CN108547766A - A kind of liquid nitrogen pump power end assembly - Google Patents

A kind of liquid nitrogen pump power end assembly Download PDF

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Publication number
CN108547766A
CN108547766A CN201810527055.6A CN201810527055A CN108547766A CN 108547766 A CN108547766 A CN 108547766A CN 201810527055 A CN201810527055 A CN 201810527055A CN 108547766 A CN108547766 A CN 108547766A
Authority
CN
China
Prior art keywords
crankcase
crosshead
assembly
liquid nitrogen
axis
Prior art date
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.)
Pending
Application number
CN201810527055.6A
Other languages
Chinese (zh)
Inventor
李朋
魏小淞
崔海萍
王坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Original Assignee
Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yantai Jereh Petroleum Equipment and Technologies Co Ltd filed Critical Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority to CN201810527055.6A priority Critical patent/CN108547766A/en
Publication of CN108547766A publication Critical patent/CN108547766A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
    • F04B2015/081—Liquefied gases
    • F04B2015/0824—Nitrogen

Abstract

The present invention provides a kind of liquid nitrogen pump power end assembly, including crankcase assembly, crankcase assembly has been correspondingly connected with crosshead housing assembly, and lubricating system is correspondingly provided between crankcase assembly and crosshead housing assembly.Using crankcase assembly and the combination assembly of crosshead housing assembly Split module, crankcase is designed to welded type, crosshead housing design is at cast type, compared with monoblock cast or integral solder, it is not only simple in structure compact, and consider existing processing method, manufacture easy to process, assembly and maintenance, crosshead, which is equipped with, to be threadedly coupled, it can be connect with the fluid end of different size in the market and play the role of passing power, bent axle uses the split structure that d-axis is connected with multiple eccentric wheels by flat key, reduce the difficulty of bent axle overall processing, crosshead axis pin is equipped with top wire hole, the axial float of axis pin can be eliminated by being fixed by jackscrew, lubricating system can protect moving link, extend moving link service life.

Description

A kind of liquid nitrogen pump power end assembly
Technical field
The present invention relates to liquid nitrogen pump technical fields, and in particular to a kind of liquid nitrogen pump power end assembly.
Background technology
Currently, conventional liquid nitrogen pump is mainly used to be pressurized for liquid nitrogen, operating pressure is generally in 16.5MPa or less.Its is worked Journey is similar with common reciprocating pump, is the driving by exterior power, is connecting rod, crosshead and column by bent axle convert rotational motion The linear reciprocating motion of plug, to realize low pressure sucking and the high pressure discharge of fluid media (medium).Because conventional liquid nitrogen pump pressure is relatively low, make It is subject to certain restrictions with range.With the variation of oil field at home operation technique, pressure incrementally increases 40-100MPa, speed of crankshaft Increase to 600-900rpm, because of the increase of pressure and rotating speed, the stress of power end transmission mechanism will increase, to power More stringent requirements are proposed for end housing intensity and the heat dissipation of the lubrication of moving component.
Domestic existing oil field liquid nitrogen pump and integrated system are external import, and the fluid end as high pressure vulnerable part exists External comparative maturity makes it that can not only meet the country and incrementally increases so being necessary to design a kind of liquid nitrogen pump power end Operational pressure, and can be connected with the fluid end of external different size model.
Invention content
The purpose of the present invention overcomes the lubrication heat dissipation problem of existing liquid nitrogen pump power end casing rigidity, moving component, and Can not connection mating with the fluid end of external different size model the problem of, a kind of liquid nitrogen pump power end assembly is provided, can not only Meet the domestic operational pressure incrementally increased, and can be connected with the fluid end of external different size model.
The purpose of the present invention is what is reached by following technical measures:A kind of liquid nitrogen pump power end assembly, including crankcase Body assembly, it is characterised in that：The crankcase assembly has been correspondingly connected with crosshead housing assembly, crankcase assembly and cross It is correspondingly provided with lubricating system between casing assembly.
Further, the crankcase assembly includes crankcase welded case, and bent axle is equipped in crankcase welded case Axle box bearing seat, crankcase bearing seat correspondence are equipped with crankshaft bearing, are equipped with bent axle in crankshaft bearing, bent axle is connected with connecting rod.
Further, the crankcase welded case includes crankcase body and crankcase case lid, crankcase body with it is bent Axle box case lid is connected by crankcase fixing bolt, and crankcase body is equipped with flange mounting surface with cross housing assembly mating surface, Crankcase welded case is equipped with oil return opening.Oil return opening can store the lubricating oil of reflux, realize the continuous lubrication of lubricating oil and return It receives and utilizes.
Further, the bent axle includes d-axis, eccentric wheel and flat key, and eccentric wheel is mounted on by flat key on d-axis, partially Heart wheel and d-axis are equipped with oilhole, and the number of eccentric wheel is multiple, and eccentric wheel is connect with connecting rod.Bent axle using d-axis and The split structure that three eccentric wheels are linked together by flat key reduces the difficulty of bent axle overall processing.
Further, the crosshead housing assembly includes cross casing, and cross casing is matched with crankcase assembly Conjunction face is equipped with flange mounting surface, and crosshead sliding sleeve is equipped in cross casing, and cross casing is equipped with oilhole, cross sliding sleeve Interior to be equipped with crosshead and crosshead axis pin, crosshead is with connecting rod by crosshead pin axis connection, and crosshead is far from crosshead axis pin One end be equipped with and can be equipped with semi-circular oil leab with the screw thread of fluid end clamp connection, crosshead sliding sleeve, cross casing be Cast type.
Further, the crosshead axis pin is equipped with the jackscrew that installation can prevent the jackscrew of crosshead axis pin axial float Hole.
Further, the lubricating system includes main oil pipe and rotary joint, and main oil pipe is connected with branch oil pipe, branch oil pipe packet The first branch oil pipe and the second branch oil pipe are included, the first branch oil pipe is connect by rotary joint with d-axis, the second branch oil pipe and crosshead Shell connects.
Further, first branch oil pipe forms lubrication eccentric wheel, bent axle with the oilhole on eccentric wheel and d-axis The circuit of bearing and connecting rod, the second branch oil pipe are lubricated with the semi-circular on the oilhole and crosshead sliding sleeve on cross casing Oil duct forms the circuit of lubrication crosshead and crosshead sliding sleeve.
Further, the number of the crosshead housing assembly is multiple.
Further, the crankcase assembly is pacified by flange connection surface and multiple crosshead housing assemblies by flange Dress face is bolted with corresponding.Crankcase is designed to welded type, it is this split type by crosshead housing design at cast type Structure than monoblock cast or integral solder convenient for assembly and maintenance.
Compared with prior art, the beneficial effects of the invention are as follows：Using crankcase assembly and crosshead housing assembly point Body formula block combiner assembles, and crankcase is designed to welded type, crosshead housing design at cast type, compared with monoblock cast or Person's integral solder, is not only simple in structure compact, and according to the design feature of each module, has fully considered existing processing side Formula, manufacture, assembly and maintenance easy to process.
It is designed with threaded connection in crosshead, can be played by clamp connection with the conventional fluid end of different size in the market Reinforce the effect of fastening.
Bent axle uses the split structure that d-axis is connected with multiple eccentric wheels by flat key, reduces bent axle overall processing Difficulty.
Crosshead axis pin is equipped with top wire hole, and the axial float that can eliminate axis pin is fixed by jackscrew.
The first branch oil pipe in lubricating system forms lubrication eccentric wheel, bent axle axis with the oilhole on eccentric wheel and d-axis Hold the circuit with connecting rod, the second branch oil pipe and the semi-circular lubricating oil on the oilhole and crosshead sliding sleeve on cross casing Road forms the circuit of lubrication crosshead and crosshead sliding sleeve, and there are oil outlet, storage and reflux lubrications below bent axle welded case Oil, the system completely lubricated can protect moving link, extend the service life of moving link.
It elaborates with reference to the accompanying drawings and detailed description to the present invention.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the front view of the present invention.
Fig. 3 is the structural schematic diagram of crankcase assembly of the present invention.
Fig. 4 is the structural schematic diagram of crosshead housing assembly of the present invention.
Fig. 5 is A-A sectional views in Fig. 2 of the present invention.
Fig. 6 is B-B sectional views in Fig. 5 of the present invention.
Wherein：100- crankcase assemblies, 101- crankcase case lids, 102- crankcase bodies, 103- d-axis, 104- are eccentric Wheel, 105- flat keys, 106- crankshaft bearings, 107- connecting rods, 108- crankcase fixing bolts, 109- crankcase bearing seats, 110- are bent Axle box welded case, 200- crosshead housing assemblies, 201- cross casings, 202- crossheads, 203- crosshead sliding sleeves, 204- Crosshead axis pin, 205- top wire holes, 300- lubricating systems, 301- main oil pipes, 302- branch oil pipes, 303- rotary joints, 304- are returned Hydraulic fluid port.
Specific implementation mode
Embodiment, as shown in Figures 1 to 6, a kind of liquid nitrogen pump power end assembly, including crankcase assembly 100, crankcase Total 100 one-tenth correspond to and are connected with cross housing assembly 200, crankcase assembly 100 and cross shell it is 200 one-tenth total between be correspondingly provided with Lubricating system 300, total 100 one-tenth of crankcase include crankcase welded case 110, set in crankcase welded case 110 there are four Crankcase bearing seat 109, crankcase bearing seat 109 correspond to installation there are four crankshaft bearing 106, and crankshaft bearing 106 is interior to be equipped with song Axis, bent axle are connected with connecting rod 107, and crankcase welded case 110 includes crankcase body 101 and crankcase case lid 102, crankcase Babinet 101 is connect with crankcase case lid 102 by eight crankcase fixing bolts 108, crankcase body 101 and cross casing 200 mating surface of assembly is equipped with flange mounting surface, and for 110 lower section of crankcase welded case there are oil return opening 304, bent axle includes d-axis 103, eccentric wheel 104 and flat key 105, eccentric wheel 104 are mounted on by flat key 105 on d-axis 103, eccentric wheel 104 and d-axis 103 Equipped with oilhole, the number of eccentric wheel 104 is three, and eccentric wheel 104 is connect with connecting rod 107,104 both sides of each eccentric wheel point Not She You 106 crankshaft bearing 106 of crankshaft bearing use cylinder roller bearing, crosshead housing assembly 200 include cross casing 201, the individually casting processing of cross casing 201, cross casing 201 is pacified with the total 100 one-tenth mating surfaces of crankcase equipped with flange Dress face, is equipped with crosshead sliding sleeve 203 in cross casing 201, and cross casing 201 is equipped with oilhole, in cross sliding sleeve 203 Equipped with crosshead 202 and crosshead axis pin 204, the one end of crosshead 202 far from crosshead axis pin 204 is equipped with can be with fluid end card The screw thread of connection is bound round, crosshead 202 is connect with connecting rod 107 by crosshead axis pin 204, and crosshead sliding sleeve 203 is equipped with semi-circular Oil leab, crosshead axis pin 204 are equipped with the top wire hole 205 that installation can prevent the jackscrew of crosshead axis pin axial float, lubrication System 300 includes main oil pipe 301 and rotary joint 303, and main oil pipe 301 is connected with branch oil pipe 302, and branch oil pipe 302 includes first Branch oil pipe and the second branch oil pipe, the first branch oil pipe are connect by rotary joint 303 with d-axis 103, the second branch oil pipe and crosshead Shell 201 connects, and the first branch oil pipe forms lubrication eccentric wheel 104, bent axle with the oilhole on eccentric wheel 104 and d-axis 103 The circuit of bearing 106 and connecting rod 107, lubricating oil can spray the song in 104 both sides of eccentric wheel from the oilhole on eccentric wheel 104 On axle bearing 106, the lubrication of crankshaft bearing 106, the second branch oil pipe and the oilhole and cross on cross casing 201 are realized Semi-circular oil leab on head sliding sleeve 203 forms the circuit of lubrication crosshead 202 and crosshead sliding sleeve 203, and lubricating oil passes through Ten under semi-circular oil leab lubricating movements state on oilhole and crosshead sliding sleeve 203 on cross casing 201 Prefix 202, oil return opening 304 can store and flow back lubricating oil, realize the recycling of lubricating oil, crosshead housing assembly 200 Number is 3, crankcase assembly 100 by flange connection surface and 3 crosshead housing assemblies 200 by flange mounting surface and Correspondence is bolted.
When liquid nitrogen pump work, power is applied to by the flat key 105 on d-axis 103 on eccentric wheel 104, eccentric wheel 104 Connecting rod 107 is driven, and drags crosshead axis pin 204 and crosshead 202 does linear reciprocating motion in crosshead sliding sleeve 203, ten Plunger in prefix 202 and fluid end is by clamp connection, to impart power to fluid end.

Claims (10)

1. a kind of liquid nitrogen pump power end assembly, including crankcase assembly, it is characterised in that：The crankcase assembly, which corresponds to, to be connected It is connected to crosshead housing assembly, lubricating system is correspondingly provided between crankcase assembly and crosshead housing assembly.
2. a kind of liquid nitrogen pump power end assembly according to claim 1, it is characterised in that：The crankcase assembly includes Crankcase welded case, crankcase welded case is interior to be equipped with crankcase bearing seat, and crankcase bearing seat correspondence is equipped with bent axle axis It holds, bent axle is equipped in crankshaft bearing, bent axle is connected with connecting rod.
3. a kind of liquid nitrogen pump power end assembly according to claim 2, it is characterised in that：The crankcase welded case packet Crankcase body and crankcase case lid are included, crankcase body is connect with crankcase case lid by crankcase fixing bolt, crankcase Babinet is equipped with flange mounting surface with crosshead housing assembly mating surface, and crankcase welded case is equipped with oil return opening.
4. a kind of liquid nitrogen pump power end assembly according to claim 2, it is characterised in that：The bent axle include d-axis, partially Heart wheel and flat key, eccentric wheel are mounted on by flat key on d-axis, and eccentric wheel and d-axis are equipped with oilhole, and the number of eccentric wheel is Multiple, eccentric wheel is connect with connecting rod.
5. a kind of liquid nitrogen pump power end assembly according to claim 2, it is characterised in that：The crosshead housing assembly packet Cross casing is included, cross casing is equipped with flange mounting surface with crankcase assembly mating surface, ten are equipped in cross casing Prefix sliding sleeve, cross casing are equipped with oilhole, crosshead and crosshead axis pin, crosshead and connecting rod are equipped in cross sliding sleeve By crosshead pin axis connection, the one end of crosshead far from crosshead axis pin be equipped with can with the screw thread of fluid end clamp connection, ten Prefix sliding sleeve is equipped with semi-circular oil leab.
6. a kind of liquid nitrogen pump power end assembly according to claim 5, it is characterised in that：The crosshead axis pin is equipped with peace Dress can prevent the top wire hole of the jackscrew of crosshead axis pin axial float.
7. a kind of liquid nitrogen pump power end assembly according to claim 4, it is characterised in that：The lubricating system includes main oil Pipe and rotary joint, main oil pipe are connected with branch oil pipe, and branch oil pipe includes the first branch oil pipe and the second branch oil pipe, and the first branch oil pipe is logical It crosses rotary joint to connect with d-axis, the second branch oil pipe is connect with cross casing.
8. a kind of liquid nitrogen pump power end assembly according to claim 7, it is characterised in that：First branch oil pipe and bias Oilhole on wheel and d-axis forms the circuit of lubrication eccentric wheel, crankshaft bearing and connecting rod, the second branch oil pipe and cross head capsule Semi-circular oil leab on oilhole and crosshead sliding sleeve on body forms the circuit of lubrication crosshead and crosshead sliding sleeve.
9. a kind of liquid nitrogen pump power end assembly according to claim 1, it is characterised in that：The crosshead housing assembly Number is multiple.
10. a kind of liquid nitrogen pump power end assembly according to claim 9, it is characterised in that：The crankcase assembly is logical Flange connection surface is crossed to be bolted with corresponding by flange mounting surface with multiple crosshead housing assemblies.
CN201810527055.6A 2018-05-29 2018-05-29 A kind of liquid nitrogen pump power end assembly Pending CN108547766A (en)

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