CN212079918U

CN212079918U - High-strength and low-vibration assembled crankshaft

Info

Publication number: CN212079918U
Application number: CN202020595369.2U
Authority: CN
Inventors: 徐世林; 徐伟; 陈友东; 廖振东
Original assignee: Sichuan Province Guanghan Sanyang Machinery Manufacturing Co ltd
Current assignee: Sichuan Province Guanghan Sanyang Machinery Manufacturing Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-12-04
Anticipated expiration: 2030-04-20

Abstract

The utility model discloses a high-strength and low-vibration assembled crankshaft, wherein a first crank disk, a second crank disk and a third crank disk are provided with eccentric holes matched with the external diameter of a shaft; the gear ring disc is provided with a central hole matched with the outer diameter of the shaft; the shaft sequentially connects the first crank shaft disc, the shaft sleeve, the second crank shaft disc, the gear ring disc and the third crank shaft disc in a perforation mode; the first crank disk and the shaft sleeve, the shaft sleeve and the second crank disk, the second crank disk and the gear ring disk and the third crank disk are fixedly connected through forging, machining, hot charging and welding; the first crank disk and the shaft are fixedly connected through forging, machining, hot charging and welding. The utility model has the advantages that each part is fixedly connected in the modes of forging, processing, hot charging and welding, so that the bearing capacity of the crankshaft is improved; the surface of the manufactured crankshaft is smoother, and the precision is higher; the violent vibration caused by the eccentric force is overcome; the vibration noise of the equipment is reduced, and the mechanical performance of the equipment is improved.

Description

High-strength and low-vibration assembled crankshaft

Technical Field

The utility model relates to a bent axle field, especially a high strength, low vibration assembled bent axle.

Background

The crankshaft of the shale gas high-pressure drilling pump has the function of converting the rotary motion of a high-power motor into linear reciprocating motion, and the drilling fluid is pumped into a plurality of kilometers of underground holes through a piston and the underground broken rock chips and the drilling fluid are pumped to the ground to do work repeatedly. Because the crankshaft has a complex structure and high precision requirement, the crankshaft is manufactured by adopting a cast steel structure and then processing the cast steel structure by a large-sized special machine tool in the traditional production process. The crankshaft manufactured by adopting the process has the following defects; the investment of large-scale special equipment is huge, and the processing difficulty is large; limited by the casting process, the product body is easy to have casting defects, and major equipment accidents are easy to occur due to the fact that the casting defects are broken off during working; because of the cast asymmetry, the unbalance of the crankshaft body during rotation causes the eccentric moment impact generated by the rotation inertia during rotation, so that the drilling pump generates severe vibration during working to cause the service life of equipment to be low, and the noise is large during the operation of the equipment, so that the working environment of a drilling operation site is poor; the shale gas high-pressure drilling pump aims at solving the problem that the investment of cast crankshaft processing equipment is large, severe vibration generated during working is caused by large eccentric moment of a cast structure body, crankshaft breakage is caused by casting defects which are difficult to avoid, and the like, and the problem that the overall quality performance of the shale gas high-pressure drilling pump is seriously affected.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: aiming at the existing problems, the high-strength and low-vibration assembled crankshaft is provided, and the investment on cast crankshaft processing equipment is reduced, the processing difficulty is reduced, the mechanical performance is improved, the static balance performance and the dynamic balance performance are improved, the severe vibration caused by eccentric moment is overcome, and the harm of drilling site noise is reduced by fixedly connecting all parts in a forging-processing-hot charging-welding mode.

The utility model adopts the technical scheme as follows:

a high-strength and low-vibration assembled crankshaft comprises a crankshaft disc set, a crankshaft, a gear ring disc and a shaft sleeve, wherein the crankshaft disc set comprises a first crankshaft disc, a second crankshaft disc and a third crankshaft disc, and the first crankshaft disc, the second crankshaft disc and the third crankshaft disc are provided with eccentric holes matched with the outer diameter of the shaft; the gear ring disc is provided with a central hole matched with the outer diameter of the shaft; the shaft is used for sequentially connecting the first crank disk, the shaft sleeve, the second crank disk, the gear ring disk and the third crank disk in a perforation manner; the first crank disk and the shaft sleeve, the shaft sleeve and the second crank disk, the second crank disk and the gear ring disk and the third crank disk are fixedly connected through forging, machining, hot charging and welding; the first crank disk and the shaft are fixedly connected through forging, machining, hot charging and welding; one end of the shaft is provided with a shaft shoulder.

The traditional crankshaft structure is cast and processed by processing equipment, and the crankshaft processed by adopting the casting method has the advantages of rough structure, low precision, high investment cost on the aspect of processing equipment and easy occurrence of serious equipment accidents; the utility model provides a high strength, low vibration assembled crankshaft structure carry out fixed connection with each spare part on the bent axle through forging-processing-hot charging-welded mode, have alleviateed crankshaft structure's weight, have improved the mechanical properties of bent axle, have improved dynamic balance simultaneously to in the use, reduced vibrations and the noise in the use, strengthened crankshaft strength.

Furthermore, a first key groove is formed in the central hole, and a matched first key is arranged on the first key groove; and a third key groove matched with the first key is arranged on the shaft.

Still further, the first key groove is provided with at least one.

Set up first keyway on the centre bore of ring gear dish, be used for mainly fixing the ring gear dish, prevent to use rotatory in-process at the bent axle, because fixed not firm accident that appears.

Furthermore, a second key groove is formed in the eccentric hole, and a matched second key is arranged in the second key groove; and a fourth key groove matched with the second key is arranged on the shaft.

Further, at least one of the second key grooves is provided.

The second key groove is formed in the eccentric hole of the shaft sleeve, so that the fixation of the crankshaft disc is mainly enhanced, severe vibration caused by eccentric moment is overcome, and noise harm to the site is reduced.

Further, the eccentric distance of the eccentric hole is 152.4 mm.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. by adopting the high-strength and low-vibration assembled crankshaft provided by the utility model, each part is fixedly connected in a forging-processing-hot charging-welding mode, the bearing capacity of the crankshaft is improved, and the fracture accident of the crankshaft is avoided;

2. by adopting the high-strength and low-vibration assembled crankshaft provided by the utility model, each part is fixedly connected in an assembled mode of forging, processing, hot charging and welding, the surface of the manufactured crankshaft is smoother, and the precision of the manufactured crankshaft is higher;

3. by adopting the high-strength and low-vibration assembled crankshaft provided by the utility model, the severe vibration caused by eccentric force is overcome by arranging the eccentric hole on the crankshaft disc;

4. adopt the utility model provides a high strength, low vibration assembled bent axle carries out fixed connection to the bent axle through the form that adopts the equipment, has reduced at present well drilling operation formula, and the vibration noise that equipment took place has improved equipment mechanical properties.

Drawings

FIG. 1 is a schematic sectional view of a crankshaft

FIG. 2 is a schematic view of the structure of the ring gear plate,

FIG. 3 is a schematic view of the structure of the crank disk

FIG. 4 is a schematic view of the structure of the shaft

The labels in the figure are: 1. a first crank disk; 2. a second crank disk; 3. a third crank disk; 4. a ring gear disc; 5. a shaft shoulder; 6. a shaft sleeve; 7. a first key; 8. a second key; 9. a shaft; 10. a third keyway; 11. a first keyway; 12. an eccentric hole.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

The embodiment discloses a high-strength and low-vibration assembled crankshaft, which comprises a crankshaft disk set, a crankshaft, a gear ring disk 4 and a shaft sleeve 6, wherein the crankshaft disk set comprises a first crankshaft disk 1, a second crankshaft disk 2 and a third crankshaft disk 3, the first crankshaft disk 1, the second crankshaft disk 2 and the third crankshaft disk 3 are respectively provided with an eccentric hole 12 matched with the outer diameter of a shaft, and the first crankshaft disk 1, the second crankshaft disk 2 and the third crankshaft disk 3 are respectively provided with a crankshaft disk with the same structure; the eccentric distance of the eccentric hole 12 is 152.4mm, and the distance of the eccentric hole 12 is set within a range, so that severe vibration caused by eccentric moment is overcome; the gear ring disc 4 is provided with a central hole matched with the outer diameter of the shaft 9; the shaft 9 connects the first crank disk 1, the shaft sleeve 6, the second crank disk 2, the gear ring disk 4 and the third crank disk 3 in sequence in a perforation way; the first crank disk 1 and the shaft sleeve 6, the shaft sleeve 6 and the second crank disk 2, the second crank disk 2 and the gear ring disk 4 and the third crank disk 3 are fixedly connected through forging, machining, hot charging and welding, all parts are connected in a forging, machining, hot charging and welding mode, all parts are connected into a whole and are used together with the shaft 9 as a whole, the bearing capacity of the crankshaft is improved, and crankshaft breakage accidents are avoided; the first crank disk 1 is fixedly connected with the shaft through forging, machining, hot charging and welding, and the first crank disk and the shaft are fixed through forging, machining, hot charging and welding, and the structure is mainly used for fixing the first crank disk, so that the crank disk and parts can be firmly connected together; one end of the shaft is provided with a shaft shoulder 5, and the diameter of the shaft shoulder 5 is fixed by a structure which needs to be manufactured and used.

Example two

This embodiment discloses a high strength, low vibration assembled crankshaft on the basis of embodiment one, compares with embodiment one, and this embodiment has had following structure more: a first key 7 groove is formed in the central hole, and a matched first key 7 is arranged in the first key 7 groove; a third key groove 10 matched with the first key 7 is arranged on the shaft; the first key 7 groove sets up at least one, sets up a plurality of keyways on the centre bore, mainly through the mode of key-type connection, fixes ring gear dish 4, has increased the fixed intensity between spare part and the axle 9.

EXAMPLE III

The embodiment discloses a high-strength and low-vibration assembled crankshaft based on the first embodiment and the second embodiment, and compared with the first embodiment or the second embodiment, the embodiment is additionally provided with the following structures: a second key 8 groove is formed in the eccentric hole 12, and a matched second key 8 is arranged in the second key 8 groove; a fourth key groove matched with the second key 8 is formed in the shaft 9; at least one groove of the second key 8 is provided, and a plurality of eccentric holes 12 are provided, so that the fixing degree between the first crank disk 1 and the shaft 9 and the fixing degree between the second crank disk 2 and the shaft 9 are mainly enhanced.

To sum up, adopt the utility model provides a high strength, low vibration assembled bent axle, the mode through forging-processing-hot charging-welded connection carries out fixed connection to each spare part, adopt the bent axle of this kind of assembled structure, not only reduced the processing degree of difficulty and manufacturing cost, the bearing capacity that has improved the bent axle has avoided bent axle fracture accident, the violent vibration that eccentric moment caused has been overcome, the noise harm of well drilling scene has been reduced, the major accident that produces because of major equipment has been reduced, make the surface of the bent axle of making more smooth, the accuracy is higher.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a high strength, low vibration assembled bent axle which characterized in that: the crankshaft disk assembly comprises a first crankshaft disk, a second crankshaft disk and a third crankshaft disk, wherein the first crankshaft disk, the second crankshaft disk and the third crankshaft disk are provided with eccentric holes matched with the outer diameter of a shaft; the gear ring disc is provided with a central hole matched with the outer diameter of the shaft; the shaft is used for sequentially connecting the first crank disk, the shaft sleeve, the second crank disk, the gear ring disk and the third crank disk in a perforation manner; the first crank disk and the shaft sleeve, the shaft sleeve and the second crank disk, the second crank disk and the gear ring disk and the third crank disk are fixedly connected through forging, machining, hot charging and welding; the first crank disk and the shaft are fixedly connected through forging, machining, hot charging and welding; one end of the shaft is provided with a shaft shoulder.

2. A high strength, low vibration, modular crankshaft as defined in claim 1, wherein: a first key groove is formed in the central hole, and a matched first key is arranged on the first key groove; and a third key groove matched with the first key is arranged on the shaft.

3. A high strength, low vibration, modular crankshaft as claimed in claim 2, wherein: the first keyway is provided with at least one.

4. A high-strength, low-vibration assembled crankshaft as claimed in claim 1 or 2, wherein: a second key groove is formed in the eccentric hole, and a matched second key is arranged in the second key groove; and a fourth key groove matched with the second key is arranged on the shaft.

5. A high strength, low vibration, modular crankshaft as defined in claim 4, wherein: at least one of the second keyways is provided.

6. A high strength, low vibration, modular crankshaft as defined in claim 5, wherein: the eccentric distance of the eccentric hole is 152.4 mm.