CN204283779U - A kind of reciprocating pump cross head design - Google Patents
A kind of reciprocating pump cross head design Download PDFInfo
- Publication number
- CN204283779U CN204283779U CN201420577821.7U CN201420577821U CN204283779U CN 204283779 U CN204283779 U CN 204283779U CN 201420577821 U CN201420577821 U CN 201420577821U CN 204283779 U CN204283779 U CN 204283779U
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- CN
- China
- Prior art keywords
- crosshead
- center
- gear
- cross head
- reciprocating pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of reciprocating pump cross head design, includes motor, coupling, transmission shaft, gear, bent axle and crosshead; Described gear includes two driving gears and two driven gears, is respectively the first driving gear, the second driving gear, the first driven gear and the second driven gear; Described motor drives transmission shaft by coupling; Described crosshead is connected with described crankshaft mobility by connecting rod; Described crosshead one end stretched in the pump housing is provided with two pieces of bearing shells; Described in every block, the outer surface of bearing shell matches with the inwall of the described pump housing; The outer surface of bearing shell described in every block is provided with at least one through groove, and the center line of described groove is curve; The center of the attachment hole that described crosshead is connected for same connecting rod does not overlap with the center of described crosshead.
Description
Technical field
The utility model belongs to reciprocating pump field, refers to a kind of for reciprocating pump cross head design especially.
Background technique
At present, the reciprocating note water pump transmission device that oil field uses is based on belt gearing down, and existing had fractional water flooding pump to adopt gear reduced drive device.The structure of gear reduced drive device includes external gear reduction unit and the built-in unilateral gear of power box slows down two kinds.External gear reduction unit floor space is comparatively large, and structure is not compact; Power box built-in unilateral gear slowing-down structure is compact, but when water injection pump power is larger, Helical gear Transmission wherein can produce larger axial force and radial force, the driving components such as bent axle, by force unbalance, bear alternate load for a long time, make crankshaft bearing eccentric wear, crank shaft oil seal leakage of oil, crankcase generates heat, and noise is large, and the working life of water injection pump reduces.
For above-mentioned problem, prior art proposes a kind of Double side gear-reduction unit of reciprocating type water flood pump, the stable drive of the transmission co-occurrence gear drive of this device, and noise is lower, and crankcase temperature is normal, extends the working life of water injection pump.In this class formation, reciprocating pump promotes crosshead by bent axle to do straight reciprocating motion, drives piston to promote the liquid entered in pump.In existing technology, the part of crosshead and pump contact internal walls, be provided with two pieces of symmetrical bearing shells, to realize sliding between crosshead and pump chamber inner wall, play the effect of sliding bearing, this sliding friction all has wearing and tearing to the pump housing and bearing shell.In use can find, promoted in the reciprocatory movement of connecting rod by bent axle, along with the change of push rod position, the power acted in crosshead also changes thereupon, when push rod be in the beginning push away end time, the power transmitted due to bent axle is because the angle between the center line of push rod and the center line of crosshead is maximum, now act on the radial force maximum (namely relative with piston one end) of crosshead front end, frictional force suffered by bearing shell is herein maximum, when cannot the using of bearing shell herein experience wear, the bearing shell of other parts is still intact, but because the structure of crosshead, make bearing shell can not continue to use, cause the increase of cost.
Model utility content
The utility model is by improving reciprocating pump cross head design, makes bearing shell can carry out front and back and exchanges, improve the working life of bearing shell.
The utility model is achieved through the following technical solutions:
A kind of reciprocating pump cross head design, includes motor, coupling, transmission shaft, gear, bent axle and crosshead; Described gear includes two driving gears and two driven gears, is respectively the first driving gear, the second driving gear, the first driven gear and the second driven gear;
Described motor drives transmission shaft by coupling; Described crosshead is connected with described crankshaft mobility by connecting rod;
Described crosshead one end stretched in the pump housing is provided with two pieces of bearing shells; Described in every block, the outer surface of bearing shell matches with the inwall of the described pump housing; The outer surface of bearing shell described in every block is provided with at least one through groove, and the center line of described groove is curve;
The center of the attachment hole that described crosshead is connected for same connecting rod does not overlap with the center of described crosshead; The center of described attachment hole and the center of described crosshead are all positioned in the axial centerline of described crosshead.
Described transmission shaft is provided with described first driving gear and the second driving gear; The two ends of described bent axle are respectively arranged with described first driven gear and described second driven gear; Described first driving gear coordinates with described first driven gear, and described second driving gear coordinates with described second driven gear.
The center of described attachment hole is arranged at center and the side, described crosshead front end of described crosshead.
Angle I between the axial centerline that described connecting rod center line and described crosshead cross attachment hole center is less than, and described connecting rod and described bent axle tie point are with the angle II between the described crosshead line of centres and the axial centerline at described attachment hole center.
The difference of described angle I and described angle II is not more than 5 degree.
Angle between the sidewall of described groove near piston side and the outer surface of described bearing shell leads fillet process; Angle between another sidewall of described groove and the outer surface of described bearing shell is right angle.
The bottom surface of described groove is plane or cambered surface.
The middle line parallel of adjacent two described grooves.
The beneficial effects of the utility model are:
By the technical program, design by crosshead attachment hole center is not overlapped with crosshead center, when connecting rod is when promoting crosshead, because the reduction of angle, radial component is reduced, decreasing the wearing and tearing to crosshead.
Meanwhile, be provided with the groove of many axis at the outer surface of bearing shell, decrease the area of contact of bearing shell and pump housing inwall, reduce friction.Meanwhile, can lubricant oil be held in groove, be conducive to the lubrication to bearing shell intermediate portion.
Accompanying drawing explanation
Fig. 1 is the utility model reciprocating pump structure schematic diagram;
Fig. 2 is the cross head design schematic diagram of the utility model band connecting rod;
Fig. 3 is the plan view of the utility model bearing shell.
Embodiment
Describe the technical solution of the utility model in detail by the following examples, following embodiment is only exemplary, only can be used for explaining and the technical solution of the utility model being described, and can not be interpreted as being the restriction to technical solutions of the utility model.
In the present embodiment, the general structure of reciprocating pump is not improved, and is prior art, therefore, is not described in detail in this application.The cross head design of the application is only improved the structure of bearing shell part.
As shown in figures 1 and 3, a kind of reciprocating pump crosshead modified node method, includes motor 1, coupling 2, transmission shaft 3, gear, bent axle 8 and crosshead 5; Described gear includes two driving gears and two driven gears, is respectively the first driving gear 4, second driving gear 6, first driven gear 9 and the second driven gear 7; Described transmission shaft 3 is provided with described first driving gear 4 and the second driving gear 6; The two ends of described bent axle 8 are respectively arranged with described first driven gear 9 and described second driven gear 7; Described first driving gear 4 coordinates with described first driven gear 9, and described second driving gear 6 coordinates with described second driven gear 7.
Described motor 1 drives transmission shaft 3 by coupling 2; Described crosshead 5 is flexibly connected with described bent axle 8 by connecting rod 11;
Described crosshead 5 one end stretched in the pump housing is provided with two pieces of bearing shells 51; In the embodiment of the application, bearing shell and crosshead block are separate structure, and in other embodiment of the application, bearing shell and crosshead can be structure as a whole, but are preferably separate structure, like this when bearing shell damages, only change bearing shell and can realize maintenance.Described in every block, the outer surface of bearing shell matches with the inwall of the described pump housing; The outer surface of bearing shell 51 described in every block is provided with at least one through groove 511, and the center line 512 of described groove 511 is curve.Curve herein refers to that is, every bar groove is all provided with an opening two of bearing shell sides, and in the present embodiment, the quantity of groove is two, the middle line parallel of two grooves from a side of bearing shell to the through groove of another side.
The center 53 of the attachment hole 52 that described crosshead 5 is connected for same connecting rod does not overlap with the center 54 of described crosshead 5; The center 53 of described attachment hole is all positioned in the axial centerline of described crosshead with the center 54 of described crosshead.The center of described attachment hole is arranged at center and the side, described crosshead front end of described crosshead.
Angle I between the axial centerline that described connecting rod center line x and described crosshead cross the center 53 of attachment hole is less than, and described connecting rod 11 and described bent axle tie point 111 are with the angle II between center 54 line of described crosshead and the axial centerline at described attachment hole center.The difference of described angle I and described angle II is not more than 5 degree.
Angle between the two side of described groove and the outer surface of described bearing shell leads fillet process.The bottom surface of described groove is plane or cambered surface.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by claims and equivalency thereof.
Claims (8)
1. a reciprocating pump cross head design, includes motor, coupling, transmission shaft, gear, bent axle and crosshead; Described gear includes two driving gears and two driven gears, is respectively the first driving gear, the second driving gear, the first driven gear and the second driven gear; It is characterized in that:
Described motor drives transmission shaft by coupling; Described crosshead is connected with described crankshaft mobility by connecting rod;
Described crosshead one end stretched in the pump housing is provided with two pieces of bearing shells; Described in every block, the outer surface of bearing shell matches with the inwall of the described pump housing; The outer surface of bearing shell described in every block is provided with at least one through groove, and the center line of described groove is curve; The center of the attachment hole that described crosshead is connected for same connecting rod does not overlap with the center of described crosshead; The center of described attachment hole and the center of described crosshead are all positioned in the axial centerline of described crosshead.
2. reciprocating pump cross head design according to claim 1, is characterized in that: described transmission shaft is provided with described first driving gear and the second driving gear; The two ends of described bent axle are respectively arranged with described first driven gear and described second driven gear; Described first driving gear coordinates with described first driven gear, and described second driving gear coordinates with described second driven gear.
3. reciprocating pump cross head design according to claim 1, is characterized in that: the center of described attachment hole is arranged at the side between the center of described crosshead and described crosshead front end.
4. the reciprocating pump cross head design according to claim 1 or 3, it is characterized in that: the angle I between the axial centerline that described connecting rod center line and described crosshead cross attachment hole center is less than, and described connecting rod and described bent axle tie point are with the angle II between the described crosshead line of centres and the axial centerline at described attachment hole center.
5. reciprocating pump cross head design according to claim 4, is characterized in that: the difference of described angle I and described angle II is not more than 5 degree.
6. reciprocating pump cross head design according to claim 1, is characterized in that: the angle between the sidewall of described groove near piston side and the outer surface of described bearing shell leads fillet process; Angle between another sidewall of described groove and the outer surface of described bearing shell is right angle.
7. reciprocating pump cross head design according to claim 1, is characterized in that: the bottom surface of described groove is plane or cambered surface.
8. the reciprocating pump cross head design according to claim 1 or 7, is characterized in that: the middle line parallel of adjacent two described grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420577821.7U CN204283779U (en) | 2014-10-08 | 2014-10-08 | A kind of reciprocating pump cross head design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420577821.7U CN204283779U (en) | 2014-10-08 | 2014-10-08 | A kind of reciprocating pump cross head design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204283779U true CN204283779U (en) | 2015-04-22 |
Family
ID=52866944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420577821.7U Expired - Fee Related CN204283779U (en) | 2014-10-08 | 2014-10-08 | A kind of reciprocating pump cross head design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204283779U (en) |
-
2014
- 2014-10-08 CN CN201420577821.7U patent/CN204283779U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20191008 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |