylinder plunger pump is reduced.

The technician reduces the cylinder spacing of the light-duty five-cylinder plunger pump to 9in, and the light-duty five-cylinder plunger pump has the advantages of reduced volume and reduced dead weight. The light five-cylinder plunger pump has the self weight below 6t by means of reducing the number of teeth of the large gear, reducing the widths of the left large gear 9, the right large gear 31 and the small gear and shortening the cylinder spacing.

And a hydraulic end connecting bolt 7 is connected between the power end assembly 1 and the hydraulic end assembly 2. The fluid end connecting bolt 7 is used for supporting the fluid end assembly 2. The hydraulic end assembly 2 comprises a plunger 23 connected with a pull rod 30, a valve box 16 provided with a liquid inlet and a liquid outlet, a gland 17, a pressure cap 18 and a valve assembly. Plunger 23 and connecting rod 30 are connected by clamp 14. The valve housing 16 is hollow and the plunger 23 penetrates the interior of the valve housing 16. The valve housing 16 is provided with a through hole at a position coaxial with the plunger 23, and the gland 17 is screwed at the through hole. The gland 17 functions to seal the valve housing 16 and the gland 18 serves to stabilize the position of the gland 17. The liquid discharge port is connected with a sensor joint 15, and a device for detecting the internal pressure of the valve box 16 is connected to the sensor joint 15. The user can assemble according to actual detection needs.

The liquid inlet and the liquid outlet are provided with valve assemblies. The valve assembly comprises a valve body 20, a valve seat 21, a valve spring seat 32, a valve spring 19 assembled between the valve body 20 and the valve spring seat 32, and a valve spring seat sleeve 22 for fixing the valve spring seat 32. The valve assembly ensures the one-way passage of fluid and the normal operation of the light five-cylinder plunger pump. Packing seal assembly 24 is filled between plunger 23 and valve box 16, valve box 16 and plunger 23 are connected through packing seal assembly 24 sealing, and packing gland 25 is used for fixed packing seal assembly 24. The packing seal assembly 24 plays a role in sealing, and the working stability of the light five-cylinder plunger pump is improved.

And the lubricating pipeline 3 conveys lubricating oil to the interior of the power end assembly 1 for lubrication. Two ends of the lubricating pipeline 3 penetrate into the power end assembly 1, an oil inlet for oil inlet is formed in the middle of the lubricating pipeline 3, and an oil return opening for oil return is formed in the bottom of the power end assembly 1. The arrangement of the lubricating pipeline 3 reduces the friction of the connecting piece, cools the connecting piece with overhigh temperature in the working process, and ensures the continuous working of the light five-cylinder plunger pump.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.